JP6238500B1 - Remote monitoring system - Google Patents

Abstract

Provided is a remote monitoring system capable of confirming the state of a site with a high-resolution image when an abnormality occurs while suppressing communication cost and power consumption. One of a plurality of monitoring devices provided with a monitoring camera connected to a communication control device is set as a parent device and the remaining as a child device, and between the child device and the parent device is set. Communication is performed by specific low power wireless communication by the LPWA communication module, and mobile communication is performed between the parent device and the network line 4. When the server 5 receives a request for acquiring image storage data of the monitoring camera in the monitoring area where the abnormality has occurred from a user who has received the abnormality signal from the monitoring camera at the terminal 12 via the server 5, the server 5 sends a request to the monitoring device 11. An image accumulation data acquisition request command is transmitted to the image storage data. The monitoring device 11 switches communication with the server 5 to mobile communication by the mobile communication module, and transmits the image accumulation data information to the server 5 without going through the parent device 10. [Selection] Figure 3

Description

  The present invention relates to a remote monitoring system using the Internet of Things (hereinafter referred to as “IoT”) technology. In particular, the present invention relates to a remote monitoring system capable of reducing a data communication fee when an IoT device having a wireless communication function is connected to the Internet.

Patent Document 1 discloses a remote image data acquisition system for acquiring image data necessary for confirming a situation such as a remote construction site.
That is, as described in FIG. 4 of Patent Document 1, the on-site terminal device 20 includes still image data indicating the on-site situation by operating the operating-side terminal device 30 that is remote from the on-site site. It can be captured and acquired by a camera, and still image data can be transmitted with high resolution.

In such a remote image data acquisition system, in order to transmit still image data with high resolution, it is necessary to connect the site side terminal device 20 to the operation side terminal device 30 through a wired high-speed Internet line via a wireless LAN in the construction site. was there.
However, when the number of site side terminal devices 20 is small or the installation range is narrow, it is possible to acquire remote image data and send it to the operation side terminal device even with such a system. In this case, it is necessary to install several tens of monitoring devices with cameras, which are on-site terminal devices, and several hundreds when there are many, and acquire image data in the track.
In such a case, in the outdoor line, the monitoring device must be capable of being driven by a battery, and the battery cannot be replaced frequently, so that low power consumption is required.

In recent years, 3G / LTE, which is a mobile communication technology, has been established as an infrastructure for high-speed wireless communication, and a monitoring device based on IoT using this has been experimentally operated.
There are roughly two types of methods for connecting a monitoring device, which is an IoT device, to the Internet. One is a “direct communication method” and the other is a “gateway method”.

FIG. 1 shows a case of a “direct communication system” in which a monitoring device 1 including a camera, a sensor, and the like is directly wirelessly connected to the Internet.
The monitoring device 1 includes a mobile communication module 2 for wireless communication, and is connected to the Internet 4 as a network line via a base station 3 by a 3G / LTE line.
However, in the case of the direct communication method, communication cost becomes a bottleneck because it is always connected. When using a 3G line or LTE line developed by a mobile phone operator, even if negotiating a price cut with a relative fee, a cost of about 300 to 500 yen per month is required. When converted to the year, it costs at least 3,600 yen / line, and if there are several dozens to several hundreds of monitoring devices, a huge cost will be required. In addition, it is not always necessary to communicate with the monitoring device 1 at high speed, and detailed image information and the like need only be communicated at high speed only when an abnormality occurs in the monitoring target. You are consuming the fee.
In addition, since a broadband line such as 3G / LTE requires a large amount of power, this direct communication method is not suitable for yearly use in a monitoring device driven by a battery outdoors.

  In order to solve the problems of the cost and power consumption of the direct communication method, introduction of the “gateway method” described below is being studied. An IoT device used as an object communicates with a device serving as a gateway to the Internet by using a specific low-power wireless communication technology without using IP (Internet Protocol). Since it is non-IP communication, it is necessary to convert the exchange with the Internet at the gateway. A feature of this “gateway method” is that a IoT device is equipped with functions such as a minimum necessary sensor and adopts a communication method with low power consumption. The gateway plays a role of converting non-IP and IP connections when viewed from the IoT device side, and plays a role of a router of the IoT device when viewed from the Internet side.

