Disaster prevention system and disaster prevention method

Abstract

To obtain a disaster prevention device, a disaster prevention system, and a disaster prevention method capable of automatically urging people to take an appropriate action under a situation where a natural disaster is likely to occur.SOLUTION: A disaster prevention device comprises: a sensor for detecting a value which indicates a degree of occurrence of a natural disaster; slave station storage means for storing a predetermined voice message; a loudspeaker for outputting a voice message; slave station communication means for transmitting sensor data which includes information on the detection value of the sensor to an external information processing device; and slave station control means for comparing the detected value with a predetermined threshold value, and outputting the voice message to the loudspeaker and transmitting the sensor data to an information processing device via the slave station communication means when the detected value is greater than the threshold value.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention is a method for monitoring natural phenomena that may cause natural disasters. Prevention The present invention relates to a disaster prevention system and a disaster prevention method. [Background technology]

[0002] Conventionally, outdoor public address systems equipped with a loudspeaker for broadcasting necessary information to residents when a disaster such as flooding occurs have been known (see, for example, Patent Document 1). In the disaster prevention radio system disclosed in Patent Document 1, a user can output a voice message to the loudspeaker using a portable radio without opening the door of the outdoor public address system.

[0003] Furthermore, a measurement system that measures the water level and water flow in rivers and oceans in order to prevent or reduce water damage such as floods and tsunamis is known (see, for example, Patent Document 2). The measurement system disclosed in Patent Document 2 predicts the occurrence of flood damage from the water level and water flow detected by a measurement sensor installed in a river or the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-181690 [Patent Document 2] JP 2014-222174 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the disaster prevention radio system disclosed in Patent Document 1, the user of the outdoor public address system must determine the flood situation and consider the message to be output from the public address speaker. Therefore, the determination of the flood situation and the message output from the public address speaker differ depending on the user. The measurement system disclosed in Patent Document 2 predicts the occurrence of flooding, but does not go so far as to announce evacuation advisories to residents. In situations where there is a risk of a natural disaster such as flooding occurring, it is possible to automatically encourage people to take appropriate action. Prevention A disaster prevention system and method were needed. [Means for solving the problem]

[0007] The disaster prevention system according to the present invention includes a sensor for detecting a value indicating the occurrence degree of a natural disaster, a loudspeaker, and , a timer to measure time and have Multiple a loudspeaker device, and a sensor data including information on the detection value of the sensor Multiple and an information processing device for receiving information from the loudspeaker, Multiple The loudspeaker , Preliminary Predefined voice message and a slave station identifier corresponding to the loudspeaker device, which is different for each of the loudspeaker devices. A slave station storage means for storing the a slave station communication means for transmitting the sensor data including the slave station identifier to the information processing device; comparing the detected value with a predetermined threshold value, and outputting the voice message from the loudspeaker if the detected value is greater than the threshold value; The time when it is determined that the detection value is greater than the threshold is obtained from the timer, and information about the obtained time is included in the sensor data. A slave station control means for transmitting the sensor data to the information processing device via the slave station communication means. the information processing device includes a master station communication means for receiving the sensor data from the plurality of loudspeaker devices, a master station storage means for storing map information in which a position is recorded corresponding to the slave station identifier for each of the plurality of loudspeaker devices, a master station control means for creating a disaster map showing information on the detection value and information on the time at the position of each of the loudspeaker devices using the sensor data and the map information collected from the plurality of loudspeaker devices, and a display unit for displaying the disaster map. This is what we do.

[0008] The disaster prevention method according to the present invention comprises: A system including a plurality of loudspeakers and an information processing device, A sensor that detects the value indicating the occurrence of a natural disaster and a predefined voice message and a slave station identifier corresponding to the loudspeaker device, which is different for each of the loudspeaker devices. Remember Substation a storage means; a loudspeaker for outputting the voice message; a slave station that transmits sensor data including a slave station identifier and information on a detection value detected by the sensor to the information processing device; Communication means and The information processing device includes a master station communication means for receiving the sensor data from the plurality of loudspeaker devices, a master station storage means for storing map information in which positions of the plurality of loudspeaker devices are recorded in correspondence with the slave station identifiers, and a display unit. Disaster Prevention system A disaster prevention method according to the following: The plurality of loudspeakers include before Examinationcomparing the detected value with a predetermined threshold value; and if the detected value is greater than the threshold value, The plurality of loudspeakers include outputting the voice message through the loudspeaker; The time when it is determined that the detection value is greater than the threshold is obtained from the timer, and information about the obtained time is included in the sensor data. before Note The survey data was Substation Through communication means The above transmitting the information to an information processing device; A step in which the information processing device creates a disaster map showing information on the detection values ​​and information on the time at the positions of the loudspeaker devices by using the sensor data collected from the plurality of loudspeaker devices and the map information, and a step in which the information processing device displays the disaster map on the display unit. It has the following characteristics. Effect of the Invention

