WO2017188074A1 - 漏洩箇所分析システム、漏洩箇所分析方法、漏洩箇所分析装置及びコンピュータ読み取り可能な記録媒体 - Google Patents
漏洩箇所分析システム、漏洩箇所分析方法、漏洩箇所分析装置及びコンピュータ読み取り可能な記録媒体 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
- G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
Definitions
- the present invention relates to a leak location analysis system, a leak location analysis method, a leak location analysis apparatus, and a computer-readable recording medium.
- An auditory sensory test in which a person listens to a leaked sound is generally performed as a test for detecting fluid leakage.
- the leak detection based on hearing is strongly dependent on the skill of the skilled person.
- Patent Document 1 a vibrator is installed in a conduit buried in the ground to apply vibration, and the vibration is detected by a vibration sensor installed at a distance on the conduit.
- a method of measuring the vibration propagation speed of the fluid and specifying the position where the fluid leaks is described.
- Patent Document 2 the received signals of two ultrasonic sensors provided across an abnormal location existing in a conduit are discriminated for each frequency, and the abnormal location is considered in consideration of the speed dispersion dependency of the leaked sound propagation speed.
- An abnormal point detection device is described that makes it possible to specify the position of the above with high accuracy.
- the conventional inspection method and inspection device for leaking points by a machine do not have sufficient accuracy for specifying the leaking point when the material or diameter of the pipe changes in the measurement section by two sensors.
- the pipe material and diameter may change in the middle of a measurement section by two sensors due to replacement work of a pipe deteriorated due to corrosion or the like due to aging.
- Patent Documents 1 and 2 when multiple types of tubes are mixed, the propagation speed of individual tube vibrations and leaked sound cannot be calculated. There is a problem of lowering.
- the present invention provides a leak location analysis system, a leak location analysis method, and a leak location analysis device capable of accurately analyzing a fluid leak location even when a plurality of types of piping are mixed and the material and diameter of the piping change.
- the purpose is to provide.
- a leak location analysis system includes: First wave detection means installed in the first pipe; A second wave detecting means installed in the second pipe connected to the first pipe; In the first pipe, with reference to the installation location of the first wave detection means, a vibration means for applying a wave to the non-connection side with the second pipe, The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means; A length from an installation location of the first wave detection means to a connection location with the second pipe and a length from an installation location of the second pipe detection means to a connection location with the first pipe; And a leak location calculating means for calculating the leak location of the fluid.
- a leak location analysis method includes: In the first pipe, on the basis of the installation location of the first wave detection means, a wave is applied to the non-connection side with the second pipe connected to the first pipe, The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means installed in the second pipe; A length from an installation location of the first wave detection means to a connection location with the second pipe and a length from an installation location of the second wave detection means to a connection location with the first pipe; Based on the above, a fluid leakage point is calculated.
- the leak location analyzer is First wave detection means installed in the first pipe; A second wave detecting means installed in the second pipe connected to the first pipe; The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means; A length from an installation location of the first wave detection means to a connection location with the second pipe and a length from an installation location of the second pipe detection means to a connection location with the first pipe; And a leak location calculating means for calculating the leak location of the fluid.
- a computer-readable recording medium is provided.
- a wave is applied to the non-connection side with the second pipe connected to the first pipe, The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means installed in the second pipe; A length from an installation location of the first wave detection means to a connection location with the second pipe and a length from an installation location of the second wave detection means to a connection location with the first pipe; Based on the above, a program for causing a computer to execute a leak location analysis method for calculating a leak location of a fluid is recorded.
- a leak location analysis system capable of accurately analyzing a leak location of a fluid even when a plurality of types of piping are mixed and the material and diameter of the piping change.
- a leak location analysis apparatus capable of accurately analyzing a leak location of a fluid even when a plurality of types of piping are mixed and the material and diameter of the piping change.
- FIG. 1 is a schematic diagram illustrating an installation example of the leak location analysis system according to the first embodiment.
- FIG. 2 is a schematic block diagram illustrating an example of the configuration of the leak location analysis system according to the first embodiment.
- FIG. 3 is a graph illustrating the frequency dependence of the wave propagation velocity of piping.
- FIG. 4 is a graph illustrating an example of data processing in the wave propagation velocity calculating unit according to the first embodiment.
- FIG. 5 is a graph illustrating an example of data processing in the leak location calculation unit according to the first embodiment.
- FIG. 6 is a graph showing an example of a cross-correlation function calculated from wave data detected by the first wave detection unit and the second wave detection unit in the first embodiment.
