CN105782729A - Automatic leak detection device for fuel gas pipeline - Google Patents
Automatic leak detection device for fuel gas pipeline Download PDFInfo
- Publication number
- CN105782729A CN105782729A CN201610309758.2A CN201610309758A CN105782729A CN 105782729 A CN105782729 A CN 105782729A CN 201610309758 A CN201610309758 A CN 201610309758A CN 105782729 A CN105782729 A CN 105782729A
- Authority
- CN
- China
- Prior art keywords
- circuit
- acoustic signals
- gas pipeline
- fuel gas
- microprocessor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
The invention provides an automatic leak detection device for a fuel gas pipeline. The automatic leak detection device for the fuel gas pipeline comprises an infrared image sensor, a sound sensor, a signal amplifying circuit, an audio processing circuit, a spectrum analyzer and a microprocessor, wherein the infrared image sensor is arranged in the environment where the fuel gas pipeline locates and is used for acquiring an infrared image of the locating environment in real time and sending the infrared image to the microprocessor; the sound sensor is used for acquiring a sound wave signal of a position to be detected; the audio processing circuit inputs an acquired fuel gas leak sound wave signal after being amplified into the spectrum analyzer; the frequency and an amplitude value of the fuel gas leak sound wave signal are acquired through the spectrum analyzer; and the accurate distance from a leak point to a detector is obtained through the frequency and the amplitude value. The automatic leak detection device for the fuel gas pipeline can automatically detect whether fuel gas leaks in the environment or not, can also automatically position the leak point, is low in cost, convenient in use, rapid in speed and convenient in field detection and is accurate and reliable.
Description
Technical field
The present invention relates to Detection Technique of Gas Pipeline field, particularly a kind of gas pipeline automatic leak-checking device.
Background technology
After family's gas pipeline has been arranged, it is necessary to its construction quality is detected, a wherein important Testing index is exactly the sealing of pipeline.At present, the detection method of internal gas pipe sealing is commonly employing mouth and blows or form certain air pressure with inflated rubber ball, then pass through the liquid level change checking barometrical U-shaped water column, judge that whether the sealing of internal gas pipe is qualified.
Above-mentioned this detection method is artificial, and the device of employing is simpler and cruder, it is common to have a disadvantage in that
Detection error is big: manually check the reading of U-shaped water column liquid level, it is easy to error in reading occur；Measurement result also can be caused error by the purity of water；Barometrical reading needs to be corrected according to local temperature, latitude and height above sea level, and trimming process is complicated, it is not easy to obtain force value accurately.
Detection efficiency is low: whole process needs manual record and achieves, and work process is loaded down with trivial details, inquires about inconvenience in the future, causes whole detection work efficiency low.
Further, since whole detection process adopts manual record pressure value, measurement result is easily responsible for the impact of factor by staff, situation falseness record occur, getting by under false pretences, and this situation is once occur, it will leave serious potential safety hazard.
Summary of the invention
For solving above-mentioned technical problem, the invention provides a kind of gas pipeline automatic leak-checking device, it includes infrared image sensor, sound transducer, signal amplification circuit, audio frequency processing circuit, spectrum analyzer and microprocessor；
Described infrared image sensor is located in the environment of gas pipeline place, obtain the infrared image of place environment in real time and send to described microprocessor, when detecting that in described environment, regional area has a fixed difference difference with other regions, the described microprocessor described sound transducer of control, signal amplification circuit, audio frequency processing circuit, spectrum analyzer bring into operation；
Described sound transducer is for obtaining the acoustic signals of position to be detected, described signal amplification circuit includes pre-amplification circuit, bandwidth-limited circuit and secondary amplifying circuit, the acoustic signals of acquisition is carried out voltage amplification by described pre-amplification circuit, described bandwidth-limited circuit is for filtering the noise produced in described acoustic signals except device or circuit in the background noise of gas leakage acoustic signals and circuit, the input of described bandwidth-limited circuit is connected with the outfan of pre-amplification circuit, the described input of secondary amplifying circuit is connected with the outfan of bandwidth-limited circuit；
Described audio frequency processing circuit is by the gas leakage acoustic signals input spectrum analyser after the amplification of acquisition, obtained frequency and the range value of described gas leakage acoustic signals by described spectrum analyzer, and obtain the described leakage point accurate distance apart from described detector by described frequency and range value.
It is preferred that described bandwidth-limited circuit includes a single-chip microcomputer, being provided with gas leakage acoustic signals frequency range in described single-chip microcomputer, described bandwidth-limited circuit filters except the described gas leakage unexpected acoustic signals of acoustic signals frequency range.
It is preferred that described microprocessor is by obtaining the aberration of each pixel of infrared image, when aberration reaches to set threshold value, it is judged that this region and other regions have certain temperature difference.
It is preferred that also include an alarm, described alarm is connected with described microprocessor, and when detecting that in described environment, regional area has a fixed difference difference with other regions, described microprocessor sends alarm signal extremely described microprocessor.
