JP2017156221A - Disaster victim sensing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disaster victim sensing system that can search for a disaster victim and remove sediment as far as a place close to where the victim is buried by using a civil engineering machine.SOLUTION: A disaster victim sensing system (10) comprises: a long wave transmission unit that is attached to a disaster victim buried under sediment and transmits long waves or super long waves with a plurality of different wave lengths; a receiver for receiving the long waves or super long waves transmitted by the long wave transmission unit; and a storage unit for storing relation between the plurality of different wave lengths and depth of the sediment. The system further comprises: a determination unit for determining the depth of the disaster victim on the basis of the relation between the wave lengths and the depth by receiving the long waves or super long waves by using the receiver; and a notification unit for giving notice of the depth of the disaster victim determined by the determination unit.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a technique for searching for a victim under a collapsed building, accumulated sediment, debris, etc. (hereinafter referred to as “sediment”), and in particular, a deposit for a worker at a construction site or the like. The present invention relates to a disaster detection system for detecting the presence of disaster victims.

  In a building construction site, a tunnel construction site, or a quarry mining site, an operator may be buried with deposits during work. The victims (workers) who have been buried with sediment do not know where they are buried. Therefore, a disaster victim search apparatus such as that disclosed in Patent Document 1 has been proposed.

JP 2000-275352 A

  However, even if the location where the victims are buried can be identified to some extent, it takes time to rescue them manually using a scoop. In order to rescue the victim as soon as possible, it is desirable to remove the deposit with a civil engineering machine such as a hydraulic excavator.

  It is an object of the present invention to provide a victim detection system that searches for a victim and can remove deposits using a civil engineering machine close to the place where the victim is buried.

  A disaster detection system according to a first aspect includes a long wave transmission unit that is attached to a disaster victim buried in a deposit and transmits a long wave or a super long wave of a plurality of different wavelengths, and a long wave or a super long wave transmitted from the long wave transmission unit. A receiver for receiving, and a storage unit for storing a relationship between a plurality of different wavelengths and depths in the sediment. In addition, the system receives a long wave or a super long wave, so that the receiver determines the depth of the victim based on the relationship between the wavelength and the depth, and a notification for notifying the depth of the victim determined by the judgment unit. A section.

The receiver of the victim detection system is attached to the arm of an excavator machine that moves an arm having a bucket to mine sediment.
The notification unit of the victim detection system includes, for example, a display screen for displaying information and a sound generation unit for generating sound.
The disaster detection system includes a digital signage having a display screen, a sound generation unit, a storage unit, and a determination unit. When the determination unit determines the depth of the victim, the display screen displays the depth of the victim, and the sound generation unit utters the depth of the victim. Further, before the determination unit determines the depth of the victim, the display screen displays the status of the work site where the digital signage is arranged.

The disaster detection system includes a pressure sensor that measures the pressure of the deposit, and the long wave transmission unit transmits a long wave or a very long wave when the pressure of the deposit is measured.
The victim is equipped with an environmental sensor that measures the environmental data of the work site and a communication unit that communicates the environmental data measured by the environmental sensor via short-range wireless communication. When the communication unit measures the pressure of the deposit, Stop near field communication.
In addition, the victims are each equipped with a long wave transmission unit in a different part of the body, the long wave transmission unit transmits a different relief signal, and the determination unit is based on the different relief signals, It is judged from which part the long wave or the super long wave comes from.
Furthermore, the determination unit estimates the posture of the victim based on different relief signals.

1A is a perspective view of a digital signage apparatus 100. FIG. (B) is a front view of the worker 130. FIG. (A), (b) is a structure of the mounting apparatuses 141-145. 1 is a schematic configuration diagram of a victim detection system 10 at a construction site. 1 is a block diagram of a victim detection system 10. FIG. 4 is a flowchart of the operation of the victim detection system 10. The worker is buried in the sediment. It is an example of the depth for every wavelength received with the receiver 170. FIG. (A) is a normal display on the display screen 111. (B) is the figure which displayed the depth etc. of the worker buried in the deposit displayed on the display screen 111. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the scope of the present invention is not limited to these forms unless otherwise specified in the following description.

(First embodiment)
<Configuration of Digital Signage Device 100>
FIG. 1A is a perspective view of the digital signage device 100. The digital signage apparatus 100 includes a main body part 110 having an outer shape formed in a rectangular parallelepiped shape and a display screen 111 for displaying characters or images in color on the front surface, and a pedestal part 120 on which the main body part 110 is placed. Yes. The display screen 111 displays various information such as construction information, work information, and advertisements. The pedestal 120 is provided with a top plate 121 for placing the main body 110 on the top, and wheels 122 for moving the digital signage device 100 on the bottom. The main body 110 is fixed to the top plate 121.

