JP2019148515A - Earthquake detection system - Google Patents

Abstract

To provide an earthquake detection system that can provide information for acquiring a precise earthquake motion evaluation.SOLUTION: Provided is an earthquake detection system comprising plural vibration meters and a server. The vibration meter includes: a sensor which is mounted to a columnar structure placed on the ground, and detects earthquake vibration at the columnar structure; a vibration meter processing part which derives a parameter representing earthquake vibration on a ground surface, on the basis of the earthquake vibration at the columnar structure detected by the sensor; and a vibration meter communication part which transmits earthquake information containing the parameter derived by the vibration meter processing part to the server. The server includes: a server communication part which receives the earthquake information transmitted by each of the plural vibration meters; and a server creation part which creates an earthquake motion distribution, on the basis of the parameter contained in each of the plural earthquake information pieces received by the server communication part, and positional information obtained by the parameter.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to an earthquake detection system.

There are known earthquake alarm systems such as strong earthquake observation networks (K-NET, KiK-net), high-sensitivity earthquake observation networks (High-Sensitivity Seismograph Network Japan, abbreviated as Hi-net), earthquake early warning, and SUPREME.
The strong motion observation network consists of K-NET (Kyoshin Net) installed on the surface of the earth at approximately 1,000 locations nationwide and KiK-net (Kiban-Kyoshin Net) installed on the surface and underground. : Base strong motion observation network). The strong motion observation network is one of the seismic observation networks maintained and operated by the National Research Institute for Earth Science and Disaster Prevention. The measurement data is saturated even in strong motions to reliably record strong motions that cause damage called strong motions. It is an observation network using a difficult "wide dynamic range acceleration type digital strong motion meter".
The high-sensitivity seismic network is installed by a high-sensitivity seismometer that operates 24 hours a day and is capable of detecting faint shakes that are installed at intervals of approximately 20 km to understand the characteristics of earthquakes in various parts of Japan. It is an observation network. The high-sensitivity seismic observation network was established by the National Research Institute for Earth Science and Disaster Prevention in 1995, and observation was started in 1996.
The Earthquake Early Warning is one of the early earthquake warning systems designed to issue warnings several seconds to several tens of seconds before the occurrence of a large shake after the earthquake occurs. It is an alarm.
In SUPREME, seismometers called SI sensors are installed in approximately 4000 governors that supply low-pressure gas. When an earthquake that damages conduits or structures is detected, the gas supply is automatically shut off. SUPREME is equipped with one ultra-high-density SI sensor about 1km square. SUPREME is provided by Tokyo Gas.
In addition, the Japan Meteorological Agency acquires seismic intensity information observed by a seismometer installed at the observation point, and based on the acquired seismic intensity information, announces seismic intensity information including seismic intensity observation results immediately after the occurrence of the earthquake.
The surface ground model created by the national and local governments for earthquake disaster prevention is the most detailed and has a 250 m grid. In addition, the shaking information provided by the national and local governments is information obtained by modeling and analyzing the ground.

  Regarding a technology for distributing information on earthquakes, a technology is known that can prevent an unrelated third party from intervening and prevent intrusion of unauthorized information and wiretapping and tampering of emergency earthquake bulletins (see, for example, Patent Document 1). . In this technology, at the earthquake information distribution center that continuously receives earthquake data from the earthquake information transmission center, a reception confirmation signal with encryption information is transmitted to the earthquake early warning control device at the distribution destination on a regular basis, and the earthquake data is received. Occasionally, calculation and analysis of the predicted seismic intensity of the delivery destination, main motion arrival time, etc., and if the predicted seismic intensity at the delivery destination is greater than a predetermined scale, the earthquake early warning signal with encryption information is controlled via the Internet line. The earthquake early warning control device sends the information to the device, and the encryption information of the received earthquake early warning signal is checked against the stored encryption information, and if the encryption matches, various warning signals including voice signals or contact signals are reported to the individual delivery destination. To do.

JP 2010-140395 A

In order to provide disaster prevention information in detail, use it for risk management, or use it for seismic design, precise seismic motion evaluation is required. However, with the above-described technology, precise seismic motion evaluation is difficult due to the reason that the interval between sensors is rough.
The present invention has been made in view of the above-described points, and an object of the present invention is to provide an earthquake detection system that can provide information for obtaining a precise seismic motion evaluation.

One aspect of the present invention is an earthquake detection system including a plurality of vibrometers and a server, wherein the vibrometer is attached to a columnar structure installed on the ground and detects an earthquake shake in the columnar structure. And a vibration meter processing unit for deriving a parameter representing the earthquake vibration of the ground surface based on the earthquake vibration in the columnar structure detected by the sensor, and the parameter derived by the vibration meter processing unit A vibration meter communication unit that transmits earthquake information including a server to the server, the server includes a server communication unit that receives the earthquake information transmitted by each of the plurality of vibration meters, and a plurality of the server communication unit that has received the An earthquake comprising a server processing unit that creates a seismic motion distribution based on the parameters included in each of the earthquake information and the position information from which the parameters were obtained. It is a knowledge system.
In the earthquake detection system of one aspect of the present invention, the columnar structure is any one of power equipment, a power pole, a streetlight, and a pole.
In the earthquake detection system of one aspect of the present invention, the vibrometer processing unit derives the earthquake vibration at the ground surface based on the earthquake vibration at the columnar structure, and the derived earthquake vibration at the ground surface, Convert to the parameter.
In the earthquake detection system of one aspect of the present invention, based on the response characteristics of the columnar structure, the columnar structure derives an earthquake vibration on the ground surface from the earthquake vibration.
In the earthquake detection system of one aspect of the present invention, the vibrometer includes an imaging device attached to the columnar structure, and the vibrometer communication unit receives earthquake information including image information obtained by imaging by the imaging device. The processing unit creates damage degree information based on the image information included in the earthquake information transmitted by each of the plurality of vibrometers.
In the earthquake detection system of one embodiment of the present invention, the vibrometer includes a time acquisition unit attached to the columnar structure, and the vibrometer communication unit transmits earthquake information including the time information acquired by the time acquisition unit to the server. Then, the processing unit creates a seismic motion distribution based on the time information included in the earthquake information transmitted by each of the plurality of vibrometers.
In the seismic detection system of one embodiment of the present invention, the vibration meter includes a vibration meter communication unit that transmits earthquake information including vibration meter identification information to a server, and the server transmits the vibration meter identification information and the vibration meter identification information. A storage unit that associates and stores position information, and the processing unit stores position information associated with the vibration meter identification information included in the earthquake information transmitted by each of the plurality of vibration meters in the storage unit. The seismic motion distribution is created based on the obtained plurality of position information.

  According to the embodiment of the present invention, it is possible to provide an earthquake detection system that can provide information for obtaining an accurate seismic motion evaluation.

It is a figure which shows an example of the earthquake detection system which concerns on 1st Embodiment. It is a block diagram which shows the vibrometer, the relay apparatus, and server which are contained in the earthquake detection system which concerns on 1st Embodiment. It is a figure which shows an example of the process which the vibrometer which concerns on 1st Embodiment performs. It is a figure which shows an example of a position information table. It is a sequence chart which shows an example of operation | movement of the earthquake detection system which concerns on 1st Embodiment. It is a figure which shows an example of the earthquake detection system which concerns on 2nd Embodiment. It is a block diagram which shows the seismometer, relay apparatus, and server which are included in the earthquake detection system which concerns on 2nd Embodiment. It is a sequence chart which shows an example of operation | movement of the earthquake detection system which concerns on 2nd Embodiment.

