JP2011096038A - Position information acquisition device and position information acquisition method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position information acquiring device and a position information acquisition method, allowing automatic high-accuracy acquisition of position information of a specific direction of an information display means, e.g. information regarding height wherein the information display means is installed, without having to previously record the positional information of the information display means. <P>SOLUTION: The position information acquiring device includes an information detection means detecting identification information, used for identification of the information display means displaying information for identifying an article; a coordinate detection means for detecting coordinates, when the identification information is detected by the information detection means to preset reference coordinates; a position information calculation means for calculating information regarding a position, when the identification information is detected by the information detection means, based on the reference coordinates and the coordinates detected by the coordinate detection means; and a position information correction means for detecting the distance to a predetermined reference place, and correcting the information regarding the position in a specified direction, when the identification information calculated by the position information calculation means is detected, based on the distance detected. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a position information acquisition device and a position information acquisition method for acquiring information of a position where an information display means for displaying information on an article is installed.

  In order to identify an article stored in a shelf or the like, a tag on which information related to the article is written (printed) is placed on a shelf that stores the article. For this tag, a paper medium is conventionally used. For example, article information such as an article name and article identification information (barcode) is written on the paper medium, and the tag is pasted on a shelf storing articles. , Identified the goods that were stored. For example, in stores such as supermarkets and convenience stores, products are displayed on product display shelves, and product shelf labels that describe product information such as product names and prices are affixed to the product display shelves.

  Further, in recent years, electronic bills that describe information on the article have been digitized. For example, information display devices including display means such as a liquid crystal display device are used. As a system using this information display device, for example, in a store as described above, there is an electronic shelf label system that displays product information such as product names and prices of products displayed on the product display shelf on the information display device. It's being used. In this electronic shelf label system, an electronic shelf label management server installed in a backyard for storing and managing products on the back side of the store, and a store clerk (employee) carry it to check product management information such as product inventory. A portable terminal device (handy terminal) and an ESL (Electronic Shelf Label) that is installed on a merchandise display shelf and displays merchandise information are connected by communication means such as wireless communication. As a result, work equivalent to work in which a store clerk has pasted product information tags previously described on paper media can be easily performed by changing the display content (display data) of the ESL by means of communication means. This has contributed to reducing the labor of shop assistants by changing the product name associated with the change in the displayed product, changing the display price associated with the change in the product price, and displaying detailed product information associated with the inventory check.

  Also, in this electronic shelf label system, product management data is created by associating the product code of the product displayed on the product display shelf with the shelf label code individually assigned to each ESL. We manage products based on For example, when checking inventory information of products displayed on a product display shelf, a store clerk first reads a shelf label code with a portable terminal device. The mobile terminal device that has read the shelf label code transmits the read shelf label code to the electronic shelf label management server. The electronic shelf label management server that has received the shelf label code transmits the inventory information of the product linked to the shelf label code to the mobile terminal device. The mobile terminal device that has received the product inventory information displays the received product inventory information on the display unit of the mobile terminal device. The store clerk confirms the inventory information of the product displayed on the mobile terminal device. In this way, it is possible to confirm information on the products displayed on the product display shelf.

  As described above, in order to confirm product information, it is first necessary for a store clerk to identify an ESL whose information is to be confirmed, and to read the shelf label code of the identified ESL with a portable terminal device. However, the installation position of the ESL is not limited to the place where the store clerk can reach. Therefore, in Patent Document 1, the product display shelf and the positional information of the ESL installed on the product display shelf are recorded in advance, and the desired ESL is specified remotely using the acceleration sensor provided in the mobile terminal device. Techniques to do this are disclosed.

  In addition, since the display position of the product greatly affects the sales of the product at the above-mentioned stores, it is desirable to acquire and manage information on the display position of the product for the purpose of improving the sales of the product. It is rare. In particular, the information on the level of the merchandise on the merchandise display shelf is very important information for the merchandise sales strategy, and it is desired that this information can be grasped. As means for acquiring information on the display position of the product, for example, it is considered to grasp the display position of the product in the store by acquiring the position information of the ESL displaying the product information.

  However, in the conventional electronic shelf label system, the product management data in which the product code of the product and the ESL shelf code are linked as described above is held in the electronic shelf label management server. The position information of the ESL is not data normally held in the electronic shelf label management server. For this reason, it is impossible to manage information such as which ESL is installed where and information on the display position of the product such as which product display shelf the product is on.

  Patent Document 2 discloses a method of obtaining a product position information based on a product code read in a predetermined order when a product code is read by a mobile terminal device in advance. .

  Patent Document 3 discloses a method in which an output unit that outputs ultrasonic waves and infrared rays is provided in a mobile terminal device, and a detection unit that detects ultrasonic waves and infrared rays is provided in a product display shelf. In this method, the position of the ESL is detected by detecting the ultrasonic wave and infrared rays output when the mobile terminal device reads the product code affixed to the ESL by the detection unit installed on the product display shelf. It is.

JP 2009-91102 A Japanese Patent Laid-Open No. 3-123992 JP 2004-258976 A

  As described above, the method of acquiring the information on the display position of the product by acquiring the position information of the ESL, in particular, the information on what level the product is displayed on the product display shelf, improves the efficiency of store operations. It is a useful way to contribute. However, since the conventional electronic shelf label system does not record the position information of the installed ESL, it is necessary to newly record the position information of the ESL in advance on the electronic shelf label management server. In order to record the ESL position information, it is necessary to manually input a large number of ESL position information corresponding to the number of products to be displayed, and this manual input is a very difficult operation. In addition, changing the displayed product on the product display shelf and changing the ESL position information associated with the change in the product display position in the product display shelf are very complicated operations.

  Moreover, although the technique described in Patent Document 1 specifies an ESL using an acceleration sensor, the acceleration sensor is merely used as an input unit for specifying the ESL. Therefore, Patent Document 1 is not a technique for acquiring ESL position information. Accordingly, even in Patent Document 1, information on the installation position of the product display shelf in the store and the installation position of the ESL installed on the product display shelf is grasped in advance, and information is sent to the electronic shelf label management server based on the grasped information. There is a problem that it takes a lot of time and effort.

  Moreover, the technique described in Patent Document 2 specifies the position of the product based on the order of reading the product codes by determining the order of reading the product codes in advance. However, the product location information specified here only identifies the product displayed in the same product display shelf, and in the technology for acquiring the information on the display position of the product in the product display shelf. Absent. Of course, it is not possible to obtain information about the number of items displayed on the item display shelf. In addition, for example, when there is a change in the displayed product on the product display shelf or a change in the product display position in the product display shelf, even if this is a change of one product, the product code on the product display shelf Has to be read again in a predetermined order, and there is a problem that workability is very poor.

  Moreover, the technique described in Patent Document 3 requires a detection unit to be installed on the merchandise display shelf, which complicates the system. In addition, since the ESL position information is calculated based on the detection result of the detection unit installed on the merchandise display shelf, the data processing for obtaining the ESL position information is complicated. There is a problem in that information about the height of whether it is displayed cannot be detected with high accuracy.

  The present invention has been made on the basis of the above problem recognition, and automatically records position information in a specific direction of the information display means, for example, information display means, without previously recording the position information of the information display means. It is an object of the present invention to provide a position information acquisition device and a position information acquisition method that can acquire information on the height at which the camera is installed with high accuracy.

  In order to solve the above-described problems, a position information acquisition apparatus according to the present invention includes an information detection unit that detects identification information used for identification of an information display unit that displays information for identifying an article, and a reference coordinate set in advance. The identification information is detected by the information detection means based on the coordinate detection means for detecting the coordinates when the identification information is detected by the information detection means, the reference coordinates, and the coordinates detected by the coordinate detection means. Detecting the distance between the position information calculating means for calculating the position information when the position is detected and a predetermined reference location, and based on the detected distance, the identification calculated by the position information calculating means And position information correction means for correcting position information in a specific direction when information is detected.

  Further, the information detection means of the present invention further detects coordinate identification information from an object placed at a predetermined location, and the coordinate detection means further associates in advance with the coordinate identification information detected by the information detection means. The absolute coordinates are set as the reference coordinates.

  Further, the coordinate detection means of the present invention includes an acceleration sensor that detects an acceleration when the position information acquisition device moves, and an angle sensor that detects an angle when the direction of the position information acquisition device changes. And the position information correcting means includes a distance sensor that detects a distance between the position information acquisition device and a predetermined reference location, and is output from the acceleration sensor when the reference coordinates are set. The acceleration detection value and the angle detection value output from the angle sensor are initialized, and the acceleration detection value output from the acceleration sensor that is output until the identification information is detected by the information detection means, Based on the detected angle value from the angle sensor, the moving distance of the position information acquisition device from when the reference coordinates are set to when the identification information is detected is calculated, Based on the detected distance value from the distance sensor output when the identification information is detected by the information detection means, the calculated movement distance of the position information acquisition device is corrected, and the corrected movement distance is used. Then, the coordinates when the position information acquisition device detects the identification information are calculated as relative coordinates with respect to the reference coordinates.

  Further, the acceleration sensor of the present invention detects triaxial acceleration and outputs detection values of the detected triaxial acceleration, and the angle sensor detects triaxial angles, The detected values of the detected three-axis angles are output, and the coordinate detecting means outputs the three-axis accelerations output from the acceleration sensor based on the detected three-axis angle values output from the angle sensor. And the three-axis movement distance of the position information acquisition device is calculated based on the corrected three-axis acceleration detection value, and the distance sensor is configured to specify a specific direction of a predetermined reference location. The position information correction means outputs a movement distance in a specific direction detected by the distance sensor, among the three-axis movement distances calculated by the coordinate detection means, by the distance sensor. Detected distance and difference Instead, the movement distance after the presumed dead, switch the movement distance of the three axes of the corrected of the positional information acquisition device, and wherein the.

  Further, the position information correction unit of the present invention detects the distance in the height direction of the position information acquisition device, and the position information calculation unit calculates the movement distance of the three axes calculated by the coordinate detection unit. The height information when the identification information is detected is corrected.

  Further, the information display means of the present invention is an electronic shelf label that displays information for identifying the article, and the information detection means detects device identification information associated with the electronic shelf label as the identification information. It is characterized by.

  In the position information acquisition method according to the present invention, the information detection procedure for detecting the identification information used for the identification of the information display means for displaying the information for identifying the article by the information detection means, and the coordinate detection means are preset. A coordinate detection procedure for detecting coordinates when the identification information is detected by the information detection means with respect to the reference coordinates, and position information calculation means based on the reference coordinates and the coordinates detected by the coordinate detection means. A position information calculating procedure for calculating position information when the identification information is detected by the information detecting means, and a position information correcting means for detecting a distance from a predetermined reference location, A position information correction procedure for correcting position information in a specific direction when the identification information calculated by the position information calculation means is detected based on a distance; And wherein the Mukoto.

