CN101240874A - Oil pipeline leakage detection device based on initiative acoustic emission principle and method thereof - Google Patents
Oil pipeline leakage detection device based on initiative acoustic emission principle and method thereof Download PDFInfo
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- CN101240874A CN101240874A CNA2008100523723A CN200810052372A CN101240874A CN 101240874 A CN101240874 A CN 101240874A CN A2008100523723 A CNA2008100523723 A CN A2008100523723A CN 200810052372 A CN200810052372 A CN 200810052372A CN 101240874 A CN101240874 A CN 101240874A
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Abstract
The present invention provides an oil pipeline leak detector based on the active sound transmitting principle and method. The detector includes an electroacoustic transducer, a signal generator, an acoustic emission transducer, a preamplifier and a signal collector. The detecting method adopts active sound emitting technology, real-time detecting sound energy changes of signal generated by electroacoustic transducer mounted on one end of the pipeline utilizing the acoustic emission transducer, and judging whether exist oil-stolen pipe branch or normal leakage in the pipeline, thus the device has an accurate detecting result and high sensitivity, preventing human made or normal leakage.
Description
Technical field
The present invention relates to a kind of oil pipeline leakage detection device and method, belong to the pipeline monitoring technical field based on the active acoustic emission principle.
Background technique
Pipeline transport had become one of five big transport services of running neck and neck with railway, highway, aviation, water transport already at present.But, along with increasing of pipeline, the growth of pipeline service time, the probability that the pipe leakage accident takes place is also increasing.As everyone knows, if the fluid of carrying in the pipeline has danger and contaminativity,, in case taking place, leakage accident will cause huge life and property loss and environmental pollution so such as oil, rock gas.Particularly in China, the oil gas pipe network has quite a few and steps into declining period, and suffers unprecedented artificial destruction again over year surplus in the of nearly ten, and therefore the loss that is caused by leakage accident is very huge, thereby has seriously influenced the development of pipeline industry.
In addition, the oil transport pipeline of China is subjected to the unprecedented destruction of drilling hole of oil stolen molecule before and after 2000, thereby caused the great attention of relevant department and scientific research institutions, at present existing tens of family units have carried out the pipeline leakage testing Study on Technology, and the serious pipeline of partly being damaged has been installed leak detecting device.These devices for the arrogance of hitting the stolen molecule, were avoided the pipe leakage accident further to enlarge and have been played important effect in the specific period of the movable wildness of China's drilling hole of oil stolen.In No. the 02235420.4th, No. the 96121000.1st, 99107241.3, Chinese invention patent application and the Chinese utility application content of this technical field has been done comparatively detailed narration.Pressure, changes in flow rate or suction wave that these detecting methods mainly are based on the pipeline inner fluid judge whether to exist leakage accident.Though these methods are relatively more responsive for the extensive sudden variation of the pressure of pipeline inner fluid, flow, thereby can detect artificial or normal leakage accident effectively.But, since some pipeline install leak detecting device just might before suffered the destruction of stolen molecule, be that the stolen molecule is chosen in the shelter usually and picks out an arm carry out stolen to far place from oil transport pipeline, these branch road mosts of the time often open, therefore can not make flow and pressure in the oil transport pipeline produce bigger fluctuation, can't detect yet even conventional leak detecting device has been installed on this pipeline like this.In addition, the method that the stolen molecule is slowly drained the oil as if employing in the stolen process, or the relative oil transport pipeline of its arm is very thin, and then Chang Gui leak detecting device also can't detect such leakage.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of accuracy of testing result and highly sensitive pipeline leakage testing device and method based on the active acoustic emission principle.
In order to achieve the above object, the pipeline leakage testing device based on the active acoustic emission principle provided by the invention comprises electroacoustic transducer, signal generator, calibrate AE sensor, preamplifier and signal picker; Wherein electroacoustic transducer is installed on the end tube wall of pipeline, and its part-structure extend in the fluid of pipe interior, and links to each other with the signal generator that is installed in the pipeline outside by signal-transmitting cable; Calibrate AE sensor is installed on the other end tube wall of pipeline, and its sensing element extend in the fluid of pipe interior, and joins with preamplifier that is installed in the pipeline outside and signal picker successively by signal-transmitting cable.
Described signal picker comprises signal condition module, A/D modular converter and the computer that links to each other successively.
Described signal-transmitting cable adopts concentric cable, therefore has good interference free performance.
