JP2018133676A - Disaster prevention radio system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which in order to make a disaster prevention radio system multifunctional and secure communication means in an emergency, making a communication path to multiple routes and the like are required, which, however, makes the system large in scale.SOLUTION: In a disaster prevention radio system, a master station performs first communication with loudspeaker slave stations or individual receivers through a first communication path. Specific small power radio repeaters having a gateway function are provided at the individual receivers or the loudspeaker slave stations, and thereby the individual receivers or the loudspeaker slave stations are made to be able to perform second communication with the master station through a second communication path.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an improvement of a disaster prevention radio system used in a municipal disaster prevention administrative radio network.

The disaster prevention radio system is installed in facilities such as a master station established in an administrative agency and a slave station (speaking slave station) equipped with a loudspeaker provided at a predetermined point in the area under the jurisdiction of the administrative agency and a residence. The information from the master station according to the area such as emergency information such as disaster warnings and warnings, hourly reports, administrative information, etc. is received by the loudspeaker slave station and the door-to-door receiver, It is useful for the distribution of various information by outputting as character information.
This disaster-prevention radio system provides audio information unilaterally from a master station to a loudspeaker station or a door-to-door receiver. It has been promoted to add a new function to such a disaster prevention radio system to increase the existence value of the disaster prevention radio system. For example, a video surveillance system is linked to a disaster prevention radio system, and image information that is useful for grasping the situation of disasters, searching for elderly people and finding suspicious individuals is obtained from the video, and the orientation or magnification of the video surveillance system camera is controlled. It has been proposed (Patent Document 1).

JP, 2006-5237, A

  In order to realize various administrative services, efforts are being made to combine various technologies with a disaster prevention radio system to make it multifunctional, such as combining a video surveillance system as shown in Patent Document 1.

  However, there is a problem that the economic load for capital investment increases when the system becomes large with multi-function. On the other hand, because of the importance of information communication in an emergency, in order to secure communication means in an emergency, there is a need for risk distribution in information communication facilities, multi-route communication paths, backup measures using radio, promotion of digitalization, etc. It has been. In addition, as an administrative service in normal times, for example, a service for watching the behavior of school children or the behavior of residents is desired.

  As a solution to the above-mentioned problems and demands, the present invention provides a disaster prevention radio system capable of responding to various requests by expanding the functions possessed by the existing disaster prevention radio system with as little equipment investment as possible. It is intended to do.

  The present invention provides a disaster prevention radio system that performs first communication via a first communication path from a master station to a loudspeaker station or a door-to-door receiver, and a door-to-door receiver or loudspeaker station as a second communication path. A specific low-power radio repeater having a gateway function is provided to perform second communication with the master station.

 In the present invention, by providing a specific low-power wireless repeater having a gateway function in a loudspeaker station or a door-to-door receiver of the disaster prevention radio system, information can be protocol-converted and transmitted from the repeater to the master station, An effect of realizing two-way communication between the master station and the loudspeaker slave station or the individual receiver at a small size and at low cost can be obtained.

It is a block diagram which shows the structure of the disaster prevention radio | wireless system which concerns on Embodiment 1 of this invention. It is a flowchart which performs selection of the information transmission path of the disaster prevention radio | wireless system which concerns on Embodiment 1 of this invention. It is a figure which shows the data table for making small the data amount transmitted in the specific low power radio | wireless of the disaster prevention radio | wireless system of this invention. It is a flowchart in the case of using the disaster prevention radio system which concerns on Embodiment 1 of this invention for local services. It is a figure which shows the test | inspection system which confirms operation | movement of the loudspeaker slave station and the door-to-door receiver which concern on Embodiment 2 of this invention. It is a figure which shows the structure of the service which watches over the specific individual which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals denote the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 shows a configuration of a disaster prevention radio system according to the first embodiment.
As shown in FIG. 1, Embodiment 1 of the present invention is a system in which a conventional facility 100 using a conventional disaster prevention radio system and an additional facility 200 to be newly added are combined.
The conventional facility 100 includes a master station 1, a relay station 2, a loudspeaker slave station 3, and a door-to-door receiver 4, and transmits information through a first communication path 5.

