JP5877379B2 - Electric lock system and responder - Google Patents

Description

The present invention relates to an electric lock system that performs authentication using an interrogator and a responder.

  In this type of electric lock system, for example, when a user who possesses a responder tries to enter the room from the outside and presses the operation button of the operation unit installed on the outdoor side of the door, the interrogator transmits a question signal. Then, the responder receiving the interrogation signal transmits the response signal. The control device of the electric lock system that has received the response signal authenticates based on the response signal, unlocks the door, and allows the user to enter the room.

By the way, the responder (hereinafter referred to as the “responder in the already-entered room”) asks the question as if the user entered the room with a responder and stayed near the door after the electric lock was locked. In the case where the signal is within a range in which the interrogation signal can be received (hereinafter referred to as “communication area”), the following problems arise.
When another person approaches the door from outside and presses the operation button, the interrogator transmits a question signal. Then, the already-entered responder receives the interrogation signal and transmits the response signal. The electric lock is unlocked by this response signal, and the above-mentioned another person can enter the room without having a responder.

In order to solve this problem, when the electric lock is unlocked and locked again, until a predetermined time elapses in consideration of the time for the user having the responder to move out of the communication area There is one that prevents erroneous unlocking by not unlocking even when a response signal is received (Patent Document 1).
If a human sensor is installed inside the door and it is determined that there is a person near the inside of the door, do not send a question signal from the interrogator, or receive a response signal from the responder. However, there are some that prevent erroneous unlocking by not authenticating (Non-patent Document 1).

  In addition, in order to cope with the case where the transponder is left in the communication area, a vibration sensor is mounted on the transponder, a response signal is transmitted while the transponder detects vibration, and vibration is not detected. A technique for preventing erroneous unlocking by not transmitting a response signal is also known (Non-Patent Document 2).

JP 2006-348667 A

Shibutani Co., Ltd., ClavisWeb Catalog 2010 P.I. 45 Passive System EXP7000-CP (Security Building Parts), [online], 2010, Shibutani Co., Ltd. [Search June 29, 2011], Internet <URL: http://www.aladdin-book.jp / v2 / digitalviewer /? clavis # 45> YKK AP Corporation, YKKAPWEB catalog 53 Pocket Key System, [online], February 2011, YKK AP Corporation, [Search June 29, 2011], Internet <URL: http: //www.ykkap.co.jp/search/item /itempage/Cate0002/Genre0002/002.html?KeepThis=true&TB_iframe=true&height=height=430&width=746>

  However, even if the response signal from the responder is not accepted for a certain period of time after locking, when the certain time has passed and the response signal is received again, the responder in the already-entered room is still in the communication area. If there is, there is a possibility of unlocking. Even if a human sensor is installed, if a person cannot be correctly detected by a shield or the like, there is a possibility that the responder in the already-entry room may erroneously unlock. Even if a response sensor is installed in the responder so that a response signal is not sent when it is left unattended, for example, when an operation button is operated from the outside at the timing held by a person or when a pet touches There is a possibility of unlocking when there is vibration.

  Therefore, the present invention has been made in view of such problems, and even if the responder is in the communication area without using a human sensor or vibration sensor, the electric lock is erroneously released by the responder. An object is to provide an unlocked electric lock system.

In order to solve the above-mentioned problems, the electric lock system according to the present invention has two operation devices installed on the outside and inside of the door, and the reception intensity of the interrogation signal sent via the LF antenna built in each operation device. A responder to be measured, and a lock control device that unlocks on condition that the operating device having the maximum measured intensity at the responding device is an operating device installed on the side where the door opening operation is to be performed. Features.
Here, you may make it the said operating device transmit the question signal containing the information which shows whether the said operating device is an operating device located in the side which is going to perform door opening operation.

  Here, the responder includes information indicating that the question signal having the maximum measured intensity among the question signals from the respective operating devices is from the operating device located on the side on which the door opening operation is to be performed. In the case of transmitting a response signal and including information indicating that the question signal having the maximum measured intensity is from an operating device installed on the side where the door is not operated, the response signal Transmission may be suppressed, and the lock control device may perform the unlocking on the condition that a response signal from the responder has been received.

  Here, the responder determines whether or not the question signal having the maximum measured intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed, A response signal including information indicating the result of the determination is transmitted, and the lock control device transmits information indicating that the question signal having the maximum measured strength is from an operating device located on the side on which the door opening operation is to be performed. The unlocking may be performed on the condition that a response signal including the response signal is received from the responder.

  Here, for each question signal from each of the operation devices, the responder includes information indicating whether or not the operation device that transmitted the question signal is located on the side on which the door opening operation is to be performed and the question signal. A response signal including the measurement value of the received intensity in association with each other, and the lock control device performs an operation corresponding to the maximum measurement value by comparing each measurement value included in the response signal received from the responder. It may be determined whether or not the container is located on the side where the door opening operation is to be performed, and the unlocking may be performed on the condition that the determination is positive.

Here, when each operation unit of the door is operated, each operation unit may include the identification information of the own unit in the question signal and transmit the plurality of times.
Here, when the operation unit of the door is operated, the question signals may be transmitted in a transmission period in which the operation devices do not overlap each other.
Here, the transponder may include triaxial antennas orthogonal to each other, and the measurement value related to the measurement of the reception intensity may be a value obtained by combining the measurement values of the reception intensity related to the respective axis antennas. .

Here, the transponder includes three-axis antennas orthogonal to each other, and the measurement value related to the measurement of the reception intensity includes the value of the reception intensity for each axis antenna as an element, and the interrogation signal from each operation device Of these, the interrogation signal with the maximum measurement intensity may be an interrogation signal with the maximum reception intensity value for any of the three-axis antennas.
Here, each of the operation devices further periodically transmits a question signal including identification information of the device itself, and the responder includes a plurality of question signals including the same identification information from one operation device. If the received intensity is kept within a certain range for a certain period, the response signal may not be transmitted.

Here, the responder may put the responder into a sleep state when reception strengths of a plurality of interrogation signals including the same identification information from one operating device are maintained within a certain range for a certain period. .
Here, the responder indicates that it is in a neglected state when the reception strengths of a plurality of interrogation signals including the same identification information from one controller are kept within a certain range for a certain period. The lock control device transmits a sleep instruction signal for causing the responder to sleep for a predetermined time in response to the transmission of the neglect signal from the responder, and transmits the sleep instruction signal to the controller. The responder that has received the signal may shift to the sleep state and return to the normal state when a certain time has elapsed after the shift.

Here, the responder may include display means for displaying different information depending on whether the sleeper is in the normal state or the normal state.
Here, the responder may include an operation member for returning from the sleep state, and may return from the sleep state to the normal state when the operation member is operated.
Here, the responder indicates that it is in a neglected state when the reception strengths of a plurality of interrogation signals including the same identification information from one controller are kept within a certain range for a certain period. The electric lock system further includes a notifying device for transmitting a signal and notifying the person that the responder is in a neglected state in response to transmission of the neglected signal from the responder. It may be.

In order to solve the above-mentioned problem, a responder according to the present invention is a responder of an electric lock system including a plurality of operation devices, and receives a question signal from the operation device, and transmits a signal of the question signal. Measuring means for measuring the intensity, and control means for controlling transmission of the response signal based on the signal intensity measured by the measuring means.
Here, the control means includes information indicating that the question signal having the maximum measured intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed. In the case of transmitting a response signal, if the question signal having the maximum measured intensity includes information indicating that the operation signal is not located on the side where the door opening operation is to be performed, the response signal is transmitted. You may make it suppress.

Here, the control means determines whether or not the question signal having the maximum measurement intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed, A response signal including information indicating the determination result may be transmitted.
Here, for each question signal from each of the operation devices, the control means includes information indicating whether or not the operation device that transmitted the question signal is located on the side on which the door opening operation is to be performed and the question signal. You may make it transmit the response signal which matches and matches the measured value of the said received strength.

