Gas meter management device, gas meter management method, and gas meter management program

Abstract

To provide a gas meter management device capable of appropriately adjusting call timing from a gas meter to a management center.SOLUTION: A gas meter management device 100 includes a sensor information acquisition section 101, a sensor information determination section 112, a damage evaluation value calculation section 113, a threshold determination section 114, and a call control section 115. The sensor information acquisition section 101 acquires detection information being the information detected by sensors and including acceleration sensor information, pressure sensor information, and ultrasonic sensor information. Based on the detection information, the sensor information determination section 112 determines a damage state with respect to a gas meter 10. Based on the determination result of the sensor information determination section, the damage evaluation value calculation section 113 calculates a damage evaluation value indicating an emergency degree with respect to the call of damage information. The threshold determination section 114 determines whether the damage evaluation value is equal to or more than a threshold. The call control section 115 originates the damage information to an outer part when the damage evaluation value is equal to or more than the threshold.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a gas meter management device, a gas meter management method, and a gas meter management program. [Background technology]

[0002] Conventionally, gas meters have been proposed that use acceleration sensors to detect shaking caused by earthquakes and the like and transmit the detected information to a management center via a communication function. However, there are many gas meters within the jurisdiction of a management center, and in the event of a disaster such as an earthquake, the amount of information sent from the gas meters to the management center increases. Patent Document 1 discloses a gas meter that sends data related to shaking during an earthquake to an external party (the management center). The gas meter disclosed in Patent Document 1 adjusts the timing of calls to the management center depending on the detected seismic intensity and the tilt of the gas meter, preventing communication failures caused by excessive communication traffic. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-8487 Summary of the Invention [Problem to be solved by the invention]

[0004] The gas meter disclosed in Patent Document 1 adjusts the timing of calls based on the seismic intensity of the earthquake and the tilt information of the gas meter. However, when a disaster such as an earthquake occurs, a gas leak or fire may occur, regardless of the seismic intensity or the degree of tilt of the gas meter, and an emergency such as shutting off the gas supply to the gas meter may be required. On the other hand, even if the seismic intensity or the degree of tilt of the gas meter is high, there may be cases where no problem has occurred near the gas meter and there is no need to urgently call the management center for information, or where there is no need to make a call at all. In other words, there is a need for a gas meter that detects information related to the state of the gas meter and makes calls for information requiring emergency information, while suppressing non-emergency communications and preventing congestion of communication paths.

[0005] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide a gas meter management device that is capable of appropriately adjusting the timing of calls from the gas meter to the management center. [Means for solving the problem]

[0006] A gas meter management device according to an embodiment of the present invention includes a sensor information acquisition unit that acquires detection information detected by sensors, the detection information including acceleration sensor information related to the vibration of the gas meter, pressure sensor information related to the gas pressure in the pipe through which the gas flows, and ultrasonic sensor information related to the ultrasonic signal in the pipe; a sensor information determination unit that determines the damage status of the gas meter based on the detection information acquired by the sensor information acquisition unit; a damage assessment value calculation unit that calculates a damage assessment value indicating the urgency of sending damage information to the outside based on the result determined by the sensor information determination unit; a threshold determination unit that determines whether the damage assessment value is equal to or greater than a threshold value stored in advance in a memory unit; and a call control unit that sends damage information to the outside if the damage assessment value is equal to or greater than the threshold value.

[0007] A gas meter management method according to another aspect of the present invention is a gas meter management method executed by a computer, which acquires detection information detected by sensors, including acceleration sensor information relating to the vibration of the gas meter, pressure sensor information relating to the gas pressure in the pipe through which the gas flows, and ultrasonic sensor information relating to the ultrasonic signal in the pipe, determines the damage status of the gas meter based on the detection information, calculates a damage assessment value indicating the urgency of sending damage information to the outside based on the result of the damage status determination, determines whether the damage assessment value is equal to or greater than a threshold value stored in advance in a memory unit, and sends the damage information to the outside if the damage assessment value is equal to or greater than the threshold value.

[0008] A gas meter management program according to another aspect of the present invention causes a computer to execute the following steps: acquiring detection information detected by sensors, the detection information including acceleration sensor information relating to the vibration of the gas meter, pressure sensor information relating to the gas pressure in the pipe through which the gas flows, and ultrasonic sensor information relating to the ultrasonic signal in the pipe; determining the damage status of the gas meter based on the detection information; calculating a damage assessment value indicating the urgency of sending damage information to the outside based on the result of the damage status determination; determining whether the damage assessment value is equal to or greater than a threshold value stored in advance in a memory unit; and sending the damage information to the outside if the damage assessment value is equal to or greater than the threshold value. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a gas meter management device that can appropriately adjust the timing of calls from the gas meter to the management center. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram showing a schematic configuration of a gas meter according to an embodiment of the present invention; [Figure 2] 1 is a block diagram showing a configuration of a gas meter management device according to an embodiment of the present invention. [Figure 3]2 is a schematic diagram for explaining an ultrasonic sensor of the gas meter according to the embodiment; FIG. [Figure 4] FIG. 3 is a block diagram for explaining a function of a sensor information determination unit according to the embodiment. [Figure 5] 10A and 10B are diagrams for explaining information used in a sensor information determination unit; [Figure 6] FIG. 10 is a diagram for explaining a damage determination value according to the present embodiment. [Figure 7] FIG. 4 is a diagram showing an example of data stored in a damage information DB according to the present embodiment. [Figure 8] 5 is a flowchart illustrating an example of processing performed by the gas meter management device according to the present embodiment. [Figure 9] 10 is a flowchart illustrating an example of a fire determination process according to the present embodiment. [Figure 10] 10 is a flowchart illustrating an example of a house collapse determination process according to the present embodiment. [Figure 11A] 10 is a flowchart illustrating an example of a piping determination process according to the present embodiment. [Figure 11B] 10 is a flowchart showing an example of processing in the piping determination processing according to the present embodiment when there is a gas flow rate at the time of earthquake determination. [Figure 11C] 10 is a flowchart showing an example of processing in the piping determination processing according to the present embodiment when there is no gas flow rate when an earthquake is determined. [Figure 11D] 10 is a flowchart showing an example of processing in the piping determination processing according to the present embodiment when there is no gas flow rate when an earthquake is determined. [Figure 12] 10 is a flowchart illustrating an example of a ground inclination determination process according to the present embodiment. [Figure 13] 10 is a flowchart illustrating an example of a furniture underlay determination process according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The gas meter management device 100 according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the sake of explanation and may differ from the actual proportions. In addition, in the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

[0012] (Configuration of gas meter 10) FIG. 1 is a block diagram showing the configuration of a gas meter 10 according to this embodiment. The gas meter 10 is installed in the homes of gas consumers who use city gas, LP gas, or other gases, and is a device for measuring the amount of gas used. The overall shape of the gas meter 10 is box-shaped. The gas meter 10 also includes piping 20 through which gas flows. One end of the piping 20 is connected to a gas inlet 22a to which one end of a gas pipe is connected. Meanwhile, the other end of the piping 20 is connected to a gas outlet 22b to which the other end of the gas pipe is connected.

[0013] The gas meter 10 includes a pressure sensor 300 that measures the pressure inside the pipe 20. The gas meter 10 also includes an ultrasonic sensor 400 that detects information for measuring the volume and temperature of gas. The gas meter 10 also includes an acceleration sensor 500 that measures an acceleration value corresponding to vibrations such as those caused by an earthquake.

[0014] The gas meter 10 also includes a shutoff valve 21 that is installed in the piping 20 and whose opening and closing is electromagnetically controlled based on instructions from the gas meter management device 100. The shutoff valve 21 can shut off the flow of gas in the piping 20 by closing its valve body. On the other hand, the shutoff valve 21 can allow gas to flow in the piping 20 by opening its valve body.

[0015] Furthermore, the gas meter 10 includes a gas meter management device 100 that processes information obtained from various sensors included in the gas meter 10 and controls the operation of each component element.

[0016] The gas meter management device 100 includes a control unit 110, a memory unit 120, a pressure sensor IF130, an ultrasonic sensor IF140, an acceleration sensor IF150, a shutoff valve IF160, a communication IF170, an input / output IF180, and a display unit IF190. Details of the control unit 110, the memory unit 120, the pressure sensor IF130, the ultrasonic sensor IF140, and the acceleration sensor IF150 will be described later.

[0017] The shutoff valve IF160 is a component (interface) for controlling the opening and closing of the shutoff valve 21. The shutoff valve IF160 closes the valve element of the shutoff valve 21 in response to an instruction from the control unit 110, thereby shutting off the flow of gas in the piping 20. On the other hand, the shutoff valve IF160 opens the valve element of the shutoff valve 21 in response to an instruction from the control unit 110, thereby allowing gas to flow in the piping 20.

[0018] The communication IF 170 is a component for communicating with a management center based on a signal from the control unit 110. The gas meter management device 100 communicates with an external management center connected via a network via the communication IF 170. The network that enables communication between the gas meter management device 100 and the management center is a wide-area communication network that allows mutual communication, and is configured, for example, by a carrier network such as a mobile phone network, or the Internet.

[0019] The input / output IF 180 is, for example, a component that allows a user to exchange data with the gas meter management device 100. The user can configure the gas meter 10 or the gas meter management device 100 via the input / output IF 180. The user can also obtain information from the gas meter 10 or the gas meter management device 100 via the input / output IF 180.

[0020] The display unit IF190 is an interface for controlling a display unit (not shown) provided in the gas meter 10 or connected to the gas meter 10. The display unit displays the amount of gas used and the like on the display unit (not shown) based on a signal from the control unit 110 via the display unit IF190. The display unit may also display information to that effect, for example, when it detects an earthquake of a predetermined seismic intensity or higher, or when it has shut off gas supply due to an earthquake. Furthermore, the display unit may also display data stored in the memory unit 120 as appropriate.