  In the conventional equipment 100, the master station 1 is provided as a source of information in a place that functions as a countermeasure headquarters in the event of a disaster or the like, and from the master station 1 to the relay station 2, the loudspeaker slave station 3, and the door to door Information is transmitted to the receiver 4. The relay station 2 is used when sending information over a long distance, and is provided as necessary. The loudspeaker slave station 3 is used for streaming the voice information received from the master station 1 by a loudspeaker. The door-to-door receiver 4 is installed for each door (for each household). A master console 1 is provided in the master station 1, and the console 6 is used for inputting information transmitted from the master station 1.

  In contrast to this conventional disaster prevention radio system, in the present invention, as the additional equipment 200, the first repeater 7 is connected to the master station 1, the second repeater 8 is connected to the repeater station 2, and the third repeater is connected to the loudspeaker slave station 3. The fourth repeater 10 is provided in the device 9 and the individual receiver 4, and is configured to transmit information through the second communication path 11. The first repeater 7, the second repeater 8, the third repeater 9, and the fourth repeater 10 are repeaters each having a gateway function. It is a repeater and has a function that does not cause interference that hinders the operation of other radio stations. In particular, a spread spectrum modulation method is employed in order to perform long-distance wireless transmission while saving power in accordance with the communication environment of a power-saving wide area network (Low-Power Wide-Area Networks). By adopting a communication system based on this spread spectrum modulation system, the data transmission rate is low, but long-distance transmission is possible, and it is possible to obtain an effect that it is not easily affected by noise and other communications. Further, the additional equipment 200 is configured to receive data from the external wireless communication terminal 12.

For example, the wireless communication terminal 12 transmits a measurement value of a transmitter that is attached to a meter such as water or electricity / gas and transmits meter reading data, or a sensor that monitors a field or river (temperature, humidity, water level, water quality). This includes a transmitter that performs personal information, a mobile phone terminal that is held by an individual, and a terminal that transmits information about the owner's location and emergency information to schoolchildren and deaf persons. When the wireless communication terminal 12 is a transmitter that transmits meter reading data or a transmitter that transmits sensor measurement values, the type of information to be collected and the content of information to be transmitted (for example, a predetermined value or more) Signal in the case of being less than a predetermined value), the communication amount of data to be transmitted is reduced. Further, if the wireless communication terminal 5 is a mobile phone terminal owned by an individual, it is voice information or keyed-in information. Thus, it is specially configured to allocate the fastest, high quality communication.
A transmitter 13 is added to the door-to-door receiver 4 as necessary. The transmitter 13 provides communication means based on Bluetooth (registered trademark) to a mobile phone terminal that does not have specific low power. When the transmitter 13 is provided, it is possible to make contact with information on disaster prevention or administrative services as a hotline, or to measure the position of the terminal with high accuracy.

  As shown in FIG. 1, when functioning as a disaster prevention radio system, information related to a disaster is transmitted from the master station 1 to the relay station 2, the loudspeaker station 3, and the individual receiver 4 through the first communication path 5. Voice information is provided to residents. When the loudspeaker slave station 3 is provided with a transmitter function, the information received by the loudspeaker slave station 3 is broadcast by the speaker and simultaneously with the individual receiver 4 by the first communication path 5. Can be configured to convey information.

  When the service is provided to the residents in normal times, the first repeater 7 is sent from the individual receiver 4 or the transmitter 13 or the wireless communication terminal 12 having the function of the power saving wide area network (LPWAN) of the specific low power radio. By collecting and analyzing various data in the master station 1 via the second repeater 8 or the third repeater 9, the school attendant tracking service, the deaf person monitoring service, the field and river monitoring It is configured to provide services and environmental monitoring services.

  Note that the second communication path 11 is not only used as a data collection communication path as a service to the above-mentioned residents, but also assuming that a failure occurs in the first communication path 5, The communication channel 11 can be used as a complementary communication channel for the disaster prevention radio system.

  Whether or not the entire disaster prevention radio system functions normally by receiving replies from the first repeater 7, the second repeater 8, the third repeater 9, and the fourth repeater 10. Can be grasped. That is, when the master station 1, the relay station 2, the loudspeaker slave station 3, and the door-to-door receiver 4 are operating normally, the console 6 can receive response signals transmitted from the respective repeaters. it can. And when there is a problem (when the response signal cannot be received because it is not operating normally), the function of the disaster prevention radio system is switched appropriately from the first communication path 5 to the second communication path 11. Can be fulfilled. If there is a system failure in one of the communication paths, the other communication path can be used as an alternative communication path during the repair period. Further, when there is a relay station 2, a loudspeaker slave station 3 or a door-to-door receiver 4 that does not respond, it can be determined that repair is necessary and can be dealt with.

