Safety confirmation system

Abstract

To provide a safety confirmation system capable of confirming the safety of persons to be confirmed in the event of a disaster.SOLUTION: A safety confirmation system includes: a measuring unit 3 that measures a gas flow rate; a state switching unit 4 that can switch between a supply state where gas is supplied and a shut-off state where a gas supply channel 2 is shut off; a disaster occurrence information input unit 12 that allows disaster occurrence information to be input in the event of a disaster; a communication unit 6, which is a transmission unit that transmits safety information to a confirming person terminal M; and a control unit H that controls state switching unit 4 and communication unit 6. The control unit H executes a shut-off control that switches the state switching unit 4 from the supply state to the shut-off state on the condition that the disaster occurrence information is input to the disaster occurrence information input unit 12, and executes a safety information transmission control to transmit safety information from the communication unit 6 to the confirming person terminal M when a safety confirmation condition is satisfied that human operation to use gas appliances has been performed after the execution of the shut-off control.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a safety confirmation system including a measuring unit that measures the flow rate of gas flowing through a gas supply line inside a house. [Background technology]

[0002] Patent Document 1 discloses a safety confirmation system that includes a measuring unit that measures the gas flow rate in a gas supply line and a transmitting unit (communication device 1) that transmits information to a confirming terminal (confirming terminal 3) used by a confirming person to confirm the safety of the person being confirmed. In this safety confirmation system, if the gas usage (relative gas usage) during a fixed period based on measurements by the measuring unit is close to 0 m3, the transmitting unit transmits a monitoring request notification A0 to the confirming terminal 3, indicating that something may be wrong with the person being confirmed. The monitoring request notification A0 transmitted from the transmitting unit is then received by a center 2, which transmits a monitoring notification A1 to the confirming terminal upon receiving the monitoring request notification. By receiving the monitoring notification A1, the confirming terminal is able to know that something may be wrong with the person being confirmed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-191304 Summary of the Invention [Problem to be solved by the invention]

[0004] However, it is conceivable that such a person who is checking would like to be sure that the person being checked is safe in the event of a disaster, but the safety confirmation system described above does not allow the person to know that the person being checked is safe in the event of a disaster.

[0005] In view of this situation, a main object of the present invention is to provide a safety confirmation system that can confirm the safety of a person to be confirmed when a disaster occurs. [Means for solving the problem]

[0006] A first characteristic configuration of the present invention is a gas supply system including: a measuring unit that measures a gas flow rate flowing through a gas supply path in a home; a state switching unit that can switch between a supply state in which gas is supplied to a gas appliance in the home through the gas supply path and a cut-off state in which the gas supply path is cut off; a disaster occurrence information input unit into which disaster occurrence information is input when a disaster occurs; a transmitting unit that transmits safety information to a verifying terminal used by a verifying person who verifies the safety of the person to be verified; a control unit that controls the state switching unit and the transmission unit, The control unit executes cutoff control to switch the state switching unit from the supply state to the cutoff state on condition that the disaster occurrence information is input to the disaster occurrence information input unit; The feature is that when the safety confirmation condition for determining that manual operation has been performed to use the gas equipment after the shut-off control is executed is met, safety information transmission control is executed to transmit the safety information from the transmission unit to the checker terminal.

[0007] According to this configuration, in the event of a disaster, disaster occurrence information is input to the disaster occurrence information input unit, causing the control unit to execute cut-off control and switch the state switching unit to the cut-off state, thereby cutting off the supply of gas to gas appliances in the home. If the safety confirmation information is met after the shut-off control is executed, it is assumed that the person being confirmed has manually operated the gas equipment in the home to use it, and in this case it can be determined that the person being confirmed is safe after a disaster has occurred. In this way, if the safety confirmation conditions are met after the gas supply is cut off, the control unit executes safety information transmission control, and safety information is sent to the verifier terminal, so that the verifier can confirm the safety of the person being verified using the safety information received at the verifier terminal. Therefore, it is possible to provide a safety confirmation system that can confirm the safety of a person to be confirmed in the event of a disaster.

[0008] A second characteristic configuration of the present invention is a system including a manual operation information input unit to which manual operation information is input when a manual operation is performed on a manual operation unit provided in a home, the control unit executes a restoration control for switching the state switching unit from the interruption state to the supply state on the condition that the manual operation information is input to the manual operation information input unit, The safety confirmation condition includes a first condition under which the return control is executed in response to input of the manual operation information after the cutoff control is executed.