- FIG. 7 is a graph illustrating an example of data processing in the wave propagation velocity calculation unit according to the second embodiment.
- FIG. 8 is a graph illustrating an example of data processing in the wave propagation velocity calculation unit according to the third embodiment.
- FIG. 9 is a schematic block diagram illustrating an example of the configuration of the leakage spot analyzing apparatus according to the fifth embodiment.
- FIG. 10 is a schematic block diagram illustrating an example of the configuration of the leakage spot analyzing apparatus according to the sixth embodiment.
- FIG. 11 is a flowchart illustrating an example of the operation of the leak location analysis system according to the first embodiment.
- FIG. 12 is a diagram illustrating an example of a configuration of an information processing apparatus that executes a program for a leakage location calculation method according to the fourth embodiment.
- the leakage spot analysis system taking as an example the case where the pipe is a water pipe embedded in soil. explain.
- the present invention is not limited to the following description.
- the present invention can be widely used for water pipes not buried in soil, pipes through which fluids such as oil and gas flow, and the like, in addition to water pipes buried in soil.
- FIGS. 1-10 the same code
- the structure of each part may be simplified as appropriate, and the dimensional ratio of each part may be schematically shown, unlike the actual case.
- the leak location analysis system 100 of the present embodiment includes a first wave detection unit 101 a, a second wave detection unit 101 b, an excitation unit 102, and a first wave data collection unit. 103a, second wave data collection means 103b, wave propagation velocity calculation means 104, leak location calculation means 105, and piping information input means 107.
- the first wave data collection means 103a, the second wave data collection means 103b, the wave propagation velocity calculation means 104, and the piping information input means 107 are arbitrary components. It is preferable to have it, but it is not necessary to have it.
- the first wave detection unit 101a and the second wave detection unit 101b may be any type as long as they can detect the wave of the pipe.
- a sensor that detects vibration, a sensor that detects pressure fluctuation, and the like. can give.
- the first wave detection means 101a is installed in the first pipe 120a.
- the first wave detection means 101a may be installed directly on the first pipe 120a, or may be installed on the first pipe 120a via the valve plug portion 123a as illustrated in FIG.
- Examples of the valve plug portion 123a include a fire hydrant, a water stop cock, and an air valve connected to the first pipe 120a.
- the second wave detection means 101b is installed in the second pipe 120b connected to the first pipe 120a.
- the 2nd wave detection means 101b may be directly installed in the 2nd piping 120b, and may be installed in the 2nd piping 120b via the valve plug part 123b so that it may illustrate in FIG. Examples of the valve plug portion 123b include a fire hydrant, a water stop cock, and an air valve connected to the second pipe 120b.
- the vibration means 102 is means for applying a wave in the first pipe 120a on the non-connection side with the second pipe 120b with the installation location of the first wave detection means 101a as a reference.
- the vibration means 102 may be anything as long as it can apply a wave to the pipe, and examples thereof include striking with a speaker and a hammer.
- the vibration means 102 may be provided in any place as long as it can apply a wave to a place other than the range indicated by the arrow La of the first pipe 120a.
- the vibration means 102 is provided in the valve plug portion 123a, and applies a wave to a portion other than the range indicated by the arrow La of the first pipe 120a via the valve plug portion 123a. May be.
- the leak location analysis method using the leak location analysis system 100 in the installation example shown in FIG. 1 is performed as follows. First, the wave applied by the vibration means 102 is detected by the first wave detection means 101a and the second wave detection means 101b, and is then detected by the first wave data collection means 103a and the second wave data collection means 103b. Collected and sent to the wave propagation velocity calculation means 104. As described above, in the leak location analysis system 100, the first wave data collection unit 103a and the second wave data collection unit 103b are arbitrary constituent members, and the first wave detection unit 101a and the second wave data collection unit 103b.
- the wave data detected by the wave detection means 101b may be sent directly to the wave propagation velocity calculation means 104 without passing through the first wave data collection means 103a and the second wave data collection means 103b.
- the wave propagation velocity calculation unit 104 is an arbitrary component, and the wave data detected by the first wave detection unit 101a and the second wave detection unit 101b is As illustrated in FIG. 9, the information may be sent directly to the leak point calculation means 105.
- tp (f) is the difference in arrival time at the frequency f
- La is the length from the installation location of the first wave detection means 101a to the connection location with the second pipe 120b (see FIG. 1).
