CN102797979A - Device for detecting leakage points of underground pipeline and method thereof - Google Patents
Device for detecting leakage points of underground pipeline and method thereof Download PDFInfo
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- CN102797979A CN102797979A CN2012103114397A CN201210311439A CN102797979A CN 102797979 A CN102797979 A CN 102797979A CN 2012103114397 A CN2012103114397 A CN 2012103114397A CN 201210311439 A CN201210311439 A CN 201210311439A CN 102797979 A CN102797979 A CN 102797979A
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Abstract
The invention provides a device for detecting leakage points of an underground pipeline and the method thereof. The device for detecting leakage points of an underground pipeline comprises a shell and a functional circuit positioned in the shell, wherein the functional circuit comprises a digital signal processor and a differential-type acoustoelectric sensor probe; the digital signal processor is connected with a man-machine control circuit, a display circuit and a peripheral circuit; the differential-type acounstoelectric sensor probe is connected with the digital signal processor through a signal modulating circuit, detects vibrating signals generated by leakage points of the underground pipeline and transmits the signals to the digital signal processor; and after the direction of the leakage points is confirmed, the scope of the leakage points is confirmed step by step by detecting and comparing signal characteristics for a plurality of times. The device for detecting leakage points of an underground pipeline and the method thereof can be used for detecting the leakage points of the underground pipeline under the conditions of not removing covering earth and being not influenced by outside noises and other factors, and conveniently and accurately check the leakage points of the underground water or gas pipeline and the positions of the leakage points by directly detecting the land above the pipeline, and have the advantages of firm structure, stable performance, durability and simplicity in operation.
Description
Technical field
The present invention relates to the acoustoelectric sensor technical field, be specifically related to the device and method of a kind of underground water, the detection of feed channel leakage point based on the coil type acoustoelectric sensor.
Background technique
Underground water, feed channel have obtained using widely in current city infrastructure, in the economic development of country and the people's productive life, occupy position of crucial importance.Yet because its disguise if the situation that pipeline damages, leaks takes place, is difficult in ground observation and arrives, will cause serious waste, the people's productive life caused seriously influence, even can cause potential safety hazard resource.For the serious consequence that pipe leakage will cause, caused the attention of each stratum, thereby " listen and leak the worker " that a group is specialized in underground water, feed channel occurred.It is too high that but this work requires for staff's experience, and the operating time section can only be limited to noise very little late into the night.For above-mentioned situation; Through to the interview of " listen leak worker " and to the careful research of leak point characteristic; The device and method that the underground water of having designed and developed, feed channel leakage point are surveyed; Realized not receiving fast, simply, not excavate under the earthing situation leak point is surveyed under the influence of operating time and ambient noise.
In available research achievements; The detection method of underground water, feed channel leakage point is mainly listened based on simple physics and is leaked rod; Experience and hearing to the staff require too high; And the operating time can only be limited to noise less relatively late into the night, for a long time to staff's ear-drum and healthy impacting; Therefore, it is lower to be necessary to design a kind of cost, does not receive the influence of operating time and ambient noise, and simple and practical detection method, not excavating under the earthing situation, quickly and accurately the leak point is surveyed.
Summary of the invention
The sniffer and the method that the purpose of this invention is to provide a kind of under ground piping leakage point; Do not excavate earthing, do not receive the influence of factors such as ambient noise, through directly the purpose that realizes accurately detecting underground water, feed channel leak point and position thereof being surveyed in soil, top, the pipeline face of land.
The technological scheme that the present invention is adopted for its technical problem of solution is,
The sniffer of under ground piping leakage point; The functional circuit that includes housing and be arranged in housing, this functional circuit includes DSP digital signal processor, and DSP digital signal processor is connected with man-machine control circuit, display circuit and peripheral circuit; Also include differential type acoustoelectric sensor probe; This probe is connected with DSP digital signal processor through signal conditioning circuit, the oscillating signal that probe detection under ground piping leakage point sends, and transmit signals to DSP digital signal processor.
The bottom of probe has metal diaphragm; Its inside has magnet and coil, and metal diaphragm links to each other with coil, and the oscillating signal that under ground piping sends makes metal diaphragm resonance; And the drive coil vibrates in magnetic field; Thereby the generation induced voltage, coil links to each other with signal conditioning circuit through lead, and induced voltage is fed signal conditioning circuit.
Be connected with telescopic feeler on the housing.
