JP3784564B2 - Earthquake remote monitoring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an earthquake remote monitoring device that monitors the state of an on-off valve such as a governor that is closed when an earthquake occurs, and further relates to a disaster remote monitoring device for other disasters.
[0002]
[Prior art]
Conventionally, pipelines that transport city gas and other fluids have been equipped with multiple governors with open / close functions, and each governor has been provided with a slave station that has a seismic device. When is detected, safety is achieved by shutting off the governor corresponding to the seismoscope that detected the earthquake. In order to collect information from the slave station indicating that each governor is closed at the master station, when the governor is closed, an automatic call is made via the telephone line, and the information is transmitted from the slave station to the master station. It has been proposed.
[0003]
In such a configuration, when a large number of governors are closed at the time of an earthquake, a signal representing the state in which each governor is closed is automatically called from the slave station and transmitted to the master station. Therefore, in order to prevent the telephone line of the master station from being busy, the master station requires a large number of telephone lines. This is particularly true not only for earthquake information but also for the occurrence of alarms such as power outages, primary pressure drops, secondary pressure drops and gas leaks related to each governor. When the station is automatically called and the alarm information is transmitted to the master station, in the event of an earthquake, not only the governor is closed, but also each of the above-mentioned alarm states occurs. Automatic calls are made. Therefore, in the event of an earthquake, there will be a flood of earthquake information and alarm information transmission to the master station, and in order to prevent the master station's telephone line from being busy, it will be necessary to provide more telephone lines in the master station. .
[0004]
Another problem in the proposed configuration described above is whether the slave station is damaged due to a disaster or is healthy when the slave station provided for each governor does not transmit information to the master station. It cannot be known at the master station.
[0005]
[Problems to be solved by the invention]
The object of the present invention is to allow the master station to collect information representing the open / close states of the open / close valves such as governors from a large number of slave stations in a short time without increasing the number of communication channels such as telephone lines. Another object of the present invention is to provide a seismic remote monitoring device that makes it possible to easily know whether a slave station is damaged by a disaster or is healthy.
[0006]
Another object of the present invention is to collect information in a short time without requiring a large number of communication paths from a slave station to a master station in the event of a disaster such as an earthquake and other storms and floods. It is another object of the present invention to provide a disaster remote monitoring apparatus that can make it possible to easily know whether a slave station is damaged or healthy.
[0007]
[Means for Solving the Problems]
In the present invention, a plurality of on-off valves are interposed in a plurality of mutually connected pipelines for each of a plurality of blocks,
Each block has a seismometer,
A slave station is provided for each on-off valve,
The slave station
A seismic instrument,
A first level discriminating means for discriminating the level SI of the earthquake detected by the seismic sensor with a predetermined first value SI1;
In response to the output of the first level discriminating means, when the detected magnitude of the earthquake is equal to or greater than the first value SI1, closing drive means for closing the on-off valve;
An open / close state signal indicating an open / close state of the open / close valve, and a slave station control means for transmitting when a transmission request signal is received;
A master station connected to each seismometer and the slave station control means is provided.
A second level discriminating means for discriminating the level of the earthquake detected by the seismometer with a second value SI2 which is less than the first value SI1 in response to the output of each seismometer;
An open / close state signal for each slave station is received, responds to the output of the second level discriminating means, and when the detected earthquake level is equal to or greater than the second value SI2, the detected seismometer is provided. An earthquake remote monitoring device comprising: a master station control means for sequentially polling each slave station belonging to a block and transmitting a transmission request signal.
[0008]
According to the present invention, the pipeline network is divided into a plurality of blocks, and a plurality of on-off valves, for example, governors having a shut-off function are interposed in the plurality of pipelines in each block. Is provided. A seismometer is provided for each block. The seismic degree SI detected by the seismometer is discriminated by the second value SI2 by the second level discriminating means provided in the master station. The degree of earthquake SI may represent, for example, the degree of damage caused by an earthquake in a pipeline buried in the ground using a numerical value in units of cain.
[0009]
When the magnitude SI of the earthquake detected by the seismometer is equal to or greater than the second value SI2 (SI2 ≦ SI), the seismometer that detects the magnitude of the earthquake equal to or greater than the second value SI2 belongs to the block Each slave station is sequentially polled by the master station control means, and a transmission request signal is transmitted to each slave station.
[0010]
The slave station control means provided in the slave station receives a transmission request signal transmitted by polling of the master station control means, transmits an open / close state signal indicating the open / close state of the open / close valve, and transmits to the master station control means. give. As a result, the master station can know the open / close state of the on / off valves in all the slave stations in the block in which the earthquake of the second value SI2 or more is detected by the seismometer. A plurality of slave stations sequentially send open / closed status signals by the polling operation by the control means for the master station, so that the number of communication paths such as a telephone line can be reduced and the possibility of becoming busy on the telephone line is eliminated. It is possible to easily know the open / closed states of the plurality of on-off valves in a short time in the master station.
