JP5222085B2 - Earthquake signal processing apparatus and earthquake signal processing method - Google Patents

Description

  The present invention relates to an earthquake signal processing apparatus and an earthquake signal processing method for cutting off gas supply in response to an earthquake.

Conventionally, various types of gas are used in factories such as semiconductor factories, and when an earthquake is detected, the shutoff valve of the cylinder filled with such gas is closed to shut off the gas flow path. Techniques for such control have been proposed.
For example, Patent Document 1 proposes a device that controls an electric signal to close a shut-off valve of a gas flow path and release residual gas to the atmosphere when the seismometer detects an earthquake.
In Patent Document 2, in the conventional gas supply system, since the seismometer device closes the shut-off valve after detecting the S wave (main motion), a large shaking occurs before the gas supply is actually shut off. Focusing on the danger, there has been proposed a device that closes the shut-off valve by detecting a P wave (initial fine movement) that reaches before the S wave.
In Patent Document 3, it is determined whether or not the shutoff valve provided in the gas flow path is closed according to the seismic intensity of the detected earthquake and the gas flow rate at that time, and the shutoff valve is operated according to the judgment result. There has been proposed a device to be used.
By the way, in a factory that uses such gas supply from a cylinder, a cylinder cabinet that is a storage in which a plurality of cylinders are stored is generally used. Such a cylinder cabinet has functions such as a gas purge with nitrogen gas, an exhaust system, and a fireproof structure. In addition, by operating the operation unit installed outside the storage, it is possible to open and close the shut-off valve for each cylinder stored, the shut-off valve to the gas supply destination, the shut-off valve for exhaust, etc. It has become.
Utility Model Registration No. 3023274 JP-A-6-160541 JP-A-8-329369

  However, the technique disclosed in Patent Document 2 is configured to detect the P wave (initial fine movement) and close the gas supply shut-off valve. However, the vibration detected by the seismometer device as the P wave is a fine movement. In some cases, it may be difficult to detect vibrations that are not correct, or to accurately predict the magnitude of the earthquake. Here, after shutting off the gas flow path, it takes a certain amount of time to restart the gas supply and return the gas flow path, and if the earthquake is detected incorrectly, the gas to be exhausted Since nitrogen gas for replacement is consumed more than necessary, it is not always efficient to close the gas flow path shut-off valve uniformly and completely shut off when the P wave is detected. Therefore, it is desirable that the gas flow path cuts only the necessary portion when necessary, and enables quick return when the detection of the P wave is incorrect.

  The present invention has been made in view of such circumstances. When an earthquake that affects gas supply is detected, the gas flow path is shut off quickly, but the detection of the earthquake is incorrect. An earthquake signal processing device and an earthquake signal processing method capable of promptly returning.

  In order to solve the above-described problem, the present invention supplies or blocks gas from a pipe to a gas supply destination in a gas supply system in which gas is supplied from a cylinder filled with gas to the gas supply destination through the pipe. A seismic signal processing apparatus for controlling opening and closing of a first shutoff valve and a second shutoff valve for supplying or shutting off gas from a cylinder to a pipe, and detecting a P wave due to an earthquake When a signal and an S wave detection signal indicating that an S wave due to an earthquake has been detected are input, and when a P wave detection signal is input from the input section, the first shut-off valve is closed and the gas A first shut-off control unit that shuts off the supply, a second shut-off control unit that shuts off the gas supply by closing the second shut-off valve when an S-wave detection signal is input from the input unit, and an input unit A P-wave detection signal is input, and the first cutoff control unit If the shut-off valve is not S-wave detection signal to the input unit after being closed input, characterized in that it comprises a return control unit for returning the supply of gas by opening the first shut-off valve closed, the.

  Further, according to the present invention, the above-described seismic signal processing apparatus is connected to the first cutoff valve and the second cutoff valve corresponding to the plurality of cylinders, and is associated with the type of gas filled in each of the plurality of cylinders. And a storage unit for storing a number of grace seconds until the first cutoff valve corresponding to the type of gas is closed after the P-wave detection signal is input. When a P-wave detection signal is input from the unit, the number of grace seconds corresponding to the type of gas charged in the cylinder is read from the storage unit, and after the time of the read grace time has elapsed, the first shut-off valve is turned on. It is characterized by blocking.

  Further, in the present invention, a predetermined set seismic intensity is stored in the storage unit described above, and the first cutoff control unit stores the predicted seismic intensity of the earthquake based on the input P wave detection signal and the storage unit. The set seismic intensity is compared, and when the predicted seismic intensity exceeds the set seismic intensity, the first shut-off valve is shut off.

  Further, according to the present invention, the above-described storage unit stores in advance a set expected number of seconds indicating a margin time for closing the shut-off valve before the earthquake arrives, and the first shut-off control unit receives the input P wave detection Compare the expected number of seconds until the earthquake corresponding to the signal arrives and the set expected number of seconds stored in the storage unit, and if the expected number of seconds is less than the set expected number of seconds, the first interruption The valve is shut off.

  In the present invention, the above-described earthquake signal processing device is connected to a plurality of seismometer devices that detect a P wave or an S wave and input the P wave detection signal or the S wave detection signal to an input unit, The first cutoff control unit closes the first cutoff valve when a P-wave detection signal is input to the input unit from a predetermined number of seismometer devices among a plurality of seismometer devices. Features.

  Further, according to the present invention, a P-wave detection signal distributed from the Japan Meteorological Agency and a cancel signal indicating that the P-wave detection signal was a false alarm are input to the input unit. When the P-wave detection signal is input to the first shut-off control unit and the first shut-off valve is closed, and then the cancel signal is input to the input unit, the closed first shut-off valve is opened and the gas It is characterized by returning the supply.