  With the above-described configuration, the electric lock system according to the present invention can unlock the electric lock by mistake even if the responder is in the communication area without using a human sensor or a vibration sensor. Can be prevented.

Schematic of the system configuration of the electric lock system 1 according to the first embodiment of the present invention. Functional block diagram of electric lock system 1 according to Embodiment 1 of the present invention (A) Data configuration diagram of question signal 300 according to Embodiment 1, (b) Data configuration diagram of response signal 400 according to Embodiment 1. Flowchart of processing of control circuit 141 on the door side according to Embodiment 1. Conceptual diagram for explaining the relationship between the reception intensities from operation devices 12A and 12B according to the first embodiment Flowchart of the process of the control circuit 111 of the responder 11 according to the first embodiment. Flowchart of processing of control circuit 141 on the door side according to the second embodiment. Flowchart of the process of the control circuit 111 of the responder 11 according to the second embodiment. (A) Configuration diagram of data in response signal 900 of Modification Example 1 (b) Configuration diagram of data in response signal 1000 of Modification Example 2 (A) Data configuration diagram in the sleep instruction signal 600 of the interrogator at the time of sleep instruction (b) Data configuration diagram of the neglect signal 700 in the neglected state Flow chart of processing of the control circuit 111 of the responder 11 when a neglect signal is transmitted The figure explaining the modification of LF transmission circuit structure of the control unit 14

<Embodiment>
<1. Embodiment 1>
Hereinafter, an electric lock system according to an embodiment of the present invention will be described.
<1-1. Overview>
In the first embodiment, one controller 12A, 12B is installed inside and outside the door. The operation device 12A is an outdoor operation device, and the operation device 12B is an indoor operation device. The operation device 12A or 12B is provided with an operation button 13A or 13B, respectively. Based on an instruction from the control unit 14, the operation device 12A or 12B uses a question signal to indicate whether or not the operation button of its own device has been operated. 300 is transmitted. The responder 11 (tag) compares the magnitudes of RSSI (Received Signal Strength Indication) values of the interrogation signal 300 transmitted from the operation device 12A or 12B. Depending on the information on whether or not the operation button 13A or 13B of the operation device 12A or 12B included in the question signal 300 has been operated, and the magnitude of the RSSI value of the question signal 300 transmitted from each operation device 12A and 12B The device 11 determines whether or not the own device is located on the side of the operation device on which the operation button is operated with the door as a boundary. When the responder 11 is on the operating device side where the operation button is operated, the responder 11 transmits a response signal 400.
The control circuit 141 that has received the response signal 400 authenticates whether or not the responder 11 is a responder previously registered in the electric lock system 1 (hereinafter referred to as a “regular responder”), and the electric lock 18A, Unlock 18B. On the other hand, when the responder 11 is not located on the side where the operation button is operated, the responder 11 prevents the unlocking of the electric locks 18A and 18B by the control circuit 141 by not transmitting the response signal 400.

The outline will be described below with reference to the drawings.
FIG. 1 is a schematic diagram of a system configuration of an electric lock system 1 according to Embodiment 1 of the present invention.
An operation device 12A is installed on the outdoor side of the door 15 of the building, and an operation device 12B is installed on the indoor side, and operation buttons 13A and 13B are provided on each operation device. The operation button 13A or 13B serves as a trigger for transmitting the question signal 300 from the operation devices 12A and 12B. In order to enter from the outside to the inside of the locked door, the user presses the operation button 13A. It is necessary to press.

  When a person who possesses the responder 11 operates the operation button 13A to unlock the electric locks 18A and 18B of the door 15 to enter the indoor space, a question signal 300 is transmitted from each of the operators 12A and 12B. At this time, question signal 300 including information that the operation button has been operated is transmitted from operation device 12A, but question signal 300 not including information that the operation button has been operated is transmitted from operation device 12B. Is done.

  When the responder 11 receives the interrogation signal 300 transmitted from the controllers 12A and 12B, the responder 11 measures and compares the signal strength (RSSI value) of each interrogation signal 300. When the RSSI value of the question signal 300 including information that the operation button has been operated is larger than the RSSI value of the question signal 300 that does not include information that the operation button has been operated, the responder 11 transmits the response signal 400. To do. Otherwise, the responder 11 does not transmit the response signal 400.

In this way, the responder 11 compares the RSSI values of the received signals from the operating devices 12A and 12B, determines whether or not the responding device 11 is on the operating device side where the operating button is operated, and the response signal 400 Therefore, it is possible to prevent the electric locks 18A and 18B from being unlocked erroneously.
<1-2. Configuration>
Hereinafter, the configuration of the electric lock system 1 will be described in detail.

FIG. 2 is a functional block diagram of the electric lock system 1.
The electric lock system 1 includes an interrogator 10, electric locks 18 </ b> A and 18 </ b> B, a door opening sensor 147, and a responder 11 that is a key for a person to carry and unlock the door. Consists of.
<Interrogator 10>
The interrogator 10 includes a control unit 14, an operating device 12A (outdoor operating device), an operating device 12B (indoor operating device), a UHF (Ultra High Frequency) receiving circuit 16, and a UHF antenna 17 for the UHF receiving circuit 16. Consists of including.

<Control unit 14>
The control unit 14 includes LF (Low Frequency) transmission circuits 142A and 142B for transmitting the inquiry signal 300, electric lock drive circuits 143A and 143B for locking / unlocking the electric locks 18A and 18B, and operations of these circuits. A control circuit 141 for controlling and a power supply 144 are provided.
The LF transmission circuits 142A and 142B transmit the interrogation signal 300 in the LF band (for example, 135 kHz) via LF antennas 145A and 145B described later. The time required to transmit one question signal 300 is, for example, about several tens of milliseconds.

The power supply 144 is a battery and supplies power for driving each unit. In addition, you may make it receive electric power supply from a commercial power source.
The control circuit 141 includes a CPU (Central Processing Unit) that executes a control program, a ROM (Read Only Memory) that stores the control program, and a built-in memory.

In the control program, whether the operation button 13A or 13B of the operation device 12A or 12B is operated, the transmission of the inquiry signal 300 is processed, the response signal 400 from the response device 11 is processed, and the response program 400 is a normal response device. Is included, and a program for controlling the locking and unlocking of the electric locks 18A and 18B is included.
The control circuit 141 stores the identification information of the responder in advance in a built-in memory (flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory)) by a registration operation by the system administrator.
Etc.). The regular transponder refers to a transponder whose identification information is stored in the control circuit 141 in advance. The authentication of whether or not it is a legitimate transponder is determined by whether or not the identification information of the transponder included in the response signal 400 matches the identification information of the transponder stored in the built-in memory.
<Operators 12A and 12B>
The operation device 12A includes an operation button 13A, an LF antenna 145A, and a display circuit 146A.

The LF antenna 145A is a coil-type LF antenna.
Since the operation device 12B has the same configuration as the operation device 12A, the description thereof will be omitted.
The operation buttons 13A and 13B are triggers for transmitting the question signal 300 from the operation devices 12A and 12B. When either one of the operation buttons is operated, the operation devices 12A and 12B both receive the question signal 300. Send.
The LF antenna 145A or 145B of the controller 12A or 12B is arranged so that the reception intensity of the interrogation signal 300 received by the responder 11 from the controllers 12A and 12B is substantially the same at a position equidistant from the controller 12A or 12B. The coils of the LF antennas 145A and 145B are adjusted to be parallel.

The display circuits 146A and 146B perform various display outputs such as operating states of the respective operation devices 12A or 12B with, for example, LED (Light Emitting Diode) lamps or displays.
<UHF receiver circuit 16>
The UHF receiving circuit 16 receives a UHF band (for example, 426 MHz) response signal 400 from the responder 11 using the UHF antenna 17.

The UHF receiving circuit 16 is connected to the control circuit 141, and the received response signal 400 is sent to the control circuit 141. The UHF receiving circuit 16 and the UHF antenna 17 may be incorporated in the operation devices 12A and 12B and the control unit 14.
<Electric lock 18A, 18B>
The electric locks 18A and 18B lock and unlock the door 15, and have a double structure for crime prevention.
The electric lock 18A includes a lock driving device 181A, a lock / unlock sensor 182A, and a lock 183A.

