Disaster estimation device

Abstract

This invention provides a disaster estimation device that can estimate the occurrence of flooding and earthquakes without combining multiple sensors, thereby reducing costs. [Solution] The disaster estimation device 1 is attached to a house H and includes a rise detection unit 10 that detects the rise of a movable float 21 and outputs a rise detection signal. The rise detection unit 10 includes a float 21 that rises due to flooding and earthquakes occurring around the house H, a spring 25 that biases the float 21, and a rise detection sensor 20 that detects the rise of the float 21 and outputs a rise detection signal.

Description

Technical Field

[0001] The present invention relates to a disaster estimation device, and particularly to a disaster estimation device for estimating the occurrence of flooding and earthquakes.

Background Art

[0002] In recent years, an increase in abnormal weather due to the influence of human economic activities and the like has been pointed out. Therefore, the awareness of the crisis against natural disasters has been enhanced, and in particular, the importance of disaster prevention measures against floods and earthquakes that occur over a wide area has been increasing. Along with this, the construction of a disaster monitoring system for quickly grasping the occurrence situation of disasters has been proposed.

[0003] Patent Document 1 describes a flood occurrence warning system including a plurality of water level sensors attached to the outer wall of a house, an alarm device, and system control means. Specifically, when flooding occurs due to heavy rain or a river flood, the occurrence of flooding is detected by a plurality of water level sensors attached to a predetermined height of the house, and a flood occurrence signal is output. Further, Patent Document 2 describes a seismic tsunami detection device including a float switch and a vibration meter. Specifically, when the float switch detects flooding within a predetermined time after the vibration meter detects an earthquake with a seismic intensity of 5 or more, it is estimated that a tsunami has struck and an alarm signal is output.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The technologies disclosed in Patent Documents 1 and 2 allow for the understanding of the occurrence of disasters such as flooding, earthquakes, and tsunamis. However, these technologies require the use of multiple sensors in combination, and expensive acceleration sensors were employed as vibration meters for detecting earthquakes, thus creating a need for cost reduction.

[0006] The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to provide a disaster estimation device that can estimate the occurrence of flooding and earthquakes without combining multiple sensors, and can achieve cost reduction. [Means for solving the problem]

[0007] The aforementioned problems are solved by the disaster estimation device of the present invention, which includes a rising detection unit that is attached to a building and detects the rising of a floating body that can be raised and lowered and outputs a rising detection signal, wherein the rising detection unit includes the floating body that rises due to flooding and earthquakes occurring around the building, an elastic member that biases the floating body, and a rising detection sensor that detects the rising of the floating body and outputs the rising detection signal.

[0008] According to the above configuration, the disaster estimation device includes a floating body that rises due to flooding and earthquakes, an elastic member that biases the floating body after an earthquake occurs, and a rise detection unit that detects the rise of the floating body and outputs a rise detection signal. Therefore, when flooding occurs, the floating body rises, and the rise detection unit continuously outputs a rise detection signal. On the other hand, when an earthquake occurs, the floating body vibrates due to the shaking, and the rise detection unit intermittently and repeatedly outputs a rise detection signal. This makes it possible to estimate the occurrence of flooding and earthquakes without combining multiple sensors, thereby reducing costs.

[0009] Furthermore, the elastic member may be used to repeatedly raise and lower the floating body that has risen due to the earthquake by biasing it. With the above configuration, the elastic energy generated by the elastic member causes the floating body to repeatedly rise and fall, resulting in the intermittent and repeated output of an upward detection signal, which improves the accuracy of earthquake occurrence estimation.

[0010] Furthermore, the disaster estimation device may include a disaster estimation unit that is in communication with the rise detection unit, and the disaster estimation unit may have a signal acquisition unit that acquires the rise detection signal, a flood determination unit that estimates the flooding status of the building based on the rise detection signal, an earthquake determination unit that estimates the earthquake situation in the area where the building was constructed based on the rise detection signal, and a disaster estimation result output unit that outputs the determination result of the flood determination unit and the determination result of the earthquake determination unit. With the above configuration, the flooding situation and earthquake situation can be estimated by the disaster estimation unit, which is connected to the rising water detection unit. This makes it possible to reduce costs compared to determining the occurrence of flooding and earthquakes with separate devices.