[0009] According to the present invention, a value indicating the occurrence degree of a natural disaster is monitored, and when it is determined that the occurrence degree of a disaster is high, a predetermined voice message is output from a loudspeaker and information indicating the occurrence degree of the disaster is transmitted to an external information processing device, so that people near the disaster prevention device can take appropriate action such as evacuation or waiting based on the value indicating the occurrence degree of a natural disaster. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram showing a configuration example of a disaster prevention system according to a first embodiment; [Diagram 2] 2 is a schematic diagram showing a configuration example of the disaster prevention system shown in FIG. 1. [Diagram 3] 3 is a schematic diagram for explaining the configuration and operation of the submersion sensor shown in FIG. 2. [Figure 4] 2 is a block diagram showing an example of the configuration of the loudspeaker shown in FIG. 1. [Diagram 5] 2 is a block diagram showing an example of a configuration of a relay device shown in FIG. 1. [Figure 6] 2 is a block diagram showing an example of a configuration of the information processing device shown in FIG. 1. [Figure 7] 4 is a block diagram showing another example configuration of the loudspeaker according to the first embodiment. FIG. [Figure 8] 1 is a topographical map showing a schematic example of an installation of a loudspeaker system according to a first embodiment. [Figure 9] 4 is a flowchart showing an operation procedure of the loudspeaker according to the first embodiment. [Figure 10] 4 is a sequence diagram showing an operation procedure of the disaster prevention system according to the first embodiment. FIG. [Figure 11] 10 is a block diagram showing an example of the configuration of a loudspeaker of a disaster prevention system according to Modification 1. FIG. [Figure 12] 1 is a topographical map showing a schematic example of an installation of a plurality of loudspeaker devices in the first modification. [Figure 13] FIG. 11 is a diagram showing an example of an image that the information processing device displays on a display unit in the first modification example. [Figure 14] FIG. 11 is a schematic diagram showing a configuration example of a disaster prevention system according to a second embodiment. [Figure 15] 15 is a block diagram showing an example of the configuration of the loudspeaker shown in FIG. 14. [Figure 16] 10 is a flowchart showing an operation procedure of the loudspeaker according to the second embodiment. [Figure 17] FIG. 2 is a schematic diagram showing an example of the configuration of a loudspeaker system that combines the first and second embodiments. [Figure 18] FIG. 11 is a block diagram showing an example of the configuration of a loudspeaker of a disaster prevention system according to Modification 2. [Figure 19] FIG. 20 is a topographical map showing a schematic example of the installation of the loudspeaker system shown in FIG. 18 in Modification 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Embodiment 1 The configuration of a disaster prevention system including the disaster prevention device of the first embodiment will be described. FIG. 1 is a diagram showing an example of the configuration of the disaster prevention system according to the first embodiment. The disaster prevention system 1 has a loudspeaker 2 that outputs sound, and an information processing device 3 that receives data wirelessly from the loudspeaker 2. The loudspeaker 2 is used, for example, as a loudspeaker in a disaster prevention wireless system for municipal disaster prevention. FIG. 1 shows a case in which the disaster prevention system 1 has a relay device 4, but the relay device 4 does not have to be provided in the disaster prevention system 1. The relay device 4 serves to relay wireless communication between the loudspeaker 2 and the information processing device 3. The loudspeaker 2 corresponds to the disaster prevention device.

[0012] In the first embodiment, the loudspeaker 2 is installed on a rod-shaped structure that stands vertically, such as a utility pole. The loudspeaker 2 is not limited to being installed on a rod-shaped structure, and may be installed on the wall of a building. The information processing device 3 is installed in a building BD that serves as a disaster response base. When the loudspeaker 2 is installed in a city, ward, town, or village, the disaster response base is, for example, a city, ward, town, or village office building. If the information processing device 3 is used as a master station for the disaster prevention base, the loudspeaker 2 functions as a slave station that provides information on the occurrence degree of natural disasters to the master station.

[0013] Fig. 2 is a schematic diagram showing an example of the configuration of the disaster prevention system shown in Fig. 1. For the sake of explanation, the dimensions of the loudspeaker 2, relay device 4, and information processing device 3 shown in Fig. 2 are shown to have different scales. Fig. 2 shows a case in which the loudspeaker 2 is installed on a utility pole, and the information processing device 3 is installed on the second floor of a two-story building BD. The loudspeaker 2 has an antenna 21 that outputs radio waves, a loudspeaker speaker 22 that outputs sound, a main body 23, an operation unit 24, and a water submersion sensor 25.

[0014] In order to facilitate operation by a user (not shown), the operation unit 24 is provided at, for example, eye level when an adult is standing. The height H1 from the ground to the bottom surface of the operation unit 24 is, for example, 140 to 160 cm. The submersion sensor 25 is provided below the operation unit 24. The main body 23 is provided at a position higher than the operation unit 24 on the utility pole. The height H2 from the ground to the bottom surface of the main body 23 is, for example, 3 m or more, which corresponds to the height under the second floor. A connection part (not shown) for connecting a cable (not shown) for supplying power from an external source to the loudspeaker 2 is provided at a position higher than the operation unit 24 on the utility pole. The loudspeaker 22 is provided at the top of the utility pole. In the configuration example shown in FIG. 2, the antenna 21 is provided between the loudspeaker 22 and the main body 23, but the antenna 21 may be provided at the top of the utility pole, similar to the loudspeaker 22.

[0015] 2, the relay device 4 has an antenna 41. The antenna 41 has an antenna 41a that receives radio waves output from the loudspeaker 2, and an antenna 41b that transfers the radio waves received from the loudspeaker 2 to the information processing device 3. The information processing device 3 has an antenna 31 that receives radio waves transmitted from the loudspeaker 2.

[0016] The submersion sensor 25 is an example of a sensor that detects a value indicating the occurrence degree of a natural disaster. A natural disaster occurs due to a combination of a predisposition specific to the land and a trigger. A trigger is a natural phenomenon such as an earthquake, typhoon, heavy rain, or tsunami that triggers a disaster. The submersion sensor 25 detects submergence at a predetermined position due to a flood or other water damage triggered by a natural phenomenon such as a typhoon or heavy rain. The position of the target for submergence detection is, for example, height H1 shown in FIG. 2. The submergence sensor 25 is also called a flood sensor or a submersion sensor.

[0017] Here, an example of the configuration of the submersion sensor 25 will be described. Fig. 3 is a schematic diagram for explaining the configuration and operation of the submersion sensor shown in Fig. 2. First, the configuration of the submersion sensor 25 will be described. As shown in Fig. 3, the submersion sensor 25 has a rectangular parallelepiped housing 51 and a detection circuit 70. The material of the housing 51 is, for example, an insulating material such as synthetic resin.

[0018] A float 52 is provided in the housing 51. A metal plate 55 is attached to the upper surface of the float 52. A hole is formed in the lower surface of the housing 51 to allow water to enter the housing 51. A fine hole 54 is formed in the upper side of the housing 51 to allow air to escape from the housing 51. In the detection circuit 70, a DC power source 74 and a resistive element 73 are connected in series to a conductor connecting the terminal 71 and the terminal 72. A voltmeter 75 is connected in parallel to the resistive element 73. The tips of the terminals 71 and 72 penetrate the upper surface of the housing 51 and are located inside the housing 51.

[0019] Next, the operation of the submersion sensor 25 will be described with reference to Fig. 3. When the submersion sensor 25 is in a state before being submerged, as shown on the left side of Fig. 3, the terminals 71 and 72 are not electrically connected, so the voltmeter 75 does not detect a voltage. Since no current flows through the resistive element 73, the voltmeter 75 transmits, for example, a signal of 0 V to the main body 23 as the detection value Sg. The signal of the detection value Sg at this time is referred to as an off signal.