  Further, according to the present invention, the gas supply system described above includes an air cover attached to at least one of the cylinder body and the shutoff valve, and when a P-wave detection signal is input from the input unit, An air cover control unit for enclosing and inflating gas is provided.

  Further, the present invention provides a gas supply system in which gas is supplied from a cylinder filled with gas to a gas supply destination through a pipe, and a first cutoff valve that supplies or shuts off gas from the pipe to the gas supply destination; A P-wave detection signal indicating that a P-wave due to an earthquake has been detected at the input part of the earthquake signal processing device that controls the opening and closing of a second shut-off valve that supplies or shuts off gas from the cylinder to the pipe, or due to an earthquake When the S wave detection signal indicating that the S wave has been detected is input, and when the first cutoff control unit receives the P wave detection signal from the input unit, the first cutoff valve is closed and the gas A step of shutting off the supply of gas, a step of shutting off the gas supply by closing the second shutoff valve when the second cutoff control unit receives an S-wave detection signal from the input unit, and a return control unit includes: The P wave detection signal is input to the input unit, and the first And when the S-wave detection signal is not input to the input unit after the first shut-off valve is closed by the shut-off control unit, the step of opening the closed first shut-off valve and returning the gas supply is provided. Features.

  As described above, according to the present invention, in the gas supply system in which the gas is supplied from the cylinder filled with gas to the gas supply destination through the pipe, the gas is supplied to or shut off from the pipe to the gas supply destination. The seismic signal processing device that controls the opening and closing of the first shutoff valve and the second shutoff valve that supplies or shuts off gas from the cylinder to the pipe closes the first shutoff valve when a P-wave detection signal is input. When the gas supply is shut off and the S wave detection signal is input, the second cutoff valve is closed to shut off the gas supply, and after the P wave detection signal is input and the first cutoff valve is closed, When the S wave detection signal is not input, the gas supply is restored by opening the closed first shut-off valve. As a result, when the P-wave detection signal is received, the first shutoff valve is closed to shut off the gas supply to the gas supply destination, but the second shutoff valve is not closed and the gas from the cylinder to the pipe is closed. Since the supply of gas is not shut off, the gas in the pipe is kept, and when the S wave detection signal is not received after receiving the P wave detection signal, the closed first cutoff valve is opened. After receiving the signal, only the first shut-off valve is closed, the second shut-off valve from the cylinder to the pipe is not closed, and if the S-wave detection signal is not received, the first shut-off valve Is opened, and the supply of gas can be promptly restored.

  Further, according to the present invention, the delay time from when the P wave detection signal is received until the first shutoff valve corresponding to the cylinder is closed is associated with the type of gas filled in each of the plurality of cylinders. When the P-wave detection signal is received, the number of grace seconds corresponding to each gas of the plurality of cylinders is read, and after the time of the number of grace seconds read for each gas has elapsed, the first Since the shut-off valve is shut off, the opening and closing of the shut-off valve is controlled according to the type of gas, for example, the supply is shut off early or shut off relatively late according to the type of gas. It becomes possible.

  Further, according to the present invention, the predicted seismic intensity of the earthquake based on the input P-wave detection signal is compared with the preset seismic intensity stored in advance, and when the predicted seismic intensity exceeds the set seismic intensity, the first shut-off valve is shut off. Since it did, it can be controlled to shut off the first shut-off valve in accordance with a predetermined seismic intensity. Thereby, for example, when the predetermined seismic intensity is not exceeded, it is possible to perform control so that the control process of the shutoff valve is not performed more than necessary.

    Further, according to the present invention, the expected arrival seconds until the earthquake corresponding to the input P wave detection signal and the set expected seconds indicating the allowance time for closing the shut-off valve before the earthquake reaches are set. In comparison, when the estimated arrival time is less than or equal to the set expected number of seconds, the first shut-off valve is shut off, so that the first shut-off valve is shut off in accordance with the preset set expected number of seconds. Can be controlled. Thereby, for example, when the estimated arrival time exceeds a preset expected number of seconds, control can be performed so that the control process of the shut-off valve is not performed more than necessary.

  Further, according to the present invention, when a P wave or S wave is detected, a P wave is detected from a predetermined number or more of a plurality of seismometer devices that output a P wave detection signal or an S wave detection signal. When a signal is input, the first shut-off valve is closed. Therefore, if P wave detection signals are input to a number of seismometer devices that are less than the set number among a plurality of units, the P wave is erroneously input. As a result of the detection, it is possible to perform control so that the gas supply is not shut off by inadvertently closing the first shutoff valve.

  In addition, according to the present invention, the P wave detection signal distributed from the Japan Meteorological Agency and the cancel signal indicating that the P wave detection signal was a false alarm are input, and the P wave detection signal is input and the first cutoff is performed. When the cancel signal is received after the valve is closed, the gas supply is restored by opening the closed first shut-off valve. If the P-wave detection signal is false, carelessly It is possible to control to return the gas supply without closing the second shut-off valve.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration of a gas supply system 1 according to the present embodiment. The gas supply system 1 includes a receiving PC 400, a seismometer device 300 (a seismometer device 301, a seismometer device 302, a seismometer device 303), a seismic signal processing device 100, and a cylinder cabinet 200.