Next, the earthquake detection system of this embodiment is demonstrated, referring drawings. Embodiment described below is only an example and embodiment to which this invention is applied is not restricted to the following embodiment.
Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description will be omitted.
Further, “based on XX” in the present application means “based on at least XX”, and includes a case based on another element in addition to XX. Further, “based on XX” is not limited to the case where XX is directly used, but also includes the case where it is based on an operation or processing performed on XX. “XX” is an arbitrary element (for example, arbitrary information).

(First embodiment)
(Earthquake detection system)
FIG. 1 is a diagram illustrating an example of an earthquake detection system according to the first embodiment. The earthquake detection system 10 according to the first embodiment creates notification information such as earthquake motion distribution and disaster information based on earthquake information acquired by each of a plurality of vibrometers. The seismic motion distribution is a surface distribution of the strength of ground shaking in an earthquake. Hereinafter, as an example of the notification information, the description will be continued for a case where a seismic motion distribution is created.
The earthquake detection system 10 includes a vibrometer 100-1, a vibrometer 100-2, ..., a vibrometer 100-N (N is an integer of N> 0), a relay device 200, and a server 300. Prepare. Vibrometer 100-1, Vibrometer 100-2,..., Vibrometer 100-N are each attached to a columnar structure installed on the ground, such as power equipment, distribution line utility poles, street lamps, and poles. FIG. 1 shows a power distribution pole (hereinafter referred to as “electric pole”) 1-1, a power pole 1-2,..., And a power pole 1-N as an example of a columnar structure. The utility pole 1-1, the utility pole 1-2,..., The utility pole 1-N are arranged in a predetermined area such as a town at a predetermined interval such as 30m-50m, and the distribution line 2-1 and the distribution line 2- 2 is supported.

Vibrometer 100-1 is attached by a fixing member such as a brace at a height of 5.0 m-5.3 m from the ground surface of utility pole 1-1 in accordance with current rules. The vibrometer 100-2 is attached by a fixing member such as a brace at a height of 5.0m-5.3m from the ground surface of the utility pole 1-2 in accordance with current rules. Vibrometer 100-N is attached by a fixing member, such as a brace, at a height of 5.0 m-5.3 m from the ground surface of utility pole 1-N according to current rules. The position where the vibrometer 100-1, the vibrometer 100-2, and the vibrometer 100-N are attached is not limited to a position having a height of 5.0 m to 5.3 m from the ground surface, and may be arbitrary. Hereinafter, as an example, a case where the position where the vibrometer 100-1, the vibrometer 100-2, and the vibrometer 100-N are attached is a position having a height of 5.0 m to 5.3 m from the ground surface. Continue the explanation.
The relay device 200 can communicate with each of the vibrometer 100-1, the vibrometer 100-2, ..., and the vibrometer 100-N. Although one relay device 200 is shown in FIG. 1, the relay device 200 is installed for each predetermined area such as a town. The relay device 200 and the server 300 are connected via a network 50 such as the Internet. The server 300 can communicate with the relay device 200.
Hereinafter, among the vibrometer 100-1, the vibrometer 100-2, ..., the vibrometer 100-N, an arbitrary vibrometer is referred to as a vibrometer 100. Moreover, an arbitrary utility pole is described as the utility pole 1 among the utility pole 1-1, the utility pole 1-2, ..., and the utility pole 1-N.

The vibrometer 100 periodically acquires earthquake shaking such as acceleration, speed, and displacement. Here, since the vibration meter 100 is mounted at a height of 5.0 m-5.3 m from the ground surface, the earthquake shakes at a height of 5.0 m-5.3 m from the ground surface. Is shaking. The shaking of the earthquake at a height of 5.0 m to 5.3 m from the ground surface may be different due to the shaking of the utility pole 1 by the earthquake as compared to the shaking of the earthquake on the ground surface. For this reason, the vibration meter 100 converts the acquired earthquake shake into an earthquake shake on the ground surface. The vibration meter 100 converts the obtained earthquake vibration on the ground surface into parameters such as seismic intensity, maximum acceleration, maximum speed, and spectral intensity. Here, the spectral intensity is a component obtained by decomposing an earthquake shake into components and arranging components obtained by the decomposition according to the magnitude of the intensity. Hereinafter, description will be continued for the case where seismic intensity is applied as an example of the parameter. In addition, hereinafter, the result of converting the shaking of the earthquake on the surface to the seismic intensity on the surface is referred to as “surface seismic intensity”. The vibrometer 100 creates earthquake information including the seismic intensity of the surface, the vibrometer ID that is identification information of the vibrometer, and the time information at which the earthquake shake is acquired, and transmits the created earthquake information to the relay device 200.
The relay device 200 is installed for each predetermined area such as a town. The relay apparatus 200 receives the earthquake information transmitted from the vibrometer 100 installed for each predetermined area. The relay device 200 transmits earthquake information (hereinafter referred to as “regional earthquake information”) including the received earthquake information and a relay device ID such as identification information of the relay device 200 to the server 300.

  The server 300 includes a vibrometer ID of the vibrometer 100 (vibrometer 100-1—vibrometer ID of the vibrometer 100-N) and position information (vibrometer 100-1-vibrometer) where the vibrometer 100 is installed. 100-N location information) is stored in association with each other. The server 300 receives the area earthquake information transmitted by the relay device 200. The server 300 acquires the position information stored in association with the vibrometer ID included in the received area earthquake information, and each position information is based on the acquired position information and the earthquake information included in the area earthquake information. The earthquake motion distribution is created by aggregating the earthquake information. The server 300 transmits the created seismic motion distribution to a notification destination such as a national or local government.

Hereinafter, the vibrometer 100, the relay device 200, and the server 300 included in the earthquake detection system will be sequentially described.
(Vibration meter)
FIG. 2 is a block diagram illustrating a vibrometer, a relay device, and a server included in the earthquake detection system according to the first embodiment.
The vibrometer 100 according to the first embodiment includes a communication unit 110, a storage unit 120, an information processing unit 130, a sensor 140, and a GPS 150.
The communication unit 110 is realized by a communication module. The communication unit 110 communicates with other devices such as the relay device 200. Specifically, the communication unit 110 transmits the earthquake information output from the information processing unit 130 to the relay device 200.

  The storage unit 120 is realized by, for example, a random access memory (RAM), a read only memory (ROM), a hard disk drive (HDD), a flash memory, or a hybrid storage device in which a plurality of these are combined. The storage unit 120 stores a program 121 executed by the information processing unit 130 and a vibration meter IDsid that is identification information of the vibration meter 100.

The sensor 140 measures an earthquake shake such as acceleration, speed, and displacement of the vibrometer 100. Hereinafter, as an example of an earthquake shake, the case where the sensor 140 measures acceleration will be described. Specifically, the sensor 140 measures three components of vertical motion, north-south motion, and east-west motion as a time domain signal of acceleration. The sensor 140 outputs acceleration (seismic shaking) information at a predetermined height from the ground surface of the utility pole 1 obtained by the measurement to the information processing unit 130. An example of the sensor 140 is realized by MEMS (Micro Electro Mechanical Systems).
The GPS 150 receives the time information and outputs the received time information to the information processing unit 130.