The lock driving device 181A is, for example, a motor, and locks or unlocks the lock 183A by rotating the motor.
The lock / unlock sensor 182A detects whether the lock 183A is unlocked or locked.
Since the electric lock 18B has the same configuration as the electric lock 18A, description thereof is omitted.

The control circuit 141 and the electric locks 18A and 18B are connected via electric lock drive circuits 143A and 143B.
When the authentication judgment is made by the control circuit 141 and the authentication is successful, the electric lock driving circuits 143A and 143B of the electric locks 18A and 18B are controlled to unlock the electric locks 18A and 18B.
<Opening sensor 147>
The door opening sensor 147 is for detecting whether the door 15 is open or closed. After the electric locks 18A and 18B are unlocked, the door 15 is opened, and the door 15 is opened again. Determine whether the door is closed.
<Responder 11>
The responder 11 includes a control circuit 111, an LF reception circuit 112, an LF antenna 114, a UHF transmission circuit 115, a UHF antenna 116, a display circuit 117, an operation button 118, and a power source 119.

The control circuit 111 includes a CPU that executes a control program, a ROM that stores the control program, and a built-in memory. The CPU has a variable operation clock, and can operate with a low clock to reduce power consumption.
The control program includes a program that processes the received interrogation signal 300, compares reception strengths, and controls transmission of the response signal 400. This program uses the comparison result to determine whether or not to transmit the response signal 400 or to generate the response signal 400.

The LF receiving circuit 112 receives the interrogation signal 300 in the LF band using the coil type LF antenna 114.
The LF antenna 114 has a three-axis configuration in which three independent coils are arranged orthogonally. Therefore, the question signal 300 can be stably received regardless of the orientation of the responder 11.

The LF reception circuit 112 includes an RSSI detection circuit 113, and the RSSI detection circuit 113 measures the RSSI value of the received question signal 300.
The UHF transmission circuit 115 transmits the response signal 400 generated by the control circuit 111 using the UHF antenna 116 in the UHF band. The time required to transmit one response signal 400 is, for example, about several tens of milliseconds.

The display circuit 117 performs various display outputs such as the operating state of the responder 11 using, for example, an LED lamp or a display.
The operation button 118 is used to operate the power source 119 of the responder 11 or return from the sleep state. The sleep state here means that the power supply from the power source 119 to the LF reception circuit 112 and the UHF transmission circuit 115 is stopped, the CPU is operated at a low clock, and the standby mode is set. On the other hand, a state that is not in the sleep state is referred to as a normal state.

The power source 119 is composed of, for example, a coin-type lithium battery, and supplies power for driving each unit.
<1-3. Data>
<Data of Question Signal 300 Transmitted from Each Controller 12A, 12B>
FIG. 3A is a diagram illustrating a data configuration of the question signal 300 transmitted from each operation device 12A, 12B.

The question signal 300 includes a PR (Preamble) 301, a UW (Unique Word) 302, a command 303, an operation device ID 304, a flag 305, and a CRC (Cyclic Redundancy Check) 306, as shown in FIG.
The question signal 300 is generated by the control circuit 141 when the operation button 13A or 13B is operated.

Here, PR301 is a bit string (synchronous code) indicating the start of data of the interrogation signal 300, UW302 is a so-called frame synchronization signal, and a command 303 is used to instruct a response operation request of the responder 11. It is a command.
The operation device ID 304 is identification information of the operation device 12A or 12B that is the transmission source of the question signal 300.

The flag 305 is a flag indicating whether or not the operation button 13A or 13B of the operation device 12A or 12B that is the transmission source of the question signal 300 is operated. Hereinafter, as an example, “1” is set when the operation button is operated. The case where no operation is performed will be described as “0”.
Based on the flag 305, the responder 11 can determine whether or not the question signal 300 is transmitted from the operation device whose operation button has been pressed.

The CRC 306 is data for enabling the responder 11 that has received the question signal 300 to detect whether or not an error has occurred in the question signal 300.
<Data of the response signal 400 transmitted from the responder 11>
FIG. 3B is a diagram illustrating a data configuration of the response signal 400 transmitted from the responder 11.

The response signal 400 includes a PR 401, a UW 402, a command 403, an operation unit ID 404, a response unit ID 405, and a CRC 406 as shown in FIG.
Here, PR 401 is a bit string (synchronous code) indicating the start of data of the response signal 400, UW 402 is a so-called frame synchronization signal, and command 403 is a command that instructs the control circuit 141 to request processing.

The operation device ID 404 is identification information of the operation device 12A or 12B included in the received question signal 300, and the response device ID 405 is identification information of the own device.
The control circuit 141 can authenticate whether it is a regular responder by including the identification information of the responder 11 in the response signal 400.
The CRC 406 is data for the control circuit 141 that has received the response signal 400 to detect whether an error has occurred in the response signal 400.
<1-4. Operation>
Next, a specific operation will be described.

When the user who has the responder 11 operates the operation button 13A or 13B of the operation device 12A or 12B, the question signal 300 is transmitted from the operation devices 12A and 12B. The interrogation signal 300 is transmitted not only from one operating device whose operating button is operated, but also from the other operating device whose operating button is not operated.
The responder 11 that has received the interrogation signal 300 transmitted from the controllers 12A and 12B measures and compares the received intensity. The responder 11 transmits the response signal 400 only when the reception intensity of the question signal 300 transmitted from the operation device on which the operation button is operated is higher. The control circuit 141 that has received the response signal 400 authenticates whether the responder 11 is a normal responder, and unlocks the electric locks 18A and 18B. On the other hand, when the reception intensity of the interrogation signal 300 from the operation device on which the operation button is operated is not higher, the responder 11 does not transmit the response signal 400, and thus the electric locks 18A and 18B are not unlocked. .

<Processing of Control Circuit 141>
FIG. 4 is a flowchart of processing of the control circuit 141 of the control unit 14 when the operation button 13A or 13B is operated. Hereinafter, the operation will be described by taking as an example a case where the operation button 13A of the operation device 12A on the outdoor side is operated. Further, the question signal 300 transmitted from the operation device 12A in which the operation button 13A is operated is the first question signal 300, and the question signal 300 transmitted from the operation device 12B in which the operation button 13B is not operated is the second question signal. This will be described as a signal 300.

  When the operation button 13A of the operation device 12A is operated, the control circuit 141 transmits a question signal 300 including identification information of the operation device 12A and information indicating that the operation button 13A is operated. That is, the operation signal ID 300 is set to the operation device ID of the operation device 12A and the flag 305 is set to “1”, and the question signal 300 including the information is generated (step S1) and transmitted via the LF transmission circuit 142A (step S1). Step S2).

  Next, the operation signal ID including the identification information of the operation device 12B and the information indicating that the operation button 13B is not operated, that is, the operation device ID of the operation device 12B is set in the operation device ID 304, and “0” is set in the flag 305. The question signal 300 including the information for which “is set” is generated (step S3). The control circuit 141 transmits the generated inquiry signal 300 via the LF transmission circuit 142B (step S4).

At this time, since the time taken to transmit the first question signal 300 is about several tens of milliseconds, for example, the first question signal 300 is transmitted so that the transmission periods of the first and second question signals 300 do not overlap. Thereafter, the second question signal 300 is transmitted after several tens of milliseconds.
The control circuit 141 determines whether or not the response signal 400 is received via the UHF receiving circuit 16 within a predetermined time (for example, 1 second) after transmitting the second interrogation signal 300 in step S4 (step S5). ).

  When the response signal 400 is received (step S5: Yes), the control circuit 141 authenticates whether the responder ID 405 of the response signal 400 matches the pre-recorded identification information (step S6). When the authentication is successful, that is, when the response signal 400 received in step S5 is transmitted from the regular responder (step S6: Yes), the control circuit 141 passes through the electric lock drive circuits 143A and 143B. The lock driving devices 181A and 181B of the electric locks 18A and 18B are driven to perform unlocking (step S7).