[0011]
The slave station control means may be configured to transmit only the open / close state signal and not transmit other alarm information in response to the transmission request signal. By doing so, it is possible to shorten the time for the master station control means to communicate with each slave station control means, and it is therefore possible to collect a plurality of open / closed state signals in a short time.
[0012]
Furthermore, since the open / close state signal from the slave station control means is received by polling the master station control means, when the open / close state signal is received, it can be known that the slave station is healthy, When the open / close state signal cannot be received, it is possible to know that the slave station may be damaged due to a disaster or the like. Further, the master station receives such an open / close state signal, and transmits a close drive command signal to the slave station so that the open / close valve indicating that the open / close state signal is open is closed by the close drive means. You may control.
[0013]
Further, according to the present invention, the slave station is provided with a seismic device, and the magnitude SI of the earthquake detected by the seismic device is determined by the first level discrimination means provided in the slave station. When this is the case (SI ≧ SI1), the closing drive means drives the on-off valve to close. The first value SI1 described above may be, for example, 60 kanes, and the second value SI2 may be less than the first value SI1 and may be, for example, 30 kanes (SI2 <SI1).
[0014]
The slave station control means closes the on-off valve to ensure safety when the first level discriminating means discriminates that the degree of earthquake detected by the seismic sensor is equal to or greater than the first value SI1. In one embodiment of the present invention, the slave station control means transmits an open / close state signal to the master station at this time. Therefore, even if the magnitude of the earthquake detected by the seismometer is less than the second value SI2, the control means for the master station has the magnitude of the earthquake detected by the seismometer being equal to or greater than the first value SI1. Then, an open / close state signal of the on / off valve of only the slave station provided with the seismic device that detects the degree of the earthquake of the first value SI1 or more is transmitted to the master station control means. At this time, the seismic device may have derived an output, for example, due to a collision of a ball or a collision of a spear that is being cleaned, or a local earthquake may occur in one block.
[0015]
As described above, the master station is equipped with a seismometer that performs a polling operation when the degree of earthquake detected by the seismometer is equal to or greater than the second value SI2, and detects the magnitude of the earthquake greater than or equal to the second value SI2. The open / close valve open / close state signal is received from all the slave stations belonging to the block, and the open / close state of the open / close valve can be known from the master station. When the degree of earthquake detected by the seismometer is equal to or greater than the first value SI1, the open / close state of the open / close valve can be known by receiving the open / close state signal from the slave station in the block by polling. .
[0016]
In the present invention, the control means for the master station
When the magnitude of the earthquake detected by each seismometer is equal to or greater than the second value SI2, ordering is performed in order from the block with the largest magnitude of the detected earthquake to the smallest block,
The on / off state of the on-off valve is output in the order of the ordered blocks.
[0017]
According to the present invention, if the degree of earthquake detected by the seismometer for each block over a plurality of blocks is greater than or equal to the second value SI2, the control unit for the master station starts from the block having the greater magnitude of earthquake. The blocks are ordered in the order of the smaller blocks, and the open / close state of the on-off valves belonging to each block is output in the order of the ordered blocks, for example, visually displayed by visual display means, or printed on recording paper by a printer. In addition, sound display is performed by a configuration including a speech synthesis circuit and a speaker. As a result, it is possible to easily check the open / close state of the on-off valve in the order of the blocks that are estimated to be damaged by the earthquake.
[0018]
In the present invention, the slave station control means is individually connected to the telephone line,
The master station control means is connected to one or more receiving telephone lines that receive the output of the seismometer,
On the master station side,
A phone,
A switching means for selectively switching a plurality of telephone lines between the control means for the master station and the telephone;
When the detected magnitude of the earthquake is equal to or greater than the second value SI2, the switching means switches at least a part of the telephone line connected to the telephone to the master station control means and connects it. .
[0019]
According to the present invention, the slave station control means is individually connected to a telephone line, for example, a single general telephone line, and is opened and closed in response to a transmission request signal by the polling operation of the master station control means. Can be transmitted from the slave station control means.
[0020]
The master station control means is connected to one or a plurality of reception telephone lines, for example, a disaster priority telephone line, and can receive an output from a seismometer provided for each group.
[0021]
To detect the open / close state of the on / off valves of the slave stations in the group to which the seismometer that has detected that the degree of earthquake is greater than or equal to the second value SI2 by polling operation on the master station side in a shorter time Therefore, at least a part of the plurality of telephone lines connected to the telephone by the switching means is switched to and connected to the master station control means by the switching means when the above-mentioned earthquake occurs except when the earthquake occurs. Therefore, the master station control means can perform a plurality of polling operations in parallel using the telephone lines switched from these telephones. Therefore, it is possible to collect open / close state signals from many slave stations in a shorter time. One or a plurality of general telephone lines for polling operation may be always connected to the master station control means.