The information processing unit 130 is a functional unit (hereinafter, referred to as a software functional unit) realized by a processor such as a CPU (Central Processing Unit) executing the program 121 stored in the storage unit 120, for example. Note that all or part of the information processing unit 130 may be realized by hardware such as LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), or FPGA (Field-Programmable Gate Array). It may be realized by a combination of a unit and hardware.
The information processing unit 130 includes, for example, an acquisition unit 131, a processing unit 132, and a creation unit 133.

The acquisition unit 131 acquires acceleration (seismic shaking) information of a position at a predetermined height from the ground surface of the utility pole 1 output from the sensor 140, and acceleration (earthquake of a position at a predetermined height from the acquired ground surface of the utility pole 1. Information) is output to the processing unit 132. In addition, the acquisition unit 131 acquires time information output by the GPS, and outputs the acquired time information to the creation unit 133. In addition, the acquisition unit 131 acquires the vibration meter IDsid stored in the storage unit 120 and outputs the acquired vibration meter IDsid to the creation unit 133.
The processing unit 132 acquires the acceleration (earthquake shaking) information output by the acquisition unit 131, and converts the acquired acceleration information into acceleration information on the ground surface. Specifically, this will be described with reference to FIG.

The processing unit 132 performs Fourier transform on each of the three time domain signals included in the acceleration (earthquake shaking) information at a predetermined height from the ground surface of the utility pole 1 to obtain three frequency domain signals. Convert. The processing unit 132 performs a filtering process on each of the three frequency domain signals. Specifically, the processing unit 132 performs filtering processing on each of the three frequency domain signals by using a frequency effect filter, a high-cut (high-frequency elimination) filter, and a low-cut (low-frequency elimination) filter. Apply.
FIG. 3 is a diagram illustrating an example of processing executed by the vibrometer according to the first embodiment.
In FIG. 3, a response R (x, y, z) indicates the acceleration at a predetermined height from the ground surface of the utility pole 1 detected by the vibrometer 100, and x and y are two components (north-south) parallel to the ground surface. Z indicates a component (vertical movement) perpendicular to the ground surface. The vibration installed on the ground surface when converting the acceleration (earthquake shaking) at a predetermined height from the ground surface of the utility pole 1 obtained by the vibration meter 100 to the ground surface acceleration (earthquake shaking). Consider a total of 100G. Assume seismic intensity I (x, y, z) input to vibrometer 100G. The input I (x, y, z) indicates the acceleration (earthquake shaking) on the ground surface detected by the vibrometer 100G, and x and y indicate two components (north-south motion and east-west motion) parallel to the ground surface, z indicates a component (vertical movement) perpendicular to the ground surface.
Here, as an example of the response characteristic of the utility pole 1 (columnar structure), in order to obtain a transfer function matrix, a cross spectrum between input vectors which is a cross spectrum matrix between acceleration (earthquake shaking) components (vectors) on the ground surface cross-spectral matrices between the matrix _{II S,} and components of the acceleration in the ground acceleration position component (vector) from the surface of the utility pole 1 of a predetermined height (earthquake shaking) (earthquake shaking) (vector) Define an input / output vector cross-spectral matrix _RIS .

In Formula (1) -Formula (2), each component of the matrix is a cross spectrum. Here, it is assumed that the two time history signals (earthquake records) are sx (t) and sy (t). When these Fourier transforms are represented by Sx (ω) and Sy (ω), respectively, “S * x (ω) · S * y (ω)”, “Sx (ω) · S * y (ω)” Is the cross spectrum of both. (·) ^* Represents a conjugate complex number.
Since the input / output vector cross spectrum matrix _RIS is expressed by the product of the input vector cross spectrum matrix _IIS and the transfer function matrix (frequency response function) H, Equation (3) is obtained.
_RI S = _II S · H (3)
By multiplying both sides of Equation (3) by _II S ⁻¹ which is an inverse matrix of the input vector cross spectrum matrix _IIS , Equation (4) is obtained.
H = _II S ⁻¹ · _RI S (4)
Furthermore, a stable transfer function can be obtained by removing the accidental error. Specifically, when an ensemble average of a plurality of observation data is obtained, Expression (5) is obtained.
E [ _RI ⁻ S] = E [ _II ⁻ S] · H (5)
In Expression (5), _II ^- S and _RI ^- S are normalized cross spectra, and E [•] is an expected value. Expression (6) is obtained from Expression (5).
H = E [ _II ^- S- ¹ ] .E [ _RI ^- S] (6)

The processing unit 132 stores an inverse matrix H ⁻¹ of the transfer function matrix. As shown in Expression (7), the processing unit 132 performs a Fourier transform on the acceleration (earthquake shaking) information obtained during a predetermined period to the inverse matrix H ⁻¹ of the transfer function matrix (filtering process) three of the frequency-domain signal) _{F k} that (omega) (k, by multiplying the k = 1, 2, 3), a result of the Fourier transform shaking) information of the surface of the acceleration (earthquake _{F I} (omega) (I is I = 1, 2, 3).
F _I (ω) = H ⁻¹ · F _k (ω) (7)
The processing unit 132 obtains a three-component time domain signal of acceleration (earthquake shaking) of the ground surface by performing inverse Fourier transform on the result F _I (ω) obtained by Fourier transforming the acceleration (earthquake shaking) information of the earth surface. . Hereinafter, the case where the seismic intensity is obtained from the acceleration will be described as an example.
The processing unit 132 generates a combined acceleration by combining the three component time domain signals. The processing unit 132 derives α in which the total time for which the absolute value of the generated composite acceleration is equal to or greater than a certain value α is 0.3 seconds.
The processing unit 132 derives the surface seismic intensity by calculating 2 × log10α + 0.94. The processing unit 132 outputs information indicating the derived surface seismic intensity to the creation unit 133. Returning to FIG.

  The creation unit 133 acquires the time information output from the acquisition unit 131 and the vibration meter IDsid, and acquires information indicating the ground surface seismic intensity output from the processing unit 132. The creation unit 133 creates the earthquake information including the acquired time information, the vibration meter IDsid, and the information indicating the surface seismic intensity, and outputs the created earthquake information to the communication unit 110 with the relay device 200 as a destination.

(Relay device)
The relay device 200 is realized by a PC, a notebook PC, or the like.
The relay device 200 includes a communication unit 210, a communication unit 215, a storage unit 220, and an information processing unit 230.
The communication unit 210 is realized by a communication module. The communication unit 210 communicates with other devices such as the vibrometer 100. Specifically, the communication unit 210 receives earthquake information transmitted by the vibrometer 100 and outputs the received earthquake information to the information processing unit 230.

  The communication unit 215 is realized by a communication module. The communication unit 215 communicates with other devices such as the server 300. Specifically, the communication unit 215 acquires the area earthquake information output by the information processing unit 230 and transmits the acquired area earthquake information to the server 300.

  The storage unit 220 is realized by, for example, a RAM, a ROM, an HDD, a flash memory, or a hybrid storage device in which a plurality of these are combined. The storage unit 220 stores a program 221 executed by the information processing unit 230 and a relay device tid that is identification information of the relay device 200.

The information processing unit 230 is a software function unit that is realized, for example, by executing a program 221 stored in the storage unit 220 by a processor such as a CPU. Note that all or part of the information processing unit 230 may be realized by hardware such as LSI, ASIC, or FPGA, or may be realized by a combination of a software function unit and hardware.
The information processing unit 230 includes, for example, an acquisition unit 231 and a creation unit 233.