- Lb is the length from the installation location of the second wave detection means 101b to the connection location with the first pipe 120a (see FIG. 1)
- Ca is the wave propagation velocity of the first pipe 120a
- Cb is This is the wave propagation velocity of the second pipe 120b.
- La and Lb are input from the ledger or the like to the wave propagation velocity calculation unit 104 by the pipe information input unit 107.
- the pipe information input unit 107 is an arbitrary constituent member, and La and Lb may be held in advance by the wave propagation velocity calculation unit 104.
- the wave propagation velocity calculation means 104 calculates the unknowns Ca and Cb.
- the graph of FIG. 3 illustrates the frequency dependence of the wave propagation speed of cast iron pipes and plastic pipes.
- Ca shows the frequency dependence of the wave propagation speed of a cast iron pipe
- Cb shows the frequency dependence of the wave propagation speed of a plastic pipe.
- equations (2) and (3) A0, A1, B0 and B1 are unknowns to be determined individually. Substituting equations (2) and (3) into equation (1) results in four equations with unknowns. As illustrated in FIG. 4, the wave propagation velocity calculation unit 104 determines these unknowns by calculating a plurality of (four in this example) frequency components tp.
- the calculation method of tp is not particularly limited, and examples thereof include a method using a digital filter and a method using fast Fourier transform.
- the determination method of the four unknowns is not particularly limited, and examples thereof include a solution method for general simultaneous nonlinear equations including a least square method.
- an initial value of a water hammer propagation velocity formula well known in hydraulics is used based on information such as pipe material, diameter, and laying position information inputted from the pipe information input means 107. As a result, it is possible to estimate the wave propagation velocity more stably.
- the leak location calculation means 105 calculates the leak location using the wave propagation velocity configured using the determined unknown.
- the occurrence of leakage may be determined by a conventionally known method such as a method of determining based on a threshold value set in the frequency spectrum of the wave.
- the wave data detected by the first wave detecting means 101a and the second wave detecting means 101b in a state where the wave by the vibration means 102 is not applied is used.
- the mutual calculation calculated from the wave data detected by the first wave detection unit 101a and the second wave detection unit 101b illustrated in FIG. Tp is calculated from the peak of the correlation function, and the leak location P is calculated using equation (4).
- illustration of the valve stopper part 123a and the valve stopper part 123b is abbreviate
- the waves applied by the excitation means 102 detected by the first wave detection means 101a and the second wave detection means 101b are converted into the first wave data collection means 103a and the second wave data collection means. Collected at 103b (step S101).
- the collected data is sent to the wave propagation velocity calculation means 104.
- the wave propagation velocity is calculated by the wave propagation velocity calculating unit 104 or the leaked portion calculating unit 105 using the wave data detected in step S101 (step S102).
- the leak location is calculated by the leak location calculation means 105 using the wave propagation velocity calculated in step S102 (step S103).
- the frequency dependence of the wave propagation speed is approximated by a linear function related to frequency.
- the accuracy can be further improved.
- the leak location analysis system according to the present embodiment is the same as the leak location analysis system according to the first embodiment.
- the wave propagation velocity calculation unit 104 uses the first pipe 101a at a plurality of frequencies.
- the wave propagation velocity of the second pipe 101b and the wave propagation velocity of the second pipe 101b are similar to the leak location analysis method of the first embodiment, except that each is approximated by a quadratic function.
- the frequency dependence graph of the wave propagation speed is generally a curve, and thus approximation by a quadratic function increases approximation accuracy over a wide range, resulting in a result. As a result, the calculation accuracy of the leaked portion increases.
- equations (5) and (6) are used.
- a plurality (six in this example) of frequency components tp are used as illustrated in FIG. It is also possible to determine the unknown from seven or more frequency components. In this case, the estimation accuracy of the unknown increases.
- the leak location analysis system according to the present embodiment is the same as the leak location analysis system according to the first embodiment.
- the wave propagation velocity calculation unit 104 uses the first pipe 101a at a plurality of frequencies.
- the wave propagation velocity of the second pipe 101b and the wave propagation velocity of the second pipe 101b are approximated by functions different from those of the first embodiment, respectively.
- the approximate function may be a third or higher order as illustrated in FIG.
- the approximate function for example, an exponential function, a logarithmic function, or the like can be used as appropriate as long as the unknown number can be determined.
- the program according to the present embodiment is a program capable of executing the above-described leakage location calculation method with a computer.