  The receiving PC 400 receives the earthquake early warning transmitted from the meteorological service support center of the Japan Meteorological Agency via the network. The Earthquake Early Warning is based on the result of an analysis by the Japan Meteorological Agency when an acceleration fluctuation of 100 gal or more is observed with a P wave or S wave at any observation point of the Japan Meteorological Agency seismograph device. This is an earthquake detection signal that is issued when the seismic center, magnitude, and predicted seismic intensity at each location are obtained, and the magnitude is 3.5 or higher, or the maximum predicted seismic intensity is 3 or higher. In addition, after the P wave detection signal is generated based on the processing result of only one observation point, if the second observation point is not processed even after a predetermined time has elapsed, the previous earthquake detection is detected as noise. Therefore, a cancel signal (cancellation report) is transmitted in about several seconds to several tens of seconds from the P-wave detection signal. Further, the P wave detection signal continues to be transmitted at regular intervals while the P wave is detected. Receiving PC 400 calculates the estimated arrival time of the earthquake, the predicted seismic intensity, and the like based on the received P-wave detection signal.

  The seismometer device 301, the seismometer device 302, and the seismometer device 303 are seismometer devices installed in the site of a factory in which the cylinder cabinet 200 is provided, such as an accelerometer, a displacement meter, and a speedometer. Detects a P wave or S wave shake due to an earthquake and outputs an earthquake detection signal. In the present embodiment, three seismometer devices 300 will be described as an example, but one or more seismometer devices 300 may be applied. Hereinafter, when the seismometer device 301, the seismometer device 302, and the seismometer device 303 are not distinguished, they will be described as the seismometer device 300.

  The cylinder cabinet 200 is a storage for storing one or more cylinders filled with gas, and has functions such as a gas purge with nitrogen gas, an exhaust system, and a fireproof structure. Further, by operating an operation unit installed outside the storage, it is possible to open and close a shut-off valve for each cylinder to be stored, a shut-off valve for a gas supply destination, a shut-off valve for exhaust, and the like. . In the present embodiment, a cylinder 201 and a cylinder 202 are accommodated in the cylinder cabinet 200. The cylinder 201 is connected to the piping via the shutoff valve 210. When the shutoff valve 210 is opened, the gas filled in the cylinder 201 is supplied to the pipe, and when the shutoff valve 210 is closed, the gas supply to the pipe is shut off.

  The cylinder 202 is connected to the pipe via the shut-off valve 211. When the shut-off valve 211 is opened, the gas filled in the cylinder 202 is supplied to the pipe, and when the shut-off valve 211 is closed, the gas supply to the pipe is shut off. The gas filled in the cylinder 201 and the cylinder 202 may be different types of gas. Here, the piping connected to the shut-off valve 210 and the shut-off valve 211 includes a shut-off valve 213 connected to the nitrogen gas supply source, and a shut-off valve 212 connected to an exhaust port that discharges gas to the atmosphere and exhausts it. A gas flow path is formed between the shutoff valve 214 connected to the gas supply destination.

The shut-off valves 210, 211, 212, 213, and 214 are connected to the control device 220, and control signals transmitted from the control device 220 are transmitted to the control signals. Based on this, the valve is opened and closed. In FIG. 1, piping that forms the gas flow path is indicated by a solid line, and a line that transmits a control signal from the control device 220 to the shutoff valve is indicated by a broken line.
Based on a control signal transmitted from the seismic signal processing apparatus 100 described later, the control device 220 sets a shut-off valve of the shut-off valve 210, the shut-off valve 211, the shut-off valve 212, the shut-off valve 213, and the shut-off valve 214. By opening and closing, the closing (shutoff valve closing) or opening (shutoff valve opening) of the gas flow path is controlled.

  The seismic signal processing apparatus 100 receives the P wave detection signal or the S wave detection signal received from the receiving PC 400 and the seismometer apparatus 300, and causes the control device 220 to transmit a control signal to the shutoff valve based on the received detection signal. The closing or opening of the gas flow path of the piping in the cylinder cabinet 200 is controlled. FIG. 2 is a diagram illustrating an example of the appearance of the earthquake signal processing apparatus 100. A display lamp 101 is provided on the external surface of the earthquake signal processing apparatus 100. The display lamp 101 includes a display area divided for each character string indicating the state of the seismic signal processing apparatus 100, and is configured so that a section corresponding to the operation state of the seismic signal processing apparatus 100 shines. The user can grasp the state of the earthquake signal processing apparatus 100 by visually checking the display lamp 101.

  FIG. 3 is a block diagram illustrating a configuration of the earthquake signal processing apparatus 100. The earthquake signal processing apparatus 100 includes the display lamp 101, the input terminal block 102, the output terminal block 103, the power supply 104, the power supply 105, the maintenance switch 106, the earthquake training switch 107, and the control unit 110. And a storage unit 111.

The input terminal block 102 is connected to the seismometer device 301, the seismometer device 302, the seismometer device 303, and the receiving PC 400, and receives the P wave detection signal or the S wave detection signal transmitted from these devices.
The output terminal block 103 is connected to the cylinder cabinet 200 and transmits a control signal for opening and closing the shutoff valve to the control device 220 of the cylinder cabinet 200.

  The power supply 105 and the power supply 104 supply power for operating the earthquake signal processing apparatus 100. The maintenance switch 106 and the earthquake training switch 107 are switches for setting that maintenance is being performed or training is being performed. For example, when these switches are ON, it is possible to perform settings such as not transmitting control signals from the output terminal block 103 to the cylinder cabinet 200.

  The storage unit 111 stores a preset seismic intensity. The set seismic intensity is information indicating a seismic intensity threshold value whether or not the seismic signal processing apparatus 100 performs control processing of the shutoff valve in accordance with the predicted seismic intensity based on the P wave detection signal input to the seismic signal processing apparatus 100. For example, when the predicted seismic intensity based on the input P-wave detection signal exceeds the set seismic intensity stored in the storage unit 111, the seismic signal processing apparatus 100 performs control processing of the shut-off valve, while setting If the seismic intensity is not exceeded, the shutoff valve control process is not performed.

