CN104696711A - Method for rapid and accurate positioning of pipeline leakage point - Google Patents
Method for rapid and accurate positioning of pipeline leakage point Download PDFInfo
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- CN104696711A CN104696711A CN201310657847.2A CN201310657847A CN104696711A CN 104696711 A CN104696711 A CN 104696711A CN 201310657847 A CN201310657847 A CN 201310657847A CN 104696711 A CN104696711 A CN 104696711A
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Abstract
The invention provides a method for rapid and accurate positioning of a pipeline leakage point, which comprises a monitoring center and a network. The method is characterized in that transmission speed parameters of liquid negative pressure waves in a pipeline to be detected are firstly measured through an initial station sensor collection device A, a first station sensor collection device C, a Nth station sensor collection device D, and a terminal station sensor collection device B which are arranged on the pipeline to be detected; calculation and positioning of the leakage point are then carried out through the following steps: determination of the negative pressure waves (the formula is as shown in the description). The method provided by the invention has the advantages that the pipeline leakage point can be rapidly detected and accurately positioned, so that the leakage loss is reduced, and remarkable economic benefits are achieved.
Description
Technical field
The invention belongs to pipe leakage point detecting method, particularly a kind of pipe leakage point method of quick and precisely locating.
Background technique
Along with the development and progress of modern civilization, various pipes in human lives more important, from schedule life water, combustion gas to the oil of industry blood, invariably transported by pipeline.The thing followed, along with conduit deteriorates, theft and emergency case, pipe leakage also annoyings related personnel and department always, therefore, how can find that pipe leakage is reduced to the minimum direction being each side always and making great efforts loss the very first time.In pipeline leakage testing, usually adopt the mode of manual inspection at present, this mode finds always delayed in human input and leak source, and drop into and avoid not being directly proportional in loss, leakage loss is large.
Summary of the invention
The object of the invention is to overcome above-mentioned technical deficiency, there is provided a kind of method adopting Wavelet transformation analysis and Multi-source Information Fusion, the distance of the time difference of the pressure wave received by pipeline upstream and downstream monitoring site and leakage point distance monitored upstream point position is calculated determines the method that pipe leakage point is quick and precisely located.
The technological scheme that technical solution problem of the present invention adopts is: a kind of method that pipe leakage point is quick and precisely located, comprise monitoring center, network, initial station sensor collecting device A, equipment C taked by website one sensor, website N sensor collecting device D and terminal sensor collecting device B, it is characterized in that the initial station sensor collecting device A first by tested pipeline is established, equipment C taked by website one sensor, in the tested pipeline that website N sensor collecting device D and terminal sensor collecting device B measures liquid negative pressure Reeb transmission speed parameter after as follows calculate location leak source:
One. the determination of negative pressure wave
In formula: the distance of X-leakage point distance monitored upstream point position, m;
Distance between L-upstream and downstream monitoring site, m;
In V-pipeline medium, the transmission speed of negative pressure wave, m/s;
△ t-upstream and downstream monitoring site receives the time difference of pressure wave, s.
Can be drawn by above formula, the key technology of negative pressure wave location mainly comprises: the identification of negative pressure wave and upstream and downstream monitoring site capture the time of negative pressure wave;
Two. Wavelet transformation analysis
The identification of negative pressure wave adopts Wavelet transformation analytic method:
Small echo is defined as follows, if
, its Fourier transform is
; When
meet enabled condition
time, we claim
a wavelet or morther wavelet.By generating function
through stretching and after translation, just can obtaining a wavelet sequence; For continuous print situation, wavelet sequence is:
Wherein:
-contraction-expansion factor,
-shift factor.
Consider the feasibility of numerical calculation and the simplicity of theory analysis, need to carry out sliding-model control to small echo;
Family of functions
in, restriction
all centrifugal pump, so obtain discrete wavelet; At this moment, for fixing lengthening or shortening the step length
and fixed value
, choose
, at this moment corresponding discrete family is exactly:
Get
=2,
=1, being namely equivalent to continuous wavelet, on yardstick, only carried out binary system discrete, and consecutive variations is still got in displacement, claims this kind of small echo to be dyadic wavelet.Be expressed as
Concrete calculating realizes adopting the special algorithm of horse traction and A’trous algorithm;
Three. Multi-source Information Fusion
The capture time of negative pressure wave affects by following factor:
1. whether each monitoring site data acquisition equipment is synchronous with the time of Surveillance center;
2. the sampling period of each monitory point bit data collecting device;
3. whether the sampling initial time of each monitory point bit data collecting device is synchronous;
Because negative pressure wave transmission speed is in the duct on average at 1100m/s, above three kinds of factors cause the error producing 1 second in negative pressure wave capture time, make error in point measurement more than 1km exactly; Beyond synchronous, also use Multi-source Information Fusion (MIF); Multi-source Information Fusion refers to the multi-sensor information resource utilizing different time and space, adopt computer technology to the multisensor observation information obtained chronologically in addition automatic analysis, comprehensive, domination and use, obtain and the conformity of tested pipeline is explained and description, calculate and location leak source to complete required decision-making.