  After unlocking the electric locks 18A and 18B, the unlocked state is maintained until the person opens and closes the door (step S8), and then the electric locks 18A and 18B are locked again via the electric lock drive circuits 143A and 143B. The drive devices 181A and 181B are driven and locked (step S9), and a series of processes when the operation button 13A is operated is terminated. A user who holds the responder 11 and presses the operation button 13A of the operation device 12A during this unlocked state can enter the room.

When the response signal 400 is not received at step S5 (step S5: No) and when authentication is not successful at step S6 (step S6: No), the repetitive processing from step S1 is performed a predetermined number of times (for example, 3 If not reached (step S10: No), processing is performed from step S1. If the operation is repeated a predetermined number of times (step S10: Yes), a series of processes when the operation button 13A is operated is terminated.
<Processing of the responder 11>
First, a method for comparing the reception intensity of the interrogation signal 300 transmitted from each controller 12A, 12B will be described.

FIG. 5 shows the relationship between the communication area of the question signal 300 transmitted from each operation device 12A, 12B installed inside and outside the door 15, the distance from each operation device 12A, 12B, and the magnitude of the reception intensity of the question signal 300. FIG.
The operation devices 12A and 12B are installed inside and outside the door 15 with the door 15 in between. Area 60A is a communication area for question signal 300 transmitted from operation device 12A, and area 60B is a communication area for question signal 300 transmitted from operation device 12B. The areas 60A and 60B are ranges in which the distance from the operation devices 12A and 12B is about 1.5 meters at the maximum (when the LF band is used). The graph 61A is a graph showing the relationship between the signal intensity of the interrogation signal 300 of the operation device 12A and the distance, and the value is the largest at the position where the operation device 12A is installed, and becomes smaller as the operation device 12A moves away. Similarly, the graph 61B is a graph showing the relationship between the signal intensity of the interrogation signal 300 of the operation device 12B and the distance.
For example, Ra when the RSSI value of the interrogation signal 300 transmitted from the operation device 12A when the responder 11 is in the position shown in FIG. 5 is Ra and the RSSI value of the interrogation signal 300 transmitted from the operation device 12B is Rb. The measured value of Rb is calculated as follows.

  Since the LF antenna 114 of the responder 11 has an orthogonal three-axis configuration as described above, a value obtained by combining the RSSI values received by the respective antennas is used as the RSSI value of the interrogation signal 300. That is, assuming that the reception strengths at the X-axis, Y-axis, and Z-axis antennas are Rax1, Ray1, and Raz1, respectively, the combined value Ra is Ra = (Rax1 ^ 2 + Ray1 ^ 2 + Raz1 ^ 2) ^ (1/2) It can be expressed as. For Rb, the reception strengths of the X-axis, Y-axis, and Z-axis antennas can be similarly calculated as Rbx1, Rby1, and Rbz1.

As a result, regardless of the orientation of the response signal 11 received by the responder 11, it is possible to compare the reception intensity of the inquiry signal 300 transmitted from the operation devices 12 </ b> A and 12 </ b> B regardless of the orientation of the response device 11.
At this time, as a result of comparing the values of Ra and Rb, it is determined that the responder 11 is closer to the controller with the larger RSSI value. In the above case, since Ra> Rb, it is determined that the responder 11 is located at a position closer to the operation device 12A than the operation device 12B, that is, on the outdoor side.
Then, the processing content of the control circuit 111 of the responder 11 is demonstrated.

FIG. 6 is a flowchart of the process of the control circuit 111 of the responder 11.
The control circuit 111 of the responder 11 receives the first inquiry signal 300 from the LF antenna 114 via the LF reception circuit 112 (step S11). Next, the control circuit 111 measures the RSSI value R1 of the first interrogation signal 300 with the RSSI detection circuit 113 (step S12). Similarly, the control circuit 111 receives the second question signal 300 (step S13), and measures the RSSI value R2 of the second question signal 300 (step S14).

The control circuit 111 compares the magnitudes of R1 and R2 (step S15). In this example, since the flag 305 of the received first question signal 300 is set to “1”, the control circuit 111 knows that the operation button 13A of the operation device 12A is operated.
Therefore, when R1> R2 (step S15: Yes), it is determined that the RSSI value from the operating device (12A in this example) on which the operation button 13A is operated is larger, so the control circuit 111 A response signal 400 in which the identification information of the own device is set in the responder ID 405 is generated (step S16). The control circuit 111 transmits the response signal 400 generated from the UHF antenna 116 via the UHF transmission circuit 115 (step S17).

The processing of the control circuit 141 that has received the response signal 400 transmitted in step S17 has already been described (see FIG. 4).
On the other hand, when the condition of R1> R2 is not satisfied (step S15: No), the RSSI value of the first question signal 300 is not larger than the RSSI value of the second question signal 300. In this example, since “0” is set in the flag 305 of the second question signal 300, the control circuit 111 of the responder 11 indicates that the second question signal 300 is the operation button 13B of the operation device 12B. It can be determined that is not operated. That is, since it can be determined that the operation device with the larger RSSI value is not the operation device with the operation button operated, the responder 11 does not transmit the response signal 400. Therefore, the electric locks 18A and 18B are not unlocked, and the erroneous unlocking of the electric locks 18A and 18B can be prevented.
<2. Second Embodiment>
In the first embodiment, the unlocking determination is performed using the information on whether or not the question signal 300 is transmitted from the operating device installed on the unlocking side and the RSSI value of the question signal 300 received by the responder 11. An example is shown.

When the responder 11 is left in the communication area, it can be unlocked and entered even if the responder 11 is left on the side where the door is opened. In the second embodiment, an example will be described in which it is determined whether or not the responder 11 is in a neglected state, and erroneous unlocking can be prevented even when the above responder is left unattended.
Hereinafter, description of points that are not changed from those shown in the first embodiment will be omitted, and the changed points will be described mainly.
<2-1. Overview>
The operating devices 12A and 12B transmit the interrogation signal 300 alternately at regular intervals (for example, at intervals of 1 minute) for a fixed time (for example, about 1 second). The responder 11 receives each interrogation signal 300 transmitted in the meantime, and measures the RSSI value of the interrogation signal 300 received. Then, the RSSI values of the question signal 300 transmitted from the controllers 12A and 12B are compared, and the magnitude of the RSSI value of the question signal 300 transmitted from the controller having the larger RSSI value is a predetermined signal level. If it is within the range, the responder 11 determines that it is left unattended and does not transmit the response signal 400.

Furthermore, when the responder 11 is left unattended for a certain period (for example, about 1 minute), the responder 11 puts the responder 11 into a sleep state. The responder 11 that has shifted to the sleep state displays a display that is not in the normal state on the display circuit 117 so that a person can recognize whether or not it is in the sleep state. The responder 11 returns from the sleep state to the normal state when the operation button 118 of the responder 11 is pressed.
<2-2. Configuration>
Hereinafter, the configuration will be described in detail.

The configurations of the control circuit 141 and the responder 11 are different from those of the first embodiment.
The control circuit 141 and the responder 11 according to the second embodiment are slightly different from the control circuit 141 and the responder 11 according to the first embodiment in the contents of the control program. Since only the contents of the control program are slightly different, the control circuit 141 and the responder 11 will be described using the same reference numerals as in the first embodiment.
These configurations will be described with emphasis, and descriptions of other configurations that are not changed will be omitted.

<Control circuit 141>
The difference from the configuration of the first embodiment is that the control program further includes a program for controlling the question signal 300 to be periodically transmitted from the controllers 12A and 12B a plurality of times. By this control program, the operating devices 12A and 12B transmit the interrogation signal 300 alternately several times at regular time intervals.

