JP2005176473A - Gas-blast circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To predict the time when the battery of a gas-blast circuit breaker should be replaced and systematically and efficiently replace the gas-blast circuit breaker or the battery. <P>SOLUTION: The gas-blast circuit breaker is provided with a battery voltage detecting means 108, a temperature detecting means 112 for detecting the temperature in the place of installation, and a steady state detecting means 117. A control unit 116 periodically detects temperatures from the temperature detecting means 112. When the steady state detecting means 117 is outputting steady state signals, the battery voltage detecting means 108 detects the voltage of a battery and this voltage is stored in chronological order. When the detected temperature is equal to a predetermined temperature and the gradient of change in battery voltage becomes equal to or higher than a predetermined value, a communicating portion 106 and an announcing portion 105 announces that to the outside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a gas shut-off device that prevents a gas accident in advance.

  Conventionally, this type of gas shut-off device periodically detects the voltage of the battery that is the power source of the apparatus, and notifies the outside or shuts off the gas passage when the battery voltage falls below a predetermined value. (For example, refer to Japanese Patent Application Laid-Open No. H10-260688)

In FIG. 9, reference numeral 901 denotes a flow rate sensor that outputs a flow rate signal corresponding to the passing gas flow rate, 902 denotes a flow rate measuring unit that measures a passing flow rate from the flow rate signal of the flow rate sensor 901 and outputs a gas flow rate value, and 903 denotes a gas passage. A shut-off valve that opens and closes, 904 is a valve drive unit that drives the shut-off valve 903 to open and close, 905 is a notification unit that includes an LED and an LCD, 906 is a communication unit that communicates with the center and the like, and 907 is a power source for the gas shut-off device 908 is a voltage supply cut-off for supplying current to the pseudo-resistive load 909, 909 is a pseudo-resistive load designed to have a DC power equivalent to the shut-off valve load, and 910 is a voltage of the pseudo-load resistor 909 A voltage detection means 911 for measurement is a control unit composed of a microcomputer (CPU). The control unit 911 integrates the accumulated value stored inside based on the flow rate signal from the flow rate measuring unit 902, while the security data held inside based on the flow rate signal from the flow rate measuring unit 902 and When it is determined that the value is abnormal such as gas leakage, the valve drive unit 904 is driven to operate the shut-off valve 903, the gas passage is closed to ensure the safety of the gas, and the content is notified by the notification unit 905, A communication unit 906 notifies the center or the like remotely. Further, when the control unit 911 operates the voltage supply unit 908 in a predetermined cycle to energize the pseudo-resistive load 909 and measures the voltage of the pseudo-load resistor 909 at that time with the voltage detecting unit 910, when the voltage drops below the specified voltage for a predetermined number of times The notification unit 905 notifies the user.
Japanese Patent Laid-Open No. 2002-40063

  However, in the conventional gas shut-off device, the battery of the gas shut-off device measures whether or not the shut-off valve can be operated at a predetermined voltage regardless of the ambient temperature where the gas shut-off device is installed. When there is a notification from the notification unit, it is necessary to quickly replace the gas shut-off device or replace the battery. However, when the battery voltage drop notification time overlaps and the number of calls increases, it may not be possible to replace the gas shutoff device or replace the battery.

  The present invention solves the above-described conventional problems, and predicts the battery life of a gas shut-off device by accurately measuring the voltage of the battery under a predetermined temperature and in a steady state where there is no fluctuation due to the load of the battery. It is an object of the present invention to provide a systematic and efficient replacement of the gas shutoff device and battery replacement based on the prediction result.

  In order to solve the above-described conventional problems, the gas shutoff device of the present invention includes a battery voltage detection means, a temperature detection means for detecting the temperature of the installation location, and a predetermined period of time after the battery is driven by a large current such as a shutoff valve. A steady-state detection means for outputting a steady-state signal during operation, and the controller periodically detects the temperature from this temperature detection means, and the steady-state signal is output from the steady-state detection means when a predetermined temperature is reached. If the battery voltage detecting means detects the voltage, the voltage is stored in time series, and when the change gradient of the battery voltage exceeds a predetermined value, the communication unit or the notification unit notifies the outside. Thus, it is possible to predict the battery replacement time or the gas shut-off device replacement time, and to efficiently plan where and where the gas shut-off device or battery is to be replaced.