The method have the advantages that
Whether gas pipeline automatic leak-checking device provided by the invention can be automatically performed there being gas leakage to detect in environment, and can be automatically performed the location of leakage point, cost of the present invention is low, easy to use, speed soon, accurately and reliably, be easy to Site Detection.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing that embodiment describes required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The gas pipeline automatic leak-checking device structural representation that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
As it is shown in figure 1, embodiments provide a kind of gas pipeline automatic leak-checking device, it includes infrared image sensor 1, sound transducer 3, signal amplification circuit 4, audio frequency processing circuit 5, spectrum analyzer 6 and microprocessor 2；
Described infrared image sensor 1 is located in the environment of gas pipeline place, obtain the infrared image of place environment in real time and send to described microprocessor 2, when detecting that in described environment, regional area and other regions have a fixed difference difference, described microprocessor 2 controls described sound transducer 3, signal amplification circuit 4, audio frequency processing circuit 5, spectrum analyzer 6 bring into operation；
Described sound transducer 3 is for obtaining the acoustic signals of position to be detected, described signal amplification circuit 4 includes pre-amplification circuit, bandwidth-limited circuit and secondary amplifying circuit, the acoustic signals of acquisition is carried out voltage amplification by described pre-amplification circuit, described bandwidth-limited circuit is for filtering the noise produced in described acoustic signals except device or circuit in the background noise of gas leakage acoustic signals and circuit, the input of described bandwidth-limited circuit is connected with the outfan of pre-amplification circuit, the described input of secondary amplifying circuit is connected with the outfan of bandwidth-limited circuit；
Described audio frequency processing circuit 5 is by the gas leakage acoustic signals input spectrum analyser 6 after the amplification of acquisition, obtained frequency and the range value of described gas leakage acoustic signals by described spectrum analyzer 6, and obtain the described leakage point accurate distance apart from described detector by described frequency and range value.
The described bandwidth-limited circuit that the present embodiment provides includes a single-chip microcomputer, is provided with gas leakage acoustic signals frequency range in described single-chip microcomputer, and described bandwidth-limited circuit filters except the described gas leakage unexpected acoustic signals of acoustic signals frequency range.
Concrete, described microprocessor 2 is by obtaining the aberration of each pixel of infrared image, when aberration reaches to set threshold value, it is judged that this region and other regions have certain temperature difference.
The gas pipeline automatic leak-checking device that the embodiment of the present invention provides also includes an alarm 7, described alarm is connected with described microprocessor, when detecting that in described environment, regional area has a fixed difference difference with other regions, described microprocessor sends alarm signal extremely described microprocessor.
Whether gas pipeline automatic leak-checking device provided by the invention can be automatically performed there being gas leakage to detect in environment, and can be automatically performed the location of leakage point, cost of the present invention is low, easy to use, speed soon, accurately and reliably, be easy to Site Detection.
Present invention disclosed above preferred embodiment is only intended to help to set forth the present invention.Preferred embodiment does not have all of details of detailed descriptionthe, is not intended to the detailed description of the invention that this invention is only described yet.Obviously, the content according to this specification, can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is to explain principles of the invention and practical application better, so that skilled artisan can be best understood by and utilize the present invention.The present invention is limited only by the restriction of claims and four corner thereof and equivalent.
Claims (4)
1. a gas pipeline automatic leak-checking device, it is characterised in that include infrared image sensor, sound transducer, signal amplification circuit, audio frequency processing circuit, spectrum analyzer and microprocessor；
Described infrared image sensor is located in the environment of gas pipeline place, obtain the infrared image of place environment in real time and send to described microprocessor, when detecting that in described environment, regional area has a fixed difference difference with other regions, the described microprocessor described sound transducer of control, signal amplification circuit, audio frequency processing circuit, spectrum analyzer bring into operation；
Described sound transducer is for obtaining the acoustic signals of position to be detected, described signal amplification circuit includes pre-amplification circuit, bandwidth-limited circuit and secondary amplifying circuit, the acoustic signals of acquisition is carried out voltage amplification by described pre-amplification circuit, described bandwidth-limited circuit is for filtering the noise produced in described acoustic signals except device or circuit in the background noise of gas leakage acoustic signals and circuit, the input of described bandwidth-limited circuit is connected with the outfan of pre-amplification circuit, the described input of secondary amplifying circuit is connected with the outfan of bandwidth-limited circuit；
Described audio frequency processing circuit is by the gas leakage acoustic signals input spectrum analyser after the amplification of acquisition, obtained frequency and the range value of described gas leakage acoustic signals by described spectrum analyzer, and obtain the described leakage point accurate distance apart from described detector by described frequency and range value.
2. gas pipeline automatic leak-checking device as claimed in claim 1, it is characterized in that, described bandwidth-limited circuit includes a single-chip microcomputer, being provided with gas leakage acoustic signals frequency range in described single-chip microcomputer, described bandwidth-limited circuit filters except the described gas leakage unexpected acoustic signals of acoustic signals frequency range.
