JP7236350B2 - Object selection system, object selection device and program - Google Patents

Description

The present invention relates to an object selection system, an object selection device, and a program.

As a conventional technology, there is a system for predicting damage caused by an earthquake by detecting the shaking of the earthquake with a seismometer installed on the ground surface.

Patent Document 1 discloses a seismometer having a seismic sensor that detects seismic motion waveform data of an earthquake together with elapsed time data, and a seismometer computer that estimates and calculates seismic information including epicenter distance and earthquake magnitude based on the seismic motion waveform data. A device is described. An earthquake information network system in which a plurality of seismometer devices are connected to a central processing unit having a central computer via a first line, and an earthquake countermeasure control device is connected to the plurality of seismometer devices via a second line or the like. is described. Furthermore, when an earthquake occurs, the seismometer computer estimates and computes an earthquake damage index value that indicates the degree of earthquake damage that the earthquake will cause to the seismometer device and the vicinity based on the epicenter distance and the magnitude of the earthquake obtained by the estimation computation. is described.

JP 2006-284226 A

However, a seismometer is a device for measuring vibrations caused by earthquakes, and is not a device for measuring actual vibrations of objects such as structures. Also, the seismometers are not densely installed for the purpose of measuring earthquake vibrations in the area. And even if you try to install them densely, it is actually difficult because seismometers are expensive. Therefore, it is generally difficult for seismometers to select objects that will be damaged by an earthquake. In addition, there is a demand to select objects affected by vibrations, not limited to earthquakes.
An object of the present invention is to provide an object selection system or the like that can more easily select objects that are affected by vibrations such as earthquakes.

Thus, according to the present invention, a plurality of vibration sensors output information including a numerical value indicating the magnitude of vibration at an installed point, and a plurality of vibration sensors based on the numerical values output by each of the plurality of vibration sensors. A point information acquiring means for selecting a set of vibration sensors from among and acquiring point information, which is information specifying the point where each of the selected set of vibration sensors is installed, and position information are associated with each other There is provided an object selection system comprising: a structure selection means for selecting, from among objects, objects located between points related to point information acquired by the point information acquisition means. In this case, objects affected by vibrations such as earthquakes can be more easily selected.
Here, the structure selecting means can create a map showing the distribution of the magnitude of vibration based on the numerical values, and select the object based on the map. In this case, the distribution of vibration can be grasped.
Also, the structure selecting means can select a predetermined structure based on the map. In this case, structures that are susceptible to damage can be selected with higher accuracy.
Furthermore, the structure selecting means can select an object positioned between a plurality of adjacent vibration sensors having a large difference between the numerical values. In this case, the target object can be selected more easily.
Furthermore, the structure selecting means can select an object positioned between a plurality of vibration sensors having a large difference between a numerical value and a predetermined numerical value. In this case, the target can be more easily selected by selecting the target that differs from the numerical value that should be originally output.
Further, the structure selecting means can select the object based on the vibration mode of the vibration detected by each of the plurality of vibration sensors. In this case, the influence of vibration can be grasped based on the natural frequency.
Then, the structure selecting means can select the object based on the stress caused by the vibration detected by each of the plurality of vibration sensors. In this case, the influence of vibration can be grasped based on the stress.
Also, the structure selecting means can select objects affected by the vibration of an earthquake. In this case, objects that can be affected by an earthquake can be selected.
Furthermore, the structure selection means can select structures that may be damaged by an earthquake as objects. In this case, objects that can be damaged by an earthquake can be selected.
Then, the structure selecting means can select the place where the accident occurred as the object based on the vibration caused by the accident. In this case, the location of the accident can be selected as the object.
Further, the structure selecting means can select a site where fatigue has accumulated as the object based on the vibration. In this case, an object with accumulated fatigue can be selected.

Furthermore, according to the present invention, based on the numerical value output by each of the plurality of vibration sensors that output information including the numerical value indicating the magnitude of vibration at the installed point, a set of vibration sensors is selected from among the plurality of vibration sensors. point information acquisition means for selecting vibration sensors from among the set of vibration sensors and acquiring point information that is information specifying the point where each of the selected set of vibration sensors is installed; and a structure selecting means for selecting an object located between points related to the point information acquired by the point information acquiring means. In this case, objects affected by vibrations such as earthquakes can be more easily selected.

Furthermore, according to the present invention, a plurality of vibration sensors output information including a numerical value indicating the magnitude of vibration at an installed point to a computer. A location information acquisition function that selects a set of vibration sensors from among them and acquires location information that is information specifying the location where each of the selected set of vibration sensors is installed, and a target associated with the location information A program for realizing a structure selection function for selecting, from among objects, objects located between locations related to location information acquired by the location information acquisition function is provided. In this case, the computer can realize a function of more easily selecting objects that are affected by vibrations such as earthquakes.

Advantageous Effects of Invention According to the present invention, it is possible to provide an object selection system and the like that can more easily select objects that will be damaged by vibrations such as earthquakes.