  The gas shut-off device of the present invention predicts the battery life by measuring the battery voltage in a state where the battery voltage does not fluctuate due to a constant temperature and the load of the battery voltage, and predicts the battery life to replace the battery of the gas shut-off device. Can be predicted in advance, and the replacement of the gas cutoff device and the battery can be performed in a planned and efficient manner.

  According to a first aspect of the present invention, there is provided a flow rate sensor that outputs a flow rate signal corresponding to a passing gas flow rate, a flow rate measuring unit that measures a passing flow rate from the flow rate sensor signal and outputs a gas flow rate, and a shut-off valve that opens and closes the gas passage A valve drive unit that opens and closes the shut-off valve, a communication unit that communicates with the outside, a notification unit that performs display on the outside, a battery as a circuit power supply of the device, and a battery voltage of the battery Battery voltage detection means, temperature detection means for detecting the temperature of the installation location, and steady state detection means for outputting a steady state signal when a predetermined period has elapsed since the battery has been driven by a large current such as the shut-off valve And the integrated value stored internally based on the flow rate signal from the flow rate measuring unit, while the gas flow rate compared with the safety data stored internally based on the flow rate signal from the flow rate measuring unit The valve drive unit when the value is abnormal The battery voltage is detected when the gas passage is closed by driving and the temperature detecting means periodically detects the temperature, and when the detected temperature is a predetermined temperature and a steady state signal is output from the steady state detecting means. The battery voltage is detected by the means and stored in a time series, and when the change gradient of the battery voltage exceeds a predetermined value, the communication unit and / or the notification unit is provided with a control unit, and a replacement time is provided. Therefore, it is possible to efficiently plan when and where to replace the gas shut-off device or battery. I am doing so.

  A second invention includes a storage unit for storing temperature data, battery voltage, and time for a predetermined period, and a change gradient determination value holding unit that can set a predetermined value of the change gradient of the battery voltage from the outside. The voltage detected by the means and the temperature and time at that time are stored in the storage unit, the data in the storage unit are communicated to the outside from the communication unit, and a predetermined value of the change gradient of the battery voltage is held from the outside. If you want to change the change slope judgment value by judging this information in time series on the center side, that is, if you want to adjust the margin period of the battery replacement time, change slope judgment value Can be changed.

  The third invention is provided with a set temperature holding means capable of setting a predetermined temperature when measuring the battery voltage from the outside. A gas shut-off device is installed to measure the battery voltage for each environmental temperature or for each season. The voltage can be specified from the center.

  In the fourth aspect of the invention, the battery voltage is measured when a current is passed through the load resistance when the battery voltage is measured by the battery voltage detecting means. The load is optimal for measuring the battery voltage gradient. If the resistance is selected, the life of the battery voltage can be estimated with high accuracy, and the replacement timing of the gas shutoff device can be predicted.

  A fifth invention is a program for causing a computer to execute all or part of the procedure of any one of the first to fourth invention gas cutoff devices. And since it is a program, a part or all of the gas cutoff device of this invention can be easily implement | achieved using a general purpose computer or a server. Also, program distribution and installation can be simplified by recording on a recording medium or distributing a program using a communication line.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a block diagram of a gas shut-off device according to a first embodiment of the present invention. In FIG. 1, 101 is a flow rate sensor that outputs a flow rate signal corresponding to the flow rate of the passing gas, 102 is a flow rate measuring unit that measures the flow rate of the passing gas from the flow rate signal of the flow rate sensor 101, and outputs a gas flow rate value. A shut-off valve that opens and closes, 104 is a valve drive unit that drives the shut-off valve 103 to open and close, 105 is a notification unit configured by an LED and an LCD, 106 is a communication unit that communicates with the center, and 107 is a power source for the device Battery 108 is a voltage supply means 109 and a battery voltage detection means configured by A / D conversion, 109 is a voltage supply means configured by a resistor and a transistor to turn on / off the transistor at the time of voltage measurement, 111 is a voltage supply means 109 A / D conversion for transmitting the voltage when the signal is turned on to the control unit (CPU), 112 is a voltage supply means 113 and a regulator, and the thermistor 114 and A A temperature detection means constituted by D conversion, 113 is constituted by a resistor and a transistor, voltage supply means for turning on / off the transistor at the time of temperature measurement, 114 is a thermistor resistance as a temperature sensor, and 115 is a voltage supply means 113 turned on. A / D conversion for transmitting the voltage of the thermistor to the control unit (CPU) as temperature data, 117 is a steady state when the timer 118 starts counting when the valve driving unit 104 is driven and the timer 118 counts up for a predetermined time A steady-state detection unit 116 that outputs a signal is a control unit 116 that includes a CPU (microcomputer).