[0022]
In the present invention, the master station
In response to the output of each seismometer, there is further provided a third level discriminating means for discriminating the level of the earthquake detected by the seismometer with a predetermined third value SI3 exceeding the second value SI2.
The master station control means is responsive to the output of the third level discriminating means, and identifies a block whose degree of detected earthquake is greater than or equal to the third value SI3.
[0023]
According to the present invention, when the degree SI of the earthquake detected by the seismometer is equal to or higher than the third value SI3, when the level is discriminated by the third level discriminating means, the earthquake having the third value SI3 or higher is detected. The block to which the seismometer is detected is identified and displayed visually or acoustically, or recorded on a recording sheet by a printer. The third value SI3 is a predetermined value that exceeds the second value SI2 (SI2 <SI3), and may be equal to the first value SI1, for example. Therefore, when the magnitude SI of the earthquake detected by the seismometer for each block is equal to or greater than the third value SI3, for example, equal to or greater than 60 kines, the open / close for each on-off valve in the block obtained by the polling operation It is easy to know whether all the open / close valves are closed by the status signal. If there is an open / close valve that is open in one block, the operator knows that an operation to close the open / close valve should be performed. In this way, if the degree of earthquake detected by the seismometer is greater than or equal to the third value SI3 for each block, all the on-off valves in that block can be promptly shut off. Therefore, if the open / close valve remains open, the operator performs an operation of closing the open / close valve to ensure safety.
[0024]
In the present invention, the slave station has detection means for detecting data relating to the fluid transported to the pipeline,
The slave station control means periodically receives the output of the detection means every predetermined time, and when at least one of the outputs changes, transmits a state change signal of the seismoscope and the detection means. To the control means for the master station,
The master station control means receives and outputs the state change signal.
[0025]
According to the present invention, the slave station is provided with detection means, and this detection means detects data relating to a fluid such as city gas transported by a pipeline, and has a power failure and opening / closing function of the slave station, for example. Data that is alarm information such as a primary pressure drop of the governor, which is a pressure control valve, a secondary pressure drop of the governor, and a gas leak is detected. The slave station control means transmits a state change signal to the master station control means when the seismic device detects an earthquake and when the detection means detects the aforementioned data, and the master station control signal The state change signal is received and output by a display means or a printer. In this way, not only the earthquake but also the alarm state, which is data detected by other detection means, can be known at all times by the master station control means.
[0026]
When the seismic device and the detecting means transmit the state change signal, the slave station control means receives the outputs of the seismic device and the detecting means periodically at a predetermined time, for example, every short time by a microcomputer, The current output of the seismoscope and detection means is compared with the previous output, and when at least one of these outputs changes, a state change signal is derived. In this way, the slave station control means transmits a state change signal only when an alarm condition occurs, such as when an earthquake is detected by the seismic sensor and when the above-mentioned data is detected by the detection means. Therefore, the transmission is prevented from being repeated a plurality of times, and the occupation state of the communication path such as a telephone line is made as short as possible to improve the transmission efficiency.
[0027]
Further, the present invention is provided with first detection means for detecting the degree SI of the occurrence of disaster for each of a plurality of blocks,
A plurality of slave stations are provided in each block, and each slave station is
A second detection means for detecting the degree of occurrence of the disaster;
First level discriminating means for discriminating the level of disaster detected by the second detecting means with a predetermined first value SI1;
Means for responding to the output of the first level discriminating means and performing an operation for safety when the degree of disaster detected is not less than the first value SI1;
A state signal indicating a state in which the operation for safety is performed, and a control unit for a slave station that transmits when a transmission request signal is received;
A master station connected to the first detection means and the slave station control means is provided.
Second level discriminating means for responding to the output of each first detecting means and discriminating the level of disaster detected by the first detecting means by a second value SI2 which is less than the first value SI1;
When the status signal for each slave station is received and in response to the output of the second level discriminating means, and the degree of disaster detected is greater than or equal to the second value SI2, the detected first detecting means is provided. The remote monitoring device for disaster is characterized by having a master station control means for sequentially polling each slave station belonging to a certain block and transmitting a transmission request signal.
[0028]
According to the present invention, in the event of a disaster such as a typhoon caused by a typhoon, the degree of occurrence of a disaster that is a physical or chemical value SI such as a water level due to wind and rain or increased river water is determined for each block in a plurality of areas. Detected by the detecting means, the slave station is provided with the second detecting means, and the degree of occurrence of the disaster is detected similarly to the first detecting means, and the degree of occurrence of the disaster detected by the second detecting means is determined. If the first level discriminating means is equal to or greater than the first value SI1, a safety operation is performed, for example, an open / close valve in a river is opened. The status signal indicating the state in which the operation is performed is transmitted from the slave station control means to the master station control means by receiving a transmission request signal from the polling operation of the master station control means.