  According to the present invention, it is possible to automatically obtain the position information of the information display unit in a specific direction with high accuracy without recording the position information of the information display unit in advance.

1 is a block diagram illustrating a schematic configuration of a system using a position information acquisition apparatus according to an embodiment of the present invention. It is the block diagram which showed schematic structure of ESL in embodiment of this invention. It is the figure which showed an example of the outline appearance and display of ESL in the embodiment of the present invention. It is the block diagram which showed schematic structure of the portable terminal device in embodiment of this invention. It is the figure which showed schematic structure of the portable terminal device in embodiment of this invention. It is the figure which showed an example of arrangement | positioning and a coordinate of the merchandise display shelf in the store in embodiment of this invention. It is the figure which showed an example of arrangement | positioning of ESL in embodiment of this invention. It is the figure which showed an example of the shelf position coordinate table in embodiment of this invention. It is a figure explaining the method of reading the information of the position of the goods display shelf in embodiment of this invention. It is the flowchart which showed the whole process sequence which acquires the positional information on ESL in embodiment of this invention. It is the flowchart which showed the process sequence which calculates the positional information on ESL in embodiment of this invention. It is the figure which showed an example in the case of acquiring the positional information on ESL in embodiment of this invention. It is a figure explaining the processing method of the sensor detection value of the portable terminal device in embodiment of this invention. It is a figure explaining the method of the correction process of the sensor detection value according to the attitude | position of the portable terminal device in embodiment of this invention. It is a figure explaining the method of the correction process of the sensor detection value according to the attitude | position of the portable terminal device in embodiment of this invention. It is a figure explaining the method of the correction process of the sensor detection value according to the attitude | position of the portable terminal device in embodiment of this invention. It is the figure which showed an example in the case of correct | amending the movement distance of a portable terminal device in embodiment of this invention. It is the figure which showed an example in the case of correct | amending the movement distance of a portable terminal device in embodiment of this invention. It is a figure explaining the processing method of the sensor detection value of the portable terminal device in embodiment of this invention. It is the figure which showed an example in the case of correct | amending the positional information on ESL in embodiment of this invention. It is the figure which showed an example of the shelf label position table in embodiment of this invention. It is a figure explaining an example in the case of link | linking the positional information on ESL, and the information of goods in embodiment of this invention. It is the flowchart which showed the process sequence which acquires ESL and the information of goods in embodiment of this invention. It is the figure which showed an example of the goods link information table in embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a store system including an electronic shelf label system using the position information acquisition apparatus according to the present embodiment. In FIG. 1, the store system 1 includes an in-store system 10 and a backyard system 20.

  The backyard system 20 is a product management system that manages the inventory, price, and the like of products that are displayed and sold in the store in the store's backyard. The backyard system 20 includes a store server 200 that manages the inventory and price of products sold in the store, and an electronic shelf label management server 210 that manages display of the price of the products sold in the store. .

  The in-store system 10 is an in-store system displaying products to be sold. The in-store system 10 includes a point-of-sale (POS) system register (hereinafter referred to as “POS register”) 100 that manages information on purchased products, a wireless LAN access point 110, a repeater 120, an ESL 130, The portable terminal device 140 and the shelf barcode device 150 are configured.

  In the store system 1 shown in FIG. 1, the store server 200 of the backyard system 20 and the POS register 100 of the in-store system 10 are connected by connection means such as a network. The store server 200 and the POS register 100 manage product sales data by transmitting data to each other via this connection means. For example, when a product is purchased, the POS cash register 100 transmits product information such as a product code (bar code) of the purchased product to the store server 200. The store server 200 transmits product price information such as the price of the product to the POS register 100 based on the product information received from the POS register 100. The POS cash register 100 displays the price of the product based on the product price information received from the store server 200, and displays the total price with the price of other purchased products. Note that data transmission between the POS cash register 100 and the store server 200 is not directly related to the present invention, and thus detailed description thereof is omitted. Further, in the present invention, there is no provision regarding a method for selling products at a store such as the configuration of the POS cash register 100 or the store server 200.

  The electronic shelf label management server 210 manages display of the ESL 130 and position information of the ESL 130 in the store. The electronic shelf label management server 210 is connected to the store server 200 by connection means such as a network. The electronic shelf label management server 210 is connected to the wireless LAN access point 110 of the in-store system 10 by a connection means such as a network. The electronic shelf label management server 210 transmits the product information recorded in the store server 200 to the wireless LAN access point 110 of the in-store system 10 via this connection means. In addition, the data request from the in-store system 10 transmitted via the wireless LAN access point 110 is transmitted to the store server 200. Moreover, the data regarding the positional information on the ESL 130 sent from the in-store system 10 is recorded. In the present invention, the communication method between the electronic shelf label management server 210 and the store server 200 or the wireless LAN access point 110 is not defined. FIG. 1 shows an example in which the electronic shelf label management server 210 and the store server 200 are configured as separate servers. However, the electronic shelf label management server 210 and the store server 200 are configured as the same server. These can be different functions that operate on the same server.

  The wireless LAN access point 110 is connected to a repeater 120 disposed in the store by wireless communication means such as a wireless LAN. The wireless LAN access point 110 transmits the product information transmitted from the electronic shelf label management server 210 to each repeater 120. The wireless LAN access point 110 receives a data request transmitted from each repeater 120 and transmits it to the electronic shelf label management server 210. FIG. 1 shows an example in which one wireless LAN access point 110 is placed in a store and communicates with two repeaters 120. A plurality of wireless LAN access points 110 may be arranged in the store. Further, in the present invention, there is no regulation regarding a communication method between the wireless LAN access point 110 and the repeater 120 or the electronic shelf label management server 210.

  The repeater 120 is connected to the ESL 130 disposed in the store and the mobile terminal device 140 carried by the store clerk (employee) of the store by wireless communication means such as a wireless LAN. The repeater 120 transfers the transmission data transmitted from the wireless LAN access point 110 to the ESL 130 and the mobile terminal device 140 within the communication range. Further, the repeater 120 receives a data request transmitted from the ESL 130 or the mobile terminal device 140 and transfers it to the wireless LAN access point 110. In addition, for example, when the communication range of the wireless LAN access point 110 covers all areas in the store, depending on the communication range of the wireless LAN access point 110, the in-store system 10 may be configured without installing the repeater 120. You can also. Further, a plurality of repeaters 120 may be arranged in the store according to the communication range of the wireless communication. FIG. 1 shows an example in which two repeaters 120 are arranged in a store and each repeater 120 communicates with two ESLs 130. In the present invention, the communication method between the repeater 120 and the ESL 130 or the mobile terminal device 140 is not defined.

  The ESL 130 is an information display device including a display unit that displays product information such as the price of a product displayed on a product display shelf (not shown) disposed in the store. In the ESL 130, the product information displayed on the display unit of the ESL 130 is changed based on the transmission data transmitted from the repeater 120. FIG. 1 shows an example in which one repeater 120 and two ESLs 130 communicate with each other, but the present invention does not define the number of ESLs 130 that communicate with one repeater 120. Also, there is no provision regarding the communication method between the repeater 120 and the ESL 130. The configuration of the ESL 130 will be described later.

The mobile terminal device 140 is a position information acquisition device of the present invention that can be carried by a store clerk and confirmed by the store clerk by communicating with the repeater 120. When the store clerk operates the portable terminal device 140, the barcode reading unit provided in the portable terminal device 140 reads the shelf label code (barcode) given to the ESL 130 individually. Information on the shelf label code read by the mobile terminal device 140 is transmitted to the electronic shelf label management server 210 via the repeater 120 and the wireless LAN access point 110. Upon receiving the shelf label code, the electronic shelf label management server 210 transmits information on the product linked to the shelf label code to the mobile terminal device 140 via the wireless LAN access point 110 and the repeater 120. The mobile terminal device 140 that has received the product information displays the received product information on a display unit included in the mobile terminal device 140. In this way, the store clerk can check the information on the product displayed on the mobile terminal device 140.
In the store system 1 of this embodiment, the electronic shelf label management server 210, the wireless LAN access point 110, the repeater 120, the ESL 130, and the mobile terminal device 140 constitute an electronic shelf label system. The configuration of the mobile terminal device 140 will be described later.

  Further, when acquiring the position information of the ESL 130, the mobile terminal device 140 reads the shelf position identification information individually given to the shelf barcode device 150 by the operation of the store clerk, and the read shelf position identification information is The information is transmitted to the electronic shelf label management server 210 in the same manner as the shelf label code information of the ESL 130. A method for acquiring the position information of the ESL 130 based on the transmitted shelf position identification information will be described later.

  The shelf barcode device 150 is, for example, a tag that is installed on a product display shelf installed in a store and displays a reference position of a product display shelf used when the mobile terminal device 140 acquires position information of the ESL 130. . The shelf barcode device 150 displays individually assigned shelf position identification information, and this shelf position identification information is associated with information (absolute coordinates) of the installation position of the shelf barcode device 150 in the store. ing. When the store clerk obtains the position information of the ESL 130, first, the shelf position identification information displayed on the shelf barcode device 150 is read by the barcode reading unit provided in the portable terminal device 140, whereby the shelf bar is displayed. Information on the position where the code device 150 is installed is acquired. Thereby, the electronic shelf label management server 210 can acquire information on absolute coordinates in the store of the product display shelf on which the shelf barcode device 150 is installed. FIG. 1 shows an example in which the shelf barcode device 150 installed on the merchandise display shelf is a reference position used when acquiring position information of the ESL 130 surrounded by a two-dot chain line. The configuration of the shelf barcode device 150 will be described later.

  Next, the electronic shelf label of the electronic shelf label system in the store system 1 of the present embodiment will be described. FIG. 2 is a block diagram showing a schematic configuration of the ESL 130 in the present embodiment. 2, the ESL 130 includes a CPU (Central Processing Unit) 131, a memory 132, an LCD (Liquid Crystal Display) display unit 133, and a wireless communication unit 134. The CPU 131, the memory 132, the LCD display unit 133, and the wireless communication unit 134 are connected to each other via a bus in the ESL 130. FIG. 3 is a diagram showing an example of a schematic appearance and display of the ESL 130 in the present embodiment. In FIG. 3, a label of a shelf label code 135 on which individually provided shelf label identification information (barcode) is written is attached to the ESL 130. The shelf label code 135 in the present embodiment is a label on which shelf label identification information (barcode) is described. However, in the present invention, the form of the shelf label code 135 is not specified. For example, the shelf label code 135 can be printed on the ESL 130.