  Here, the control unit 116 integrates the integrated value stored inside based on the gas flow rate value from the flow rate measuring unit 102, while holding it internally based on the gas flow rate value from the flow rate measuring unit 102. When it is determined that the value is abnormal, such as gas leakage, compared with the safety data, the valve drive unit 104 is driven to operate the shut-off valve 103 to close the gas passage to ensure gas safety. Notification is given by the notification unit 105, and the communication unit 106 notifies the center or the like remotely.

  Further, the control unit 116 turns on the voltage supply unit 113 of the temperature detection unit 112 periodically (every hour) to energize the thermistor 114 through a regulator, and converts the thermistor voltage from the A / D converter 115 as temperature data. If the steady-state signal is output from the steady-state detection unit 117 that matches a predetermined temperature (for example, 10 ° C.), the voltage supply unit 109 of the battery voltage detection unit 108 is turned on and the A / D conversion 111 starts. The battery voltage is read, and if the difference ΔV from the previously read battery voltage is equal to or greater than a predetermined value (for example, 0.1 V), the content is notified by the notification unit 105, and the communication unit 106 is remotely notified to the center or the like. ing.

  FIG. 2A shows the characteristics of battery capacity and battery voltage. In the case of this embodiment, since there is no special load, it has a characteristic of a discharge curve at the time of a circuit load, and has a characteristic that a voltage gradient becomes larger as it approaches the end of life. If the previous measurement voltage is 3.00V and the battery voltage at the current measurement is 2.9V, ΔV = 0.1V, which is notified by the notification unit 105 and remotely notified to the center or the like by the communication unit 106. . Also, assuming that the minimum operating voltage (2.0V) of the gas shut-off device is a one-dot broken line, as shown in the discharge curve at a predetermined temperature in FIG. 2 (a), how many batteries until this ΔV reaches the minimum operating voltage. It can be estimated whether there is a lifetime.

  FIG. 2B is a graph showing the battery voltage behavior before and after driving the shut-off valve. As shown in the figure, when driving a portion where a large current flows, such as the shut-off valve, the battery voltage temporarily decreases. Therefore, the count-up value of the timer of the steady state detecting means is set in consideration of the battery voltage recovery time.

  Note that the above-described control can be easily realized by using a calculation or determination function based on a program operation of the microcomputer, and FIG. 3 shows a program flowchart when the control unit 116 is operating. In process 301, it is checked whether or not a predetermined period (1 hour) has elapsed. If it has not elapsed, the passage of 1 hour is monitored again. If 1 hour has elapsed, the process proceeds to process 302. In process 302, temperature data is read from the temperature detection means 112, and in process 303, it is checked whether the temperature data is a predetermined temperature (10 ° C.) and whether a steady state signal is output from the steady state detection unit 117. Otherwise, return to the process 301 again. If it is 10 degreeC and a steady state, it will move to the process 304. FIG. In process 304, the battery voltage data from the battery voltage detection means 108 is read and stored, and the process proceeds to process 305. In step 305, it is determined whether or not the difference ΔV between the battery voltage of the previous measurement and the battery voltage of the current measurement is greater than or equal to a predetermined value. If it is within the predetermined value, the process returns to the process 301. If the value is equal to or greater than the predetermined value, the content is notified by the notification unit 105 and the communication unit 106 is remotely notified to the center or the like by processing 306.