- the program of this embodiment is, for example, a processor such as a CPU (Central Processing Unit), a network processor (NP), or a microprocessor; a microcontroller (microcontroller); a semiconductor integrated circuit (LSI: Large Scale Integration). It may be driven by a circuit such as;
- the program of this embodiment may be recorded on the recording medium, for example.
- the recording medium is not particularly limited, and examples thereof include a random access memory (RAM), a read only memory (ROM), a hard disk (HD), an optical disk, a floppy (registered trademark) disk (FD), and the like.
- FIG. 12 shows an example of an information processing apparatus that executes the program of this embodiment.
- the information processing apparatus 500 includes the following configuration as an example.
- CPU 501 ROM 502 RAM 503 A program 504 loaded into the RAM 503 A storage device 505 for storing the program 504 A drive device 507 for reading / writing the recording medium 506 Communication interface 508 connected to the communication network 509 An input / output interface 510 for inputting / outputting data -Bus 511 connecting each component
- Each component of each device in each embodiment is realized by the CPU 501 acquiring and executing a program 504 that realizes these functions.
- the program 504 that realizes the function of each component of each device is stored in advance in the storage device 505 or the RAM 503, for example, and is read by the CPU 501 as necessary.
- the program 504 may be supplied to the CPU 501 via the communication network 509 or may be stored in the recording medium 506 in advance, and the drive device 507 may read the program and supply it to the CPU 501.
- each device may be realized by an arbitrary combination of the information processing device 500 and a program that are separately provided for each component.
- a plurality of constituent elements included in each device may be realized by an arbitrary combination of one information processing device 500 and a program.
- each device is realized by a general-purpose or dedicated circuit board including a processor or the like, or a combination thereof. These may be constituted by a single chip cage or may be constituted by a plurality of chip cages connected via a bus. Part or all of each component of each device may be realized by a combination of the above-described circuit and the like and a program.
- each device When some or all of the constituent elements of each device are realized by a plurality of information processing devices and circuits, the plurality of information processing devices and circuits may be centrally arranged or distributedly arranged. Also good.
- the information processing apparatus, the circuit, and the like may be realized as a form in which each is connected via a communication network, such as a client and server system and a cloud computing system.
- FIG. 9 shows an example of the configuration of the leak location analyzer of this embodiment.
- the leak location analyzing apparatus 200 of the present embodiment includes a first wave detection means 101a, a second wave detection means 101b, and a leak location calculation means 105.
- the first wave detection unit 101a and the second wave detection unit 101b may be any type as long as they can detect the wave of the pipe.
- a sensor that detects vibration, a sensor that detects pressure fluctuation, and the like. can give.
- the first wave detection means 101a is installed in the first pipe.
- the first wave detection means 101a may be installed directly on the first pipe, or may be installed on the first pipe via a valve plug.
- Examples of the valve plug portion include a fire hydrant, a stop cock, an air valve, etc. connected to the first pipe.
- the second wave detection means 101b is installed in a second pipe connected to the first pipe.
- the second wave detection means 101b may be installed directly on the second pipe, or may be installed on the second pipe via a valve plug.
- the valve plug portion include a fire hydrant, a stop cock, and an air valve connected to the second pipe.
- Leakage location calculating means 105 determines the difference between the wave arrival time to the first wave detection means 101a and the wave arrival time to the first wave detection means 101b, and the first location from the installation location of the first wave detection means 101a. Based on the length to the connection location with the second piping and the length from the installation location of the second piping detection means 101b to the connection location with the first piping, the fluid leakage location is calculated.
- FIG. 10 shows an example of the configuration of the leak location analyzer of the present embodiment.
- the leak location analyzer 200 of this embodiment is the same as the leak location analyzer of Embodiment 5 except that it further includes a wave propagation velocity calculation means 104.
- the wave propagation velocity calculation unit 104 determines the difference between the wave arrival time to the first wave detection unit 101a and the wave arrival time to the first wave detection unit 101b, and the installation location of the first wave detection unit 101a. Based on the length to the connection location with the second pipe and the length from the installation location of the second wave detection means 101b to the connection location with the first piping, the first frequency at a plurality of frequencies. The wave propagation velocity of the pipe and the wave propagation velocity of the second pipe are calculated.
- the leak location calculating means 105 uses the wave propagation speed of the first pipe and the wave propagation speed of the second pipe at the plurality of frequencies, Calculate the leak location.