FIG. 2 shows a case of the “gateway method” in which the monitoring device 1 including a camera and a sensor is connected to the Internet via a gateway.
The monitoring device 1 is an LPWA communication module for low power wide area (hereinafter referred to as “LPWA”) communication that realizes long-distance communication with low power consumption, which is one of specific low-power wireless communication technologies, for example. 6 and communicates with the gateway 7 by LPWA, and is connected to the Internet 4 from the gateway 7 by wire or wireless (mobile communication).
Thereby, the communication cost between the monitoring apparatus 1 and the gateway 7 is not applied, and the power consumption of the monitoring apparatus 1 can be reduced.

JP 2003-87774 A

However, the above gateway method is excellent in terms of communication cost and power consumption, but when an abnormality occurs in the monitoring area, the situation in the field is confirmed using a high-resolution still image or video. There is a problem that LPWA communication cannot be used when necessary. That is, the amount of data and the communication speed that can be communicated with LPWA are not suitable for high-resolution video transfer.
In a remote monitoring system using a monitoring device equipped with a monitoring camera, when an abnormality occurs, it is required to check the situation of the site with a continuous video. There is a problem with "method".

  The present invention was made in order to solve the problems in the remote monitoring system using the IoT technology as described above, and when an abnormality occurs while suppressing communication cost and power consumption, An object of the present invention is to provide a remote monitoring system capable of confirming images with high-resolution images (including moving images).

The present invention controls a plurality of monitoring devices, gateway devices connected to the monitoring devices, a server in which an application for controlling the monitoring devices is stored, and the monitoring devices by accessing the servers. A remote monitoring system in which a user terminal capable of communication is connected to be communicable with each other via a network line, and the gateway device and the network line are connected by wire or wirelessly, and the monitoring device Is a communication control device incorporating a mobile communication module and a specific low-power wireless communication module, and is connected to the communication control device, acquires an image of a monitoring area, and detects whether an abnormality has occurred from the acquired image A monitoring camera capable of delivering an abnormal signal to the server via the communication control device when an abnormality is detected. Moni,
Communication between the communication control device and the gateway device is performed by specific low power wireless communication by the specific low power wireless communication module, and the abnormality is received from the user who has received the abnormal signal at the terminal via the server. When the server receives an acquisition request for image accumulation data of a monitoring camera in the monitoring area where
The server transmits an acquisition request command for the image accumulation data to the communication control device that has delivered the abnormal signal,
Said communication control apparatus receiving the said mounting resulting request command is switched communications between the server to the mobile communication by the mobile communication module, transmits the image data stored in the server via the network line by the mobile communication It is characterized by doing.

The present invention also includes a plurality of monitoring devices, a server storing an application for controlling the monitoring device, and a user terminal capable of controlling the monitoring device by accessing the server. A remote monitoring system connected to be able to communicate with each other via a network line,
The monitoring device includes a communication control device including a gateway, a mobile communication module, and a specific low-power wireless communication module, and is connected to the communication control device, acquires an image of a monitoring area, and an abnormality occurs from the acquired image And a monitoring camera capable of delivering an abnormality signal to the server via the communication control device when an abnormality is detected.
One of the plurality of monitoring devices is selected based on a predetermined condition, the gateway of the communication control device of the selected monitoring device is enabled to be a parent device, and all other monitoring devices are child devices With
Communication between the slave unit and the master unit is performed by specific low-power radio communication by the specific low-power radio communication module, and mobile communication is performed between the master unit and the network line,
When the server receives an acquisition request for image accumulation data of a monitoring camera in a monitoring area where the abnormality has occurred, from the user who has received the abnormality signal at the terminal via the server,
The server transmits an acquisition request command for the image accumulation data to the communication control device that has delivered the abnormal signal,
Said communication control apparatus receiving the said mounting resulting request command is switched communications between the server to the mobile communication by the mobile communication module, transmits the image data stored in the server via the network line by the mobile communication It is characterized by doing.

  Further, in the remote monitoring system according to the present invention, the monitoring device acquires the weather data of the monitoring area, detects presence / absence of abnormality from the acquired weather data, and detects the abnormality when the communication is detected. A weather sensor capable of delivering an abnormal signal to the server via a control device, and monitoring the monitoring area where the abnormality has occurred from the user who received the abnormal signal at the terminal via the server When the server receives a request for acquiring the current image of the camera, the server transmits the current image acquisition request command to the communication control apparatus that has delivered the abnormal signal, and receives the acquisition request command. The communication control apparatus switches the communication with the server to the mobile communication by the mobile communication module, and performs the mobile communication without using the base unit. And transmitting the current image to the server via the network line Te.

