Pipeline breakage sensing system and sensing method
First Claim
1. A pipeline breakage sensing method for sensing breakage occurring in a pipeline network formed by pipelines installed so as to form a network, said pipeline breakage sensing method comprising the steps of:
- installing, on said pipelines, a leak detector comprising a communication circuit connected to each of a plurality of pressure sensors for supplying pressure wave data sensed by any of the plurality of pressure sensors to a predetermined pressure sensor, said plurality of pressure sensors detecting pressure of a fluid flowing through each pipeline wherein each pressure sensor includes a microprocessor for calculating statistical presumption of any possible breakage;
in response to detection of a pressure change of at least a predetermined value in said fluid by one of said pressure sensors, inputting information relating to a pressure change of another predetermined pressure sensor to the microprocessor of said one of said pressure sensors for the purpose of performing a correlating and comparing step on the pressure change outputs of the two predetermined pressure sensors; and
sensing a breakage location of the pipelines by using the inputted information and detected information.
1 Assignment
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Accused Products
Abstract
A pipeline breakage sensing system includes a plurality of pressure sensors installed on pipelines to measure pressure of a fluid. Each of these pressure sensors presumes a breakage location in cooperation with other neighboring sensors on the basis of a pressure change of the fluid and transmits information relating to the presumed breakage location. The pipeline breakage sensing system further includes a pressure sensor for detecting the occurrence of a seismic earthquake event, in addition to a managing center for sensing a breakage location on the basis of information transmitted from respective pressure sensors and by calculating a time correlated comparison between the superimposed pressure readings from neighboring pressure sensors used to detect the occurrence of such a fluid pressure change. Thereby, breakage of a pipeline network is sensed and the quantity of flow delivered through an affected pipeline is adjusted, stopped or regulated by control of one or more valves in accordance with a predetermined, weighted system of fluid flow requirements, customer ordered priorities and customer demand levels.
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Citations
23 Claims
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1. A pipeline breakage sensing method for sensing breakage occurring in a pipeline network formed by pipelines installed so as to form a network, said pipeline breakage sensing method comprising the steps of:
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installing, on said pipelines, a leak detector comprising a communication circuit connected to each of a plurality of pressure sensors for supplying pressure wave data sensed by any of the plurality of pressure sensors to a predetermined pressure sensor, said plurality of pressure sensors detecting pressure of a fluid flowing through each pipeline wherein each pressure sensor includes a microprocessor for calculating statistical presumption of any possible breakage; in response to detection of a pressure change of at least a predetermined value in said fluid by one of said pressure sensors, inputting information relating to a pressure change of another predetermined pressure sensor to the microprocessor of said one of said pressure sensors for the purpose of performing a correlating and comparing step on the pressure change outputs of the two predetermined pressure sensors; and sensing a breakage location of the pipelines by using the inputted information and detected information. - View Dependent Claims (2, 3, 4, 5, 6, 18, 19)
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7. A pipeline breakage sensing method for sensing breakage occurring in a pipeline network formed by pipelines installed so as to form a network, said pipeline breakage sensing method comprising the steps of:
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installing, on said pipelines, a leak detector comprising a communication circuit connected to each of a plurality of pressure sensors for supplying pressure wave data sensed by any of the plurality of pressure sensors to a predetermined pressure sensor, said plurality of pressure sensors detecting pressure of a fluid flowing through each pipeline wherein each pressure sensor includes a microprocessor for calculating statistical presumption of any possible breakage; in response to detection of a pressure change of at least a predetermined value in said fluid by one of said pressure sensors, inputting information relating to a pressure change of another predetermined pressure sensor to the microprocessor of said one of said pressure sensors for the purpose of performing a correlating and comparing step on the pressure change outputs of the two predetermined pressure sensors; sensing a breakage location of the pipelines by using the inputted information and detected information; and wherein a dedicated seismometer type of pressure sensor which has felt at least a predetermined seismic intensity is also connected into the plurality of said pressure sensors used to sense a breakage location of a pipeline.