- the first wave detection means is a detection means installed in the first pipe
- the second wave detection means is a detection means installed in a second pipe connected to the first pipe
- the vibration means is means for applying a wave to the non-connecting side with the second pipe with respect to an installation location of the first wave detection means in the first pipe
- the leak location calculation means The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means; A length from an installation location of the first wave detection means to a connection location with the second pipe and a length from an installation location of the second pipe detection means to a connection location with the first pipe; Based on the above, the leak location analysis system is a means for calculating the leak location of the fluid.
- (Appendix 2) further, The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means; A length from an installation location of the first wave detection means to a connection location with the second pipe and a length from an installation location of the second pipe detection means to a connection location with the first pipe; A wave propagation velocity calculating means for calculating the wave propagation velocity of the first pipe and the wave propagation velocity of the second pipe at a plurality of frequencies, The leakage point calculation means calculates the leakage point of the fluid using the wave propagation speed of the first pipe and the wave propagation speed of the second pipe at the plurality of frequencies.
- the wave propagation velocity calculation means approximates the wave propagation velocity of the first pipe and the wave propagation velocity of the second pipe at the plurality of frequencies by a linear function, respectively. Leak location analysis system.
- the wave propagation velocity calculation means approximates the wave propagation velocity of the first pipe and the wave propagation velocity of the second pipe at the plurality of frequencies by a quadratic function, respectively.
- the wave propagation velocity calculation means includes a length from an installation location of the first wave detection means to a connection location with the second pipe and an installation location of the second wave detection means from the first location. 6.
- the leak location analysis system according to any one of appendices 2 to 5, further comprising a plumbing information input means for inputting information on a length to a connection location with the piping.
- the pipe information input means can input at least one information selected from the group consisting of material, diameter and laying position information of the first pipe and the second pipe to the wave propagation velocity calculation means.
- the leak location analysis system according to supplementary note 6, characterized in that.
- Appendix 12 The leak location according to any one of appendices 9 to 11, wherein at least one piece of information selected from the group consisting of material, diameter, and laying position information of the first pipe and the second pipe is used. Analysis method.
- the first wave detection means is a detection means installed in the first pipe
- the second wave detection means is a detection means installed in a second pipe connected to the first pipe
- the leak location calculation means The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means; A length from an installation location of the first wave detection means to a connection location with the second pipe and a length from an installation location of the second pipe detection means to a connection location with the first pipe;
- the leak location analyzer is a means for calculating the leak location of the fluid.
- wave propagation velocity calculation means is included,
- the wave propagation velocity calculating means is The difference between the wave arrival time to the first wave detection means and the wave arrival time to the second wave detection means; A length from an installation location of the first wave detection means to a connection location with the second piping and a length from the second piping installation location to a connection location with the first piping; Is a means for calculating the wave propagation velocity of the first pipe and the wave propagation velocity of the second pipe at a plurality of frequencies,
- the leak location calculating means is a means for calculating a leak location of the fluid using the wave propagation speed of the first pipe and the wave propagation speed of the second pipe at the plurality of frequencies.
- the leak location analyzer according to appendix 15.
- a leak location analysis system capable of accurately analyzing a leak location of a fluid even when a plurality of types of piping are mixed and the material and diameter of the piping change.
- the leak location analysis system, leak location analysis method, and leak location analysis apparatus of the present invention can be widely used for analyzing leak locations of various pipes including pipes constituting a pipe network for transporting water, oil, gas, etc. It is.