(Embodiment 2)
FIG. 4 shows a block diagram of a gas shut-off device in the second embodiment of the present invention. In FIG. 4, 401 is a flow rate sensor that outputs a flow rate signal corresponding to the passing gas flow rate, 402 is a flow rate measuring unit that measures the passing gas flow rate from the flow rate signal of the flow rate sensor 401 and outputs a gas flow rate value, and 403 is a gas passage. A shut-off valve that opens and closes, 404 is a valve drive unit that drives the shut-off valve 403 to open and close, 405 is a notification unit that includes an LED and an LCD, 406 is a communication unit that communicates with the center and the like, and 407 is a power source for the device Battery 408 is a voltage supply means 409 and battery voltage detection means constituted by A / D conversion, 409 is constituted by a resistor and a transistor, voltage supply means for turning on / off the transistor at the time of voltage measurement, 411 is voltage supply means 409 A / D conversion for transmitting the voltage when the signal is turned on to the control unit (CPU), 412 is a voltage supply means 413 and a regulator, and the thermistor 414 and A Temperature detection means composed of D conversion, 413 is composed of a resistor and a transistor, and voltage supply means for turning on / off the transistor at the time of temperature measurement, 414 is a thermistor resistance as a temperature sensor, 415 is voltage supply means 413 is turned on A / D conversion for transmitting the voltage of the thermistor to the control unit (CPU) as temperature data, 419 starts a timer 420 when the valve drive unit 404 is driven, and is in a steady state when the timer 420 counts up for a predetermined time A steady state detection unit that outputs a signal, 416 is a control unit constituted by a CPU (microcomputer), 417 is battery voltage data read from the battery voltage detection means 408, and temperature data read from the temperature detection means 412 at that time A storage unit 418 for storing the time is transmitted from the communication unit 406 via the control unit 116. A change gradient determining value holding means for holding a gradient change judgment value sent.

  Here, the control unit 416 integrates the accumulated value stored in the inside based on the gas flow rate value from the flow rate measuring unit 402, while holding the internal value based on the gas flow rate value from the flow rate measuring unit 402. When it is determined that the value is an abnormal value such as a gas leak compared with the safety data, the valve driving unit 404 is driven to operate the shut-off valve 403 to close the gas passage to ensure the safety of the gas. The notification unit 405 provides notification, and the communication unit 406 provides remote notification to the center or the like.

  Further, the control unit 416 holds the change gradient determination value sent from the communication unit 406 in the change gradient determination value holding unit 418. Further, the control unit 416 periodically (once every hour) turns on the voltage supply unit 413 of the temperature detection unit 412 to energize the thermistor 414 through a regulator, and converts the thermistor voltage from the A / D converter 415 as temperature data. If the steady state signal is output from the steady state detection unit 419, the voltage supply unit 409 of the battery voltage detection unit 408 is turned on and the A / D conversion 411 is turned on. The battery voltage is read, the battery voltage data at that time, the temperature data read from the temperature detection means 412 and the time are stored, while the difference ΔV between the battery voltage read last time is held in the change gradient judgment value holding means 418. If it exceeds a predetermined value (for example, 0.15 V), the content is notified by the notification unit 405, and the communication unit 406 communicates remotely to the center or the like. It is.

  Further, in response to a request from the communication unit 406, the control unit 416 sends each data stored for a predetermined period (three months) to the center via the communication unit 406. On the center side, characteristics similar to those of the battery capacity and battery voltage shown in FIG. 2 (a) can be grasped for a long time, and the change gradient judgment value can be determined according to the construction system for battery replacement or gas shut-off device replacement. It can be changed from the center.