<Responder 11>
The difference from the configuration of the first embodiment of the control program of the responder 11 is that the difference between the RSSI values of the interrogation signals 300 transmitted from the same controller a plurality of times is calculated, and the difference is within a certain level. The program further includes a program for determining whether or not there is a control and for making a control such as putting the device in the sleep state. Thereby, when the RSSI value of the interrogation signal 300 received from the same controller is within a certain level, it is determined that the device is left and control is performed such that the response signal 400 is not transmitted, Make your device sleep.
<2-3. Operation>
Next, a specific operation will be described.

Hereinafter, the operation will be described by taking as an example a case where the operation button 13A of the operation device 12A on the outdoor side is operated.
<Processing of Control Circuit 141>
FIG. 7 is a flowchart of processing of the control circuit 141 of the control unit 14 according to Embodiment 2 when the operation button 13A or 13B is operated.

The processing different from the first embodiment is processing for continuously transmitting the question signal 300 a plurality of times.
Step S41 is a summary of the processing of steps S1 to S4 in FIG.
When the electric locks 18A and 18B are in the locked state, the control circuit 141 periodically performs the process of step S41 for a predetermined number of times N1 (for example, several times) (step S42: No). The operation of the responder 11 that receives these interrogation signals 300 will be described later.

The control circuit 141 determines whether or not the response signal 400 has been received after transmitting the inquiry signal 300 a predetermined number of times N1 (step S42: Yes) (step S43). When the response signal 400 is received (step S43: Yes), it is authenticated whether or not the response signal 400 is from a legitimate responder. When the authentication is successful (step S44: Yes), the electric locks 18A and 18B are used. Is unlocked / locked (step S45). Step S45 is a summary of steps S7 to S9 in FIG.
<Processing of the responder 11>
FIG. 8 is a flowchart of the process of the control circuit 111 of the responder 11 according to the second embodiment.

Step S51 summarizes the processing of steps S11 to S14 in FIG.
The control circuit 111 of the responder 11 receives the interrogation signal 300 from the operation devices 12A and 12B and measures the RSSI value. Since the interrogators 12A and 12B transmit the interrogation signal 300 a plurality of times, the reception / measurement process (step S51) is repeated until a predetermined number of times N2 (for example, dozens of times) is received (step S52). The measured RSSI value is stored in the built-in memory.

  Here, when one of the controllers 12A and 12B is the first question signal 300 and the other is the second question signal 300, the question signal 300 from the first controller received i-th time. If R1i is R1i and the RSSI value of the interrogation signal 300 from the second controller is R2i (i = 1 to N2), R1i and R2i are compared, and for all i, R1i> R2i (step S53: Yes), the absolute value of the difference in reception intensity of each question signal 300 is calculated for the first question signal 300. That is, the absolute value of the difference between the RSSI values of each question signal 300 is calculated for the operation device having the higher reception strength of the question signal 300. Here, if the RSSI value of the interrogation signal 300 received from the first operation unit 300 j is R1j (j = 1 to N2, i ≠ j), the absolute value R1_ij of the difference between the RSSI values R1i and R1j is R1_ij = | R1i−R1j | (i ≠ j). R1_ij is calculated for all i, j (i ≠ j) pairs, and all R1_ij are R1_ij <α (i ≠ i) for a predetermined level difference α assumed when the responder 11 is left unattended. If j) is satisfied, it is determined that it is left unattended, and the response signal 400 is not transmitted (step S54: Yes). When it is determined that it is not in the neglected state (step S54: No), when R1i is an RSSI value from the operation device 12A where the operation button 13A is operated (step S55: Yes), the response signal 400 is sent. Generate (step S56). The control circuit 111 of the responder 11 transmits the generated response signal 400 via the UHF transmission circuit 115 (step S57).

  As described above, the responder 11 periodically receives the interrogation signal 300 transmitted from the operation devices 12A and 12B a plurality of times, and compares the difference in RSSI values of the interrogation signal 300 from the same operation device. It is possible to determine whether or not the device is left unattended. If it is determined that the responder 11 is left unattended, the responder 11 does not transmit the response signal 400. Thereby, even if the operation button 13A of the operation device 12A is operated, the electric locks 18A and 18B are not accidentally unlocked, and erroneous unlocking can be prevented.

Although not specifically illustrated and described, when the control circuit 111 of the responder 11 determines that the self-device is left unattended, the CPU clock is switched to the low speed mode, and the control circuit 111 to the LF reception circuit 112 and the UHF transmission circuit 115 is switched. Stop power supply.
The display circuit 117 of the responder 11 displays different from the normal state. For example, the LED lamp that is lit in the normal state is turned off or the fact that the display is in the sleep state is visually notified. To return from the sleep state, the operation button 118 of the responder 11 is operated. When the operation button 118 is operated, the control circuit 111 starts supplying power to the LF reception circuit 112 and the UHF transmission circuit 115, returns the operation clock of the CPU to normal, and returns the responder 11 to the normal state.
<3. Modification>
As mentioned above, although the embodiment of the electric lock system according to the present invention has been described, the exemplified electric lock system can be modified as follows, and the electric lock system according to the present invention is shown in the above embodiment. Of course, it is not limited to a lock system.
(1) Modification 1
In the first embodiment, the responder 11 determines whether or not the own device is on the same side as the operation device 12A or 12B on which the operation button 13A or 13B is operated with respect to the door 15, and the own device is Although the configuration in which the response signal 400 is not transmitted when the operation button 13A or 13B is not on the operated side is shown, the response signal 900 is transmitted even when the own device is not on the operation button 13A or 13B side. You may make it do.

In this case, the response signal 900 including the determination result as to whether or not the responder 11 of the first modification is on the side where the operation button 13A or 13B is operated is transmitted, and the control circuit 141 determines the determination result from the responder 11 It is sufficient to determine whether or not to unlock based on the above.
FIG. 9A is a data configuration diagram of the response signal 900 of the first modification. The flag 906 is a flag indicating whether the responder 11 is on the same side as the operating device 12A or 12B on which the operation button 13A or 13B is operated with respect to the door 15. Since the data other than the flag 906 is the same as that in the first embodiment, the description thereof is omitted.

As an example, when the operation button is on the same side as the operated operating device, “1” is set, and when the operation button is not set to “0”, the control circuit 141 performs the following processing according to the value of the flag 906.
When the value of the flag 906 included in the received response signal 900 is “1”, it indicates that the responder is located on the operating device side where the operation button is operated. Therefore, the control circuit 141 performs authentication. The electric locks 18A and 18B are unlocked. On the other hand, when the value of the flag 906 is “0”, it indicates that there is no responder on the side of the operating device on which the operation button is operated, and therefore the control circuit 141 unlocks the electric locks 18A and 18B. Absent.
(2) Modification 2
In the first embodiment, it is determined whether or not the responder 11 is on the same side as the operation device 12A or 12B on which the operation button is operated with respect to the door 15, but the control circuit 141 operates the operation button. By comparing the RSSI values of the interrogation signal 300 transmitted from the operated operation device 12A or 12B, it is determined whether or not the responder 11 is on the same side as the operation device 12A or 12B where the operation button is operated. Also good.

Hereinafter, the contents of the process will be described with reference to the drawings.
Here, the operation device on the side where the operation button is operated is referred to as a first operation device, and the operation device on the side where the operation button is not operated is referred to as a second operation device. Whether or not the operation button is the operating device on the side operated can be determined from the value of the flag 305 of the question signal 300 received by the responder 11 of the second modification.
FIG. 9B is a data configuration diagram of the response signal 1000 of the second modification. The operation device 1ID1004 is identification information of the operation device (first operation device) on the side where the operation button is operated, the RSSI value 11005 is the RSSI value of the question signal 300 from the first operation device, and the operation device 2ID1006 is The identification information of the operation device (second operation device) on which the operation button is not operated, the RSSI value 21007 is the RSSI value of the interrogation signal 300 transmitted from the second operation device. Since other data is the same as that of the first embodiment, the description thereof is omitted.