  In addition, the storage unit 111 stores a set expected number of seconds indicating an allowance time for closing the shutoff valve before the earthquake arrives. The set expected number of seconds is a set time for comparison with the estimated number of seconds on the seismic signal processing apparatus side when the P wave is detected and the estimated number of seconds to reach the S wave is obtained by the receiving PC. For example, when the expected arrival time until an earthquake corresponding to the P wave detection signal input to the earthquake signal processing apparatus 100 is sufficiently large, a correction signal such as a cancellation report is received after receiving the P wave detection signal. This is because there is a case where it is not necessary to immediately perform the control processing of the shutoff valve after receiving the P-wave detection signal because it is considered to be transmitted. The set expected number of seconds may be determined in consideration of the time required for the shut-off valve to complete closing after the control device 220 transmits a control signal for closing the shut-off valve in response to the P-wave detection signal. good.

  Thus, the set expected number of seconds is a second indicating the threshold value of the number of seconds at which the seismic signal processing device 100 shifts to the closing process of the shutoff valve 214 after the P wave detection signal is detected by the seismometer device 300 or the receiving PC 400. Is a number. For example, when a P wave detection signal is detected by the seismometer apparatus 300 or the receiving PC 400 and is input to the earthquake signal processing apparatus 100, an expected arrival time until an earthquake corresponding to the P wave detection signal arrives, and a storage unit The set expected number of seconds stored in 111 is compared. The seismic signal processing apparatus 100 does not perform the closing process of the shut-off valve 214 when the expected arrival seconds exceeds the set expected seconds. That is, when the expected arrival time of the earthquake according to the P wave detection signal input to the earthquake signal processing device 100 is sufficiently large, the subsequent shut-off valve control processing is prevented from being performed more than necessary. Since the P-wave detection signal is erroneously detected and a correction signal such as a cancellation report may be transmitted, the process is not shifted to the shut-off valve closing process until the estimated number of seconds is exceeded. For example, “7” seconds are set as the expected setting seconds.

  In addition, the storage unit 111 receives a P-wave detection signal for each type of gas filled in the cylinder stored in the cylinder cabinet 200 according to the risk level of the gas, and then receives the shut-off valve 214. The number of grace seconds (delay time) until closing is stored in association with each other. FIG. 4 is a diagram illustrating an example of data stored in the storage unit 111. The data table stored in the storage unit 111 includes, for each gas type, “gas name”, “P wave detection signal for emergency earthquake warning”, “P wave detection signal for seismometer”, “valve opening / closing seconds after detection” Information associated with the items “number” (number of grace seconds) and “latest earthquake cutoff valve forced closing flag” are stored.

  “Gas name” is the name of the gas filled in the cylinder stored in the cylinder cabinet 200. The “P wave detection signal for earthquake early warning” and “P wave detection signal for seismometer” control the shutoff valve by receiving the P wave detection signal from the receiving PC 400 or the seismometer 300 Is condition information indicating For example, in the “P wave detection signal for emergency earthquake warning”, the receiving PC 400 receives an emergency earthquake warning indicating that a P wave has been detected from the weather service support center, and the corresponding cylinder shut-off valve is set. In the case of closing, a mark “◯” is shown. On the other hand, when the shut-off valve of the corresponding cylinder is closed on condition that a P wave detection signal indicating that a P wave has been detected is received from any of the seismometer device 301, the seismometer device 302, and the seismometer device 303 Is marked with “◯” in “P-wave detection signal of seismometer”. In the item “number of seconds for opening / closing the valve after detection”, the expected setting time until the shut-off process of the cylinder filled with the gas indicated by the corresponding “gas name” is performed after receiving the P-wave detection signal The number of grace seconds after the elapse of a number is stored. In the item of “Recent earthquake shut-off valve forced close flag”, a flag indicating whether or not the shut-off valve 214 is forcibly closed even when an earthquake has occurred recently even if the valve opening / closing time is set (0: forced Do not close, 1: Force close) is stored.

For example, in the first line of FIG. 4, the “gas name” is “SiH ₄ ”, the “P wave detection signal of emergency earthquake warning” is “O”, and the “valve opening / closing seconds after detection” is “1”. Is. In this case, it is determined that the predicted seismic intensity calculated based on the P wave detection signal received by the receiving PC 400 is equal to or greater than the set seismic intensity stored in the storage unit 111, and is calculated based on the received P detection signal. When the expected arrival time of shaking is equal to or less than the set expected number of seconds stored in the storage unit 111, the gas “SiH ₄ ” was filled after “1” seconds indicated by the valve opening / closing seconds after detection passed. It represents closing the shut-off valve 214 of the cylinder cabinet 200 in which the cylinder is stored. In addition, when the epicenter is in the immediate vicinity, that is, when the seismometer apparatus 300 detects the P wave before receiving the P wave of the earthquake early warning, regardless of the setting stored in the valve opening / closing seconds after detection. This means that the shutoff valve 214 of the cylinder cabinet 200 in which the cylinder filled with the gas “SiH ₄ ” is immediately stored is closed. For example, in the gas “B ₂ H ₆ ” in the fourth row, “0” is stored as the number of seconds for opening and closing the valve after detection because the degree of danger is high. Indicates that the shut-off valve is immediately closed if it is less than the set expected number of seconds. Further, for example, the gas “N ₂ ” in the eighth line has a low degree of danger, and it is not always necessary to close the supply even when an S wave arrives and a large shaking occurs due to an earthquake. “60” is stored as the number of seconds for opening and closing, and “0” is stored as the item of “latest earthquake cutoff valve forced closing flag”.