Still further, in the remote monitoring system according to the present invention, the communication control device includes radio wave intensity measuring means for measuring radio wave intensity of mobile communication, and transmits the radio wave intensity measured by the radio wave intensity measuring means to the server. In addition, when the radio field strength of the base unit becomes a predetermined value or less, the server sets the base unit with the strongest radio field strength among the slave units, and sets the original base unit as the base unit. It is characterized by changing to.
As a result, when the radio signal strength of the mobile communication of the master unit decreases, the master unit can be changed to a slave unit, and the slave unit with the highest radio field strength among other slave units can be changed to the master unit. Stable mobile communication can be ensured.

  Furthermore, in the remote monitoring system according to the present invention, when the power is turned on, the communication control device communicates with the server by mobile communication by the mobile communication module, and sets the monitoring camera by the terminal. It is characterized by having an initial setting mode that enables this.

  In addition, the remote monitoring system according to the present invention includes a plurality of groups consisting of one master unit and a plurality of slave units that are linked to the master unit and perform specific low-power wireless communication with the master unit. In the remote monitoring system, the mobile communication radio wave intensity of all the monitoring devices in the one group is less than a predetermined value, and is preset for emergency communication from the parent device of the group A master unit that broadcasts an emergency signal to another group via the common channel for specific low-power communication and that is associated with a slave unit of a neighboring group that has received the emergency signal And performing mobile communication with the server via the network.

  According to the remote monitoring system having the above-described configuration, when an abnormality occurs in the monitoring area, it is possible to check the situation in the field with high-resolution images (including moving images) while suppressing communication costs and power consumption. Become.

It is a figure which shows the example (direct communication system) of the conventional remote monitoring system. It is a figure which shows the other example (gateway system) of the conventional remote monitoring system. It is a block diagram which shows the whole structure of the remote monitoring system which concerns on this invention. It is a block diagram which shows an example of the hardware constitutions of a monitoring apparatus. It is a figure which shows the example of the sequence of the initial setting of the remote monitoring system which concerns on this invention. It is a figure which shows the example of the sequence at the time of steady of the remote monitoring system which concerns on this invention. It is a figure which shows the example of the sequence at the time of the weather abnormality in the remote monitoring system which concerns on this invention. It is a figure which shows the example of the sequence at the time of abnormal event generation | occurrence | production in the remote monitoring system which concerns on this invention. It is a figure for demonstrating the relay mode in the remote monitoring system which concerns on this invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 3 is a block diagram showing the overall configuration of the remote monitoring system according to the present invention.
In FIG. 3, one of the monitoring devices is set as the parent device 10 and the remaining plurality of monitoring devices are set as the child device 11, and one of the specific low power wireless communication technologies between the parent device 10 and the child device 11. A star connection is established with LPWA communication that realizes long-distance communication with a certain low power consumption. Here, “LoRa” (trademark of Semtech Corporation, International Registration No. 1262667) proposed by the LoRa Alliance, which is a kind of LPWA, is used.

  Base unit 10 is always connected to a network line (hereinafter referred to as “Internet”) 4 via a mobile phone base station (hereinafter referred to as “base station”) 3 by 3G / LTE communication (hereinafter referred to as “mobile communication”). Has been. Also connected to the Internet 4 are a server 5 storing an application for controlling the monitoring devices 10 and 11 and a user terminal 12 capable of controlling the monitoring devices 10 and 11 by accessing the server 5. Has been.

FIG. 4 is a block diagram illustrating an example of a hardware configuration of the monitoring devices 10 and 11.
In FIG. 4, the monitoring devices 10 and 11 include a communication control device 20 and a monitoring camera 27 and a weather sensor 28 connected thereto.
Furthermore, the communication control device 20 includes a mobile communication module 21, a gateway 22, an LPWA communication module 23, a control unit 24, a camera I / F 25, and a sensor I / F 26.

Among these, the mobile communication module 21 is a module having a function of performing mobile communication with the Internet 4. A publicly known mobile communication module can be used. For example, a product “WLSLQ50” of SoftBank Corp. can be used.
The gateway 22 has a function of performing protocol conversion for communication with the Internet. It may be configured by software.