The acquisition unit 231 acquires the earthquake information output by the communication unit 210, and outputs the acquired earthquake information to the creation unit 233. In addition, the acquisition unit 231 acquires the relay device IDtid stored in the storage unit 220 and outputs the acquired relay device IDtid to the creation unit 233.
The creating unit 233 obtains the earthquake information and the relay device IDtid output from the obtaining unit 231 and creates the area earthquake information including the obtained earthquake information and the relay device IDtid and having the server 300 as the destination. The creation unit 233 outputs the created area earthquake information to the communication unit 215.

(server)
The server 300 is realized by a PC, a notebook PC, or the like.
The server 300 includes a communication unit 315, a storage unit 320, and an information processing unit 330.
The communication unit 315 is realized by a communication module. The communication unit 315 communicates with other devices such as the relay device 200 via the network 50. Specifically, the communication unit 315 receives the area earthquake information transmitted by the relay device 200 and outputs the received area earthquake information to the information processing unit 330. In addition, the communication unit 315 transmits information indicating the seismic motion distribution output from the information processing unit 330 to a notification destination such as a national or local government.

The storage unit 320 is realized by, for example, a RAM, a ROM, an HDD, a flash memory, or a hybrid storage device in which a plurality of these are combined. The storage unit 320 stores a program 321 executed by the information processing unit 330 and a position information table 322.
(Location information table)
FIG. 4 is a diagram illustrating an example of the position information table.
The position information table 322 is information in a table format in which the vibrometer ID is associated with information indicating the position where the vibrometer 100 is installed (hereinafter referred to as “vibrometer position information”). Here, the position of the vibrometer 100 is the position of the ground surface of the utility pole 1 where the vibrometer 100 is installed, and is represented by longitude and latitude. In the example shown in FIG. 4, the vibration meter ID “aaa” and the vibration meter position information “(xxx, yyy)” are associated with each other. Returning to FIG.

The information processing unit 330 is a software function unit that is realized, for example, by executing a program 321 stored in the storage unit 320 by a processor such as a CPU. Note that all or part of the information processing unit 330 may be realized by hardware such as LSI, ASIC, or FPGA, or may be realized by a combination of a software function unit and hardware.
The information processing unit 330 includes, for example, an acquisition unit 331 and a creation unit 333.

The acquisition unit 331 acquires the area earthquake information output by the communication unit 315 and outputs the acquired area earthquake information to the creation unit 333.
The creation unit 333 acquires the area earthquake information output by the acquisition unit 331, and acquires a plurality of earthquake information included in the acquired area earthquake information. The creation unit 333 refers to the position information table 322 stored in the storage unit 320 and acquires the vibration meter position information stored in association with the vibration meter ID included in each of the acquired plurality of earthquake information. The creation unit 333 associates the acquired vibrometer position information with information indicating the surface seismic intensity included in the earthquake information. The creation unit 333 associates the vibration meter position information with the information indicating the surface seismic intensity for all the earthquake information included in the area earthquake information. The creation unit 333 creates a seismic motion distribution based on all the associations between the vibrometer position information and the information indicating the surface seismic intensity. The creation unit 333 creates notification information including information representing the seismic motion distribution and time information included in the earthquake information with the notification destination as a destination, and outputs the created notification information to the communication unit 315.

(Operation of earthquake detection system)
FIG. 5 is a sequence chart showing an example of the operation of the earthquake detection system according to the first embodiment. In the example shown in FIG. 5, vibrometer 100-1-vibrometer 100-N is installed in a predetermined area such as a town. And the relay apparatus 200 receives the earthquake information which the vibrometer 100-1-vibrometer 100-N transmits. Here, a case where acceleration is applied will be described as an example of an earthquake shake.
(Step S1)
The sensor 140 of the vibrometer 100-1 acquires acceleration. The sensor 140 outputs information indicating the acquired acceleration to the information processing unit 130.
(Step S2)
In vibrometer 100-1, acquisition unit 131 acquires information indicating the acceleration output from sensor 140, and outputs information indicating the acquired acceleration to processing unit 132. The processing unit 132 acquires information indicating the acceleration output from the acquiring unit 131, and converts the acceleration into an acceleration on the ground surface based on the acquired information indicating the acceleration.
(Step S3)
In vibrometer 100-1, processing unit 132 converts the acceleration of the ground surface into a ground seismic intensity. The processing unit 132 outputs information indicating information indicating the surface seismic intensity to the creation unit 133.
(Step S4)
In vibration meter 100-1, creation unit 133 creates earthquake information including a vibration meter ID, time information, and information indicating the surface seismic intensity, and outputs the created earthquake information to communication unit 110.
(Step S5)
In vibration meter 100-1, communication unit 110 transmits the earthquake information output by creation unit 133 to relay device 200.

(Step S6)
The sensor 140 of the vibrometer 100-2 acquires acceleration. The sensor 140 outputs information indicating the acquired acceleration to the information processing unit 130.
(Step S7)
In vibrometer 100-2, acquisition unit 131 acquires information indicating the acceleration output from sensor 140, and outputs information indicating the acquired acceleration to processing unit 132. The processing unit 132 acquires information indicating the acceleration output from the acquiring unit 131, and converts the acceleration into an acceleration on the ground surface based on the acquired information indicating the acceleration.
(Step S8)
In vibrometer 100-2, processing unit 132 converts the acceleration of the ground surface into a ground seismic intensity. The processing unit 132 outputs information indicating the surface seismic intensity to the creation unit 133.
(Step S9)
In vibration meter 100-2, creation unit 133 creates earthquake information including a vibration meter ID, time information, and information indicating a ground seismic intensity, and outputs the created earthquake information to communication unit 110.
(Step S10)
In vibrometer 100-2, communication unit 110 transmits the earthquake information output by creation unit 133 to relay device 200.

(Step S11)
The sensor 140 of the vibrometer 100-N acquires acceleration. The sensor 140 outputs information indicating the acquired acceleration to the information processing unit 130.
(Step S12)
In vibrometer 100-N, acquisition unit 131 acquires information indicating the acceleration output from sensor 140, and outputs information indicating the acquired acceleration to processing unit 132. The processing unit 132 acquires information indicating the acceleration output from the acquiring unit 131, and converts the acceleration into an acceleration on the ground surface based on the acquired information indicating the acceleration.
(Step S13)
In vibrometer 100-N, processing unit 132 converts the acceleration of the ground surface into a ground seismic intensity. The processing unit 132 outputs information indicating the surface seismic intensity to the creation unit 133.
(Step S14)
In vibration meter 100 -N, creation unit 133 creates earthquake information including a vibration meter ID, time information, and information indicating the surface seismic intensity, and outputs the created earthquake information to communication unit 110.
(Step S15)
In vibrometer 100-N, communication unit 110 transmits the earthquake information output by creation unit 133 to relay device 200.

