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Pipeline leakage detection positioning method based on coupling of negative pressure wave and harmonic attenuation method

A technology for harmonic attenuation and pipeline leakage, which is applied in pipeline systems, gas/liquid distribution and storage, and special data processing applications, etc. It can solve problems such as life impact, pipeline leakage economy, and losses, and achieve high feasibility and precise positioning Effect

Pending Publication Date: 2022-02-08
FUZHOU UNIV
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Problems solved by technology

Pipeline leakage will not only cause huge economic losses, but also cause serious pollution to the natural environment and have a huge impact on human life

Method used

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  • Pipeline leakage detection positioning method based on coupling of negative pressure wave and harmonic attenuation method
  • Pipeline leakage detection positioning method based on coupling of negative pressure wave and harmonic attenuation method
  • Pipeline leakage detection positioning method based on coupling of negative pressure wave and harmonic attenuation method

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Embodiment Construction

[0051] The invention will be further described below with reference to the accompanying drawings and examples.

[0052] Please refer to image 3 The present invention provides a method of detecting positioning based on piping leakage detection based on negative pressure waves and harmonic attenuation method, characterized in that the following steps are included:

[0053] Step S1: The leak is detected by the negative pressure wavefront, and the initial leak position is positioned, and the initial leak piping is separated;

[0054] Step S2: Apply an excitation of the isolated pipe to generate a transient flow, utilizing a dynamic pressure sensor, continuously measured and record the pressure signal in the conduit after applying an excitation;

[0055] Step S3: divide the collected pressure signals from different cycles;

[0056] Step S4: Make a Fourier transform to the signal divided by different cycles, obtain the signal spectrum in each cycle, and extract each harmonic to the inte...

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Abstract

The invention relates to a pipeline leakage detection positioning method based on coupling of negative pressure waves and a harmonic attenuation method. The method comprises the following steps: S1, detecting leakage by using a negative pressure wave method, positioning an initial leakage position, and isolating the initial leakage pipeline position; S2, applying excitation to an isolated pipeline, generating transient flow, and using a dynamic pressure sensor for continuously measuring and recording pressure signals at a position in the pipeline after the excitation is applied; S3, dividing the collected pressure signals into different periods; S4, performing Fourier transform on the signals divided into the different periods to obtain a signal frequency spectrum in each period, extracting intensity of each harmonic wave in the different periods, and then performing exponential fitting to obtain an attenuation rate of each harmonic wave; and S5, according to the attenuation rate of each harmonic wave obtained after the fitting, further performing calculation to obtain a positioning result. According to the invention, positioning of tiny leakage detection is realized, the positioning is accurate, and the feasibility is high.

Description

Technical field [0001] The present invention relates to the field of pipeline leakage detection, and more particularly to a method of detecting positioning based on piping leakage coupling based on negative pressure waves and harmonic attenuation method. Background technique [0002] Pipe transport is the main transportation tool for energy and water supply, but due to natural damage and human damage and human damage, pipelines, pipelines have become a major threat to pipeline transportation. Pipeline leaks will not only cause huge economic losses, but also cause serious pollution in the natural environment, which has a huge impact on human life. Inventive content [0003] In view of this, it is an object of the present invention to provide a method of detecting the positioning of micro leakage based on a piping leakage detection positioning coupled to a negative pressure wave and a harmonic attenuation method, and the positioning is accurate and feasible. [0004] In order to a...

Claims

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Application Information

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IPC IPC(8): F17D5/02G06F17/11G06F17/14
CPCF17D5/02G06F17/11G06F17/142
Inventor 陈爱华胥宗朋彭阳阳张传琦郑金洪
Owner FUZHOU UNIV
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