CN102588747A - Online leakage monitoring method for pipelines on basis of burst type acoustic signal detection technology - Google Patents
Online leakage monitoring method for pipelines on basis of burst type acoustic signal detection technology Download PDFInfo
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- CN102588747A CN102588747A CN201210078962XA CN201210078962A CN102588747A CN 102588747 A CN102588747 A CN 102588747A CN 201210078962X A CN201210078962X A CN 201210078962XA CN 201210078962 A CN201210078962 A CN 201210078962A CN 102588747 A CN102588747 A CN 102588747A
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Abstract
The invention relates to an online leakage monitoring method for pipelines, particularly for long delivery pipelines. The online leakage monitoring method includes that burst type acoustic signal sensors are mounted on a pipeline; when the pipeline leaks, the burst type acoustic signal sensor nearest to the leakage point can detect burst type acoustic signals instantly; the burst type acoustic signals are respectively transmitted to two digital signal processing devices connected with the burst type acoustic sensors electrically; the two digital signal processing devices record leakage time points, transmit pipeline leakage signals, leakage time points and number information of the digital signal processing devices which record the leakage time points to a master control center through a wireless signal channel; and the master control center calculates the position of the leakage point according to the difference between the leakage time points recorded by the two digital signal processing devices and transmission speed of signals on the pipeline. By the aid of the online leakage monitoring method for the pipelines, the position of leakage points of the pipelines can be monitored online accurately.
Description
Technical field
The present invention relates to the on-line monitoring method that a kind of long distance pipeline leaks.
Background technique
The pressure piping transmission is the important way of transmission such as fluid, the energy.Along with The development in society and economy, the laying scope of various long-distance transport pipes is more and more extensive, is accordingly with it, and the pipe leakage accident also takes place again and again, causes huge threat for people's lives and properties and environment.
At present, the technology that is used for pipeline leakage testing mainly contains pressure difference, difference in flow, sensor special and ultrasonic listening technology, and there is following defective mostly in these detection techniques: the one, the leakage of small aperture is difficult to accurate judgement; The 2nd, can't realize accurate location to the online leakage point of pipeline position; The 3rd, lack real-time; The 4th, maintenance cost is high.Along with the research of acoustic emission technique deepens continuously; The industry research personnel have begun to seek to utilize acoustic emission signal pipe leakage point position to be judged the technological approaches of detection both at home and abroad; But present acoustic emission technique all is to adopt steady acoustic signal behind the pipe leakage as the judgement signal of pipe leakage point position, and this just must carry out perforate on pipeline; With the installation acoustic signal sensor, thereby cause pipeline destroyed and increase the processing cost of bringing because of pipeline tapping; And since the intensity of the steady acoustic signal behind the pipe leakage a little less than, if will realize accurate location, more acoustic signal sense node just must be set, thereby further increase the cost of pipeline leakage testing pipe leakage point.
Summary of the invention
The purpose of this invention is to provide a kind of pipe leakage on-line monitoring method, calculate exactly online differentiation is carried out in pipe leakage point position based on burst type acoustic signal detection technique.
Pipe leakage on-line monitoring method based on burst type acoustic signal detection technique according to the invention is: the burst type acoustic signal sensor is installed on the pipeline; Distance between adjacent two burst type acoustic signal sensors is 1～2 ㎞; Each burst type acoustic signal sensor is electrically connected with digital signal processing device; Each digital signal processing device is numbered; When pipeline took place to leak, the burst type acoustic signal sensor from the nearest leakage point both sides of leakage point detected the pipe leakage burst type acoustic signal of moment, and this burst type acoustic signal is transported to two digital signal processing devices that are electrically connected with it respectively; These two digital signal processing device record leak times; And the DSP digital signal processor number information of pipeline leakage signal, leak time and record leak time being transferred to Master Control Center through wireless channel, Master Control Center is according to the difference value ⊿ t and the transmission speed V of signal on pipeline of the leak time of two digital signal processing devices records; Calculate the position of leakage point by formula L1=(L-V ⊿ t)/2, and on the computer display of Master Control Center, carry out the demonstration of leakage point position; L1 is apart from nearest burst type acoustic signal sensor of leakage point and the distance between the leakage point in the said formula, and L is the distance between two burst type acoustic signal sensors of the nearest leakage point both sides of leakage point.
Described burst type acoustic signal sensor can induction pipe leaks the acoustic signal of moment, and this burst type acoustic signal sensor can directly be fixed on the pipeline, and not be used in mounting holes on the pipeline.
Digital signal processing device mainly is made up of microprocessor, data transmission launcher and power supply; Its function is that signal is handled the transmission with data; It receives the burst type acoustic signal that the burst type acoustic signal sensor transmits; And this burst type acoustic signal handled, the data after will handling then send to Master Control Center.
The present invention adopts the judgement signal of the burst type acoustic signal of pipe leakage moment as pipe leakage point position, can put the position to pipe leakage and carry out online accurately judgement; Because the intensity of the burst type acoustic signal of pipe leakage moment is very strong; So can reduce the quantity of the acoustic signal sense node that is arranged on the pipeline; Thereby reduced the cost of pipeline leakage testing, and can carry out online accurately judgement the pipe leakage point position of small aperture; The present invention uses the burst type acoustic signal sensor, need not on pipeline, to offer the sensor mounting hole, thus can not damage pipeline, and avoided the processing cost brought because of pipeline tapping.