(Step S16)
The communication unit 210 of the relay apparatus 200 receives the earthquake information transmitted by each of the vibrometer 100-1-vibrometer 100-N and outputs the received plurality of earthquake information to the information processing unit 230. The acquisition unit 231 acquires the plurality of earthquake information output by the communication unit 210 and outputs the acquired plurality of earthquake information to the creation unit 233. The creation unit 233 obtains a plurality of earthquake information output by the obtaining unit 231 and creates area earthquake information based on the obtained plurality of earthquake information.
(Step S17)
The creation unit 233 outputs the created area earthquake information to the communication unit 210. The communication unit 215 acquires the area earthquake information output by the creation unit 233 and transmits the acquired area earthquake information to the server 300.
(Step S18)
The communication unit 315 of the server 300 receives the area earthquake information transmitted by the relay device 200 and outputs the received area earthquake information to the information processing unit 330. The acquisition unit 331 acquires the area earthquake information output by the communication unit 315 and outputs the acquired area earthquake information to the creation unit 333. The creation unit 333 acquires the area earthquake information output by the acquisition unit 331, and acquires a plurality of earthquake information included in the acquired area earthquake information. The creation unit 333 refers to the position information table 322 stored in the storage unit 320 and acquires the vibration meter position information stored in association with the vibration meter ID included in each of the acquired plurality of earthquake information. The creation unit 333 associates the acquired vibrometer position information with information indicating the surface seismic intensity included in the earthquake information. The creation unit 333 associates the vibration meter position information with the information indicating the surface seismic intensity for all of the plurality of earthquake information included in the area earthquake information. The creation unit 333 creates a seismic motion distribution based on all the associations between the vibrometer position information and the information indicating the surface seismic intensity. The creation unit 333 creates notification information including information indicating the seismic motion distribution and time information included in the earthquake information, with the notification destination as a destination, and outputs the created notification information to the communication unit 315.
(Step S19)
The communication unit 315 of the server 300 transmits the notification information output by the creation unit 333 to the notification destination. Specifically, when notified to the local government, the local government can make use of the disaster prevention plan. Specifically, the local government can be used to assume a disaster in the case of a small or medium earthquake, and can be used to grasp the degree of damage in the case of a large earthquake. In addition, when notified to the residents, the residents can grasp the ease of shaking of the earthquake and can make use of the assumption of the disaster.

In the first embodiment described above, the server 300 stores and stores the position information table 322 that is information in a table format in which the vibration meter ID is associated with information indicating the position where the vibration meter 100 is installed. Although the case where the position information table 322 is used to associate the information indicating the surface seismic intensity with the vibration meter position information has been described, the present invention is not limited to this example. For example, the vibration meter 100 may create earthquake information including the position information acquired by the GPS 150 and information indicating the surface seismic intensity, and transmit the created earthquake information to the relay device 200. With this configuration, the processing load on the server 300 can be reduced.
In the first embodiment described above, the case where the vibrometer 100 derives the surface seismic intensity from the acceleration acquired by the sensor 140 has been described, but the present invention is not limited to this example. For example, the server 300 may derive the surface seismic intensity from the acceleration.
In the first embodiment described above, the case where the vibrometer 100 derives the surface seismic intensity from the acceleration acquired by the sensor 140 has been described, but the present invention is not limited to this example. For example, the vibrometer 100 may derive the surface seismic intensity from the speed and displacement acquired by the sensor 140.
In the first embodiment described above, the case where the vibrometer 100 derives the surface seismic intensity from the acceleration acquired by the sensor 140 has been described, but the present invention is not limited to this example. For example, the vibrometer 100 may derive the maximum acceleration, the maximum speed, the spectral intensity, and the like from the acceleration acquired by the sensor 140. In this case, the server 300 may select an appropriate parameter for each evaluation target such as damage and risk from parameters such as seismic intensity, maximum acceleration, maximum speed, and spectrum intensity.
In the first embodiment described above, the case where the transfer function is derived using the cross spectrum matrix has been described, but the present invention is not limited to this. For example, the transfer function may be derived without using a cross spectrum matrix.
In the first embodiment described above, the vibrometer 100 transmits earthquake information to the relay device 200, and the relay device 200 transmits regional earthquake information including a plurality of earthquake information transmitted by the vibrometer 100 to the server 300. However, the present invention is not limited to this example. For example, the vibration meter 100 may transmit earthquake information directly to the server 300.
In the first embodiment described above, the case where the vibrometer 100 and the relay device 200 communicate wirelessly has been described. However, the present invention is not limited to this example. For example, the vibrometer 100 and the relay device 200 may be connected by wire.

According to the earthquake detection system of the first embodiment, the earthquake detection system includes a plurality of vibrometers and a server, and the vibrometer is attached to a columnar structure installed on the ground, and the earthquake in the columnar structure. A sensor that detects the vibration of the earth, a vibration meter processing unit that derives a parameter representing the earthquake vibration of the ground surface based on the earthquake vibration in the columnar structure detected by the sensor, and a parameter derived by the vibration meter processing unit A vibration meter communication unit that transmits earthquake information to the server, and the server includes a server communication unit that receives the earthquake information transmitted by each of the plurality of vibration meters, and each of the plurality of earthquake information received by the server communication unit. A server processing unit that creates a seismic motion distribution based on the included parameters and the position information from which the parameters are obtained. Columnar structures such as utility poles are more densely arranged than high-sensitivity seismometers and SI sensors. For this reason, parameters such as surface seismic intensity, surface maximum acceleration, surface maximum velocity, surface spectral intensity, etc., based on earthquake vibrations such as acceleration, velocity, and displacement detected by sensors attached to each of the power poles And a high-density seismic motion distribution can be created based on the derived parameters and the positional information from which the parameters are obtained. In other words, by using a columnar structure such as a utility pole as an installation location of the vibrometer, an ultra-high density seismic observation network with a minimum interval of several tens of meters can be realized. The created ground motion distribution can be used for earthquake disaster prevention. By installing a large number of vibrometers and using big data processing technology, it is possible to grasp how the ground shakes.
At present, the surface ground model created by the national and local governments for earthquake disaster prevention is the most detailed and has a 250 m grid. According to the earthquake detection system of the first embodiment, data can be obtained at intervals of about 1/10. For this reason, more precise seismic motion evaluation than before becomes possible.
In addition, the surface ground model currently created for earthquake disaster prevention by the national and local governments only discloses estimation results obtained by modeling the ground. According to the earthquake detection system of the first embodiment, the data to be acquired is actually observed data, and information can be provided in real time.
Further, instead of the servo accelerometer (servo seismometer) as the sensor, the cost can be reduced even when many vibrometers are installed by using MEMS that is cheaper than the servo accelerometer.
When simultaneous and frequent damage occurs in a wide area, it is difficult for the government alone to respond, and self-help, mutual assistance, and public assistance become important. However, at present, it is difficult to say that preparations for self-help and mutual assistance are in place, and a mechanism for promoting self-help and mutual assistance is necessary. In the earthquake detection system of the first embodiment, it is possible to create a seismic motion distribution based on the seismic information collected by the vibrometer and provide the created seismic motion distribution. Furthermore, it can be used to evaluate the soundness of houses, bridges, etc. during normal times, or to grasp the vulnerability of the area in advance.

(Second Embodiment)
(Earthquake detection system)
FIG. 6 is a diagram illustrating an example of the earthquake detection system according to the second embodiment. The earthquake detection system 10a according to the second embodiment creates a seismic motion distribution based on earthquake information and images acquired by each of a plurality of vibrometers.
The earthquake detection system 10a includes a vibration meter 100a-1, a vibration meter 100a-2,..., A vibration meter 100a-N (N is an integer of N> 0), a relay device 200, and a server 300a. Prepare. Vibrometer 100a-1, Vibrometer 100a-2,..., Vibrometer 100a-N are each attached to a columnar structure installed on the ground, such as a power facility, a distribution line utility pole, a streetlight, and a pole. FIG. 6 shows a utility pole 1-1, a utility pole 1-2,..., And a utility pole 1-N as an example of a columnar structure. The utility pole 1-1, the utility pole 1-2,..., The utility pole 1-N are arranged in a predetermined area such as a town at a predetermined interval such as 30m-50m, and the distribution line 2-1 and the distribution line 2- 2 is supported.