[0021] (Functions and Configuration of Gas Meter Management Device 100) Next, a description will be given of the functions and configuration of the gas meter management device 100. FIG.

[0022] The sensor information acquisition unit 101 is configured to include a pressure sensor IF 130, an ultrasonic sensor IF 140, and an acceleration sensor IF 150. Specifically, the sensor information acquisition unit 101 acquires acceleration sensor information related to the vibration of the gas meter, which is information detected by various sensors. The sensor information acquisition unit 101 also acquires pressure sensor information related to the pressure of the gas in the pipe 20 through which the gas flows. The sensor information acquisition unit 101 also acquires ultrasonic sensor information related to the ultrasonic signal in the pipe 20. Information including the acceleration sensor information, pressure sensor information, and ultrasonic sensor information corresponds to detection information. In this embodiment, the ultrasonic sensor information related to the ultrasonic signal includes the propagation time of the ultrasonic wave and the gain (amplitude value) of the ultrasonic wave.

[0023] The pressure sensor IF 130 acquires pressure sensor information from inside the pipe 20 detected by a pressure sensor 300 that detects the pressure inside the pipe 20 .

[0024] The ultrasonic sensor IF 140 acquires ultrasonic sensor information related to the ultrasonic signal detected by the ultrasonic sensor 400. In this embodiment, the information related to the ultrasonic signal includes the propagation time of the ultrasonic wave and the gain (amplitude value) of the ultrasonic wave. The propagation time of the ultrasonic wave detected by the ultrasonic sensor 400 is used when measuring the flow rate (passing volume) of the gas in the flow rate calculation unit 111 described below. The propagation time of the ultrasonic wave is also used when measuring the temperature of the gas in the sensor information determination unit 112.

[0025] 3 is a schematic diagram illustrating the propagation time of ultrasonic waves in the gas pipe 20 measured by the ultrasonic sensor 400. In this embodiment, the ultrasonic sensor 400 is composed of an upstream ultrasonic sensor 400a and a downstream ultrasonic sensor 400b, as shown in FIG. 3. In the ultrasonic sensor 400, the ultrasonic waves transmitted from the upstream ultrasonic sensor 400a are received by the downstream ultrasonic sensor 400b, and the propagation time is measured. Similarly, the ultrasonic waves transmitted from the downstream ultrasonic sensor 400b are received by the upstream ultrasonic sensor 400a, and the propagation time is measured.

[0026] The acceleration sensor IF 150 acquires acceleration sensor information, which is an acceleration value corresponding to vibrations such as an earthquake applied to the acceleration sensor 500. The detection method of the acceleration sensor 500 does not limit the configuration of this embodiment. For example, if the acceleration sensor 500 uses a piezoresistance element, the acceleration signal detected by the acceleration sensor 500 is sent to the control unit 110 as acceleration data via a filter or the like that extracts a predetermined component.

[0027] The control unit 110 may be configured as, for example, a general-purpose microcomputer. In this case, a computer program for causing the microcomputer to function as the gas meter management device 100 may be installed in the microcomputer. By executing the computer program, the microcomputer functions as multiple information processing circuits provided in the gas meter management device 100. Furthermore, the control unit 110 may realize the multiple information processing circuits provided in the gas meter management device 100 by software, or it is also possible to provide dedicated hardware to configure the information processing circuits. Furthermore, the multiple information processing circuits may be configured as separate hardware.

[0028] Specifically, the control unit 110 has, as its functions, a flow rate calculation unit 111, a sensor information determination unit 112, a damage assessment value calculation unit 113, a threshold value determination unit 114, and a call control unit 115. The control unit 110 also operates based on a program stored in the storage unit 120, and executes the functions of the flow rate calculation unit 111, the sensor information determination unit 112, the damage assessment value calculation unit 113, the threshold value determination unit 114, and the call control unit 115. The program is not limited to being stored in the storage unit 120, and may be stored in, for example, a read-only memory (ROM) (not shown) within the gas meter management device 100.

[0029] As shown in Fig. 2, the storage unit 120 stores information included in a flow rate information DB 121 (DB: Database) and a damage information DB 122 as data. Note that there may be one or more storage units 120 storing these pieces of data. For example, a single storage unit 120 may be configured to store the data in separate areas. Alternatively, the data may be distributed and stored in multiple storage devices installed in physically separate locations.

[0030] The flow rate calculation unit 111 calculates the flow rate of gas in the piping 20 based on the propagation time of the ultrasonic sensor information detected by the ultrasonic sensor 400. Specifically, the flow rate calculation unit 111 calculates the flow rate of gas based on the difference between the propagation times detected by the upstream ultrasonic sensor 400a and the downstream ultrasonic sensor 400b. When gas is flowing, ultrasonic waves from the upstream ultrasonic sensor 400a to the downstream ultrasonic sensor 400b flow in the forward direction, so the propagation time is shorter than when no gas is flowing. On the other hand, when gas is flowing, ultrasonic waves from the downstream ultrasonic sensor 400b to the upstream ultrasonic sensor 400a flow in the reverse direction, so the propagation time is longer than when no gas is flowing. The flow rate calculation unit 111 calculates the flow rate of gas in the piping 20 using this difference in propagation time. The flow rate calculation unit 111 also stores the calculated gas flow rate in the flow rate information DB 121.

[0031] The method of calculating the gas flow rate based on ultrasonic sensor information has almost no pressure loss compared to the general membrane type flow rate calculation, and can also calculate the flow rate appropriately for various piping conditions during disasters, etc. Furthermore, the method of calculating the gas flow rate based on ultrasonic sensor information has a simple structure with only one set of ultrasonic sensors 400 in the fluid flow, which allows for miniaturization.

[0032] The sensor information determination unit 112 determines the damage status of the gas meter 10 based on the information (detection information) acquired by the sensor information acquisition unit 101. Specifically, the sensor information determination unit 112 determines the damage status in an earthquake determination unit 112a, a fire determination unit 112b, a house collapse determination unit 112c, a piping determination unit 112d, a ground inclination determination unit 112e, and a furniture undermining determination unit 112f shown in FIG.

[0033] Each of these determination units determines the damage status of the gas meter 10 based on the data acquired by the sensor information acquisition unit 101. FIG. 5 is a diagram showing the sensor information and flow rate information used by each determination unit. Furthermore, the sensor information determination unit 112 calculates the sum of the determination values ​​for the damage status determined by each determination unit. Specifically, the sensor information determination unit 112 uses the determination values ​​for each damage shown in FIG. 6 to calculate the sum of the determination values ​​for the determined meter damage.

[0034] The earthquake determination unit 112a determines whether or not an earthquake has occurred based on acceleration sensor information from the acceleration sensor 500. Specifically, the earthquake determination unit 112a determines that an earthquake has occurred when the magnitude of the SI (Spectral Intensity) value, which is calculated by time-integrating the acceleration value detected by the acceleration sensor 500, is equal to or greater than a specified value.

[0035] The SI value here is a numerical representation of the degree of damage caused to a typical building by an earthquake. Specifically, the acceleration caused by the earthquake is input and a response analysis is performed, and the average velocity response is calculated based on a specific range of natural periods to detect earthquake damage. The unit of the SI value is kine = cm / s.

[0036] As shown in Fig. 5, the fire detection unit 112b measures the gas temperature and determines whether or not a fire has occurred based on ultrasonic sensor information (propagation time information) related to ultrasonic waves from the ultrasonic sensor 400. If a fire occurs, the heat of the fire will cause the ambient temperature of the gas meter 10 and the temperature inside the pipes to rise, so it is possible to determine whether or not a fire has occurred by calculating the temperature from the propagation time of the ultrasonic waves after an earthquake has been detected. The propagation time of ultrasonic waves is inversely proportional to the temperature of the gas that serves as the medium, and the propagation time becomes shorter as the temperature rises.

[0037] In this embodiment, the temperature calculated by the fire detection unit 112b is calculated using the following formula (1). Here, T represents the gas temperature. Furthermore, L represents the distance between the upstream ultrasonic sensor 400a and the downstream ultrasonic sensor 400b. Furthermore, t1 and t2 represent the propagation time from the upstream ultrasonic sensor 400a to the downstream ultrasonic sensor 400b and the propagation time from the downstream ultrasonic sensor 400b to the upstream ultrasonic sensor 400a, respectively. Furthermore, M represents the average molecular weight of the gas. k represents the specific heat ratio of the gas. Furthermore, R represents the gas constant.

number

[0038] If the gas temperature T rises by 5°C or more in 4 minutes, it can be said that there is an abnormal heat source, and therefore the fire determination unit 112b determines that a fire has occurred. Details of the fire determination process in the fire determination unit 112b will be explained later using the flowchart shown in Fig. 9.

[0039] As shown in Fig. 5, the house collapse determination unit 112c determines whether or not the house will collapse due to the occurrence of an earthquake, based on information from the acceleration sensor 500, the ultrasonic sensor 400, and the pressure sensor 300. If a house collapses due to an earthquake, the installed gas meter 10 may also collapse. Furthermore, even if there is no problem with the gas meter 10 itself, it is possible that the gas pipe connecting the house may bend or break due to the occurrence of an earthquake.

[0040] The house collapse determination unit 112c first estimates the state of the house based on the tilt angle of the gas meter 10. If the gas meter 10 itself detects a large tilt immediately after an earthquake, it can be assumed that the earthquake caused the collapse of the house or other structure, resulting in the gas meter itself falling over. The tilt angle of the gas meter 10 can be calculated from the difference between the triaxial acceleration value at the time of initial installation and the triaxial acceleration value in a stationary state after the earthquake. Collapse is determined if the tilt angle of the gas meter 10 increases by 15 degrees or more after the earthquake. On the other hand, it is also possible that a house may collapse, but a gas meter 10 installed at a distant location may be unaffected. Therefore, house collapse is estimated based on the damage status of the gas pipe by monitoring changes in gas flow rate, ultrasonic gain, or pressure in the piping 20. Details of the house collapse determination process performed by the house collapse determination unit 112c will be described later using the flowchart shown in FIG. 10.