- Leakage location analysis system 101a First wave detection means 101b Second wave detection means 102 Excitation means 103a First wave data collection means 103b Second wave data collection means 104 Wave propagation velocity calculation means 105 Leakage location calculation means 107 Pipe information input means 120a First pipe 120b Second pipe 123a, 123b Valve plug part 200 Leakage location analyzer
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Abstract
Description
第1の配管に設置される第1の波動検知手段と、
前記第1の配管に接続された第2の配管に、設置される第2の波動検知手段と、
前記第1の配管において、前記第1の波動検知手段の設置箇所を基準として、前記第2の配管との非接続側に波動を加える加振手段と、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所算出手段とを含むことを特徴とする。
第1の配管において、第1の波動検知手段の設置箇所を基準として、前記第1の配管に接続された第2の配管との非接続側に波動を加え、
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出することを特徴とする。
第1の配管に設置される第1の波動検知手段と、
前記第1の配管に接続された第2の配管に、設置される第2の波動検知手段と、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所算出手段とを含むことを特徴とする。
第1の配管において、第1の波動検知手段の設置箇所を基準として、前記第1の配管に接続された第2の配管との非接続側に波動を加え、
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所分析方法をコンピュータに実行させるプログラムを記録していることを特徴とする。
図1の模式図に、本実施形態の漏洩箇所分析システムの設置例を示す。また、図2の模式ブロック図に、本実施形態の漏洩箇所分析システムの構成の一例を示す。図2に例示するように、本実施形態の漏洩箇所分析システム100は、第1の波動検知手段101aと、第2の波動検知手段101bと、加振手段102と、第1の波動データ収集手段103aと、第2の波動データ収集手段103bと、波動伝搬速度算出手段104と、漏洩箇所算出手段105と、配管情報入力手段107と、を含む。本実施形態の漏洩箇所分析システム100において、第1の波動データ収集手段103a、第2の波動データ収集手段103b、波動伝搬速度算出手段104及び配管情報入力手段107は、任意の構成部材であり、有することが好ましいが、有さなくてもよい。
例えば、図5に例示するように、点Pにおいて漏洩が発生した場合には、図6に例示する第1の波動検知手段101a及び第2の波動検知手段101bで検知した波動データで計算した相互相関関数のピークからtpを算出し、式(4)を用いて漏洩箇所Pを算出する。なお、図5では、弁栓部123a及び弁栓部123bの図示を省略している。
本実施形態の漏洩箇所分析システムは、実施形態1の漏洩箇所分析システムと同じであり、本実施形態の漏洩箇所分析方法は、波動伝搬速度算出手段104が、複数の周波数における第1の配管101aの波動伝搬速度及び第2の配管101bの波動伝搬速度を、それぞれ、二次関数で近似する点を除き、実施形態1の漏洩箇所分析方法と同様である。本実施形態によれば、図3に例示するように、一般に波動伝播速度の周波数依存性のグラフは、曲線となるため、二次関数で近似することで、広い範囲において近似精度が高まり、結果として、漏洩箇所の算出精度が高まる。二次関数で近似するにあたっては、式(5)及び(6)を用いる。
本実施形態の漏洩箇所分析システムは、実施形態1の漏洩箇所分析システムと同じであり、本実施形態の漏洩箇所分析方法は、波動伝搬速度算出手段104が、複数の周波数における第1の配管101aの波動伝搬速度及び第2の配管101bの波動伝搬速度を、それぞれ、実施形態1とは異なる関数で近似する点を除き、実施形態1の漏洩箇所分析方法と同様である。
本実施形態のプログラムは、前述の漏洩箇所算出方法を、コンピュータで実行可能なプログラムである。本実施形態のプログラムは、例えば、CPU(Central Processing Unit)、ネットワークプロセッサ(NP:Network Processor)、マイクロプロセッサ(microprocessor)等のプロセッサ;マイクロコントローラ(microcontroller);半導体集積回路(LSI:Large Scale Integration)等の回路;等により駆動処理されてもよい。本実施形態のプログラムは、例えば、記録媒体に記録されていてもよい。記録媒体としては、特に限定されず、例えば、ランダムアクセスメモリ(RAM)、読み出し専用メモリ(ROM)、ハードディスク(HD)、光ディスク、フロッピー(登録商標)ディスク(FD)等があげられる。
・ROM502
・RAM503
・RAM503にロードされるプログラム504
・プログラム504を格納する記憶装置505
・記録媒体506の読み書きを行うドライブ装置507
・通信ネットワーク509と接続する通信インターフェース508
・データの入出力を行う入出力インターフェース510
・各構成要素を接続するバス511
各実施形態における各装置の各構成要素は、これらの機能を実現するプログラム504をCPU501が取得して実行することで実現される。各装置の各構成要素の機能を実現するプログラム504は、例えば、予め記憶装置505やRAM503に格納されており、必要に応じてCPU501が読み出す。なお、プログラム504は、通信ネットワーク509を介してCPU501に供給されてもよいし、予め記録媒体506に格納されており、ドライブ装置507が当該プログラムを読み出してCPU501に供給してもよい。
図9の模式ブロック図に、本実施形態の漏洩箇所分析装置の構成の一例を示す。図示のように、本実施形態の漏洩箇所分析装置200は、第1の波動検知手段101aと、第2の波動検知手段101bと、漏洩箇所算出手段105と、を含む。