1 is a diagram showing a configuration example of an object selection system according to an embodiment; FIG. FIG. 4 is a diagram showing an example of schematic operation of the object selection system; 1 is a block diagram showing a functional configuration example of an object selection system; FIG. 4 is a flow chart describing the operation of the object selection system; It is the figure which showed about the method of creating the map showing the magnitude|size of a vibration, and selecting a structure based on this map. (a) is a diagram showing a first example of a method of selecting locations that may have been damaged by an earthquake. (b) is a diagram showing a second example of a method of selecting locations that may have been damaged by an earthquake. (a) and (b) are diagrams showing a method of selecting a location where an accident occurred based on maximum acceleration. It is the figure which showed the method of calculating|requiring the fatigue of a structure using a vibration mode. (a) to (b) are diagrams showing a method of obtaining fatigue of a structure using vibration modes. (a) to (b) are diagrams showing a method of obtaining fatigue of a structure using vibration modes. FIG. 3 is a diagram showing a method of obtaining fatigue of a structure from stress caused by vibration;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Description of the entire object selection system 1>
FIG. 1 is a diagram showing a configuration example of an object selection system 1 according to this embodiment.
As illustrated, the object selection system 1 of the present embodiment includes a vibration sensor 10 that detects vibration, a management server 20 that manages vibration-related data acquired by the vibration sensor 10, and a notification from the management server 20. A terminal device 30 and a network 40 connecting the vibration sensor 10 , the management server 20 and the terminal device 30 are provided.

The vibration sensor 10 outputs information including a numerical value indicating the magnitude of vibration at the point where it is installed. A plurality of vibration sensors 10 are provided as illustrated. These vibration sensors 10 are installed at points where vibration is desired to be measured. The point where the vibration sensor 10 is installed is, for example, the surface or inside of a predetermined structure. Moreover, although it may be installed on the surface of the earth, it may be installed at a position away from the surface of the earth. The structures may be, for example, buildings such as houses and buildings, bridges, viaducts, tunnels used for roads and railways, dams, airport runways, and roads. Furthermore, the member etc. which comprise these may be used.

The vibration sensor 10 is, for example, a MEMS (Micro Electro Mechanical Systems) acceleration sensor. As a result, the vibration sensor 10 can be made smaller and lighter than a general seismometer. Therefore, it can be installed in a small space such as a gap. Furthermore, because of its low power consumption, it can be operated with a battery and does not require a commercial power source. Therefore, it can be installed in places where power supply construction is difficult. That is, the degree of freedom of installation is high.
Since the vibration sensor 10 is less expensive, it is easier to increase the number of vibration measurement points and install them more densely than a general seismometer.

If the vibration sensor 10 is a MEMS acceleration sensor, for example, it can output information that quantifies the acceleration of vibration. However, the information is not limited to this, and may be any information related to vibration. For example, information obtained by digitizing maximum acceleration, velocity, maximum velocity, amplitude, maximum amplitude, frequency, etc. may be output. Also, the instrumental seismic intensity, SI value, response speed, response acceleration, etc. calculated from these may be output. Furthermore, the unique ID of the vibration sensor 10 and information on the measurement time can be output together.

Alternatively, the vibration sensor 10 may incorporate a GPS (Global Positioning System), and point information, which is the information of the point at which the vibration sensor 10 is installed, obtained by the GPS may be output.
The point information is, for example, information on the position of the vibration sensor 10 on the earth, and is described by north latitude, east longitude, and the like. Further, the point information is, for example, information on the position in the building, and is information on the number of floors where the equipment is installed and the position on the plane of the floor. Further, the point information is, for example, information of coordinates based on the origin when the origin is set at an arbitrary location. This coordinate information can be described by an x, y coordinate system that is a two-dimensional orthogonal coordinate system and an x, y, z coordinate system that is a three-dimensional orthogonal coordinate system. A polar coordinate system or a cylindrical coordinate system may be used instead of such an orthogonal coordinate system.

The SI value is one of indices representing the intensity of vibration such as an earthquake, and is defined by the following formula 1 using the velocity response spectrum S _V (T) of vibration.

From Equation 1, the SI value is the average value of the velocity response spectrum S _V (T) in the range of the natural period T from 0.1 s to 2.5 s. The natural period in this range corresponds to the natural period of common structures. Therefore, the SI value is an index that indicates how much a general structure shakes. In other words, a vibration with a large SI value means that the structure shakes greatly. Since there is a correlation between the magnitude of the shaking and the damage caused to the structure, the SI value also serves as an index indicating the susceptibility of the structure to damage. That is, the larger the SI value, the more the structure shakes due to vibration, and the more likely it is to cause damage.
Moreover, the SI value and the instrumental seismic intensity are highly correlated, and the instrumental seismic intensity of an earthquake can be obtained by using the SI value without using an expensive seismometer.

The vibration sensor 10 connects to the network 40 and transmits information about vibration to the management server 20 as transmission information. In this case, the vibration sensor 10 performs transmission through, for example, a wireless communication line. Types of wireless communication lines include mobile phone lines, PHS (Personal Handy-phone System) lines, Wi-Fi (Wireless Fidelity, registered trademark), Bluetooth (registered trademark), ZigBee (registered trademark), and UWB (Ultra Wideband). It is possible to use a line according to an existing system such as It should be noted that the transmission information may be transmitted by connecting to the network 40 using a wired communication line instead of the wireless communication line. Note that the vibration sensor 10 may be provided with a data accumulation unit for accumulating information such as numerical values, and collectively transmit information for a certain period of time.