[0041] As shown in FIG. 5, the piping determination unit 112d determines whether there is a rupture or gas leak in the piping 20 based on the ultrasonic sensor 400, the pressure sensor 300, and the gas flow rate in the piping stored in the flow rate information DB. Even under normal circumstances, if the gas meter 10 continues to display a very low flow rate for several days, or if the gas flow rate is stopped and no increase in pressure is observed for several days, the unit 112d determines that a gas leak has occurred and issues a warning. This piping determination process for the gas meter 10 under normal circumstances is set to last several days to one month. If this piping determination process is not performed for about one month in the event of an earthquake, a dangerous situation will continue. Therefore, the piping determination process in this embodiment is executed to significantly shorten the time from an earthquake determination to a piping determination. Details of the piping determination process in the piping determination unit 112d will be described later using the flowcharts shown in FIGS. 11A to 11D.

[0042] As shown in FIG. 5, the ground inclination determination unit 112e determines whether or not ground inclination has occurred based on acceleration sensor information detected by the acceleration sensor 500. Normally, ground subsidence after an earthquake occurs some time after the earthquake, and the state of the ground gradually propagates to the building area. Therefore, the ground inclination determination unit 112e in this embodiment sets a monitoring period after determining that an earthquake has occurred, and determines that ground inclination has occurred if the tilt angle of the gas meter 10 gradually increases. Details of the ground inclination determination process in the ground inclination determination unit 112e will be described later using the flowchart shown in FIG. 12.

[0043] As shown in FIG. 5, the furniture under-cover determination unit 112f determines whether a piece of furniture has been crushed based on the flow rate information from the flow rate information DB 121. Even if an earthquake does not directly cause damage, a resident may be crushed under furniture and unable to move. Therefore, if gas was being used before the earthquake but gas use has not resumed several days after the earthquake, the furniture under-cover determination unit 112f determines that the resident is crushed under furniture, assuming that some abnormality has occurred and that the resident is unable to move. If the furniture under-cover determination unit 112f determines that an earthquake has occurred when there was a flow rate detected at least once within 24 hours before the earthquake, but has not detected a flow rate detected at all within 48 hours, the furniture under-cover determination unit 112f determines that a piece of furniture has been crushed. Details of the furniture under-cover determination process performed by the furniture under-cover determination unit 112f will be described later using the flowchart shown in FIG. 13.

[0044] The damage assessment value calculation unit 113 calculates a damage assessment value indicating the level of a call to the outside based on the result of the determination by the sensor information determination unit 112. Specifically, the damage assessment value calculation unit 113 calculates the earthquake damage assessment value based on the following formula (2). Note that in formula (2), the damage assessment value is indicated as an "assessment value." The SI value is the SI value at the time of the earthquake, and the judgment value and tilt angle are judgment value and tilt angle corresponding to the elapsed time. The value "1.0" in formula (2) is a value for assigning weight to the elapsed time. In other words, this "1.0" causes the damage assessment value to gradually increase with each elapsed time, and after a certain time has passed, it will reach the call level. In other words, the damage assessment value indicates the urgency of a call for damage information to the outside (management center), and the higher the damage assessment value, the higher the urgency of the call. Evaluation value = judgment value + elapsed time × {1.0 + (SI value / 100) + (tilt angle / 10)} (2)

[0045] Furthermore, the damage assessment value calculation unit 113 stores each parameter used in calculating the damage assessment value and the calculated damage assessment value in the damage information DB 122. Fig. 7 shows examples of the judgment value, elapsed time, SI value at the time of the earthquake occurrence, tilt angle, and damage assessment value stored in the damage information DB 122.

[0046] The threshold determination unit 114 determines whether the damage assessment value calculated by the damage assessment value calculation unit 113 is equal to or greater than a threshold. The threshold determination unit 114 also stores the determination result in the damage information DB 122. In this embodiment, when the threshold determination unit 114 determines that the damage assessment value calculated by the damage assessment value calculation unit 113 is equal to or greater than the threshold, the threshold determination unit 114 determines that the urgency is high and that it is time to make a call, and stores this information in the damage information DB 122. In the example shown in FIG. 7, when the threshold determination unit 114 determines that it is time to make a call, a circle indicating that it is time to make a call is stored in the call timing column of the damage information DB 122.

[0047] The example shown in FIG. 7 shows the change in the damage assessment value over time when a gas pipe break (downstream of the meter) (determination value: 15) occurs. For example, in the example shown in FIG. 7, when the elapsed time is "0," the damage assessment value is calculated as "15 + 0 = 15" using the above-mentioned formula (2). In this case, the threshold determination unit 114 compares this damage assessment value "15" with the threshold value "30" and determines that it is not time to make a call because the damage assessment value is not equal to or greater than the threshold value. On the other hand, in the example shown in FIG. 7, when the elapsed time is "6," the damage assessment value is calculated as "15 + 6 × 2.5 = 30" using the above-mentioned formula (2). In this case, the threshold determination unit 114 compares this damage assessment value "30" with the threshold value "30" and determines that it is time to make a call because the damage assessment value is equal to or greater than the threshold value, and stores this information in the damage information DB 122.

[0048] The call control unit 115 issues a call to the management center via the communication IF 170 to transmit damage information to the outside when the damage assessment value is equal to or greater than the threshold. Specifically, when information indicating that it is a call timing is stored in the call timing stored in the damage information DB 122, the call control unit 115 issues a call to the management center via the communication IF 170.

[0049] (Outline of processing flow of gas meter management device 100) Next, the flow of processing in the gas meter management device 100 will be shown using the flowcharts shown in Figs. 8 to 13. The series of operations of the gas meter management device 100 shown in the flowcharts of Figs. 8 to 13 starts when the gas meter management device 100 is started, and ends when the operation is completed. In addition, the processing in the flowcharts shown in Figs. 8 to 13 also ends when the power is turned off or an interrupt occurs to end the processing. In addition, in the explanation of the flowcharts below, the same content as that described in the explanation of the gas meter 10 and the gas meter management device 100 above will be omitted or simplified.

[0050] FIG. 8 is a flowchart showing the overall flow of the processing of the gas meter management device 100.

[0051] In step S801, the earthquake determination unit 112a performs earthquake determination processing. The earthquake determination unit 112a determines whether or not an earthquake has occurred based on information from the acceleration sensor 500. Specifically, the earthquake determination unit 112a determines that an earthquake has occurred when the magnitude of the SI value obtained by time-integrating the acceleration value detected by the acceleration sensor 500 is equal to or greater than a specified value.

[0052] In step S802, the earthquake determination unit 112a determines whether or not an earthquake has occurred in the earthquake determination process in step S801. If the earthquake determination unit 112a determines in step S802 that an earthquake has occurred (step S802: YES), the process proceeds to step S803. On the other hand, if the earthquake determination unit 112a determines in step S802 that an earthquake has not occurred (step S802: NO), the process ends.

[0053] In step S803, the fire determination unit 112b determines whether or not a fire has occurred. Specifically, the fire determination unit 112b performs a subroutine process for fire determination shown in Fig. 9. The subroutine process for fire determination shown in Fig. 9 will be described later.

[0054] In step S804, the house collapse determination unit 112c determines whether or not the house has collapsed. Specifically, the house collapse determination unit 112c performs a subroutine process for determining house collapse shown in Fig. 10. The subroutine process for determining house collapse shown in Fig. 10 will be described later.

[0055] In step S805, the piping determination unit 112d determines the state of the piping. Specifically, the piping determination unit 112d performs a subroutine process for piping determination shown in Figures 11A to 11D, and determines whether or not there is a rupture in the piping and / or a gas leak from the piping. The subroutine process for piping determination shown in Figures 11A to 11D will be described later.

[0056] In step S806, the ground inclination determination unit 112e determines whether the ground has inclined. Specifically, the ground inclination determination unit 112e performs a subroutine process for determining ground inclination shown in Fig. 12. The subroutine process for determining ground inclination shown in Fig. 12 will be described later.

[0057] In step S807, the furniture underlay determination unit 112f determines whether or not the object has been underlay by furniture. Specifically, the furniture underlay determination unit 112f performs a subroutine process for determining whether the object has been underlay by furniture shown in Fig. 13. The subroutine process for determining whether the object has been underlay by furniture shown in Fig. 13 will be described later.

[0058] In step S808, the damage assessment value calculation unit 113 calculates a damage assessment value based on the result of the determination made by the sensor information determination unit 112. Specifically, for each damage determined to have occurred, the damage assessment value calculation unit 113 calculates a damage assessment value based on the total value of the determination values ​​for each damage related to the gas meter shown in Fig. 6, using the above-mentioned formula (2). That is, the damage assessment value calculation unit 113 calculates the damage assessment value based on the total value of the determination values, the elapsed time, the SI value, and the tilt angle.

[0059] In step S809, the threshold determination unit 114 compares the damage assessment value calculated by the damage assessment value calculation unit 113 with a threshold value previously stored in the storage unit 120, and determines whether it is time to make a call. In this embodiment, if the threshold determination unit 114 determines that the damage assessment value is equal to or greater than the threshold value, it determines that it is time to make a call, and stores the determination result in the damage information DB 122. In the example shown in FIG. 7, when the elapsed time is 6 hours, the damage assessment value is equal to or greater than the threshold value, and at this timing, a circle indicating that it is time to make a call is stored in the column indicating whether it is time to make a call.

[0060] In step S810, the call control unit 115 determines whether it is time to make a call based on the information stored in the damage information DB 122. In step S810, if the call control unit 115 determines that it is time to make a call (step S810: YES), the process proceeds to step S811. On the other hand, in step S810, if the call control unit 115 determines that it is not time to make a call (step S810: NO), the process proceeds to step S812.