The responder 11 of the second modification receives the interrogation signal 300 transmitted from the operating devices 12A and 12B, and measures the reception intensity thereof. The responder 11 of the second modification does not compare the received strength of the measured interrogation signal 300, and generates and transmits a response signal 1000 including the RSSI value as shown in FIG. 9B.
The control circuit 141 that has received the response signal 1000 compares the RSSI value 11005 and the RSSI value 21007 included in the response signal 1000. When the RSSI value 11005 is larger than the RSSI value 21007, it is determined that the RSSI value of the question signal 300 transmitted from the operation device on which the operation button is operated is large, and the response device ID 1008 is registered in advance. If it matches, the electric locks 18A and 18B are unlocked. On the other hand, when the RSSI value 11005 is smaller, the electric locks 18A and 18B are not unlocked.

Thus, since the responder 11 does not compare the RSSI values of the interrogation signal 300, the processing load of the responder 11 of the modification 2 is reduced.
(3) Modification 3
In each of the above-described first and second embodiments, the RSSI value of the interrogation signal 300 is the combined value of the RSSI values of the three-axis LF antenna 114 orthogonal to the responder 11, but the antenna axis is as follows. Each RSSI value may be used.

  That is, the RSSI values of the interrogation signal 300 transmitted from the controller 12A received by the X-axis, Y-axis, and Z-axis antennas of the 3-axis LF antenna 114 of the responder 11 are respectively Rax1, Ray1, and Raz1. The RSSI values received by the X-axis, Y-axis, and Z-axis antennas of the interrogation signal 300 transmitted from the controller 12B are Rbx1, Rby1, and Rbz1, respectively.

The RSSI values for the respective axes are compared. For example, when all of Rax1> Rbx1, Ray1> Rby1, Raz1> Rbz1 are satisfied, the control circuit 111 of the responder 11 of Modification 3 has the larger RSSI value. Judge that it is close to the controller. In the above case, since the RSSI value of the interrogation signal 300 transmitted from the operation device 12A for all three axes is large, the control circuit 141 of the modified example 3 transmits from the operation device 12A on the side where the operation button 13A is operated. It may be determined that the RSSI value of the question signal 300 is large. Alternatively, paying attention to only the axis with the maximum value among Rax1, Ray1, and Raz1 (Rax2, Ray2, and Raz2), it is determined which operating unit side is present by comparing only one axis (Rax1> Rbx1). You may do it.
(4) Modification 4
In the second embodiment, the change in the RSSI value of the question signal 300 transmitted from the controller 12A or 12B having the stronger reception strength among the controllers 12A and 12B inside and outside the door 15 is used for the determination as it is. The method of leaving determination is not limited to this.

For example, a change in the RSSI value of the signal from the operation device with a lower reception intensity may be used, or the inquiry signal 300 transmitted from either one of the operation devices is not used but transmitted from both operation devices. The change in the RSSI value of the interrogation signal 300 to be asked may be within a certain value for the neglect determination.
(5) Modification 5
In the second embodiment, the responder 11 is in the sleep state when the responder 11 has been left unattended for a certain period of time. However, the responder 11 of Modification 5 that has been determined to be in the unattended state transmits the leave signal 700. The control circuit 141 that has received the neglect signal 700 from the responder 11 according to the modified example 5 may transmit the sleep instruction signal 600 via the operation device 12A or 12B to place the responder 11 in the sleep state. In addition, when the neglect signal 700 is received from the responder 11 of the modification 5, the control circuit 141 does not unlock the electric locks 18A and 18B.
Hereinafter, the description of points that are not changed from those shown in the second embodiment will be omitted, and the changed points will be described mainly.

<Configuration>
<Notification device>
The electric lock system 1 of the modified example 5 further includes a notification device that informs the person that the responder 11 of the modified example 5 can be sensed when the responder 11 is left unattended.
The notification device is, for example, a buzzer or an LED, and is connected to the control circuit 141 of the fifth modification. When the control circuit 141 of the fifth modification receives the neglect signal 700 from the responder 11 of the fifth modification, the buzzer sounds. Or turn on or blink the LED to call attention to people indoors.

<Control Circuit 111 of Responder 11 of Modification 5>
The control circuit 111 of the responder 11 according to the modified example 5 further includes a timer that measures the pause time. Thereby, the control circuit 111 can measure the elapse of the pause time, and performs a process of returning to the normal state when the pause time has elapsed.
<Data of sleep instruction signal 600 transmitted from operation devices 12A and 12B>
FIG. 10A is a diagram illustrating a data configuration of the sleep instruction signal 600 transmitted from the controller 12A or 12B.

The command 603 is a command that causes the responder 11 of the modification 5 to sleep, the pause time 604 is information that indicates the time for the responder 11 of the modification 5 to sleep, and the responder ID 606 identifies the responder that causes the sleeper to sleep. Information.
Since PR601, UW602, operating device ID 605, and CRC 607 are the same as PR301, UW302, operating device ID304, and CRC306 of the question signal 300, description thereof will be omitted.

<Data of neglected signal 700 transmitted from responder 11>
FIG. 10B is a diagram illustrating a data configuration of the neglected signal 700 transmitted from the responder 11 according to the fifth modification.
The flag 705 is a flag indicating whether or not the responder 11 of the modification 5 is in the neglected state. Hereinafter, as an example, the flag 705 is “1” when it is determined to be neglected, and “0” when it is not. And

<Operation>
FIG. 11 is a flowchart of the process of the control circuit 111 of the responder 11 according to the fifth modification when the neglect signal 700 is transmitted.
The determination as to whether or not it is left is the same as in the second embodiment, and a description thereof will be omitted.
When it is determined that the responder 11 of the modification 5 is left unattended in step S54 (step S54: Yes), the responder 11 generates a leave signal 700 in which “1” is set in the flag 705 of FIG. 10B (step S61). The neglect signal 700 is transmitted via the UHF transmission circuit 115 (step S62).

  When receiving the neglect signal 700, the control circuit 141 sets the command for instructing to enter the sleep state to the command 603, sets the time for maintaining the sleep state (for example, 5 minutes) to the pause time 604, and sets the flag 705 to neglect. A sleep instruction signal 600 is generated in which the identification information of the responder which is “1” indicating the state is set in the responder ID 606. Then, the sleep instruction signal is transmitted from the larger controller, that is, the controller 12A among the RSSI values of the interrogation signal 300 transmitted from the controllers 12A and 12B received by the responder 11.

  The control circuit 111 of the responder 11 of Modification 5 that has received the sleep instruction signal 600 compares the responder ID 606, which is the identification information of the responder included in the sleep instruction signal 600, with the identification information of its own responder. Then, it is determined whether or not it matches the identification information of the own device. When the information of the responder ID 606 matches the identification information of the own device, the own device is put into the sleep state for the time specified by the pause time 604. If they do not match, the responder 11 of the modified example 5 maintains the normal state.

To shift to the sleep state, the control circuit 111 sets the designated time in the built-in memory, switches the CPU clock to the low speed mode, and stops the power supply to the LF reception circuit 112, the UHF transmission circuit 115, and the display circuit 117. By doing.
Whether or not the set pause time has elapsed is measured by a timer, and after the pause time has elapsed, the control circuit 141 returns the CPU clock of its own device to the normal state, and the LF reception circuit 112, UHF transmission circuit 115 and display Supply power to the circuit.

  The responder 11 of the modified example 5 that has been put into the sleep state by the sleep instruction signal 600 returns to the normal state after the designated pause time has elapsed, and enters the state where the interrogation signal 300 can be received. For this reason, the control circuit 141 transmits the sleep instruction signal 600 and then designates the sleep instruction signal 600 in order to confirm whether or not the responder 11 of the modified example 5 that has returned from the sleep state is still in the neglected state. After the pause time has elapsed, a series of processing from step S41 is performed, and it is confirmed whether or not the responder 11 of the modified example 5 is in a neglected state.

According to this configuration, when the responder 11 of the modified example 5 is in a neglected state, the consumption of the power source 119 can be suppressed. In addition, since the sleep state is restored to the normal state after the designated time, when the state is no longer left, the sleep state is restored from the sleep state without operating the operation button 118 of the responder 11 as in the second embodiment. Can be made.
The control circuit 141 that has received the neglect signal 700 from the responder 11 of the modification 5 drives the notification device. For example, a buzzer is sounded or an LED is lit or blinked to alert a person in the room.

