CN107990152A - A kind of gas pipe leakage localization method based on same dual sensor - Google Patents
A kind of gas pipe leakage localization method based on same dual sensor Download PDFInfo
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- CN107990152A CN107990152A CN201711113746.3A CN201711113746A CN107990152A CN 107990152 A CN107990152 A CN 107990152A CN 201711113746 A CN201711113746 A CN 201711113746A CN 107990152 A CN107990152 A CN 107990152A
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- pipe
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- leakage
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- 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
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
Abstract
A kind of gas pipe leakage localization method based on same dual sensor of the present invention, in one end same position point installation insertion type infrasonic sensor and non-intervention type infrasonic sensor of pipe under test, and establish the leakage ranging formula based on same dual sensor in pipe under test；By the insertion type infrasonic sensor collection first sound signal that gas medium is propagated along pipe, second of acoustic signals that the collection of non-intervention type sensor is propagated along tube wall；The time difference of two infrasound signals of collection is obtained by timer；If leakage occurs, according to the spread speed of two infrasound signals and time difference, pipe leakage is positioned using leakage ranging formula.The problem of present invention sets insertion type infrasonic sensor and non-intervention type infrasonic sensor by one end same position point in pipe under test, solves sensor and must be necessarily arranged at pipe ends, caused sampled point density of setting increase.
Description
Technical field
The invention belongs to gas pipeline sonic method leakage monitoring technical field, more particularly to one kind to be based on point dual sensor
Gas pipe leakage localization method.
Background technology
Method currently used for gas pipe leakage positioning has very much, and wherein sonic method has many advantages, is to grind at present
The hot spot studied carefully, traditional acoustic method need sensor being installed on pipe ends, then reach pipeline by solving the velocity of sound and sound wave
The time difference at both ends realizes the accurate positionin of leakage.Research solves accuracy both for the velocity of sound and time difference greatly both at home and abroad
Improve what is carried out, but due to when sensor is installed on pipe ends, it is necessary to while ensureing gathered data, at present for be more stranded
Difficulty, and it is less with Installation Research is put for sensor.According to investigation, the gas pipe leakage of sonic method is related to outside Current Domestic
The patent of localization method mainly has：
United States Patent (USP) US6389881 discloses a kind of pipeline real time leak detection device and method based on sound wave technology,
The technology is filtered signal processing using pattern match filtering technique, is excluded using dynamic pressure in sensor collection tube
Noise, reduces interference, improves positioning accuracy.
Chinese patent CN104132248 discloses a kind of fluid line leakage detecting and locating method, and this method is in measured tube
It is spaced apart between two sensing devices at least provided with two sensing devices on road, and two sensing devices can be same
When the pipeline acoustic vibration in both direction is sensed, and then by solve two sensing device both directions on totally four letter
Time difference between number positions leakage.
Chinese patent 201510020155.6 discloses a kind of gas oil pipe leakage localization method based on magnitudes of acoustic waves, should
Method carries out leakage detection and location using low-frequency range magnitudes of acoustic waves is obtained after wavelet analysis is handled, and establishes leakage sound
Propagation model of the ripple in oil-gas pipeline medium, it is proposed that a kind of without considering the velocity of sound and the leakage locating method of time difference.
Described in summary, the prior art is that sensor arrangement is made leakage sound in pipe ends to gas pipe leakage positioning
Ripple signal, which travels to pipe ends, could be collected processing and positioning, and adding sampled point in pipe ends installation sensor is set
Density, installation cost is high, reduces the feasibility and applicability of sonic method popularization.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of gas pipeline based on same dual sensor
Leakage locating method, solves the problems, such as that sensor is necessarily mounted at pipe ends at this stage, reduces installation cost, increases sound wave
The feasibility and applicability of method.
The technical solution adopted in the present invention is：
A kind of gas pipe leakage localization method based on same dual sensor, comprises the following steps：
Step 1：In one end same position point installation insertion type infrasonic sensor and non-intervention type infrasonic sound of pipe under test
Wave sensor, and establish the leakage ranging formula based on same dual sensor in pipe under test；
Step 2：Gas medium is propagated along pipe when gathering gas pipe leakage by insertion type infrasonic sensor the
Acoustic signals, non-intervention type sensor gather second of the acoustic signals propagated during gas pipe leakage along tube wall；
Step 3：The time difference of collection first sound signal and second of acoustic signals is obtained by timer；
Step 4：If leakage occurs, according to the spread speed of two infrasound signals and time difference, using letting out in step 1
Leakage ranging formula positions pipe leakage.