The vibrometer 100a-1 is attached to a position at a height of 5.0 m to 5.3 m from the ground surface of the utility pole 1-1 by a fixing member such as a brace. Vibrometer 100a-2 is attached to a position at a height of 5.0m-5.3m from the ground surface of utility pole 1-2 by a fixing member such as a brace. Vibrometer 100a-N is attached to a position at a height of 5.0m-5.3m from the ground surface of utility pole 1-N by a fixing member such as a brace.
The relay device 200 can communicate with each of the vibrometer 100a-1, the vibrometer 100a-2, ..., and the vibrometer 100a-N. FIG. 6 shows one relay device 200, but the relay device 200 is installed for each predetermined area such as a town. The relay device 200 and the server 300a are connected via the network 50. The server 300a can communicate with the relay device 200.
Hereinafter, among the vibrometer 100a-1, vibrometer 100a-2,..., Vibrometer 100a-N, an arbitrary vibrometer is referred to as a vibrometer 100a.

The vibrometer 100a periodically acquires an earthquake shake such as acceleration, speed, and displacement and an image. Here, since the vibration meter 100a is mounted at a height of 5.0m-5.3m from the ground surface, the earthquake shakes at a height of 5.0m-5.3m from the ground surface. Is shaking. The shaking of the earthquake at a height of 5.0 m to 5.3 m from the ground surface may be different due to the shaking of the utility pole 1 by the earthquake as compared with the acceleration on the ground surface. For this reason, the vibration meter 100a converts the acquired earthquake shake into an earthquake shake on the ground surface. The vibration meter 100a converts the obtained earthquake vibration on the ground surface into an earthquake vibration on the ground surface. The image is an image obtained by imaging the lower part from the position where the vibrometer 100a is attached, and is an image in the vicinity of the utility pole 1. The vibration meter 100a creates earthquake information including the vibration of the earthquake on the ground surface, the vibration meter ID that is the identification information of the vibration meter, the time information that acquired the seismic intensity, and the image information, and the created earthquake information is transmitted to the relay device 200. Send to.
The relay device 200 is installed for each predetermined area such as a town. The relay apparatus 200 receives the earthquake information transmitted from the vibrometer 100a installed in a predetermined area. The relay device 200 transmits the area earthquake information including the received earthquake information and the relay device ID such as the identification information of the relay device 200 to the server 300a.

  The server 300a stores a vibration meter ID of the vibration meter 100a and position information where the vibration meter 100 is installed in association with each other. The server 300a receives the area earthquake information transmitted by the relay device 200. The server 300a acquires the position information stored in association with the vibrometer ID included in the received area earthquake information, and based on the acquired position information, the earthquake information and the image information included in the area earthquake information, By collecting the earthquake information and image information of each position information, disaster degree information such as earthquake motion distribution and damage degree distribution is created. The server 300a transmits the created seismic motion distribution and damage distribution to a notification destination such as a municipality. Hereinafter, the description will be continued with respect to the case where acceleration is applied as an example of earthquake shaking.

Hereinafter, the vibration meter 100a and the server 300a included in the earthquake detection system 10 will be sequentially described.
(Vibration meter)
FIG. 7 is a block diagram illustrating a seismometer, a relay device, and a server included in the earthquake detection system according to the second embodiment.
The vibrometer 100a according to the second embodiment includes a communication unit 110, a storage unit 120a, an information processing unit 130a, a sensor 140, a GPS 150, and an imaging device 160.
The storage unit 120a is realized by, for example, a RAM, a ROM, an HDD, a flash memory, or a hybrid storage device in which a plurality of these are combined. The storage unit 120a stores a program 121a executed by the information processing unit 130a and a vibration meter IDsid that is identification information of the vibration meter 100a.

The information processing unit 130a is a software function unit that is realized, for example, when a processor such as a CPU executes the program 121a stored in the storage unit 120a. Note that all or part of the information processing unit 130a may be realized by hardware such as LSI, ASIC, or FPGA, or may be realized by a combination of a software function unit and hardware.
The information processing unit 130a includes, for example, an acquisition unit 131a, a processing unit 132, and a creation unit 133a.

  The acquisition unit 131 a acquires the acceleration information output from the sensor 140 and outputs the acquired acceleration information to the processing unit 132. Moreover, the acquisition part 131a acquires the time information which GPS output, and outputs the acquired time information to the preparation part 133a. In addition, the acquisition unit 131a acquires the vibration meter IDsid stored in the storage unit 120a and outputs the acquired vibration meter IDsid to the creation unit 133a. In addition, the acquisition unit 131a acquires image information obtained by imaging by the imaging device 160, and outputs the acquired image information to the creation unit 133a.

  The creation unit 133a acquires the time information output from the acquisition unit 131a, the vibration meter IDsid, and the image information, and acquires information indicating the surface seismic intensity output from the processing unit 132. The creation unit 133a creates the earthquake information including the acquired time information, vibration meter IDsid, information indicating the surface seismic intensity, and image information, and outputs the created earthquake information to the communication unit 110, with the relay device 200 as a destination. .

(server)
The server 300a is realized by a PC, a notebook PC, or the like.
The server 300a includes a communication unit 315, a storage unit 320a, and an information processing unit 330a.
The storage unit 320a is realized by, for example, a RAM, a ROM, an HDD, a flash memory, or a hybrid storage device in which a plurality of these are combined. The storage unit 320a stores a program 321a executed by the information processing unit 330a and a position information table 322.

The information processing unit 330a is a software function unit realized, for example, when a processor such as a CPU executes a program 321a stored in the storage unit 320a. Note that all or part of the information processing unit 330a may be realized by hardware such as LSI, ASIC, or FPGA, or may be realized by a combination of a software function unit and hardware.
The information processing unit 330a includes, for example, an acquisition unit 331 and a creation unit 333a.

  The creation unit 333a acquires the area earthquake information output by the acquisition unit 331a, and acquires a plurality of earthquake information included in the acquired area earthquake information. The creation unit 333a refers to the position information table 322 stored in the storage unit 320a, and acquires the vibration meter position information stored in association with the vibration meter ID included in each of the acquired plurality of earthquake information. The creation unit 333a associates the acquired vibrometer position information, information indicating the surface seismic intensity included in the earthquake information, and image information. The creation unit 333a associates the vibration meter position information, the information indicating the surface seismic intensity, and the image information for all the earthquake information included in the area earthquake information. The creation unit 333a creates the seismic motion distribution and the damage degree distribution based on all of the association between the vibration meter position information, the information indicating the surface seismic intensity, and the image information. Here, the damage distribution refers to a surface distribution of the degree of damage in an earthquake. The creation unit 333a creates notification information including information indicating the seismic motion distribution, information indicating the damage distribution, and time information included in the earthquake information with the notification destination as a destination, and outputs the generated notification information to the communication unit 315. To do.