Embodiment
Should be based on pipe leakage on-line monitoring method of burst type acoustic signal detection technique: the burst type acoustic signal sensor is installed on the pipeline, and it be 201120312734.5 the disclosed sensor of technological scheme that this burst type acoustic signal sensor is selected number of patent application for use.Distance between adjacent two burst type acoustic signal sensors is 1 ㎞, each burst type acoustic signal sensor is electrically connected with digital signal processing device, and each digital signal processing device is numbered.When pipeline takes place to leak; Burst type acoustic signal sensor from the nearest leakage point both sides of leakage point detects the pipe leakage burst type acoustic signal of moment; And this burst type acoustic signal is transported to two digital signal processing devices that are electrically connected with it respectively; These two digital signal processing device record leak times (utilizing the GPS time service time); And the DSP digital signal processor number information of pipeline leakage signal information, leak time information and record leak time is transferred to Master Control Center through wireless channel; Master Control Center calculates the position of leakage point by formula L1=(L-V ⊿ t)/2, and on the computer display of Master Control Center, carries out the demonstration of leakage point position according to the difference value ⊿ t and the transmission speed V of signal on pipeline of the leak time of two digital signal processing device records.L1 is apart from nearest burst type acoustic signal sensor of leakage point and the distance between the leakage point in the said formula, and L is the distance between two burst type acoustic signal sensors of the nearest leakage point both sides of leakage point.
Distance between above-mentioned adjacent two burst type acoustic signal sensors also can be 1.5 ㎞ or 2 ㎞, looks the pipeline working environment and confirms.
Claims (1)
1. based on the pipe leakage on-line monitoring method of burst type acoustic signal detection technique; It is characterized in that: the burst type acoustic signal sensor is installed on the pipeline; Distance between adjacent two burst type acoustic signal sensors is 1～2 ㎞; Each burst type acoustic signal sensor is electrically connected with digital signal processing device, each digital signal processing device is numbered, when pipeline takes place to leak; Burst type acoustic signal sensor from the nearest leakage point both sides of leakage point detects the pipe leakage burst type acoustic signal of moment; And this burst type acoustic signal is transported to two digital signal processing devices that are electrically connected with it respectively, these two digital signal processing devices record leak times, and the DSP digital signal processor number information of pipeline leakage signal, leak time and record leak time is transferred to Master Control Center through wireless channel; Master Control Center is according to the difference value ⊿ t of the leak time of two digital signal processing device records; With the transmission speed V of signal on pipeline, calculate the position of leakage point by formula L1=(L-V ⊿ t)/2, and on the computer display of Master Control Center, carry out the demonstration of leakage point position; L1 is apart from nearest burst type acoustic signal sensor of leakage point and the distance between the leakage point in the said formula, and L is the distance between two burst type acoustic signal sensors of the nearest leakage point both sides of leakage point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210078962XA CN102588747A (en) | 2012-03-23 | 2012-03-23 | Online leakage monitoring method for pipelines on basis of burst type acoustic signal detection technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210078962XA CN102588747A (en) | 2012-03-23 | 2012-03-23 | Online leakage monitoring method for pipelines on basis of burst type acoustic signal detection technology |
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| CN102588747A true CN102588747A (en) | 2012-07-18 |
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| CN201210078962XA Pending CN102588747A (en) | 2012-03-23 | 2012-03-23 | Online leakage monitoring method for pipelines on basis of burst type acoustic signal detection technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542261A (en) * | 2013-10-07 | 2014-01-29 | 云南省特种设备安全检测研究院 | Pipeline leakage acoustic emission signal processing method based on compressed sensing and HHT in mask signal method |
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| JPS5517737A (en) * | 1978-07-24 | 1980-02-07 | Nippon Kokan Kk <Nkk> | Method of detecting leakage in pipeline for transporting liquid |
| CN85106182A (en) * | 1985-08-16 | 1987-03-04 | 巴布科克和威尔科斯公司 | The sound detection and the equipment thereof of gas in the confined space |
| CN101551064A (en) * | 2009-05-22 | 2009-10-07 | 重庆大学 | Water supply pipe leakage detection locating signal processing method |
| CN101684894A (en) * | 2008-09-27 | 2010-03-31 | 中国石油天然气股份有限公司 | Method and device for monitoring pipeline leakage |
| CN201526809U (en) * | 2009-10-30 | 2010-07-14 | 沈阳工业大学 | Natural gas pipeline leakage monitoring and positioning device based on internal audition |
| RU2432558C1 (en) * | 2010-04-09 | 2011-10-27 | Виктор Сергеевич Аносов | Device for searching for leakage points in main pipelines |
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2012
- 2012-03-23 CN CN201210078962XA patent/CN102588747A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517737A (en) * | 1978-07-24 | 1980-02-07 | Nippon Kokan Kk <Nkk> | Method of detecting leakage in pipeline for transporting liquid |
| CN85106182A (en) * | 1985-08-16 | 1987-03-04 | 巴布科克和威尔科斯公司 | The sound detection and the equipment thereof of gas in the confined space |
| CN101684894A (en) * | 2008-09-27 | 2010-03-31 | 中国石油天然气股份有限公司 | Method and device for monitoring pipeline leakage |
| CN101551064A (en) * | 2009-05-22 | 2009-10-07 | 重庆大学 | Water supply pipe leakage detection locating signal processing method |
| CN201526809U (en) * | 2009-10-30 | 2010-07-14 | 沈阳工业大学 | Natural gas pipeline leakage monitoring and positioning device based on internal audition |
| RU2432558C1 (en) * | 2010-04-09 | 2011-10-27 | Виктор Сергеевич Аносов | Device for searching for leakage points in main pipelines |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542261A (en) * | 2013-10-07 | 2014-01-29 | 云南省特种设备安全检测研究院 | Pipeline leakage acoustic emission signal processing method based on compressed sensing and HHT in mask signal method |
| CN103542261B (en) * | 2013-10-07 | 2016-08-10 | 云南省特种设备安全检测研究院 | Pipeline leakage acoustic emission signals processing method based on compressed sensing and mask signal method HHT |
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Application publication date: 20120718 |