The invention has the beneficial effects as follows: this invention detects fast to Pipeline Leakage Point, accurate positioning reduces leakage loss, remarkable in economical benefits.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, illustrate with embodiment.
Fig. 1 is the method system schematic diagram that pipe leakage point is quick and precisely located.
In figure: 1-monitoring center; 2-network; 3-tested pipeline; 4-initial station sensor collecting device A; Equipment C taked by 5-website one sensor; 6-website N sensor collecting device D; 7-terminal sensor collecting device B.
Embodiment
Embodiment, with reference to accompanying drawing, a kind of method that pipe leakage point is quick and precisely located, comprise monitoring center 1, network 2, initial station sensor collecting device A4, equipment C5 taked by website one sensor, website N sensor collecting device D6 and terminal sensor collecting device B7, it is characterized in that the initial station sensor collecting device A4 first by tested pipeline 3 is established, equipment C5 taked by website one sensor, in the tested pipeline 3 that website N sensor collecting device D6 and terminal sensor collecting device B7 measures liquid negative pressure Reeb transmission speed parameter after as follows calculate location leak source:
One. the determination of negative pressure wave
In formula: the distance of X-leakage point distance monitored upstream point position, m;
Distance between L-upstream and downstream monitoring site, m;
In V-pipeline medium, the transmission speed of negative pressure wave, m/s;
△ t-upstream and downstream monitoring site receives the time difference of pressure wave, s.
Can be drawn by above formula, the key technology of negative pressure wave location mainly comprises: the identification of negative pressure wave and upstream and downstream monitoring site capture the time of negative pressure wave;
Two. Wavelet transformation analysis
The identification of negative pressure wave adopts Wavelet transformation analytic method:
Small echo is defined as follows, if
, its Fourier transform is
; When
meet enabled condition
time, we claim
a wavelet or morther wavelet.By generating function
through stretching and after translation, just can obtaining a wavelet sequence; For continuous print situation, wavelet sequence is:
Wherein:
-contraction-expansion factor,
-shift factor.
Consider the feasibility of numerical calculation and the simplicity of theory analysis, need to carry out sliding-model control to small echo;
Family of functions
in, restriction
all centrifugal pump, so obtain
Discrete wavelet; At this moment, for fixing lengthening or shortening the step length
and fixed value
, choose
, at this moment corresponding discrete family is exactly:
Get
=2,
=1, being namely equivalent to continuous wavelet, on yardstick, only carried out binary system discrete, and consecutive variations is still got in displacement, claims this kind of small echo to be dyadic wavelet.Be expressed as
Concrete calculating realizes adopting the special algorithm of horse traction and A’trous algorithm;
Three. Multi-source Information Fusion
The capture time of negative pressure wave affects by following factor:
1. whether each monitoring site data acquisition equipment is synchronous with the time of Surveillance center;
2. the sampling period of each monitory point bit data collecting device;
3. whether the sampling initial time of each monitory point bit data collecting device is synchronous;
Because negative pressure wave transmission speed is in the duct on average at 1100m/s, above three kinds of factors cause the error producing 1 second in negative pressure wave capture time, make error in point measurement more than 1km exactly; Beyond synchronous, also use Multi-source Information Fusion (MIF); Multi-source Information Fusion refers to the multi-sensor information resource utilizing different time and space, adopt computer technology to the multisensor observation information obtained chronologically in addition automatic analysis, comprehensive, domination and use, obtain and the conformity of tested pipeline 3 is explained and description, calculate and location leak source to complete required decision-making.