  FIG. 1B is a front view of the worker 130. The worker 130 is a person who performs work at a work site such as a factory, a construction site, or a construction site. A mounting device 141 is mounted on the wrist of the worker 130 shown in FIG. 1B, and a mounting device 142 is mounted on the ankle. FIG. 1 (b) shows a state in which the mounting device 141 is mounted on both wrists of the body and the mounting device 142 is mounted on both ankles of the body, but only on one wrist or one ankle of the body. It may be attached. In addition, the worker 130 may include an attachment device 143 attached to the belt buckle, an attachment device 144 attached to a pocket of work clothes, or an attachment device 145 attached to a helmet. Furthermore, the worker 130 may have mounting devices that can be mounted at various body positions in addition to the mounting positions of these mounting devices.

<Configuration of Mounting Devices 141 to 145>
2A and 2B are schematic configurations of the mounting apparatuses 141 to 145. FIG.
Each of the mounting devices 141 to 145 disclosed in FIG. 2A includes a biological sensor 152 that measures the biological data of the worker 130. The biological sensor 152 is a sensor that collects biological data of the worker 130 such as body temperature, pulse, blood pressure, and the like. In addition, the mounting device 141 to the mounting device 145 include an environmental sensor 153 that measures environmental data such as temperature, humidity, and dust at the work site, and an acceleration sensor 154 that measures acceleration data of the worker 130, along with the biological sensor 152. Yes. Furthermore, the mounting device 141 to the mounting device 145 may include a pressure sensor 155 that measures the pressure of the deposit when the operator 130 is buried in the deposit.

  Furthermore, the mounting device 141 to the mounting device 145 include a primary battery such as a dry cell or a secondary battery such as a battery, and may be provided with a vibrator, an alarm, or the like for receiving notification. The mounting device 141 to the mounting device 145 include a first communication unit 157 that communicates with the digital signage device 100 through short-range wireless communication (for example, Bluetooth (registered trademark) or Wi-Fi (registered trademark)), and the biosensor 152. The data collected from the environmental sensor 153 and the acceleration sensor 154 (hereinafter referred to as disaster victim data) is transmitted to the digital signage device 100. The first communication unit 157 may be included in at least one of the mounting device 141 to the mounting device 145 and collectively transmit the victim data collected by other sensors to the digital signage device 100.

  The mounting device 141 to the mounting device 145 include a long wave transmission unit 158 that transmits an electromagnetic wave having a long wavelength from 1 kHz to 15 kHz, for example. The long wave transmission unit 158 transmits a rescue signal at a long wavelength of 1 kHz to 15 kHz when the pressure sensor 155 receives a predetermined pressure or more. The long wave transmission unit 158 preferably transmits frequencies of four different wavelengths, for example, 3 kHz, 6 kHz, 9 kHz, and 12 kHz. This is for the purpose of assuming a depth buried in the deposit as will be described later. Moreover, it is preferable that each long wave transmission part 158 can distinguish the rescue signal from the long wave transmission part 158 attached by changing the pulse number for 1 second. For example, the long wave transmission unit 158 of the mounting device 142 attached to the ankle transmits a rescue signal of 10 pulses / second, and the mounting device 145 attached to the helmet transmits a rescue signal of 5 pulses / second. This is to assume the posture of the worker buried in the deposit as will be described later.

  The processing unit 159 processes the output timing of the biological sensor 152, the environment sensor 153, the acceleration sensor 154, or the pressure sensor 155, and processes the power consumption of the power source. In addition, the processing unit 159 may perform processing so that communication from the first communication unit 157 stops when the pressure sensor 155 measures a predetermined pressure or more. Short-range wireless communication (for example, Bluetooth (registered trademark) or Wi-Fi (registered trademark)) uses ultra-short wavelength electromagnetic waves in the 2.4 GHz band, for example. The signal does not reach. For this reason, the processing unit 159 stops communication from the first communication unit 157 and suppresses the consumption of the primary battery or the secondary battery.