  Note that the above-described control can be easily realized by using a calculation or determination function based on a program operation of the microcomputer, and FIG. 5 shows a program flowchart when the control unit 416 is operating. The process 501 holds the voltage change gradient determination value sent from the outside via the communication unit 406 in the change gradient determination value holding unit 418. In process 502, if there is a request from the communication unit 406 from the outside, each data stored for a predetermined period (three months) is sent to the center via the communication unit 406. In process 503, it is checked whether or not a predetermined period (1 hour) has elapsed. If it has not elapsed, the passage of 1 hour is monitored again. If 1 hour has elapsed, the process proceeds to process 504. In process 504, temperature data is read from the temperature detection means 412, and in process 505, it is checked whether the temperature data is a predetermined temperature (10 ° C.) and whether a steady state signal is output from the steady state detection unit 419. Otherwise, the process returns to the process 501 again. If it is 10 degreeC and a steady state, it will move to the process 506. In process 506, the battery voltage data from the battery voltage detection means 508 is read and stored, and the process proceeds to process 507. In process 507, the battery voltage data, temperature data, and time at that time are stored in the storage unit 417. In step 508, it is determined whether or not the difference ΔV between the battery voltage of the previous measurement and the battery voltage of the current measurement is greater than or equal to the change gradient determination value stored in the change gradient determination value holding unit 418. If it is within the change gradient determination value, the process returns to the process 501. If the change gradient determination value is equal to or greater than the change gradient determination value, the content is notified by the notification unit 405 and the communication unit 406 notifies the center or the like remotely by processing 509.

(Embodiment 3)
FIG. 6 shows a block diagram of a gas shut-off device in the third embodiment of the present invention. In FIG. 6, reference numeral 601 denotes a flow rate sensor that outputs a flow rate signal corresponding to the passing gas flow rate, 602 denotes a flow rate measuring unit that measures a passing gas flow rate from the flow rate signal of the flow rate sensor 601 and outputs a gas flow rate value, and 603 denotes a gas passage. A shut-off valve that opens and closes, 604 is a valve drive unit that drives the shut-off valve 603 to open and close, 605 is a notification unit composed of an LED and an LCD, 606 is a communication unit that communicates with the center and the like, and 607 is a power source of the device A battery, 608 is a battery voltage detection means constituted by a voltage supply means 609 and A / D conversion, 609 is constituted by a resistor and a transistor, and is a voltage supply means for turning on / off the transistor at the time of voltage measurement, 611 is a voltage supply means 609 A / D conversion for transmitting a voltage when the signal is turned on to a control unit (CPU), 612 is a voltage supply means 613 and a regulator, and a thermistor 614 and A Temperature detection means composed of D conversion, 613 is composed of a resistor and a transistor and is a voltage supply means for turning the transistor ON / OFF at the time of temperature measurement, 614 is a thermistor resistance as a temperature sensor, 615 is a voltage supply means 613 is turned on A / D conversion that transmits the temperature of the thermistor as temperature data to the control unit (CPU), 618 starts a timer 619 when the valve drive unit 604 is driven, and is in a steady state when the timer 619 counts up for a predetermined time Steady state detection unit that outputs a signal, 616 is a control unit composed of a CPU (microcomputer), 617 holds a predetermined temperature when measuring the battery voltage sent from the communication unit 606 via the control unit 616 The set temperature holding means.

  Here, the control unit 616 integrates the accumulated value stored inside based on the gas flow rate value from the flow rate measuring unit 602, while holding it internally based on the gas flow rate value from the flow rate measuring unit 602. When it is determined that the value is abnormal such as gas leakage compared with the safety data, the valve drive unit 604 is driven to operate the shutoff valve 603 to close the gas passage to ensure the safety of the gas. The notification unit 605 provides notification, and the communication unit 606 notifies the center or the like remotely.

  Further, the control unit 616 stores temperature data when measuring the battery voltage sent from the outside via the communication unit 606 in the set temperature holding unit 617. Further, the control unit 616 periodically turns on the voltage supply unit 613 of the temperature detection unit 612 to energize the thermistor 614 via a regulator and converts the voltage of the thermistor from the A / D converter 615 as temperature data. Read and read the temperature data stored in the set temperature holding means 617. If the steady state signal is output from the steady state detection unit 618 in accordance with this temperature (for example, 5 ° C.), the voltage supply of the battery voltage detection means 608 is performed. The voltage of the battery is read from the A / D converter 611 by turning on the means 609, and if the difference ΔV from the previously read battery voltage exceeds a predetermined value (for example, 0.1V), the content is notified by the notification unit 605. The communication unit 606 notifies the center or the like remotely.

  Thereby, when the gas shut-off device is attached to a cold region or attached to a warm region, the temperature at which the battery voltage is measured can be set from the center or the setting device. Moreover, it becomes possible to set the temperature when measuring the battery voltage for each season from the center or the setting device.