Even during a disaster, the master station 1, the relay station 2, the loudspeaker station 3, the door-to-door receiver 4 of the disaster prevention wireless system, and the first to fourth repeaters 7, 8, 9, 10 provided in the respective systems are provided. When communication is not possible due to a disaster or failure, the usable line (communication path) is limited, but it is necessary to select a communication path that functions normally and maintain the function of the disaster prevention radio system. For this purpose, the master station 1 is operated as shown in FIG.
FIG. 2 is a flowchart showing how to set a communication channel when disaster prevention information is notified.

  As shown in FIG. 2, when a disaster occurs and notification of information is started (S000) and disaster prevention information is transmitted to the door-to-door receiver 4, first, the first communication path of the disaster prevention radio system with a sufficient amount of information transmission 5 is prioritized and whether or not the first communication path 5 between the master station 1 and the individual receiver 4 can be used is confirmed (S100). If the first communication path 5 is usable, the first communication path is selected (S101), and information is notified (S102). If the first communication path 5 cannot be used, the second communication path 11 of the specific low-power radio is selected (S103), and the first relay 7 and the fourth repeater 10 are passed (S104). Information is notified (S105). In parallel with the confirmation of the communication path between the master station 1 and the individual receiver 4, confirmation is made as to whether communication is possible on the communication path between the master station 1 and the loudspeaker slave station 3. That is, whether or not the first communication path 5 can be used between the master station 1 and the loudspeaker slave station 3 is confirmed (S200), and if the first communication path 5 is usable, the first communication path is selected. (S201), and information is notified (S202). When the first communication path 5 cannot be used, the second communication path 11 of the specific low power radio is selected (S203), and the first relay 7 and the third repeater 9 are passed (S204). Information is notified (S205). Note that the relay station 2 is used as necessary.

  In the transmission of disaster information, there is an unpredictable state, so it is necessary to prevent it from being received even if it is transmitted. For this reason, both communications can be performed simultaneously. As a result, the transmission of information can be made more reliable. Further, in the second relay 8 of the specific low power radio provided in the loudspeaker slave station 3, when communication from the master station 1 arrives, an incoming signal is transmitted to the master station 1, It can be made possible to confirm that information has arrived reliably. The role of the loudspeaker slave station 3 is to send audio information through the speaker with the information received from the master station 1, so that it not only confirms that the information has arrived reliably, but also sends audio information. You can also make sure that you have played a role.

  In addition, when two-way communication of information is performed, there is a problem that the amount of data is large and the transmission speed is slow, but for this, information by disaster prevention radio is surely transmitted even if the amount of information is large. However, in the specific low power radio, as shown in FIG. 3, by preparing a table in which codes are assigned to the requirements to be transmitted, transmission by codes with a small amount of data is performed. The loudspeaker slave station 3 and the individual receiver 4 can reproduce and broadcast a series of audio information based on the codes received from the data table.

In specific low-power radio communications, it is preferable to reduce the amount of data because the transmission rate is low. For this reason, a data table for codes and audio data is set and encoded on the transmission side using this data table An encoding / decoding device that has an encoding function for performing decoding and a decoding function for performing decoding on the reception side is added to the reception side (speaker station or individual receiver), and the signal based on the code is converted into a series of audio information. Can be converted.
In FIG. 1, the second communication path 11 from the master station 1 to the loudspeaker slave station 3 and the door-to-door receiver 4 is not shown in the figure, but is omitted from the drawing and is similar to the first communication path 5. The second communication path 11 is formed.

  Although Embodiment 1 of the present invention has been described so that the communication path is confirmed when disaster prevention information is flown, a repeater having a specific low-power wireless gateway function is implemented as in the configuration shown in FIG. As a result, the normality of the device can be transmitted every predetermined period or after receiving communication from the master station 1 and fulfilling a given role, so that the system can be easily maintained and managed. be able to.