  The mounting device 142 or the mounting device 145 disclosed in FIG. 2B includes a pressure sensor 155 and a long wave transmission unit 158. In particular, this is to grasp the positions of the head and legs of the worker who is buried in the deposit. When the pressure sensor 155 measures the pressure of the deposit, the long wave transmission unit 158 transmits a rescue signal with a long wavelength. All the wearing devices may include the biosensor 152, the environment sensor 153, and the acceleration data 154. However, since the product cost is increased, a minimum necessary sensor may be provided. This is because it is difficult to obtain accurate biological data even if the wearing device 145 attached to the helmet has the biological sensor 152. That is, a part of the mounting device 141 to the mounting device 145 may be removed from the sensor or the transmission unit illustrated in FIG.

<Overview of the victim detection system 10>
FIG. 3 shows a part of the construction site where the victim detection system 10 is arranged. The victim detection system 10 includes a digital signage device 100, a long wave transmission unit 158 such as a mounting device 141, and a receiver 170.

  In FIG. 3, two digital signage devices, a digital signage device 100a and a digital signage device 100b, are arranged. The digital signage device 100a is arranged so as to face a sidewalk adjacent to a construction site, for example, and displays an outline of construction to a pedestrian or the like. Further, the digital signage apparatus 100b is disposed, for example, in a work site, and a work process, a safety confirmation display, and the like are given to the worker 130 and the like. In addition, the repeater 101 is arranged at a position away from the digital signage device 100a and the digital signage device 100b. The repeater 101 is arranged so as to be separated from the digital signage device 100a and the digital signage device 100b by an appropriate distance so that the entire work site is within a communication range of short-range wireless communication.

  The digital signage apparatus 100a is connected to the other digital signage apparatus 100b and connected to the Internet. The digital signage device 100b is connected to the digital signage device 100a and is not connected to the Internet. Of course, the digital signage apparatus 100b may be connected to the Internet. In the repeater 101 that relays short-range wireless communication, the communicable distance between the first communication unit 157 worn by the worker 130 and the second communication unit 112 (see FIG. 4) of the digital signage device 100 is extended. ing.

At the construction site, a hydraulic excavator machine 160 is disposed as an example of a work machine. The excavator machine 160 digs the ground with a bucket 162 attached to the tip of an arm 161. The excavator machine 160 includes a machine control unit 168 that performs various controls.
Furthermore, the arm 161 of the excavator machine 160 has a receiver 170 that receives an ultra-long wavelength or a long wave from the long wave transmission unit 158 worn by the operator 130. The receiver 170 has a detection coil and receives a long wave or a super long wave having a predetermined frequency. In the present embodiment, the receiver 170 is attached to the arm 161 of the excavator machine 160, but may be attached to the body of the excavator machine 160. The receiver 170 may be attached to another vehicle. When the receiver 170 is attached to the arm 161 of the excavator machine 160, it is easy to move the receiver 170 to a place higher or lower than the ground surface.

<Configuration of the victim detection system 10>
FIG. 4 shows a schematic configuration of the disaster victim detection system 10. The wearing devices 141 to 145 worn by the worker 130 include a biological sensor 152, an environment sensor 153, an acceleration sensor 154, and a pressure sensor 155. In addition, the mounting device 141 and the like include a first communication unit 157 and a long wave transmission unit 158 that perform short-range wireless communication.

The management server 200 of the administrator 135 manages a plurality of digital signage devices 100. The operating status and the physical condition of the worker 130 are collectively managed. Although the communication unit is not particularly drawn, the digital signage device 100 is connected by 3G or 4G communication or a dedicated line.
Also, the construction supervisor 133 at the construction site depicted in FIG. 3 has a communication terminal 190, such as a smartphone or a tablet terminal, that receives information such as a sudden physical change or accident of the worker 130. Although a communication unit is not particularly drawn on the communication terminal 190, the digital signage device 100 and the 3G, 4G communication or near field communication (for example, Bluetooth (registered trademark) or Wi-Fi (registered trademark)) Connecting.

  The excavator machine 160 includes a third communication unit 166 that performs short-distance wireless communication and a machine control unit 168 that controls the excavator machine 160. For example, when a forced stop signal of the excavator machine 160 is received from the digital signage device 100 via the third communication unit 166, the machine control unit 168 forcibly stops the arm 161 or the bucket 162 of the excavator machine 160. The receiver 170 attached to the arm 161 has a fourth communication unit 171 that performs short-distance wireless communication, and notifies the digital signage device 100 that has received an ultra-long wavelength or long wave via the fourth communication unit 171. connect.

