JP2013182429A - System and method for detecting disaster victim - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disaster victim detection system which is intended for an indefinite number of people, enables a widespread search saving time and trouble, not via a public network nor a base station, and automatically performs rescue request when disaster occurs.SOLUTION: In a device 100 for a disaster victim, a disaster determination part 120 monitors change of the number of surrounding APs (access points) and checks whether or not disaster occurs. A rescue request propriety determination part 140 determines whether or not a rescue request signal should be transmitted, on the basis of history information of the device 100 for a disaster victim. A signal transmission part 160 transmits the rescue request signal in which disaster victim information is set, when it is determined that the rescue request signal should be transmitted. In a device 200 for a rescuer, a signal reception part 220 receives the rescue request signal from the device 100 for a disaster victim. An information notification part 240 analyzes the received rescue request signal, obtains and displays the disaster victim information. A rescuer detects existence of the disaster victim on the basis of the displayed disaster victim information.

Description

  The present invention relates to a disaster detection system and method for detecting the presence of a disaster victim.

  As a technique for detecting the presence of a victim, for example, there is a system described in Patent Document 1. This system registers people in the room in advance and identifies who was in each room at the time of the disaster.

  The system described in Patent Document 2 includes a search-side mobile phone and a searched-side mobile phone. The search-side mobile phone responds to the search signal transmitted from the search-side mobile phone, thereby detecting the relative distance between the two mobile phones and grasping how far the target person is.

  The system described in Patent Document 3 automatically outputs a rescue signal from a cellular phone of a disaster victim when a time set by the timer function of the cellular phone has elapsed or when a command for transmitting a rescue signal is received from a base station. The location of the victims is specified by sending them automatically.

  The system described in Patent Document 4 acquires GPS information of a mobile phone possessed by a disaster victim via a public network and navigates a rescuer to the victim based on the GPS information.

  The device described in Patent Document 5 detects the sound emitted by the victim using a plurality of microphones arranged on the device, and specifies the position of the victim.

  The mobile phone described in Patent Document 6 sends a signal notifying the position of the disaster victim to the rescuer by inputting a predetermined command, thereby facilitating the rescue operation.

JP 2001-283348 A Japanese Patent Laid-Open No. 2004-297201 JP 2002-152061 A JP 2009-157485 A JP 2010-25802 A JP-A-8-289369

  However, as in Patent Documents 1 and 2, when information on a person to be detected is registered in the system in advance, a person whose information is not registered is excluded from the system. Further, as in Patent Documents 3 and 4, when transmitting / receiving information for detecting a victim via a public line network or a base station, the system cannot be used if the line becomes unusable due to line congestion, power failure, or device failure. Cannot detect victims. Moreover, when using an apparatus like patent document 5, since the range which can collect sound is not so wide, when performing a wide range investigation, it takes time. In addition, there is a possibility that a rescue request cannot be made when an operation of a disaster victim is required as in Patent Document 6, or when the disaster victim is distracted.

  In view of the above problems, the object of the present invention is to enable an unspecified number of persons to conduct a wide-ranging investigation that does not involve a public network or base station and does not require time, and automatically requests rescue in the event of a disaster. An object of the present invention is to provide a disaster detection system and a disaster detection method.

According to the present invention,
Comprising at least one disaster victim device capable of wireless communication with an AP (access point), and at least one rescuer device capable of wireless communication with the disaster victim device;
The victim equipment is
Disaster judging means for judging the presence or absence of a disaster based on the detected change in the number of APs;
When the disaster judgment means detects a disaster, from the history information of the disaster victim device before and after the occurrence of the disaster, a rescue request availability judgment means for judging whether or not to send a rescue signal required;
In the rescue request availability determination means, when it is determined that a rescue signal is required, signal transmission means for transmitting a rescue signal required,
The rescuer device is:
Signal receiving means for receiving the rescue signal required;
Having an information notification means for analyzing the rescue signal and obtaining victim information;
A victim detection system is provided.