[0020] If the river bank near the flood sensor 25 breaks and a flood occurs from the state shown on the left side of FIG. 3, water Wa enters the housing 51 through the hole 53. When water Wa enters the housing 51 from the hole 53, air in the housing 51 escapes through the hole 54, and the float 52 moves vertically upward as the water level rises. Then, as shown on the right side of FIG. 3, the terminals 71 and 72 come into contact with the plate 55, and a current flows in the detection circuit 70. The voltmeter 75 detects the potential difference between the resistive element 73 by the current flowing through the resistive element 73, and transmits information on the detected potential difference to the main body 23 as a detection value Sg. The detection value Sg at this time is, for example, a 3V signal, and is called an ON signal.

[0021] Next, the configuration of the loudspeaker 2 will be described in detail. Fig. 4 is a block diagram showing an example of the configuration of the loudspeaker shown in Fig. 1. A main body 23 of the loudspeaker 2 has a slave station communication means 11, a slave station storage means 12, a slave station control means 13, a power control means 14, and a storage battery 15. The slave station communication means 11 is connected to an antenna 21 via a power feeder (not shown).

[0022] The slave station communication means 11 wirelessly transmits data to the information processing device 3. The slave station storage means 12 stores a predetermined voice message and a predetermined threshold value thw. The voice message is a message indicating that a flood has occurred. The threshold value thw is a value that serves as a criterion for determining whether or not a water damage such as a flood has occurred based on the detection value Sg of the submersion sensor 25. The threshold value thw corresponds to a danger threshold that serves as a criterion for determining whether a flood has occurred. The threshold value thw is, for example, 2.5 V.

[0023] When the slave station control means 13 receives the detection value Sg from the submersion sensor 25, it compares the detection value Sg with a threshold value thw. If the detection value Sg is greater than the threshold value thw, the slave station control means 13 outputs a voice message to the loudspeaker 22 and transmits sensor data including information on the detection value Sg to the information processing device 3 via the slave station communication means 11.

[0024] The power control means 14 converts power supplied from the outside via a connection unit (not shown) into power of a predetermined voltage, and supplies the converted power to each unit such as the slave station communication means 11, the loudspeaker 22, and the submersion sensor 25. The power control means 14 also keeps the storage battery 15 constantly charged using power supplied from the outside via a connection unit (not shown). When the power supply from the outside is cut off, the power control means 14 changes the power supply source to the storage battery 15, and supplies the power supplied from the storage battery 15 to each unit such as the slave station communication means 11, the loudspeaker 22, and the submersion sensor 25. The DC power supply 74 shown in FIG. 3 corresponds to the power source supplied to the submersion sensor 25 by the power control means 14.

[0025] An example of the hardware configuration of the main body 23 shown in Fig. 4 will be described. When the functions of each means of the main body 23 except for the storage battery 15 are executed by software, the slave station communication means 11, the slave station storage means 12, the slave station control means 13, and the power control means 14 are configured by a processor (not shown) such as a CPU (Central Processing Unit) and a memory (not shown). The memory stores a program, and the processor executes processing according to the program, thereby realizing the function of each means such as the slave station communication means 11. The memory is, for example, a non-volatile semiconductor memory such as a flash memory. The memory may also have a volatile semiconductor memory such as a RAM (Random Access Memory).

[0026] The functions of each of the slave station communication means 11, slave station storage means 12, slave station control means 13, and power control means 14 may be realized by a processing circuit (not shown) such as an ASIC (Application Specific Integrated Circuit). The functions of each of the slave station communication means 11, slave station storage means 12, slave station control means 13, and power control means 14 may be realized by one processing circuit or by separate processing circuits.

[0027] Next, the configuration of the relay device 4 will be described in detail. Fig. 5 is a block diagram showing an example of the configuration of the relay device shown in Fig. 1. The relay device 4 has a communication control means 42, a power control means 43, and a storage battery 44. The communication control means 42 is connected to antennas 41a and 41b via a power supply line (not shown). When the communication control means 42 receives sensor data from the loudspeaker device 2, it transfers the received sensor data to the information processing device 3.

[0028] The power control means 43 converts the power supplied from the outside into power of a predetermined voltage and supplies the converted power to the communication control means 42. The power control means 43 uses the power supplied from the outside to keep the storage battery 44 constantly charged. When the power supply from the outside is cut off, the power control means 43 changes the power supply source to the storage battery 44 and supplies the power supplied from the storage battery 44 to the communication control means 42.

[0029] Next, the configuration of the information processing device 3 will be described in detail. Fig. 6 is a block diagram showing an example of the configuration of the information processing device shown in Fig. 1. The information processing device 3 is, for example, a server device. The information processing device 3 has a control unit 32, an input unit 33, and a display unit 34. The control unit 32 has a master station communication means 35, a master station storage means 36, and a master station control means 37. The master station communication means 35 is connected to the antenna 31 via a power supply line (not shown). The input unit 33 is, for example, an input device such as a keyboard and a mouse. The display unit 34 is, for example, a display device.

[0030] The master station storage means 36 stores map information in which the position of the loudspeaker 2 is recorded. The map information has information on structures such as buildings and roads and the position of each structure, corresponding to latitude and longitude. When the master station communication means 35 wirelessly receives sensor data from the loudspeaker 2 or the relay device 4, it transmits the received sensor data to the master station control means 37. The master station control means 37 uses the sensor data acquired from the loudspeaker 2 and the map information to create a disaster map in which information indicated by the detection value Sg is added to the position of the loudspeaker 2. The master station control means 37 causes the display unit 34 to display the created disaster map.

[0031] An example of the hardware configuration of the control unit 32 shown in FIG. 6 will be described. When the functions of each means of the control unit 32 are executed by software, the master station communication means 35, the master station storage means 36, and the master station control means 37 are configured by a processor (not shown) and a memory (not shown). The memory stores a program, and the processor executes processing according to the program, thereby realizing the functions of each means such as the master station communication means 35. In addition, the functions of each means of the master station communication means 35, the master station storage means 36, and the master station control means 37 may be realized by a processing circuit (not shown) such as an ASIC. The functions of each means of the master station communication means 35, the master station storage means 36, and the master station control means 37 may be realized by one processing circuit, or may be realized by separate processing circuits.