Claims (1)
1. the pipe leakage point method of quick and precisely locating, comprise monitoring center, network, initial station sensor collecting device A, website one sensor take equipment C, website N sensor collecting device D and terminal sensor collecting device B, after it is characterized in that the transmission speed parameter of liquid negative pressure Reeb in the tested pipeline first taking equipment C, website N sensor collecting device D and terminal sensor collecting device B to measure by initial station sensor collecting device A that tested pipeline is established, website one sensor, calculate location leak source as follows:
One. the determination of negative pressure wave
In formula: the distance of X-leakage point distance monitored upstream point position, m;
Distance between L-upstream and downstream monitoring site, m;
In V-pipeline medium, the transmission speed of negative pressure wave, m/s;
△ t-upstream and downstream monitoring site receives the time difference of pressure wave, s;
Can be drawn by above formula, the key technology of negative pressure wave location mainly comprises: the identification of negative pressure wave and upstream and downstream monitoring site capture the time of negative pressure wave;
Two. Wavelet transformation analysis
The identification of negative pressure wave adopts Wavelet transformation analytic method:
Small echo is defined as follows, if
, its Fourier transform is
; When
meet enabled condition
time, we claim
a wavelet or morther wavelet;
By generating function
through stretching and after translation, just can obtaining a wavelet sequence; For continuous print situation, wavelet sequence is:
Wherein:
-contraction-expansion factor,
-shift factor;
Consider the feasibility of numerical calculation and the simplicity of theory analysis, need to carry out sliding-model control to small echo;
Family of functions
in, restriction
all centrifugal pump, so obtain discrete wavelet; At this moment, for fixing lengthening or shortening the step length
and fixed value
, choose
, at this moment corresponding discrete family is exactly:
Get
=2,
=1, being namely equivalent to continuous wavelet, on yardstick, only carried out binary system discrete, and consecutive variations is still got in displacement, claims this kind of small echo to be dyadic wavelet;
Be expressed as
Concrete calculating realizes adopting the special algorithm of horse traction and A’trous algorithm;
Three. Multi-source Information Fusion
The capture time of negative pressure wave affects by following factor:
1). whether each monitoring site data acquisition equipment is synchronous with the time of Surveillance center;
2). the sampling period of each monitory point bit data collecting device;
3). whether the sampling initial time of each monitory point bit data collecting device is synchronous;
Because negative pressure wave transmission speed is in the duct on average at 1100m/s, above three kinds of factors cause the error producing 1 second in negative pressure wave capture time, make error in point measurement more than 1km exactly; Beyond synchronous, also use Multi-source Information Fusion (MIF); Multi-source Information Fusion refers to the multi-sensor information resource utilizing different time and space, adopt computer technology to the multisensor observation information obtained chronologically in addition automatic analysis, comprehensive, domination and use, obtain and the conformity of tested pipeline is explained and description, calculate and location leak source to complete required decision-making.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135216A (en) * | 2015-07-30 | 2015-12-09 | 云南大红山管道有限公司 | Method for locating leakage position of ore pulp conveying pipe |
| CN106439503A (en) * | 2016-11-23 | 2017-02-22 | 渤海大学 | Pipeline leakage detection and positioning device |
| CN107084313A (en) * | 2017-05-16 | 2017-08-22 | 云南大红山管道有限公司 | Ore slurry pipeline leaks positioning alarm system and method |
| CN108506732A (en) * | 2018-04-25 | 2018-09-07 | 江苏太平橡胶股份有限公司 | Oil pipeline anti-leak monitors system |
| CN114366869A (en) * | 2022-01-17 | 2022-04-19 | 南方医科大学南方医院 | Negative pressure drainage system for abdominal operation |
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| CN101968162A (en) * | 2010-09-30 | 2011-02-09 | 东北大学 | Pipeline leakage positioning system and method based on collaborative detection with negative pressure wave and sound wave |
| CN102563361A (en) * | 2012-01-18 | 2012-07-11 | 中国石油大学(华东) | Device and method for detecting and positioning leakage of gas transmission pipeline based on conventional data and sound wave signals |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135216A (en) * | 2015-07-30 | 2015-12-09 | 云南大红山管道有限公司 | Method for locating leakage position of ore pulp conveying pipe |
| CN106439503A (en) * | 2016-11-23 | 2017-02-22 | 渤海大学 | Pipeline leakage detection and positioning device |
| CN107084313A (en) * | 2017-05-16 | 2017-08-22 | 云南大红山管道有限公司 | Ore slurry pipeline leaks positioning alarm system and method |
| CN108506732A (en) * | 2018-04-25 | 2018-09-07 | 江苏太平橡胶股份有限公司 | Oil pipeline anti-leak monitors system |
| CN114366869A (en) * | 2022-01-17 | 2022-04-19 | 南方医科大学南方医院 | Negative pressure drainage system for abdominal operation |
| CN114366869B (en) * | 2022-01-17 | 2022-12-09 | 南方医科大学南方医院 | Negative pressure drainage system for abdominal operation |
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Application publication date: 20150610 |