  Note that the above-described control can be easily realized by using a calculation or determination function based on the program operation of the microcomputer, and FIG. 7 shows a program flowchart when the control unit 616 is operating. A process 701 holds the temperature value when measuring the battery voltage sent from the outside via the communication unit 606 in the set temperature holding unit 617. In process 702, it is checked whether or not a predetermined period (1 hour) has elapsed. If it has not elapsed, the passage of 1 hour is monitored again. If 1 hour has elapsed, the process proceeds to process 703. In process 703, temperature data is read from the temperature detection means 612, and in step 704, whether the temperature data is the temperature (5 ° C.) of the temperature data held in the set temperature holding means and a steady state signal is output from the steady state detection unit 618. If it is 5 ° C. and it is not in a steady state, the process returns to the process 701 again. If it is 5 degreeC and it is a steady state, it will move to the process 705. In process 705, the battery voltage data from the battery voltage detection means 608 is read and stored, and the process proceeds to process 706. In process 706, it is determined whether or not the difference ΔV between the battery voltage of the previous measurement and the battery voltage of the current measurement is greater than or equal to a predetermined value. If it is within the predetermined value, the process returns to step 701. If the value is equal to or larger than the predetermined value, the content is notified by the notification unit 605 and the communication unit 606 notifies the center or the like remotely by processing 707.

(Embodiment 4)
FIG. 8 shows a block diagram of a gas shut-off device in the fourth embodiment of the present invention. In FIG. 8, reference numeral 801 denotes a flow rate sensor that outputs a flow rate signal corresponding to the passing gas flow rate, 802 denotes a flow rate measuring unit that measures a passing gas flow rate from the flow rate signal of the flow rate sensor 801 and outputs a gas flow rate value, and 803 denotes a gas passage. A shut-off valve that opens and closes, 804 is a valve drive unit that drives the shut-off valve 803 to open and close, 805 is a notification unit that includes an LED and an LCD, 806 is a communication unit that communicates with the center and the like, and 807 is a power source for the device Battery 808 is a voltage supply means 809 comprising a voltage supply means 809, a resistance load 810, and A / D conversion, 809 is a voltage supply means comprising a resistor and a transistor and turning on / off the transistor when measuring voltage, 810 A resistance load that allows a current to flow when the voltage supply means 809 is turned on, and 811 is a control unit ( A / D conversion to be transmitted to PU), 812 is a voltage supply means 813 and a regulator, a thermistor 814 is a temperature detection means comprising A / D conversion, and 813 is a resistor and a transistor, and the transistor is turned on / off at the time of temperature measurement. 814 is a thermistor resistance as a temperature sensor, 815 is an A / D converter that transmits the voltage of the thermistor when the voltage supply means 813 is turned on as temperature data to a control unit (CPU), and 817 is a valve drive unit A steady state detection unit 816 that starts a timer 818 when the 804 is driven and outputs a steady state signal when the timer 818 counts up for a predetermined time. A control unit 816 includes a CPU (microcomputer).

  Here, the control unit 816 integrates the accumulated value stored inside based on the gas flow rate value from the flow rate measuring unit 802, while holding it internally based on the gas flow rate value from the flow rate measuring unit 802. When it is determined that the value is abnormal such as gas leakage compared to the safety data, the valve drive unit 804 is driven to operate the shut-off valve 803 to close the gas passage to ensure the safety of the gas. The notification unit 805 provides notification, and the communication unit 806 provides remote notification to the center or the like.

  Further, the control unit 816 periodically (once every hour) turns on the voltage supply unit 813 of the temperature detection unit 812 to energize the thermistor 814 via a regulator, and converts the thermistor voltage from the A / D converter 815 as temperature data. If the steady state signal is output from the steady state detection unit 817 when the temperature matches a predetermined temperature (for example, 10 ° C.), the voltage supply unit 809 of the battery voltage detection unit 808 is turned on to supply current to the resistance load 810. The voltage at both ends of the resistive load 810 is read from the A / D conversion 811. When the difference ΔV from the voltage read at the previous time becomes equal to or greater than a predetermined value (for example, 0.1V), the content is notified by the notification unit 805. The communication unit 806 notifies the center or the like remotely.