Pipeline leakage detection method based on the active acoustic emission principle provided by the invention is at first to utilize signal generator to send the large power, electrically signal, and is transferred to electroacoustic transducer by signal-transmitting cable; Electroacoustic transducer converts thereof into acoustic signal after receiving above-said current signal, and is that carrier is to pipeline both direction transmission along the line with the fluid of pipe interior; Convert thereof into electrical signal after the calibrate AE sensor that is installed in the pipeline the other end receives this oscillating signal, and be transferred to preamplifier via signal-transmitting cable; After amplifying this signal, preamplifier is transferred to signal condition module in the signal picker via signal-transmitting cable again; The signal condition module is carried out Shelving to signal, and filtered signal is adjusted into the scope that can be accepted by the A/D modular converter, is converted to digital signal by the A/D modular converter again, and this digital signal is transferred in the computer by computer interface; Judge according to the acoustic energy signal energy size that receives whether ducted flow changes by computer at last.
Oil pipeline leakage detection device and method based on the active acoustic emission principle provided by the invention is to adopt initiatively acoustic emission technique, and utilize calibrate AE sensor to detect the acoustic energy variation of sending signal by the electroacoustic transducer that is installed in pipeline one end in real time, and judge whether have stolen arm or normal leakage position in the pipeline with this, so the accuracy of testing result and highly sensitive, thereby can prevent that artificial or normal leakage accident from taking place.
Description of drawings
Fig. 1 is that the pipeline leakage testing device based on the active acoustic emission principle provided by the invention constitutes schematic representation.
Embodiment
Below in conjunction with the drawings and specific embodiments the pipeline leakage testing device and method based on the active acoustic emission principle provided by the invention is elaborated.
As shown in Figure 1, the pipeline leakage testing device based on the active acoustic emission principle provided by the invention comprises electroacoustic transducer 1, signal generator 2, calibrate AE sensor 3, preamplifier 5 and signal picker 6; Wherein electroacoustic transducer 1 is installed on the end tube wall of pipeline 10, and its part-structure extend in the fluid of pipe interior, and links to each other with the signal generator 2 that is installed in pipeline 10 outsides by signal-transmitting cable 4; Calibrate AE sensor 3 is installed on the other end tube wall of pipeline 10, and its sensing element extend in the fluid of pipe interior, and joins with preamplifier 5 that is installed in pipeline 10 outsides and signal picker 6 successively by signal-transmitting cable 4.
Described signal picker 6 comprises signal condition module 7, A/D modular converter 8 and the computer 9 that links to each other successively.
Described signal-transmitting cable 4 adopts concentric cable, therefore has good interference free performance.
Utilize above-mentioned pipeline leakage testing device as follows: at first to utilize signal generator 2 to send the large power, electrically signal to the process that pipeline detects based on the active acoustic emission principle, to satisfy the required energy of excitation electroacoustic transducer 1, in addition, the electrical signal that signal generator 2 sends has certain frequency, signal form is sinusoidal wave, and frequency is a low frequency signal, and scope is that 1～100Hz all can, concrete frequency values can be determined by experiment, and is transferred to electroacoustic transducer 1 by signal-transmitting cable 4; Electroacoustic transducer 1 converts thereof into acoustic signal after receiving above-said current signal, and be carrier to pipeline 10 both directions transmission along the line with the fluid of pipeline 10 inside, because the frequency of this signal is very low and can propagate larger distance, the calibrate AE sensor 3 that therefore can be installed in pipeline 10 the other ends receives; Calibrate AE sensor 3 is a kind of piezoelectric energy-conversion device, and it converts thereof into electrical signal after receiving this oscillating signal, and is transferred to preamplifier 5 via signal-transmitting cable 4; Preamplifier 5 will amplify from the weak acoustic signal that calibrate AE sensor 3 is sensed, and preliminary some noise signals of filtering, and then be transferred to signal condition module 7 in the signal picker 6 via signal-transmitting cable 4; 7 pairs of signals of signal condition module carry out Shelving, narrow-band pass filter is adopted in its filtering, filter center point is for sending the frequency of signal, and filtered signal is adjusted into the scope that to be accepted by A/D modular converter 8, be converted to digital signal by A/D modular converter 8 again, and A/D modular converter 8 transfers to this digital signal in the computer 6 by not shown computer interface; Judge according to the acoustic energy signal energy size that receives whether the flow in the pipeline 10 changes by computer 6 at last.When no stolen arm 11 or normal leakage position existed on the pipeline 10 between electroacoustic transducer 1 and calibrate AE sensor 3, the acoustic energy signal energy that is received by computer 6 should not change in detection time; When having stolen arm 11 or normal leakage position on the pipeline 10 between electroacoustic transducer 1 and calibrate AE sensor 3, even stolen arm 11 relative duct size 10 are very thin, as long as the stolen molecule is the valve 12 on the unlatching stolen arm 11, part acoustic energy will spread out of from this branch road, therefore the acoustic energy signal energy that is received by computer 6 in the above two kinds of cases should be in detection time from large to small, if energy changes from small to big again after after a while again, at this moment just can conclude that the stolen molecule turns down the valve on the stolen arm 11 12, otherwise can conclude that then it opens valve 12 greatly.In addition, if the normal arm of opening in the pipeline 10 also can exert an influence to this detection device, therefore in testing process, to stop operation, or remove the known warning that operation caused that normal arm is carried out by the method for artificial judgement to these normal arms.