[0011] Furthermore, the flooding determination unit, when it continuously acquires the rising detection signal, compares the duration of the rising detection signal with a predetermined first threshold and determines the flooding status of the building based on the comparison result. The earthquake determination unit, when it intermittently acquires the rising detection signal repeatedly, compares the repetition time of the rising detection signal with a predetermined second threshold and determines the earthquake damage status of the area based on the comparison result. According to the above configuration, it becomes possible to estimate the flooding situation and earthquake damage around a building with high accuracy.

[0012] Furthermore, the upward detection unit is a float switch having a lower stopper that supports the float from below, and the elastic member is interposed between the lower stopper and the float, biasing the float upward. With the above configuration, by interposing an elastic member between the readily available float switch's lower stopper and the floating body, it is possible to estimate the occurrence of flooding and earthquakes, and thus easily achieve cost reduction.

[0013] Further, the elastic member may be located above the floating body and suspend and support the floating body from above. According to the above configuration, it is possible to suppress the elastic member from deteriorating due to immersion in water and the estimation accuracy of earthquake occurrence from decreasing.

Advantages of the Invention

[0014] According to the present invention, it is possible to provide a disaster estimation device that can estimate the occurrence of flooding and earthquakes without combining a plurality of sensors, and can achieve cost reduction.

Brief Description of the Drawings

[0015] [Figure 1] It is a perspective view of a house equipped with a rising detection unit according to an embodiment of the present invention. [Figure 2] It is a schematic diagram for explaining the operation of the rising detection unit when flooding occurs. [Figure 3] It is a schematic diagram for explaining the operation of the rising detection unit when an earthquake occurs. [Figure 4] It is a diagram showing the functional configuration of the disaster estimation device. [Figure 5] It is a diagram showing the change of the rising detection signal when flooding occurs. [Figure 6] It is a diagram showing the change of the rising detection signal when an earthquake occurs. [Figure 7] It is a diagram showing the flow of the disaster estimation process.

Embodiments for Carrying Out the Invention

[0016] Hereinafter, a disaster estimation device 1 according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS. 1 to 7. However, the embodiment described below is merely an example for facilitating understanding of the present invention and does not limit the present invention. That is, the present invention can be changed and improved without departing from its gist, and it is a matter of course that equivalents thereof are included in the present invention.

[0017] The disaster estimation device 1 of the present invention is attached to a building such as a house and is used to monitor the occurrence of flooding and earthquakes. Further, the disaster estimation device 1 of the present invention is used to monitor the occurrence of flooding and earthquakes at low cost without combining a plurality of sensors. In the following description, flooding means that a building such as a house is flooded, and unless otherwise specified, it includes under-floor flooding and above-floor flooding. Also, an earthquake disaster means a disaster caused by an earthquake, and means the occurrence of a major earthquake (for example, an earthquake with a seismic intensity of 5 or more) that causes strong shaking.

[0018] <<Overview of the disaster estimation device 1>> FIG. 1 shows an installation example of the rise detection unit 10 for the house H. As shown in FIG. 1, the rise detection unit 10 can be installed on the outer wall or foundation of the house H. As will be described later, when flooding and an earthquake occur, the rise detection unit 10 detects the rise (floating and vibration) of the float 21 (floating body) and outputs a rise detection signal to the disaster estimation processor 30 (see FIG. 4). Therefore, by installing the rise detection unit 10 at a position higher than the floor of the house H, above-floor flooding can be monitored, and by installing it at a position lower than the floor, under-floor flooding can be monitored. Also, by installing the rise detection unit 10 in the house H, the occurrence of a major earthquake that causes strong shaking in the house H can be monitored.

[0019] The disaster estimation processor 30 is communicatively connected to the rise detection unit 10 to acquire a rise detection signal, estimate the situation of flooding and earthquake disasters, and output an estimation result. The disaster estimation processor 30 may output the estimation results of flooding and earthquake disasters to a disaster monitoring server (not shown) that remotely monitors the disaster situation centrally via a telecommunication line such as the Internet. The disaster monitoring server can play a role in centrally monitoring the situation of the disaster-affected area by collecting the disaster estimation results from the disaster estimation devices 1 installed in buildings (houses, commercial facilities, factories, etc.) in the neighboring area.