Further, in the step 1, in pipe under test one end same position point installation insertion type infrasonic sensor and
Non-intervention type infrasonic sensor, the insertion type infrasonic sensor are fixedly installed in gas pipeline by magnetic base absorption
On the inside of tube wall, for gathering the first sound signal that gas medium is propagated along pipe；The non-intervention type infrasonic sensor
It is fixedly installed on the outside of gas pipeline tube wall by magnetic base absorption, is believed for gathering the second infrasound propagated along tube wall
Number.
Further, the first sound signal and second of acoustic signals are respectively compressional wave.
Further, the leakage ranging formula to establish process as follows：
If certain point leaks in pipeline section to be measured, first sound signal gas in pipe is obtained by conduit running situation
Spread speed c in medium1；The spread speed of second of acoustic signals in the pipe wall is obtained by pipe material, pipe thickness
c2, and the time difference between two infrasound signals is Δ t, then leaking ranging formula is：
Further, it is described the time of collection first sound signal and second of acoustic signals to be obtained by timer
Difference, including：
Time and the non-intervention type of first sound signal are collected by timer flag insertion type infrasonic sensor
Sensor collects the time of second of acoustic signals；
According to the time of timer flag, the time difference for gathering first sound signal and second of acoustic signals is calculated.
Further, the spread speed and time difference according to two infrasound signals, is determined using the leakage in step 1
Position formula positions pipe leakage, including：
Spread speed c of the first sound signal in pipe in gas medium is obtained by conduit running situation1；Pass through pipe
Road material, pipe thickness obtain the spread speed c of second of acoustic signals in the pipe wall2, two infrasound signal acquisitions when
Between difference be Δ t, then leak position is：
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention in one end same position point of pipe under test by setting insertion type infrasonic sensor and non-intervention
Formula infrasonic sensor, re-establishes the leakage ranging formula based on same dual sensor, is situated between according to infrasound signal in gas
Time difference between the velocity of sound propagated in matter and the velocity of sound propagated in the pipe wall, and two infrasound signals, it is fixed leak
Position, reduces installation cost, adds the feasibility and applicability of leakage locating method；
(2) the method for the present invention is simple, easy to operate, and insertion type is set by one end same position point in pipe under test
Sonic sensor and non-intervention type infrasonic sensor, solve sensor and must be necessarily arranged at pipe ends, caused sampled point
The problem of density of setting increase.
Brief description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are used to explain the application, do not form the improper restriction to the application.
Fig. 1 is the gas pipe leakage localization method flow chart disclosed by the embodiments of the present invention based on same dual sensor.
Embodiment
It is noted that described further below is all illustrative, it is intended to provides further instruction to the application.It is unless another
Indicate, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, it is that sensor arrangement exists to exist in the prior art to gas pipe leakage positioning
Pipe ends, processing and positioning could be collected by leakage acoustic signals is traveled to pipe ends, installed and sensed in pipe ends
Device adds sampled point density of setting, and installation cost is high, reduces the feasibility of sonic method popularization and the deficiency of applicability, in order to
Technical problem as above is solved, present applicant proposes a kind of gas pipe leakage localization method based on same dual sensor.
As shown in Figure 1, a kind of gas pipe leakage localization method based on same dual sensor is present embodiments provided, should
The gas pipe leakage based on same dual sensor that gas pipe leakage localization method based on same dual sensor is based on
Alignment system, including insertion type infrasonic sensor, non-intervention type infrasonic sensor, timer, signal conditioner, filtering
Device, analog-digital converter, data transmission medium and central control computer, the insertion type infrasonic sensor and non-intervention type infrasound
Sensor is installed on one end same position point of pipe under test, and the insertion type infrasonic sensor is used to gather the gas along pipe
The infrasound signal of Medium Propagation, the non-intervention type infrasonic sensor are used to propagate along tube wall when gathering gas pipe leakage
Infrasound signal, it is the time for the infrasound signal that the timer flag non-intervention type infrasonic sensor collects, described
Signal conditioner provides power supply for insertion type infrasonic sensor and non-intervention type infrasonic sensor and carries out signal condition, institute
Wave filter is stated by background noise and interference filtering in infrasound signal, the telecommunications that the analog-digital converter collects sensor
Number digital signal being converted to, transformed digital signal is transmitted to the central control computer by the data transmission medium, into
Row data store and analysis.