The LPWA communication module 23 is a module having a function for performing communication with the parent device 10. As the LPWA communication module, for example, an LoRa module “ES920LR” (manufactured by EASEL Co., Ltd.) for LoRa can be used.
LoRa has a feature that it can communicate using a low-power radio wave over a long distance of up to 8 km. In addition, since the power is consumed as the distance becomes longer, the arrangement distance is determined in consideration of the battery performance. In the case of track monitoring, it is installed every 70m. The frequency used is the 920 MHz band that can be used by specific low-power radio stations that do not require a license in Japan. This band is a frequency lower than the 2.4 GHz band used in Wifi (registered trademark) and the like, and it can travel long distances and go around buildings, and is affected by the influence of rain and radio wave interference. Hateful.

The control unit 24 includes a CPU 24a, a RAM 24b, and a ROM 24c, and is a control unit that controls the communication control apparatus 20 as a whole. The CPU 24a executes a required program stored in the ROM 24c, etc., and switches between mobile communication and LPWA communication to connect to the Internet 4 or transmits an image of the monitoring camera 27 and data of the weather sensor 28 to the master unit 10. It has a function to do.
The control unit 24 also functions as a radio wave intensity measuring unit that measures the radio wave intensity of the mobile communication module 21 in cooperation with a radio wave intensity sensor (not shown).

The camera I / F 25 is an interface for connection with the surveillance camera 27. The sensor I / F 26 is an interface for connection with a weather sensor.
In addition, the monitoring camera 27 acquires an image of the monitoring area, detects whether an abnormality has occurred from the acquired image, and distributes an abnormality signal to the server 5 via the communication control device 20 when an abnormality is detected. It has. As the monitoring camera 27, a known camera equipped with an image recognition function can be used. Note that the monitoring camera 27 includes storage means (not shown) such as an SD memory card for storing images (including moving images).
Further, the weather sensor 28 is a device that can acquire weather data such as temperature and humidity, rainfall, atmospheric pressure, and wind speed. The weather sensor 28 acquires weather data in the monitoring area, detects whether or not an abnormality has occurred from the acquired weather data, and distributes an abnormality signal to the server 5 via the communication control device 20 when an abnormality is detected. Is provided. The weather sensor 28 includes storage means (not shown) such as an SD memory card for storing measured weather data.

  The parent device 10 and the child device 11 are also the same hardware, but under predetermined conditions (for example, the radio wave intensity of mobile communication is the strongest, and is located at the center of all monitoring devices). Based on this, the base unit 10 is set. Specifically, the function of the gateway 22 is enabled to serve as a master unit, and the function of the gateway 22 of another monitoring device is disabled to function as the slave unit 11. One feature of the remote monitoring system according to the present invention is that a monitoring device that functions as the parent device 10 can be selected as appropriate.

When the server 5 receives a request from the user who has received an abnormal signal from the monitoring camera 27 from the parent device 10 via the server 5 at the terminal 12, the server 5 receives an acquisition request for image storage data of the monitoring camera in the monitoring area where the abnormality has occurred. Transmits an acquisition request command for image accumulation data to the communication control device 20 that has delivered the abnormal signal, and the communication control device 20 that has received the acquisition request command performs communication with the server 5 using a mobile communication module. The gateway 22 is enabled to switch to communication, and the image storage data is transmitted to the server 5 via the Internet 4 by mobile communication without passing through the parent device 10. Hereinafter, this sequence will be described.

FIG. 5 is a diagram showing an example of an initial setting sequence of the remote monitoring system according to the present invention.
First, a user at the installation site reads a QR code (registered trademark) attached to the parent device 10 with a terminal (in this case, for example, a smart phone with a camera function), and an ID attached to the parent device. Is read (S101). Similarly, the QR code (registered trademark) attached to the slave unit is read by the terminal, and the ID attached to the slave unit is read (S102).
The user accesses the server, displays the login screen of the control app of the monitoring device (S103), and logs in using his / her user ID and password (S104). If the ID of the parent device is registered in the system, the authentication is OK (S105). If the ID of the child device is registered, the authentication is OK (S106).
Then, registration of the slave unit linked to the determined master unit is performed from the terminal (S107). When the association registration is completed, the content of “main device / child device association registration” is displayed on the terminal screen (S108). In this way, all monitoring devices except the parent device are registered as child devices (S109).
When the association between the parent device and the child device is completed, a single group is formed centering on the parent device, and the group is registered with a name (S110).