(Operation of earthquake detection system)
FIG. 8 is a sequence chart showing an example of the operation of the earthquake detection system according to the second embodiment. In the example shown in FIG. 8, vibrometer 100a-1-vibrometer 100a-N is installed in a predetermined area such as a town. And the relay apparatus 200 receives the earthquake information which the vibrometer 100a-1-vibrometer 100a-N transmits.
(Step S31)
The imaging device 160 of the vibrometer 100a-1 captures an image and acquires image information obtained by capturing the image. The imaging device 160 outputs the acquired image information to the information processing unit 130a.
(Step S32)
The sensor 140 of the vibrometer 100a-1 acquires acceleration. The sensor 140 outputs information indicating the acquired acceleration to the information processing unit 130a.
(Step S33)
In vibrometer 100a-1, acquisition unit 131a acquires information indicating the acceleration output from sensor 140, and outputs information indicating the acquired acceleration to processing unit 132. The processing unit 132 acquires information indicating the acceleration output from the acquiring unit 131a, and converts the acceleration into an acceleration on the ground surface based on the acquired information indicating the acceleration.
(Step S34)
In vibrometer 100a-1, processing unit 132 converts the acceleration of the ground surface into a ground seismic intensity. The processing unit 132 outputs information indicating information indicating the surface seismic intensity to the creation unit 133a.
(Step S35)
In vibration meter 100 a-1, creation unit 133 a creates earthquake information including vibration meter ID, time information, information indicating surface seismic intensity, and image information, and outputs the created earthquake information to communication unit 110.

(Step S36)
In vibrometer 100a-1, communication unit 110 transmits the earthquake information output by creation unit 133a to relay device 200.
(Step S37)
The imaging device 160 of the vibrometer 100a-2 captures images and acquires image information obtained by capturing the images. The imaging device 160 outputs the acquired image information to the information processing unit 130a.
(Step S38)
Vibrometer 100a-2 sensor 140 acquires acceleration. The sensor 140 outputs information indicating the acquired acceleration to the information processing unit 130a.
(Step S39)
In vibrometer 100a-2, acquisition unit 131a acquires information indicating the acceleration output from sensor 140, and outputs information indicating the acquired acceleration to processing unit 132. The processing unit 132 acquires information indicating the acceleration output from the acquiring unit 131a, and converts the acceleration into an acceleration on the ground surface based on the acquired information indicating the acceleration.
(Step S40)
In vibrometer 100a-2, processing unit 132 converts the acceleration of the ground surface into a ground seismic intensity. The processing unit 132 outputs information indicating the surface seismic intensity to the creation unit 133a.

(Step S41)
In vibration meter 100 a-2, creation unit 133 a creates earthquake information including vibration meter ID, time information, information indicating surface seismic intensity, and image information, and outputs the created earthquake information to communication unit 110.
(Step S42)
In vibrometer 100a-2, communication unit 110 transmits the earthquake information output by creation unit 133a to relay device 200.
(Step S43)
The imaging device 160 of the vibrometer 100a-N images and acquires image information obtained by imaging. The imaging device 160 outputs the acquired image information to the information processing unit 130a.
(Step S44)
The sensor 140 of the vibrometer 100a-N acquires acceleration. The sensor 140 outputs information indicating the acquired acceleration to the information processing unit 130a.
(Step S45)
In vibrometer 100a-N, acquisition unit 131a acquires information indicating the acceleration output from sensor 140, and outputs the information indicating the acquired acceleration to processing unit 132. The processing unit 132 acquires information indicating the acceleration output from the acquiring unit 131a, and converts the acceleration into an acceleration on the ground surface based on the acquired information indicating the acceleration.

(Step S46)
In vibrometer 100a-N, processing unit 132 converts the acceleration of the ground surface into a ground seismic intensity. The processing unit 132 outputs information indicating the surface seismic intensity to the creation unit 133a.
(Step S47)
In vibration meter 100 a -N, creation unit 133 a creates earthquake information including vibration meter ID, time information, information indicating surface seismic intensity, and image information, and outputs the created earthquake information to communication unit 110.
(Step S48)
In vibrometer 100a-N, communication unit 110 transmits the earthquake information output by creation unit 133a to relay device 200.

(Step S49)
The communication unit 210 of the relay apparatus 200 receives the earthquake information transmitted by each of the vibrometer 100a-1-vibrometer 100a-N and outputs the received earthquake information to the information processing unit 230. The acquisition unit 231 acquires the earthquake information output by the communication unit 210, and outputs the acquired earthquake information to the creation unit 233. The creating unit 233 obtains the earthquake information output by the obtaining unit 231 and creates area earthquake information based on the obtained earthquake information.
(Step S50)
The creation unit 233 outputs the created area earthquake information to the communication unit 210. The communication unit 215 acquires the area earthquake information output from the creation unit 233, and transmits the acquired area earthquake information to the server 300a.
(Step S51)
The communication unit 315 of the server 300 a receives the regional earthquake information transmitted by the relay device 200 and outputs the received regional earthquake information to the information processing unit 230. The acquisition unit 331 acquires the area earthquake information output by the communication unit 315, and outputs the acquired area earthquake information to the creation unit 333a. The creation unit 333a acquires the area earthquake information output by the acquisition unit 331, and acquires a plurality of earthquake information included in the acquired area earthquake information. The creation unit 333a refers to the position information table 322 stored in the storage unit 320a, and acquires the vibration meter position information stored in association with the vibration meter ID included in each of the acquired plurality of earthquake information. The creation unit 333a associates the acquired vibrometer position information, information indicating the surface seismic intensity included in the earthquake information, and image information. The creation unit 333a associates the vibration meter position information, the information indicating the surface seismic intensity, and the image information with respect to all of the plurality of earthquake information included in the area earthquake information. The creation unit 333a creates the seismic motion distribution and the damage degree distribution based on all of the association between the vibration position information, the information indicating the surface seismic intensity, and the image information. The creation unit 333a creates notification information including the information indicating the seismic motion distribution, the information indicating the damage distribution, and the time information included in the earthquake information, with the notification destination as the destination, and sends the generated notification information to the communication unit 315. Output.
(Step S52)
The communication unit 315 of the server 300a transmits the notification information output from the creation unit 333a to the notification destination. Specifically, when notified to the local government, the local government can make use of the disaster prevention plan. Specifically, the local government can be used to assume a disaster in the case of a small or medium earthquake, and can be used to grasp the degree of damage in the case of a large earthquake. In addition, when notified to the residents, the residents can grasp the ease of shaking of the earthquake and can make use of the assumption of the disaster. In addition, when notified to the residents, the residents can know road information (daily, at the time of an earthquake, flooding situation), surrounding fire conditions, and evacuation situation information (congestion, food allowance, etc.).