  In addition to the display screen 111, the digital signage device 100 includes a second communication unit 112, a determination control unit 113 that processes contents displayed on the display screen 111, a storage unit 114 that stores biometric data, and sound or voice Has a sound generator 115 for generating The second communication unit 112 communicates with the first communication unit 157, the third communication unit 166, and the fourth communication unit 171 via short-range wireless communication. The second communication unit 112 stores the biological sensor 152, the environment sensor 153, and the acceleration sensor 154 in the storage unit 114 via the first communication unit 157, and the determination control unit 113 processes biological data and the like as necessary. . Furthermore, these worker data may be sent to the management server 200 of the administrator 135 and the communication terminal 190 of the supervisor 133 as necessary.

  Further, the judgment control unit 113 can display the worker data on the display screen 111. Further, the determination control unit 113 determines, based on the long wave received from the fourth communication unit 171, the depth of the long wave transmission unit 158 buried in the deposit or which of the mounting devices 141 to 145 is the long wave. The determination control unit 113 can also instruct the excavator machine 160 of the excavator machine 160 to stop the operation of the arm of the excavator machine 160.

<Operation of the victim detection system 10>
FIG. 5 is a flowchart of the operation of the disaster victim detection system 10. FIG. 6 is a diagram showing a state where an operator in the mine has been buried with deposits due to an accident. In the following description, as shown in FIG. 6, an example in which the mounting device 142 is mounted on the ankle and the mounting device 145 is mounted on the helmet will be described.

  In step S101 of FIG. 5, it is assumed that the worker 130 in the mine has been covered with deposits as depicted in FIG. Then, the pressure sensor 155 of the mounting device 142 worn by the worker 130 and the pressure sensor 155 of the mounting device 145 are activated by the pressure of the deposit. When the pressure sensor 155 is activated, the long wave transmission unit 158 of the mounting device 142 and the long wave transmission unit 158 of the mounting device 145 are activated. A rescue signal of 10 pulses / second is transmitted from the long wave transmission unit 158 of the mounting device 142 at frequencies of 3 kHz, 6 kHz, 9 kHz, and 12 kHz. Further, a rescue signal of 5 pulses / second is transmitted from the long wave transmission unit 158 of the mounting device 145 at frequencies of 3 kHz, 6 kHz, 9 kHz, and 12 kHz.

  In step S102, the rescuer moves the arm 161 of the excavator machine 160 and moves the bucket 162 to the mining position (front). Then, the rescuer moves the receiver 170 attached to the arm 161 to a position facing the ground of the deposit. The reason for moving the bucket 162 to the front is to keep the transmitted long wave as easy as possible by moving it as far away from the receiver 170 as possible.

  In step S103, the rescuer puts the reference long wave transmission unit 158 in the deposit and causes the receiver 170 to receive the long wave while changing the depth in the deposit. As shown in FIG. 6, for example, a reference long wave transmission unit 158 is attached to the tip of the measurement column 177. Similarly to the long wave transmission unit 158 of the mounting device 145, the long wave transmission unit 158 of the measurement column 177 transmits frequencies of 3 kHz, 6 kHz, 9 kHz, and 12 kHz. The measurement column 177 is driven to a depth of 1.0 m, a long wave is transmitted from the long wave transmission unit 158, and the long wave is received by the receiver 170. Subsequently, the measurement column 177 is driven to a depth of 1.5 m, and a long wave is transmitted from the long wave transmission unit 158. In this way, the measurement column 177 is driven from about 2.0 m to about 3.0 m, and long waves are transmitted from the long wave transmission unit 158, respectively. These transmitted long waves are received by the receiver 170, and the result received by the receiver 170 is stored in the storage unit 114 of the digital signage apparatus 100 via the fourth communication unit 171 and the second communication unit 112. The For example, a result as shown in FIG. 7 is stored. When the process of step S103 is completed, the measurement column 177 is extracted and the transmission of the long wave transmission unit 158 is stopped.

  In step S104 of FIG. 5, the determination control unit 113 sets a depth reference for each received long wave. For example, in the result of the received wavelength and depth shown in FIG. 7, all wavelengths can be detected at the depths of 0.5 m and 1.0 m. When the depth is 1.5 m, the 12 kHz wavelength cannot be received. When the depth is 2.0 m, the 9 kHz wavelength cannot be received. When the depth is 2.5 m, the 6 kHz wavelength cannot be received. When the depth is deeper than 3.0 m, This indicates that even a 3 kHz wavelength cannot be received. For this reason, the determination control unit 113 has a maximum depth of 1.0 m when a 12 kHz wavelength can be received, a maximum depth of 1.5 m when a 9 kHz wavelength can be received, and a maximum depth of 2.0 m and 12 kHz wavelength when a 6 kHz wavelength can be received. Is set to a maximum depth of 2.5 m. The set value is stored in the storage unit 114.