Then, the terminal 12 inputs the data collection interval (meteorological data, solar cell power generation amount, power storage amount, radio wave intensity information, normal signal, etc.) collection setting and upload interval setting to the server (S111). The server 5 transmits the information to the parent device and sets the parent device (S112).
Next, the radio wave intensity information of the mobile communication is uploaded (UP) using the mobile communication from the slave unit to the server 5 (S113). This is because, as will be described later, it is necessary to check whether there is sufficient radio field strength in order to perform initial setting of the monitoring camera connected to the slave unit via the server from the terminal. Note that all the communication control devices can communicate with the server 5 by mobile communication because the gateway 22 is enabled when the power is turned on regardless of the master unit / slave unit.

Next, the setting registration of the surveillance camera connected to the parent device is performed from the terminal (S114). Upon receiving the setting registration command from the terminal, the server exchanges the monitoring camera setting information with the parent device (S115). The base unit performs initial setting of the monitoring camera based on the setting information (S116).
Next, similarly, the setting registration of the surveillance camera connected to the slave unit is performed from the terminal (S117). Upon receiving the setting registration command from the terminal, the server exchanges the monitoring camera setting information with the slave unit (S118). The slave unit performs initial setting of the monitoring camera based on the setting information (S119). When the initial setting of the monitoring camera is completed, an initial setting completion command is sent from the terminal 12 via the server 5 (S120) to the child device (S121), and the CPU 24a of the child device enables the gateway 22 of the child device. The state (hereinafter referred to as “GW mode”) is returned to the disabled state (hereinafter referred to as “child device mode”) (S122). Thereafter, the steady state is entered.

FIG. 6 is a diagram showing an example of a sequence at a normal time (a time during which no abnormality occurs) of the remote monitoring system according to the present invention.
The parent device periodically collects data from the child device (S201). The collection timing is as set in the initial setting. The surveillance camera connected to the slave unit is constantly monitored, and a normal operation signal is sent to the slave unit (unless an abnormality occurs) (S202). A normal operation signal of the camera is sent to the parent device by LPWA communication (S203). The normal operation signals of all the slave units are sent from the master unit to the server 5 by mobile communication (S204) and stored in the server 5.

Similarly, the power generation amount information of a solar cell (not shown) connected to the slave unit is sent to the master unit by LPWA communication (S205). The power generation amount information of the solar cells of all the slave units is sent from the master unit to the server 5 by mobile communication (S206) and stored in the server 5.
Similarly, the power generation amount information of a solar cell (not shown) connected to the slave unit is sent to the master unit by LPWA communication (S205). The power generation amount information of the solar cells of all the slave units is sent from the master unit to the server 5 by mobile communication (S206) and stored in the server 5.
Further, the storage amount information of a storage battery (not shown) connected to the slave unit is sent to the master unit by LPWA communication (S207). The storage amount information of the solar cells of all the slave units is sent from the master unit to the server 5 by mobile communication (S208) and stored in the server 5.

Next, the radio field strength information of the mobile communication (3G / LTE) of the slave unit is sent from the slave unit to the master unit by LPWA communication (S209). The radio field intensity information of all the slave units is sent from the master unit to the server 5 by mobile communication (S210) and stored in the server 5. This radio wave intensity information is used as reference information when the radio wave intensity of the parent device becomes equal to or lower than a predetermined value and a strong radio wave intensity is selected from the slave units and changed to the parent machine.
In addition, the radio field strength information of the mobile communication of the parent device is also sent to the server by mobile communication (S211).

On the other hand, from the weather sensor connected to the slave unit, the information measured by the weather sensor is sent to the slave unit (S212), and the slave unit sends the information to the master unit by LPWA communication (S213). They are sequentially transmitted to the server by mobile communication (S214).
Further, the surrounding situation where the master unit is placed is imaged by the surveillance camera connected to the master unit, and the master unit uploads the image to the server 5 by mobile communication (S215). The server displays the image on the terminal (S216).
When the user requests information to be viewed from the terminal (S217), the server displays necessary information on the screen of the terminal (S218). When the necessary data is requested in the CSV format (S219), the server converts the necessary data into the CSV format so that it can be downloaded from the terminal (S220).

