Acoustic emission positioning method of underground gas pipeline leakage point based on Beidou positioning

Abstract

The invention discloses an acoustic emission positioning method of an underground gas pipeline leakage point based on Beidou positioning. The method comprises the following steps: 1, acquiring Beidou coordinates of a sensor based on a Beidou positioning system, and synchronizing time of all acoustic emission sensors; 2, sending the Beidou coordinates of acoustic emission sensors to an upper computer; 3, sending acoustic emission signals of pipelines to the upper computer; 4, recognizing leakage signals through a screening method based on support of vector machine; 5, determining a Beidou coordinate set of the leakage point by utilizing time difference positioning and amplitude attenuation positioning methods; 6, obtaining a Beidou coordinate of the leakage point by means of weighted mean. According to the acoustic emission positioning method disclosed by the invention, the acoustic emission positioning of the leakage point of the gas pipeline and a Beidou positioning system are combined, and the position of the leakage point can be calculated by adopting combination of time difference positioning, amplitude attenuation positioning and weighted mean, so that the accurate positioning of the underground gas pipeline leakage point with small flow can be realized.

Description

technical field [0001] The invention relates to the technical field of gas pipeline leakage monitoring. More specifically, the invention is an acoustic emission positioning method for a buried gas pipeline leakage point based on Beidou positioning. Background technique [0002] Gas is one of the most important energy sources in the world today, and it mainly depends on pipeline transmission. With the improvement of people's living standards, the demand for city gas continues to increase. At the same time, gas pipeline leakage is the main form of gas pipeline failure. Pipeline gas leakage will bring great potential safety hazards. Since the transportation medium of urban buried gas pipeline network has dangerous characteristics such as explosive and flammable, once failure and damage occur, it will often cause huge economic losses and even lead to catastrophic accidents, which will seriously threaten Safety of life and property of the country, enterprises and people. There...

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Problems solved by technology

[0005] In order to solve the problems of resource waste and impact on road traffic and safety in the existing way of locating leakage points through manual inspection, the present invention provides an acoustic emission positioning method for buried gas pipeline leakage points based on Beidou positioning. Not only can it accurately locate the leakage point of the general buried gas pipeline, but also can accurately locate the leakage point of the small-flow urban gas pipeline

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