  The processing of step S103 and step S104 is performed by processing step S103 and step S104 when the construction site is decided, rather than processing after the rescuer is buried after the worker is buried with deposits. It is preferable to set a standard for the above. Moreover, it is preferable to set the depth reference for each long wave by processing step S103 and step S104 on the day when the weather is good and the deposits are dry and on the day when it rains.

  In addition, if the storage unit already has standards created with sediment such as nearby earth and sand, those standards may be used without performing the processing of Step S103 and Step S104. Note that the relationship between the long wave and the depth varies depending on the amount of water in the earth and sand containing a lot of sand, the earth and sand containing a lot of rock, the soil containing only the soil, and the sediment. A plurality of criteria in consideration of these complex factors may be prepared in advance so that an appropriate criteria can be selected from these criteria. As described above, when the reference is prepared, the processes in steps S103 and S104 may be skipped.

  In step S105 of FIG. 5, the determination control unit 113 determines whether the receiving unit 170 has received a rescue signal from the long wave transmission unit 158 of the mounting device 142 or the mounting device 145. If it is assumed that the receiving unit 170 cannot receive the signal, the standard based on the result of the received wavelength and depth shown in FIG. 7 indicates that the worker 130 is covered with deposits at a depth of 2.5 m or more. I can guess.

  In the case of NO, the process proceeds to step S106, the receiver 170 is moved, the arm 161 and the bucket 162 of the excavator machine 160 are moved, and 2.5 m of sediment is mined. Steps S102 and S105 are then repeated.

  If YES in step S105, the process proceeds to step S107. In step S <b> 107, the determination control unit 113 determines the depth of the long wave transmission unit 158 and the mounting position of the mounting device 142 or 145. As a first example, it is assumed that the receiver 170 receives a rescue signal of 10 pulses / second at frequencies of 3 kHz, 6 kHz, and 9 kHz. The determination control unit 113 determines that there is a long wave transmission unit 158 attached to the ankle at about 1.0 m to 1.5 m based on the frequency. If the receiver 170 does not receive a rescue signal of 5 pulses / second, the determination control unit 113 can determine that the head wearing the helmet is at a position deeper than 3.0 m, and the operator 130 can stand upside down. It can be inferred that it is buried in sediments.

  As a second example, it is assumed that the receiver 170 receives a rescue signal of 10 pulses / second at frequencies of 3 kHz, 6 kHz, 9 kHz, and 12 kHz and a rescue signal of 5 pulses / second at frequencies of 3 kHz, 6 kHz, 9 kHz, and 12 kHz. . It can be estimated that the judgment control unit 113 is buried in the deposit in a state where the worker 130 lies within 1.0 m.

  As a third example, it is assumed that the receiver 170 receives a rescue signal of 10 pulses / second at a frequency of 3 kHz and a rescue signal of 5 pulses / second at frequencies of 3 kHz and 6 kHz. The determination control unit 113 determines that there is a long wave transmission unit 158 attached to the ankle at a depth of about 2.0 m to 2.5 m, and a long wave transmission unit 158 attached to the helmet about 1.5 m to 2.0 m. To do. The judgment control unit 113 can estimate that the worker 130 is buried in the deposit while sitting.

In step S108, the depth and position of the long wave transmitter determined in step S107 are displayed on the display screen 111, or the sound is notified from the sound generator 115. The sound generator 115 utters, for example, “the depth of the victim's head is about 1.5 to 2.0 m, and the depth of the ankle of the victim is about 2.0 to 2.5 m”.
FIGS. 8A and 8B are examples displayed on the display screen 111 of the digital signage apparatus 100. FIG. 8A shows a normal construction site construction, and FIG. 8B shows a disaster in which an operator is buried with deposits.

  As shown in FIG. 8A, in normal times, information A11 that informs the worker 130 of the outline of the work and the work schedule is displayed, and the weather on the work day is displayed. As shown in FIG. 8B, in the event of a disaster, information B11 indicating that an ambulance or the like is to be communicated is displayed, and depth information B12 where the victim is buried and instruction information B13 for the deposit are displayed. The seismic intensity information B12 in FIG. 8B is the third example described in step S107. In the case of the third example, the limb of the worker 130 does not exist within a depth of 1.5 m. For this reason, instruction information for mining up to about 1.0 m is displayed in the bucket 162 of the excavator machine 160. The time can be shortened compared with mining by human power, and the possibility that the worker 130 who has been damaged can be saved increases.