According to the present invention,
Using at least one disaster victim device capable of wireless communication with the AP, and at least one rescuer device capable of wireless communication with the disaster victim device,
In the equipment for the victims,
Based on the detected change in the number of APs, it is determined whether a disaster has occurred,
As a result of the determination, when a disaster is detected, it is determined whether or not a rescue signal is required from the history information of the disaster victim device before and after the occurrence of the disaster,
As a result of the determination, if it is determined that a rescue signal is required, a rescue signal is required,
The rescuer equipment,
Receiving the rescue signal,
Analyzing the rescue signal required to obtain victim information,
A victim detection method is provided.

  According to the present invention, it is possible to detect a large number of unspecified persons, enable a wide range of trouble-free investigation without going through a public network and a base station, and automatically make a rescue request when a disaster occurs. System and victim detection method can be provided.

It is a block diagram which shows the structure of the victim detection system which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the flow of a process of the apparatus for disaster victims concerning the 1st Embodiment of this invention. It is a flowchart which shows the flow of a process of the apparatus for rescuers which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the victim detection system which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the flow of a process of the apparatus for disaster victims concerning the 2nd Embodiment of this invention. It is a flowchart which shows the flow of a historical information acquisition process. It is a flowchart which shows the flow of a rescue request process. It is a flowchart which shows the flow of a process of the apparatus for rescuers which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the flow of a process of the apparatus for disaster victims concerning the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a disaster detection system according to the first embodiment of the present invention. The disaster detection system of this embodiment includes a disaster victim device 100 and a rescuer device 200. The disaster victim device 100 detects whether or not a disaster has occurred, determines whether or not to send a rescue signal based on the status of the user of the disaster victim device 100 (hereinafter referred to as a monitored person), and wireless communication It has a function of transmitting a rescue signal required. The rescuer device 200 has a function of receiving a rescue request signal via wireless communication and a notification function of victim information based on the rescue signal required.

  The disaster victim device 100 includes a disaster determination unit 120, a rescue request availability determination unit 140, and a signal transmission unit 160. The disaster determination unit 120 detects the number of beacon packets transmitted from surrounding APs (access points), and acquires the number of APs present in the surroundings (hereinafter referred to as AP detection number). Then, the occurrence of a disaster is detected by appropriately monitoring the change in the number of detected APs. The rescue request availability determination unit 140 detects the status of the monitored person based on the operation history of the disaster victim device 100 (hereinafter referred to as history information) and determines whether or not a rescue signal required should be transmitted. The signal transmission unit 160 transmits a rescue request signal in which information on the victim is set.

  The rescuer device 200 includes a signal receiving unit 220 and an information notification unit 240. The signal receiving unit 220 receives a rescue request signal transmitted from the disaster victim device 100. The information notification unit 240 analyzes the received rescue request signal, acquires the victim information, and notifies the rescuer.

  Note that each component of the disaster victim device 100 and the rescuer device 200 shown in each figure is not a hardware unit configuration, but a functional unit block. The CPU, memory, and memory of any computer It is realized by an arbitrary combination of hardware and software, centering on a program for realizing the components shown in FIG. 1 loaded on the storage medium, a storage medium such as a hard disk for storing the program, and a network connection interface. There are various modifications of the implementation method and apparatus.

  FIG. 2 is a flowchart showing a process flow of the disaster victim device 100 according to the first embodiment of the present invention. The disaster determination unit 120 acquires history information of the disaster victim device 100 before the occurrence of the disaster (S202). In addition, the disaster determination unit 120 acquires the AP detection number based on the number of beacon packets transmitted from surrounding APs (S204). Then, the disaster determination unit 120 compares the acquired AP detection number with the normal AP detection number. Note that the number of AP detections in normal times is, for example, the number of AP detections in a certain time range before acquiring the latest AP detection number. Then, the latest AP detection number is compared with the normal AP detection number, and when the degree of decrease in the AP detection number is equal to or greater than the reference value, the disaster determination unit 120 determines that a disaster has occurred (YES in S206). On the other hand, when the degree of decrease in the AP detection number is less than the reference value, the disaster determination unit 120 determines that no disaster has occurred and continues to acquire history information and the AP detection number (NO in S206).