The CPU 131 is a central processing unit that controls the operation of the ESL 130. The CPU 131 controls the operation of the ESL 130 by reading and executing a program stored in the memory 132.
The memory 132 is a semiconductor memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The memory 132 is a program executed by the CPU 131, a shelf label code 135 given individually to the ESL 130, or the shelf label code 135. Store the corresponding data. Also, product information such as product name and price displayed on the LCD display unit 133 is stored. The memory 132 is also used as a storage area for temporarily storing data during execution of the program by the CPU 131.
The LCD display unit 133 displays product information such as product names and prices stored in the memory 132. For example, as shown in FIG. 3, product information such as the product manufacturer, product name, content, and price is displayed.
Based on the control from the CPU 131, the wireless communication unit 134 communicates with the repeater 120 and receives product information such as product names and prices displayed on the LCD display unit 133.

  Next, the portable terminal device of the electronic shelf label system in the store system 1 of this embodiment will be described. FIG. 4 is a block diagram illustrating a schematic configuration of the mobile terminal device 140 according to the present embodiment. 4, the mobile terminal device 140 includes a CPU 141, a memory 142, an LCD display unit 143, a wireless communication unit 144, a barcode reading unit 145, a sensor unit 146, and an ultrasonic sensor unit 147. The CPU 141, the memory 142, the LCD display unit 143, the wireless communication unit 144, the barcode reading unit 145, the sensor unit 146, and the ultrasonic sensor unit 147 are mutually connected via a bus in the mobile terminal device 140. It is connected to the.

  FIG. 5 is a diagram illustrating an example of a schematic structure of the mobile terminal device 140 in the present embodiment. In FIG. 5, the sensor unit 146 and the ultrasonic sensor unit 147 are arranged on the circuit board of the mobile terminal device 140. FIG. 5 shows an example in which the sensor unit 146 is arranged on the upper surface of the circuit board and the ultrasonic sensor unit 147 is arranged on the lower surface of the circuit board. In addition, the barcode reading unit 145 is disposed at the tip of the mobile terminal device 140.

  In this embodiment, the sensor unit 146 is disposed on the upper surface of the circuit board, the ultrasonic sensor unit 147 is disposed on the lower surface of the circuit board, and the barcode reading unit 145 is disposed on the distal end portion of the portable terminal device 140. Although an example is shown, the arrangement of the sensor unit 146, the ultrasonic sensor unit 147, and the barcode reading unit 145 is not limited to the arrangement shown in FIG. 5, and the sensor unit 146 and the ultrasonic sensor unit described later. As long as the functions of 147 and the barcode reading unit 145 can be realized. Therefore, in the present invention, the arrangement of the sensor unit 146, the ultrasonic sensor unit 147, and the barcode reading unit 145 is not defined.

The CPU 141 is a central processing unit that controls the operation of the mobile terminal device 140. The CPU 141 controls the operation of the mobile terminal device 140 by reading and executing the program stored in the memory 142.
The memory 142 is a semiconductor memory such as a ROM or a RAM, and stores a program executed by the CPU 141, the read shelf label code 135 of the ESL 130, and data corresponding to the shelf label code 135. Further, the product information such as the product name and price received by the wireless communication unit 144, the product management information such as the stock of the product, and the product information notified to the store clerk by being displayed on the LCD display unit 143 are stored. The memory 132 is also used as a storage area for temporarily storing data during execution of the program by the CPU 131.
The LCD display unit 143 displays product information to be notified to the store clerk stored in the memory 142.
Based on the control from the CPU 141, the wireless communication unit 144 communicates with the repeater 120, and transmits information regarding the read shelf label code 135 of the ESL 130. In addition, the wireless communication unit 144 receives product information that is transmitted from the repeater 120 and is displayed on the LCD display unit 143 to inform the store clerk.

The barcode reading unit 145 reads the shelf label code 135 individually given to the ESL 130 or the product code (barcode) given to the product, and relays the read barcode information via the wireless communication unit 144. 120. Further, the barcode information read by the barcode reading unit 145 is also stored in the memory 142.
Further, the barcode reading unit 145 reads the shelf position identification information individually given to the shelf barcode device 150 when acquiring the position information of the ESL 130.

  The sensor unit 146 detects the movement of the mobile terminal device 140. The sensor unit 146 includes an acceleration sensor and a gyro sensor (not shown). The acceleration sensor detects acceleration when the mobile terminal device 140 moves, and the gyro sensor detects angular velocity when the mobile terminal device 140 moves.

  When the mobile terminal device 140 reads the shelf label code 135 individually given to the ESL 130, the ultrasonic sensor unit 147 transmits ultrasonic waves from the ultrasonic transmission / reception unit 1471 to the floor in the store where the merchandise display shelf is arranged. The reflected wave reflected from the floor surface is detected by the ultrasonic transmission / reception unit 1471. Thereby, the distance between the floor surface and the ESL 130, that is, the height from the floor surface to the ESL 130 can be detected.

  The CPU 141 of the mobile terminal device 140 calculates the moving distance of the mobile terminal device 140 based on the acceleration and angular velocity of the mobile terminal device 140 detected by the acceleration sensor and the gyro sensor in the sensor unit 146. The CPU 141 calculates position information of the ESL 130 based on the calculated moving distance. Further, the CPU 141 calculates the distance between the floor surface and the ESL 130 based on the time from when the ultrasonic sensor unit 147 transmits the ultrasonic wave to the time when the reflected wave is detected, and the calculated distance is the floor surface. To ESL130. Further, the CPU 141 stores the calculated position information of the ESL 130 and the height information of the ESL 130 in the memory 142 and transmits the information to the electronic shelf label management server 210 via the communication unit 144.

The CPU 141 corrects the calculated position information of the ESL 130 based on the calculated height information of the ESL 130, stores the corrected position information of the ESL 130 in the memory 142, and manages the electronic shelf label via the communication unit 144. Send to server 210.
A calculation method for calculating the movement distance from the detection value by the acceleration sensor and the gyro sensor and a calculation method for calculating the height information from the transmission of the ultrasonic wave by the ultrasonic sensor unit 147 and the detection of the reflected wave will be described later. . A method for calculating the position information of the ESL 130 based on the calculated movement distance and height information will also be described later.

Next, the arrangement of ESL stores that acquire position information will be described. FIG. 6 is a diagram showing an example of the arrangement of the merchandise display shelves on which the ESL 130 for obtaining the position information is installed in the store. In the store shown in FIG. 6, merchandise display shelves 300-1 to 300-3 (hereinafter, collectively referred to as “product display shelves 300”) are arranged. In addition, a shelf barcode device 150 is arranged on each product display shelf 300. In FIG. 6, the wireless LAN access point 110, the wireless communication means such as the repeater 120, and the POS register 100 shown in FIG. 1 are not shown because they are not directly related to the present invention.
FIG. 7 is a diagram illustrating an example of the arrangement of the ESL 130 in the merchandise display shelf 300-1. ESL130-1 to ESL130-13 are arranged on the merchandise display shelf 300-1 shown in FIG.

FIG. 6 shows an example of coordinates of the shelf barcode device 150 in the store. FIG. 7 shows an example of coordinates of the shelf barcode device 150 in the commodity display shelf 300-1.
In FIG. 6, the right direction is the X-axis direction, the upward direction is the Y-axis direction, and the vertical direction (front direction in FIG. 6) is the Z-axis direction. In FIG. 7, the right direction is the X-axis direction, the upward direction is the Z-axis direction, and the vertical direction (depth direction in FIG. 7) is the Y-axis direction. The X, Y, and Z axes are used as reference absolute coordinate axes in the store.
6 and 7, the coordinates at the floor surface position of the point A shown in FIG. 6 are the reference coordinates (reference coordinates (X, Y, Z) = (0, 0, 0)). In the following description, absolute coordinates are represented by capital letters “X”, “Y”, and “Z”.

  In addition, as shown in FIG. 6, the shelf barcode device 150 installed in each merchandise display shelf 300 has a shelf barcode coordinate indicating the installed position, which is an absolute coordinate according to the distance from the point A. Is set as For example, the shelf barcode coordinates of the shelf barcode device 150 installed in the commodity display shelf 300-1 include absolute coordinates (shelf barcode coordinates (X1, Y1, X1) corresponding to the distances X1, Y1, and Z1 from the point A. Z1)) is set. In FIG. 6, the relationship between the distances X1 and Y1 from the point A and the shelf barcode coordinates can be understood. Moreover, in FIG. 7, the relationship between the distance Z1 from the point A of the shelf barcode device 150 installed in the commodity display shelf 300-1 and the shelf barcode coordinates can be understood. The shelf barcode coordinates are associated with the shelf position identification information individually given to the shelf barcode device 150, and as the location information of the shelf barcode device 150, together with the management information of the commodity display shelf 300-1, the shelf position It is recorded in the electronic shelf label management server 210 as a coordinate table.

Further, as shown in FIG. 7, the absolute coordinates of the product display shelf 300-1 on the surface (hereinafter referred to as “surface”) on which the shelf barcode device 150 is installed are the shelf table coordinates (shelf table coordinates (Xf , Yf, Zf)). The shelf table coordinates are obtained by setting the coordinates of the position of the lower left corner when the surface of the product display shelf 300-1 is viewed from the front as absolute coordinates according to the distance from the point A.
Further, as shown in FIG. 6, the absolute coordinates of the product display shelf 300-1 on the surface opposite to the surface on which the shelf barcode device 150 is installed (hereinafter referred to as “back surface”) The back coordinates (Xb, Yb, Zb)) are set. The shelf back coordinates are obtained by setting the coordinates of the position of the upper left corner when the back surface of the product display shelf 300-1 is viewed from the front as absolute coordinates according to the distance from the point A.
The shelf table coordinates and the shelf back coordinates are recorded in the shelf position coordinate table in the electronic shelf label management server 210 in association with the management information of the product display shelf 300-1.

  In addition, regarding the shelf table coordinates and the shelf back coordinates described above, the following can also be performed. For example, coordinates based on a distance corresponding to the size of the commodity display shelf 300-1 can be calculated from the shelf table coordinates and set as shelf back coordinates. Further, for example, when another shelf barcode device 150 is installed on the back surface of the product display shelf 300-1, the shelf barcode coordinates of the shelf barcode device 150 on the front surface of the product display shelf 300-1 are set as the shelf table coordinates. The shelf barcode coordinates of the shelf barcode device 150 on the back surface of the commodity display shelf 300-1 are used as the shelf back coordinates, so that the shelf table coordinates and the shelf back coordinates can be used instead.