[0061] In step S811, the call control unit 115 performs a call communication process. Specifically, when information indicating that it is time to call is stored in the “call timing” field stored in the damage information DB 122, the call control unit 115 calls the management center via the communication IF 170 to send information.

[0062] In step S812, the control unit 110 determines whether or not the gas meter management process has ended. If the control unit 110 determines in step S812 that the gas meter management process has ended (step S812: YES), the process ends. On the other hand, if the control unit 110 determines in step S812 that the gas meter management process has not ended (step S812: NO), the process returns to step S803, and the process from step S803 is repeated.

[0063] (Fire detection processing) Next, the fire detection process will be described with reference to the flowchart of FIG.

[0064] In step S901, the fire determination unit 112b sets the variable i to an initial value of 0. Next, the process proceeds to step S902.

[0065] In step S902, the fire determination unit 112b performs temperature measurement (T0) when the variable i = 0. Next, the process proceeds to step S903.

[0066] In step S903, the fire determination unit 112b adds the value "1" to the variable i. Next, the process proceeds to step S904.

[0067] In step S904, the fire determination unit 112b determines whether 60 seconds have elapsed since the processing of step S903. If the fire determination unit 112b determines in step S904 that 60 seconds have elapsed since the processing of step S903 (step S904: YES), the processing proceeds to step S905. On the other hand, if the fire determination unit 112b determines in step S904 that 60 seconds have not elapsed since the processing of step S903 (step S904: NO), the processing returns to step S904. That is, the processing of step S904 is repeatedly performed until 60 seconds have elapsed since the processing of step S903.

[0068] In step S905, the fire determination unit 112b calculates the temperature measurement (T i ) is performed. Next, the process proceeds to step S906.

[0069] In step S906, the fire determination unit 112b determines whether the value of the variable i is equal to or greater than "4." If the fire determination unit 112b determines in step S906 that the value of the variable i is equal to or greater than "4" (step S906: YES), the process proceeds to step S907. On the other hand, if the fire determination unit 112b determines in step S906 that the value of the variable i is not equal to or greater than "4" (step S906: NO), the process returns to step S903, and the process from step S903 is performed.

[0070] In step S907, the fire determination unit 112b determines the temperature measurement result (T i ) and the four previous temperature measurements (T i-4 ) is 5°C or higher. i-4 ) temperature is the temperature measurement result (T i ) is the temperature measured approximately 4 minutes before the temperature was measured.

[0071] In step S907, the fire determination unit 112b determines the temperature measurement result (T i ) and the temperature measurement result 4 minutes ago (T i-4 ) is 5°C or higher (step S907: YES), the process proceeds to step S909. i ) and the temperature measurement result 4 minutes ago (T i-4 ) is not equal to or higher than 5° C. (step S907: NO), the process proceeds to step S908.

[0072] In step S908, the fire determination unit 112b determines whether or not the fire determination processing has ended. This determination of whether or not the fire determination processing has ended may be made, for example, by setting a predetermined time from the earthquake determination. In step S908, if the fire determination unit 112b determines that the fire determination processing has ended (step S908: YES), the processing proceeds to step S910. On the other hand, in step S908, if the fire determination unit 112b determines that the fire determination processing has not ended (step S908: NO), the processing returns to step S903, and the processing from step S903 is repeated.

[0073] In step S909, the fire determination unit 112b determines that a fire has occurred, and the process returns to step S803 in the flowchart shown in FIG.

[0074] In step S910, the fire determination unit 112b determines that there is no fire, and the process returns to step S803 in the flowchart shown in FIG.

[0075] (House collapse determination process) Next, the house collapse determination process will be described with reference to the flowchart of FIG.

[0076] In step S1001, the house collapse determination unit 112c acquires the meter tilt initial value S0. Specifically, the house collapse determination unit 112c acquires the value of the tilt of the gas meter 10 stored in advance in the storage unit 120 as the initial value S0.

[0077] In step S1002, the house collapse determination unit 112c determines whether the vibration has stopped. If the house collapse determination unit 112c determines in step S1002 that the vibration has stopped (step S1002: YES), the process proceeds to step S1003. On the other hand, if the house collapse determination unit 112c determines in step S1002 that the vibration has not stopped (step S1002: NO), the process returns to step S1002. That is, the process of step S1002 is performed until the vibration stops.

[0078] In step S1003, the house collapse determination unit 112c acquires the current gradient value Sn of the gas meter 10. Next, the processing proceeds to step S1004.

[0079] In step S1004, the house collapse determination unit 112c compares the current tilt value Sn with the tilt value S0 of the gas meter 10 before the earthquake, which is stored in advance in the storage unit 120, and determines whether the difference in tilt is 15 degrees or more. If the house collapse determination unit 112c determines in step S1004 that the difference in tilt (Sn-S0) is 15 degrees or more (step S1004: YES), the process proceeds to step S1008. On the other hand, if the house collapse determination unit 112c determines in step S1004 that the difference in tilt (Sn-S0) is not 15 degrees or more (step S1004: NO), the process proceeds to step S1005.

[0080] In step S1005, the house collapse determination unit 112c compares the current tilt value Sn with the tilt value S0 of the gas meter 10 before the earthquake, which is stored in advance in the storage unit 120, and determines whether the difference in tilt is 5 degrees or more. If the house collapse determination unit 112c determines in step S1005 that the difference in tilt (Sn-S0) is 5 degrees or more (step S1005: YES), the process proceeds to step S1006. On the other hand, if the house collapse determination unit 112c determines in step S1005 that the difference in tilt (Sn-S0) is not 5 degrees or more (step S1005: NO), the process proceeds to step S1007.

[0081] In step S1006, the house collapse determination unit 112c determines whether the downstream pipe is broken. Here, the detection information from each sensor when the downstream pipe is broken will be described. First, if the downstream pipe is broken, gas escapes from the broken portion, and the gain (amplitude value) detected by the ultrasonic sensor 400 decreases. Furthermore, if the downstream pipe is broken, gas does not leak before the shutoff valve 21, so the gas pressure value detected by the pressure sensor 300 does not decrease. Furthermore, if gas is flowing when an earthquake occurs and the supply is shut off upon earthquake detection, the gas flow rate does not change immediately after the earthquake because the supply is shut off upon earthquake detection. Furthermore, if gas is not flowing when an earthquake occurs and the supply is not shut off upon earthquake detection, gas escapes from the broken portion immediately after the earthquake, and the gas flow rate above the flow rate of 21 L / h is detected. The house collapse determination unit 112c determines whether the downstream pipe is broken based on the information detected by the pressure sensor 300, the ultrasonic sensor 400, and the acceleration sensor 500.

[0082] In step S1006, if the house collapse determination unit 112c determines that the downstream pipe is broken (step S1006: YES), the process proceeds to step S1008. On the other hand, in step S1005, if the house collapse determination unit 112c determines that the downstream pipe is not broken (step S1006: NO), the process proceeds to step S1007.

[0083] In step S1007, the house collapse determination unit 112c determines whether the house collapse determination process has ended. This determination of whether the house collapse determination process has ended may be made, for example, by setting a predetermined time from the earthquake determination. In step S1007, if the house collapse determination unit 112c determines that the house collapse determination process has ended (step S1007: YES), the process proceeds to step S1009. On the other hand, in step S1007, if the house collapse determination unit 112c determines that the house collapse determination process has not ended (step S1007: NO), the process returns to step S1003, and the process from step S1003 is repeated.

[0084] In step S1008, the house collapse determination unit 112c determines that the house has collapsed, and the process returns to step S804 in the flowchart shown in FIG.

[0085] In step S1009, the house collapse determination unit 112c determines that the house has not collapsed, and the process returns to step S804 in the flowchart shown in FIG.

[0086] (Pipe determination processing) Next, the piping determination process will be described with reference to the flowcharts of FIGS. 11A to 11D.

[0087] In step S1101, the piping determination unit 112d determines whether or not there is a gas flow rate at the time of earthquake determination. Specifically, the piping determination unit 112d determines whether or not there is a gas flow rate at the time of earthquake determination, based on information related to the gas flow rate stored in the flow rate information DB 121. In step S1101, if the piping determination unit 112d determines that there is a gas flow rate at the time of earthquake determination (step S1101: YES), the process proceeds to step S1102. On the other hand, in step S1101, if the piping determination unit 112d determines that there is no gas flow rate at the time of earthquake determination (step S1101: NO), the process proceeds to step S1103.

[0088] In step S1102, the piping determination unit 112d performs piping determination processing in the case where there is a gas flow rate when an earthquake is determined. Specifically, the subroutine processing shown in FIG.

[0089] The process when there is a gas flow rate when an earthquake is detected as shown in FIG. 11B will be described.

[0090] In step S1111, the piping determination unit 112d performs earthquake-sensing isolation of the piping. Specifically, the piping determination unit 112d controls the shutoff valve IF160 to close the valve body of the shutoff valve 21 to shut off the piping 20. Next, the process proceeds to step S1112.

[0091] In step S1112, the piping determining unit 112d determines whether the ultrasonic reception amplitude has decreased. Specifically, the piping determining unit 112d determines whether the ultrasonic reception amplitude has decreased based on the ultrasonic wave detection information acquired by the ultrasonic sensor 400. In step S1112, if the piping determining unit 112d determines that the ultrasonic reception amplitude has decreased (step S1112: YES), the process proceeds to step S1118. On the other hand, in step S1112, if the piping determining unit 112d determines that the ultrasonic reception amplitude has not decreased (step S1112: NO), the process proceeds to step S1113.

[0092] In step S1113, the piping determination unit 112d determines whether the piping pressure value has dropped to 680 Pa or less. Specifically, the piping determination unit 112d determines whether the pressure value of the piping 20 detected by the pressure sensor 300 has dropped to 680 Pa or less. In step S1113, if the piping determination unit 112d determines that the piping pressure value has dropped to 680 Pa or less (step S1113: YES), the process proceeds to step S1119. On the other hand, in step S1113, if the piping determination unit 112d determines that the piping pressure value has not dropped to 680 Pa or less (step S1113: NO), the process proceeds to step S1114.