[0020] In Figure 1, the rising detection unit 10 is installed in a house H, but the installation location is not limited to a house H. The rising detection unit 10 can be installed in any location suitable for disaster monitoring, and may be installed in apartment buildings, factories, commercial facilities, or on embankments. House H corresponds to a building.

[0021] <<Upward detection unit 10>> Next, the rise detection unit 10 will be described. Figure 2 is a diagram illustrating the operation of the rise detection unit 10 when flooding occurs. Figure 3 is a diagram illustrating the operation of the rise detection unit 10 when an earthquake occurs. As shown in Figures 2 and 3, the rise detection unit 10 has a case body 11 and a float switch 20 housed and held in the case body 11.

[0022] The case body 11 houses the float switch 20 and prevents foreign matter from entering the float switch 20. The case body 11 is a hollow body having an upper surface 12, a bottom surface 13 facing the upper surface 12, and side surfaces 14. The bottom surface 13 has a plurality of openings 13a that allow water to pass through while preventing foreign matter from entering the inside of the case body 11. However, it is not limited to this, and the bottom surface 13 may be covered with a filter material that allows water to pass through. The case body 11 is fixed to the exterior wall or foundation of the house H via fixing brackets (not shown).

[0023] The float switch 20 detects the rise of the float 21 due to the rise in the water level S around the house H, or the vertical vibration of the float 21 due to a large tremor caused by an earthquake, and outputs a rising detection signal. The float switch 20 mainly consists of a float 21, a lifting shaft 22, a lower stopper 23, an upper stopper 24, a spring 25, and an output cable 26.

[0024] Float 21 is a floating component (floating body) that rises due to the buoyancy of water. Float 21 is a molded foamed resin, but is not limited to this. Float 21 may be made of cork or wood. Float 21 may also be a hollow molded body filled with a gas such as helium. The float 21 has an annular shape in plan view and has an inner circumferential surface and an outer circumferential surface. In other words, the float 21 has a through hole through which the lifting shaft 22 passes in the vertical direction. Therefore, the float 21 can slide up and down relative to the lifting shaft 22.

[0025] A permanent magnet is built into the float 21. When the float 21 rises, the permanent magnet activates a reed switch built into the lifting shaft 22. As a result, the float switch 20 emits a rise detection signal. The permanent magnet is a ferrite magnet, but is not limited to this. The permanent magnet only needs to be able to activate the reed switch when the float 21 rises, and may be a neodymium magnet or a samarium-cobalt magnet.

[0026] The lifting shaft 22 is a long shaft that extends vertically and passes through the center of the float 21. A lower stopper 23 is provided at the lower end of the lifting shaft 22, and an upper stopper 24 is provided at the upper end. The lower stopper 23 supports the float 21 from below when the float 21 is lowered. On the other hand, the upper stopper 24 restricts the upper limit position of the float 21 when the float 21 is raised. The lifting shaft 22 has a threaded end and is fixed to the case body 11 by screwing it into the fastening member 22a. In other words, the lifting shaft 22 is fixed to the exterior wall or foundation of the house H via the case body 11.

[0027] A reed switch (not shown) is built into the lifting shaft 22 to detect the rise of the float 21 and output a rise detection signal. The reed switch consists of a glass tube and a pair of ferromagnetic lead pieces sealed inside the glass tube. Therefore, when the float 21 rises, the magnetic force of the permanent magnet brings the tips of the pair of lead pieces together, and a rise detection signal is output via the output cable 26. An inert gas such as nitrogen is sealed inside the glass tube. The inert gas suppresses the deterioration of the lead pieces over time. The reed switch corresponds to a rise detection sensor.

[0028] The spring 25 is interposed between the float 21 and the lower stopper 23, and can bias the float 21 upward and downward. Furthermore, when the float 21 is displaced, the spring 25 can generate elastic energy corresponding to the amount of displacement. Therefore, by selecting a spring 25 with an appropriate spring constant, the float 21 can be repeatedly raised and lowered by the combined force of earthquake tremors and the elastic energy of the spring 25. This allows for the intermittent output of upward detection signals over a long period, thereby improving the accuracy of earthquake occurrence estimation.

[0029] The output cable 26 outputs the upward detection signal, which is output by the reed switch built into the lifting shaft 22, to the disaster estimation processor 30 (see Figure 4) installed in the house H. As will be described later, the upward detection signal is used by the disaster estimation processor 30 to estimate the occurrence of flooding and earthquakes.