[0029]
The master station control means is provided with the first detection means when the degree of disaster detected by each first detection means is equal to or greater than the first value SI1 which is less than the second value SI2. A slave station belonging to a certain block is sequentially polled, and a status signal indicating that a safety operation is being performed is received from each slave station. In this way, it is possible to check at the master station whether or not the operation for safety of the slave station for each block is performed. This ensures safety in the event of a disaster.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram of a seismic remote monitoring apparatus 1 according to an embodiment of the present invention. A seismometer Q and a slave station A are provided for each of the plurality of blocks B. The seismometer Q and the slave station A are connected to the telephone line network 2 via the public telephone line L. The telephone line network 2 is connected to the master station 3 via a receiving telephone line La and a general telephone line Lb1. When the earthquake occurs, information from the seismometer Q and each slave station A is collected in the master station 3. Reference symbol Q generally indicates individual reference symbols Q1, Q2,..., And reference symbol A generally indicates slave stations A11, A12,... A1i; Reference symbols B1, B2,... Are generally indicated by reference symbol B. Further, reference symbols L1, L2,..., L11, L12,. In another embodiment of the present invention, the seismometer Q may be connected to the master station 3 via a private radio network according to its importance and reliability.
[0031]
FIG. 2 is a diagram showing each block B in a simplified manner. In each block B, a plurality of governors 5 having a blocking function are interposed in a plurality of pipelines 4 connected to each other. The governor 5 keeps the secondary pressure constant at a predetermined value and supplies it to a consumer place such as each house or factory. The governor 5 can supply and shut off gas, and also serves as an on-off valve. Such a governor 5 may be configured by integrally combining a pressure control valve and an on-off valve, or may be configured separately and combined. In each block B, a seismometer Q is arranged to detect the degree of earthquake for each block B. The slave station A is provided for each governor 5.
[0032]
Referring to FIG. 1 again, the slave station A is provided with a processing circuit 7 realized by a microcomputer or the like. The processing circuit 7 is provided with an output representing the degree of earthquake from the seismic device 8. Further, a shutoff detection means 9 such as a micro switch for detecting that the governor 5 is shut off, a power failure detection means 10 indicating that the commercial AC power supply has failed, and a primary pressure of the governor 5 that is determined in advance. Primary pressure drop detecting means 11 for detecting that the pressure is less than the second pressure value, secondary pressure drop detecting means 12 for detecting that the secondary pressure of the governor 5 is less than a predetermined second pressure value, and the governor 5. Gas leakage detection means 13 for detecting gas leakage from the vicinity is provided. The outputs of these detection means 9 to 13 are given to the processing circuit 7 as alarm information. When a power failure occurs, the processing circuit 7 is driven by a battery or the like. The processing circuit 7 controls the cutoff operation of the governor 5. Further, the processing circuit 7 is provided with a memory 14, in which outputs of the seismic device 8 and the detection means 9 to 13 are stored, and signals from the master station 3 are stored. The processing circuit 7 is connected to the telephone line L11. Seismometer Q1 is connected to seismometer L1. The other blocks B2,... Have the same configuration as the block B1.
[0033]
The master station 3 is provided with a processing circuit 16 realized by a microcomputer or the like. The processing circuit 16 may be connected to a visual display means 17 such as a liquid crystal or a cathode ray tube and a printer 18 for printing on a recording paper, and may further include an acoustic display means including a voice synthesis circuit and a speaker. The processing circuit 16 is connected to the reception telephone line La. The processing circuit 16 is also connected to a plurality of general telephone lines Lb1 via one or a plurality of telephone lines Lb2 and switching means 19. Further, the telephone line Lb3 is connected to a plurality of extension telephones 21.
[0034]
In a state where no earthquake has occurred, the number of telephone lines Lb2 connected to the processing circuit 16 is, for example, zero or a relatively small number set in advance. At this time, many telephone lines Lb3 are connected to the extension telephone 21. Thus, the general telephone line Lb1 is used.
[0035]
When an earthquake occurs, the number of transmission telephone lines Lb2 connected to the processing circuit 16 by the switching means 19 is increased. The number of telephone lines Lb3 connected to the telephone 21 is reduced. In this way, the switching operation of the general telephone line Lb1 by the switching means 19 is performed.