[0093] In step S1114, the piping determination unit 112d determines whether or not the restoration based on the "restoration safety check" has failed. Here, the "restoration safety check" is a process in which the control unit 110 of the gas meter 10 determines whether or not gas is being used normally, starting from a restoration operation (such as pressing the shutoff valve open switch of the gas meter 10). In step S1114, if the piping determination unit 112d determines that the restoration based on the "restoration safety check" has failed (step S1114: YES), the process proceeds to step S1116. On the other hand, in step S1114, if the piping determination unit 112d determines that the restoration based on the "restoration safety check" has succeeded (step S1114: NO), the process proceeds to step S1115.

[0094] In step S1115, the piping determination unit 112d determines whether or not there is a pressure increase in the piping 20. If, in step S1115, the piping determination unit 112d determines that there is a pressure increase in the piping 20 (step S1115: YES), the process proceeds to step S1117. On the other hand, if, in step S1115, the piping determination unit 112d determines that there is no pressure increase in the piping 20 (step S1115: NO), the process proceeds to step S1121.

[0095] In step S1116, the piping determination unit 112d determines whether the flow rate detected at the time of restoration due to the "restoration safety confirmation" is equal to or greater than 3 L / h and equal to or less than 21 L / h. In step S1116, if the piping determination unit 112d determines that the flow rate detected at the time of restoration due to the "restoration safety confirmation" is equal to or greater than 3 L / h and equal to or less than 21 L / h (step S1116: YES), the process proceeds to step S1122. On the other hand, in step S1116, if the piping determination unit 112d determines that the flow rate detected at the time of restoration due to the "restoration safety confirmation" is less than 3 L / h or more than 21 L / h (step S1116: NO), the process returns to step S1112. In other words, the process from step S1112 is repeatedly performed.

[0096] In step S1117, the piping determination unit 112d determines whether 24 hours have passed since the earthquake determination. If the piping determination unit 112d determines in step S1117 that 24 hours have passed since the earthquake determination (step S1117: YES), the process proceeds to step S1120. On the other hand, if the piping determination unit 112d determines in step S1117 that 24 hours have not passed since the earthquake determination (step S1117: NO), the process returns to step S1115, and the process from step S1115 is repeated.

[0097] In step S1118, the piping determination unit 112d determines that the piping downstream of the gas meter 10 is broken, and the process returns to step S1102 of the flowchart shown in FIG. 11A.

[0098] In step S1119, the piping determination unit 112d determines that the piping upstream of the gas meter 10 is broken, and the process returns to step S1102 of the flowchart shown in FIG. 11A.

[0099] In step S1120, the piping determination unit 112d determines that gas is leaking from the piping upstream of the gas meter 10, and the process returns to step S1102 of the flowchart shown in FIG. 11A.

[0100] In step S1121, the piping determination unit 112d determines that the piping 20 is not damaged, and the process returns to step S1102 of the flowchart shown in FIG. 11A.

[0101] In step S1122, the piping determination unit 112d determines that gas is leaking from the piping downstream of the gas meter 10, and the process returns to step S1102 of the flowchart shown in FIG. 11A.

[0102] Next, step S1103 in FIG. 11A will be described.

[0103] In step S1103, the piping determination unit 112d performs piping determination processing in the case where there is no gas flow rate when an earthquake is determined. Specifically, the subroutine processing shown in Fig. 11C and Fig. 11D is performed.

[0104] The process when there is no gas flow rate when an earthquake is detected as shown in FIG. 11C will be described.

[0105] In step S1131, the piping determination unit 112d determines whether the gas flow rate has increased after the earthquake determination. If the piping determination unit 112d determines in step S1131 that the gas flow rate has increased after the earthquake determination (step S1131: YES), the process proceeds to step S1132. On the other hand, if the piping determination unit 112d determines in step S1131 that the gas flow rate has not increased after the earthquake determination (step S1131: NO), the process proceeds to step S1136.

[0106] In step S1132, the piping determination unit 112d performs earthquake-sensing shutdown. Specifically, the piping determination unit 112d shuts off the shutoff valve 21 via the shutoff valve IF 160. Next, the process proceeds to step S1133.

[0107] In step S1133, the piping determination unit 112d determines whether or not the gas was shut off with "post-monitoring." Here, "post-monitoring" is a function of the gas meter 10 that monitors whether or not there is a gas flow for two minutes from the time when vibration is detected. For example, in "post-monitoring," the gas meter 10 shuts off the gas when the gas flow rate is 21 L / h or more after an earthquake. In step S1133, if the piping determination unit 112d determines that the gas was shut off with "post-monitoring" (step S1133: YES), the process proceeds to step S1134. On the other hand, in step S1133, if the piping determination unit 112d determines that the gas was not shut off with "post-monitoring" (step S1133: NO), the process proceeds to step S1135.

[0108] In step S1134, the piping determination unit 112d determines that the piping downstream of the gas meter 10 is broken, and the process returns to step S1103 of the flowchart shown in FIG. 11A.

[0109] In step S1135, the piping determination unit 112d determines that gas is leaking from the piping downstream of the gas meter 10, and the process returns to step S1103 of the flowchart shown in FIG. 11A.

[0110] In step S1136, the piping determining unit 112d determines whether the piping pressure value has dropped to 680 Pa or less. If the piping determining unit 112d determines in step S1136 that the piping pressure value has dropped to 680 Pa or less (step S1136: YES), the process proceeds to step S1137. On the other hand, if the piping determining unit 112d determines in step S1136 that the piping pressure value has not dropped to 680 Pa or less (step S1136: NO), the process proceeds to step S1138.

[0111] In step S1137, the piping determination unit 112d determines that the piping upstream of the gas meter 10 is broken, and the process returns to step S1103 of the flowchart shown in FIG. 11A.

[0112] In step S1138, the piping determination unit 112d determines whether or not 120 seconds or more have passed since the earthquake determination. If the piping determination unit 112d determines in step S1138 that 120 seconds or more have passed since the earthquake determination (step S1138: YES), the process proceeds to step S1139. On the other hand, if the piping determination unit 112d determines in step S1138 that 120 seconds or more have not passed since the earthquake determination (step S1138: NO), the process returns to step S1131, and the process from step S1131 is repeated.

[0113] In step S1139, the piping determination unit 112d resumes gas use based on the "gas use permission determination." Here, the "gas use permission determination" is a process in which the control unit 110 permits gas use 120 seconds after the occurrence of an earthquake. After this "gas use permission determination," gas can be used as usual. Next, the process proceeds to step S1140 in FIG. 11D.

[0114] In step S1140, the piping determination unit 112d determines whether or not it has detected that there is no gas flow. If the piping determination unit 112d has detected that there is no gas flow (step S1140: YES), the process proceeds to step S1141. On the other hand, if the piping determination unit 112d has not detected that there is no gas flow (step S1140: NO), the process proceeds to step S1150.

[0115] In step S1141, the piping determination unit 112d determines whether or not a state in which there is no gas flow has continued for 128 seconds. If the piping determination unit 112d determines in step S1141 that a state in which there is no gas flow has continued for 128 seconds (step S1141: YES), the process proceeds to step S1142. On the other hand, if the piping determination unit 112d determines in step S1141 that a state in which there is no gas flow has not continued for 128 seconds (step S1141: NO), the process proceeds to step S1150.

[0116] In step S1142, the piping determination unit 112d acquires the reference pressure P0 of the piping 20. Next, the process proceeds to step S1143.

[0117] In step S1143, the piping determination unit 112d determines whether 15 minutes have passed since the reference pressure P0 or the current pressure Pn was acquired. If, in step S1143, the piping determination unit 112d determines that 15 minutes have passed since the reference pressure P0 or the current pressure Pn was acquired (step S1143: YES), the process proceeds to step S1144. On the other hand, if, in step S1143, the piping determination unit 112d determines that 15 minutes have not passed since the reference pressure P0 or the current pressure Pn was acquired (step S1143: NO), the process returns to step S1143, and the process from step S1143 is repeated.

[0118] In step S1144, the piping determination unit 112d determines whether the no gas flow state has continued for 15 minutes. If the piping determination unit 112d determines in step S1144 that the no gas flow state has continued for 15 minutes (step S1144: YES), the process proceeds to step S1145. On the other hand, if the piping determination unit 112d determines in step S1144 that the no gas flow state has not continued for 15 minutes (step S1144: NO), the process proceeds to step S1150.

[0119] In step S1145, the piping determination unit 112d acquires the current pressure Pn of the piping 20. Next, the process proceeds to step S1146.

[0120] In step S1146, the piping determination unit 112d determines whether the current pressure Pn of the piping 20 is greater than (P0 + 0.2 kPa). If the piping determination unit 112d determines in step S1146 that the current pressure Pn of the piping 20 is greater than (P0 + 0.2 kPa) (step S1146: YES), the process proceeds to step S1149. On the other hand, if the piping determination unit 112d determines in step S1146 that the current pressure value of the piping 20 is equal to or less than (P0 + 0.2 kPa) (step S1146: NO), the process proceeds to step S1147.

[0121] In step S1147, the piping determination unit 112d determines whether 24 hours have passed since the earthquake determination. If the piping determination unit 112d determines in step S1147 that 24 hours have passed since the earthquake determination (step S1147: YES), the process proceeds to step S1148. On the other hand, if the piping determination unit 112d determines in step S1147 that 24 hours have not passed since the earthquake determination (step S1147: NO), the process returns to step S1143, and the process from step S1143 is repeated.

[0122] In step S1148, the piping determination unit 112d determines that gas is leaking from the piping upstream of the gas meter 10, and the process returns to step S1103 of the flowchart shown in FIG. 11A.

[0123] In step S1149, the piping determination unit 112d determines that the piping 20 is not damaged, and the process returns to step S1103 of the flowchart shown in FIG. 11A.