  As a function to be added to the disaster prevention radio system, it collects information notified from the sensor-equipped terminal equipped with the receiver 4 or the specified low power radio (LPWAN), and the monitoring service (temperature, humidity, water level, Social infrastructure monitoring services (vibrations including water, changes in water quality), environmental monitoring services (services informing changes in rainfall, water level, atmospheric pressure, wind direction, wind speed), air pollutants monitoring services, bridges and tunnels , Noise, hammering sound, ambient temperature change notification service), FA equipment, pump equipment, robot monitoring service (vibration, noise, ambient temperature, emergency button change notification service).

  This informs the measured value at every predetermined time, and communicates the caution and warning information from the measured value. In this configuration, as shown in FIG. 4, in the configuration shown in FIG. 1, data to be collected from the wireless communication terminal 5 is set in advance on the console 11 (S301), and a loudspeaker is set every predetermined time (S302). The station 3 is notified and data transmission is instructed (S303), the data is received by the specific low-power radio (S304), the received data is analyzed to generate necessary information (S305), and the loudspeaker station 3 (S306) is performed to provide necessary information. Note that data collection in this case is performed by the second communication path 11, and information can be provided by using the first communication path 5.

Examples of data collected from the wireless communication terminal 5 include GPS location information, temperature, humidity, water level such as rivers and ponds, moisture, water quality, rainfall, atmospheric components, wind direction, wind speed, ground deformation, and other emergency signals. Is set.
This data collection can be instructed not only to the loudspeaker slave station 3 but also to the individual receiver 4, the master station 1, and the relay station 2 to transmit predetermined data, By configuring as described above, a wide range of information can be collected.
Note that data transmission is instructed every elapse of a predetermined time (S302), but it is possible to instruct data transmission by transmitting an interrupt signal at any time as required. In this way, by transmitting data according to the interrupt signal, it becomes possible to collect information on an ad hoc basis.

  In addition to determining whether a predetermined time has elapsed or whether there is an interrupt signal, this process (S302) is performed to determine whether there is a call from any of the loudspeaker slave unit 3, the individual receiver 4, the master station 1, or the relay station 2. Set as a judgment (S307), if a signal from any of the loudspeaker slave unit 3, the door-to-door receiver 4, the master station 1 and the relay station 2 is received, the received data is analyzed (S308) and necessary It is possible to perform various operations (S309).

Embodiment 2. FIG.
As Embodiment 1, the overall configuration of the disaster prevention wireless system has been described. In the second embodiment, an inspection system for confirming that the loudspeaker slave station 3 and the door-to-door receiver 4 operate normally for communication from the master station 1 will be described. It should be noted that whether or not the loudspeaker slave station 3 and the individual receiver 4 are operating normally is not confirmed in an emergency, but it is necessary to confirm that they are operating normally.
A configuration for performing this confirmation is shown in FIG. The inspection system shown in FIG. 5 is applicable to both the loudspeaker slave station 3 and the door-to-door receiver 4, and is built in the repeaters 7, 8, 9, 10 that are particularly added in the additional equipment 200. ing.
The inspection system includes functions of a timer 51, a memory 52, a control device 53, a calculation device 54, and a transmitter 55. The memory 52 has a test program for confirming the operation.

  The timer 51 of this inspection system is turned on after a predetermined period, and the test program in the memory 52 is called and the test program is started. As the test program is started up, the control device 53 starts control, digitizes and outputs the status of each part of the device. The numerical values of the status of each part of the device are as shown in the figure. The battery voltage of the device, the presence or absence of opening / closing of the device, the presence or absence of various abnormal states, confirmation of receipt, confirmation of transmission / reception, health check Normal operation of emergency button, power supply equipment status, blowing history, etc. The numerical value of the state of each part of the device is arithmetically processed in the arithmetic unit 54, a table representing the state of each part of the device is created, the encoding process is performed, the data is compressed, and transmitted from the transmitter 55 by the specific low power radio. To do. Further, the transmission history is left in the memory 52 so that the change in state can be grasped. The timer 51, the memory 52, the control device 53, the arithmetic device 54, and the transmitter 55 are connected by a bus 56.

  The start of the test program for checking the operation according to the second embodiment is instructed to transmit data by transmitting an interrupt signal at any time as required instead of the operation of the timer 51 for a predetermined period. be able to. In this way, it is possible to arbitrarily confirm whether or not the operation is normal according to the interrupt signal.