Man-machine control circuit is provided with the vibration signals collecting frequency range, comprising: low-frequency range 60～80Hz, Mid Frequency 80～250Hz, high band 250～600Hz.
Signal conditioning circuit is nursed one's health the induced voltage amplitude of coil between 0～3V, and its frequency is remained between 60Hz～250Hz.
Utilize said apparatus to survey the method for under ground piping leakage point, may further comprise the steps:
1) near under ground piping to be measured, places sniffer, probe is attached on the ground, make feeler perpendicular to the ground, gather the signal of low-frequency range, Mid Frequency and high band through man-machine control circuit successively;
2) DSP digital signal processor carries out Treatment Analysis to the signal of three collections, if signal presents following characteristics: three frequency band signals are complete and stable, and the amplitude of the relative medium-high frequency section of the amplitude of low-frequency range is bigger, and then judging near this sensing point has leakage point;
3) move towards along under ground piping; Apart from 100～500 meters of sensing point last time, select a sensing point again, repeating step 1), 2) work; And signal of gathering and the signal of last time compared; Compare increase last time if find the amplitude of low-band signal, explain that then this sensing point is nearer than the sensing point of last time with the distance of leakage point, should continue to carry out forward next time and survey; Reduced relative last time if find the low-band signal amplitude, the distance that this sensing point and leakage point then be described than last time sensing point farther, should be along getting sensing point in the other direction;
4) after definite leakage point direction, only preserve the last signal data of gathering, for comparing repeating step 1 with surveying next time), 2), 3) work, progressively confirm the scope of leakage point.
Under ground piping leaks, when leaking gas, under the effect of water, air pressure, impact, friction tube wall and external agency; Just produce certain sound that leaks, leaks gas, this sound that leaks is made up of three parts: 1. water, gas impact environment for a long time, outside leaking, leaking gas, form the cavity; Constitute a resonant cavity; The amplitude of this place's sound is bigger, and frequency is lower, mainly concentrates between 60～80Hz; 2. water, gas impact tube wall, produce chatter, and its frequency is between 80～250Hz; 3. after water, gas are gone out tube wall, impact environment, produce the sound like clay, sandstone or loess etc., its frequency broad mainly concentrates on 250～600Hz.Based on above-mentioned principle, the man-machine control circuit of sniffer is provided with three and gathers frequency range: low-frequency range 60～80Hz, Mid Frequency 80～250Hz, high band 250～600Hz.
The invention has the advantages that; This sniffer and method have realized not excavating earthing, not receiving pipe leakage point under the situation test geodetic of influence of factors such as ambient noise; Through directly to soil, pipeline top survey can make things convenient for detect underground water accurately, whether feed channel has leak point and leak source position thereof, its sound construction, stable performance; Durable in use, simple to operate.
Description of drawings
Fig. 1 is the system construction drawing of the sniffer that proposes of the present invention;
Fig. 2 is the acoustic-electric sonde configuration schematic representation of this sniffer.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with diagram and specific embodiment, further set forth the present invention.
The functional circuit that the sniffer of the under ground piping leakage point that the present invention proposes includes housing and is arranged in housing; As shown in Figure 1; This functional circuit includes DSP digital signal processor; DSP digital signal processor is connected with man-machine control circuit, display circuit and peripheral circuit, also includes differential type acoustoelectric sensor probe, and this probe is connected with DSP digital signal processor through signal conditioning circuit; The oscillating signal that probe detection under ground piping leakage point sends, and transmit signals to DSP digital signal processor.
As shown in Figure 2, the bottom of probe has metal diaphragm, and its inside has magnet and coil; Metal diaphragm links to each other with coil; The oscillating signal that under ground piping sends makes metal diaphragm resonance, and drives coil and in magnetic field, vibrate, thereby produces induced voltage; Coil links to each other with signal conditioning circuit through lead, and induced voltage is fed signal conditioning circuit.
In addition, for making things convenient for the carrying out of detection operations, be connected with telescopic feeler on the housing, whole installation weight is lighter, is easy to carry.
Man-machine control circuit is provided with the vibration signals collecting frequency range, comprising: low-frequency range 60～80Hz, Mid Frequency 80～250Hz, high band 250～600Hz.Signal conditioning circuit is nursed one's health the induced voltage amplitude of coil between 0～3V, and its frequency is remained between 60Hz～250Hz.
DSP digital signal processor is selected TMS320X281xDSP, and its peripheral circuit provides processor work needed power supply, resets, circuit such as clock.