  Returning to FIG. 3, the control unit 110 refers to the information stored in the storage unit 111 according to the P-wave detection signal or the S-wave detection signal received by the input terminal block 102, and the cylinder via the output terminal block 103. A control signal is transmitted to the control device 220 of the cabinet 200 to control the shutoff valve. Further, when the control unit 110 receives a P-wave detection signal transmitted from the seismometer device 301, the seismometer device 302, the seismometer device 303, or the receiving PC 400, the set seismic intensity and the set expected second time stored in the storage unit 111. Comparison processing is performed in accordance with the number, the grace time corresponding to the gas filled in the cylinder 201 or the cylinder 202 is read from the storage unit 111, and after waiting for the read grace time, the shutoff valve 214 is closed. A control signal is transmitted to the cylinder cabinet 200.

  When control unit 110 receives an S wave detection signal transmitted from any of seismometer device 301, seismometer device 302, seismometer device 303, or receiving PC 400, control signal for closing shutoff valve 210 and shutoff valve 211 is received. Is transmitted to the cylinder cabinet 200. Further, after receiving a P-wave detection signal from the receiving PC 400 and transmitting a control signal for closing the shut-off valve 214 to the cylinder cabinet 200, when a P-wave cancel signal is received from the receiving PC 400, the shut-off valve 214 closed. A control signal for opening is sent to the cylinder cabinet 200.

  Next, an operation example of the earthquake signal processing apparatus 100 according to the present embodiment will be described with reference to FIG. First, in the case of operating by a detection signal of a P wave or S wave from a seismometer, when any of the seismometer device 301, the seismometer device 302, or the seismometer device 303 detects a P wave (step S2), the P wave detection is performed. The signal is transmitted to the earthquake signal processing apparatus 100. The seismic signal processing apparatus 100 receives the P-wave detection signal transmitted from the seismometer apparatus 300 (step S5). Here, the seismic signal processing apparatus 100 does not proceed to the next step until receiving a detection signal from the seismometer apparatus 300 of a predetermined number or more among the plurality of connected seismometer apparatuses 300. May be. In this case, among the plurality of seismometer devices 300, when the detection signal is received from the number of seismometer devices 300, the setting of the number of units to proceed to the next step is to accept the input of the value from the user, You may enable it to change a setting according to the value input previously. For example, when a detection signal is received from 2 out of 3 (2 out of 3), the process may proceed to the next step.

  Furthermore, when the predetermined condition is satisfied, the earthquake signal processing apparatus 100 may determine whether or not to proceed to the next step (step S6). The predetermined condition is, for example, a condition such as which is prioritized when a P wave detection signal is received from either the receiving PC 400 or the seismometer apparatus 300. When it is determined in step S6 that the predetermined condition is satisfied and the process proceeds to the next step, the earthquake signal processing apparatus 100 has a predicted seismic intensity based on the previously received P wave detection signal equal to or greater than a predetermined set seismic intensity. Is determined (step S8). The set seismic intensity is stored in the storage unit 111 in advance. If the predicted seismic intensity based on the P-wave detection signal is less than the predetermined seismic intensity (step S8: NO), the process proceeds to A and the process is terminated as it is (EXIT).

  On the other hand, when the predicted seismic intensity based on the P-wave detection signal is equal to or greater than the predetermined seismic intensity determined in step S8 (step S8: YES), the seismic signal processing apparatus 100 receives the P-wave of the emergency earthquake warning from the receiving PC 400. Is determined (step S9). When the P wave of the earthquake early warning is received (step S9: YES), the process proceeds to C. On the other hand, when the P wave of the earthquake early warning is not received (step S9: NO), the latest earthquake cutoff valve forced close flag corresponding to each control target gas is read from the data table stored in the storage unit 111 ( Step S10).

  If the read latest earthquake cutoff valve forced closing flag is “1” (step S10: YES), the process proceeds to D, and a control signal for closing the cutoff valve 214 is immediately transmitted to the cylinder cabinet 200. On the other hand, if the read latest earthquake cutoff valve forced close flag is “0” (step S10: NO), the process waits for the number of grace seconds read from the data table stored in the storage unit 111 (step S10). S14). At this time, the control unit 110 of the earthquake signal processing apparatus 100 performs standby processing for each gas to be controlled. For example, when it is determined NO in step S10, the control unit 110 of the earthquake signal processing apparatus 100 starts counting up the number of seconds by using a timer provided in itself. When the counted number of seconds matches the number of grace seconds corresponding to each gas to be controlled, the process proceeds to step S16, and a control signal for closing the shutoff valve 214 is transmitted to the cylinder cabinet 200.

For example, if the gas charged in the cylinder to be controlled is “SiH ₄ ”, the shutoff valve of the cylinder cabinet that houses the SiH ₄ cylinder is closed via the SiH ₄ terminal of the output terminal block 103. Thus, when the control device 220 of the cylinder cabinet 200 receives the control signal transmitted from the earthquake signal processing apparatus 100, the control device 220 closes the shut-off valve 214 and closes the gas flow path from the pipe to the gas supply destination (step S16). ), The process ends (EXIT).

  On the other hand, when receiving PC 400 receives the earthquake early warning transmitted from the meteorological service support center (step S3), receiving PC 400 is based on the received earthquake early warning until the predicted seismic intensity and the earthquake shake arrive. Is calculated (step S4). The control unit 110 of the seismic signal processing apparatus 100 receives a P-wave detection signal from the reception PC 400 connected via the input terminal block 102. Control unit 110 performs the same determination as in step S6 described above, and determines whether or not the predicted seismic intensity of the P-wave detection signal calculated in step S4 is greater than or equal to a predetermined set seismic intensity (step S11).