Note that the vibration sensor 10 may be installed together with equipment having other functions. For example, the vibration sensor 10 may be built in or attached to a gas meter that measures the amount of city gas or propane gas used. As a result, normally, the communication function of the vibration sensor 10 transmits information about the amount of gas used measured by the gas meter. The information about the amount of gas used includes, for example, the date and time of measurement, the device number of the gas meter, etc., in addition to the amount of gas used. Then, when vibration such as an earthquake is detected, the above-described information about the vibration is transmitted. Examples other than gas meters include electric meters, water meters, and telephones.

The management server 20 is an example of an object selection device that selects objects such as structures, and is a server computer that manages the entire object selection system 1 . Although details will be described later, it manages transmission information acquired from a plurality of vibration sensors 10 . Furthermore, the management server 20 acquires location information of these vibration sensors 10 . Then, based on the obtained information, a set of vibration sensors is selected, and an object that can be affected by vibration is selected.

The terminal device 30 is, for example, a computer device such as a desktop computer, mobile computer, mobile phone, smart phone, or tablet. Terminal device 30 connects to network 40 for communication. In order to connect the terminal device 30 to the network 40, similarly to the vibration sensor 10, a wireless communication line may be used, or a wired communication line may be used. Then, the terminal device 30 receives notification information as information to be transmitted from the management server 20 .

The management server 20 and the terminal device 30 are provided with a CPU (Central Processing Unit), which is computing means, and a main memory, which is storage means. Here, the CPU executes various types of software such as an OS (basic software) and applications (application software). The main memory is a storage area for storing various software and data used for executing the software. Furthermore, the management server 20 and the terminal device 30 include a communication interface (hereinafter referred to as "communication I/F") for communicating with the outside, a display mechanism including a video memory and a display, input buttons, An input mechanism such as a touch panel and a keyboard is provided. Moreover, the management server 20 and the terminal device 30 are provided with a storage as an auxiliary storage device. The storage is, for example, an HDD (Hard Disk Drive) or an SSD (Solid State Drive).

The network 40 is communication means used for information communication between the vibration sensor 10, the management server 20, and the terminal device 30, and is, for example, the Internet, a LAN (Local Area Network), or an access point.

<Outline description of the operation of the object selection system 1>
FIG. 2 is a diagram showing an example of a schematic operation of the object selection system 1. As shown in FIG.
First, when the vibration sensor 10 detects vibration, the SI value is calculated from the vibration acceleration and the like (1A).
Next, the vibration sensor 10 transmits information about vibration including the calculated SI value to the management server 20 as transmission information (1B). The transmission information is sent to the management server 20 via the network 40 .
The management server 20 stores and accumulates the transmission information acquired from the plurality of vibration sensors 10 (1C).

Next, the management server 20 selects a set of vibration sensors 10 from among the plurality of vibration sensors 10 according to predetermined conditions (1D). Further, the management server 20 acquires point information of each of the vibration sensors 10 described above (1E).
The management server 20 then selects an object between the selected pair of vibration sensors 10 (1F).
Furthermore, the management server 20 notifies the terminal device 30 of the selected object (1G). The terminal device 30 displays, for example, information about the notified object.

Next, the detailed functional configuration and operation of the object selection system 1 of this embodiment will be described.

<Description of Functional Configuration of Object Selection System 1>
FIG. 3 is a block diagram showing a functional configuration example of the object selection system 1. As shown in FIG.
Here, among various functions of the object selection system 1, those related to the present embodiment are selected and illustrated.
The vibration sensor 10 includes a vibration detection unit 11 that detects vibration and a transmission unit 12 that transmits information to the outside.
The vibration detection unit 11 is, for example, the MEMS acceleration sensor described above, measures the acceleration of the vibration of an earthquake, and quantifies it as an SI value or the like.
Further, the transmission unit 12 transmits transmission information including information such as the numerical SI value to the management server 20 . The transmission unit 12 is, for example, a communication I/F, and transmits transmission information to the management server 20 via the network 40 .

The management server 20 includes a transmission/reception unit 21 that communicates with the outside, a storage unit 22 that stores transmission information sent from a plurality of vibration sensors 10, and a selection unit that selects a set of vibration sensors 10 based on the transmission information. 23, a location acquisition unit 24 that acquires location information of a plurality of vibration sensors 10, and a structure selection unit that selects a target object such as a structure based on the transmission information and location information of a selected set of vibration sensors 10. 25;

The transmission/reception unit 21 communicates with the plurality of vibration sensors 10 and the terminal device 30 to exchange predetermined information such as transmission information.
The storage unit 22 stores information acquired by the transmission/reception unit 21 .

The selection unit 23 selects a set of vibration sensors 10 from among the plurality of vibration sensors 10 based on the numerical values output by each of the plurality of vibration sensors 10 . Although the details will be described later, for example, the management server 20 selects a plurality of vibration sensors 10 that output larger SI values as a set of vibration sensors 10 . In addition, for example, the management server 20 selects, as a set of vibration sensors 10, those that output SI values whose SI value difference is greater than a predetermined threshold among a plurality of adjacent vibration sensors 10. FIG.