[0009] According to this configuration, when the state switching unit is switched to the cut-off state, the manual operation unit can be manually operated to execute recovery control of the control unit and switch the state switching unit to the supply state, thereby resuming the supply of gas to the gas equipment in the home. If the manual operation unit is manually operated in this manner to execute the recovery control of the control unit (if the first condition is met), it is assumed that the manual operation unit was operated by the person being verified in order to use the gas equipment in the home, and in this case it can be more appropriately determined that the verifying person is safe. In this way, when the first condition is satisfied, the safety information transmission control is executed by the control unit, and the checker can more appropriately check the safety of the person to be checked using the safety information received at the checker terminal.

[0010] In a third characteristic configuration of the present invention, the control unit executes a return control for switching the state switching unit from the interruption state to the supply state, The safety confirmation conditions include a second condition in which the return control is executed after the shut-off control is executed, and the flow rate of gas used by the person in charge is determined to be an operation on the gas equipment after the return control is executed, and is measured by the measuring unit.

[0011] According to this configuration, when the state switching unit is switched to the cut-off state, the control unit is controlled to restore the supply of gas to the gas appliances in the home, thereby allowing the supply of gas to be resumed. Then, if the flow rate of gas used manually is measured by the measuring unit after the recovery control is executed in this manner (if the second condition is met), it is assumed that the gas equipment has been manually operated, and in this case it can be more appropriately determined that the person being confirmed is safe. In this way, when the second condition is satisfied, the safety information transmission control is executed by the control unit, and the checker can more appropriately check the safety of the person to be checked using the safety information received at the checker terminal.

[0012] A fourth characteristic configuration of the present invention is that, under the second condition, a gas flow rate equal to or greater than a preset set flow rate is determined to be the artificially used gas flow rate.

[0013] According to this configuration, for example, when a gas appliance such as a household fuel cell cogeneration system that is not manually operated and that produces a gas flow rate less than the set flow rate is used, the second condition can be ensured not to be satisfied, and when a gas appliance such as a gas stove or water heater that is manually operated and that produces a gas flow rate equal to or greater than the set flow rate is used, the second condition can be ensured to be satisfied. Thus, it is easy to determine whether a gas flow is being manually used under the second condition.

[0014] A fifth characteristic configuration of the present invention is that, in the second condition, the artificial use gas flow rate is determined based on use information indicating the use of the gas.

[0015] According to this configuration, the artificial use gas flow rate can be determined based on the use information indicating the purpose of use of the gas (which gas appliance) the gas flow rate is generated by, thereby making it possible to more accurately determine the artificial use gas flow rate under the second condition. [Brief explanation of the drawings]

[0016] [Figure 1] Safety confirmation system overview [Figure 2] Control flow chart of the control unit of the safety confirmation system in the event of an earthquake DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of a safety confirmation system according to the present invention will be described with reference to the drawings. Fig. 1 is a schematic diagram of a safety confirmation system A according to the present invention. As shown in Fig. 1, the safety confirmation system A is equipped with a gas meter 1 installed in a residence, and this gas meter 1 is communicably connected to a management center S that manages the gas meter 1 and a verifier terminal M of a verifier via a network line N such as an internet line or a telephone line. The verifier is someone who verifies the safety of the person to be verified, and the person to be verified is a resident of the residence in which the gas meter 1 is installed.

[0018] The safety confirmation system A is equipped with a measuring unit 3 that measures the gas flow rate flowing through a gas supply line 2 within the house, a state switching unit 4 that can switch between a supply state in which gas is supplied to gas equipment (not shown) within the house through the gas supply line 2 and a cut-off state in which the gas supply line 2 is cut off, a disaster occurrence information input unit 12 into which disaster occurrence information is input in the event of a disaster, a communication unit 6 as a transmitting unit that transmits safety information to a checker terminal M used by the checker, and a control unit H that controls the state switching unit 4 and the communication unit 6.