  In S206, when the disaster determination unit 120 determines that a disaster has occurred, the rescue request availability determination unit 140 acquires history information of the disaster victim device 100 after the disaster has occurred (S208). Then, the rescue request availability determination unit 140 compares the history information before the occurrence of the disaster acquired in S202 and the history information after the occurrence of the disaster acquired in S208, detects the status of the monitored person, and transmits a rescue signal required. Determine whether or not to do so. For example, when the person 100 to be monitored is in an inoperable state due to loss of consciousness or the like, the apparatus 100 for the victim is not operated until the person to be monitored becomes operable. Therefore, when the operation interval of the disaster victim device 100 calculated from the history information before and after the occurrence of the disaster is equal to or longer than a certain time, the rescue request availability determination unit 140 is in a state where the monitored person cannot request rescue himself, and a rescue signal is required. Is determined to be transmitted. On the other hand, if the operation interval of the disaster victim device 100 is less than a certain time, the rescue request availability determination unit 140 determines that the monitored person can request rescue himself and does not need to transmit a rescue signal. . When the rescue request availability determination unit 140 determines that a rescue request signal should be transmitted, the rescue request availability determination unit 140 transmits an instruction to the signal transmission unit 160 to transmit a rescue signal required (YES in S210). . On the other hand, if it is determined that it is not necessary to transmit a rescue signal required, the rescue request availability determination unit 140 continues to acquire history information of the disaster victim device 100 and monitors the status of the monitored person (NO in S210). .

  When the signal transmission unit 160 receives an instruction to transmit a rescue request signal, the signal transmission unit 160 transmits a rescue signal that sets disaster victim information (S212). Here, it is preferable that the disaster victim information set in the rescue required signal includes information that can identify the disaster victim, such as the name and address of a person who uses the disaster victim device 100.

  FIG. 3 is a flowchart showing a process flow of the rescuer apparatus 200 according to the first embodiment of the present invention. The signal receiving unit 220 directly receives the rescue request signal transmitted by the disaster victim device 100 by wireless communication (S302), and transmits the received rescue request signal to the information notification unit 240. The information notification unit 240 analyzes the information set in the received rescue request signal (S304). Then, the victim information is acquired from the analysis result of the rescue signal required and notified by displaying it on the display of the rescuer device 200 (S306).

  The rescuer can check the victim information on the rescuer device 200 and detect the presence of the victim. Hereinafter, the operational effects will be described together.

  By adopting a configuration in which the rescuer device 200 receives a signal transmitted by the disaster victim device 100, preparations such as setting disaster victim information in advance become unnecessary. In addition, since it is not necessary to specify the victim in advance, any person who possesses a device capable of wireless communication when a disaster occurs can be rescued by this system. Since the disaster victim device 100 has a function of determining whether or not a rescue request signal should be transmitted, a rescue request can be made even when the disaster victim cannot operate the disaster victim device 100. In other words, according to the present invention, an unspecified number of persons are targeted, and no investigation is required, and it is possible to conduct an investigation within a range where the disaster victim device 100 and the rescuer device 200 can communicate wirelessly, and when a disaster occurs. The rescue request can be automatically made.

(Second Embodiment)
The second embodiment according to the present invention is the first except that the history information used when determining whether or not to send a rescue signal is necessary includes the GPS information of the disaster victim device 100. It is the structure similar to the disaster detection system which concerns on embodiment.

  FIG. 4 is a block diagram illustrating a configuration of a disaster detection system according to the second embodiment of the present invention. In the present embodiment, the disaster determination unit 120 includes a communication control unit 122, an AP detection number storage unit 124, and a disaster detection unit 126.

  The communication control unit 122 acquires the AP detection number based on the number of beacon packets transmitted from surrounding APs. The AP detection number storage unit 124 stores the AP detection number acquired by the communication control unit 122. The disaster detection unit 126 detects the occurrence of a disaster by reading the AP detection number stored in the AP detection number storage unit 124 and monitoring the change in the AP detection number.