The location acquisition unit 24 acquires location information, which is information specifying locations where each of the selected set of vibration sensors 10 is installed. The point information can be acquired by pre-stored in association with the unique ID of each vibration sensor 10 . That is, since the vibration sensor 10 does not move, the unique ID of the vibration sensor 10 and the point information are associated and stored in the storage unit 22 . Then, the point information can be acquired from the storage unit 22 based on the unique ID information included in the transmission information. Alternatively, each vibration sensor 10 may acquire point information by GPS, include the point information in transmission information, and transmit the information, which may be acquired by the management server 20 .
The selection unit 23 and the location acquisition unit 24 can be regarded as an example of location information acquisition means.

The structure selecting unit 25 is an example of a structure selecting/acquiring unit. Select an object to
Here, the object is an object selected by the structure selection unit 25 and determined to be affected by vibration. Specifically, when a structure can be damaged by vibrations such as an earthquake, the structure selection unit 25 selects this structure as the object. Moreover, when a part of the structure can be damaged, the structure selection unit 25 can also select the part that can be damaged as the object.
Also, the position information is information indicating the position of the object, and has the same content as the point information. That is, the position information is, for example, information on the position of the object on the earth.

The transmitter/receiver 21 is, for example, a communication I/F. Also, the storage unit 22 is, for example, an auxiliary storage device such as a storage. Furthermore, each function of the selection unit 23, the point acquisition unit 24, and the structure selection unit 25 can be realized by, for example, a CPU.

The terminal device 30 includes a transmission/reception section 31 that transmits and receives information, a display section 32 that displays images, and an input section 33 that inputs information.

The transmitting/receiving unit 31 transmits/receives information to/from the management server 20 . The transmission/reception unit 31 is, for example, a communication I/F, and transmits/receives information to/from the management server 20 via the network 40 .

The display unit 32 displays images. The display unit 32 is, for example, a touch panel. In this case, the display unit 32 includes a display that displays various information and a position detection sheet that detects the position touched by a finger, stylus pen, or the like. As a means to detect the contact position, what kind of method is used, such as a resistive film method that detects based on the pressure caused by contact, or a capacitance method that detects based on the static electricity of the contacted object. good too.

The input unit 33 is an input mechanism for the user of the terminal device 30 to perform a predetermined operation.
For example, it is the touch panel mentioned above. In this case, the touch panel has the functions of both the display section 32 and the input section 33 . In other words, by displaying a notification from the management server 20 and touching the displayed screen, it is possible to start/end the dedicated application and perform operations on the dedicated application. Note that the input unit 33 is not limited to this, and may be configured by a keyboard, a mouse, or the like.

<Description of the operation of the object selection system 1>
Next, the operation of the object selection system 1 will be described in more detail.
FIG. 4 is a flow chart explaining the operation of the object selection system 1. As shown in FIG.
First, it is determined whether or not the vibration detector 11 of the vibration sensor 10 has detected vibration (step 101).
As a result, if no vibration is detected (No in step 101), the process returns to step 101.
On the other hand, when vibration is detected (Yes in step 101), the vibration detection unit 11 measures the vibration and calculates a numerical value such as the SI value (step 102).
Next, the vibration detection unit 11 creates transmission information including the calculated numerical value and transmits it to the management server 20 via the transmission unit 12 (step 103).

In the management server 20, the transmission information is received via the transmission/reception section 21, and the storage section 22 stores the transmission information (step 104).
Next, the selection unit 23 selects a set of vibration sensors 10 based on the numerical values included in the transmission information (step 105).
Then, the location information of the set of vibration sensors 10 selected by the location acquisition unit 24 is acquired from the storage unit 22, for example (step 106).
Furthermore, the structure selection unit 25 selects objects that are between the pair of vibration sensors 10 selected from the point information and that meet predetermined conditions (step 107).

Then, the transmitting/receiving section 21 transmits information about the selected object to the terminal device 30 as notification information (step 108).
In the terminal device 30 which received the notification information, the transmitting/receiving section 31 receives the notification information, and the display section 32 displays the contents thereof (step 109). At this time, the user who operates the terminal device 30 may input a receipt confirmation or the like through the input unit 33 and transmit it to the management server 20 .
Next, a more specific example of the operation of the object selection system 1 described above will be described.

[First Embodiment]
Here, first, the operation of the object selection system 1 according to the first embodiment will be described.
In the first embodiment, the vibration sensor 10 detects seismic vibration and outputs an SI value as a numerical value. Then, the management server 20 selects objects affected by earthquake vibration based on the SI values transmitted by the plurality of vibration sensors 10 . More specifically, the management server 20 selects structures that may be damaged by an earthquake as targets. Here, a method of creating a map representing the magnitude of earthquake vibration from the SI value and using the map will be described.