[0019] In this embodiment, the measurement unit 3, state switching unit 4, disaster occurrence information input unit 12, communication unit 6, and control unit H are provided in the gas meter 1. The gas meter 1 also includes a seismic sensor 7 that detects earthquakes, a display unit 8 that is provided in the gas meter 1 so as to be visible from outside the housing of the gas meter 1, a memory unit 9 that can store various information, and a reset switch 11 that can be manually operated to reset the state switching unit 4 from the shut-off state to the supply state. The communication unit 6 is configured to be able to send and receive information to and from the management center S and the verifying terminal M via a network line N or the like.

[0020] The measuring unit 3 is configured with an ultrasonic flow sensor or the like that measures the flow rate of gas flowing through the gas supply path 2, and is configured to transmit information on the measured gas flow rate to the control unit H. The control unit H then calculates an integrated value of the gas flow rate measured by the measuring unit 3, and controls the display unit 8 so that the integrated value is displayed on the display unit 8.

[0021] The state switching unit 4 is composed of an electromagnetic shut-off valve installed upstream of the installation location of the measuring unit 3 in the gas supply line 2, and is configured to be able to switch between a supply state and a shut-off state by opening and closing the shut-off valve. The seismic sensor 7 is configured with an acceleration sensor that measures acceleration in three axial directions, and when it detects an earthquake, it transmits earthquake occurrence information indicating that an earthquake has occurred to the control unit H. When the earthquake occurrence information is input, the control unit H executes cutoff control to switch the state switching unit 4 from the supply state to the cutoff state. In addition, when an earthquake (an example of a disaster) occurs, earthquake occurrence information (an example of disaster occurrence information) is input to the control unit H, and the control unit H functions as a disaster occurrence information input unit 12 to which disaster occurrence information is input when a disaster occurs.

[0022] When the gas meter 1 detects an earthquake and shuts off the gas supply (when shutoff control is executed), if the seismic sensing unit 7 does not detect an earthquake of the disaster seismic intensity (a seismic intensity set as an earthquake corresponding to a disaster) within a set time after the earthquake is detected, the gas meter 1 has a function of automatically executing return control to switch the state switching unit 4 from the shutoff state to the supply state. Specifically, if the seismic sensing unit 7 does not detect an earthquake of the disaster seismic intensity (e.g., seismic intensity 5) within a set time (e.g., one minute) after the first earthquake is detected by the seismic sensing unit 7, and if a set condition is met (e.g., the pressure value detected by a pressure sensor (not shown) that detects the gas pressure in the gas supply line 2 is within a normal range), the control unit H automatically executes return control, and the state switching unit 4 switches from the shutoff state to the supply state. On the other hand, if the seismic sensing unit 7 detects an earthquake of the disaster seismic intensity within the set time after the first earthquake is detected, the return control as described above is not executed, and the state switching unit 4 remains in the shutoff state.

[0023] The reset switch 11 is a switch for switching the state switching unit 4 from the cut-off state to the supply state when the state switching unit 4 is maintained in the cut-off state as described above, and corresponds to a manual operation unit provided in the home. The person to be confirmed can manually operate the reset switch 11 to switch the state switching unit 4 from the cut-off state to the supply state. To explain further, the return switch 11 is configured to transmit manual operation information indicating that the return switch has been operated to the control unit H when it is manually operated, and the control unit H is configured to execute return control when the manual operation information is input to the control unit H. As described above, the restoration operation for switching the state switching unit 4 from the cut-off state to the supply state can be performed by manually operating the restoration switch 11, but it can also be performed by remote operation from the management center S. Specifically, when the person to be identified requests the management center S to perform a restoration operation by telephone or the like, the management center S transmits remote operation information to the gas meter 1 for switching the state switching unit 4 of the gas meter 1 of the person to the supply state. When the communication unit 6 receives the remote operation information from the management center S, the control unit H of the gas meter 1 executes restoration control. When a return switch 11 (manual operation unit) provided in the house is manually operated, manual operation information is input to the control unit H, which has the function of a manual operation information input unit 13 to which the manual operation information is input. Also, remote operation information from the management center S is input to the control unit H, which has the function of a remote operation information input unit 14 to which the remote operation information is input.