  FIG. 8 is a diagram showing an example of the shelf position coordinate table recorded in the electronic shelf label management server 210 in the present embodiment. The shelf position coordinate table shown in FIG. 8 is installed on the product display shelf 300, the shelf size that is management information of the product display shelf 300, the shelf table coordinates and the shelf back coordinates that are absolute coordinates of the product display shelf 300, and the product display shelf 300. The shelf barcode coordinate of the shelf barcode device 150 is an information table associated with the product display shelf 300.

  Next, a method for reading the shelf position identification information will be described. FIG. 9 is a diagram for explaining a method of reading information on absolute coordinates of a merchandise display shelf in the store by the mobile terminal device 140 of the present embodiment. FIG. 9A shows an example of a schematic structure of the shelf barcode device 150, and FIG. 9B shows an example of a schematic structure of the distal end portion of the mobile terminal device 140 that reads the barcode. FIG. 9C shows a method for reading the shelf position identification information displayed on the shelf barcode device 150 by the mobile terminal device 140.

As shown in FIG. 9A, the shelf barcode 151 in which the shelf position identification information (barcode) individually given to the shelf barcode device 150 is described in the central portion of the shelf barcode device 150. The label is affixed. The shelf barcode 151 in the present embodiment is a label on which shelf position identification information (barcode) is described. However, in the present invention, the form of the shelf barcode 151 is not specified. For example, the shelf barcode 151 can be printed on the shelf barcode device 150.
As shown in FIG. 9A, the left and right ends of the shelf barcode device 150 are provided with a fitting portion 152 and a fitting portion 153. The fitting portion 152 and the fitting portion 153 have, for example, a convex shape, and the position when the shelf barcode 151 is read is always a fixed position together with the structure of the distal end portion of the mobile terminal device 140 described later. To suit.

As shown in FIG. 9B, a barcode reading unit 145 is disposed at the center of the tip of the mobile terminal device 140, and the shelf barcode 151 attached to the shelf barcode device 150. Read.
Further, as shown in FIG. 9B, a fitting portion 148 and a fitting portion 149 are provided at the left and right ends of the distal end portion of the mobile terminal device 140. The fitting portion 148 and the fitting portion 149 have, for example, a concave shape, and when the shelf barcode 151 is read together with the structure of the fitting portion 152 and the fitting portion 153 of the shelf barcode device 150. The position is always adjusted to a certain position.

  When reading the shelf barcode 151 attached to the shelf barcode device 150 by the portable terminal device 140, as shown in FIG. 9C, the fitting portion 152 and the fitting portion 153 of the shelf barcode device 150 are provided. And the fitting part 148 and the fitting part 149 of the portable terminal device 140 are fitted. Thereby, the attitude | position of the portable terminal device 140 when the barcode reading part 145 in the portable terminal device 140 reads the shelf barcode 151 can always be kept constant.

  When the barcode reading unit 145 reads the shelf barcode 151, the acceleration value output by the acceleration sensor in the sensor unit 146 of the mobile terminal device 140 and the angular velocity value output by the gyro sensor are initialized. . Thereafter, the mobile terminal device 140 calculates the position information of the ESL 130 based on the acceleration and the angular velocity when the shelf label code 135 is read in order to acquire the position information of the ESL 130. It should be noted that the acceleration and angular velocity when the barcode reading unit 145 reads the shelf barcode 151 are set as initial values, and the initial value and the acceleration and angular velocity when the portable terminal device 140 reads the shelf label code 135 thereafter are The position information of the ESL 130 can be calculated based on the above.

Further, when the shelf barcode device 150 is installed on the commodity display shelf 300, the x axis, the y axis, and the z axis that are the detection axes of the acceleration sensor and the gyro sensor shown in FIG. It is desirable that the X axis, the Y axis, and the Z axis that are coordinate axes are in the same direction. Thereby, the relative relationship in the axial direction of the relative coordinates (x, y, z) of the acceleration sensor and the gyro sensor with respect to the axial direction of the reference coordinates (X, Y, Z) can be fixed in a certain direction. In the following description, relative coordinates are represented by lowercase letters “x”, “y”, and “z”.
In the following description of the present embodiment, the sensor detection axis (x axis, y axis, and z axis) and the reference absolute coordinate axis (X axis, Y axis, and Z axis) are assumed to be in the same direction. I do.

  Further, when the barcode reading unit 145 reads the shelf barcode 151, the ultrasonic sensor unit 147 of the mobile terminal device 140 can correct the information on the height at which the shelf barcode device 150 is installed. That is, an error between the height value at which the shelf barcode device 150 that is known in advance is installed and the height value detected by the mobile terminal device 140 is confirmed. Thereby, the accuracy of the detection value of the height when the portable terminal device 140 reads the shelf label code 135 for acquiring the position information of the ESL 130 can be improved. The height value when the barcode reading unit 145 reads the shelf barcode 151 is set as an initial value, and this initial value and the height when the portable terminal device 140 reads the shelf label code 135 thereafter are set. The height information of the ESL 130 can be calculated based on the detection value.

  In FIG. 9, as a method for keeping the posture of the mobile terminal device 140 always constant, the convex fitting portion 152 and the fitting portion 153 provided in the shelf barcode device 150 and the concave shape provided in the mobile terminal device 140. Although the method of fitting the fitting part 148 and the fitting part 149 to each other has been shown, the present invention does not define a method for keeping the posture of the portable terminal device 140 constant. For example, permanent magnets are provided at the positions of the fitting portion 152 and the fitting portion 153 provided in the shelf barcode device 150 and the positions of the fitting portion 148 and the fitting portion 149 provided in the mobile terminal device 140, and the shelf bar is provided. When the cord device 150 and the mobile terminal device 140 approach each other, the shelf bar code device 150 and the mobile terminal device 140 are brought into contact with each other using the force with which the respective permanent magnets are attracted, whereby the attitude of the mobile terminal device 140 is It can also be set as the structure which keeps constant.

  Next, a method for acquiring position information of the ESL 130 will be described. FIG. 10 is a flowchart showing an overall processing procedure for acquiring the position information of the ESL 130 in the mobile terminal device 140 of this embodiment. FIG. 11 is a flowchart showing a processing procedure for calculating the position information of the ESL 130 by the mobile terminal device 140 of this embodiment. FIG. 12 is a diagram illustrating an example in which the position information of the ESL 130 is acquired in the arrangement of the ESL 130 of the commodity display shelf 300-1 illustrated in FIG.

The overall processing procedure for acquiring the position information of the ESL 130 is as follows.
First, in step S100, the mobile terminal device 140 checks whether or not the position acquisition mode is selected as the operation mode. If the position acquisition mode is selected, the process proceeds to step S110. Note that the selection of the operation mode of the mobile terminal device 140 is performed by the operation of a store clerk carrying the mobile terminal device 140, but in the present invention, the rules regarding the method of selecting the operation mode of the mobile terminal device 140 I do not.

  If the position acquisition mode is not selected in step S100, step S100 is repeated. When the position acquisition mode is not selected as the operation mode of the mobile terminal device 140, the mobile terminal device 140 performs an operation in an operation mode other than the position acquisition mode. However, in the present invention, the operation other than the position acquisition mode is performed. There is no provision for. Further, the process transition to step S100 during the operation other than the position acquisition mode repeats step S100 by executing step S100 at a predetermined time interval during the operation other than the position acquisition mode, for example. In the present invention, the transition to the process to step S100 during the operation other than the position acquisition mode is not specified.

  In step S <b> 110, the mobile terminal device 140 confirms whether or not the shelf barcode 151 attached to the shelf barcode device 150 has been read by the barcode reader 145 in the mobile terminal device 140. If the shelf barcode 151 has been read, the process proceeds to step S120. In step S120, the mobile terminal device 140 initializes the output value of the sensor unit 146 when the shelf barcode 151 is read, and starts detection by the sensor unit 146. More specifically, the integrated value of the acceleration value output from the acceleration sensor in the sensor unit 146, the integrated value of the angular velocity value output from the gyro sensor, and the detection time by the acceleration sensor and the gyro sensor are set to “0”. Then, integration of the acceleration value output from the acceleration sensor and the angular velocity value output from the gyro sensor is started.

Note that the reading of the shelf barcode 151 by the portable terminal device 140 is performed by the operation of a store clerk carrying the portable terminal device 140. In the present invention, the reading of the shelf barcode 151 by the portable terminal device 140 is performed. There is no provision for the operation method.
In step S <b> 120, the mobile terminal device 140 may acquire the height information when the shelf barcode 151 is read by the ultrasonic sensor unit 147.

  If the shelf barcode 151 has not been read in step S110, step S110 is repeated. Note that the repetition of step S110 can be a process of repeating step S110, for example, by executing step S110 at a predetermined time interval. Further, for example, as shown in FIG. 9C, the fitting portion 152 and the fitting portion 153 of the shelf barcode device 150 are fitted to the fitting portion 148 and the fitting portion 149 of the mobile terminal device 140. As a result, when it is detected that the attitude of the mobile terminal device 140 is kept constant, or reading of the shelf barcode 151 is instructed by a store clerk operation with the attitude of the mobile terminal device 140 kept constant. Sometimes, it is possible to confirm the reading of the shelf barcode 151 in step S110. In the present invention, there is no definition regarding the repetitive processing in step S110. Further, there is no provision regarding the instruction method for reading the shelf barcode 151 by the operation of the store clerk.

  After the detection by the sensor unit 146 is started in step S120, in step S130, the portable terminal device 140 has read the shelf label code 135 attached to the ESL 130 by the barcode reading unit 145 in the portable terminal device 140. Confirm whether or not. When the shelf label code 135 is read, the mobile terminal device 140 stores the output value of the sensor unit 146 when the shelf label code 135 is read in the memory 142 in the mobile terminal device 140. Further, when the shelf label code 135 is read, the mobile terminal device 140 transmits an ultrasonic wave from the ultrasonic sensor unit 147 and detects a reflected wave, and detects the time when the ultrasonic wave is transmitted and the reflected wave. The time is stored in the memory 142 in the mobile terminal device 140. Note that the reading of the shelf label code 135 by the portable terminal device 140 is performed by the operation of a store clerk carrying the portable terminal device 140. In the present invention, the reading of the shelf label code 135 by the portable terminal device 140 is performed. There is no provision for the operation method.