図10の模式ブロック図に、本実施形態の漏洩箇所分析装置の構成の一例を示す。図示のように、本実施形態の漏洩箇所分析装置200は、さらに、波動伝搬速度算出手段104を含むこと以外、実施形態5の漏洩箇所分析装置と同様である。
第1の波動検知手段と、第2の波動検知手段と、加振手段と、漏洩箇所算出手段とを含み、
前記第1の波動検知手段は、第1の配管に設置される検知手段であり、
前記第2の波動検知手段は、前記第1の配管に接続された第2の配管に、設置される検知手段であり、
前記加振手段は、前記第1の配管において、前記第1の波動検知手段の設置箇所を基準として、前記第2の配管との非接続側に波動を加える手段であり、
前記漏洩箇所算出手段は、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する手段であることを特徴とする、漏洩箇所分析システム。
さらに、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を算出する波動伝搬速度算出手段を含み、
前記漏洩箇所算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を用いて、流体の漏洩箇所を算出することを特徴とする、付記1記載の漏洩箇所分析システム。
前記波動伝搬速度算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、一次関数で近似することを特徴とする、付記2記載の漏洩箇所分析システム。
前記波動伝搬速度算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、二次関数で近似することを特徴とする、付記2記載の漏洩箇所分析システム。
さらに、前記第1の波動検知手段及び前記第2の波動検知手段が検知した波動データを収集する波動データ収集手段を含むことを特徴とする、付記1から4のいずれかに記載の漏洩箇所分析システム。
さらに、前記波動伝搬速度算出手段に、前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さの情報を入力する配管情報入力手段を含むことを特徴とする、付記2から5のいずれかに記載の漏洩箇所分析システム。
前記配管情報入力手段は、前記第1の配管及び前記第2の配管の材質、径及び敷設位置情報からなる群から選択される少なくとも一つの情報を、前記波動伝搬速度算出手段に入力可能であることを特徴とする、付記6記載の漏洩箇所分析システム。
第1の配管において、第1の波動検知手段の設置箇所を基準として、前記第1の配管に接続された第2の配管との非接続側に波動を加え、
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出することを特徴とする、漏洩箇所分析方法。
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を算出し、
前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を用いて、流体の漏洩箇所を算出することを特徴とする、付記8記載の漏洩箇所分析方法。
前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、一次関数で近似することを特徴とする、付記9記載の漏洩箇所分析方法。
前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、二次関数で近似することを特徴とする、付記9記載の漏洩箇所分析方法。
前記第1の配管及び前記第2の配管の材質、径及び敷設位置情報からなる群から選択される少なくとも一つの情報を用いることを特徴とする、付記9から11のいずれかに記載の漏洩箇所分析方法。
第1の配管において、第1の波動検知手段の設置箇所を基準として、前記第1の配管に接続された第2の配管との非接続側に波動を加え、
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所分析方法をコンピュータに実行させることを特徴とする、プログラム。
第1の配管において、第1の波動検知手段の設置箇所を基準として、前記第1の配管に接続された第2の配管との非接続側に波動を加え、
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所分析方法をコンピュータに実行させるプログラムを記録していることを特徴とする、コンピュータ読み取り可能な記録媒体。
第1の波動検知手段と、第2の波動検知手段と、漏洩箇所算出手段とを含み、
前記第1の波動検知手段は、第1の配管に設置される検知手段であり、
前記第2の波動検知手段は、前記第1の配管に接続された第2の配管に、設置される検知手段であり、
前記漏洩箇所算出手段は、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する手段であることを特徴とする、漏洩箇所分析装置。
さらに、波動伝搬速度算出手段を含み、
前記波動伝搬速度算出手段は、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を算出する手段であり、
前記漏洩箇所算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を用いて、流体の漏洩箇所を算出する手段であることを特徴とする、付記15記載の漏洩箇所分析装置。
101a 第1の波動検知手段
101b 第2の波動検知手段
102 加振手段
103a 第1の波動データ収集手段
103b 第2の波動データ収集手段
104 波動伝搬速度算出手段
105 漏洩箇所算出手段
107 配管情報入力手段
120a 第1の配管
120b 第2の配管
123a、123b 弁栓部
200 漏洩箇所分析装置
Claims (15)
- 第1の配管に設置される第1の波動検知手段と、
前記第1の配管に接続された第2の配管に設置される第2の波動検知手段と、
前記第1の配管において、前記第1の波動検知手段の設置箇所を基準として、前記第2の配管との非接続側に波動を加える加振手段と、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所算出手段とを含むことを特徴とする、漏洩箇所分析システム。 - さらに、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を算出する波動伝搬速度算出手段を含み、