(Method using a map showing the magnitude of vibration)
FIG. 5 is a diagram showing a method of creating a map representing the magnitude of vibration and selecting a structure based on this map.
FIG. 5 shows an example of creating a map Ma showing the distribution of the magnitude of vibration based on the SI values transmitted by the plurality of vibration sensors 10. As shown in FIG.
The illustrated map Ma shows an example in which a map prepared in advance is used, and the distribution of the magnitude of vibration is superimposed and displayed on this map. The vibration magnitude distribution can be calculated by interpolating the SI values of the vibration sensors 10 based on the SI values transmitted by the vibration sensors 10 . In this map Ma, points with larger SI values are displayed in darker colors, and points with smaller SI values are displayed in lighter colors. Since the vibration sensors 10 can be installed densely as described above, a finer distribution can be calculated as the vibration distribution.

Also, on this map Ma, a white point 10T representing the point where the vibration sensor 10 is installed is displayed. In FIG. 5, the vibration sensors 10 selected by the selection unit 23 from among these vibration sensors 10 are indicated by black dots 10S. In this case, the selection unit 23 selects the vibration sensor 10 having a particularly large SI value compared to the surroundings. Here, the vibration sensors 10 that output SI values larger than the predetermined threshold are selected. Furthermore, in FIG. 5, the structure selection unit 25 displays the selected structure Tm1. The structure selection unit 25 selects a predetermined structure based on the map Ma. In this case, the structure selection unit 25 selects the structure Tm1 as an object located between the point information of the vibration sensors 10 having a particularly large SI value. In this case, since the area Ar where the vibration was particularly large can be found from the map Ma, a specific structure Tm1 within this area Ar is selected.

This structure Tm1 is selected from predetermined structures. Predetermined structures are listed in advance, for example. This list also includes location information for structures.
These structures are, for example, structures built according to old seismic standards. In other words, structures that are more susceptible to damage due to seismic vibrations are selected. They also include bridges, roads, and the like that are necessary to reach evacuation destinations such as public facilities. In other words, it is a structure that becomes unsuitable for going to an evacuation site if it is damaged by the vibrations of an earthquake. These structures are also important facilities as infrastructure, for example. Concretely, they are structures related to infrastructure facilities necessary for life such as energy facilities, water supply facilities, transportation facilities, and information facilities. In other words, it is a structure that may hinder daily life if it is damaged by the vibrations of an earthquake. Specifically, water pipes, railroad facilities, pipelines, and the like fall under this category.

The structure selection unit 25 refers to this list and determines whether or not these structures are located within the area Ar shown in FIG. 5 based on the positional information of the structures. If it is located, it is selected as the structure Tm1 on the map Ma. This map Ma is sent to the terminal device 30 as notification information and displayed on the terminal device 30 . The destination to which the map Ma is sent is, for example, the terminal device 30 installed in the municipal disaster prevention department, the fire department, the police station, or the like, or the terminal device 30 installed in the structure Tm1.

In the example described above, the structure Tm1 that can be damaged is selected as the object, but the object is not limited to such an artificial structure, and a natural object may be used as the object. For example, it is possible to select a location where a landslide may occur due to the vibration of an earthquake.
Also, in the above example, the structure Tm1 in the area Ar where the vibration was large was selected, but it is not limited to this. For example, in the outer edge portion Ar1 of the area Ar, when a structure exists in a place where the magnitude of vibration varies greatly, that is, when a structure exists across areas with different magnitudes of vibration, the structure may cause greater damage to Therefore, structures existing in such places may be selected.

[Second embodiment]
Next, a second embodiment of the operation of the object selection system 1 will be described.
In the second embodiment, the vibration sensor 10 detects seismic vibration and outputs an SI value as a numerical value. Then, based on the SI values transmitted by the plurality of vibration sensors 10, the management server 20 selects locations within the building that may have been damaged by the earthquake as objects.

(method using the difference between numbers)
FIG. 6(a) is a diagram showing a first example of a method of selecting locations that may have been damaged by an earthquake. Here, as described below, the difference in SI value output by the vibration sensor 10 is used.

FIG. 6(a) shows a case where gas pipes H1 to H3 are arranged in building Tm2. These gas pipes H1 to H3 are arranged, for example, on different floors of the building Tm2. Further, the gas pipes H1 to H3 have substantially the same length and the like, and have substantially the same structure. Further, gas pipes H1 to H3 are connected by gas pipes H4 to H6.
Vibration sensors 10H1 to 10H6 are installed as the vibration sensor 10 in the gas pipes H1 to H3, as shown in the figure. In this case, two vibration sensors 10 are installed for each of the gas pipes H1 to H3. Therefore, when an earthquake occurs, the vibration sensors 10H1 to 10H6 sense the vibrations of the gas pipes H1 to H3, respectively. Measure and output the SI value.

The management server 20 then calculates the difference in SI value between each of the vibration sensors 10H1 to 10H6. That is, since each of the gas pipes H1 to H3 has substantially the same structure, it is expected that the SI values will also be close values. However, if the SI value output from any one of the vibration sensors 10H1 to 10H6 is significantly different from the others, it is conceivable that the gas pipe to which this vibration sensor is attached is damaged. For example, if the SI values of the vibration sensors 10H1 and 10H2 are significantly different from those of the others, it is expected that the gas pipe H1 is damaged. For example, if the SI values of the vibration sensors 10H1 and 10H2 are significantly different from those of the others, it is expected that the gas pipe H1 is damaged. If the SI values of the vibration sensors 10H3 and 10H5 are significantly different from those of the others, it is expected that the gas pipe H5 is damaged.