In this way, by notifying that the responder 11 of the modified example 5 is left behind, it is possible to prevent erroneous unlocking by avoiding a situation in which the responder 11 of the modified example 5 is left in the communication area of the question signal 300. .
(6) Modification 6
In each of the above-described first and second embodiments, the LF transmission circuit of the control unit 14 is configured to have a separate LF transmission circuit for each controller. However, as shown in FIG. A switch SW (switch) 148 may be used.

When transmitting the question signal 300, the control circuit 141 instructs the antenna switching SW 148 from which LF antenna to transmit the question signal 300, and the antenna switching SW 148 switches the LF antenna to be transmitted, 300 is transmitted.
According to this configuration, it is not necessary to provide an LF transmission circuit for each operation device, and the question signal 300 transmitted from each operation device can be controlled by one LF transmission circuit.
<4. Supplement>
Hereinafter, the configuration of the electric lock system as one embodiment of the present invention and its modifications and effects will be described.
(A) As shown in FIG. 1, an electric lock system according to an embodiment of the present invention includes a plurality of operating devices 12A and 12B having operation buttons 13A and 13B for controlling signal transmission, and signal strength of a received signal. A responder 11 having a measuring means, and a lock control device for unlocking on the condition that the operating device having the maximum measured intensity at the responding device is an operating device on the operating side of the door.

According to this configuration, when one of the operation devices is operated, each operation device transmits an interrogation signal. The responder receives the interrogation signal and measures the signal strength of the received signal from each controller. By comparing the signal intensity from each operation device, it is possible to determine whether or not the response device is on the operation device side on the operation side of the door, so that the unlocking of the electric lock can be prevented.
(B) The operation device may transmit a question signal including information indicating whether or not the operation device is an operation device located on the side on which the door opening operation is to be performed.

According to this configuration, the responder that has received the interrogation signal transmitted from the operation device can determine whether or not the interrogation signal is transmitted from the operation device located on the side on which the door opening operation is to be performed.
(C) The responder includes information indicating that the question signal having the maximum measurement intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed. In the case of transmitting a response signal and including information indicating that the question signal having the maximum measured intensity is from an operating device installed on the side where the door is not operated, the response signal Transmission may be suppressed, and the lock control device may perform the unlocking on the condition that a response signal from the responder has been received.

According to this configuration, as a result of receiving and comparing the signals from each operation device, the response device does not transmit a response signal when the signal strength of the received signal from the operation device not located on the operation side of the door is not maximum. Therefore, the power consumption of the responder can be suppressed.
(D) The responder determines whether or not the question signal having the maximum measured intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed, A response signal including information indicating the result of the determination is transmitted, and the lock control device transmits information indicating that the question signal having the maximum measured strength is from an operating device located on the side on which the door opening operation is to be performed. The unlocking may be performed on the condition that a response signal including the response signal is received from the responder.

According to this configuration, the responder compares the RSSI value of the received signal from each operating device and includes information on whether the signal strength of the received signal from the operating device not located on the operation side of the door is maximum. Send a response signal. In the lock control device that has received the response signal, whether the response signal is transmitted from an operation device located on the operation side of the door, and the received signal has the highest reception strength among the inquiry signals transmitted from each operation device. It is possible to determine whether or not the electric lock is unlocked.
(E) For each question signal from each of the operation devices, the responder includes information indicating whether or not the operation device that transmitted the question signal is located on the side on which the door opening operation is to be performed and the question signal. A response signal including the measurement value of the received intensity in association with each other, and the lock control device performs an operation corresponding to the maximum measurement value by comparing each measurement value included in the response signal received from the responder. It may be determined whether or not the container is located on the side where the door opening operation is to be performed, and the unlocking may be performed on the condition that the determination is positive.

According to this configuration, the responder can transmit the response signal including information that associates the reception intensity of the question signal received from the operation device and the operation device ID, and the lock control device that has received the response signal It can be determined whether or not the operating device corresponding to the maximum measured value is located on the operated side of the door. As a result, unlocking of the electric lock can be controlled and erroneous unlocking can be prevented.
Further, since the transponder does not compare or judge the reception intensity, the processing load of the transponder can be reduced.
(F) When each of the operating devices is operated to open the door, the question signal may include the identification information of the own device and be transmitted a plurality of times.

According to this configuration, the interrogation signal is transmitted a plurality of times from each controller, so that the average value of the received signals for a plurality of times can be used for measurement of the RSSI value of the received signal.
(G) When the door opening operation is performed, the operation signals may be transmitted in a transmission period in which the operating devices do not overlap each other.
According to this configuration, since the signals from the respective operating devices do not overlap, it is not necessary to change the transmission frequency.
(H) The transponder may include triaxial antennas orthogonal to each other, and the measurement value related to the measurement of the reception intensity may be a value obtained by combining the measurement values of the reception intensity related to the respective axis antennas. .

According to this configuration, the reception strength measurement uses a composite value of the signal strength received by the orthogonal three-axis antennas, so that no matter what direction the responder receives the interrogation signal, the direction of the responder Regardless of the reception intensity can be compared.
(I) The transponder includes three-axis antennas orthogonal to each other, and the measurement value related to the measurement of the reception intensity includes the value of the reception intensity for each axis antenna as an element. Of these, the interrogation signal with the maximum measurement strength may be an interrogation signal with the maximum reception strength value for any one or more of the three axes of antennas.

According to this configuration, comparison can be made without combining the signal intensities, so that the burden of comparison processing can be reduced.
(J) Each of the operating devices further periodically and repeatedly transmits a signal including its own identification information,
The responder may be configured not to transmit a response signal when reception strengths of a plurality of signals including the same identification information from one controller are kept within a certain range for a certain period.

According to this configuration, the transponder repeatedly receives signals from the operation unit, and when the variation of the reception intensity of each signal is within a certain range and continues for a certain period, the position and orientation of the transponder Since it can be determined that the state remains unchanged, in this case, it is possible to prevent erroneous unlocking of the electric lock by not transmitting a response signal.
(K) The responder puts its own device into a sleep state when reception strengths of a plurality of signals including the same identification information from one controller are kept within a certain range for a certain period. Also good.

According to this configuration, the responder puts itself into the sleep state when the fluctuation of the signal strength of the signal from the operating device is within a certain range for a certain period, so that the responder does not receive the interrogation signal. Or, even if it is received, the response signal is not transmitted, so that the unlocking of the electric lock can be prevented and the power consumption of the responder can be suppressed.
(L) The responder indicates a neglected signal indicating that it is in a neglected state when the reception intensity of a plurality of signals including the same identification information from one controller is maintained within a certain range for a certain period. The lock control device transmits a sleep instruction signal that causes the responder to sleep for a predetermined time in response to the transmission of the neglect signal from the responder, and transmits the sleep instruction signal to the controller. The received transponder may shift to the sleep state and return to the normal state when a certain time has elapsed after the transition.

According to this configuration, the responder puts itself into the sleep state for a certain period of time indicated by the interrogation signal, and returns to the normal state after the lapse of the certain period of time.
(M) The responder may include a display unit that displays different information when the sleeper is in the normal state.

According to this configuration, the user can check whether the responder is in the normal state or the sleep state.
(N) The responder may have an operation member for returning from the sleep state, and may return from the sleep state to the normal state when the operation member is operated.
According to this configuration, the user can put the responder in the sleep state until the user uses the responder, so that the power consumption of the responder can be suppressed.
(O) The responder indicates a neglected signal indicating that the responder is in a neglected state when the reception intensity of a plurality of signals including the same identification information from one controller is maintained within a certain range for a certain period of time. The electric lock system further includes a notifying device for notifying that the responder is in a neglected state in response to transmission of the neglected signal from the responder. May be.