[0124] In step S1150, the piping determination unit 112d determines whether the state with gas flow has continued for 24 hours. If the piping determination unit 112d determines in step S1150 that the state with gas flow has continued for 24 hours (step S1150: YES), the process proceeds to step S1151. On the other hand, if the piping determination unit 112d determines in step S1150 that the state with gas flow has not continued for 24 hours (step S1150: NO), the process returns to step S1140, and the process from step S1140 is repeated.

[0125] In step S1151, the piping determination unit 112d determines that gas is leaking from the piping downstream of the gas meter 10, and the process returns to step S1103 of the flowchart shown in FIG. 11A.

[0126] (Ground inclination determination processing) Next, the ground inclination determination process will be described with reference to the flowchart of FIG.

[0127] In step S1201, the ground inclination determination unit 112e determines whether five minutes have passed since the earthquake determination. If the ground inclination determination unit 112e determines in step S1201 that five minutes have passed since the earthquake determination (step S1201: YES), the process proceeds to step S1202. On the other hand, if the ground inclination determination unit 112e determines in step S1201 that five minutes have not passed since the earthquake determination (step S1201: NO), the process returns to step S1201. That is, the process of step S1201 is repeatedly performed until five minutes have passed after the earthquake determination.

[0128] In step S1202, the ground inclination determination unit 112e acquires the initial value S0 of the meter inclination. Next, the process proceeds to step S1203.

[0129] In step S1203, the ground inclination determination unit 112e determines whether 120 minutes have passed since the value of the inclination of the gas meter 10 was acquired. In step S1203, if the ground inclination determination unit 112e determines that 120 minutes have passed since the value of the inclination of the gas meter 10 was acquired (step S1203: YES), the process proceeds to step S1204. On the other hand, in step S1203, if the ground inclination determination unit 112e determines that 120 minutes have not passed since the value of the inclination of the gas meter 10 was acquired (step S1203: NO), the process returns to step S1203. In other words, the process of step S1203 is repeatedly performed until 120 minutes have passed since the value of the inclination of the gas meter 10 was acquired.

[0130] In step S1204, the ground inclination determination unit 112e acquires the current value Sn of the inclination of the gas meter. Next, the process proceeds to step S1205.

[0131] In step S1205, the ground inclination determination unit 112e determines whether the difference between the current value Sn and the initial value S0 of the gas meter inclination is 3 degrees or more. If the ground inclination determination unit 112e determines in step S1205 that the difference between the current value Sn and the initial value S0 of the gas meter inclination is 3 degrees or more (step S1205: YES), the process proceeds to step S1211. On the other hand, if the ground inclination determination unit 112e determines in step S1205 that the difference between the current value Sn and the initial value S0 of the gas meter inclination is not 3 degrees or more (step S1205: NO), the process proceeds to step S1206.

[0132] In step S1206, the ground inclination determination unit 112e determines whether 36 hours have passed since the earthquake determination. If the ground inclination determination unit 112e determines in step S1206 that 36 hours have passed since the earthquake determination (step S1206: YES), the process proceeds to step S1207. On the other hand, if the ground inclination determination unit 112e determines in step S1206 that 36 hours have not passed since the earthquake determination (step S1206: NO), the process returns to step S1203, and the process from step S1203 is repeated.

[0133] In step S1207, the ground inclination determination unit 112e acquires the intermediate value S36 of the inclination of the gas meter. Next, the process proceeds to step S1208.

[0134] In step S1208, the ground inclination determination unit 112e determines whether 72 hours have passed since the earthquake determination. If the ground inclination determination unit 112e determines in step S1208 that 72 hours have passed since the earthquake determination (step S1208: YES), the process proceeds to step S1209. On the other hand, if the ground inclination determination unit 112e determines in step S1208 that 72 hours have not passed since the earthquake determination (step S1208: NO), the process returns to step S1203, and the process from step S1203 is repeated.

[0135] In step S1209, the ground inclination determination unit 112e acquires the final value S72 of the inclination of the gas meter. Next, the process proceeds to step S1210.

[0136] In step S1210, the ground inclination determination unit 112e determines whether there is a change (difference) between the intermediate value S36 and the final value S72. If the ground inclination determination unit 112e determines in step S1210 that there is a change between the intermediate value S36 and the final value S72 (step S1210: YES), the process proceeds to step S1211. On the other hand, if the ground inclination determination unit 112e determines in step S1210 that there is no change between the intermediate value S36 and the final value S72 (step S1210: NO), the process proceeds to step S1212.

[0137] That is, in step S1210, if there is even a slight change in the tilt of the gas meter 10, it is determined that the ground is tilting, for example, and it is determined in step S1211 that there is a ground tilt. On the other hand, if there is no difference of 3 degrees or more in step S1205 and there is no change between the intermediate value S36 and the final value S72, it is determined that there is no ground tilt (step S1212).

[0138] In step S1211, the ground inclination determination unit 112e determines that there is a ground inclination, and the process returns to step S806 in the flowchart shown in FIG.

[0139] In step S1212, the ground inclination determination unit 112e determines that there is no ground inclination, and the process returns to step S806 in the flowchart shown in FIG.

[0140] (Furniture underlay determination process) Next, the furniture underlay determination process will be described with reference to the flowchart of FIG.

[0141] In step S1301, the furniture underlay determination unit 112f measures the flow rate of gas.

[0142] In step S1302, the furniture underlay determination unit 112f determines whether or not there is earthquake-sensing blocking. If the furniture underlay determination unit 112f determines in step S1302 that there is earthquake-sensing blocking (step S1302: YES), the process proceeds to step S1304. On the other hand, if the furniture underlay determination unit 112f determines in step S1302 that there is no earthquake-sensing blocking (step S1302: NO), the process proceeds to step S1303.

[0143] In step S1303, the furniture underlay determination unit 112f determines whether or not a gas flow rate has been detected within 24 hours before the earthquake, based on the information stored in the flow rate information DB 121. In step S1303, if the furniture underlay determination unit 112f determines that a gas flow rate has been detected within 24 hours before the earthquake (step S1303: YES), the process proceeds to step S1306. On the other hand, in step S1303, if the furniture underlay determination unit 112f determines that a gas flow rate has not been detected within 24 hours before the earthquake (step S1303: NO), the process proceeds to step S1309.

[0144] In step S1304, the furniture underlay determination unit 112f determines whether or not a valve opening operation of the shutoff valve has occurred. If the furniture underlay determination unit 112f determines in step S1304 that a valve opening operation has not occurred (step S1304: YES), the process proceeds to step S1305. On the other hand, if the furniture underlay determination unit 112f determines in step S1304 that a valve opening operation has occurred (step S1304: NO), the process proceeds to step S1309.

[0145] In step S1305, the furniture underlay determination unit 112f determines whether 48 hours have passed since the earthquake determination. If the furniture underlay determination unit 112f determines in step S1305 that 48 hours have passed since the earthquake determination (step S1305: YES), the process proceeds to step S1308. On the other hand, if the furniture underlay determination unit 112f determines in step S1305 that 48 hours have not passed since the earthquake determination (step S1305: NO), the process returns to step S1304, and the process from step S1304 is repeated.

[0146] That is, in the processing of steps S1304 and S1305, if the furniture underlay determination unit 112f determines that the shutoff valve 21 has been opened within 48 hours after the earthquake determination, the process proceeds to "determine whether furniture is underlay" in step S1309. On the other hand, in the processing of steps S1304 and S1305, if the furniture underlay determination unit 112f determines that the shutoff valve 21 has not been opened within 48 hours after the earthquake determination, the process proceeds to "determine whether furniture is underlay" in step S1308.

[0147] In step S1306, the furniture underlay determination unit 112f determines whether or not the gas flow rate has been detected, based on the information stored in the flow rate information DB 121. In step S1306, if the furniture underlay determination unit 112f determines that the gas flow rate has been detected (step S1306: YES), the process proceeds to step S1309. On the other hand, in step S1306, if the furniture underlay determination unit 112f determines that the gas flow rate has not been detected (step S1306: NO), the process proceeds to step S1307.

[0148] In step S1307, the furniture underlay determination unit 112f determines whether 48 hours have passed since the earthquake determination. If, in step S1307, the furniture underlay determination unit 112f determines that 48 hours have passed since the earthquake determination (step S1307: YES), the process proceeds to step S1310. On the other hand, if, in step S1307, the furniture underlay determination unit 112f determines that 48 hours have not passed since the earthquake determination (step S1307: NO), the process returns to step S1306 and repeats the process from step S1306.

[0149] That is, in the processing of steps S1306 and S1307, if the furniture underlay determination unit 112f determines that there is a gas flow within 48 hours after the earthquake determination, the process proceeds to "Determine whether there is furniture underlay" in step S1309. On the other hand, in the processing of steps S1306 and S1307, if the furniture underlay determination unit 112f determines that there is no gas flow within 48 hours after the earthquake determination, the process proceeds to "Determine whether there is furniture underlay" in step S1310. That is, if there is a gas flow within 24 hours before the earthquake occurrence (step S1303: YES) but there is no gas flow for 48 hours after the earthquake determination, the furniture underlay determination unit 112f determines that the user is unable to move due to some kind of abnormality. In this case, the furniture underlay determination unit 112f determines that there is a furniture underlay state.

[0150] In step S1308, the furniture underlay determination unit 112f determines that a furniture underlay is present, and the process returns to step S807 in the flowchart shown in FIG.

[0151] In step S1309, the furniture underlay determination unit 112f determines that there is no furniture underlay, and the process returns to step S807 in the flowchart shown in FIG.

[0152] In step S1310, the furniture underlay determination unit 112f determines that a furniture underlay is present, and the process returns to step S807 in the flowchart shown in FIG.