  Note that FIG. 2 shows a discharge curve at the time of circuit load + resistance load. By adjusting the value of the load resistance 810, ΔV can be accurately measured depending on the type of battery and the circuit load. Become.

  As described above, the gas shutoff device according to the present invention predicts the battery life by measuring the battery voltage in a state where there is no fluctuation due to the constant temperature and the load of the battery voltage, and predicts the battery life to shut off the gas. It is possible to predict the battery replacement time of the device in advance and replace the gas shutoff device or replace the battery systematically and efficiently, so it can be applied to the prediction of the battery life of battery-operated equipment affected by the temperature. .

Functional block diagram of the gas cutoff device in Embodiment 1 of the present invention (A) Characteristic graph of battery capacity and battery voltage of battery (b) Graph showing battery voltage behavior before and after shut-off valve driving Program flow chart of gas shut-off device in embodiment 1 of the present invention Functional block diagram of the gas cutoff device in Embodiment 2 of the present invention Program flow chart of gas shut-off device in embodiment 2 of the present invention Functional block diagram of the gas cutoff device in Embodiment 3 of the present invention Program flow chart of gas cutoff device in embodiment 3 of the present invention Functional block diagram of the gas cutoff device in Embodiment 4 of the present invention Functional block diagram of a conventional gas shut-off device

Explanation of symbols

101, 401, 601, 801 Flow rate sensor 102, 402, 602, 802 Flow rate measuring unit 103, 403, 603, 803 Shut-off valve 104, 404, 604, 804 Valve drive unit 105, 405, 605, 805 Notification unit 106, 406 , 606, 806 Communication unit 107, 407, 607, 807 Battery 108, 408, 608, 808 Battery voltage detection unit 112, 412, 612, 812 Temperature detection unit 116, 416, 616, 816 Control unit 117, 419, 618, 817 Steady state detection means 417 Storage unit 418 Change gradient determination value holding means 617 Set temperature holding means

Claims (5)

A flow rate sensor that outputs a flow rate signal corresponding to the flow rate of the passing gas, a flow rate measuring unit that measures a passing flow rate from the flow rate sensor signal and outputs a gas flow rate, a shutoff valve that opens and closes a gas passage, and opening and closing the shutoff valve A valve drive unit for driving, a communication unit for performing communication with the outside, a notifying unit for performing display on the outside, a battery as a circuit power supply of the device, a battery voltage detecting means for detecting a battery voltage of the battery, Temperature detection means for detecting the temperature of the installation site, steady state detection means for outputting a steady state signal when the battery has been driven for a large period of time, such as the shutoff valve, and the flow rate measurement section The accumulated value stored inside is integrated based on the flow rate signal from the gas flow, while the gas flow value is abnormal compared to the safety data stored internally based on the flow rate signal from the flow measurement unit. Gas is driven by driving the valve drive unit. The temperature is periodically detected by the temperature detecting means, and the battery voltage is detected by the battery voltage detecting means when the detected temperature is a predetermined temperature and a steady state signal is output from the steady state detecting means. A gas shut-off device provided with a control unit that detects and stores time-sequentially, and notifies the outside by the communication unit and / or the notification unit when the change gradient of the battery voltage exceeds a predetermined value. A storage unit that stores temperature data, battery voltage, and time for a predetermined period, and a change gradient determination value holding unit that can set a predetermined value of the change gradient of the battery voltage from the outside, and the control unit includes the voltage detected by the battery voltage detection unit, The temperature and time at that time are stored in the storage unit, data in the storage unit is communicated to the outside from the communication unit, and a predetermined value of the change gradient of the battery voltage is externally held in the change gradient determination value holding unit. The gas shut-off device according to claim 1. The gas cutoff device according to claim 1 or 2, further comprising a set temperature holding means capable of setting a predetermined temperature from the outside when measuring the battery voltage. The gas cutoff device according to any one of claims 1 to 3, wherein the battery voltage detection means measures a voltage when a current is passed through a predetermined load resistance. The program for making a computer implement | achieve all or one part of the functions of the gas cutoff device of any one of Claims 1-4.

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