FIG. 7 is a diagram showing an example of a sequence at the time of abnormal weather in the remote monitoring system according to the present invention.
When a rainfall or wind speed abnormality signal is transmitted from the weather sensor to the slave unit (S301), the slave unit uploads the weather abnormality signal to the master unit by LPWA communication (S302). The master unit uploads the weather abnormality signals of all the slave units to the server by mobile communication (S303).
The server notifies the terminal of a weather abnormality alarm based on the weather abnormality signal (S304).

When the user who has received the weather abnormality alarm at the terminal sends a request for acquiring the current image (camera image confirmation request) of the monitoring camera in the monitoring area where the weather abnormality has occurred (S305), the server requests the camera image confirmation. Is transmitted to the parent device (S306), and the parent device transmits a camera image confirmation request to the child device that has delivered the abnormal signal by LPWA communication (S307).
The CPU 24a of the slave unit that has received the camera image confirmation request command enables the gateway 22 to enter the GW mode, switches the communication with the server to the mobile communication by the mobile communication module (S308), and does not go through the base unit. The current camera image can be transmitted to the server by communication.

Next, the slave unit requests the surveillance camera to transmit the current camera image (S309), and the requested surveillance camera transmits the current camera image to the slave unit (S310).
The child device uploads the current camera image directly to the server (without passing through the parent device) via mobile communication (S311). The server displays the image on the terminal (S312), and when the user who viewed the image completes the display of the camera image (S313), an UP stop command for the current camera image is sent from the server to the child device by mobile communication ( In step S314, the slave unit instructs the monitoring camera to stop transmission of the current camera image (S315). At the same time, the CPU 24a of the slave unit disables the gateway 22 and returns to the slave unit mode (S316). The handset then returns to a steady state.

FIG. 8 is a diagram showing an example of a sequence when an abnormal event occurs in the remote monitoring system according to the present invention.
When an abnormal event such as the entry of a person or the fall of a foreign object occurs in the monitoring target area, the monitoring camera determines that there is an abnormality by image recognition or the like, and transmits an abnormal signal to the slave unit (S401). When an abnormal signal is transmitted from the monitoring camera to the slave unit, the slave unit uploads the abnormal signal to the master unit by LPWA communication (S402).
At the same time, the slave unit requests the monitoring camera to save the moving image from 5 seconds before the occurrence of the abnormality to the time of occurrence (S403), and requests the accumulation of moving image data for 60 seconds after the occurrence of the abnormality (S404). .

The parent device that has received the abnormality signal from the child device uploads the abnormality signals of all the child devices in which the abnormality has occurred to the server 5 by mobile communication (S405). The server 5 notifies the terminal of an abnormality alarm based on the abnormality signal of all the slave units in which an abnormality has occurred (S406).
When the user who has received the abnormality alarm at the terminal sends an image confirmation request for the monitoring camera in the monitoring area where the abnormality event has occurred to the server (S407), the server sends a camera image confirmation request to the parent device (S408). The machine transmits a camera image confirmation request to the slave unit that has delivered the abnormal signal by LPWA communication (S409).
The CPU 24a of the slave unit that has received the camera image confirmation request command enables the gateway 22 to enter the GW mode, switches the communication with the server to the mobile communication by the mobile communication module (S410), and does not go through the base unit. The current camera image can be transmitted to the server by communication.

Next, the slave unit requests the monitoring camera to transmit the current camera image (S411), and the requested monitoring camera transmits the current camera image to the slave unit (S412).
The child device uploads the current camera image directly to the server (without passing through the parent device) via mobile communication (S413). The server displays the image on the terminal (S414).
When the user who has viewed the image further requests a video from 5 seconds before the occurrence of the abnormality to the time of occurrence (hereinafter referred to as “video from 5 seconds before the abnormality”) (S415), the server requests the video from 5 seconds before the abnormality. Is performed by mobile communication to the slave unit (S416).
The slave unit that has received the moving image request from 5 seconds before the abnormality makes a moving image request from 5 seconds before the abnormality to the monitoring camera (S417). Therefore, the surveillance camera transmits a moving image from 5 seconds before the abnormality to the child device (S418), and the child device uploads the moving image from 5 seconds before the abnormality to the server 5 by mobile communication (S419).
The server displays the received moving image from 5 seconds before the abnormality on the terminal (S420).