  If the predicted seismic intensity of the P-wave detection signal is less than the predetermined seismic intensity (step S11: NO), the process proceeds to A and the process is terminated as it is (EXIT). On the other hand, the predicted seismic intensity of the P wave detection signal is equal to or greater than a predetermined seismic intensity (step S11: YES), and the receiving PC 400 does not receive a P wave cancel signal from the meteorological work support center (step S12: NO). ) If the arrival prediction calculated in step S4 is less than the set expected number of seconds stored in the storage unit 111 (step S13: NO), the process proceeds to A and the process is terminated as it is (EXIT). On the other hand, in step S13, when the expected arrival time exceeds the predetermined set number of seconds (step S13: YES), the control unit 110 of the earthquake signal processing apparatus 100 is stored in the storage unit 111. After waiting for processing for the number of grace seconds read from the data table (step S14), a control signal for closing the shutoff valve 214 is transmitted to the cylinder cabinet 200. When receiving the control signal transmitted from the seismic signal processing apparatus 100, the control device 220 of the cylinder cabinet 200 closes the shut-off valve 214, closes the gas flow path from the pipe to the gas supply destination (step S16), and performs processing. End (EXIT).

  If the detection signal received by the receiving PC 400 from the weather service support center in step S3 is a cancel signal, the receiving PC 400 transmits the cancel signal to the seismic signal processing apparatus 100. Then, a control signal for opening the shut-off valve 214 is transmitted to the cylinder cabinet 200 (step S12: YES). When receiving the control signal transmitted from the earthquake signal processing apparatus 100, the control device 220 of the cylinder cabinet 200 opens the shutoff valve 214 and opens the gas flow path from the pipe to the gas supply destination (step S17). After opening the shut-off valve 214, the counted-up timer is reset (step S18), and the process is terminated (EXIT).

  Furthermore, when any of the seismometer device 301, the seismometer device 302, and the seismometer device 303 detects an S wave (step S1), an S wave detection signal is transmitted to the earthquake signal processing device 100. The earthquake signal processing apparatus 100 receives the S wave detection signal transmitted from the earthquake signal processing apparatus 100 (step S5). Here, the seismic signal processing apparatus 100 is in the same manner as in step S5 described above until the detection signals are received from the seismometer apparatuses of a predetermined number or more among the plurality of connected seismometer apparatuses. It is also possible not to proceed to the step.

  The earthquake signal processing apparatus 100 determines whether or not to proceed to the next step according to a predetermined condition such as when an S-wave detection signal is also received from the receiving PC 400 (step S6). If it is determined in step S6 that the predetermined condition is satisfied and the process proceeds to the next step, the seismic signal processing apparatus 100 has a seismic intensity based on the previously received S-wave detection signal equal to or greater than a predetermined set seismic intensity. Whether or not (step S7). If the seismic intensity based on the S wave detection signal is less than the predetermined seismic intensity (step S7: NO), the process proceeds to A, and the process is terminated as it is (EXIT). On the other hand, if the seismic intensity based on the S wave detection signal is equal to or higher than a predetermined set seismic intensity in step S7 (step S7: YES), a control signal for closing the shutoff valve 210 and the shutoff valve 211 is sent to the cylinder cabinet 200. Send. When receiving the control signal transmitted from the earthquake signal processing apparatus 100, the control device 220 of the cylinder cabinet 200 closes the shutoff valve 210 and the shutoff valve 211, and closes the gas flow path from the pipe to the gas supply destination (step S15). ), The process ends (EXIT).

Next, an operation example of the earthquake signal processing apparatus 100 will be described using a time chart. FIG. 6 is a time chart showing an operation example when receiving PC 400 receives a P-wave detection signal detected at a distance. Here, in the following example, it demonstrates without considering the above-mentioned number of grace seconds.
When an earthquake occurs far away from the factory, the receiving PC 400 receives the P-wave detection signal at the point (a). Reception PC 400 calculates the expected number of seconds to reach based on the received P-wave detection signal. Here, assuming that the set expected number of seconds is 7 seconds, the seismic signal processing apparatus 100 does not control the valve shut-off 214 when it exceeds 7 seconds before the expected number of seconds reached. Similarly, at time (b) and time (c), the seismic signal processing apparatus 100 does not control the shut-off valve 214. (D) When the P-wave detection signal is received at the time point and the expected arrival time becomes equal to or less than the set expected number of seconds (7 seconds), the seismic signal processing device 100 controls the control signal to close the shut-off valve 214 at the time point (e). Is transmitted to the cylinder cabinet 200. When receiving the control signal at time (f), the cylinder cabinet 200 closes the shut-off valve 214 and closes the gas flow path. Further, when the seismic signal processing apparatus 100 detects an S wave at the time (g), the seismic signal processing apparatus 100 transmits a control signal for closing the shutoff valve 210 and the shutoff valve 211 to the cylinder cabinet 200. When receiving the control signal at time (h), the cylinder cabinet 200 closes the shutoff valve 210 and the shutoff valve 211 to close the gas flow path, and shuts off the gas supply.

FIG. 7 is a time chart showing an operation example when the seismometer apparatus 300 installed in the factory receives a P-wave detection signal.
(A) When the seismometer apparatus 300 in the factory detects the P wave and transmits the P wave detection signal to the seismic signal processing apparatus 100 at the time point, the seismic signal processing apparatus 100 blocks the control signal for closing the shutoff valve 214. Transmit to valve 214. (B) At the time, the cylinder cabinet 200 receives the control signal and closes the shut-off valve 214. At time (c), the seismometer apparatus 300 detects an S wave and transmits an S wave detection signal to the earthquake signal processing apparatus 100. When the seismic signal processing apparatus 100 receives the S wave detection signal transmitted from the seismometer apparatus 300, the seismic signal processing apparatus 100 transmits a control signal for closing the shutoff valve 210 and the shutoff valve 211 to the cylinder cabinet 200. The cylinder cabinet 200 closes the shut-off valve 210 and the shut-off valve 211, closes the gas flow path, and shuts off the gas supply.