In this case, the management server 20 selects multiple vibration sensors 10 installed in the same building as a set of vibration sensors 10 . Furthermore, the management server 20 selects this vibration sensor 10 when the difference in SI value differs from that of another vibration sensor 10 by a predetermined threshold or more. Then, it is determined that the gas pipe in which this vibration sensor 10 is installed may have been damaged by the earthquake. In this case, it can be said that the management server 20 selects a gas pipe as an object located between a plurality of adjacent vibration sensors 10 having a large difference between numerical values.

FIG. 6(b) is a diagram showing a second example of a method of selecting locations that may have been damaged by an earthquake. Here, the difference between the SI value output by the vibration sensor 10 and a predetermined value is used.

(Method of using the difference between a numerical value and a predetermined value)
Similar to FIG. 6(a), FIG. 6(b) shows a case where gas pipes H1 to H6 are arranged in the building Tm2. However, the gas pipes H1 to H3 have different lengths and different structures. Vibration sensors 10H1 to 10H6 are installed in the gas pipes H1 to H3 in the same manner as in FIG. 6(a).
The management server 20 compares the SI value between each of the vibration sensors 10H1 to 10H3 with the SI value expected to be originally output. The SI value expected to be output originally can be estimated from other devices such as seismometers installed in this area. However, if the SI value output from any one of the vibration sensors 10H1 to 10H6 is significantly different from the predicted SI value, it is conceivable that the gas pipe to which this vibration sensor is attached is damaged. For example, if the SI values of the vibration sensors 10H1 and 10H2 are significantly different from the predicted SI value, it is expected that the gas pipe H1 is damaged. If the SI values of the vibration sensors 10H3 and 10H5 are significantly different from the predicted SI values, it is expected that the gas pipe H5 is damaged.

In this case, the management server 20 selects multiple vibration sensors 10 installed in the same building as a set of vibration sensors 10 . Furthermore, the management server 20 selects this vibration sensor 10 when any of the SI values output from these vibration sensors 10 differs from the expected SI value by a predetermined threshold or more. Then, it is determined that the gas pipe in which this vibration sensor 10 is installed may have been damaged by the earthquake. In this case, it can be said that the management server 20 selects the gas pipe as an object located between a plurality of vibration sensors having a large difference between the numerical value and the predetermined numerical value.

[Third Embodiment]
Next, a third embodiment of the operation of the object selection system 1 will be described.
In the third embodiment, the vibration sensor 10 detects sudden accident vibrations and outputs maximum acceleration as a numerical value. Then, the management server 20 selects the place where the accident occurred as the object based on the maximum accelerations transmitted by the plurality of vibration sensors 10 . Here, the accident includes not only collisions between vehicles or ships, collisions of vehicles or ships with buildings, etc., but also explosions. It may also be a natural disaster such as a landslide.

(Method for Identifying the Location of an Accident)
FIGS. 7(a) and 7(b) are diagrams showing a method of selecting the place where the accident occurred based on the maximum acceleration.
Among them, FIG. 7(a) is a diagram showing the installation state of the vibration sensor 10. FIG. As illustrated, vibration sensors 10D1 to 10D5 are installed as the vibration sensor 10 on the road D. As shown in FIG. Vibration sensors 10D1 to 10D5 are installed along the road D at regular intervals. The vibration sensors 10D1 to 10D5 may be installed by being buried along the road D, or may be installed by being attached to utility poles, traffic lights, or the like.
When an accident occurs, vibrations are greater than when the vehicle is running normally. Any of the vibration sensors 10D1 to 10D5 detects maximum acceleration greater than a predetermined threshold. The maximum acceleration at this time is sent to the management server 20, and the management server 20 can determine that an accident has occurred.

FIG. 7(b) is a diagram showing the maximum acceleration output by the vibration sensors 10D1 to 10D5.
Among the vibration sensors 10D1 to 10D5, the maximum acceleration of the vibration sensors 10D2 and 10D3 exceeds the threshold. From this, it can be estimated that an accident has occurred between the vibration sensor 10D2 and the vibration sensor 10D3. The sensor 10 and the vibration sensor 10 that outputs the next largest maximum acceleration are selected. Then, it is estimated that an accident has occurred on the road D between the two. In this case, it can be said that the management server 20 selects the place where the accident occurred as the object based on the vibration caused by the accident.

[Fourth embodiment]
Next, a fourth embodiment of the operation of the object selection system 1 will be described.
In a fourth embodiment, vibration sensor 10 is installed in a structure to monitor vibration. Then, the vibration sensor 10 outputs the vibration acceleration as a numerical value. Furthermore, the management server 20 selects an object with a large fatigue among the structures based on the accelerations transmitted by the plurality of vibration sensors 10 . Here, "fatigue" refers to a phenomenon in which the strength of a structure decreases when the structure receives mechanical stress continuously or repeatedly. Among these, when it occurs in a structure made of metal, it is called metal fatigue, and it is particularly likely to be a problem. However, it is not limited to this, and may be composed of materials other than metal, such as resin, glass, and ceramics.