  If the shelf label code 135 has not been read in step S130, step S130 is repeated. Note that the repetition of step S130 can be a process of repeating step S130, for example, by executing step S130 at a predetermined time interval. Further, for example, when the reading of the shelf label code 135 is instructed by the operation of the mobile terminal device 140 by the store clerk, the process of confirming the reading of the shelf label code 135 in step S130 may be performed. In the present invention, there is no definition regarding the repetitive processing in step S130. Further, there is no regulation regarding the instruction method for reading the shelf label code 135 by the operation of the store clerk.

  In step S140, the mobile terminal device 140 determines the ESL 130 based on the output value of the sensor unit 146 stored in the memory 142, the time when the ultrasonic sensor unit 147 sends the ultrasonic wave, and the time when the reflected wave is detected. The position information of is calculated.

  In step S140, the mobile terminal device 140 calculates the position information of the ESL 130, and in step S150, the mobile terminal device 140 uses the calculated position information of the ESL 130 and the read information of the shelf label code 135 to the electronic shelf label management server. To 210.

  Subsequently, in step S <b> 160, the mobile terminal device 140 confirms whether or not to read the shelf label code 135 of the next ESL 130. When reading the next shelf label code 135, the process returns to step S 130 to read the shelf label code 135, calculate the position information of the ESL 130, and transmit the calculated position information of the ESL 130 to the electronic shelf label management server 210. repeat. If the next shelf label code 135 is not read, the process is completed.

  The processing procedure for calculating the position information of the ESL 130 is as follows. Since a specific method for calculating the position information of the ESL 130 will be described later, only the process flow when calculating the position information of the ESL 130 will be described here.

First, in step S200, the CPU 141 in the mobile terminal device 140 moves the mobile terminal device 140 based on the acceleration value output by the acceleration sensor in the sensor unit 146 and the angular velocity value output by the gyro sensor. Attitude change information is calculated.
Subsequently, in step S210, the CPU 141 calculates an acceleration component when the mobile terminal device 140 moves, based on the calculated posture change information.
Subsequently, in step S220, the CPU 141 calculates the movement distance of the mobile terminal device 140 based on the calculated acceleration component.
Subsequently, in step S230, the CPU 141 pastes the mobile terminal device 140 to the ESL 130 based on the time when the ultrasonic sensor unit 147 sends out the ultrasonic wave and the time when the ultrasonic sensor unit 147 detects the reflected wave. The distance between the portable terminal device 140 and the floor when the shelf label code 135 is read, that is, the height of the ESL 130 installed on the merchandise display shelf 300 is calculated.
Subsequently, in step S240, the CPU 141 reads the relative coordinates when the mobile terminal device 140 reads the shelf label code 135 attached to the ESL 130 based on the calculated movement distance of the mobile terminal device 140 and the height of the ESL 130. That is, the coordinates of the position where the ESL 130 is arranged on the product display shelf 300 are calculated.

  As described above, the relative coordinates of the position of the ESL 130 are calculated based on the detection values of the acceleration sensor and the gyro sensor, the transmission time of the ultrasonic wave, and the detection time of the reflected wave. The relative coordinates of the ESL 130 include highly accurate height information for the ESL 130 arranged on the merchandise display shelf 300. As a result, the electronic shelf label management server 210 can also accurately obtain information on the level of the product display shelf 300 where the ESL 130 is arranged. Then, the electronic shelf label management server 210 that has received the relative coordinates of the ESL 130 from the mobile terminal device 140 can calculate the absolute coordinates of the acquired ESL 130 based on the absolute coordinates associated with the shelf barcode 151. .

  Note that although the calculation of the coordinates of the ESL 130 in step S240 in FIG. 11 has been described with the configuration performed by the CPU 141 in the mobile terminal device 140, the calculation of the movement distance of the mobile terminal device 140 in step S220 and the mobile terminal device in step S230 The configuration in which the CPU 141 in the mobile terminal device 140 executes the process up to the calculation of the distance between 140 and the floor surface, and transmits the calculated distance between the mobile terminal device 140 and the floor surface to the electronic shelf label management server 210. It can be. In this case, the electronic shelf label management server 210 calculates the relative coordinates of the ESL 130 in the merchandise display shelf 300 and the absolute coordinates of the ESL 130 in the store based on the received movement distance of the mobile terminal device 140 and the distance from the floor surface. Will be.

  Further, when the shelf barcode 151 pasted on the shelf barcode device 150 is read, the shelf barcode coordinates of the shelf barcode device 150 read from the electronic shelf label management server 210 are acquired, and the shelf barcode coordinates are acquired. Based on the above, the CPU 141 in the portable terminal device 140 may be configured to execute the calculation up to the absolute coordinates of the ESL 130. In this case, the electronic shelf label management server 210 only records the relative coordinates of the ESL 130 in the merchandise display shelf 300 received from the mobile terminal device 140 and the absolute coordinates of the ESL 130 in the store.

Here, an example in the case of acquiring ESL130 position information is demonstrated using FIG. FIG. 12 shows an example of acquiring the position information of the ESL 130-5 based on the absolute coordinates of the shelf barcode device 150.
After the detection by the sensor unit 146 is started in step S120 shown in FIG. 10, the store clerk moves the mobile terminal device 140 to the ESL 130-5 along the movement locus B shown in FIG. The attached shelf label code 135 is read. The movement distance of the mobile terminal device 140 to the ESL 130-5 at this time is based on the detection values of the acceleration sensor and the gyro sensor, XE5 in the X-axis direction, YE5 (not shown) in the Y-axis direction, and Z-axis. ZE5 is calculated in the negative direction. Then, based on the calculated moving distance, the relative coordinates of ESL130-5 (ESL130-5 relative coordinates = (XE5, YE5, −ZE5)) can be obtained.

  Thus, based on the shelf barcode coordinates (X1, Y1, Z1) and the ESL130-5 relative coordinates = (XE5, YE5, −ZE5), the absolute coordinates of ESL130-5 (ESL130-5 absolute coordinates = (X1 + XE5) Y1 + YE5, Z1-ZE5)) can be obtained.

  In addition, the distance between the mobile terminal device 140 and the floor when the mobile terminal device 140 reads the shelf label code 135 attached to the ESL 130-5 is the time when the ultrasonic sensor unit 147 sends an ultrasonic wave, The distance ZEs5 between the portable terminal device 140 and the floor surface is calculated based on the time when the reflected ultrasonic wave transmitted by the ultrasonic sensor unit 147 is detected.

  Then, the ESL130-5 absolute coordinate = (X1 + XE5, Y1 + YE5, Z1-ZE5) is replaced with the value of the distance ZEs5 between the mobile terminal device 140 and the floor surface by replacing the value in the Z direction, which is the height direction coordinate. -5 corrected absolute coordinates (ESL130-5 absolute coordinates = (X1 + XE5, Y1 + YE5, ZEs5)) can be obtained.

  Next, a method for calculating the movement distance of the mobile terminal device 140 will be described. FIG. 13 is a diagram for explaining a detection value processing method by the sensor unit 146. FIG. 13A shows a method for processing the acceleration value output from the acceleration sensor in the sensor unit 146, and FIG. 13B shows a method for processing the angular velocity value output by the gyro sensor in the sensor unit 146. Show. 14 to 16 are diagrams illustrating a method for correcting the detection value of the sensor unit 146 detected according to the attitude of the mobile terminal device 140. 15 and 16, the illustration of the ultrasonic sensor unit 147 that is not related to the calculation of the movement distance of the mobile terminal device 140 is omitted.

The moving distance of the mobile terminal device 140 can be obtained by processing the acceleration value output by the acceleration sensor in the sensor unit 146.
As shown in FIG. 13A, when the store clerk moves the mobile terminal device 140, the acceleration sensor in the sensor unit 146 causes the acceleration a (t) [m / sec ² ] accompanying the movement of the mobile terminal device 140. ] Value is output. A velocity v (t) [m / sec] is obtained by integrating the acceleration a (t) once at time t. Further, the distance k (t) [m] can be obtained by integrating the velocity v (t) once at time t. This distance k (t) is the moving distance of the mobile terminal device 140.

  However, in order to obtain the moving distance as shown in FIG. 13A, it is necessary to subtract the gravitational acceleration in consideration of the gravitational acceleration applied to the mobile terminal device 140. Moreover, since the value of the gravitational acceleration differs depending on the posture of the mobile terminal device 140, it is necessary to detect a change in the posture of the mobile terminal device 140.

The change in the attitude of the mobile terminal device 140 can be obtained by processing the value of the angular velocity output from the gyro sensor in the sensor unit 146.
As shown in FIG. 13B, when the store clerk moves the mobile terminal device 140, the gyro sensor in the sensor unit 146 causes the angular velocity Ω (t) [deg / sec] accompanying the movement of the mobile terminal device 140. The value of is output. By integrating the angular velocity Ω (t) once at time t, an angle θ (t) [deg] on the axis shown in FIG. 13C is obtained. This angle θ (t) is the movement angle of the mobile terminal device 140.

And based on this movement angle, the gravitational acceleration concerning each axial direction of the portable terminal device 140 is calculated.
As shown in FIG. 14 (a), a gravitational acceleration ag of 1.0 G is always applied in the Z-axis direction of the mobile terminal device 140, and the acceleration sensor in the sensor unit 146 has a gravitational acceleration ag in the z-axis direction. Is detected. This state is an initial posture when the shelf barcode 151 attached to the shelf barcode device 150 is read by the barcode reading unit 145 in the mobile terminal device 140. For example, a rotation around the X axis as shown in FIG. 14B is accompanied by a hand shake when the store clerk moves the mobile terminal device 140 in order to acquire the position information of the ESL 130 from this initial posture. If there is, the posture of the mobile terminal device 140 is as shown in FIG. At this time, the gravitational acceleration ag detected by the acceleration sensor in the sensor unit 146 includes the following gravitational acceleration component az in the z-axis direction and gravitational acceleration in the y-axis direction according to the rotation angle θx around the X axis. The component agy is detected separately.
z-axis direction: agz = ag × cos θx
y-axis direction: agy = ag × sin θx

Further, as shown in FIG. 15A, from the initial posture in which the acceleration sensor in the sensor unit 146 detects the gravitational acceleration ag in the z-axis direction, for example, with the movement of the mobile terminal device 140 by the store clerk, When there is a rotation around the Y axis as shown in FIG. 15B, the attitude of the mobile terminal device 140 is as shown in FIG. 15C. At this time, the gravitational acceleration ag detected by the acceleration sensor in the sensor unit 146 includes the following gravitational acceleration component az in the z-axis direction and gravitational acceleration in the x-axis direction according to the rotation angle θy about the Y axis. The component agx is detected separately.
z-axis direction: agz = ag × cos θy
x-axis direction: agx = ag × sin θy

  Further, from the attitude of the mobile terminal device 140 as shown in FIG. 16A, for example, rotation around the Z-axis as shown in FIG. If there is, the posture of the mobile terminal device 140 is as shown in FIG. At this time, the acceleration a detected by the acceleration sensor in the sensor unit 146 is detected separately as an acceleration component ax in the x-axis direction and an acceleration component ay in the y-axis direction. The acceleration component ax in the x-axis direction and the acceleration component ay in the y-axis direction are different from the X-axis and Y-axis that are reference absolute coordinate axes in the store. Therefore, as shown in FIG. 16D, the acceleration a detected by the acceleration sensor according to the rotation angle θz around the Z axis is used as the reference absolute coordinate axis component in the store, that is, the acceleration in the X axis direction. Correction is made to the component aX and the acceleration component aY in the Y-axis direction. The corrected acceleration component aX and acceleration component aY are processed by the method shown in FIG. 13A, and the mobile terminal device 140 when the store clerk moves the mobile terminal device 140 in order to acquire the position information of the ESL 130. Is calculated.