[0036]
FIG. 3 shows a transmission telephone line Lb2 and a general telephone line from the processing circuit 16 of the master station 3 in order to collect information from the plurality of slave stations A by a polling operation by the processing circuit 16 of the master station 3 when an earthquake occurs. It is a figure which shows the structure of the signal 22 transmitted to the sub_station | mobile_unit A via Lb1. The signal 22 transmitted from the processing circuit 16 of the master station 3 includes a slave station addressing signal 23 for addressing the slave station A and the earthquake detected by the seismoscope 8 from the slave station A that is addressed. And a transmission request signal 24 for requesting that a signal indicating the degree should be transmitted to the master station 3.
[0037]
When the slave station address designation signal 23 of the signal 22 transmitted from the processor circuit 16 of the master station 3 coincides with a predetermined slave station address for identifying the slave station A, the processor circuit 7 of the slave station A Along with the slave station address transmission signal, the outputs of the seismoscope 8 and the detection means 9 to 13 are transmitted as monitoring data to the master station 3 via the telephone line L11.
[0038]
FIG. 4 is a diagram showing a configuration of a signal 25 that the processing circuit 7 of the slave station A transmits to the master station 3 in response to the transmission request signal 24. The slave station address designation signal 26 is a slave station address that identifies the slave station A that transmits the signal 25. Subsequent to the slave station address designation signal 26, monitoring data 27 is transmitted. Although the monitoring data 27 may include the output of the seismic device 8 and each of the detection means 9 to 13 as described above, in the other embodiment of the present invention, only the output of the seismic device 8 is used. The time for collecting information from each of the plurality of slave stations A by the station 3 may be shortened.
[0039]
FIG. 5 is a flowchart for explaining the operation when the transmission request signal 24 of the processing circuit 7 of the slave station A is received. Moving from step a1 to step a2, when the processing circuit 7 receives the transmission request signal 24 by the polling operation by the processing circuit 16 of the master station 3, in the next step a3, the seismoscope 8 stored in the memory 14 and The outputs of the detection means 9 to 13 are read out, and the address designation signal 26 of the own station is further added as the monitoring data 27 to form the signal 25 shown in FIG. The data is transmitted to the line L11 and given to the master station 3.
[0040]
FIG. 6 is a flowchart for explaining still another operation of the processing circuit 7 of the slave station A. When an earthquake occurs or when an earthquake does not occur, the process proceeds from step b1 to step b2, and the outputs of the seismic device 8 and the detection means 9 to 13 are sequentially transferred to the memory 14 at a predetermined relatively short period. To store. In step b3, it is determined whether the data stored in the memory 14 this time and the data stored last time are different for each data. When the current data and the previous data are different, the signal 25 shown in FIG. 4 is transmitted from the slave station A to the master station 3.
[0041]
In the transmission operation 28 of FIG. 6, the slave station A transmits the signal 25 from the telephone line L. At this time, if the telephone line Lb2 connected to the master station 3 is not busy, the signal 25 is transmitted to the processing circuit 16 of the master station 3 in step b5. The signal 25 may include only data in which the current data differs from the previous data, but includes all the monitoring data 27, that is, the outputs of the seismic device 8 and the detection means 9-13. May be.
[0042]
When the signal 25 is transmitted from the slave station A in step b4, if the telephone line Lb2 of the master station 3 is busy, the process proceeds to the next step b6, waits for a predetermined time, for example, 3 minutes, and then retransmits. The redialing operation is again performed by the processing circuit 7 and the number N of redialing operations is counted. In step b7, it is determined whether the counted number N of redials exceeds a predetermined number N0 (N> N0). If not, the process proceeds to step b4. When the number of redials N exceeds the predetermined number N0, the process returns to step b2. Thus, when the outputs of the seismic sensor 8 and the detection means 9 to 13 are different from the previous output, the signal 25 is transmitted from the slave station A to the master station 3, and an automatic redial operation is performed.
[0043]
FIG. 7 is a simplified circuit diagram showing a connection configuration between the master station 3 and the telephone line network 2. In the office 29, the master station 3 is arranged. A processing circuit 16 of the master station 3 is connected to the head office 31 via an extension telephone network 32. In the office 29, the reception telephone line La is directly connected to the processing circuit 16 of the master station 3. In another embodiment of the present invention, a private wireless network may be used instead of the reception telephone line La. The switching means 19a of the office 29 is connected to the telephone line network 2 via the telephone line Lb11. The telephone line Lb11 is, for example, a disaster priority telephone line 40 and a general telephone line 112 line. The processing circuit 16 of the master station 3 is connected to 37 of the 40 priority telephone lines for disaster only when any seismometer Q detects the degree of earthquake of the second value SI2 or more. Furthermore, 20 lines out of the 112 general telephone lines are switched and connected, and the 37 telephone lines and the 20 general telephone lines are indicated by a reference symbol Lb21. A telephone line Lb31 is connected to the extension telephone 21. This telephone line Lb31 is the remaining telephone line that is not connected to the processing circuit 16. Assuming that the reference number of each telephone line also represents the number of lines, Lb11 = Lb21 + Lb31. When an earthquake does not occur, the telephone line Lb21 is used for the extension telephone 21a.