It is integrated that this device employing data capture, analysing and processing, result show, can reproduce pipeline runnability in real time.
Utilize said apparatus to survey the method for under ground piping leakage point, may further comprise the steps:
1) near under ground piping to be measured, places sniffer, probe is attached on the ground, make feeler perpendicular to the ground, gather the signal of low-frequency range, Mid Frequency and high band through man-machine control circuit successively;
2) DSP digital signal processor carries out Treatment Analysis to the signal of three collections, if signal presents following characteristics: three frequency band signals are complete and stable, and the amplitude of the relative medium-high frequency section of the amplitude of low-frequency range is bigger, and then judging near this sensing point has leakage point;
3) move towards along under ground piping; Apart from 100～500 meters of sensing point last time, select a sensing point again, repeating step 1), 2) work; And signal of gathering and the signal of last time compared; Compare increase last time if find the amplitude of low-band signal, explain that then this sensing point is nearer than the sensing point of last time with the distance of leakage point, should continue to carry out forward next time and survey; Reduced relative last time if find the low-band signal amplitude, the distance that this sensing point and leakage point then be described than last time sensing point farther, should be along getting sensing point in the other direction;
4) after definite leakage point direction, only preserve the last signal data of gathering, for comparing repeating step 1 with surveying next time), 2), 3) work, progressively confirm the scope of leakage point.
If sniffer is placed on the observation hole (like the pipeline that exposes under the well lid) that pipeline is reserved, effect can be better.
This sniffer and method have realized not excavating earthing, not receiving pipe leakage point under the situation test geodetic of influence of factors such as ambient noise; Through directly to soil, pipeline top survey can make things convenient for detect underground water accurately, whether feed channel has leak point and leak source position thereof; Its sound construction; Stable performance, durable in use, simple to operate.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (6)
1. the sniffer of under ground piping leakage point, the functional circuit that includes housing and be arranged in housing, this functional circuit includes DSP digital signal processor; DSP digital signal processor is connected with man-machine control circuit, display circuit and peripheral circuit; It is characterized in that also include differential type acoustoelectric sensor probe, this probe is connected with DSP digital signal processor through signal conditioning circuit; The oscillating signal that probe detection under ground piping leakage point sends, and transmit signals to DSP digital signal processor.
2. the sniffer of under ground piping leakage point according to claim 1 is characterized in that, the bottom of probe has metal diaphragm; Its inside has magnet and coil, and metal diaphragm links to each other with coil, and the oscillating signal that under ground piping sends makes metal diaphragm resonance; And the drive coil vibrates in magnetic field; Thereby the generation induced voltage, coil links to each other with signal conditioning circuit through lead, and induced voltage is fed signal conditioning circuit.
3. the sniffer of under ground piping leakage point according to claim 1 is characterized in that, is connected with telescopic feeler on the housing.
4. the sniffer of under ground piping leakage point according to claim 1 is characterized in that, man-machine control circuit is provided with the vibration signals collecting frequency range, comprising: low-frequency range 60～80Hz, Mid Frequency 80～250Hz, high band 250～600Hz.
5. the sniffer of under ground piping leakage point according to claim 2 is characterized in that, signal conditioning circuit is nursed one's health the induced voltage amplitude of coil between 0～3V, and its frequency is remained between 60Hz～250Hz.
6. utilize the described device of claim 1 to survey the method for under ground piping leakage point, it is characterized in that, may further comprise the steps:
1) near under ground piping to be measured, places sniffer, probe is attached on the ground, make feeler perpendicular to the ground, gather the signal of low-frequency range, Mid Frequency and high band through man-machine control circuit successively;
2) DSP digital signal processor carries out Treatment Analysis to the signal of three collections, if signal presents following characteristics: three frequency band signals are complete and stable, and the amplitude of the relative medium-high frequency section of the amplitude of low-frequency range is bigger, and then judging near this sensing point has leakage point;
3) move towards along under ground piping; Apart from 100～500 meters of sensing point last time, select a sensing point again, repeating step 1), 2) work; And signal of gathering and the signal of last time compared; Compare increase last time if find the amplitude of low-band signal, explain that then this sensing point is nearer than the sensing point of last time with the distance of leakage point, should continue to carry out forward next time and survey; Reduced relative last time if find the low-band signal amplitude, the distance that this sensing point and leakage point then be described than last time sensing point farther, should be along getting sensing point in the other direction;
4) after definite leakage point direction, only preserve the last signal data of gathering, for comparing repeating step 1 with surveying next time), 2), 3) work, progressively confirm the scope of leakage point.