When a user who has viewed a moving image from 5 seconds before the abnormality requests further moving image data for 60 seconds after the occurrence of the abnormality (hereinafter referred to as “moving image for 60 seconds after the abnormality”) (S421), the server moves the moving image for 60 seconds after the abnormality. A request is made to the slave unit by mobile communication (S422).
The slave unit that has received the moving image request for 60 seconds after the abnormality makes a moving image request for 60 seconds after the abnormality to the surveillance camera (S423). Therefore, the surveillance camera transmits a moving image for 60 seconds after the abnormality to the child device (S424), and the child device uploads the moving image for 60 seconds after the abnormality to the server 5 by mobile communication (S425).
The server displays the received moving image for 60 seconds after the abnormality on the terminal (S426).
When the display of the camera image is completed (S427), a camera image UP stop command is sent from the server to the slave unit by mobile communication (S428), and the slave unit requests the surveillance camera to stop the transmission of the camera image (S429). ). At the same time, the CPU 24a of the slave unit disables the gateway 22 and returns to the slave unit mode (S430). The handset then returns to a steady state.

FIG. 9 is a diagram for explaining the relay mode in the remote monitoring system according to the present invention.
Relay mode means that even if there is a failure in the mobile communication line or a decrease in radio field strength, such as weather conditions, it realizes information relay using robust LPWA communication and can communicate via different groups in close proximity It is a function to notify the occurrence of abnormal events from the master unit without leaking.

In FIG. 9, for example, when the base station 10A of the group A decreases in radio wave intensity of mobile communication due to bad weather or the like and becomes communication NG, the server is the highest radio wave intensity among the slave units 11A in the same group. If there is no problem when there is no such slave unit in the same group, there is no problem if the original master unit can be changed to a slave unit. .
In this case, the emergency information broadcast by the LPWA communication from the master unit 10A is configured to cover the transmission area in the other group B slave units 11B adjacent to each other, so that the slave unit can always be received. 11B is utilized.

Using this, it broadcasts by LPWA communication (that it is in trouble), and the slave unit 11B of the adjacent group B receiving it understands the emergency situation, for example, a channel to which emergency information is assigned as an emergency line Is used to relay information to the group where there is a parent device that is operating normally, and the emergency information is sent to the server 5 via the parent device that is operating normally (in this case, the parent device 10B is normal). UP.
As a result, for example, even if mobile communication cannot be used in a certain area due to heavy rain, emergency information is relayed by LPWA communication, and is not affected by rain. Although a slight delay occurs, a robust long-distance network can be configured with this mechanism, and reliable information communication is possible.

Although the description of the embodiment is finished as described above, in the present invention, the specific configuration of each device, the contents of processing, the configuration of data, the number of devices used, and the like are not limited to those described in the embodiment. .
For example, the gateway function in the steady state is fulfilled by the master unit 10 selected from a plurality of monitoring devices, but it is connected to the Internet by wire or wireless (mobile communication) using a dedicated gateway device. Also good. The server 5 may be either a self-supporting server or a cloud server.
In addition, the monitoring device ID is read by reading the QR code (registered trademark) at the time of initial setting of the monitoring device, but it may be an RFID tag or a list of items linked from the beginning. , You may carry it on site and install it.
Furthermore, although the power supply of the monitoring device has been described in the case of a solar battery, the power supply is not limited to this, and may be configured by a power supply in which alternating current is converted into direct current, and a storage battery (secondary battery) connected to the power supply. .
The terminal is preferably a mobile terminal, but may be a wired terminal.

3: base station, 4: network line, 5: server, 10: monitoring device (master device), 11: monitoring device (slave device), 12: terminal, 20: communication control device, 21: mobile communication module, 22: Gateway: 23: LPWA communication module, 24: Control unit, 27: Monitoring camera, 28: Weather sensor

Claims (9)