Insertion type infrasonic sensor and non-intervention type infrasonic sensor are installed on one end of pipe under test in the system
Same position point, insertion type infrasonic sensor are fixedly installed on the inside of gas pipeline tube wall by magnetic base absorption, passed through
The infrasound signal that gas medium is propagated along pipe during sense gasses pipe leakage, non-intervention type infrasonic sensor pass through magnetism
Pedestal absorption is fixedly installed on the inside of gas pipeline tube wall, is believed by the infrasound propagated during sense gasses pipe leakage along tube wall
Number carry out leak detection, the two is detected at the same time, and specific work process is：Insertion type infrasonic sensor and non-intervention type infrasound
Sensor is respectively by magnetic base absorption in pipe under test, and protective shell, which screws, makes stress membrane be close to pipe under test, sensing
The infrasound signal propagated along gas medium or the infrasound signal propagated along tube wall, produce vibration displacement, make what is be in contact with it
Acceleration compensation block produces vibration acceleration, and then is deformed piezo-electric crystal so as to produce electric charge, is guided by electrode, passes
Conductive path transmits and integrated amplifier amplification, and signal is exported finally by signal output part.
The present invention passes through the insertion type infrasonic sensor of one end same position point installed in pipe under test and non-intervention
Formula infrasonic sensor, gas medium is propagated along pipe during sense gasses pipe leakage infrasound signal and is propagated along tube wall
Infrasound signal carries out leak detection, avoids and installation is punched on pipeline, so as to not influence the operation and flowing of existing pipeline
Situation.
The gas pipe leakage localization method based on same dual sensor comprises the following steps：
Step 101：In one end same position point installation insertion type infrasonic sensor and non-intervention type of pipe under test
Sonic sensor, and establish the leakage ranging formula based on same dual sensor in pipe under test；
Step 102：The gas medium propagation along pipe when gathering gas pipe leakage by insertion type infrasonic sensor
First sound signal, non-intervention type sensor gather second of the acoustic signals propagated during gas pipe leakage along tube wall；
Step 103：The time difference of collection first sound signal and second of acoustic signals is obtained by timer；
Step 104：If leakage occurs, according to the spread speed of two infrasound signals and time difference, using in step 1
Leakage ranging formula positions pipe leakage.
In the present embodiment, in order to improve due in pipe ends, traveling to leakage acoustic signals sensor arrangement
Pipe ends could be collected processing and positioning, add sampled point density of setting in pipe ends installation sensor, be mounted to
This height, reduce sonic method popularization feasibility and applicability the defects of, in pipe under test one end same position point installation intervention
Formula infrasonic sensor and non-intervention type infrasonic sensor, the insertion type infrasonic sensor are adsorbed solid by magnetic base
Dingan County is loaded on gas pipeline tube wall inner side, for gathering the first sound signal that gas medium is propagated along pipe；Non- Jie
Enter formula infrasonic sensor to be fixedly installed on the outside of gas pipeline tube wall by magnetic base absorption, propagated for gathering along tube wall
Second of acoustic signals.Wherein, the first sound signal and second of acoustic signals are respectively compressional wave.
In the present embodiment, the process for establishing the leakage ranging formula is as follows：
If certain point leaks in pipeline section to be measured, first sound signal gas in pipe is obtained by conduit running situation
Spread speed c in medium1；The spread speed of second of acoustic signals in the pipe wall is obtained by pipe material, pipe thickness
c2, and the time difference between two infrasound signals is Δ t, then leaking ranging formula is：
Therefore, when being positioned to gas pipe leakage, it is thus necessary to determine that the following operating parameter of pipe under test：For the first time
The velocity of sound that the velocity of sound that acoustic signals are propagated in gas medium, second of acoustic signals are propagated in the pipe wall, and two infrasounds
Time difference between signal.
In order to obtain the time difference between two infrasound signals, first pass through timer flag insertion type infrasonic sensor
Collect the time of first sound signal and non-intervention type sensor collects the time of second of acoustic signals；Then basis
The time of timer flag, calculates the time difference of collection first sound signal and second of acoustic signals.
When solving leak position, the present invention is detected using existing method and judges whether pipeline leaks.Such as may be used
Using central control computer according to the first sound signal and second of acoustic signals that collect, judge whether pipeline is let out
Leakage.
If the pipeline leaks, according to the spread speed of two infrasound signals and time difference, positioned using leakage
Formula positions pipe leakage.Positioning detailed process is carried out to pipe leakage to be included：
Spread speed c of the first sound signal in pipe in gas medium is obtained by conduit running situation1；Pass through pipe
Road material, pipe thickness obtain the spread speed c of second of acoustic signals in the pipe wall2, two infrasound signal acquisitions when
Between difference be Δ t, then leak position is：
It can be seen from the above description that the application the above embodiments realize following technique effect：
(1) present invention in one end same position point of pipe under test by setting insertion type infrasonic sensor and non-intervention
Formula infrasonic sensor, re-establishes the leakage ranging formula based on same dual sensor, is situated between according to infrasound signal in gas
Time difference between the velocity of sound propagated in matter and the velocity of sound propagated in the pipe wall, and two infrasound signals, it is fixed leak
Position, reduces installation cost, adds the feasibility and applicability of leakage locating method；
(2) the method for the present invention is simple, easy to operate, and insertion type is set by one end same position point in pipe under test
Sonic sensor and non-intervention type infrasonic sensor, solve sensor at this stage and must arrange and be arranged in pipe ends, lead
The problem of sampled point density of setting increase of cause.