[0032] The loudspeaker 2 may generate its own power without receiving power from an external source. FIG. 7 is a block diagram showing another example of the configuration of the loudspeaker according to the first embodiment. The loudspeaker 2a shown in FIG. 7 has a solar cell 60 instead of a connection unit (not shown) as compared with the configuration shown in FIG. 4. The loudspeaker 2a shown in FIG. 7 does not have an operation unit 24, but may have the operation unit 24. The power control means 14 uses the power supplied from the solar cell 60 to distribute power to each means and charge the storage battery 15. The loudspeaker 2a does not need to receive power from an external source. Therefore, for example, the loudspeaker 2a can be installed away from residential areas.

[0033] The operation of the disaster prevention system 1 according to the first embodiment will be described with reference to Figs. 8 to 10. Fig. 8 is a topographical map showing a schematic example of an installation of a loudspeaker device according to the first embodiment. The interval between contour lines is 50 m. In other words, the altitude changes by 50 m between adjacent contour lines. In the topographical map shown in Fig. 8, the information processing device 3 described with reference to Fig. 6 is installed in the building BD1 of the village office.

[0034] Referring to FIG. 8, the river Rv1 flows from east to west and meanders greatly between the mountains Mt1 and Mt2. The area around the meander is where the flow direction of the river Rv1 changes significantly, so when there is a lot of water, a large force is applied to the levee. Also, although not shown in FIG. 8, when it rains, the water flowing down the western slope of the mountain Mt1 and the water flowing down the eastern slope of the mountain Mt2 form a tributary between these two mountains, and the tributary flows into the area around the meander of the river Rv1. Therefore, there is a high risk that the area around the meander of the river Rv1 will become a levee breach point. In order to detect floods that occur when the river Rv1 breaches the area around the meander, the loudspeaker device 2 is installed at the position shown in FIG. 8.

[0035] Also, referring to FIG. 8, mountain Mt1 has a ridge extending in the southwest direction, which impedes wireless communication between the loudspeaker device 2 and building BD1. For this reason, in the topographical map shown in FIG. 8, a relay device 4 is installed to relay wireless communication between the loudspeaker device 2 and the information processing device 3 in building BD1. When the information processing device 3 is installed in the building BD2 shown by the dashed line, there is no obstacle to wireless communication between the loudspeaker device 2 and building BD1, so the relay device 4 does not need to be installed. When there are no residences around the loudspeaker device 2 in the topographical map shown in FIG. 8, it is preferable that the loudspeaker device 2 is the loudspeaker device 2a shown in FIG. 7. In this case, it is not necessary to install a cable that supplies power to the loudspeaker device 2 across the river Rv1.

[0036] The operation of the disaster prevention system 1 will be described assuming that the loudspeaker 2, relay device 4, and building BD1 are installed as shown in Fig. 8. Fig. 9 is a flowchart showing the operation procedure of the loudspeaker according to the first embodiment. Fig. 10 is a sequence diagram showing the operation procedure of the disaster prevention system according to the first embodiment.

[0037] The slave station control means 13 receives the detection value Sg from the submersion sensor 25 at a predetermined period (step S101). The slave station control means 13 compares the received detection value Sg with a threshold value thw and determines whether the detection value Sg is greater than the threshold value thw (step S102). If the detection value Sg is equal to or less than the threshold value thw, the slave station control means 13 returns to the process of step S101.

[0038] In the topographical map shown in Fig. 8, if the river Rv1 breaks its bank near the meandering, the area in which the loudspeaker device 2 is installed will be flooded, and the signal transmitted from the submersion sensor 25 to the slave station control means 13 will switch from an OFF signal to an ON signal. In this case, since the detection value Sg becomes greater than the threshold value thw in the determination of step S102, the slave station control means 13 will output an audio message from the loudspeaker 22 (step S103 in Fig. 9, step S151 in Fig. 10). The audio message at this time is, for example, a message informing the user that a flood has occurred.

[0039] Next, the slave station control means 13 transmits sensor data including information on the detection value Sg to the information processing device 3 via the slave station communication means 11 (step S104). In the case of the topographical map shown in Fig. 8, the relay device 4 receives the sensor data transmitted from the loudspeaker device 2 in step S152 shown in Fig. 10. The relay device 4 transfers the received sensor data to the information processing device 3 (step S153).

[0040] In step S154 shown in FIG. 10, when the master station communication means 35 of the information processing device 3 receives the sensor data, it transmits the received sensor data to the master station communication means 35. The master station control means 37 uses the sensor data acquired from the loudspeaker device 2 and map information to create a disaster map in which information indicated by the detection value Sg is added to the position of the loudspeaker device 2. The information indicated by the detection value Sg is, for example, information indicating that a flood has occurred. The master station control means 37 causes the display unit 34 to display the created disaster map. As a result, the information of the sensor data is displayed on the display unit 34 (step S155).

[0041] In step S103 in Fig. 9 and step S151 in Fig. 10, people near the loudspeaker 2 hear the audio message "A flood has occurred" output from the loudspeaker 22 and can quickly run away from the loudspeaker 2 or take refuge in a nearby building. Also, in step S155 in Fig. 10, a disaster prevention officer at a disaster response center can see the disaster map displayed on the display unit 34 and quickly find out that the river Rv1 has breached its levee near the loudspeaker 2 and caused a flood. Furthermore, the disaster prevention officer can predict the future spread of the flood damage by considering the point on the river Rv1 displayed on the disaster map that is closest to the loudspeaker 2 as the point where the flood occurred.

[0042] The disaster prevention device of the first embodiment includes a submersion sensor 25 that detects a value indicating the occurrence degree of a natural disaster, a slave station storage means 12 that stores a predetermined voice message, a loudspeaker 22 that outputs the voice message, a slave station communication means 11, and a slave station control means 13. The slave station communication means 11 transmits sensor data including information on a detection value Sg of the submersion sensor 25 to an information processing device 3. The slave station control means 13 compares the detection value Sg with a predetermined threshold value thw, and when the detection value Sg is greater than the threshold value thw, causes the loudspeaker 22 to output the voice message and transmits the sensor data to the information processing device 3.