[0044]
The switching means 19b in the head office 31 is connected to the telephone line network 2 as indicated by the reference symbol Lb12, the disaster priority telephone line 26 and the general telephone line 50. At the time of the earthquake, 20 of the 26 priority telephone lines are connected to the processing circuit 16 via the extension telephone network 32 as indicated by reference numeral Lb22. Thus, the telephone line Lb2 in FIG. 1 is configured by the telephone lines Lb21 and Lb22 when an earthquake occurs. The extension telephone 21b in the head office 31 is connected by the remaining telephone line Lb32 (Lb12 = Lb32 + Lb22). When an earthquake does not occur, the switching means 19b enables the telephone line Lb12 to be connected to the extension telephone 21b. The extension telephone network 32 can perform bucket communication. The switching means 19 a and 19 b are indicated by reference numeral 19 in FIG. 1, and this switching means 19 is controlled by the processing circuit 16.
[0045]
FIG. 8 is a flowchart for explaining the operation of the processing circuit 16 of the master station 3. From step c1 to step c2, the occurrence of an earthquake with a seismometer of 2 to 5 or more, for example, from the seismometer Q provided for each block B and / or the seismic device 8 for each slave station A occurred. In the next step c 3, the outputs of all the seismometers Q are collected in the processing circuit 16 and stored in the memory 33. In step c4, it is determined whether or not the degree of earthquake SI detected by the plurality of seismometers Q is a predetermined second value SI2, for example, 30 or more.
[0046]
SI ≧ SI2 (1)
In step c4, when the above-described equation 1 is established, the earthquake mode operations in steps c5 to c12 are performed. In this earthquake mode, the output of the seismometer Q is collected again in step c5, as in step c3 described above. In step c6, when the earthquake degree SI detected by each seismometer Q satisfies the above-described equation 1, that is, the second value SI2 or more, the detected earthquake degree SI is changed from a larger block to a smaller block. In order, order.
[0047]
In step c7, in order from the slave station A belonging to the block having a large earthquake level, the polling operation signal 22 shown in FIG. 3 is transmitted in order to request the slave station A to transmit. Transmit to the master station 3. Thus, the open / closed state signal indicating the open / closed state of the governor 5 from the block provided with the seismometer Q that detects the degree of earthquake that is equal to or greater than the second value SI2 is collected in order from the block having the largest earthquake degree SI to the smallest block. To do. In this way, it is determined whether or not the collection of the monitoring data of the block B in which the magnitude SI of the earthquake detected by the seismometer Q is equal to or greater than the second value SI2 is determined. If the collection of the monitoring data 27 of the block B is not completed, the collecting operation of the monitoring data 27 from the slave station A by the signal 28 is performed in the next step c8.
[0048]
FIG. 9 is a diagram showing monitoring data 27 for each block ordered by the processing circuit 16. The information collection result shown in FIG. 9 is stored in the memory 33, displayed by the display means 17, and can be printed by the printer 18. This operation is performed in step c12 of FIG. In the embodiment of FIG. 9, the blocks are ordered in the order of B4, B2, B1, and B3, for example, from the block with the highest level of earthquake to the block with the smallest magnitude. An open / close state signal indicating the on / off state is collected in the processing circuit 16.
[0049]
When it is determined that the collection of all the monitoring data 27 of the block in which the seismometer Q that has detected the degree of earthquake that is equal to or greater than the second value SI2 is completed, the process ends in step c10. Thus, in step c11, a series of operations is completed.
[0050]
The present invention is not only implemented in connection with seismic remote monitoring devices that transport fluids such as city gas, but can also be implemented extensively for remote monitoring of other types of disasters. In another embodiment of the present invention, a first detection means corresponding to the seismometer Q is provided for each of a plurality of blocks when a disaster other than an earthquake occurs. The first detection means detects the degree of occurrence of a disaster having a physical or chemical value SI such as a water level in a typhoon damage caused by a typhoon. A plurality of slave stations are provided in each block, and the second detection means of this slave station detects the degree of disaster occurrence, for example, the water level, and the detected water level is predetermined by the first level discrimination means. When the value is equal to or greater than the first value SI1, an operation for safety, for example, an operation such as opening or closing an on-off valve in a river is performed to prevent the occurrence of a flood. In the master station, when the second level discriminating means level discriminates that the degree of disaster from the first detecting means is the second value SI2 which is less than the first value SI1, the detected first level is detected. The master station control means sequentially polls each slave station belonging to the block in which the detection means is provided, transmits a transmission request signal, and the detection data from the slave station by the second detection means and other detection means Collect data. Other configurations and operations are the same as those of the above-described embodiment.