(Method using vibration mode)
Here, first, the case of obtaining the fatigue of a structure using vibration modes will be described.
8, 9(a)-(b), and 10(a)-(b) are diagrams showing a method of obtaining fatigue of a structure using vibration modes. Here, the case where the structure is a bridge will be described as an example.
Among them, FIG. 8 shows the installation state of the vibration sensor 10 .
In the illustrated example, the bridge K is a railway truss bridge. As the vibration sensor 10, vibration sensors 10K1 to 10K9 are installed. In this case, three vibration sensors 10 are installed on each of the bridge girders K1 to K3 of the bridge K, and these vibration sensors 10K1 to 10K9 detect vibration when a railway vehicle passes.

FIG. 9(a) shows a vibration waveform Wv obtained by any one of the vibration sensors 10K1 to 10K9. Here, the horizontal axis represents time and the vertical axis represents acceleration.
In this case, it indicates that the railway vehicle ran on the bridge K for at least 10 seconds.
FIG. 9(b) is the power spectrum Ps obtained based on the waveform Wv shown in FIG. 9(a). Here, the horizontal axis represents frequency and the vertical axis represents power.
As shown in the power spectrum Ps, peaks P1 and P2 are present at frequencies of 3.25 Hz and 6.35 Hz, respectively. These frequencies of 3.25 Hz and 6.35 Hz are the natural frequencies of bridge K. The former is sometimes called the natural frequency of the primary mode, and the latter is sometimes called the natural frequency of the secondary mode. It should be noted that there may be natural frequencies greater than the natural frequency of the second mode, and these are the natural frequencies of the third mode, the natural frequencies of the fourth mode, and so on in ascending order of frequency, but here, Not detected.

When fatigue accumulates in the bridge K, the natural frequency may change.
FIG. 10(a) is a diagram showing the relationship between the degree of fatigue and the natural frequency of the primary mode. FIG. 10(b) is a diagram showing the relationship between the degree of fatigue and the natural frequency of the secondary mode. Here, the horizontal axis represents the degree of fatigue, and the vertical axis represents the natural frequency.
As shown, in this case, as fatigue accumulates, both the natural frequencies of the first and second modes become smaller.
Therefore, since the degree of fatigue can be known from the natural frequency, the management server 20 can select an object with accumulated fatigue from the natural frequency. In this case, the vibration sensors 10K1 to 10K9 can determine the fatigue of the bridge girders K1 to K3 as objects. Moreover, since a plurality of vibration sensors are installed in the structure, even if the structure is large like the bridge K, it is possible to determine in which part of the structure fatigue is accumulated.
For example, when the vibration sensor 10K1 and the vibration sensor 10K2 detect that the change in the natural frequency shown in FIG. 10 is large, fatigue is accumulated in the main girder K1a between the vibration sensor 10K1 and the vibration sensor 10K2 is presumed.
In this case, the management server 20 selects the vibration sensor 10K1 and the vibration sensor 10K2 as a pair of vibration sensors 10 whose natural frequencies in the primary mode and the secondary mode have decreased by a predetermined threshold or more. Then, the management server 20 selects the main girder K1a as the object based on the vibration mode of the vibration detected by each of the plurality of vibration sensors 10 .

(Method of calculating and using stress)
Next, a case of obtaining fatigue of a structure from stress caused by vibration will be described. Here, the case where the structure is a bridge K similar to that shown in FIGS. 8 to 10 will be described as an example.
Here, first, the stress generated in the bridge girders K1 to K3 is calculated from the vibration waveform Wv shown in FIG. 9(a). This stress can be calculated by known methods such as frequency response analysis. Frequency response analysis is an analysis method for grasping the response when a load is repeatedly applied at a specified frequency.

FIG. 11 is a diagram showing a method of obtaining fatigue of a structure from stress caused by vibration. The horizontal axis represents the position where the vibration sensor 10 is installed on the bridge girders K1 to K3, and the vertical axis represents the stress applied to the main girders K1a to K3a of the bridge girders K1 to K3 at the position of the vibration sensor 10.
There is a correlation between the magnitude of stress and the degree of fatigue. In other words, when the applied stress is large, fatigue tends to accumulate. On the other hand, when the applied stress is small, fatigue is less likely to accumulate. Therefore, the degree of fatigue with respect to time can be estimated from the magnitude of stress. In this case, it is possible to know where fatigue is accumulated on the main girders K1a to K3a. In the case of this embodiment, since a plurality of vibration sensors 10 are installed in the structure, even if the structure is large like the bridge K, the calculation accuracy of the stress generated in each part is improved. Fatigue is particularly likely to accumulate when there is a location where stress concentration occurs where even greater stress is applied. In the example shown in FIG. 11, the stress is greater at the positions of the vibration sensor 10K1 and the vibration sensor 10K2. Then, it can be estimated that fatigue is accumulated at the positions of the vibration sensor 10K1 and the vibration sensor 10K2. In this case, it is presumed that fatigue is accumulated in the main girder K1a.
In this case, the management server 20 selects the vibration sensor 10K1 and the vibration sensor 10K2 corresponding to the location where the stress is large as the pair of vibration sensors 10. FIG. Then, the management server 20 selects the main girder K1a as the object based on the stress caused by the vibration detected by each of the plurality of vibration sensors 10. FIG.
Thus, in the fourth embodiment, it can be said that the management server 20 selects a structure with accumulated fatigue as an object based on vibration.