[0043] The disaster prevention system 1 of the present embodiment 1 includes a loudspeaker 2 having a submersion sensor 25 for detecting a value indicating the occurrence degree of a natural disaster and a loudspeaker 22, and an information processing device 3 for receiving sensor data including information on the detection value Sg of the submersion sensor 25 from the loudspeaker 2. The loudspeaker 2 includes a slave station communication means 11, a slave station storage means 12, and a slave station control means 13. The slave station communication means 11 transmits the sensor data to the information processing device 3. The slave station storage means 12 stores a predetermined voice message. The slave station control means 13 compares the detection value Sg with a predetermined threshold thw, and when the detection value Sg is greater than the threshold thw, causes the loudspeaker 22 to output the voice message and transmits the sensor data to the information processing device 3.

[0044] According to the first embodiment, the loudspeaker 2 monitors the value indicating the occurrence degree of a natural disaster, and when it determines that the occurrence degree of a disaster is high, it outputs a voice message such as an evacuation advisory from the loudspeaker 22, and transmits information indicating the occurrence degree of the disaster to the information processing device 3 installed at the disaster prevention base. People in the vicinity of the loudspeaker 2 can take appropriate action such as evacuation or waiting based on the value indicating the occurrence degree of the natural disaster. Furthermore, a disaster prevention officer at a disaster countermeasure base can grasp approximately which areas are flooded by utilizing the sensor data received by the information processing device 3, and therefore can carry out flexible relief activities. Furthermore, a disaster prevention officer can predict the future expansion of flood damage by utilizing the sensor data received by the information processing device 3. According to the first embodiment, it is possible to detect the occurrence of flood damage in real time, output an alarm, and collect information.

[0045] Conventionally, when the water level of a river rises due to a typhoon or torrential rain, a disaster prevention officer at a disaster countermeasure center predicts a levee breach from the water level measured by a water level gauge, but after the levee breach, the disaster prevention officer and residents near the breached part of the levee were unable to know the situation after the breach. In contrast, according to the present embodiment 1, the loudspeaker 2 is provided with a submersion sensor 25 that detects submersion, and when the submersion sensor 25 detects submersion, an alarm is output from the loudspeaker 22. Therefore, a flood warning after the breach can be notified as a voice message to people near the breached part of the levee more quickly. In addition, the loudspeaker 2 transmits sensor data to the information processing device 3, so that the disaster prevention officer can also know that the levee has been breached from the sensor data received by the information processing device 3.

[0046] Furthermore, since main body 23 is installed at a high position of 3 m or more and is equipped with storage battery 15, it can operate for a certain period of time even if it is submerged at a height of less than 3 m above ground level, for example, up to operation unit 24. Public address system 2 can operate even in emergencies such as power outages.

[0047] (Variation 1) A modified example of the disaster prevention system 1 of the first embodiment will be described. In the present modified example 1, the disaster prevention system 1 has a plurality of loudspeaker devices 2. Fig. 11 is a block diagram showing an example of the configuration of the loudspeaker devices of the disaster prevention system according to the modified example 1.

[0048] The configuration of the loudspeaker of the first modification will be described with reference to Fig. 11. The main body 23 of the loudspeaker 2b has a timer 16 that measures time. The slave station storage means 12 stores a slave station identifier that is different for each of the multiple loudspeaker units 2b and corresponds to the unit itself. The slave station communication means 11 includes the slave station identifier of the unit itself in sensor data and transmits the sensor data to the information processing device 3. When transmitting the sensor data, the slave station control means 13 may obtain from the timer 16 the time when it is determined that the detection value Sg is greater than the threshold value, and include information on the obtained time in the sensor data.

[0049] Next, the operation of the disaster prevention system 1 of the present modified example 1 will be described with reference to Fig. 12. Fig. 12 is a topographical map that shows a schematic example of an installation of a plurality of loudspeaker devices in the modified example 1. Fig. 12 shows a case where there are four loudspeaker devices 2b, but the number of loudspeaker devices 2b is not limited to four. Here, a case where the river Rv1 breaks its bank near the loudspeaker device 2b-2 in the topographical map shown in Fig. 12 will be described. When the submersion sensor 25 of the loudspeaker device 2b-2 detects submersion, the loudspeaker device 2b-2 transmits sensor data including a slave station identifier to the information processing device 3. In addition to the slave station identifier, time information may be included in the sensor data.

[0050] The master station control means 37 of the information processing device 3 uses the sensor data and map information collected from the multiple loudspeaker devices 2b-1 to 2b-4 to create a disaster map showing information on the detection value Sg at the position of each of the loudspeaker devices 2b-1 to 2b-4. Since each sensor data includes a slave station identifier, the master station control means 37 can determine whether a flood has occurred at each position of the loudspeaker devices 2b-1 to 2b-4. The master station control means 37 causes the display unit 34 to display the created disaster map.

[0051] Fig. 13 is a diagram showing an example of an image that the information processing device displays on the display unit in Modification 1. The image shown in Fig. 13 is an example of a disaster map, and for the sake of convenience, symbols, leader lines, and arrows that are not displayed in normal images are shown in Fig. 13 in the same way as in Fig. 12. In the image shown in Fig. 13, the area where water has spread from the river Rv1 due to a levee breach is shown by a dot pattern.

[0052] Because the detection value Sg of the submersion sensor 25 of the loudspeaker devices 2b-1, 2b-3, and 2b-4 is equal to or less than the threshold value thw, the master station control means 37 causes the disaster map to display that no flood damage has occurred. Also, because the detection value Sg of the submersion sensor 25 of the loudspeaker device 2b-2 is greater than the threshold value thw, the master station control means 37 causes the disaster map to display that a flood has occurred as information indicated by the detection value Sg. By providing each of the multiple loudspeaker devices 2b installed over a wide area with a flood detection function, it is possible to detect the occurrence of flood damage in real time, and to issue an alarm and collect information.

[0053] Furthermore, since each of the loudspeaker devices 2b-1 to 2b-4 has a timer 16, it may determine the time and transmit the sensor data to the information processing device 3 at different times. In this case, it is possible to prevent a situation in which two or more of the loudspeaker devices 2b-1 to 2b-4 transmit sensor data simultaneously, resulting in the occurrence of a loudspeaker device 2b whose sensor data cannot be received by the information processing device 3.