In the second embodiment described above, the server 300a stores the position information table 322, which is information in a table format in which the vibration meter ID and the information indicating the position where the vibration meter 100a is installed are stored. Although the case where the information indicating the surface seismic intensity, the vibration meter position information, and the image information are associated using the position information table 322 has been described, the present invention is not limited to this example. For example, the vibration meter 100a may create earthquake information including vibration meter position information acquired by the GPS 150, information indicating the surface seismic intensity, and image information, and transmit the created earthquake information to the relay device 200. . With this configuration, the processing load on the server 300a can be reduced. In this case, the server 300a may derive the ground deformation based on the vibrometer position information acquired by the GPS 150. For example, the creation unit 333a of the server 300a may derive time-series data of ground deformation from the reference date and time. Further, the creation unit 333a of the server 300a may derive time-series data in which the ground deformation time-series data and the ground state are associated with each other by combining the seismic intensity position information and the image information. Because it is possible to capture lateral deformation due to liquefaction due to earthquakes and rainfall, and ground deformation such as landslides, information can be transmitted to residents and local governments. For this reason, it can be used for regional disaster prevention.
In the second embodiment described above, the case has been described in which the vibrometer 100a derives the surface seismic intensity from the acceleration acquired by the sensor 140. However, the present invention is not limited to this example. For example, the server 300a may derive the ground surface seismic intensity from the acceleration.
In the second embodiment described above, the case has been described in which the vibrometer 100a derives the surface seismic intensity from the acceleration acquired by the sensor 140. However, the present invention is not limited to this example. For example, the vibrometer 100a may derive the surface seismic intensity from the speed and displacement acquired by the sensor 140.
In the second embodiment described above, the vibration meter 100a transmits earthquake information to the relay device 200, and the relay device 200 transmits area earthquake information including a plurality of earthquake information transmitted by the vibration meter 100a to the server 300a. However, the present invention is not limited to this example. For example, the vibration meter 100a may transmit earthquake information directly to the server 300a.
In the second embodiment described above, a case has been described in which the vibrometer 100a and the relay device 200 communicate wirelessly, but the present invention is not limited to this example. For example, the vibrometer 100a and the relay device 200 may be connected by wire.

According to the earthquake detection system of the second embodiment, the earthquake detection system of the first embodiment has a function of creating a damage degree distribution including an image obtained by imaging by an imaging device, thereby providing a wide area. In addition, since it is possible to observe high-density ground deformations, it is possible to capture ground deformations in residential areas such as lateral flow and landslides due to liquefaction due to earthquakes and rainfall. For this reason, much information can be provided rather than the earthquake detection system of 1st Embodiment.
When simultaneous and frequent damage occurs in a wide area, it is difficult for the government alone to respond, and self-help, mutual assistance, and public assistance become important. However, at present, it is difficult to say that preparations for self-help and mutual assistance are in place, and a mechanism for promoting self-help and mutual assistance is necessary. In the earthquake detection system of the present embodiment, the earthquake motion distribution can be created based on the earthquake information collected by the vibrometer and the image information, and the created earthquake motion distribution can be provided. . Furthermore, it can be used to evaluate the soundness of houses, bridges, etc. during normal times, or to grasp the vulnerability of the area in advance.

  As mentioned above, although embodiment was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the scope of the invention. These embodiments are included in the scope and gist of the invention, and at the same time, are included in the invention described in the claims and the equivalents thereof.

The above-described vibrometer 100, relay device 200, server 300, vibrometer 100a, and server 300a may be realized by a computer. In that case, a program for realizing the function of each functional block is recorded on a computer-readable recording medium. The program recorded on the recording medium may be read by a computer system and executed by the CPU. The “computer system” here includes hardware such as an OS (Operating System) and peripheral devices.
The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM. The “computer-readable recording medium” includes a storage device such as a hard disk built in the computer system.

Furthermore, the “computer-readable recording medium” may include a medium that dynamically holds a program for a short time. What holds the program dynamically for a short time is, for example, a communication line when the program is transmitted via a network such as the Internet or a communication line such as a telephone line.
Further, the “computer-readable recording medium” may include a medium that holds a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client. The program may be for realizing a part of the functions described above. Further, the program may be a program that can realize the above-described functions in combination with a program already recorded in the computer system. The program may be realized using a programmable logic device. The programmable logic device is, for example, an FPGA (Field Programmable Gate Array).

The above-described vibrometer 100, relay device 200, server 300, vibrometer 100a, and server 300a have a computer inside. The processes of the vibration meter 100, the relay device 200, the server 300, the vibration meter 100a, and the server 300a are stored in a computer-readable recording medium in the form of a program, and the computer reads the program. The above processing is performed by executing the above.
Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.
The program may be for realizing a part of the functions described above.
Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.
In the first embodiment and the second embodiment described above, the sensor is an example of a sensor, the processing unit 132 is an example of a vibrometer processing unit, the communication unit 110 is an example of a vibrometer communication unit, and communication is performed. The unit 315 is an example of a server communication unit, and the GPS is an example of a time acquisition unit.

1, 1-1, 1-2,..., 1-N ... utility pole, 10, 10a ... earthquake detection system, 50 ... network, 100, 100-1, 100-2, ..., 100-N, 100a, 100a-1, 100a-2,..., 100a-N ... vibrometer, 110 ... communication unit, 120, 120a ... storage unit, 121, 121a ... program, 130, 130a ... information processing unit, 131, 131a ... acquisition unit, 132 ... processing unit, 133, 133a ... creation unit, 140 ... sensor, 150 ... GPS, 160 ... imaging device, 200 ... relay device, 210, 215 ... communication unit, 220 ... storage unit, 221 ... program, 230 ... Information processing unit, 231 ... Acquisition unit, 232 ... Processing unit, 300, 300a ... Server, 315 ... Communication unit, 320, 320a ... Storage unit, 321, 321a ... Program, 22 ... position information table, 330,330A ... information processing unit, 331,331A ... acquisition unit, 333,333A ... creation unit

Claims (7)

An earthquake detection system comprising a plurality of vibration meters and a server,
The vibrometer is
A sensor that is attached to a columnar structure installed on the ground and detects earthquake shaking in the columnar structure;
A vibration meter processing unit for deriving a parameter representing the earthquake vibration of the ground surface based on the earthquake vibration in the columnar structure detected by the sensor;
A vibration meter communication unit that transmits earthquake information including the parameters derived by the vibration meter processing unit to a server;
The server
A server communication unit that receives the earthquake information transmitted by each of the plurality of vibrometers;
An earthquake detection system comprising: a server processing unit that creates a seismic motion distribution based on a parameter included in each of the plurality of earthquake information received by the server communication unit and position information obtained from the parameter.   The earthquake detection system according to claim 1, wherein the columnar structure is one of a power facility, a power pole, a streetlight, and a pole.   The vibration meter processing unit derives an earthquake vibration on the ground surface based on the earthquake vibration in the columnar structure, and converts the derived earthquake vibration on the ground surface into the parameter. The earthquake detection system according to claim 2.   The earthquake detection system according to claim 3, wherein the vibrometer processing unit derives an earthquake shake on the ground surface from a shake in the columnar structure based on a response characteristic of the columnar structure. The vibrometer is
Comprising an imaging device attached to the columnar structure;
The vibrometer communication unit transmits earthquake information including image information obtained by imaging by the imaging device to the server,
The said server processing part produces damage degree information based on the image information contained in the said earthquake information which each of the said several vibrometer transmitted. Earthquake detection system. The vibrometer is
A time acquisition unit attached to the columnar structure;
The vibration meter communication unit transmits earthquake information including time information acquired by the time acquisition unit to the server,
The earthquake according to any one of claims 1 to 5, wherein the server processing unit creates a seismic motion distribution based on time information included in the earthquake information transmitted by each of the plurality of vibrometers. Detection system. The vibration meter communication unit transmits earthquake information including identification information of the vibration meter to the server,
The server
A storage unit that stores the identification information of each of the plurality of vibration meters and the position information of each vibration meter in association with each other,
The server processing unit acquires position information associated with vibration meter identification information included in the earthquake information transmitted by each of the plurality of vibration meters from the position information stored in the storage unit, The earthquake detection system according to any one of claims 1 to 6, wherein a seismic motion distribution is created based on the plurality of acquired position information.

Images