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| CN201210311439.7A CN102797979B (en) | 2012-08-29 | 2012-08-29 | Device for detecting leakage points of underground pipeline and method thereof |
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| CN201210311439.7A CN102797979B (en) | 2012-08-29 | 2012-08-29 | Device for detecting leakage points of underground pipeline and method thereof |
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Cited By (9)
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| CN104570899A (en) * | 2015-01-19 | 2015-04-29 | 广州杰赛科技股份有限公司 | Environmental monitoring device and power supply control method thereof |
| CN104660164A (en) * | 2015-03-09 | 2015-05-27 | 四川蓝讯宝迩电子科技有限公司 | Compact type photovoltaic control cabinet easy to mount |
| CN104677402A (en) * | 2015-03-09 | 2015-06-03 | 四川蓝讯宝迩电子科技有限公司 | Underground pipeline-monitoring sensor mounting box |
| CN104791223A (en) * | 2015-03-23 | 2015-07-22 | 苏州固基电子科技有限公司 | Air valve with pipe leakage detection function |
| CN106641741A (en) * | 2016-12-22 | 2017-05-10 | 江苏晟尔检测仪器有限公司 | Device and method for detecting damaged point of outer wall corrosion-resistant layer of extra-buried deep pipeline |
| CN107461611A (en) * | 2017-08-24 | 2017-12-12 | 南京邮电大学 | The leakage detection method and leak detecting device being combined based on small echo and EMD reconstruct |
| CN108870091A (en) * | 2018-07-19 | 2018-11-23 | 东北大学 | Line leakage system and method based on low-and high-frequency hybrid detection |
| CN109882741A (en) * | 2019-03-15 | 2019-06-14 | 湘潭大学 | A kind of blockage of sewer detection method |
| CN112303502A (en) * | 2020-09-15 | 2021-02-02 | 湖北力程供水管道检测有限公司 | Sound vibration method water leakage detection method |
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| CN2819239Y (en) * | 2005-03-02 | 2006-09-20 | 王明时 | Infrared built-in pipeline detector |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570899A (en) * | 2015-01-19 | 2015-04-29 | 广州杰赛科技股份有限公司 | Environmental monitoring device and power supply control method thereof |
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| CN104660164B (en) * | 2015-03-09 | 2017-07-28 | 陶如意 | The compact photovoltaic switch board being easily installed |
| CN104660164A (en) * | 2015-03-09 | 2015-05-27 | 四川蓝讯宝迩电子科技有限公司 | Compact type photovoltaic control cabinet easy to mount |
| CN104677402A (en) * | 2015-03-09 | 2015-06-03 | 四川蓝讯宝迩电子科技有限公司 | Underground pipeline-monitoring sensor mounting box |
| CN104791223A (en) * | 2015-03-23 | 2015-07-22 | 苏州固基电子科技有限公司 | Air valve with pipe leakage detection function |
| CN106641741A (en) * | 2016-12-22 | 2017-05-10 | 江苏晟尔检测仪器有限公司 | Device and method for detecting damaged point of outer wall corrosion-resistant layer of extra-buried deep pipeline |
| CN106641741B (en) * | 2016-12-22 | 2018-12-07 | 江苏晟尔检测仪器有限公司 | A kind of device and method of the breaking point of the outer wall erosion resistant coating of the super buried depth pipeline of detection |
| CN107461611A (en) * | 2017-08-24 | 2017-12-12 | 南京邮电大学 | The leakage detection method and leak detecting device being combined based on small echo and EMD reconstruct |
| CN107461611B (en) * | 2017-08-24 | 2019-07-09 | 南京邮电大学 | The leakage detection method and leak detecting device combined is reconstructed based on small echo and EMD |
| CN108870091A (en) * | 2018-07-19 | 2018-11-23 | 东北大学 | Line leakage system and method based on low-and high-frequency hybrid detection |
| CN109882741A (en) * | 2019-03-15 | 2019-06-14 | 湘潭大学 | A kind of blockage of sewer detection method |
| CN112303502A (en) * | 2020-09-15 | 2021-02-02 | 湖北力程供水管道检测有限公司 | Sound vibration method water leakage detection method |
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| CN102797979B (en) | 2014-07-02 |
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