[0054] Furthermore, if time information is included in the sensor data, the information processing device 3 can determine the time at which the detection value Sg became greater than the threshold value in each loudspeaker device 2b, even if the information processing device 3 receives sensor data from the loudspeaker devices 2b-1 to 2b-4 at different times. If the master station control means 37 displays time information together with information indicated by the detection values ​​Sg of the loudspeaker devices 2b-1 to 2b-4 on the disaster map, disaster prevention personnel can more easily predict the future spread of flood damage based on time-series changes in the submerged positions of each loudspeaker device 2b.

[0055] Furthermore, the map information may not only have two-dimensional information on the structures and their positions corresponding to latitude and longitude, but also three-dimensional information including height. In this case, the master station control means 37 can simulate how water will spread after a levee break based on the elevation difference of the land, and display the simulation results on the disaster map.

[0056] Embodiment 2 In the second embodiment, in response to rising water levels in residential areas due to flooding, a loudspeaker system notifies residents by voice whether they should evacuate or stay in their homes, and also notifies a disaster prevention center of the water level situation.

[0057] In the present embodiment 2, the same components as those described in the embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. Also, in the present embodiment 2, the differences from the configuration and operation of the embodiment 1 will be mainly described, and description of the same configuration and operation as the embodiment 1 will be omitted.

[0058] The configuration of the disaster prevention system according to the second embodiment will be described. FIG. 14 is a schematic diagram showing an example of the configuration of the disaster prevention system according to the second embodiment. For the purpose of explanation, the dimensions of the loudspeaker 2c, the relay device 4, and the information processing device 3 shown in FIG. 14 are scaled to different scales. FIG. 14 shows a case where the loudspeaker 2c is installed on a utility pole. Compared to the configuration of the loudspeaker 2 shown in FIG. 2, the loudspeaker 2c has a water level sensor 26 instead of the submersion sensor 25. As shown in FIG. 14, the water level sensor 26 is provided at the bottom of the utility pole.

[0059] The water level sensor 26 is an example of a sensor that detects a value indicating the degree of occurrence of a natural disaster. The water level sensor 26 detects a value indicating the degree of occurrence of flood damage caused by natural phenomena such as typhoons and torrential rains. The water level sensor 26 detects the water level, which is the depth of water pooled on the ground. The water level sensor 26 is provided at the bottom of the utility pole, so that it can detect water when the water level is low. The water level sensor 26 is, for example, a measurement sensor disclosed in Patent Document 2.

[0060] Fig. 15 is a block diagram showing an example of the configuration of the loudspeaker shown in Fig. 14. The slave station storage means 12 stores a first threshold thw1 serving as a criterion for determining whether or not to issue an evacuation advisory to residents, and a second threshold thw2 serving as a reference value for advising residents to stay in their homes and not evacuate. The second threshold thw2 is a value larger than the first threshold thw1. The first threshold thw1 is, for example, 5 to 10 cm. The second threshold thw2 is, for example, 30 to 40 cm.

[0061] When the slave station control means 13 receives the detection value Sg from the water level sensor 26, it compares the detection value Sg with a first threshold value thw1 or a second threshold value thw2. If the detection value Sg is greater than the first threshold value, the slave station control means 13 causes the loudspeaker 22 to output a voice message advising evacuation and transmits sensor data to the information processing device 3. If the detection value Sg is greater than the second threshold value thw2, the slave station control means 13 causes the loudspeaker 22 to output a voice message advising people to wait inside the building and transmits sensor data to the information processing device 3.

[0062] Next, the operation of the disaster prevention system 1 of the second embodiment will be described. Fig. 16 is a flowchart showing the operation procedure of the loudspeaker according to the second embodiment. The slave station control means 13 receives the detection value Sg from the water level sensor 26 at a predetermined cycle (step S201). The slave station control means 13 compares the received detection value Sg with a second threshold value thw2, and determines whether the detection value Sg is greater than the second threshold value thw2 (step S202).

[0063] If the result of the determination in step S202 is that the detection value Sg is equal to or less than the second threshold thw2, the slave station control means 13 determines whether the detection value Sg is greater than the first threshold thw1 and equal to or less than the second threshold thw2 (step S203). If the result of the determination in step S203 is that the detection value Sg is equal to or less than the first threshold thw1, the slave station control means 13 returns to the process in step S201.

[0064] On the other hand, if the result of the determination in step S203 is that the detection value Sg is greater than the first threshold thw1 and equal to or less than the second threshold thw2, the slave station control means 13 causes the loudspeaker 22 to output a voice message advising evacuation (step S204). Next, the slave station control means 13 transmits sensor data including information on the detection value Sg to the information processing device 3 via the slave station communication means 11 (step S205). After that, the slave station control means 13 returns to the process of step S201.

[0065] If the result of the determination in step S202 is that the detection value Sg is greater than the second threshold value thw2, the slave station control means 13 causes the loudspeaker 22 to output a voice message advising the user not to evacuate but to wait inside the building (step S206). Then, the slave station control means 13 transmits sensor data including information on the detection value Sg to the information processing device 3 via the slave station communication means 11 (step S207).

[0066] In steps S204 and S206, people near the loudspeaker 2c can hear the voice message output from the loudspeaker 22 and decide whether to evacuate or wait at home, so that they can take appropriate action based on the detection value of the sensor. Also, in steps S205 and S207, the information processing device 3 creates a disaster map showing the information of the sensor data received from the loudspeaker 2c and displays it on the display unit 34. A disaster prevention officer at a disaster response center can look at the disaster map displayed on the display unit 34 and predict future changes in water level in the vicinity where the loudspeaker 2 is installed from the change over time in the water level displayed on the disaster map.

[0067] According to the second embodiment, the water level sensor 26 detects the degree of flood damage, and a warning message is automatically broadcast before flood damage occurs based on the detection value of the water level sensor 26, thereby urging residents near the loudspeaker 2 to evacuate quickly. Furthermore, information on the water level detected by the water level sensor 26 of the loudspeaker 2c is transmitted by wireless communication to the information processing device 3 installed at the disaster prevention center, so that it can be used for disaster prevention planning.