  The rescue request availability determination unit 140 includes a terminal operation detection unit 142, a GPS (Global Positioning System) reception unit 144, a history information storage unit 146, and a rescue request unit 148. The terminal operation detection unit 142 acquires, as the terminal final operation time, the time when the monitored person performs the last operation when any operation is performed on the disaster victim device 100. The GPS receiving unit 144 acquires GPS information of the disaster victim device 100. The history information storage unit 146 stores the terminal last operation time acquired by the terminal operation detection unit 142 and the GPS information acquired by the GPS reception unit 144. The rescue request unit 148 reads the GPS information stored in the history information storage unit 146 and monitors changes in the GPS information. In addition, the rescue request unit 148 reads the terminal final operation time stored in the history information storage unit 146 and compares the current time with the terminal operation interval to calculate the terminal operation interval. If the person being monitored cannot request rescue by himself / herself when the disaster occurs, the disaster victim's device 100 is not operated for a long time, and the GPS information does not change. In addition, it is conceivable that the GPS information cannot be acquired because the monitored person enters under the rubble. Therefore, the rescue request unit 148 determines whether or not a rescue signal required is to be transmitted based on the presence / absence of GPS information change, availability, and the calculated terminal operation interval.

  In the present embodiment, the information notification unit 240 includes a signal analysis unit 242, a disaster victim information storage unit 244, and a disaster victim information display unit 246.

  The signal analyzer 242 determines the type of signal received by the signal receiver 220. If the determination result is a rescue signal required, the signal analysis unit 242 analyzes the rescue signal and acquires the victim information. The disaster victim information storage unit 244 stores the disaster victim information acquired by the signal analysis unit 242. The disaster victim information display unit 246 reads the disaster victim information stored in the disaster victim information storage unit 244 and displays it on the display of the rescuer device 200, for example, to notify the rescuer of the disaster victim information. .

  FIG. 5 is a flowchart showing a process flow of the disaster victim device 100 according to the second embodiment of the present invention. The terminal operation detection unit 142 performs history information acquisition processing, and acquires history information of the victim device 100 before the occurrence of the disaster (S202). The history information acquisition process will be described below.

  FIG. 6 is a flowchart showing details of the history information acquisition process. When there is any operation on the victim device 100, the terminal operation detection unit 142 acquires the time when the victim device 100 was operated as the terminal last operation time, and stores it in the history information storage unit 146 (S602). . Then, the GPS receiving unit 144 acquires the GPS information of the disaster victim device 100 and stores it in the history information storage unit 146 (S604).

  Returning to FIG. 5, the continuation of the processing flow of the disaster victim device 100 according to the second embodiment of the present invention will be described. The communication control unit 122 stores the acquired AP detection number in the AP detection number storage unit 124 (S204). Then, the disaster detection unit 126 reads the AP detection number stored in the AP detection number storage unit 124, and determines whether a disaster has occurred (S206). These processes are the same as those in the first embodiment. Next, when it is determined in S206 that a disaster has occurred, history information after the occurrence of the disaster is acquired (S208). The history information acquisition process of S208 is the same as S202.

  The rescue request unit 148 compares the history information before the occurrence of the disaster acquired in S202 with the history information after the occurrence of the disaster acquired in S208, detects whether the person being monitored should transmit a rescue signal required Judging. In the present embodiment, the rescue request unit 148 confirms whether or not there is a change in GPS information based on GPS information before and after the disaster and the terminal operation interval based on the terminal final operation time before and after the disaster. As a result of the confirmation, if there is no change in GPS information or GPS information cannot be acquired (YES in S502), and if the operation interval of the terminal is equal to or longer than a certain time (YES in S504), the rescue request unit 148 Since it is impossible to request a rescue by itself and a rescue signal is required, a rescue request is made (S212). On the other hand, when there is a change in the acquired GPS information (NO in S502), or when the operation interval of the terminal is less than a certain time (NO in S504), the rescue request unit 148 can make a rescue request by the monitored person himself / herself. It is determined that there is no need to send a rescue signal. Since the flow of processing after determining whether or not to send a rescue signal is the same as in the first embodiment, a description thereof will be omitted. The rescue request process will be described below.