Claims (4)
1, a kind of pipeline leakage testing device based on the active acoustic emission principle is characterized in that: described pipeline leakage testing device based on the active acoustic emission principle comprises electroacoustic transducer (1), signal generator (2), calibrate AE sensor (3), preamplifier (5) and signal picker (6); Wherein electroacoustic transducer (1) is installed on the end tube wall of pipeline (10), and its part-structure extend in the fluid of pipe interior, and links to each other by signal-transmitting cable (4) signal generator (2) outside with being installed in pipeline (10); Calibrate AE sensor (3) is installed on the other end tube wall of pipeline (10), its sensing element extend in the fluid of pipe interior, and outside preamplifier (5) and signal picker (6) joins with being installed in pipeline (10) successively by signal-transmitting cable (4).
2, the pipeline leakage testing device based on the active acoustic emission principle according to claim 1 is characterized in that: described signal picker (6) comprises signal condition module (7), A/D modular converter (8) and the computer (9) that links to each other successively.
3, the pipeline leakage testing device based on the active acoustic emission principle according to claim 1 is characterized in that: described signal-transmitting cable (4) adopts concentric cable, therefore has good interference free performance.
4, a kind of described pipeline leakage testing Device Testing method of claim 1 of utilizing based on the active acoustic emission principle, it is characterized in that: described detecting method is at first to utilize signal generator (2) to send the large power, electrically signal, and is transferred to electroacoustic transducer (1) by signal-transmitting cable (4); Convert thereof into acoustic signal after electroacoustic transducer (1) receives above-said current signal, and be that carrier is to pipeline (10) both direction transmission along the line with the inner fluid of pipeline (10); Convert thereof into electrical signal after the calibrate AE sensor (3) that is installed in pipeline (10) the other end receives this oscillating signal, and be transferred to preamplifier (5) via signal-transmitting cable (4); After amplifying this signal, preamplifier (5) is transferred to signal condition module (7) in the signal picker (6) via signal-transmitting cable (4) again; Signal condition module (7) is carried out Shelving to signal, and filtered signal is adjusted into the scope that to be accepted by A/D modular converter (8), be converted to digital signal by A/D modular converter (8) again, and this digital signal is transferred in the computer (6) by computer interface; Judge according to the acoustic energy signal energy size that receives whether the flow in the pipeline (10) changes by computer (6) at last.
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| CNA2008100523723A CN101240874A (en) | 2008-03-05 | 2008-03-05 | Oil pipeline leakage detection device based on initiative acoustic emission principle and method thereof |
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| CNA2008100523723A CN101240874A (en) | 2008-03-05 | 2008-03-05 | Oil pipeline leakage detection device based on initiative acoustic emission principle and method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537671A (en) * | 2012-03-07 | 2012-07-04 | 张钧 | Sensor module for monitoring leakage of natural gas transmission pipeline |
| CN103258577A (en) * | 2013-04-16 | 2013-08-21 | 中国核电工程有限公司 | Method for break simulation in high energy pipe leakage monitoring experiment of nuclear power station |
| CN103292160A (en) * | 2013-06-27 | 2013-09-11 | 陕西师范大学 | Ultrasonic detection device and method for pipeline leakage |
| CN103629536A (en) * | 2013-11-13 | 2014-03-12 | 常州大学 | Device and method for monitoring natural gas pipeline leakage |
| CN103742794A (en) * | 2014-01-16 | 2014-04-23 | 昆明理工大学 | Simulating device and simulating method for pipeline leakage acoustic emission signals |
| CN104569153A (en) * | 2014-12-31 | 2015-04-29 | 天津大学 | Ship pool experiment system based on PCCP failure early-warning and monitoring signals |
| CN105020591A (en) * | 2015-06-17 | 2015-11-04 | 常州大学 | Leakage detecting and positioning method for urban gas pipeline without excavation |