[0024] The storage unit 9 stores identification information of the gas meter 1 in which the storage unit 9 is provided and management center information regarding the management center S. The control unit H transmits various information together with the identification information to the management center S. Specifically, for example, the control unit H transmits information on the integrated value together with the identification information to the management center S at predetermined intervals (for example, once a month). Also, for example, when the control unit H has performed cut-off control, it transmits information indicating that the cut-off control has been performed together with the identification information to the management center S. Furthermore, when the safety confirmation conditions are satisfied after the execution of the cutoff control, the control unit H transmits safety information from the communication unit 6 to the checker terminal M. In this way, the communication unit 6 is also used when transmitting safety information to the checker terminal M, and corresponds to a transmission unit that transmits safety information.

[0025] The control unit H executes a cutoff control, a recovery control, and a safety information transmission control. The cutoff control is a control for switching the state switching unit 4 from a supply state to a cutoff state, and the control unit H executes the cutoff control on the condition that disaster occurrence information is input to the control unit H (disaster occurrence information input unit 12). In this embodiment, earthquake occurrence information input from the seismic sensor unit 7 is used as the disaster occurrence information, and the control unit H executes the cutoff control on the condition that earthquake occurrence information is input to the control unit H.

[0026] The restoration control is a control for switching the state switching unit 4 from the cutoff state to the supply state. The control unit H executes the restoration control on the condition that manual operation information is input to the control unit H (manual operation information input unit 13), that remote operation information is input to the control unit H (remote operation information input unit 14), or that no earthquake with the disaster set seismic intensity is detected after the detection of an earthquake. In this embodiment, the control unit H executes the return control on the condition that operation information of the return switch 11 is input. The control unit H also executes the return control on the condition that remote operation information by remote operation from the management center S is input. Furthermore, the control unit H executes the return control on the condition that an earthquake with the set disaster seismic intensity is not detected within a set time after the detection of an earthquake.

[0027] The safety information transmission control is a control for transmitting safety information from the communication unit 6 to the inspector terminal M, and the control unit H executes the safety information transmission control when the safety confirmation conditions for determining that manual operation has been performed to use the gas equipment after the shut-off control is executed are met. The safety confirmation conditions include a first condition that restoration control is executed due to input of manual operation information after execution of shutoff control, and a second condition that, after execution of restoration control, an artificially used gas flow rate that is determined to be a manual operation on the gas appliance is measured by the measuring unit 3. In this embodiment, the control unit H executes safety information transmission control when both the first condition and the second condition are satisfied. To explain further, the control unit H satisfies the first condition by executing the return control when return information is input to the control unit H by manually operating the return switch 11, and after executing the return control in this manner, if the flow rate of the artificially used gas is measured by the measuring unit 3 and the second condition is satisfied, the control unit H executes the safety information transmission control. In this embodiment, gas appliances installed in a house, such as a gas stove, a gas fan heater, etc., are defined as gas appliances. Manual operation of the gas appliances refers to operation of the reset switch 11 of the gas meter 1 to use the gas appliance, or direct manual operation of the gas appliance.

[0028] In this embodiment, in the second condition, a gas flow rate equal to or greater than a preset set flow rate is determined to be the artificially used gas flow rate. Specifically, the set flow rate is set to a gas flow rate that exceeds the gas flow rate normally used by a residential fuel cell cogeneration system such as an ENE-FARM (registered trademark) that is not operated manually. Therefore, after the execution of the recovery control, the second condition is not met when only non-manual gas appliances are operating. However, the second condition is met when gas is measured at a rate above the set flow rate by operating a manually operated gas appliance such as a gas stove in addition to the non-manual gas appliances, or when gas is measured at a rate above the set flow rate by operating only manually operated gas appliances. Note that the set flow rate may be configured to be changeable to any value.

[0029] When the management center S receives safety information from the gas meter 1, it transmits the safety information to the checker terminal M that is stored in association with the gas meter 1. In this way, in this embodiment, the safety information from the communication unit 6 is transmitted to the checker terminal M via the management center S.

[0030] An app for checking safety information is installed on the checker terminal M. This app for checking safety information is configured to display information indicating that the person to be checked is safe on the screen of the checker terminal M when the checker terminal M on which the app is installed receives safety information. The verifying terminal M may be a mobile phone such as a smartphone or a tablet terminal.