  In this description, the case where the inspection is periodically performed has been described, but the test program of the memory is started by the reception of the signal from the master station 1 by the receiver 57, and the control of the control device 53 is controlled. The calculation result of the calculation device 54 can be started and a response signal can be returned from the transmitter 55 to the master station 1 using the second communication path 11. In this case, the operation of the disaster prevention radio system can be confirmed when the master station 1 is activated, and such a system is necessary particularly when communicating disaster prevention information immediately after a disaster occurs.

Embodiment 3 FIG.
A specific configuration will be described as a third embodiment in the case where a service for watching a specific individual is performed using the disaster prevention wireless system according to the first embodiment.
This watching service is a service that provides location information of individuals, especially for school children, individuals who may be jealous, and other individuals who need management.

  As shown in FIG. 6, the loudspeaker slave stations 3 of the disaster prevention radio system are arranged in a distributed manner, and areas in charge by the respective loudspeaker slave stations 3 are set. A third relay 9 of specific low power radio is added to the loudspeaker slave station 3 and the individuals A and B are identified by the third repeater 9 to obtain position information of the individuals A and B. . The location information of the individuals A and B is a terminal device having a transmission function such as a mobile phone held by the individuals A and B, and is a third device in which specific low-power radio waves from the terminal device are added to the loudspeaker slave station 3. The repeater 9 detects the loudspeaker station 3 to which the mobile terminal device is located. In general, the loudspeaker slave station 3 is provided at every distance (radius of about 500 m) where the voice reaches, so that it is possible to detect a specific low-power radio wave.

Therefore, the individuals A and B that need to be managed have a terminal device such as a mobile phone or a transmitter, so that a specific low-power radio wave from the terminal device is provided in the loudspeaker slave station 3. Therefore, if a loudspeaker station 3 close to the position where the terminal device originally exists is registered in advance, a different loudspeaker station from the assigned area 30 of the registered loudspeaker station 3 can be obtained. When entering the area 3, attention can be urged. In the state shown in FIG. 6, it is indicated that the person B is in an area different from the area where the person B should originally exist.
In the case of school children, since the school route is almost fixed, it is possible to detect a case where the student is significantly away from the school route and call attention. Both of these services are performed using the specific low-power radio detection function of the third repeater 9 added to the loudspeaker slave station 3.

  In the present invention, any constituent elements of the embodiments can be appropriately combined, or can be appropriately changed or omitted within the scope of the invention.

1 master station, 2 relay station, 3 loudspeaker station, 4 separate receiver, 5 first communication path,
6 console, 7 first repeater, 8 second repeater, 9 third repeater,
10 fourth repeater, 11 second communication path, 12 wireless communication terminal, 13 transmitter,
30 area, 51 timer, 52 memory, 53 controller,
54 arithmetic unit, 55 transmitter, 56 bus, 57 receiver

Claims (7)

  In the disaster prevention radio system that performs the first communication through the first communication path from the master station to the loudspeaker slave station or the individual receiver, the master station, the separate receiver, or the loudspeaker station has a gateway function. A disaster prevention radio system characterized in that a specific low-power radio repeater is provided and constitutes a second communication path for performing second communication with the master station.   The disaster prevention wireless system according to claim 1, wherein the second communication is specific low power wireless communication.   2. The disaster prevention radio system according to claim 1, wherein the repeater includes a memory that holds a test program for operation confirmation, and a timer that activates the test program after a predetermined period.   The disaster prevention radio system according to claim 1, wherein the repeater has a memory that holds a test program for operation check and a function of starting the test program every time an interrupt occurs.   2. The disaster prevention radio system according to claim 1, wherein the individual receiver transmits a response signal through the second communication path in response to activation from the master station.   The disaster prevention wireless system according to claim 1, wherein the repeater receives data from an external wireless communication terminal. An area in charge is determined for each of the plurality of loudspeaker stations, and a specific low power radio wave from a mobile terminal device is detected by the repeater provided in the loudspeaker station, and the terminal device performs the loudspeaker 2. The disaster prevention radio system according to claim 1, wherein it is possible to grasp which loudspeaker station of the stations is near.

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