  In addition, in the rotation around the X axis shown in FIG. 14 and the rotation around the Y axis shown in FIG. 15, the gravitational acceleration components in the respective axial directions described above are detected by the acceleration sensor and subtracted from the acceleration a. Thus, the acceleration accompanying the movement of the mobile terminal device 140 is calculated. Then, similarly to the idea shown in FIG. 16D, the acceleration obtained by subtracting the gravitational acceleration component is corrected to the reference absolute coordinate axis component in the store according to the rotation angle θx and the rotation angle θy. Thereafter, the moving distance of the mobile terminal device 140 is calculated by processing according to the method shown in FIG.

  Thus, the mobile terminal device 140 calculates the movement distance of the self-portable terminal device 140, and calculates the relative coordinates of the position of the ESL 130 based on the calculated movement distance. In addition, the mobile terminal device 140 stores the calculated relative coordinates of the ESL 130 and the shelf label code 135 of the ESL 130 in the memory 142 in the mobile terminal device 140.

  Note that when the mobile terminal device 140 reads the shelf barcode 151 attached to the shelf barcode device 150, the product display shelf on which the shelf barcode device 150 read from the electronic shelf label management server 210 is installed. When the information regarding the size of 300 (hereinafter referred to as “shelf information”) is acquired, the moving distance of the mobile terminal device 140 can be corrected based on the shelf information. Note that the shelf information acquired by the mobile terminal device 140 is, for example, information on the shelf position coordinate table illustrated in FIG. In the following description, it is assumed that the shelf information acquired by the mobile terminal device 140 is the shelf position coordinate table shown in FIG.

  For example, as illustrated in FIG. 17, when the store clerk moves the mobile terminal device 140 and continuously reads the shelf label codes 135 of the ESL 130-1 to ESL 130-8, the sensor unit 146 of the mobile terminal device 140 In the detection, it is assumed that the result of moving along the locus shown in the movement locus B2 is obtained. As can be seen from FIG. 17, the calculation point E8, which is position information when the shelf label code 135 of the ESL 130-8 is read, is the shelf barcode coordinates (X1, Y1, Z1) in the shelf size in the shelf position coordinate table. ) And the length L which is the distance in the X-axis direction. In such a case, as in the correction R8 shown in FIG. 17, the value in the X direction of the calculation point E8 of the ESL 130-8 is a value within the length L of the product display shelf 300-1 (in FIG. The movement distance of the mobile terminal device 140 is corrected so as to change to the value of the point E8a.

  Also, for example, as shown in FIG. 18, when the store clerk moves the mobile terminal device 140 and continuously reads the shelf label codes 135 of the ESL 130-1, ESL 130-4, ESL 130-9, and ESL 130-12. It is assumed that the detection by the sensor unit 146 of the mobile terminal device 140 has obtained a result of moving along the locus shown in the movement locus B3. As can be seen from FIG. 18, the calculation point E12, which is position information when the shelf label code 135 of the ESL 130-12 is read, is the Z in the shelf barcode coordinates (X1, Y1, Z1) in the shelf position coordinate table. The direction distance value Z1 is exceeded. In such a case, as in the correction R12 shown in FIG. 18, the value in the Z direction of the calculation point E12 of the ESL 130-12 is used as the shelf barcode coordinate of the shelf barcode device 150 installed in the product display shelf 300-1. The movement distance of the mobile terminal device 140 is corrected so as to be changed to a value within Z1 that is the value in the Z direction (the value of the correction point E12a in FIG. 18).

Thus, based on the shelf information acquired from the electronic shelf label management server 210, the calculated movement distance of the mobile terminal device 140 can be corrected.
In addition, when the calculated movement distance of the mobile terminal device 140 exceeds the range of values included in the shelf information acquired from the electronic shelf label management server 210, the movement distance of the mobile terminal device 140 as described above is set. A configuration may be adopted in which the store clerk detects the position information of the ESL 130 again by displaying an error on the LCD display unit 143 of the mobile terminal device 140 without performing correction.

In the correction of the movement distance of the mobile terminal device 140, the determination as to whether or not the calculated movement distance of the mobile terminal device 140 exceeds the range of values included in the shelf information acquired from the electronic shelf label management server 210 is as follows: An arbitrary distance value is set in advance, and it is determined whether or not a calculation result has been obtained that the mobile terminal device 140 has moved beyond the value included in the shelf information to a position separated by the set arbitrary distance value or more. It can also be set as the structure to do.
Further, when the calculated movement distance of the mobile terminal device 140 exceeds the range of values included in the shelf information acquired from the electronic shelf label management server 210, it is said that the distance is not more than the set arbitrary distance value. In the case of the calculation result, the movement distance is corrected as described above, and when the calculation result indicates that the distance is not less than the set arbitrary distance, an error is displayed on the LCD display unit 143 of the mobile terminal device 140, The store clerk may be configured to re-detect the position information of the ESL 130.
In the present invention, a method for determining whether or not the calculated movement distance of the mobile terminal device 140 exceeds the range of values included in the shelf information acquired from the electronic shelf label management server 210, There is no provision for the processing method.

  Next, a method for calculating the distance between the mobile terminal device 140 and the floor will be described. FIG. 19 is a diagram for explaining a detection value processing method by the ultrasonic sensor unit 147. FIG. 19 shows an ultrasonic transmission waveform transmitted by the ultrasonic transmission / reception unit 1471 of the ultrasonic sensor unit 147 and an ultrasonic reception waveform detected by the ultrasonic transmission / reception unit 1471.

The detection of the distance by the ultrasonic sensor unit 147 includes the time Ts from the time Tt when the ultrasonic transmission / reception unit 1471 of the ultrasonic sensor unit 147 transmits the ultrasonic wave S to the time Tr when the reflected wave Sr is detected, It can be calculated based on the ultrasonic propagation time Tp.
More specifically, as illustrated in FIG. 19, when the ultrasonic transmission / reception unit 1471 transmits the ultrasonic wave S at the time Tt, first, the ultrasonic transmission / reception unit 1471 directly transmits the transmitted ultrasonic wave S. A wave Sd is detected. Thereafter, the ultrasonic transmission / reception unit 1471 detects the reflected wave Sr of the ultrasonic wave S transmitted at the timing of time Tr. The ultrasonic sensor unit 147 calculates the time Ts by subtracting the time Tt from the time Tr. For example, when the ultrasonic transmission / reception unit 1471 transmits an ultrasonic wave S having a carrier frequency of 40 [kHz], the propagation time Tp of the ultrasonic wave S is Tp = 331.5 + 0.61 t [m / sec]. is there. Here, t indicates the temperature [° C.] of the measurement space. Note that the temperature t of this measurement space has little influence on the propagation time Tp due to the temperature change, as can be seen from the above-described equation of the propagation time Tp, so that a predetermined temperature (for example, room temperature: 25 [ ° C]). Based on the time Ts and the propagation time Tp, the distance X between the mobile terminal device 140 and the floor surface is calculated by the following equation (1).

    X = Ts / 2 × Tp (1)

  The measurement distance by the ultrasonic wave S having a carrier frequency of 40 [kHz] is 0.1 to several [m], and the measurement resolution is 1 [cm]. Therefore, the distance X between the mobile terminal device 140 and the floor surface can be calculated with high accuracy. The calculated distance X is a height value from the floor surface to the mobile terminal device 140.

  In this way, the mobile terminal device 140 calculates the height from the floor surface to the mobile terminal device 140, and stores the calculated height value in the memory 142 in the mobile terminal device 140. Further, the calculated height value is replaced with the Z-direction value of the relative coordinates of the position of the ESL 130 calculated separately. Further, the mobile terminal device 140 stores the replaced relative coordinates of the ESL 130 (hereinafter referred to as “corrected relative coordinates”) and the shelf label code 135 of the ESL 130 in the memory 142 in the mobile terminal device 140. Then, the stored corrected relative coordinates of the ESL 130 and the shelf label code 135 of the ESL 130 are transmitted to the electronic shelf label management server 210. The electronic shelf label management server 210 that has received the corrected relative coordinates of the ESL 130 from the mobile terminal device 140 calculates the absolute coordinates of the acquired ESL 130 based on the absolute coordinates associated with the shelf barcode 151.

  The mobile terminal device 140 may be configured to transmit the calculated relative coordinates of the ESL 130, the calculated height value, and the shelf label code 135 of the ESL 130 to the electronic shelf label management server 210. In this case, the electronic shelf label management server 210 calculates the corrected relative coordinates of the ESL 130 based on the received relative coordinates of the ESL 130 and the height value, and based on the calculated corrected relative coordinates of the ESL 130. Calculate absolute coordinates of.

  Further, each time the shelf label code 135 of the ESL 130 is read continuously after the shelf barcode 151 is read, the position information of each ESL 130 is corrected based on the calculated height value from the floor surface to the portable terminal device 140 itself. You can also An example of this case will be described with reference to FIG.