  FIG. 7 is a flowchart showing the flow of the rescue request process. The signal transmission unit 160 determines whether or not the disaster victim device 100 itself is equipped with an AP function serving as an AP (S702). When the AP function is installed, the signal transmission unit 160 transmits a beacon packet (S704). Since the beacon packet cannot be transmitted when the AP function is not installed, the signal transmission unit 160 transmits a Probe Request packet (S706). When transmitting a beacon packet or a probe request packet, the signal transmission unit 160 sets an SSID (Service Set Identifier) of each packet in an area for setting a SSID (hereinafter referred to as a rescue SSID required) and a disaster victim. Set the information. The transmission of the beacon packet or the probe request packet is repeated until the operation for canceling the rescue request is performed in the disaster victim device 100 (NO in S708). When an operation for canceling the rescue request is performed (YES in S708), the signal transmission unit 160 stops transmitting the packet and ends the rescue request process.

  FIG. 8 is a flowchart showing a process flow of the rescuer apparatus 200 according to the second embodiment of the present invention. The signal analysis unit 242 determines whether the signal received by the signal reception unit 220 is a beacon packet or a probe request packet. When the packet is a beacon packet or a probe request packet (YES in S802), the signal analysis unit 242 analyzes the SSID in the packet (S804). As a result of the analysis, if the rescue SSID is required for the SSID (YES in S806), the signal analysis unit 242 analyzes the disaster victim information included in the rescue required SSID and stores it in the disaster victim information storage unit 244 (S808). ). Then, the disaster victim information display unit 246 reads the disaster victim information stored in the disaster victim information storage unit 244 and displays it on the display of the rescuer device 200 to notify the rescuer of the disaster victim information (S810). ). The rescuer can check the victim information on the rescuer device 200 and detect the presence of the victim. The disaster information display unit 246 reads a plurality of disaster information stored in the disaster information storage unit 244, so that a plurality of disasters can be detected simultaneously.

  On the other hand, when the signal received by the signal receiving unit 220 is not a beacon packet or a probe request packet (NO in S802), and the received signal is a beacon packet or a probe request packet, the SSID requiring rescue SSID is not set. In the case (NO in S806), the signal analysis unit 242 performs packet reception processing according to IEEE 802.11 (S812). As described above, by branching the processing depending on the type of packet and the set value of the SSID, the rescuer device 200 can distinguish between the rescue request signal and the signal received in normal communication.

  Also according to this embodiment, the same effect as that of the first embodiment can be obtained. Further, in this embodiment, when a disaster occurs, if the monitored person cannot be rescued by himself / herself, such as when the monitored person loses consciousness, the positional information of the monitored person does not change. Have. Since the history information includes GPS information, it can be expected to improve the accuracy of determining whether or not a rescue request signal should be transmitted.

(Third embodiment)
The third embodiment according to the present invention is related to the second embodiment, except that when determining whether or not a disaster has occurred in the disaster victim device 100, the congestion status of the public telephone line network is included in the determination material. The configuration is the same as the victim detection system.

  FIG. 9 is a flowchart showing a process flow of the disaster victim device 100 according to the third embodiment of the present invention. When a large-scale disaster occurs, the public telephone line network is restricted in use, so it is expected that it will be difficult to connect or use. Therefore, by adding the availability of the public line network and the degree of congestion to the conditions for determining whether or not a disaster has occurred, it can be expected to improve the detection accuracy of whether or not a disaster has occurred. For example, when the degree of decrease in the AP detection number is greater than or equal to a reference value in S206, the disaster detection unit 126 attempts communication with the mobile phone base station. As a result of the communication, if it is difficult to connect to the mobile phone base station or cannot be used, the disaster detection unit 126 determines that a disaster has occurred, and performs the process after the occurrence of the disaster as in the second embodiment (YES in S902). On the other hand, when there is a response within a certain time and the mobile phone base station can be used, the disaster detection unit 126 determines that no disaster has occurred, and continues to detect whether a disaster has occurred (NO in S902). ).

  Since the flow of processing of the rescuer device 200 according to the present embodiment is the same as the flow of processing of the rescuer device 200 according to the second embodiment, description thereof will be omitted.