[0051]
【The invention's effect】
According to the present invention of claim 1, when the magnitude SI of the earthquake detected by the seismometer provided for each block is equal to or greater than the second value SI2, the magnitude of the earthquake equal to or greater than the second value SI2. Each slave station in the block in which the seismometer is detected transmits a transmission request signal by a polling operation, and each slave station transmits an open / close state signal of the on-off valve from the slave station control means, thereby The master station can know the open / close state of the on / off valve. Since the master station control means collects information based on the open / close state signal by the above-described polling operation, it does not require a large communication path such as a telephone line and can collect the open / close state signal in a short time. it can. Furthermore, even if the transmission request signal is transmitted by the polling operation, when the open / close state signal is not received by the control means for the master station, it is possible to know that the slave station may be damaged due to the disaster, and thus the slave station. You can tell if it is damaged or healthy.
[0052]
In the slave station, when the magnitude SI of the earthquake detected by the seismoscope provided corresponding to each on-off valve is equal to or greater than the first value SI1 exceeding the second value SI2, the closing drive means The on-off valve is automatically closed. Therefore, when the magnitude of the earthquake detected by the seismometer is equal to or greater than the first value SI1, the magnitude of the earthquake equal to or greater than the second value SI2 is detected based on the open / closed state signal collected by the master station control means. For example, it is possible to easily check whether all the on-off valves in the seismometer block are closed and to perform a safety work.
[0053]
According to the present invention of claim 2, the seismometer provided for each block is ordered in the order from the block with the largest earthquake to the block with the smaller magnitude, and the open / close state of the on-off valve for each block is visually checked. Alternatively, it can be output by acoustic display means or by a printer. Accordingly, it is possible to check the open / close state of the on-off valve in order from the block having the greatest degree of disaster due to the earthquake, and it is possible to easily and reliably take safety measures.
[0054]
According to the third aspect of the present invention, the master station control means is connected to a reception telephone line so that the output of the seismometer can be received at all times. When the second level discrimination means determines that the degree of earthquake detected by the seismometer is equal to or greater than the second value SI2, the switching means is connected to the telephone for polling the slave station. At least a part of the plurality of telephone lines is switched to and connected to the master station control means. Therefore, the polling operation can further shorten the information collection time of the open / close state signal from the slave station control means. Furthermore, the telephone line is not always connected to the control unit for the master station because of the polling operation at the occurrence of an earthquake that is not frequently used, and can be used for the telephone, and the communication efficiency is good.
[0055]
According to the fourth aspect of the present invention, the master station control means discriminates a block whose degree of earthquake detected by the seismometer is equal to or greater than the third value SI3 by the output of the third level discrimination means. As a result, it is possible to easily check the open / close state of the on-off valve in the block where the degree of disaster due to the earthquake is large on the master station side. Further, by setting the third value SI3 to the same value as the second value SI2 or a value exceeding the second value SI2, it is possible for the operator to close the open on-off valve in the block. Therefore, it becomes possible to quickly perform the operation.
[0056]
According to the present invention of claim 5, the slave station includes not only the above-mentioned seismic device but also data relating to the fluid transported by the pipeline, such as power failure, primary pressure drop, secondary pressure drop and gas leakage And detecting a change in the output of the periodic detection means to generate a state change signal from the slave station control means. In this way, the master station can receive and know changes in the status of the slave station, and can remotely monitor the slave station even when an earthquake does not occur. The state change signal from the control means can be received using, for example, a reception telephone line.
[0057]
According to the present invention of claim 6, when the disaster occurrence degree SI is not less than the second value SI2 by the first detection means provided for each of the plurality of blocks, each slave station is controlled by the master station control means. Performs a polling operation sequentially, receives a status signal indicating a state in which a safety operation is being performed, and the master station side can easily know the safety operation. In the slave station, the safety operation is automatically performed when the degree of occurrence of the disaster exceeding the second value SI2 is detected by the second detection means and the safety operation is automatically performed. Is done.
[Brief description of the drawings]
FIG. 1 is a block diagram of a seismic remote monitoring apparatus 1 according to an embodiment of the present invention.
FIG. 2 is a diagram showing each block B in a simplified manner.
FIG. 3 shows that when a earthquake occurs, in order to collect information from a plurality of slave stations A by a polling operation by the processing circuit 16 of the master station 3, the slave station A passes from the processing circuit 16 via the telephone line Lb2 and the general telephone line Lb1. It is a figure which shows the structure of the signal 22 transmitted to.
4 is a diagram showing a configuration of a signal 25 that is transmitted from the processing circuit 7 of the slave station A to the master station 3 in response to the transmission request signal 24. FIG.