[0068] 16, the process of step S202 is performed before the process of step S203, so that the determination of step S202 has a higher priority than the determination of step S203. This makes it possible to announce at an earlier stage to people near the loudspeaker device 2c that they should wait inside the building when the risk of flooding increases.

[0069] Note that Modification 1 may be applied to the present embodiment 2. By providing a water level detection function to each of a plurality of loudspeaker devices 2b installed over a wide area, it is possible to detect the extent of flood damage in real time, issue an alarm, and collect information.

[0070] Moreover, the second embodiment and the first embodiment may be combined. FIG. 17 is a schematic diagram showing an example of a configuration of a loudspeaker system combining the first and second embodiments. The loudspeaker system 2d shown in FIG. 17 is configured to include the submersion sensor 25 described in the first embodiment in the loudspeaker system 2c shown in FIG. 15. For example, even if the amount of rainfall per unit time is small, and the water level in a residential area suddenly exceeds the height of people due to a levee break, the submersion sensor 25 detects the submersion, and a voice message to wait without evacuating is output from the loudspeaker 22. This can prevent residents from going outside the building without knowing that the levee has broken.

[0071] (Variation 2) The disaster prevention system 1 of the above-mentioned first and second embodiments may be applied to a case where a natural disaster is a landslide. There are three types of landslide: steep slope collapse (cliff collapse), debris flow, and landslide. In this modified example 2, a case where the landslide is a landslide and ground abnormality is detected before the landslide occurs will be described.

[0072] A description will be given of the configuration of the loudspeaker in this modified example 2. Fig. 18 is a block diagram showing an example of the configuration of the loudspeaker in the disaster prevention system according to modified example 2. Fig. 19 is a topographical map showing a schematic example of the installation of the loudspeaker shown in Fig. 18 in modified example 2.

[0073] Compared to the configuration shown in FIG. 7, the loudspeaker 2e has a gyro sensor 27 instead of the submersion sensor 25. Before a landslide occurs, there are precursor phenomena such as cracks appearing on the ground surface and trees leaning. In this modified example 2, a pole is installed on the slope to be monitored for a landslide, and the loudspeaker 2e is provided on the pole. The pole on which the loudspeaker 2e is provided does not have to be a utility pole. In the topographical map shown in FIG. 19, a river Rv2 flows between mountains Mt1 and Mt2. FIG. 19 shows a case where the loudspeaker 2e is installed on the eastern slope of mountain Mt2. An area AR1 in which multiple houses are built is shown by a dashed line between the eastern slope of mountain Mt2 and river Rv2.

[0074] The gyro sensor 27 is an example of a sensor that detects a value indicating the occurrence degree of a natural disaster. The gyro sensor 27 detects a value indicating the occurrence degree of a landslide caused by a natural phenomenon such as an earthquake. The gyro sensor 27 detects a change in inclination with respect to a reference direction. The reference direction is, for example, the vertical direction. The threshold value ths stored in the slave station storage means 12 is an angle that is determined in advance as an angle at which there is a high risk of a landslide occurring.

[0075] Next, the operation of the loudspeaker 2e in the present modified example 2 will be described. When an abnormality occurs in the ground, such as a crack occurring on the slope on which the loudspeaker 2e is installed, the pole on which the loudspeaker 2e is installed tilts, and the detection value Sg of the gyro sensor 27 changes. The slave station control means 13 compares the detection value Sg received from the gyro sensor 27 with a threshold value ths. When the detection value Sg is greater than the threshold value ths, the slave station control means 13 causes the loudspeaker 22 to output a voice message advising evacuation, and transmits sensor data to the information processing device 3.

[0076] The above-mentioned operation enables residents of houses in area AR1 in the topographical map shown in Fig. 19 to evacuate before a landslide occurs. In addition, by displaying the information on the sensor data received by the information processing device 3 from the loudspeaker device 2e on the display unit 34, disaster prevention personnel can predict the occurrence of a landslide on the eastern slope of mountain Mt2 and prepare measures in case damage occurs due to a landslide.

[0077] In the present modified example 2, the case where the landslide is a landslide has been described, but the disaster prevention system 1 of the above-mentioned embodiments 1 and 2 may be applied to an area where a landslide may occur and an area where a debris flow may occur according to the definition of a land disaster warning area. It is difficult to predict the occurrence of a landslide and a debris flow using the gyro sensor 27. This is because a landslide is largely influenced by the factor of the angle of the slope, and a debris flow is largely influenced by the precipitation amount due to heavy rain. Therefore, when the detection value Sg of the gyro sensor 27 becomes larger than a predetermined threshold value, a landslide or a debris flow occurs within a short time of several seconds to several minutes. It is dangerous for residents to evacuate after the gyro sensor 27 detects the risk of a landslide.

[0078] Therefore, when the detection value Sg received from the gyro sensor 27 is greater than the threshold value, the slave station control means 13 causes the loudspeaker 22 to output a voice message advising the user to move to as high a position in the building as possible. In this case, when a landslide occurs due to an earthquake, people in a two-story building can evacuate to the second floor more quickly by hearing the voice message output from the loudspeaker 22. Also, at the disaster prevention base, a disaster prevention officer can learn that a landslide has occurred from the information received by the information processing device 3 from the loudspeaker 2a.

[0079] (Variation 3) The disaster prevention system 1 of the above-mentioned first and second embodiments may be applied to cases where the natural disaster is a storm disaster caused by a typhoon, a tornado, or the like. The disaster prevention system 1 of this modification 3 will be described in the case of the loudspeaker 2 shown in FIG. 4. In this modification 3, a wind speed sensor that detects wind speed is provided in the loudspeaker 2 instead of the submersion sensor 25. When the detection value received from the wind speed sensor is greater than a predetermined threshold, the slave station control means 13 causes the loudspeaker 22 to output an audio message advising the user to wait inside the building. In addition, the slave station control means 13 transmits sensor data to the information processing device 3 via the slave station communication means 11.