[0031] Next, the control of the control unit H of the gas meter 1 when an earthquake occurs will be described with reference to the flowchart shown in FIG. As shown in Fig. 2, if the seismic sensor unit 7 detects an earthquake (Yes in step #1), it executes shutoff control (step #2). If the seismic sensor unit 7 detects an earthquake with the disaster-specified seismic intensity before the set time has elapsed after executing the shutoff control (Yes in step #3), the state switching unit 4 maintains the shutoff state. If manual operation information is input by operating the return switch 11 in this state (Yes in step #5), it executes return control (step #7). In this state where the return control is executed by inputting manual operation information and the state switching unit 4 is switched to the supply state, if the measurement unit 3 detects a gas flow rate equal to or greater than the artificial gas flow rate (Yes in step #8), it executes safety information transmission control to transmit safety information to the checker terminal M (step #9).

[0032] Furthermore, if the seismic sensor 7 does not detect an earthquake of the disaster seismic intensity within the set time after detecting an earthquake (if Yes in step #1) (if No in step #3), it executes restoration control (step #4). Furthermore, if the state switching unit 4 maintains the shutdown state after executing shutdown control (#2) (if Yes in #3) and remote operation information is input from the management center S (if No in step #5, if Yes in step #6), it executes restoration control (step #4). If restoration control is executed in this way (if condition 1 is not satisfied), safety information transmission control is not executed even if the measurement unit 3 detects a gas flow rate equal to or greater than the artificial gas flow rate.

[0033] In this way, the control unit H of the safety confirmation system A executes the cutoff control on the condition that disaster occurrence information has been input to the control unit H (disaster occurrence information input unit 12), and then executes the restoration control when the restoration switch 11 is manually operated, and also executes the safety information transmission control to transmit safety information from the communication unit 6 to the confirming terminal M when the safety confirmation information is satisfied as a result of the flow rate of artificially used gas being measured by the measuring unit 3 after the execution of the restoration control. Therefore, the confirming person can confirm the safety of the person to be confirmed by the safety information received by the confirming terminal M.

[0034] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0035] (1) In the above embodiment, an example was described in which a gas flow rate equal to or greater than a preset set flow rate was determined to be the gas flow rate used by humans. However, the present invention is not limited to this configuration. For example, the gas flow rate used by humans may be determined based on usage information indicating the intended use of the gas. To further explain, a usage information output unit 16 (see FIG. 1) is provided that outputs information about the gas appliances being used. Based on the usage information from the usage information output unit 16, the control unit H may determine that the gas flow rate currently being measured is the gas flow rate used by humans if the gas appliances being used include gas appliances operated by humans, and may not determine that the gas flow rate currently being measured is the gas flow rate used by humans if the gas appliances being used do not include gas appliances operated by humans.

[0036] (2) In the above embodiment, an example was described in which safety information from the communication unit 6 was transmitted to the verifying terminal M via the management center S. However, the safety information from the communication unit 6 may be transmitted directly to the verifying terminal M without going through the management center S.

[0037] (3) In the above embodiment, the disaster occurrence information is earthquake occurrence information detected by the seismic sensor 7 installed in the gas meter, but is not limited to this configuration. For example, the disaster occurrence information may be a disaster other than an earthquake, such as a fire or tsunami, or may be obtained from a device installed outside the gas meter 1, such as a fire alarm, or may be a signal for remote operation by the management center S that determines that a disaster has occurred.

[0038] (4) In the above embodiment, the safety confirmation condition is considered to be satisfied when both Condition 1 and Condition 2 are satisfied. However, the present invention is not limited to this configuration. For example, the safety confirmation condition may be considered to be satisfied when only one of Condition 1 and Condition 2 is satisfied. Specifically, referring to the flowchart shown in FIG. 2, when the return control is executed by manually operating the return switch 11 and the first condition is satisfied (#7), the safety information transmission control (#9) may be executed regardless of the gas flow rate after the return control (even if the second condition is not satisfied). Furthermore, even if recovery control is performed by remote control or automatic recovery (if the first condition is not met, #4), the process may proceed to #8 and safety information transmission control may be performed if the gas flow rate after recovery control meets the second condition (if Yes in #8). [Explanation of symbols]

[0039] 2 Gas supply line 3. Measurement section 4. State switching section 6. Communication unit (transmitter) 11 Reset switch (manual operation part) 12 Disaster occurrence information input section 13 Manual operation information input section A Safety confirmation system H control section