FIG. 5 is a flowchart for explaining the operation when the transmission request signal 24 of the processing circuit 7 of the slave station A is received.
6 is a flowchart for explaining still another operation by the processing circuit 7 of the slave station A. FIG.
7 is a simplified circuit diagram showing a connection configuration between a master station 3 and a telephone line network 2. FIG.
FIG. 8 is a flowchart for explaining the operation of the processing circuit 16 of the master station 3;
FIG. 9 is a diagram showing monitoring data 27 for each block ordered by the processing circuit 16;
[Explanation of symbols]
1 Remote monitoring device for earthquake
2 Telephone network
3 master station
4 pipelines
5 Governor
7 Processing circuit
8 Seismic instruments
9 Blocking detection means
10 Power failure detection means 1
11 Primary pressure drop detection means
12 Secondary pressure drop detection means
13 Gas leak detection means
14 memory
16 Processing circuit
19 Switching means
A child station
B block
Q Seismometer

Claims (6)

For each of a plurality of blocks, a plurality of on-off valves are interposed in a plurality of mutually connected pipelines,
Each block has a seismometer,
A slave station is provided for each on-off valve,
The slave station
A seismic instrument,
A first level discriminating means for discriminating the level SI of the earthquake detected by the seismic sensor with a predetermined first value SI1;
In response to the output of the first level discriminating means, when the detected magnitude of the earthquake is equal to or greater than the first value SI1, closing drive means for closing the on-off valve;
An open / close state signal indicating an open / close state of the open / close valve, and a slave station control means for transmitting when a transmission request signal is received;
A master station connected to each seismometer and the slave station control means is provided.
A second level discriminating means for discriminating the level of the earthquake detected by the seismometer with a second value SI2 which is less than the first value SI1 in response to the output of each seismometer;
An open / close state signal for each slave station is received, and in response to the output of the second level discriminating means, the detected seismometer is provided when the degree of detected earthquake is greater than or equal to the second value SI2. An earthquake remote monitoring apparatus comprising: a master station control means for sequentially polling each slave station belonging to a block and transmitting a transmission request signal. The control means for the master station is
When the magnitude of the earthquake detected by each seismometer is equal to or greater than the second value SI2, ordering is performed in order from the block with the largest magnitude of the detected earthquake to the smallest block,
2. The earthquake remote monitoring device according to claim 1, wherein the open / close state of the on-off valve is output in the order of the ordered blocks. The slave station control means is individually connected to the telephone line,
The master station control means is connected to one or more receiving telephone lines that receive the output of the seismometer,
On the master station side,
A phone,
A switching means for selectively switching a plurality of telephone lines between the control means for the master station and the telephone;
When the detected magnitude of the earthquake is equal to or greater than the second value SI2, the switching means switches at least a part of the telephone line connected to the telephone to the master station control means and connects it. The remote monitoring apparatus for earthquakes according to claim 1 or 2. The master station
In response to the output of each seismometer, there is further provided a third level discriminating means for discriminating the level of the earthquake detected by the seismometer with a predetermined third value SI3 exceeding the second value SI2.
The control means for master station is responsive to the output of the third level discriminating means, and identifies the block whose degree of detected earthquake is greater than or equal to the third value SI3. The remote monitoring device for earthquakes according to one of the above. The slave station has detection means for detecting data relating to the fluid transported to the pipeline,
The slave station control means periodically receives the output of the detection means at predetermined time intervals,
When at least one of the outputs changes, a state change signal of the seismoscope and the detection means is transmitted and given to the control means for the master station,
5. The earthquake remote monitoring apparatus according to claim 1, wherein the master station control means receives and outputs a state change signal. First detection means for detecting the degree SI of the occurrence of disaster is provided for each of the plurality of blocks,
A plurality of slave stations are provided in each block, and each slave station is
A second detection means for detecting the degree of occurrence of the disaster;
First level discriminating means for discriminating the level of disaster detected by the second detecting means with a predetermined first value SI1;
Means for responding to the output of the first level discriminating means and performing an operation for safety when the degree of disaster detected is not less than the first value SI1;
A state signal indicating a state in which the operation for safety is performed, and a control unit for a slave station that transmits when a transmission request signal is received;
A master station connected to the first detection means and the slave station control means is provided.
Second level discriminating means for responding to the output of each first detecting means and discriminating the level of disaster detected by the first detecting means by a second value SI2 which is less than the first value SI1;
When the status signal for each slave station is received and in response to the output of the second level discriminating means, and the degree of disaster detected is greater than or equal to the second value SI2, the detected first detecting means is provided. A remote monitoring device for disaster, comprising: master station control means for sequentially polling each slave station belonging to a certain block and transmitting a transmission request signal.

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