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8. A pipeline breakage sensing system having a plurality of pressure sensors installed on pipelines forming a network, pressure of a fluid flowing in said pipelines being measured by said plurality of pressure sensors, said pipeline breakage sensing system comprising:
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each of said pressure sensors having a microprocessor that calculates an output signal presuming a breakage location in cooperation with time correlated output signals of other neighboring sensors on the basis of a pressure change of said fluid and transmitting information relating to the presumed breakage location; and a managing center for sensing a breakage location on the basis of information transmitted from respective pressure sensors. - View Dependent Claims (9, 10, 13, 14, 15, 16)
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11. A pipeline breakage sensing system having a plurality of pressure sensors installed on pipelines forming a network, pressure of a fluid flowing in said pipelines being measured by said plurality of pressure sensors, said pipeline breakage sensing system comprising:
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each of said pressure sensors having a microprocessor that calculates an output signal presuming a breakage location in cooperation with timed correlated output signals of other neighboring sensors on the basis of a pressure change of said fluid and transmitting information relating to the presumed breakage location; a managing center for sensing a breakage location on the basis of information transmitted from respective pressure sensors; each of said pressure sensors comprising; a buffer for temporarily holding time series data of measured pressure; a wave memory, responsive to a change of at least a predetermined value in the pressure of said fluid, for storing, out of time series data stored in said buffer, time series data measured before the change of pressure and time series data measured after the change of pressure; a processor, responsive to storage into said wave memory, for presuming a breakage location of said pipeline and a leak quantity caused by the breakage on the basis of the time series data stored in said wave memory and time series data stored in wave memories of sensors neighboring said pressure sensor; and wherein each of said pressure sensors comprises a seismometer, responsive to feeling of at least a predetermined seismic intensity, for starting storage of said time series data into said wave memory.
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12. A pipeline breakage sensing system having a plurality of pressure sensors installed on pipelines forming a network, pressure of a fluid flowing in said pipelines being measured by said plurality of pressure sensors, said pipeline breakage sensing system comprising:
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each of said pressure sensors having a microprocessor that calculates an output signal presuming a breakage location in cooperation with timed correlated output signals of other neighboring sensors on the basis of a pressure change of said fluid and transmitting information relating to the presumed breakage location; a managing center for sensing a breakage location on the basis of information transmitted from respective pressure sensors; each of said pressure sensors comprising; a buffer for temporarily holding time series data of measured pressure; a wave memory, responsive to a change of at least a predetermined value in the pressure of said fluid, for storing, out of time series data stored in said buffer, time series data measured before the change of pressure and time series data measured after the change of pressure; a processor, responsive to storage into said wave memory, for presuming a breakage location of said pipelines and a leak quantity caused by the breakage or the basis of the time series data stored in said wave memory and time series data stored in wave memories of sensors neighboring said pressure sensor; and wherein said managing center comprises; a seismometer for sensing occurrence of an earthquake and generating a data holding output signal; and a leak information accumulator, responsive to a signal supplied from said seismometer, for accumulating pressure data stored in said wave memory.
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17. A pipeline breakage sensing system for sensing breakage of a pipeline in a gas conveying pipeline network, comprising:
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a plurality of acoustic wave emission sensors installed in pipelines of said pipeline network to sense supersonic waves generated within said conveyed gas upon occurrence of a leak of gas at a break in said pipeline; and upon sensing said supersonic waves, each of said acoustic wave emission sensors presuming a breakage location in cooperation with the time correlated output results obtained by one or more other neighboring acoustic wave emission sensors among said plurality of acoustic waves emission sensors.
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20. A pipeline breakage sensing system having a plurality of pressure sensors installed on pipelines forming a network, pressure of a fluid flowing in said pipelines being measured by said plurality of pressure sensors, said pipeline breakage sensing system comprising:
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each of said pressure sensors having a microprocessor that calculates an output signal presuming a breakage location in cooperation with time correlated output signals of other neighboring sensors in a case where a plurality of said pipelines are extended from said one of pressure sensors, on the basis of a pressure change of said fluid and transmitting information relating to the presumed breakage location, only said one of said pressure sensors deriving coincident presumption results from communication with all neighboring sensors; and a managing center for sensing a breakage location on the basis of information transmitted from respective pressure sensors of said plurality of pressure sensors. - View Dependent Claims (21, 22)
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23. A pipeline breakage sensing system for sensing breakage of a pipeline in a gas conveying pipeline network, comprising:
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a plurality of acoustic wave emission sensors installed in pipelines of said pipeline network to sense supersonic waves generated upon a leak of gas; and upon sensing said supersonic waves, each of said acoustic wave emission sensors presuming a breakage location in cooperation with the time correlated output results obtained by one or more other neighboring acoustic wave emission sensors among said plurality of acoustic wave emission sensors where a plurality of pipelines are extended from said each of said acoustic wave emission sensors, only said each of said acoustic wave emission sensors deriving coincident presumption results from communication with all neighboring acoustic wave emission sensors.
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Specification