  Also according to this embodiment, the same effect as the first and second embodiments can be obtained. Further, in this embodiment, it is expected that the detection accuracy of the occurrence of a disaster can be improved by including the congestion status of the public telephone line network in the determination condition of the occurrence of the disaster.

According to the above-described embodiment, the following invention is disclosed.
(Appendix 1)
Comprising at least one disaster victim device capable of wireless communication with an AP (access point), and at least one rescuer device capable of wireless communication with the disaster victim device;
The victim equipment is
Disaster judging means for judging the presence or absence of a disaster based on the detected change in the number of APs;
When the disaster judgment means detects a disaster, from the history information of the disaster victim device before and after the occurrence of the disaster, a rescue request availability judgment means for judging whether or not to send a rescue signal required;
In the rescue request availability determination means, when it is determined that a rescue signal is required, signal transmission means for transmitting a rescue signal required,
The rescuer device is:
Signal receiving means for receiving the rescue signal required;
Having an information notification means for analyzing the rescue signal and obtaining victim information;
Disaster detection system.
(Appendix 2)
In the disaster detection system described in Appendix 1,
The rescue request availability determination means includes:
Storage means for storing the history information;
When a disaster is detected, the history information in normal times and the history information after the occurrence of the disaster are compared, and has a determination means for determining whether or not a rescue signal is required.
Disaster detection system.
(Appendix 3)
In the disaster detection system according to appendix 1 or 2,
The disaster judgment means includes
Means for detecting an AP existing in the vicinity by a beacon packet transmitted from the AP;
Means for detecting the presence or absence of a disaster based on the detected degree of decrease in the number of APs;
Disaster detection system.
(Appendix 4)
In the disaster detection system according to any one of appendices 1 to 3,
The signal transmission means includes
In the beacon packet or the probe request packet, an SSID (Service Set Identifier) is set in an area where the rescue request signal is set and transmitted.
Disaster detection system.
(Appendix 5)
In the disaster detection system according to any one of appendices 1 to 4,
The history information is
The operation interval of the disaster victim device and the GPS location information of the disaster victim device,
Disaster detection system.
(Appendix 6)
In the disaster detection system according to any one of appendices 1 to 5,
The disaster judgment means includes
Further, determining whether or not the public telephone line network can be used and the degree of congestion, and determining whether or not a disaster has occurred when the public telephone line network is unusable and congested.
Disaster detection system.
(Appendix 7)
In the disaster detection system described in Appendix 6,
The disaster judgment means includes
Determining whether or not the public telephone line network can be used and the degree of congestion by analyzing a result of communication with a mobile phone base station;
Disaster detection system.
(Appendix 8)
Using at least one disaster victim device capable of wireless communication with the AP, and at least one rescuer device capable of wireless communication with the disaster victim device,
The victim device is
Based on the detected change in the number of APs, it is determined whether a disaster has occurred,
As a result of the determination, when a disaster is detected, it is determined whether or not a rescue signal is required from the history information of the disaster victim device before and after the occurrence of the disaster,
As a result of the determination, if it is determined that a rescue signal is required, a rescue signal is required,
The rescuer device is
Receiving the rescue signal,
Analyzing the rescue signal required to obtain victim information,
Disaster detection method.
(Appendix 9)
In the disaster detection method described in appendix 8,
The victim device is
Storing the history information;
When a disaster is detected, the history information in a normal state and the history information after the disaster has occurred are compared, and it is determined whether or not the rescue signal should be transmitted.
Disaster detection method.
(Appendix 10)
In the disaster detection method according to appendix 8 or 9,
The victim device is
The beacon packet transmitted from the AP detects the AP existing in the surrounding area,
Determining the presence or absence of the disaster based on the detected degree of decrease in the number of APs;
Disaster detection method.
(Appendix 11)
In the disaster detection method according to any one of appendices 8 to 10,
The victim device is
In the beacon packet or the probe request packet, an SSID (Service Set Identifier) is set in an area where the rescue request signal is set and transmitted.
Disaster detection method.
(Appendix 12)
In the disaster detection method according to any one of appendices 8 to 11,
The history information is
The operation interval of the disaster victim device and the GPS location information of the disaster victim device,
Disaster detection method.
(Appendix 13)
In the disaster detection method according to any one of appendices 8 to 12,
The victim device is
Further, determining whether or not the public telephone line network can be used and the degree of congestion, and determining whether or not a disaster has occurred when the public telephone line network is unusable and congested.
Disaster detection method.
(Appendix 14)
In the disaster detection system described in appendix 13,
The victim device is
Determining whether or not the public telephone line network can be used and the degree of congestion by analyzing a result of communication with a mobile phone base station;
Disaster detection method.