[0153] As described above, the gas meter management device 100 in this embodiment includes the sensor information acquisition unit 101, the sensor information determination unit 112, the damage assessment value calculation unit 113, the threshold determination unit 114, and the call control unit 115. The sensor information acquisition unit 101 acquires detection information detected by the sensors, including acceleration sensor information, pressure sensor information, and ultrasonic sensor information. The sensor information determination unit 112 determines the damage status of the gas meter 10 based on the detection information. The damage assessment value calculation unit 113 calculates a damage assessment value indicating the urgency of the call for damage information based on the result of the determination by the sensor information determination unit. The threshold determination unit 114 determines whether the damage assessment value is equal to or greater than a threshold. The call control unit 115 calls for damage information to the outside if the damage assessment value is equal to or greater than the threshold.

[0154] As a result, the gas meter management device 100 can determine the damage situation based on the pressure sensor information and the ultrasonic sensor information, thereby making a fire detection, house collapse detection, pipe rupture detection, gas leak from pipe detection, ground tilt detection, and / or furniture crush detection. That is, the gas meter management device 100 in this embodiment can detect damage information other than the occurrence of an earthquake and the tilt of the gas meter 10, and can appropriately adjust the timing of calls from the gas meter 10 to the management center. Furthermore, by appropriately adjusting the timing of calls from the gas meter 10 to the management center, it is possible to prevent communication congestion between the gas meter 10 and the management center when a disaster occurs.

[0155] The gas meter management device 100 may also include a flow rate calculation unit 111 that calculates the flow rate of gas flowing through the piping 20 based on ultrasonic sensor information. This enables the gas meter management device to appropriately detect the gas flow rate when an earthquake or other event occurs. This method of calculating the gas flow rate based on ultrasonic sensor information causes almost no pressure loss compared to flow rate calculations using a general membrane method, and can also appropriately calculate the flow rate for various piping conditions such as during a disaster. Furthermore, the method of calculating the gas flow rate based on ultrasonic sensor information has a simple structure in which only one set of ultrasonic sensors 400 is placed in the fluid flow, making it possible to achieve miniaturization.

[0156] Furthermore, the sensor information determination unit 112 of the gas meter management device 100 may include a fire determination unit 112b that determines whether a fire has occurred based on ultrasonic sensor information. This enables the gas meter management device 100 to determine whether a fire has occurred when an earthquake occurs, and, for example, to make a high-level emergency call to a management center when a fire occurs.

[0157] Furthermore, the sensor information determination unit 112 of the gas meter management device 100 may include a house collapse determination unit 112c that determines whether or not a house has collapsed based on acceleration sensor information, ultrasonic sensor information, and pressure sensor information. This enables the gas meter management device 100 to determine whether or not a house has collapsed due to the occurrence of an earthquake, and, for example, to make a high-level emergency call to a management center when a house collapses.

[0158] Furthermore, the sensor information determination unit 112 of the gas meter management device 100 may include a piping determination unit 112d that determines whether or not a rupture has occurred in the piping 20 or a gas leak has occurred from the piping 20, based on the ultrasonic sensor information, the pressure sensor information, and the gas flow rate. This enables the gas meter management device 100 to appropriately detect the state of a piping rupture or a gas leak from a piping when an earthquake occurs.

[0159] Furthermore, the sensor information determination unit 112 of the gas meter management device 100 may include a ground tilt determination unit 112e that determines whether or not a ground tilt has occurred based on acceleration sensor information. This enables the gas meter management device 100 to determine whether or not a ground tilt has occurred due to the occurrence of an earthquake. For example, when a ground tilt has occurred, the gas meter management device 100 can call a management center, which can then warn nearby residents and others about the ground tilt and issue evacuation advice.

[0160] Furthermore, the sensor information determination unit 112 of the gas meter management device 100 may include a furniture crush determination unit 112f that determines whether or not an appliance has been crushed by furniture based on the gas flow rate. This enables the gas meter management device 100 to determine whether or not an appliance has been crushed by furniture due to the occurrence of an earthquake.

[0161] (Other embodiments) Although the embodiments have been described in detail with reference to the drawings, the present embodiments are not limited to the contents described in the above embodiments. Furthermore, the components described above include those that can be easily imagined by a person skilled in the art and those that are substantially the same. Furthermore, the configurations described above can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the configurations can be made without departing from the spirit of the embodiments.

[0162] In the above-described embodiment, the gas meter management device 100 is configured to calculate the temperature based on ultrasonic sensor information detected by the ultrasonic sensor 400. This temperature calculation is not limited to a configuration based on ultrasonic sensor information, and may be, for example, a configuration using a quartz oscillator. The quartz oscillator is provided inside the gas meter management device 100. For example, a configuration may be used in which the temperature and frequency characteristics of the quartz oscillator are used to back-calculate the temperature from the oscillator frequency.

[0163] In the above-described embodiment, the call control unit 115 is configured to call the management center based on the call timing determined by the threshold determination unit 114. For example, the gas meter management device 100 may calculate more specific call timing depending on the disaster situation by adjusting the determination value in FIG. 6. For example, the determination value may be adjusted so that a call is made immediately when a fire or a house collapse is determined. Specifically, in the example shown in FIG. 6, by setting the determination value for house collapse to "30," a call is made immediately when a fire or a house collapse is determined. Furthermore, in the case of a break in the pipe 20 and / or a gas leak from the pipe 20, a call may be made at a random time within 60 minutes after the detection. Furthermore, when determining the inclination of the ground, the control unit 110 and the call control unit 115 may be configured to make a call when an information request from the management center is detected. Furthermore, for example, if no disaster has been determined, the control unit 110 and the call control unit 115 may be configured to make a call when data is requested by polling communication from the management center.

[0164] Furthermore, a computer program that causes a computer to execute the processing (gas meter management method) in the gas meter management device 100 described above, and a computer-readable recording medium on which the program is recorded, are included within the scope of this embodiment. Any type of computer-readable recording medium may be used. Furthermore, the computer program is not limited to being recorded on the recording medium, and may be transmitted via a telecommunications line, a wireless or wired communication line, a network such as the Internet, or the like.

[0165] The features of the gas meter management device 100, the gas meter management method, and the gas meter management program will be described below.

[0166] The gas meter management device 100 according to the first aspect includes a sensor information acquisition unit 101 that acquires detection information. The detection information is information detected by a sensor and includes acceleration sensor information related to vibrations of the gas meter, pressure sensor information related to the gas pressure in the pipe through which the gas flows, and ultrasonic sensor information related to ultrasonic signals in the pipe. The gas meter management device 100 also includes a sensor information determination unit 112 that determines the damage status of the gas meter based on the detection information acquired by the sensor information acquisition unit 101. The gas meter management device 100 also includes a damage assessment value calculation unit 113 that calculates a damage assessment value indicating the urgency of issuing a call for damage information to an external party based on the result of the determination by the sensor information determination unit 112. The gas meter management device 100 also includes a threshold determination unit 114 that determines whether the damage assessment value is equal to or greater than a threshold stored in advance in the storage unit 120. The gas meter management device 100 also includes a call control unit 115 that issues a call for damage information to an external party when the damage assessment value is equal to or greater than the threshold.

[0167] According to the above configuration, the gas meter management device 100 can determine the damage status based on pressure sensor information and ultrasonic sensor information, thereby making it possible to determine whether a fire has occurred, whether a house has collapsed, whether a pipe has broken, whether a gas leak has occurred from a pipe, whether the ground is tilted, and / or whether furniture has been crushed. That is, the gas meter management device 100 in this embodiment can detect damage information other than the occurrence of an earthquake and the tilt of the gas meter 10, and can appropriately adjust the timing of calls from the gas meter 10 to the management center. Furthermore, by appropriately adjusting the timing of calls from the gas meter 10 to the management center, it is possible to prevent communication congestion between the gas meter 10 and the management center when a disaster occurs.

[0168] The gas meter management device 100 according to the second aspect may include a flow rate calculation unit 111 that calculates the flow rate of gas flowing in the pipe 20 based on the ultrasonic sensor information.

[0169] With the above configuration, the gas meter management device can properly detect the gas flow rate when an earthquake or other event occurs. This method of calculating the gas flow rate based on ultrasonic sensor information causes almost no pressure loss compared to flow rate calculations using a typical membrane method, and can properly calculate the flow rate even in various piping conditions, such as during a disaster. Furthermore, the method of calculating the gas flow rate based on ultrasonic sensor information has a simple structure in which only one set of ultrasonic sensors 400 is placed in the fluid flow, making it possible to achieve miniaturization.

[0170] The sensor information determination unit 112 of the gas meter management device 100 according to the third embodiment may include a fire determination unit 112b that determines whether or not a fire has occurred based on ultrasonic sensor information.

[0171] According to the above configuration, the gas meter management device 100 is able to determine whether or not a fire has occurred when an earthquake occurs, and, for example, in the event of a fire, it is able to make a high-level emergency call to the management center.

[0172] The sensor information determination unit 112 of the gas meter management device 100 according to the fourth aspect may include a house collapse determination unit 112c that determines whether or not a house has collapsed based on acceleration sensor information, ultrasonic sensor information, and pressure sensor information.

[0173] According to the above configuration, the gas meter management device 100 can determine whether or not a house has collapsed due to the occurrence of an earthquake, and can make a high-level emergency call to the management center when a house collapses, for example.

[0174] The sensor information determination unit 112 of the gas meter management device 100 according to the fifth aspect may include a piping determination unit 112d that determines whether a break has occurred in the piping 20 or whether a gas leak has occurred from the piping 20 based on ultrasonic sensor information, pressure sensor information, and gas flow rate.

[0175] According to the above configuration, the gas meter management device 100 can appropriately detect the state of piping breakage and gas leakage from piping when an earthquake occurs.

[0176] The sensor information determination unit 112 of the gas meter management device 100 according to the sixth embodiment may include a ground inclination determination unit 112e that determines whether or not the ground has inclined based on the acceleration sensor information.