Claims

1. a measuring unit that measures the gas flow rate flowing through a gas supply line in the home; a state switching unit that can switch between a supply state in which gas is supplied to a gas appliance in the home through the gas supply path and a cut-off state in which the gas supply path is cut off; a disaster occurrence information input unit into which disaster occurrence information is input when a disaster occurs; a transmitting unit that transmits safety information to a verifying terminal used by a verifying person who verifies the safety of the person to be verified; a control unit that controls the state switching unit and the transmission unit, The control unit executes cutoff control to switch the state switching unit from the supply state to the cutoff state on condition that the disaster occurrence information is input to the disaster occurrence information input unit; A safety confirmation system that performs safety information transmission control in such a way that if the safety confirmation conditions for determining that manual operation has been performed to use the gas equipment are not met after the shut-off control is executed, the safety information is not sent from the transmission unit to the verifier terminal, and if the safety confirmation conditions are met after the shut-off control is executed, the safety information is sent from the transmission unit to the verifier terminal.

2. A measuring unit that measures the gas flow rate flowing through a gas supply line inside a home; a state switching unit that can switch between a supply state in which gas is supplied to a gas appliance in the home through the gas supply path and a cut-off state in which the gas supply path is cut off; a disaster occurrence information input unit into which disaster occurrence information is input when a disaster occurs; a transmitting unit that transmits safety information to a verifying terminal used by a verifying person who verifies the safety of the person to be verified; a control unit that controls the state switching unit and the transmission unit, The control unit executes cutoff control to switch the state switching unit from the supply state to the cutoff state on condition that the disaster occurrence information is input to the disaster occurrence information input unit; When a safety confirmation condition for determining that a manual operation to use the gas appliance has been performed after the execution of the shutoff control is satisfied, a safety information transmission control is executed to transmit the safety information from the transmission unit to the checker terminal. a manual operation information input unit into which manual operation information is input when a manual operation is performed on a manual operation unit provided in the home; the control unit executes a restoration control for switching the state switching unit from the interruption state to the supply state on the condition that the manual operation information is input to the manual operation information input unit, A safety confirmation system, wherein the safety confirmation condition includes a first condition under which the return control is executed when the manual operation information is input after the shutoff control is executed.

3. A measuring unit that measures the gas flow rate flowing through a gas supply line inside a home; a state switching unit that can switch between a supply state in which gas is supplied to a gas appliance in the home through the gas supply path and a cut-off state in which the gas supply path is cut off; a disaster occurrence information input unit into which disaster occurrence information is input when a disaster occurs; a transmitting unit that transmits safety information to a verifying terminal used by a verifying person who verifies the safety of the person to be verified; a control unit that controls the state switching unit and the transmission unit, The control unit executes cutoff control to switch the state switching unit from the supply state to the cutoff state on condition that the disaster occurrence information is input to the disaster occurrence information input unit; When a safety confirmation condition for determining that a manual operation to use the gas appliance has been performed after the execution of the shutoff control is satisfied, a safety information transmission control is executed to transmit the safety information from the transmission unit to the checker terminal. the control unit executes a restoration control for switching the state switching unit from the interruption state to the supply state, A safety confirmation system in which the safety confirmation conditions include a second condition in which the return control is executed after the shut-off control is executed, and an artificially used gas flow rate that is determined to be due to human operation of the gas equipment is measured by the measuring unit after the return control is executed.

4. a manual operation information input unit into which manual operation information is input when a manual operation is performed on a manual operation unit provided in the home; the control unit executes a restoration control for switching the state switching unit from the interruption state to the supply state on the condition that the manual operation information is input to the manual operation information input unit, The safety confirmation system according to claim 1 , wherein the safety confirmation conditions include a first condition under which the return control is executed in response to input of the manual operation information after the cutoff control is executed.

5. the control unit executes a restoration control for switching the state switching unit from the interruption state to the supply state, A safety confirmation system as described in claim 1, 2 or 4, wherein the safety confirmation conditions include a second condition in which the return control is executed after the shut-off control is executed, and an artificial gas flow rate that is determined to be an artificial operation of the gas equipment after the return control is executed is measured by the measuring unit.

6. 6. The safety confirmation system according to claim 3, wherein, in the second condition, a gas flow rate equal to or greater than a preset set flow rate is determined to be the artificially used gas flow rate.

7. The safety confirmation system according to claim 3 or 5, wherein the second condition determines the artificial use gas flow rate based on use information indicating the use of the gas.

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