In FIG. 20, after reading the shelf bar code 151, the store clerk moves the mobile terminal device 140 to continuously read the shelf label codes 135 of the ESL 130-1 to ESL 130-8. In addition, every time the ESL 130 is detected by the sensor unit 146, the mobile terminal device 140 corrects the position information of the detected ESL 130 based on the height value detected by the ultrasonic sensor unit 147.
The correction of the position information that is performed every time the position information of the ESL 130 is detected is obtained by using the ultrasonic sensor unit 147 to calculate the value in the Z direction of the relative coordinates of the position of the ESL 130 obtained by the detection of the sensor unit 146 of the mobile terminal device 140. Replace with the detected height value. Thereby, for example, as in the correction R8b illustrated in FIG. 20, the position information of the ESL 130-8 is corrected from the calculation point E8b of the ESL 130-8 to the correction point E8c. As described above, each time the position information of the ESL 130 is detected by the mobile terminal device 140, the position information of the detected ESL 130 is corrected, so that the movement locus of the portable terminal device 140 becomes the locus indicated by the movement locus B4.
Thereby, the detection error (cumulative error) of the sensor unit 146 when the ESL 130 is detected by the sensor unit 146 of the mobile terminal device 140 can be reduced.

  FIG. 21 is a diagram showing an example of a shelf label position table recorded in the electronic shelf label management server 210 in the present embodiment. The shelf label position coordinate table shown in FIG. 21 includes a shelf number for identifying the product display shelf 300, a device code for identifying the shelf barcode device 150 and the ESL 130 installed on the product display shelf 300, and the shelf barcode device 150. 2 is an information table in which absolute coordinates and relative coordinates, which are information on the position where the ESL 130 is installed, and correction information indicating whether or not the relative coordinates are corrected are associated with each other.

  In the shelf label position coordinate table shown in FIG. 21, the shelf barcode 151 attached to the shelf barcode device 150 and the shelf label code 135 attached to the ESL 130 are recorded in the device code.

  In the shelf label position coordinate table, the shelf bar code coordinate of the shelf position coordinate table shown in FIG. 8 is recorded as the absolute coordinate of the shelf barcode device 150, and this shelf barcode coordinate is used as the reference coordinate. The relative coordinates of the ESL 130 are recorded with the relative coordinates of the ESL 130 transmitted from the mobile terminal device 140. The absolute coordinates of the ESL 130 are recorded with the absolute coordinates of the ESL 130 calculated from the relative coordinates of the ESL 130 based on the shelf barcode coordinates (absolute coordinates). The relative coordinates of the ESL 130 and the absolute coordinates of the ESL 130 include highly accurate height information with respect to the ESL 130 arranged on the merchandise display shelf 300. As a result, the electronic shelf label management server 210 can accurately obtain information regarding the height, such as the level of the product display shelf 300, at which the ESL 130 is arranged.

  The correction information in the shelf label position coordinate table illustrated in FIG. 21 includes sensor detection axes (x-axis, y-axis) in which the mobile terminal device 140 has corrected the relative coordinates of the ESL 130 transmitted from the mobile terminal device 140. (Axis, z-axis) information is recorded. The information recorded in the correction information is, for example, the movement of the mobile terminal device 140 in a configuration in which the mobile terminal device 140 acquires the shelf information from the electronic shelf label management server 210 as shown in FIGS. This is distance correction information. Further, for example, in the configuration in which the mobile terminal device 140 calculates the relative coordinates of the ESL 130 and the height value to the electronic shelf label management server 210, the electronic shelf label management server 210 calculates the corrected relative coordinates of the ESL 130. It is the correction information recorded in the case. The shelf label position coordinate table illustrated in FIG. 21 illustrates an example in which the z-axis direction correction is performed on the relative coordinates of the ESL 130-12.

  Further, the correction information in the shelf label position coordinate table shown in FIG. 21 is obtained when the portable terminal device 140 corrects the position information of the ESL 130 based on the height value detected by the ultrasonic sensor unit 147. The presence or absence of correction cannot be determined from the relative coordinates of the ESL 130 transmitted from the device 140. In such a case, the information in the tag position coordinate table is corrected by acquiring from the portable terminal device 140 information regarding whether or not the position information of the ESL 130 has been corrected based on the detected height value. Information can be recorded. In the present invention, the correction information acquisition method is not specified.

  Next, a method for acquiring the position information of the ESL 130 when associating the information on the products displayed on the product display shelf 300 with the shelf label code 135 will be described. FIG. 22 is a diagram illustrating an example of linking the ESL 130 and the information of the product 400 when acquiring the position information of the ESL 130 in the arrangement of the ESL 130 of the product display shelf 300-1 illustrated in FIG. is there. FIG. 23 is a flowchart showing a processing procedure for acquiring the position information of the ESL 130 and the information of the product 400 in the mobile terminal device 140 of this embodiment. In FIG. 22, as shown in FIG. 20, in the embodiment where the mobile terminal device 140 corrects the position information of the ESL 130 each time the ESL 130 is detected, the association between the ESL 130 and the information of the product 400 is applied. Will be described.

  FIG. 22 shows the product codes of the products 400-1 to 400-3 associated with each ESL 130 when acquiring the position information of the ESL 130-1 to ESL 130-3 based on the absolute coordinates of the shelf barcode device 150. An example of acquiring (barcode) is shown. The movement locus of the mobile terminal device 140 by the store clerk when acquiring the product codes of the ESL 130-1 to ESL 130-3 and the products 400-1 to 400-3 is a movement locus B5.

  First, the shelf barcode 151 attached to the shelf barcode device 150 is read by the mobile terminal device 140. Subsequently, the shelf label code 135 affixed to the ESL 130-1 is read by the mobile terminal device 140. Here, the mobile terminal device 140 calculates the moving distance of the mobile terminal device 140 based on the detection value of the sensor unit 146 when the shelf label code 135 is read. Subsequently, the mobile terminal device 140 calculates the height from the floor surface to the mobile terminal device 140 based on the detection value of the ultrasonic sensor unit 147. Then, the mobile terminal device 140 reads the shelf label code 135 attached to the ESL 130-1 based on the calculated movement distance of the mobile terminal device 140 and the height from the floor surface to the mobile terminal device 140. Correct the position information. Thereafter, the mobile terminal device 140 reads the product code of the product 400-1 corresponding to the ESL 130-1. Then, the mobile terminal device 140 transmits the corrected ESL 130 position information, shelf label code 135 information, and product code information to the electronic shelf label management server 210. When the mobile terminal device 140 does not correct the position information of the ESL 130 every time the ESL 130 is detected, the position information of the ESL 130 is changed to the corrected position information of the ESL 130 and is calculated based on the calculated movement distance of the mobile terminal device 140. The relative coordinates of the position of the ESL 130 and the calculated height value from the floor surface to the mobile terminal device 140 may be transmitted to the electronic shelf label management server 210.

  Subsequently, the mobile terminal device 140 reads the shelf label code 135 attached to the ESL 130-2, corrects the position information of the ESL 130-2, and reads the product code of the product 400-2 corresponding to the ESL 130-2. . Similarly, the mobile terminal device 140 reads the shelf label code 135 attached to the ESL 130-3, corrects the position information of the ESL 130-3, and reads the product code of the product 400-3 corresponding to the ESL 130-3. .

  In this way, by reading the shelf label code 135 and correcting the position information of the ESL 130, the electronic shelf label management server 210 links the ESL 130 position information and the product information of the product 400. The attached product management data can be acquired.

  Here, a processing procedure in which the mobile terminal device 140 acquires the position information of the ESL 130 and the information of the product 400 will be described. Note that the detailed processing procedure in each step of the flowchart shown in FIG. 23 is the same as in FIG. 10 and FIG. 11, and here, the outline when acquiring the position information of the ESL 130 and the information of the product 400 is shown. Only the flow of processing will be described.

  First, in step S <b> 300, the mobile terminal device 140 reads the shelf barcode 151 attached to the shelf barcode device 150 by the barcode reading unit 145 in the mobile terminal device 140.

  Subsequently, in step S <b> 310, the mobile terminal device 140 reads the shelf label code 135 attached to the ESL 130 by the barcode reading unit 145 in the mobile terminal device 140. Then, the mobile terminal device 140 calculates a moving distance when the mobile terminal device 140 moves based on the acceleration value output by the acceleration sensor in the sensor unit 146 and the angular velocity value output by the gyro sensor. . In addition, the mobile terminal device 140 is the mobile terminal device 140 when the mobile terminal device 140 reads the shelf label code 135 based on the time when the ultrasonic sensor unit 147 transmits the ultrasonic wave and the time when the reflected wave is detected. Calculate the height from the floor. Then, the mobile terminal device 140 calculates the corrected position information of the ESL 130 when the mobile terminal device 140 reads the shelf label code 135 based on the calculated moving distance and the height from the floor surface.

  Subsequently, in step S320, the mobile terminal device 140 reads the product code of the product 400 corresponding to the ESL 130 read in step S310 by the barcode reading unit 145 in the mobile terminal device 140.

  Subsequently, in step S330, the mobile terminal device 140 confirms whether or not to acquire the position information of the next ESL 130. When the position information of the next ESL 130 is not acquired, the process proceeds to step S340. When acquiring the position information of the next ESL 130, the process returns to step S310, and reading of the shelf label code 135, calculation of the position information of the ESL 130, and reading of the product code of the product 400 corresponding to the ESL 130 are repeated.

  In step S340, the mobile terminal device 140 transmits the corrected position information of the ESL 130, the information of the read shelf label code 135, and the information of the read product code to the electronic shelf label management server 210, and completes the processing. .

  Thereafter, in the electronic shelf label management server 210, based on the corrected position information of the ESL 130, the information of the shelf label code 135, and the information of the product code transmitted from the mobile terminal device 140, the ESL 130 position information and the product 400 Record product management data linked to information.

  As described above, when displaying the product 400 on the product display shelf 300, the information of the corrected position where the ESL 130 is installed is acquired simultaneously with the operation of associating the product code of the product 400 with the ESL 130. Can do. The information on the corrected position of the ESL 130 includes accurate height information for the ESL 130 arranged on the merchandise display shelf 300. As a result, the electronic shelf label management server 210 can also accurately acquire information on the level of the product display shelf 300 where the ESL 130 is arranged.

  Note that in the example of linking the ESL 130 and the information of the product 400 shown in FIGS. 22 and 23, the shelf label code 135 previously attached to the ESL 130 is read, and then the product 400 of the product 400 corresponding to the ESL 130 is obtained. Although an example of reading a code has been shown, the present invention is not limited to this order. For example, the product code of the product 400 corresponding to the ESL 130 can be read first, and then the shelf label code 135 attached to the ESL 130 can be read. For example, when it is possible to determine whether the code (bar code) read by the mobile terminal device 140 is the shelf label code 135 or the product code, the shelf label code 135 attached to the ESL 130 The order of reading the product code of the product 400 corresponding to the ESL 130 can be made arbitrary.