[0177] According to the above configuration, the gas meter management device 100 can determine whether or not the occurrence of an earthquake has caused the ground to tilt. For example, when the ground tilts, the gas meter management device 100 can call the management center, which can then issue a warning to nearby residents about the ground tilt and an evacuation advisory.

[0178] The sensor information determination unit 112 of the gas meter management device 100 according to the seventh embodiment may include a furniture-under-cover determination unit 112f that determines whether or not an object has been undercover by furniture, based on the gas flow rate.

[0179] According to the above configuration, the gas meter management device 100 can determine whether or not someone has been crushed by furniture due to the occurrence of an earthquake.

[0180] A gas meter management method according to an eighth aspect is a gas meter management method executed by a computer, and acquires detection information. This detection information is information detected by a sensor, and includes acceleration sensor information related to vibrations of the gas meter, pressure sensor information related to the gas pressure in the pipe through which the gas flows, and ultrasonic sensor information related to ultrasonic signals in the pipe. The gas meter management method also determines a damage situation to the gas meter 10 based on the detection information. The gas meter management method also calculates a damage assessment value indicating the urgency of issuing a call for damage information to an external party based on the result of the damage situation determination. The gas meter management method also determines whether the damage assessment value is equal to or greater than a threshold value stored in advance in a storage unit. The gas meter management method also issues a call for damage information to an external party if the damage assessment value is equal to or greater than the threshold value.

[0181] According to the above-described gas meter management method, by determining the damage status based on pressure sensor information and ultrasonic sensor information, it is possible to determine whether a fire has occurred, whether a house has collapsed, whether a pipe has broken, whether a gas leak has occurred from a pipe, whether the ground is tilted, and / or whether furniture has been crushed. That is, the gas meter management method of this embodiment makes it possible to detect damage information other than the occurrence of an earthquake and the tilt of the gas meter 10, and to appropriately adjust the timing of calls from the gas meter 10 to the management center. Furthermore, by appropriately adjusting the timing of calls from the gas meter 10 to the management center, it is possible to prevent communication congestion between the gas meter 10 and the management center when a disaster occurs.

[0182] A gas meter management program according to a ninth aspect is a program to be executed by a computer. The gas meter management program includes a step of acquiring detection information. The detection information is information detected by a sensor and includes acceleration sensor information related to vibrations of the gas meter, pressure sensor information related to the gas pressure in the pipe through which the gas flows, and ultrasonic sensor information related to ultrasonic signals in the pipe. The gas meter management program also includes a step of determining a damage status to the gas meter based on the detection information. The gas meter management program also includes a step of calculating a damage assessment value indicating the urgency of issuing a call for damage information to an external party based on the result of the damage status determination. The gas meter management program also includes a step of determining whether the damage assessment value is equal to or greater than a threshold value stored in advance in a storage unit. The gas meter management program also includes a step of issuing a call for damage information to an external party if the damage assessment value is equal to or greater than the threshold value.

[0183] According to the gas meter management program, by determining the damage status based on pressure sensor information and ultrasonic sensor information, it is possible to determine whether a fire has occurred, whether a house has collapsed, whether a pipe has broken, whether a gas leak has occurred from a pipe, whether the ground is tilted, and / or whether furniture has been crushed. That is, the gas meter management program in this embodiment is capable of detecting damage information other than the occurrence of an earthquake and the tilt of the gas meter 10, and is able to appropriately adjust the timing of calls from the gas meter 10 to the management center. Furthermore, by appropriately adjusting the timing of calls from the gas meter 10 to the management center, it is possible to prevent communication congestion between the gas meter 10 and the management center when a disaster occurs. [Explanation of symbols]

[0184] 10 Gas meter 20 Piping 100 Gas meter management device 101 Sensor information acquisition unit 112 Sensor information determination unit 113 Damage Assessment Value Calculation Unit 114 Threshold judgment unit 115 Call control section

Claims

1. a sensor information acquisition unit that acquires detection information detected by sensors, the detection information including acceleration sensor information related to vibrations of the gas meter, pressure sensor information related to the pressure of the gas in a pipe through which the gas flows, and ultrasonic sensor information related to ultrasonic signals in the pipe; a sensor information determination unit that determines a damage status to the gas meter based on the detection information acquired by the sensor information acquisition unit; a damage assessment value calculation unit that calculates a damage assessment value indicating the urgency of sending damage information to the outside based on the result of the determination by the sensor information determination unit; a threshold value determination unit that determines whether the damage assessment value is equal to or greater than a threshold value that is stored in advance in a storage unit; a call control unit that issues a call to the outside for damage information when the damage assessment value is equal to or greater than the threshold value, The sensor information determination unit includes a house collapse determination unit that determines whether or not a house has collapsed based on the acceleration sensor information, the ultrasonic sensor information, and the pressure sensor information.

2. a sensor information acquisition unit that acquires detection information detected by sensors, the detection information including acceleration sensor information related to vibrations of the gas meter, pressure sensor information related to the pressure of the gas in a pipe through which the gas flows, and ultrasonic sensor information related to ultrasonic signals in the pipe; a flow rate calculation unit that calculates a flow rate of the gas flowing through the pipe based on the ultrasonic sensor information; a sensor information determination unit that determines a damage state to the gas meter based on the detection information acquired by the sensor information acquisition unit and the gas flow rate calculated by the flow rate calculation unit; and a damage assessment value calculation unit that calculates a damage assessment value indicating the urgency of sending damage information to the outside based on the result of the determination by the sensor information determination unit; a threshold value determination unit that determines whether the damage assessment value is equal to or greater than a threshold value that is stored in advance in a storage unit; a call control unit that issues a call to the outside for damage information when the damage assessment value is equal to or greater than the threshold value, The gas meter management device, wherein the sensor information determination unit includes a furniture under-hit determination unit that determines whether or not the gas has been under-hit by furniture based on the gas flow rate.

3. The gas meter management device according to claim 1 , further comprising a flow rate calculation unit that calculates a flow rate of the gas flowing through the pipe based on the ultrasonic sensor information.

4. The gas meter management device according to claim 1 , wherein the sensor information determination unit includes a fire determination unit that determines whether a fire has occurred based on the ultrasonic sensor information.

5. The gas meter management device according to claim 2 or 3, wherein the sensor information determination unit includes a piping determination unit that determines whether a break has occurred in the piping or whether the gas is leaking from the piping based on the ultrasonic sensor information, the pressure sensor information, and the gas flow rate.

6. The gas meter management device according to claim 1 , wherein the sensor information determination unit includes a ground inclination determination unit that determines whether or not a ground inclination has occurred based on the acceleration sensor information.

7. A computer-implemented gas meter management method, comprising: Acquire detection information detected by sensors, the detection information including acceleration sensor information relating to vibrations of the gas meter, pressure sensor information relating to the pressure of the gas in a pipe through which the gas flows, and ultrasonic sensor information relating to ultrasonic signals in the pipe; determining the damage situation to the gas meter and whether or not the house has collapsed based on the detection information; calculating a damage assessment value indicating the urgency of sending damage information to an outside party based on the result of the damage situation determination; determining whether the damage assessment value is equal to or greater than a threshold value stored in advance in a storage unit; A gas meter management method, comprising: issuing damage information to the outside when the damage assessment value is equal to or greater than the threshold value; A gas meter management method, wherein determining the damage status to the gas meter includes determining whether or not a house has collapsed based on the acceleration sensor information, the ultrasonic sensor information, and the pressure sensor information.

8. A computer-implemented gas meter management method, comprising: Acquire detection information detected by sensors, the detection information including acceleration sensor information relating to vibrations of the gas meter, pressure sensor information relating to the pressure of the gas in a pipe through which the gas flows, and ultrasonic sensor information relating to ultrasonic signals in the pipe; Calculating a flow rate of the gas flowing through the pipe based on the ultrasonic sensor information; determining a damage state to the gas meter based on the detection information and the gas flow rate; calculating a damage assessment value indicating the urgency of sending damage information to an outside party based on the result of the damage situation determination; determining whether the damage assessment value is equal to or greater than a threshold value stored in advance in a storage unit; A gas meter management method, comprising: issuing damage information to the outside when the damage assessment value is equal to or greater than the threshold value; The gas meter management method, wherein determining the damage status to the gas meter includes determining whether the gas meter has been crushed by the furniture based on the gas flow rate.

9. acquiring detection information detected by sensors, the detection information including acceleration sensor information relating to vibrations of the gas meter, pressure sensor information relating to the pressure of the gas in a pipe through which the gas flows, and ultrasonic sensor information relating to ultrasonic signals in the pipe; a step of determining whether or not damage to the gas meter and collapse of the house have occurred based on the detection information; calculating a damage assessment value indicating the urgency of sending damage information to an outside party based on the result of determining the damage situation; determining whether the damage assessment value is equal to or greater than a threshold value stored in advance in a storage unit; and issuing damage information to the outside when the damage assessment value is equal to or greater than the threshold value, A gas meter management program, wherein determining the damage status to the gas meter includes determining whether or not a house has collapsed based on the acceleration sensor information, the ultrasonic sensor information, and the pressure sensor information.

10. acquiring detection information detected by sensors, the detection information including acceleration sensor information relating to vibrations of the gas meter, pressure sensor information relating to the pressure of the gas in a pipe through which the gas flows, and ultrasonic sensor information relating to ultrasonic signals in the pipe; calculating a flow rate of the gas flowing in the pipe based on the ultrasonic sensor information; determining a damage state to the gas meter based on the detection information and the gas flow rate; calculating a damage assessment value indicating the urgency of sending damage information to an outside party based on the result of determining the damage situation; determining whether the damage assessment value is equal to or greater than a threshold value stored in advance in a storage unit; and issuing damage information to the outside when the damage assessment value is equal to or greater than the threshold value, The gas meter management program, wherein determining the damage status to the gas meter includes determining whether the gas meter has been crushed by the furniture based on the gas flow rate.

Images