[0030] Next, the operation of the rise detection unit 10 will be explained. Figure 2 shows the operation of the rise detection unit 10 when flooding occurs. As shown in Figure 2, when flooding occurs, the float 21 rises due to buoyancy. Since the buoyancy is greater than the elastic force of the spring 25, the float 21 remains in the raised state. As a result, the rise detection unit 10 continuously outputs a rise detection signal.

[0031] Figure 3 shows the operation of the upward detection unit 10 during an earthquake. As shown in Figure 3, when an earthquake occurs, the float 21 vibrates due to the large shaking caused by the earthquake. When the float 21 is displaced vertically, elastic energy is generated in the spring 25. Specifically, if the amount of displacement of the float 21 is X, elastic energy equivalent to E = (X^2) / 2 is generated in the spring 25. Therefore, the float 21 repeatedly performs intermittent vertical movement due to the shaking caused by the earthquake and the elastic energy of the spring 25. As a result, the upward detection unit 10 repeatedly outputs an upward detection signal.

[0032] <<Disaster Estimation Processing Unit 30>> Next, the disaster estimation processor 30 will be described. The disaster estimation processor 30 is connected to the reed switches of one or more rise detection units 10 via output cables 26 and can acquire rise detection signals output by the float switches 20. The disaster estimation processor 30 is installed in a location inside the house H where there is no risk of flooding.

[0033] The disaster estimation processor 30 includes a processor, a control circuit having a non-volatile memory in which a program executed by the processor is stored, and a volatile memory. The disaster estimation processor 30 loads and executes the disaster estimation processing program stored in the non-volatile memory, thereby performing the disaster estimation processing described later with reference to Figure 7.

[0034] Figure 4 shows the functional configuration of the disaster estimation device 1. The disaster estimation processor 30 mainly consists of a disaster estimation unit 31 and a communication unit 35. The disaster estimation unit 31 includes a signal acquisition unit 32, a flood detection unit 33, and an earthquake detection unit 34, and estimates the disaster situation around the house H based on the rising detection signal output by the float switch 20.

[0035] The signal acquisition unit 32 acquires the rise detection signal output by the float switch 20. The signal acquisition unit 32 is an interface circuit connected to the float switch 20. The signal acquisition unit 32 may also have an amplification circuit for amplifying the signal, an ADC circuit for converting the analog signal to a digital signal, and a filter circuit for removing noise components.

[0036] The flood detection unit 33 determines the flooding status of the house H based on the rising detection signal acquired by the signal acquisition unit 32. More specifically, when the flood detection unit 33 continuously acquires a rising detection signal, it compares the duration with a predetermined first threshold and determines the flooding status based on the comparison result. The flood detection unit 33 determines that flooding has occurred in the house H if it determines that the duration of the rising detection signal has continued for longer than or equal to the first threshold, or if it determines that the duration is longer than the first threshold. The first threshold is, for example, 5 seconds, but is not limited to this. The first threshold may be 3 seconds, or 10 seconds or more.

[0037] Figure 5 is an explanatory diagram of the rise detection signal output by the rise detection unit 10 when flooding occurs around house H. As described above, when flooding occurs around house H and the water level S rises, the float switch 20 detects the rise of the float 21 and outputs a rise detection signal. The rise detection signal is output continuously until the water level around house H decreases. Therefore, the flooding determination unit 33 estimates that flooding has occurred around house H when it continuously acquires the rise detection signal above a first threshold.

[0038] The earthquake determination unit 34 determines the earthquake damage status of house H based on the rising detection signal acquired by the signal acquisition unit 32. More specifically, when the rising detection signal is acquired intermittently and repeatedly, the earthquake determination unit 34 compares the repetition time with a second threshold and determines the earthquake damage status based on the comparison result. The earthquake determination unit 34 determines that an earthquake has occurred if it determines that the repetition time of the rising detection signal is equal to or greater than the second threshold, or if it determines that it is longer than the second threshold. The first threshold is, for example, 4 seconds, but is not limited to this. The second threshold may be 2 seconds or 5 seconds or more.