  FIG. 24 is a diagram illustrating an example of a product link information table that is product management data recorded in the electronic shelf label management server 210 in the present embodiment. The product link information table shown in FIG. 24 includes a shelf number for identifying the product display shelf 300, a device code for identifying the shelf barcode device 150 and the ESL 130 installed on the product display shelf 300, the shelf barcode device 150, It is an information table in which absolute coordinates and relative coordinates, which are information on a position where the ESL 130 is installed, and a product code and a product name of the product 400 corresponding to the ESL 130 are associated with each other.

  In the product link information table shown in FIG. 24, the information on the shelf label position coordinate table shown in FIG. 21 is recorded in the shelf number, device code, absolute coordinate, and relative coordinate. In addition, in the product code of the product link information table, the product code corresponding to the ESL 130 transmitted together with the position information of the ESL 130 and the shelf label code 135 from the mobile terminal device 140 is recorded. In the product name of the product link information table, the product name corresponding to the product code transmitted from the mobile terminal device 140 is recorded. For example, the electronic shelf label management server 210 obtains information on the product 400 recorded in the store server 200 from the store server 200 shown in FIG. And recording based on the information of the acquired product 400. In the present invention, the method for associating the product code with the product name is not defined.

  The relative coordinates of the ESL 130 and the absolute coordinates of the ESL 130 recorded in the product link information table include highly accurate information regarding the height at which the ESL 130 is installed. Thereby, the electronic shelf label management server 210 displays information related to the product 400 such as a product code and a product name, a product display shelf displaying the product 400, and the product display shelf at which level of the product display shelf. You can get information about whether or not

  As described above, in the present invention, by reading the shelf barcode 151 of the shelf barcode device 150, the attitude of the mobile terminal device 140 is always kept constant, and the mobile phone device 140 in the mobile terminal device 140 is self-portable. The distance traveled by the terminal device 140 can be calculated. As a result, it is possible to obtain information on the position when the shelf label code 135 affixed to the ESL 130 after reading the shelf barcode 151, that is, the position where the ESL 130 is installed. Furthermore, information on the distance (height) between the mobile terminal device 140 and the floor surface can be acquired with high accuracy by the ultrasonic sensor unit 147 in the mobile terminal device 140. As a result, the position information of the ESL 130 can be automatically acquired with good workability without recording the position information of the ESL 130 in advance. Further, since the information on the height at which the ESL 130 is arranged can be obtained with high accuracy, for example, when the number of shelves in the product display shelf 300 is large, or the number of ESLs 130 arranged in the product display shelf 300 Even when there are many cases, the product 400 can be easily confirmed without making a mistake in the position where the product 400 is displayed.

Further, simultaneously with the associating operation between the product code of the product 400 and the ESL 130 performed when the product 400 is displayed on the product display shelf 300, information on the position where the ESL 130 is installed is acquired, and the position of the acquired ESL 130 is acquired. Information can be corrected. Thereby, it is possible to obtain product management data in which the management data in which the product code of the product 400 is associated with the ESL 130 and the location information of the ESL 130 are associated with each other efficiently.
In addition, for example, when the store clerk checks the information of the product 400 at the time of inventory of the product 400, the position information of the ESL 130 is recorded with the three-dimensional information, so the position of the product 400 is easily specified. be able to.

  In the present embodiment, the ultrasonic sensor unit 147 in the mobile terminal device 140 has been described as detecting the distance (height) between the mobile terminal device 140 and the floor surface. The distance measured by the sound wave sensor unit 147 is not limited to the distance from the floor surface. For example, the ultrasonic sensor unit 147 may be arranged at a position where the distance from the ceiling is measured, and information on the height at which the ESL 130 is arranged can be obtained according to the distance between the ceiling and the mobile terminal device 140. Further, for example, when the merchandise display shelf 300 has a box shape, the ultrasonic sensor unit 147 is disposed at a position for measuring the distance from the side surface of the merchandise display shelf 300, and the side surface of the merchandise display shelf 300 is portable. It can also be set as the structure which acquires the information regarding the distance of the plane direction (for example, X direction in this embodiment) in which ESL130 is arrange | positioned by the distance with the terminal device 140. FIG. In addition, for example, the ultrasonic sensor unit 147 is arranged at a position for measuring the distance in the four directions of up, down, left and right, and shelf information corresponding to the shape of the product display shelf 300 is created, and used for correction based on the shelf information. The detection value of the distance to be selected may be selected.

  Further, in the present embodiment, the configuration using the ultrasonic sensor unit 147 has been described as means for detecting the distance between the mobile terminal device 140 and a reference location (in this embodiment, the floor surface). The present invention does not limit the means for detecting the distance between the mobile terminal device 140 and the reference location to the ultrasonic sensor unit 147. That is, any means that can detect the distance between the mobile terminal device 140 and the reference location may be used. For example, a sensor such as an optical sensor or a distance measuring sensor, or other means that can measure the distance is used. It is also possible to adopt a configuration that is suitable.

In the present embodiment, an example of ESL installed on a merchandise display shelf of a store such as a supermarket or a convenience store has been described as an information display means for displaying information on an article. However, the present invention is limited to ESL. It is not something. For example, it may be a paper medium on which a barcode of identification information for identifying each of the information display means is printed together with information other than information such as products sold at a store.
Further, the present invention is not limited to application in a store such as a supermarket or a convenience store. For example, in a warehouse, etc., to obtain information on labels and tags that display information on the contents of stored items attached to shelves for storing stored items, boxes containing stored items, and stored items themselves Can also be applied. Further, for example, in a business dealing with documents such as a bank, it may be arranged in a paper storage area and used to acquire position information of a display device that displays a description of the paper and the remaining number of sheets. Further, in a factory or the like, it may be attached to a panel for displaying work instructions to workers or a shelf on which parts are placed, and used to acquire position information of labels or tags for displaying information such as parts classification.

  The embodiment of the present invention has been described above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes various modifications within the scope of the present invention. It is.

DESCRIPTION OF SYMBOLS 1 ... Store system 10 ... In-store system 20 ... Backyard system 200 ... Store server 210 ... Electronic shelf label management server 100 ... POS cash register 110 ... Wireless LAN access point 120 ... Repeaters 130, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6, 130-7, 130-8, 130-9, 130-10, 130-11 , 130-12, 130-13 ... ESL
131 ... CPU
132 ... Memory 133 ... LCD display unit 134 ... Wireless communication unit 135 ... Shelf label code 140 ... Mobile terminal device 141 ... CPU
142 ... Memory 143 ... LCD display unit 144 ... Wireless communication unit 145 ... Bar code reading unit 146 ... Sensor unit 147 ... Ultrasonic sensor unit 1471 ... Ultrasonic transmission / reception unit 148 , 149 ... fitting part 150 ... shelf barcode device 151 ... shelf barcodes 152, 153 ... fitting parts 300, 300-1, 300-2, 300-3 ... product display Shelf 400, 400-1, 400-2, 400-3 ... commodity

Claims (7)

Information detecting means for detecting identification information used for identification of information display means for displaying information for identifying an article;
Coordinate detection means for detecting coordinates when the identification information is detected by the information detection means with respect to preset reference coordinates;
Position information calculating means for calculating position information when the identification information is detected by the information detecting means based on the reference coordinates and the coordinates detected by the coordinate detecting means;
Position information that detects a distance from a predetermined reference location, and corrects position information in a specific direction when the identification information calculated by the position information calculation unit is detected based on the detected distance Correction means;
A position information acquisition device comprising: The information detection means further includes
Detects coordinate identification information from an object placed at a predetermined location,
The coordinate detection means further includes
Setting the absolute coordinates pre-associated with the coordinate identification information detected by the information detection means as the reference coordinates;
The position information acquisition apparatus according to claim 1. The coordinate detection means includes
An acceleration sensor for detecting an acceleration when the position information acquisition device moves;
An angle sensor for detecting an angle when the direction of the position information acquisition device changes;
With
The position information correcting means includes
A distance sensor for detecting a distance between the position information acquisition device and a predetermined reference location;
With
Initialize an acceleration detection value output from the acceleration sensor when the reference coordinates are set, and an angle detection value output from the angle sensor,
From the time when the reference coordinates are set based on the detected acceleration value from the acceleration sensor and the detected angle value from the angle sensor output until the identification information is detected by the information detecting means. Calculate the moving distance of the position information acquisition device until the identification information is detected,
Based on the detection value of the distance from the distance sensor that is output when the identification information is detected by the information detection means, the calculated movement distance of the position information acquisition device is corrected,
Based on the corrected moving distance, the coordinates when the position information acquisition device detects the identification information are calculated as relative coordinates with respect to the reference coordinates.
The position information acquisition apparatus according to claim 2. The acceleration sensor is
Detect triaxial acceleration, and output the detected values of the detected triaxial acceleration,
The angle sensor is
Detecting the angle of the three axes, and outputting the detected values of the detected angles of the three axes,
The coordinate detection means includes
Based on the detected value of the triaxial angle output from the angle sensor, the detected value of the triaxial acceleration output from the acceleration sensor is corrected,
Based on the corrected detection value of the triaxial acceleration, the triaxial movement distance of the position information acquisition device is calculated,
The distance sensor is
Output the detection value of the distance in a specific direction of a predetermined reference location,
The position information correcting means includes
Of the three-axis movement distances calculated by the coordinate detection means, the movement distance in a specific direction in which the distance is detected by the distance sensor is replaced with the distance detected by the distance sensor, and the movement distance after the replacement is the position information. The travel distance of the three axes after correction of the acquisition device,
The position information acquisition apparatus according to claim 3. The position information correcting means includes
Detecting the distance in the height direction of the position information acquisition device;
Correcting the height information when the identification information calculated by the position information calculation means is detected among the three-axis movement distances calculated by the coordinate detection means;
The position information acquisition apparatus according to claim 4. The information display means includes
An electronic shelf label that displays information for identifying the article,
The information detecting means includes
Detecting device identification information associated with the electronic shelf label as the identification information;
The position information acquisition apparatus according to claim 1. An information detection procedure in which the information detection means detects identification information used for identification of the information display means for displaying information for identifying the article;
A coordinate detection procedure for detecting coordinates when the coordinate detection means detects the identification information by the information detection means with respect to preset reference coordinates;
A position information calculating procedure for calculating position information when the information detecting means detects the identification information based on the reference coordinates and the coordinates detected by the coordinate detecting means; ,
The position information correcting unit detects a distance from a predetermined reference location, and based on the detected distance, the position information in the specific direction when the identification information calculated by the position information calculating unit is detected. A position information correction procedure for correcting information;
A position information acquisition method comprising:

Images