前記漏洩箇所算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を用いて、流体の漏洩箇所を算出することを特徴とする、請求項1記載の漏洩箇所分析システム。 - 前記波動伝搬速度算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、一次関数で近似することを特徴とする、請求項2記載の漏洩箇所分析システム。
- 前記波動伝搬速度算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、二次関数で近似することを特徴とする、請求項2記載の漏洩箇所分析システム。
- さらに、前記第1の波動検知手段及び前記第2の波動検知手段が検知した波動データを収集する波動データ収集手段を含むことを特徴とする、請求項1から4のいずれか一項に記載の漏洩箇所分析システム。
- さらに、前記波動伝搬速度算出手段に、前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さの情報を入力する配管情報入力手段を含むことを特徴とする、請求項2から5のいずれか一項に記載の漏洩箇所分析システム。
- 前記配管情報入力手段は、前記第1の配管及び前記第2の配管の材質、径及び敷設位置情報からなる群から選択される少なくとも一つの情報を、前記波動伝搬速度算出手段に入力可能であることを特徴とする、請求項6記載の漏洩箇所分析システム。
- 第1の配管において、第1の波動検知手段の設置箇所を基準として、前記第1の配管に接続された第2の配管との非接続側に波動を加え、
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出することを特徴とする、漏洩箇所分析方法。 - 前記第1の波動検知手段への波動伝達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を算出し、
前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を用いて、流体の漏洩箇所を算出することを特徴とする、請求項8記載の漏洩箇所分析方法。 - 前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、一次関数で近似することを特徴とする、請求項9記載の漏洩箇所分析方法。
- 前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を、それぞれ、二次関数で近似することを特徴とする、請求項9記載の漏洩箇所分析方法。
- 前記第1の配管及び前記第2の配管の材質、径及び敷設位置情報からなる群から選択される少なくとも一つの情報を用いることを特徴とする、請求項9から11のいずれか一項に記載の漏洩箇所分析方法。
- 第1の配管において、第1の波動検知手段の設置箇所を基準として、前記第1の配管に接続された第2の配管との非接続側に波動を加え、
前記第1の波動検知手段への波動到達時間と前記第2の配管に設置される第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の波動検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所分析方法をコンピュータに実行させるプログラムを記録していることを特徴とする、コンピュータ読み取り可能な記録媒体。 - 第1の配管に設置される第1の波動検知手段と、
前記第1の配管に接続された第2の配管に設置される第2の波動検知手段と、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管検知手段の設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、流体の漏洩箇所を算出する漏洩箇所算出手段とを含むことを特徴とする、漏洩箇所分析装置。 - さらに、
前記第1の波動検知手段への波動到達時間と前記第2の波動検知手段への波動到達時間との差と、
前記第1の波動検知手段の設置箇所から前記第2の配管との接続箇所までの長さ及び前記第2の配管設置箇所から前記第1の配管との接続箇所までの長さと、
に基づいて、複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を算出する手段であり、
前記漏洩箇所算出手段は、前記複数の周波数における前記第1の配管の波動伝搬速度及び前記第2の配管の波動伝搬速度を用いて、流体の漏洩箇所を算出する波動伝搬速度算出手段を含むことを特徴とする、請求項13記載の漏洩箇所分析装置。
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WO2019138641A1 (ja) * | 2018-01-15 | 2019-07-18 | コニカミノルタ株式会社 | ガス監視システム及びガス監視方法 |
CN111256044A (zh) * | 2020-03-20 | 2020-06-09 | 杭州绿洁环境科技股份有限公司 | 一种管道漏点定位方法、装置及系统 |
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JPH0526400A (ja) * | 1991-07-17 | 1993-02-02 | Kubota Corp | 管路監視装置 |
JP2001108563A (ja) * | 1999-10-05 | 2001-04-20 | Mitsubishi Electric Corp | 異常箇所検出装置 |
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JPH0216406A (ja) * | 1988-06-21 | 1990-01-19 | Toshiba Corp | 故障点方向判別装置 |
JPH0526400A (ja) * | 1991-07-17 | 1993-02-02 | Kubota Corp | 管路監視装置 |
JP2001108563A (ja) * | 1999-10-05 | 2001-04-20 | Mitsubishi Electric Corp | 異常箇所検出装置 |
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CN111256044A (zh) * | 2020-03-20 | 2020-06-09 | 杭州绿洁环境科技股份有限公司 | 一种管道漏点定位方法、装置及系统 |
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