[0039] Figure 6 is an explanatory diagram of the rise detection signal output by the rise detection unit 10 when an earthquake occurs in the area where house H is built. As shown in Figure 6, when an earthquake occurs in the area where house H is built, the float 21 repeatedly rises and falls due to the shaking caused by the earthquake and the elastic energy of the spring 25 provided in the float switch 20. Then, the float switch 20 intermittently outputs a rise detection signal indicating that the float 21 is rising. Specifically, the rise detection signal changes to repeatedly switch between "on" and "off" in a short period of time. Such a change in the signal is generally called chattering. Furthermore, chattering is repeated until the elastic energy of the spring 25 is lost. Therefore, as described above, the earthquake determination unit 34 determines that an earthquake has occurred in the area where house H is built if the repetition time of the rise detection signal indicating that the float 21 is rising (the time difference between the timing Ts when chattering starts and the timing Te when chattering ends) continues for more than a second threshold.

[0040] The communication unit 35 is a communication circuit that outputs the judgment results of the flood judgment unit 33 and the judgment results of the earthquake judgment unit 34. The communication unit 35 can output the estimation results to an external information processing device via wired communication or wireless communication available to the public. The information processing device may be a disaster monitoring server that monitors the disaster situation in the area where the house H is built. The communication unit 35 corresponds to the disaster estimation result output unit of the present invention.

[0041] <<Disaster Estimation Processing>> Next, we will explain the flow of disaster estimation processing. Figure 7 shows the disaster estimation process performed by the processor of the disaster estimation processor 30. As shown in Figure 7, first, the disaster estimation processor 30 determines whether or not it has acquired an upward detection signal indicating that the float 21 has risen (step S10). If it is determined that an upward detection signal has not been acquired (step S10: No), the disaster estimation processor 30 waits until it acquires an upward detection signal.

[0042] On the other hand, if it is determined that an upward detection signal indicating that the float 21 has risen has been obtained (step S10: Yes), the disaster estimation processor 30 determines whether or not the upward detection signal is continuing (step S11). Specifically, the disaster estimation processor 30 determines whether or not the upward detection signal is continuing by comparing the duration of the upward detection signal with a first threshold (e.g., 5 seconds).

[0043] If it is not determined that the upward detection signal continues for longer than the first threshold (step S11: No), the disaster estimation processor 30 determines whether or not chattering is continuing (step S12). Specifically, when the disaster estimation processor 30 repeatedly receives intermittent upward detection signals, it determines whether or not chattering is continuing by comparing the repetition time with a second threshold (e.g., 4 seconds).

[0044] If the rising detection signal is determined to be chattering above the second threshold (step S12: Yes), the disaster estimation processor 30 estimates that an earthquake has occurred and outputs an earthquake warning to alert of the earthquake (step S13). Specifically, the disaster estimation processor 30 outputs an earthquake warning signal to an external information processing device via a communication line such as the Internet.

[0045] On the other hand, if it is determined in step S11 that the rising detection signal continues to be above the first threshold (step S11: Yes), the disaster estimation processor 30 estimates that flooding has occurred and outputs a flood warning to alert of the occurrence of flooding (step S14). Specifically, the disaster estimation processor 30 outputs a flood warning signal to an external information processing device via a communication line.

[0046] As described above, the disaster estimation device 1 is equipped with an upward detection unit 10 and a disaster estimation processor 30, and can detect the occurrence of flooding and earthquakes using only the float switch 20 without combining multiple sensors. Therefore, it is possible to reduce costs compared to detecting the occurrence of flooding and earthquakes by combining multiple sensors. Furthermore, the disaster estimation processor 30 can estimate the flooding situation and earthquake situation based on the rising detection signal output by the rising detection unit 10. Therefore, the configuration of the device can be simplified, and it becomes possible to estimate the occurrence of flooding and earthquakes at low cost.

[0047] The disaster estimation device 1 according to this embodiment has been described above. The above-described embodiment is merely an example to facilitate understanding of the present invention and does not limit the present invention. That is, the present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included in the present invention.

[0048] <<Variation>> In the embodiments described above, a spring 25 is interposed between the float 21 and the lower stopper 23, and the spring 25 biases the float 21 up and down; however, the invention is not limited to this. The float switch 20 may be located above the float 21 and may have a rubber cord that suspends and supports the float 21. More specifically, the float switch 20 has a long rubber cord, one end of which is connected to the upper stopper 24 and the other end of which is connected to the float 21. There may be one or two rubber cords. The rubber cord corresponds to the elastic member of the present invention.