According to the target object selection system 1 described in detail above, it is possible to more easily select target objects that will be damaged due to vibration such as an earthquake. In addition, it is not necessary to use an expensive seismometer, and by using a simpler vibration sensor 10, for example, the vibration sensor 10 can be installed for each building or each member constituting a structure. measurement points can be increased. As a result, the selection of objects becomes easier.

In the above-described first to fourth embodiments, methods for selecting target objects have been described, but each method can also be applied to other embodiments. For example, in the fourth embodiment, in order to select an object with a large fatigue of the structure, a method of using vibration mode and stress was shown. It can be applied to select locations in a building that may have been damaged by an earthquake.

<Explanation of the program>
Here, the processing performed by the management server 20 according to the present embodiment described above is prepared as a program such as application software, for example. This processing is realized through the cooperation of software and hardware resources. That is, a CPU (not shown) inside a computer provided in the management server 20 executes a program for realizing each function described above to realize each function.

Therefore, in the present embodiment, the processing performed by the management server 20 is to calculate the numerical value output by each of the plurality of vibration sensors 10 that output information including the numerical value indicating the magnitude of vibration at the installation point to the computer. Based on this, a set of vibration sensors is selected from among the plurality of vibration sensors 10, and a point information acquisition function for acquiring point information that is information specifying the points where each of the selected set of vibration sensors is installed. and a structure selection function that selects an object located between points related to the point information acquired by the point information acquisition function from among the objects associated with the position information. can also be captured.

It should be noted that the program that implements the present embodiment can be provided not only by communication means but also by being stored in a recording medium such as a CD-ROM.

Although the present embodiment has been described above, the technical scope of the present invention is not limited to the range described in the above embodiment. It is clear from the scope of claims that various modifications and improvements to the above embodiment are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1... Object selection system, 10... Vibration sensor, 20... Management server, 21... Transmission-and-reception part, 22... Storage part, 23... Selection part, 24... Point acquisition part, 25... Structure selection part, 30... Terminal device

Claims (9)

a plurality of vibration sensors that output information including a numerical value indicating the magnitude of vibration at an installed point;
selecting a set of vibration sensors from among the plurality of vibration sensors based on a predetermined condition based on the numerical value output by each of the plurality of vibration sensors; and selecting the selected set of vibration sensors Point information acquisition means for acquiring point information that is information specifying the position on the earth of the point where each of is installed;
The structure located between the points associated with the point information acquired by the point information acquisition means from among a list including at least one of structures and natural objects associated with position information indicating positions on the earth. or a structure selection means for selecting the natural object ;
An object selection system comprising: 2. The structure selection means according to claim 1, wherein the structure selection means creates a map showing the distribution of the magnitude of vibration based on the numerical values, and selects the structure or the natural object based on the map. Object selection system. The vibration sensor is installed in a gas meter that measures the amount of gas used, normally outputs information on the measured amount of gas used, and outputs the numerical value when an earthquake vibration is detected. 2. The object selection system according to claim 1. 2. The object selection system according to claim 1, wherein said structure selection means selects said structure or said natural object positioned between a plurality of adjacent vibration sensors having a large difference between said numerical values. . 2. The object according to claim 1, wherein said structure selecting means selects said structure or said natural object positioned between a plurality of vibration sensors having a large difference between said numerical value and a predetermined numerical value. selection system. 2. The object selection system according to claim 1, wherein said structure selection means selects said structure or said natural object affected by vibration of an earthquake. 7. The object selection system according to claim 6 , wherein said structure selection means selects a structure that may be damaged by an earthquake as said structure . Based on the numerical value output by each of a plurality of vibration sensors that output information including a numerical value indicating the magnitude of vibration at an installed point, one of the plurality of vibration sensors is selected based on a predetermined condition. Point information acquisition means for selecting a set of vibration sensors and acquiring point information, which is information specifying the position on the earth of the point where each of the selected set of vibration sensors is installed;
The structure located between the points associated with the point information acquired by the point information acquisition means from among a list including at least one of structures and natural objects associated with position information indicating positions on the earth. or a structure selection means for selecting the natural object ;
An object selection device comprising: to the computer,
Based on the numerical value output by each of a plurality of vibration sensors that output information including a numerical value indicating the magnitude of vibration at an installed point, one of the plurality of vibration sensors is selected based on a predetermined condition. a location information acquisition function for selecting a set of vibration sensors and acquiring location information, which is information specifying the position on the earth of the location where each of the selected set of vibration sensors is installed;
The structure located between the points related to the point information acquired by the point information acquisition function from among a list including at least one of structures or natural objects associated with position information indicating a position on the earth. Or a structure selection function for selecting the natural object ,
program to make it happen.

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