Although above-mentioned be described the embodiment of the present invention with reference to attached drawing, model not is protected to the present invention
The limitation enclosed, those skilled in the art should understand that, on the basis of technical scheme, those skilled in the art are not
Need to make the creative labor the various modifications that can be made or deformation still within protection scope of the present invention.
Claims (6)
1. a kind of gas pipe leakage localization method based on same dual sensor, it is characterized in that, comprise the following steps：
Step 1：Passed in one end same position point installation insertion type infrasonic sensor and non-intervention type infrasound of pipe under test
Sensor, and establish the leakage ranging formula based on same dual sensor in pipe under test；
Step 2：The first time that gas medium is propagated along pipe when gathering gas pipe leakage by insertion type infrasonic sensor
Acoustic signals, non-intervention type sensor gather second of the acoustic signals propagated during gas pipe leakage along tube wall；
Step 3：The time difference of collection first sound signal and second of acoustic signals is obtained by timer；
Step 4：If leakage occurs, according to the spread speed of two infrasound signals and time difference, determined using the leakage in step 1
Position formula positions pipe leakage.
2. the gas pipe leakage localization method according to claim 1 based on same dual sensor, it is characterized in that, it is described
In step 1, same position point installation insertion type infrasonic sensor and non-intervention type infrasonic sensor in pipe under test one end,
The insertion type infrasonic sensor is fixedly installed on the inside of gas pipeline tube wall by magnetic base absorption, for gathering along pipe
The first sound signal that interior gas medium is propagated；The non-intervention type infrasonic sensor adsorbs fixed peace by magnetic base
Loaded on second of the acoustic signals on the outside of gas pipeline tube wall, propagated for collection along tube wall.
3. the gas pipe leakage localization method according to claim 2 based on same dual sensor, it is characterized in that, it is described
First sound signal and second of acoustic signals are respectively compressional wave.
4. the gas pipe leakage localization method according to claim 1 based on same dual sensor, it is characterized in that, it is described
Leakage ranging formula to establish process as follows：
If certain point leaks in pipeline section to be measured, first sound signal gas medium in pipe is obtained by conduit running situation
In spread speed c1；The spread speed c of second of acoustic signals in the pipe wall is obtained by pipe material, pipe thickness2, and
Time difference between two infrasound signals is Δ t, then leaks ranging formula and be：
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5. the gas pipe leakage localization method according to claim 1 based on same dual sensor, it is characterized in that, it is described
The time difference of collection first sound signal and second of acoustic signals will be obtained by timer, including：
The time of first sound signal is collected by timer flag insertion type infrasonic sensor and non-intervention type senses
Device collects the time of second of acoustic signals；
According to the time of timer flag, the time difference for gathering first sound signal and second of acoustic signals is calculated.
6. the gas pipe leakage localization method according to claim 1 based on same dual sensor, it is characterized in that,
The spread speed and time difference according to two infrasound signals, using the leakage ranging formula in step 1 to pipeline
Leakage is positioned, including：
Spread speed c of the first sound signal in pipe in gas medium is obtained by conduit running situation1；Pass through pipeline material
Matter, pipe thickness obtain the spread speed c of second of acoustic signals in the pipe wall2, the time difference of two infrasound signal acquisitions
For Δ t, then leak position is：
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109001A (en) * | 2021-04-07 | 2021-07-13 | 昆仑数智科技有限责任公司 | Detection method, detection device, electronic equipment and computer-readable storage medium |
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| CN103672415A (en) * | 2013-12-06 | 2014-03-26 | 中国石油大学(华东) | Gas pipeline leakage detecting and positioning system and method based on non-intrusive sensor |
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| CN105953080A (en) * | 2016-07-18 | 2016-09-21 | 中国石油大学(华东) | Sound wave leakage positioning method based on same-side sensor arrangement |
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| JPH1062292A (en) * | 1996-08-23 | 1998-03-06 | Tokyo Gas Co Ltd | Signal processing method in pipe leakage-position locating method |
| CN201053917Y (en) * | 2007-05-28 | 2008-04-30 | 加拿大联邦华扬国际集团股份有限公司 | Acoustic wave leakage-determining system monitor for monitoring gas pipe leakage |
| CN103672415A (en) * | 2013-12-06 | 2014-03-26 | 中国石油大学(华东) | Gas pipeline leakage detecting and positioning system and method based on non-intrusive sensor |
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