  As mentioned above, although embodiment of this invention was described with reference to drawings, these are the illustrations of this invention, Various structures other than the above are also employable.

DESCRIPTION OF SYMBOLS 100 Disaster victim apparatus 120 Disaster judgment part 122 Communication control part 124 AP detection number memory | storage part 126 Disaster detection part 140 Rescue request | requirement decision part 142 Terminal operation detection part 144 GPS receiving part 146 History information storage part 148 Rescue request part 160 Signal transmission Part 200 Rescue equipment 220 Signal receiving part 240 Information notifying part 242 Signal analyzing part 244 Disaster victim information storage part 246 Disaster victim information display part

Claims (8)

Comprising at least one disaster victim device capable of wireless communication with an AP (access point), and at least one rescuer device capable of wireless communication with the disaster victim device;
The victim equipment is
Disaster judging means for judging the presence or absence of a disaster based on the detected change in the number of APs;
When the disaster judgment means detects a disaster, from the history information of the disaster victim device before and after the occurrence of the disaster, a rescue request availability judgment means for judging whether or not to send a rescue signal required;
In the rescue request availability determination means, when it is determined that a rescue signal is required, signal transmission means for transmitting a rescue signal required,
The rescuer device is:
Signal receiving means for receiving the rescue signal required;
Having an information notification means for analyzing the rescue signal and obtaining victim information;
Disaster detection system. In the disaster detection system according to claim 1,
The rescue request availability determination means includes:
Storage means for storing the history information;
When a disaster is detected, the history information in normal times and the history information after the occurrence of the disaster are compared, and has a determination means for determining whether or not a rescue signal is required.
Disaster detection system. In the disaster detection system according to claim 1 or 2,
The disaster judgment means includes
Means for detecting an AP existing in the vicinity by a beacon packet transmitted from the AP;
Means for detecting the presence or absence of a disaster based on the detected degree of decrease in the number of APs;
Disaster detection system. In the disaster detection system according to any one of claims 1 to 3,
The signal transmission means includes
In the beacon packet or the probe request packet, an SSID (Service Set Identifier) is set in an area where the rescue request signal is set and transmitted.
Disaster detection system. In the disaster detection system according to any one of claims 1 to 4,
The history information is
The operation interval of the disaster victim device and the GPS location information of the disaster victim device,
Disaster detection system. In the disaster detection system according to any one of claims 1 to 5,
The disaster judgment means includes
Further, determining whether or not the public telephone line network can be used and the degree of congestion, and determining whether or not a disaster has occurred when the public telephone line network is unusable and congested.
Disaster detection system. In the disaster detection system according to claim 6,
The disaster judgment means includes
Determining whether or not the public telephone line network can be used and the degree of congestion by analyzing a result of communication with a mobile phone base station;
Disaster detection system. Using at least one disaster victim device capable of wireless communication with the AP, and at least one rescuer device capable of wireless communication with the disaster victim device,
In the equipment for the victims,
Based on the detected change in the number of APs, it is determined whether a disaster has occurred,
As a result of the determination, when a disaster is detected, it is determined whether or not a rescue signal is required from the history information of the disaster victim device before and after the occurrence of the disaster,
As a result of the determination, if it is determined that a rescue signal is required, a rescue signal is required,
The rescuer equipment,
Receiving the rescue signal,
Analyzing the rescue signal required to obtain victim information,
Disaster detection method.

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