According to this configuration, the transponder transmits a neglect signal when it is determined to be neglected in the communication area. Therefore, the electric lock system that has received the neglect signal causes the responder to be neglected by the notification device. You can notify people that you are.
(P) A responder of an electric lock system according to an embodiment of the present invention is a responder of an electric lock system including a plurality of operation devices, and receives an interrogation signal from the operation device. Measuring means for measuring the signal intensity of the signal and control means for controlling the transmission of the response signal based on the signal intensity measured by the measuring means.

According to this configuration, the transponder measures the signal strength of the received interrogation signal and controls the response signal, so that the unlocking of the electric lock can be controlled.
(Q) When the control means includes information indicating that the question signal having the maximum measured intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed. In the case of transmitting a response signal, if the question signal having the maximum measured intensity includes information indicating that the operation signal is not located on the side where the door opening operation is to be performed, the response signal is transmitted. You may make it suppress.

According to this configuration, the responder can determine whether or not the own device is on the operation device side that has been operated to open the door,
Since the response signal is not transmitted when the door is not on the side operated, unlocking can be prevented.
(R) The control means determines whether or not the question signal having the maximum measured intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed, A response signal including information indicating the determination result may be transmitted.

According to this configuration, the responder determines whether or not the own device is on the side of the operating device that has been operated to open the door from the received interrogation signal, and transmits the response signal including the determination result. The received system can be used for unlocking determination, and erroneous unlocking can be prevented.
(S) For each question signal from each operation device, the control means receives information related to the signal indicating whether or not the operation device that transmitted the signal is located on the side on which the opening operation is to be performed. A response signal including an intensity measurement value in association with each other may be transmitted.

  According to this configuration, the responder transmits a response signal including information in which the measured value of the reception intensity of each operation device is associated with the information indicating whether or not the device is located on the side where the door opening operation is to be performed. Therefore, the system that has received the response signal can compare signal strengths and prevent erroneous unlocking.

DESCRIPTION OF SYMBOLS 1 Electric lock system 11 Response machine 12A, 12B Operation device 13A, 13B, 118 Operation button 14 Control unit 15 Door 16 UHF reception circuit 18A, 18B Electric lock 111, 141 Control circuit 112 LF reception circuit 113 RSSI detection circuit 114, 145A, 145B LF antenna 115 UHF transmission circuit 117, 146A, 146B Display circuit 142, 142A, 142B LF transmission circuit 143A, 143B Electric lock drive circuit

Claims (18)

Two controls installed on the outside and inside of the door,
A responder for measuring the reception intensity of the interrogation signal from the two controllers;
An electric lock system comprising: a lock control device that unlocks on the condition that the operation device having the maximum measured intensity at the transponder is an operation device installed on the side to be opened. 2. The electric lock according to claim 1, wherein the operation device transmits an inquiry signal including information indicating whether or not the operation device is an operation device located on a side on which the door opening operation is to be performed. system. In the case where the responder includes information indicating that the question signal having the maximum measured intensity among the question signals from the respective operating devices is from the operating device located on the side on which the door opening operation is to be performed, When a response signal is transmitted and the information indicating that the question signal with the maximum measured intensity is from an operating device installed on the side where the door is not operated is included, transmission of the response signal is suppressed. And
The electric lock system according to claim 2, wherein the lock control device performs the unlocking on the condition that a response signal from the responder is received. The responder determines whether or not the question signal having the maximum measurement intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed, and Send a response signal containing information indicating the result,
The lock control device is based on the condition that a response signal including information indicating that the interrogation signal having the maximum measured intensity is from an operating device located on the side where the door opening operation is to be performed is received from the responding device. The electric lock system according to claim 2, wherein the unlocking is performed. For each of the interrogation signals from the operation devices, the responder includes information indicating whether the operation device that transmitted the interrogation signal is located on the side on which the door opening operation is to be performed and the reception intensity related to the interrogation signal. Send a response signal containing the measured value of
The lock control device determines whether or not the operating device corresponding to the maximum measured value is on the side on which the door opening operation is to be performed by comparing each measured value included in the response signal received from the responder. Then, the unlocking is performed under the condition that a positive determination is made. The electric lock system according to claim 2. The electric device according to any one of claims 1 to 5, wherein when each of the operating devices is operated to open the door, the question signal includes the identification information of the own device and is transmitted a plurality of times. Lock system. The electric lock system according to claim 6, wherein when the door is operated to open, the operation devices transmit the interrogation signal in a transmission period that does not overlap each other. The responder includes triaxial antennas orthogonal to each other.
The electric lock system according to claim 7, wherein the measurement value relating to the measurement of the reception intensity is a value obtained by combining the measurement values of the reception intensity relating to the respective antennas. The responder includes triaxial antennas orthogonal to each other.
The measurement value related to the measurement of the reception strength has a value of the reception strength for each axis antenna as an element,
The interrogation signal having the maximum measurement intensity among the interrogation signals from the respective operating devices is an interrogation signal having a maximum reception intensity value for any one of the three-axis antennas. Electric lock system. Each operating device further transmits a question signal including its own identification information periodically and repeatedly,
The responder does not transmit a response signal when reception strengths of a plurality of interrogation signals including the same identification information from one controller are kept within a certain range for a certain period. Item 2. The electric lock system according to Item 1. The responder puts the responder into a sleep state when reception strengths of a plurality of interrogation signals including the same identification information from one controller are kept within a certain range for a certain period. The electric lock system according to claim 10. The transponder transmits a neglected signal indicating that it is in a neglected state when the reception intensity of a plurality of interrogation signals including the same identification information from one controller is kept within a certain range for a certain period of time. And
The lock control device, in response to the transmission of the neglect signal from the responder, causes the operation device to transmit a sleep instruction signal that causes the responder to sleep for a predetermined time,
11. The electric lock system according to claim 10, wherein the transponder that has received the sleep instruction signal shifts to a sleep state and returns to a normal state when a predetermined time elapses after the shift. 13. The electric lock system according to claim 11, wherein the responder includes a display unit that displays different information depending on whether the responder is in a sleep state or a normal state. The responder has an operation member for returning from the sleep state,
The electric lock system according to claim 11 or 12, wherein when the operation member is operated, the normal state is restored from the sleep state. The transponder transmits a neglected signal indicating that it is in a neglected state when the reception intensity of a plurality of interrogation signals including the same identification information from one controller is kept within a certain range for a certain period of time. And
The electric lock system further includes a notification device that notifies that a person can sense that the responder is in a neglected state in response to transmission of the neglect signal from the responder. Item 11. The electric lock system according to Item 10. An electric lock system responder comprising a plurality of operating devices,
Measuring means for receiving an interrogation signal from the controller and measuring the signal strength of the interrogation signal;
Control means for controlling transmission of a response signal based on the signal intensity measured by the measuring means;
With
In the case where the control means includes information indicating that the question signal having the maximum measurement intensity among the question signals from the respective operating devices is from the operating device located on the side on which the door opening operation is to be performed, When a response signal is transmitted and the information indicating that the question signal with the maximum measured intensity is from an actuator that is not located on the side where the door opening operation is to be performed, transmission of the response signal shall be suppressed. A transponder characterized by. An electric lock system responder comprising a plurality of operating devices,
Measuring means for receiving an interrogation signal from the controller and measuring the signal strength of the interrogation signal;
Control means for controlling transmission of a response signal based on the signal intensity measured by the measuring means;
With
The control means determines whether or not the question signal having the maximum measured intensity among the question signals from the respective operating devices is from an operating device located on the side on which the door opening operation is to be performed, and A responder that transmits a response signal including information indicating a result. An electric lock system responder comprising a plurality of operating devices,
Measuring means for receiving an interrogation signal from the controller and measuring the signal strength of the interrogation signal;
Control means for controlling transmission of a response signal based on the signal intensity measured by the measuring means;
With
The control means includes, for each question signal from each of the operation devices, information indicating whether or not the operation device that has transmitted the question signal is located on the side on which the door opening operation is to be performed and the reception intensity related to the question signal. A responder characterized by transmitting a response signal that includes the measured value in association with each other.

Images