[0049] The rubber cord is interposed between the float 21 and the upper stopper 24, and can bias the float 21 in the vertical direction. More specifically, when the float 21 is displaced by the large shaking caused by the earthquake, the rubber cord generates elastic energy corresponding to the amount of displacement. Therefore, the float 21 moves up and down, vibrating vertically due to the shaking caused by the earthquake and the elastic energy of the rubber cord.

[0050] This makes it possible to estimate the occurrence of flooding and earthquakes without combining multiple sensors, similar to the embodiment described above, thereby reducing costs. Furthermore, by positioning the rubber cord above the float 21, it becomes possible to suppress the deterioration of the rubber cord due to flooding, which would reduce the accuracy of earthquake prediction.

[0051] Furthermore, although the above-described embodiment was explained as having a spring 25 interposed between the float 21 and the lower stopper 23, the invention is not limited to this. The float switch 20 may have a spacer that generates a repulsive force between the float 21 and the lower stopper 23. For example, a leaf spring may be interposed between the float 21 and the lower stopper 23. The leaf spring corresponds to the elastic member of the present invention. Even in such a case, the same effects as in the above-described embodiment can be achieved.

[0052] Furthermore, although the flood detection unit 33 and the earthquake detection unit 34 were described in the above-described embodiment as determining the occurrence of flooding and earthquakes, they are not limited to this. The flood detection unit 33 may determine the scale of flooding or the extent of damage based on the duration when the rising detection signal is continuous. Similarly, the earthquake detection unit 34 may determine the scale of an earthquake or the extent of damage based on the repetition time when the rising detection signal is intermittently repeated.

[0053] Furthermore, in the embodiments described above, the disaster estimation processor 30 was described as outputting the judgment results of the flood judgment unit 33 and the earthquake judgment unit 34 via the communication unit 35, but it is not limited to this. Of course, the disaster estimation processor 30 may also output the flood and disaster estimation results to an external display device. [Explanation of Symbols]

[0054] 1 Disaster estimation device 10. Elevation detection unit 11 Case Body 12 Top side 13. Base 13a aperture 14 Side 20 Float switch 21 Floats 22 Lifting shaft 22a Fastening member 23 Lower stopper 24 Upper stopper 25. Spring (elastic component) 26 Output Cables 30. Disaster Estimation Processing Unit 31 Disaster Estimation Unit 32 Signal acquisition unit 33 Flood detection section 34 Earthquake Judgment Department 35. Communication Unit (Disaster Estimation Result Output Unit) H Housing S water surface

Claims

1. A disaster estimation device equipped with an upward detection unit that is attached to a building and detects the upward movement of a liftable floating body and outputs an upward detection signal, The aforementioned rise detection unit is The floating body rises due to flooding and earthquakes that occur around the aforementioned building, An elastic member that biases the float, A disaster estimation device characterized by having an upward detection sensor that detects the upward movement of the floating body and outputs an upward movement detection signal.

2. The disaster estimation device according to claim 1, characterized in that the elastic member biases the floating body, which has risen due to the earthquake, to repeatedly raise and lower it.

3. The disaster estimation device comprises a disaster estimation unit that is in communication with the rise detection unit, The aforementioned disaster estimation unit is A signal acquisition unit that acquires the aforementioned rise detection signal, A flood determination unit that estimates the flooding status of the building based on the rising detection signal, An earthquake determination unit that estimates the earthquake damage situation in the area where the building was constructed based on the rising detection signal, The disaster estimation device according to claim 1, further comprising a disaster estimation result output unit that outputs the determination result of the flood determination unit and the determination result of the earthquake determination unit.

4. When the flood detection unit continuously acquires the rising detection signal, it compares the duration of the rising detection signal with a predetermined first threshold and determines the flooding status of the building based on the comparison result. The disaster estimation device according to claim 3, characterized in that when the earthquake determination unit intermittently and repeatedly acquires the rising detection signal, it compares the repetition time of the rising detection signal with a predetermined second threshold and determines the earthquake disaster situation in the area based on the comparison result.

5. The rising detection unit is a float switch having a lower stopper that supports the floating body from below, The disaster estimation device according to claim 1, characterized in that the elastic member is interposed between the lower stopper and the floating body and biases the floating body upward.

6. The disaster estimation device according to claim 1, characterized in that the elastic member is located above the floating body and suspends and supports the floating body from above.

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