FIG. 8 is a time chart showing an operation example when the receiving PC 400 receives a P-wave detection signal detected at a long distance but later receives a cancellation report.
(A) At the time, the receiving PC 400 receives the P-wave detection signal. Reception PC 400 calculates the expected number of seconds to reach based on the received P-wave detection signal. The seismic signal processing apparatus 100 does not control the shut-off valve 214 until the expected arrival time is equal to or less than the set expected time (for example, 7 seconds). (B) When the reception PC 400 receives the P-wave detection signal at the time point (b), the seismic signal processing apparatus 100 similarly does not control the cutoff valve 214. At time (c), when the receiving PC 400 receives the cancel information, the seismic signal processing apparatus 100 does not control the shutoff valve 214 as it is.

FIG. 9 is a time chart showing an operation example in the case where a detection signal for transmitting the epicenter far is transmitted, but a cancellation report is transmitted later.
(A) At the time, the receiving PC 400 receives a P-wave detection signal indicating that an earthquake has occurred far away. Reception PC 400 calculates the expected number of seconds to reach based on the received P-wave detection signal. The seismic signal processing apparatus 100 does not control the shut-off valve 214 until the expected arrival time is equal to or less than the set expected time (for example, 7 seconds). Similarly, at time (b) and time (c), the seismic signal processing apparatus 100 does not control the shut-off valve 214. (D) When the P-wave detection signal is received at the time point and the expected arrival time becomes equal to or less than the set expected number of seconds (7 seconds), the seismic signal processing device 100 controls the control signal to close the shut-off valve 214 at the time point (e). Is transmitted to the cylinder cabinet 200. When receiving the control signal at time (f), the cylinder cabinet 200 closes the shut-off valve 214 and closes the gas flow path. Thereafter, when the receiving PC 400 receives the cancel information at time (g), the seismic signal processing apparatus 100 transmits a control signal for opening the shut-off valve 214 to open the gas flow path to the cylinder cabinet 200. (H) At the time, the cylinder cabinet 200 receives the control signal, opens the shut-off valve 214, opens the gas flow path, and returns the gas supply.

As described above, according to the present embodiment, when the received P-wave detection signal is a false alarm and a cancel signal is received, it is not necessary to replace the gas in the pipe, and it is possible to quickly return. Can be made possible.
In addition, according to the seismic intensity indicated by the earthquake detection signal received from the receiving PC 400 or the seismometer device 300 when an earthquake occurs, and when a plurality of earthquake detection signals are received, condition settings corresponding to those combinations are stored in advance. Thus, it becomes possible to individually control the optimum shutoff valve.

In addition, air cylinders such as floating rings are attached to the cylinders 201 and 202 stored in the cylinder cabinet 200, and air is sealed by the control signal from the earthquake signal processing apparatus 100 to inflate the cylinder 201 and the cylinder 202. You may make it protect from an impact.
FIG. 10 is a diagram illustrating an example of an air cover attached to the location of the shutoff valve 210 of the cylinder 201. In normal times, it is shrunk as shown in (a), and when an earthquake occurs, air is enclosed and inflated as shown in (b). FIG. 11 is a diagram illustrating an example of an air cover attached to the body portion of the cylinder 201. In normal times, it is shrunk as shown in (a), and when an earthquake occurs, air is enclosed and inflated as shown in (b). FIG. 12 is a view showing an example of an external appearance when the air cover shown in FIGS. 10 and 11 is attached to the cylinder 201.

  The air cover may be attached to a fall prevention chain or band of the cylinder 201. The air cover encloses the cylinder 201 by enclosing air, nitrogen, or the like so that a tube-like shape expands in accordance with the curved surface of the cylinder 201. There are two types of air covers, as shown in Fig. 10 and Fig. 11. One is horizontally extending like a hand according to the curved surface of the cylinder, and the other is attached to the top of the container. Cover and spread around a container valve (accessory). In this way, the cylinder 201 stored in the cylinder cabinet 200 and the peripheral equipment come into contact with each other due to the vibration of the earthquake even when there is a swing more than expected that exceeds the resistance of the fall prevention chain or the band. This can prevent damage to cylinders and peripheral equipment.

  Further, if the air cover is inflated before the arrival of the S wave, the cylinder 201 and the cylinder 202 and the vicinity of the valve are fixed by the air cover, so that the violence of the cylinder 201 and the cylinder 202 due to the shaking of the S wave is suppressed. Therefore, the operation of closing the shutoff valve 210 and the shutoff valve 211 can be performed smoothly. In order to inflate the air cover before the arrival of the S wave, for example, the P wave detection signal of the emergency earthquake warning transmitted from the receiving PC 400 or the P wave detection signal transmitted from the seismometer apparatus 300 is used as the earthquake signal processing apparatus 100. Immediately after receiving the signal, or at the same time as the seismic signal processing apparatus 100 transmits a control signal for closing the shut-off valve 214 to the cylinder cabinet 200 when a predetermined condition is satisfied, a control signal for inflating the air cover is sent to the cylinder cabinet 200. Just send it to. As described above, it is desirable that the air cover starts sealing of air or the like when the P wave is detected. This is because, since it takes time to expand the air cover, if the start of the sealing of air or the like at the same timing as the control for closing the shut-off valve, the expansion may not be in time until the S wave arrives.