Next, in step S109 of FIG. 5, the rescuer digs the excavator machine 160 to the extent that the worker 130 buried in the deposit is not damaged. After mining by this hydraulic excavator machine 160, step S <b> 102 and step S <b> 108 are processed again, and the receiving unit 170 receives the rescue signal from the mounting device 142 or the long wave transmission unit 158 of the mounting device 145, and the damaged worker The depth and posture of 130 may be confirmed.
In step S110, when approaching the buried worker 130 by about 1.0 m, mining by the excavator machine 160 is stopped, and the rescuer searches for the worker 130 by mining manually.

  As described above, the optimal embodiment of the present invention has been described in detail. However, as will be apparent to those skilled in the art, the present invention can be implemented with various modifications and variations within the technical scope thereof. Moreover, the features of each embodiment can be implemented in various combinations.

  For example, instead of the determination control unit 113 and the storage unit 114 of the digital signage device 100, the mechanical control unit 168 and the storage unit (not shown) of the excavator machine 160 may process the rescue signal from the receiver 170. Good. Further, a notebook personal computer may be used instead of the digital signage device 100. A bulldozer may be used instead of the excavator machine 160.

DESCRIPTION OF SYMBOLS 10 ... Disaster detection system 100, 100a, 100b ... Digital signage device 101 ... Repeater 110 ... Main part 111 ... Display screen, 112 ... 2nd communication part 113 ... Processing part, 114 ... Memory | storage part, 115 ... Sound generation part 120 ... Pedestal part, 121 ... Top plate, 122 ... Wheel 130 ... Worker (disaster), 133 ... Supervisor, 135 ... Administrator 141, 142, 143, 144, 145 ... Mounting device 152 ... Biosensor, 153 ... Environment Sensor 154 ... Acceleration sensor, 155 ... Pressure sensor 157 ... 1st communication part 160 ... Hydraulic excavator machine, 161 ... Arm, 162 ... Bucket 166 ... 3rd communication part, 168 ... Machine control part 170 ... Receiver, 171 ... 4th Communication unit 190 ... Communication terminal 200 ... Management server

Claims (8)

A long wave transmission unit that is attached to a victim buried in a deposit and transmits a long wave or a super long wave of a plurality of different wavelengths;
A receiver for receiving the long wave or the ultra long wave transmitted from the long wave transmission unit;
A storage unit for storing a relationship between the plurality of different wavelengths and depths in the deposit;
A determination unit that determines the depth of the victim based on the relationship between the wavelength and the depth by the receiver receiving the long wave or the ultra long wave;
A notification unit for notifying the depth of the victim determined by the determination unit;
Victim sensing system.   The disaster receiver system according to claim 1, wherein the receiver is attached to the arm of an excavator machine that moves an arm having a bucket to mine deposits.   The disaster notification system according to claim 1, wherein the notification unit includes a display screen for displaying information and a sound generation unit for generating sound. Including a digital signage having the display screen, the sound generation unit, the storage unit, and the determination unit;
When the determination unit determines the depth of the disaster victim, the display screen displays the depth of the disaster victim, the sound generation unit utters the depth of the disaster victim,
The disaster detection system according to claim 3, wherein before the determination unit determines the depth of the disaster victim, the display screen displays a status of a work site where the digital signage is arranged. A pressure sensor for measuring the pressure of the deposit;
The disaster detection system according to any one of claims 1 to 4, wherein the long wave transmission unit transmits the long wave or the super long wave when the pressure of the deposit is measured. The disaster victim is equipped with an environmental sensor that measures environmental data at a work site and a communication unit that communicates the environmental data measured by the environmental sensor by short-range wireless communication.
The disaster detection system according to claim 5, wherein the communication unit stops the short-range wireless communication when measuring the pressure of the deposit. The disaster victims are each equipped with the long wave transmitter at different locations on the body,
The long wave transmission unit transmits different relief signals,
The victim according to any one of claims 1 to 6, wherein the determination unit determines from which part of the body of the victim a long wave or a super long wave based on the different relief signal. Sensing system.   The victim determination system according to claim 7, wherein the determination unit estimates the attitude of the victim based on the different relief signals.