| CN106958742A (en) * | 2017-03-08 | 2017-07-18 | 武汉理工大学 | The optical fiber grating sensing pipeline health monitoring systems of many reference amounts |
| CN107726051A (en) * | 2017-11-03 | 2018-02-23 | 昆明理工大学 | A kind of pipeline fault intelligent diagnostics device in metallurgical industry |
| CN108488636A (en) * | 2018-01-24 | 2018-09-04 | 天津大学 | A kind of detecting system applied to shoal buried pipes supersonic sounding and positioning |
| CN109114436A (en) * | 2018-09-13 | 2019-01-01 | 大连理工大学 | Line clogging detection system based on low-frequency sound wave |
| CN109613120A (en) * | 2018-12-11 | 2019-04-12 | 中国航空工业集团公司基础技术研究院 | A kind of active scan receiving type high-resolution pulse ultrasound-acoustic emission detection method |
| CN109931983A (en) * | 2019-03-22 | 2019-06-25 | 太仓濂辉液压器材有限公司 | A kind of pressurization tubing pressure detection technique of recyclable high intensity long life |
| CN110319357A (en) * | 2018-03-30 | 2019-10-11 | 中国科学院声学研究所 | A kind of gas pipe leakage detection positioning system and method injected using sound |
| CN110864227A (en) * | 2019-11-01 | 2020-03-06 | 清华大学 | Water supply pipe network state monitoring system and method |
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2008
- 2008-03-05 CN CNA2008100523723A patent/CN101240874A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537671A (en) * | 2012-03-07 | 2012-07-04 | 张钧 | Sensor module for monitoring leakage of natural gas transmission pipeline |
| CN103258577A (en) * | 2013-04-16 | 2013-08-21 | 中国核电工程有限公司 | Method for break simulation in high energy pipe leakage monitoring experiment of nuclear power station |
| CN103258577B (en) * | 2013-04-16 | 2016-02-03 | 中国核电工程有限公司 | Nuclear power station high energy line leakage test cut analogy method |
| CN103292160A (en) * | 2013-06-27 | 2013-09-11 | 陕西师范大学 | Ultrasonic detection device and method for pipeline leakage |
| CN103292160B (en) * | 2013-06-27 | 2015-11-18 | 陕西师范大学 | The ultrasonic detection device of pipe leakage and method |
| CN103629536A (en) * | 2013-11-13 | 2014-03-12 | 常州大学 | Device and method for monitoring natural gas pipeline leakage |
| CN103629536B (en) * | 2013-11-13 | 2015-10-28 | 常州大学 | A kind of device and method of natural gas line leakage |
| CN103742794A (en) * | 2014-01-16 | 2014-04-23 | 昆明理工大学 | Simulating device and simulating method for pipeline leakage acoustic emission signals |
| CN104569153A (en) * | 2014-12-31 | 2015-04-29 | 天津大学 | Ship pool experiment system based on PCCP failure early-warning and monitoring signals |
| CN105020591B (en) * | 2015-06-17 | 2018-01-02 | 常州大学 | A kind of city gas pipeline does not excavate leakage detecting and locating method |
| CN105020591A (en) * | 2015-06-17 | 2015-11-04 | 常州大学 | Leakage detecting and positioning method for urban gas pipeline without excavation |
| CN106958742A (en) * | 2017-03-08 | 2017-07-18 | 武汉理工大学 | The optical fiber grating sensing pipeline health monitoring systems of many reference amounts |
| CN107726051A (en) * | 2017-11-03 | 2018-02-23 | 昆明理工大学 | A kind of pipeline fault intelligent diagnostics device in metallurgical industry |
| CN108488636A (en) * | 2018-01-24 | 2018-09-04 | 天津大学 | A kind of detecting system applied to shoal buried pipes supersonic sounding and positioning |
| CN110319357A (en) * | 2018-03-30 | 2019-10-11 | 中国科学院声学研究所 | A kind of gas pipe leakage detection positioning system and method injected using sound |
| CN109114436A (en) * | 2018-09-13 | 2019-01-01 | 大连理工大学 | Line clogging detection system based on low-frequency sound wave |
| CN109613120A (en) * | 2018-12-11 | 2019-04-12 | 中国航空工业集团公司基础技术研究院 | A kind of active scan receiving type high-resolution pulse ultrasound-acoustic emission detection method |
| CN109613120B (en) * | 2018-12-11 | 2021-05-07 | 中国航空工业集团公司基础技术研究院 | Active scanning receiving type high-resolution pulse ultrasonic-acoustic emission detection method |
| CN109931983A (en) * | 2019-03-22 | 2019-06-25 | 太仓濂辉液压器材有限公司 | A kind of pressurization tubing pressure detection technique of recyclable high intensity long life |
| CN110864227A (en) * | 2019-11-01 | 2020-03-06 | 清华大学 | Water supply pipe network state monitoring system and method |
| CN110864227B (en) * | 2019-11-01 | 2020-12-29 | 清华大学 | Water supply pipe network state monitoring system and method |
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