  In addition, the program for realizing the function of the processing unit in the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed to process the earthquake signal. May be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

It is a figure which shows the system configuration | structure of the gas supply system by one Embodiment of this invention. It is a figure which shows the external appearance of the earthquake signal processing apparatus by one Embodiment of this invention. It is a figure which shows the terminal structure of the earthquake signal processing apparatus by one Embodiment of this invention. It is a figure which shows the example of data memorize | stored in the memory | storage part of the earthquake signal processing apparatus by one Embodiment of this invention. It is a sequence diagram which shows the operation example of the gas supply system by one Embodiment of this invention. It is a timing chart which shows the operation example of the gas supply system by one Embodiment of this invention. It is a timing chart which shows the operation example of the gas supply system by one Embodiment of this invention. It is a timing chart which shows the operation example of the gas supply system by one Embodiment of this invention. It is a timing chart which shows the operation example of the gas supply system by one Embodiment of this invention. It is an external view which shows the example of the air cover by one Embodiment of this invention. It is an external view which shows the example of the air cover by one Embodiment of this invention. It is an external view which shows the example of the air cover by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas supply system 100 Earthquake signal processing apparatus 101 Indicator lamp 102 Input terminal block 103 Output terminal block 104 Power supply 105 Power supply 106 Maintenance switch 107 Switch for earthquake training 110 Control part 111 Storage part 200 Cylinder cabinet 201 Cylinder 202 Cylinder 210 Shut-off valve 211 Shut-off valve 212 Shut-off valve 213 Shut-off valve 214 Shut-off valve 220 Control device 301 Seismometer device 302 Seismometer device 303 Seismometer device 400 Receiving PC
300 Seismometer

Claims (8)

In a gas supply system in which the gas is supplied from a cylinder filled with gas to a gas supply destination through a pipe, a first cutoff valve for supplying or blocking the gas from the pipe to the gas supply destination; A seismic signal processing device for controlling opening and closing of a second shutoff valve for supplying or shutting off the gas from the pipe,
An input unit to which a P wave detection signal indicating that a P wave due to an earthquake has been detected and an S wave detection signal indicating that an S wave due to an earthquake has been detected;
When the P-wave detection signal is input from the input unit, a first cutoff control unit that closes the first cutoff valve and shuts off the gas supply;
When the S wave detection signal is input from the input unit, a second cutoff control unit that closes the second cutoff valve and shuts off the gas supply;
When the P-wave detection signal is input to the input unit and the first cutoff valve is closed by the first cutoff control unit and the S-wave detection signal is not input to the input unit, the P-wave detection signal is closed. A return control unit for opening the first shut-off valve and returning the gas supply;
An earthquake signal processing apparatus comprising: The seismic signal processing device is connected to the first cutoff valve and the second cutoff valve corresponding to a plurality of the cylinders,
The number of grace seconds until the first shutoff valve corresponding to the gas type is closed after the P-wave detection signal is input is stored in association with the type of gas filled in each of the plurality of cylinders. And a storage unit,
When the first cutoff control unit receives the P-wave detection signal from the input unit, the first cutoff control unit reads the grace seconds corresponding to the type of gas charged in the cylinder from the storage unit, and reads the read-out time. The seismic signal processing apparatus according to claim 1, wherein the first shut-off valve is shut off after a grace time has elapsed. A predetermined set seismic intensity is stored in the storage unit,
The first cutoff control unit compares the predicted seismic intensity of the earthquake based on the input P-wave detection signal with the set seismic intensity stored in the storage unit, and the predicted seismic intensity exceeds the set seismic intensity. 3. The seismic signal processing apparatus according to claim 1, wherein the first shut-off valve is shut off in the case. In the storage unit, a set expected number of seconds indicating a margin time for closing the shutoff valve before the earthquake reaches is stored in advance,
The first cutoff control unit compares the expected number of seconds until an earthquake according to the input P wave detection signal arrives and the set expected number of seconds stored in the storage unit, and The seismic signal processing device according to any one of claims 1 to 3, wherein the first shut-off valve is shut off when an expected arrival time is equal to or less than the set expected seconds. . The seismic signal processing device is connected to a plurality of seismometer devices that detect a P wave or an S wave and input a P wave detection signal or an S wave detection signal to the input unit,
The first cutoff control unit is configured to input the first wave detection signal when the P wave detection signal is input to the input unit from a predetermined number or more of the plurality of seismometer devices. The shut-off valve is closed. The earthquake signal processing device according to any one of claims 1 to 4, wherein: The input unit receives a P-wave detection signal distributed from the Japan Meteorological Agency and a cancel signal indicating that the P-wave detection signal was a false alarm,
The return control unit, when the cancel signal is input to the input unit after the P-wave detection signal is input to the input unit and the first cutoff control unit closes the first cutoff valve The earthquake signal processing apparatus according to any one of claims 1 to 5, wherein the gas supply is restored by opening the closed first shutoff valve. The gas supply system includes an air cover attached to at least one of the cylinder body and the shutoff valve.
The air cover control part which encloses gas in the air cover and inflates when the P wave detection signal is inputted from the input part is provided. Any one of Claims 1-6 characterized by things. The seismic signal processing device described in 1. In a gas supply system in which the gas is supplied from a cylinder filled with gas to a gas supply destination through a pipe, a first cutoff valve for supplying or blocking the gas from the pipe to the gas supply destination; A seismic signal processing device for controlling opening and closing with a second shutoff valve for supplying or shutting off the gas from the pipe,
A step of inputting a P wave detection signal indicating that a P wave due to an earthquake has been detected or an S wave detection signal indicating that an S wave due to an earthquake has been detected to the input unit;
When the first cutoff control unit receives the P-wave detection signal from the input unit, the step of closing the first cutoff valve to shut off the supply of gas;
When the second cutoff control unit receives the S wave detection signal from the input unit, the step of closing the second cutoff valve to shut off the supply of gas;
When the P-wave detection signal is input to the input unit and the S-wave detection signal is not input to the input unit after the first cutoff valve is closed by the first cutoff control unit Opening the closed first shut-off valve to return the gas supply;
An earthquake signal processing method comprising:

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