[0080] According to this modification 3, when strong winds such as tornadoes that are difficult to detect by weather satellites occur locally, people near the area where the strong winds occurred can reduce damage caused by the strong wind by listening to the voice message output from the loudspeaker 22 and waiting inside the building. Furthermore, by displaying on the display unit 34 the information on the sensor data received by the information processing device 3 from the loudspeaker 2e, disaster prevention personnel can know that strong winds have occurred near the loudspeaker 2 and can predict areas where future storm disasters will occur. By applying modification 1 to this modification 3, disaster prevention personnel can predict the path of the tornado by tracking the sensor data received by the information processing device 3 from the multiple loudspeaker devices 2b.

[0081] As examples of the use of the variations, a combination of the first embodiment and the second embodiment and a combination of the second embodiment and the first modification have been described, but the variations are not limited to these use forms. It is possible to select and combine any two or more of the first and second embodiments and the first to third modifications described above. [Explanation of symbols]

[0082] 1. Disaster prevention system 2, 2a~2e public address system 2b-1~2b-4 Public address system 3. Information processing equipment 4. Relay Device 11. Slave station communication means 12 Slave station storage means 13 Slave station control means 14 Power Control Means 15. Storage battery 16 Timer 21 Antenna 22 Public address speaker 23 Main body 24 Control section 25 Submerged Sensor 26 Water level sensor 27 Gyro sensor 31 Antenna 32 Control section 33 Input section 34 Display section 35 Master station communication means 36 Master station storage means 37 Master Station Control Means 41, 41a, 41b Antenna 42 Communication Control Means 43 Power Control Means 44 Storage battery 51 Case 52 Float 53, 54 holes 55 board 60 Solar Cells 70 Detection circuit 71, 72 Terminals 73 Resistance element 74 DC power supply 75 Voltmeter AR1 area BD, BD1, BD2 Building Mt1, Mt2 mountain Rv1, Rv2 River Wa Water

Claims

1. A plurality of public address devices each having a sensor for detecting a value indicating the occurrence degree of a natural disaster, a public address speaker, and a timer for measuring time; an information processing device that receives sensor data including information on the detection values ​​of the sensors from the plurality of loudspeaker devices; The plurality of loudspeakers are a slave station storage means for storing a predetermined voice message and a slave station identifier that is different for each of the plurality of loudspeaker devices and corresponds to the loudspeaker device itself; a slave station communication means for transmitting the sensor data including the slave station identifier to the information processing device; a slave station control means for comparing the detection value with a predetermined threshold value, and when the detection value is greater than the threshold value, outputting the voice message from the loudspeaker, acquiring from the timer a time when it was determined that the detection value was greater than the threshold value, incorporating information on the acquired time into the sensor data, and transmitting the sensor data to the information processing device via the slave station communication means, The information processing device includes: a master station communication means for receiving the sensor data from the plurality of loudspeaker devices; a master station storage means for storing map information in which positions of the plurality of loudspeakers are recorded in correspondence with the slave station identifiers; a master station control means for generating a disaster map showing information on the detection values ​​and information on the time at the positions of the loudspeaker devices by using the sensor data and the map information collected from the plurality of loudspeaker devices; A display unit that displays the disaster map. Disaster prevention system.

2. the sensor is a submersion sensor that detects whether a predetermined position is submerged in water, the slave station storage means stores a danger threshold as the threshold, The slave station control means outputting, through the loudspeaker, the voice message indicating that a flood has occurred, when the detection value received from the submersion sensor is greater than the danger threshold value; The disaster prevention system according to claim 1 .

3. The sensor is a water level sensor that detects a water level, which is a depth of water above ground, the child station storage means stores, as the thresholds, a first threshold and a second threshold that is greater than the first threshold; The slave station control means when the detection value received from the water level sensor is greater than the second threshold, outputting the voice message from the loudspeaker, the voice message instructing the user to wait inside the building, and transmitting the sensor data to the information processing device; when the detection value received from the water level sensor is greater than the first threshold value and equal to or less than the second threshold value, outputting the voice message advising evacuation from the loudspeaker, and transmitting the sensor data to the information processing device; A disaster prevention system according to claim 1 or 2.

4. the sensor is a gyro sensor that detects a change in inclination relative to a reference direction, The slave station control means when the detection value received from the gyro sensor is greater than the threshold value, outputting the voice message advising evacuation from the loudspeaker; The disaster prevention system according to claim 1 .

5. The sensor is a wind speed sensor that detects wind speed, The slave station control means outputting, from the loudspeaker, the voice message advising the user to wait inside a building when the detection value received from the wind speed sensor is greater than the threshold value; The disaster prevention system according to claim 1 .

6. a storage battery for supplying power to the sensor, the slave station communication means, and the slave station control means; A disaster prevention system according to any one of claims 1 to 5.

7. The information processing device further includes a relay device that, when receiving the sensor data from at least one of the plurality of loudspeakers, transfers the received sensor data to the information processing device. A disaster prevention system according to any one of claims 1 to 6.

8. The plurality of loudspeaker devices transmit the sensor data to the information processing device with a time lag between the plurality of loudspeaker devices. A disaster prevention system according to any one of claims 1 to 7.

9. A disaster prevention method using a disaster prevention system having a plurality of loudspeakers and an information processing device, wherein the plurality of loudspeakers have a sensor for detecting a value indicating the occurrence degree of a natural disaster, a sub-station storage means for storing a predetermined voice message and a sub-station identifier that is different for each of the plurality of loudspeakers and corresponds to the device itself, a loudspeaker for outputting the voice message, a timer for measuring time, and sub-station communication means for transmitting sensor data including the sub-station identifier and information of the detection value detected by the sensor to the information processing device, wherein the information processing device has a master station communication means for receiving the sensor data from the plurality of loudspeakers, a master station storage means for storing map information in which positions are recorded corresponding to the sub-station identifier for each of the plurality of loudspeakers, and a display unit, the plurality of loudspeakers comparing the detected value with a predetermined threshold; when the detection value is greater than the threshold value, the plurality of loudspeaker devices output the voice message to the loudspeaker, obtain from the timer the time when it was determined that the detection value was greater than the threshold value, include information on the obtained time in the sensor data, and transmit the sensor data to the information processing device via the slave station communication means; a step of generating a disaster map showing information on the detection values ​​and information on the time at the positions of the loudspeakers by the information processing device using the sensor data collected from the plurality of loudspeakers and the map information; A step of causing the information processing device to display the disaster map on the display unit; A disaster prevention method having the above.

Images