A plurality of monitoring devices, gateway devices connected to the monitoring devices, a server storing an application for controlling the monitoring devices, and a user who can control the monitoring devices by accessing the servers A remote monitoring system connected to each other via a network line so that they can communicate with each other,
The gateway device and the network line are connected by wire or wirelessly,
The monitoring device includes a communication control device including a mobile communication module and a specific low-power wireless communication module, and is connected to the communication control device, acquires an image of a monitoring area, and whether or not an abnormality has occurred from the acquired image And a monitoring camera capable of delivering an abnormality signal to the server via the communication control device when an abnormality is detected,
Communication between the communication control device and the gateway device is performed by specific low power wireless communication by the specific low power wireless communication module, and the abnormality is received from the user who has received the abnormal signal at the terminal via the server. When the server receives an acquisition request for image accumulation data of a monitoring camera in the monitoring area where
The server transmits an acquisition request command for the image accumulation data to the communication control device that has delivered the abnormal signal,
Said communication control apparatus receiving the said mounting resulting request command is switched communications between the server to the mobile communication by the mobile communication module, transmits the image data stored in the server via the network line by the mobile communication A remote monitoring system characterized by: A plurality of monitoring devices, a server storing an application for controlling the monitoring device, and a user terminal capable of controlling the monitoring device by accessing the server are mutually connected via a network line. A remote monitoring system communicably connected to
The monitoring device includes a communication control device including a gateway, a mobile communication module, and a specific low-power wireless communication module, and is connected to the communication control device, acquires an image of a monitoring area, and an abnormality occurs from the acquired image And a monitoring camera capable of delivering an abnormality signal to the server via the communication control device when an abnormality is detected.
One of the plurality of monitoring devices is selected based on a predetermined condition, the gateway of the communication control device of the selected monitoring device is enabled to be a parent device, and all other monitoring devices are child devices With
Communication between the slave unit and the master unit is performed by specific low-power radio communication by the specific low-power radio communication module, and mobile communication is performed between the master unit and the network line,
When the server receives an acquisition request for image accumulation data of a monitoring camera in a monitoring area where the abnormality has occurred, from the user who has received the abnormality signal at the terminal via the server,
The server transmits an acquisition request command for the image accumulation data to the communication control device that has delivered the abnormal signal,
Said communication control apparatus receiving the said mounting resulting request command is switched communications between the server to the mobile communication by the mobile communication module, transmits the image data stored in the server via the network line by the mobile communication A remote monitoring system characterized by: Further, the monitoring device acquires meteorological data of the monitoring area, detects whether or not an abnormality has occurred from the acquired weather data, and detects an abnormality to the server via the communication control device when the abnormality is detected. Equipped with a weather sensor capable of delivering
When the server receives a request for acquiring a current image of a monitoring camera in a monitoring area where the abnormality has occurred from the user who has received the abnormality signal at the terminal via the server,
The server transmits an acquisition request command for the current image to the communication control device that has delivered the abnormal signal,
Said communication control apparatus receiving the said mounting resulting request command is switched communications between the server to the mobile communication by the mobile communication module, transmitting the current image to the server via the network line by the mobile communication The remote monitoring system according to claim 1 or 2, characterized in that: The communication control device includes a radio wave intensity measuring unit that measures a radio wave intensity of mobile communication, and transmits the radio wave intensity measured by the radio wave intensity measuring unit to the server.
When the server has a radio field strength of a predetermined value or less, the server sets the master unit having the highest radio field strength as the master unit, and changes the original master unit to the slave unit. The remote monitoring system according to claim 2 .   The communication control device has an initial setting mode that enables communication with the server by mobile communication by the mobile communication module and setting of the monitoring camera by the terminal when the power is turned on. The remote monitoring system according to any one of claims 2 to 4. 5. The remote monitoring system according to claim 4 , wherein there are a plurality of groups consisting of one master unit and a plurality of slave units linked to the master unit and performing specific low power wireless communication with the master unit. When the mobile communication radio wave intensity of all the monitoring devices in the one group becomes a predetermined value or less, the common channel for the specific low power communication set in advance for emergency communication from the parent device of the group. Broadcast emergency signals to other groups via
A remote monitoring system that performs mobile communication with the server from a slave unit in a neighboring group that has received the emergency signal via a master unit to which the slave unit is linked.   The remote monitoring system according to claim 1, wherein a power source of the monitoring device is a solar battery.   The remote monitoring system according to any one of claims 1 to 6, wherein the power source of the monitoring device is a power source obtained by converting alternating current into direct current, and a storage battery (secondary battery) is connected to the power source. The remote monitoring system according to claim 1, wherein the terminal is a mobile terminal.