3. gas pipeline automatic leak-checking device as claimed in claim 1, it is characterised in that described microprocessor is by obtaining the aberration of each pixel of infrared image, when aberration reaches to set threshold value, it is judged that this region and other regions have certain temperature difference.
4. gas pipeline automatic leak-checking device as claimed in claim 1, it is characterized in that, also include an alarm, described alarm is connected with described microprocessor, when detecting that in described environment, regional area has a fixed difference difference with other regions, described microprocessor sends alarm signal extremely described microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610309758.2A CN105782729A (en) | 2016-05-10 | 2016-05-10 | Automatic leak detection device for fuel gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610309758.2A CN105782729A (en) | 2016-05-10 | 2016-05-10 | Automatic leak detection device for fuel gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105782729A true CN105782729A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610309758.2A Pending CN105782729A (en) | 2016-05-10 | 2016-05-10 | Automatic leak detection device for fuel gas pipeline |
Country Status (1)
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| CN (1) | CN105782729A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575750A (en) * | 2017-10-27 | 2018-01-12 | 华润电力技术研究院有限公司 | A kind of pipeline leakage detection method and pipeline leakage testing device |
| CN107606493A (en) * | 2017-10-27 | 2018-01-19 | 华润电力技术研究院有限公司 | A kind of pipeline leakage checking system |
| CN108180399A (en) * | 2017-12-30 | 2018-06-19 | 陕西建工安装集团有限公司 | A kind of metal bellows air leakage rate check method |
| WO2018133494A1 (en) * | 2017-01-18 | 2018-07-26 | 中国石油大学(华东) | Method of locating leak based on speed difference |
| CN108361559A (en) * | 2018-02-27 | 2018-08-03 | 中煤科工集团重庆研究院有限公司 | A method of improving mine gas extraction pipe net acoustic emission inspection accuracy rate |
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| JPS58167938A (en) * | 1982-03-30 | 1983-10-04 | Agency Of Ind Science & Technol | Leak detector for pipeline |
| CN101561081A (en) * | 2009-05-18 | 2009-10-21 | 中国地质大学（武汉） | Method for detecting and positioning leakage of oil-gas pipeline by utilizing autonomous navigation robot |
| CN202024097U (en) * | 2011-04-28 | 2011-11-02 | 煤炭科学研究总院重庆研究院 | Gas drainage pipeline ultrasonic leakage detector used in coal mines |
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| CN103206616A (en) * | 2013-03-21 | 2013-07-17 | 上海电机学院 | Power plant pipe network leakage positioning and detecting system and detection method |
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| CN104075121A (en) * | 2014-06-04 | 2014-10-01 | 国家电网公司 | Pipeline steam leakage monitoring device adopting infrared spectrums |
| CN104132248A (en) * | 2014-07-31 | 2014-11-05 | 重庆大学 | Fluid pipeline leak detection and positioning method |
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2016
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Patent Citations (8)
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| JPS58167938A (en) * | 1982-03-30 | 1983-10-04 | Agency Of Ind Science & Technol | Leak detector for pipeline |
| CN101561081A (en) * | 2009-05-18 | 2009-10-21 | 中国地质大学（武汉） | Method for detecting and positioning leakage of oil-gas pipeline by utilizing autonomous navigation robot |
| CN202024097U (en) * | 2011-04-28 | 2011-11-02 | 煤炭科学研究总院重庆研究院 | Gas drainage pipeline ultrasonic leakage detector used in coal mines |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133494A1 (en) * | 2017-01-18 | 2018-07-26 | 中国石油大学(华东) | Method of locating leak based on speed difference |
| CN107575750A (en) * | 2017-10-27 | 2018-01-12 | 华润电力技术研究院有限公司 | A kind of pipeline leakage detection method and pipeline leakage testing device |
| CN107606493A (en) * | 2017-10-27 | 2018-01-19 | 华润电力技术研究院有限公司 | A kind of pipeline leakage checking system |
| CN107606493B (en) * | 2017-10-27 | 2019-06-28 | 华润电力技术研究院有限公司 | A kind of pipeline leakage checking system |
| CN108180399A (en) * | 2017-12-30 | 2018-06-19 | 陕西建工安装集团有限公司 | A kind of metal bellows air leakage rate check method |
| CN108180399B (en) * | 2017-12-30 | 2019-09-10 | 陕西建工安装集团有限公司 | A kind of metal bellows air leakage rate check method |
| CN108361559A (en) * | 2018-02-27 | 2018-08-03 | 中煤科工集团重庆研究院有限公司 | A method of improving mine gas extraction pipe net acoustic emission inspection accuracy rate |
| CN108361559B (en) * | 2018-02-27 | 2019-06-14 | 中煤科工集团重庆研究院有限公司 | A method of improving mine gas extraction pipe net acoustic emission inspection accuracy rate |
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Application publication date: 20160720 |
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