Method for effectively carrying out blind source analysis by eliminating active signals

Abstract

The invention provides a method for eliminating active signals and effectively performing blind source analysis. The method comprises the following specific steps that a signal acquisition device is used for acquiring a pipeline negative pressure wave signal; a group of negative pressure wave signals in the same time period are analyzed, whether the group of negative pressure wave signals are active signals or not is judged, the negative pressure wave signals which are not the active signals are judged as leakage signals and positioned, the mutual superposition of the flow velocity of a pipeline medium and the sound wave propagation velocity is considered in the positioning calculation, and the leakage positioning accuracy is improved. According to the invention, the problems of low leakage monitoring accuracy, low efficiency, high labor cost and the like caused by many interference signals when negative pressure waves are adopted to monitor the leakage of the gas pipeline in the priorart are solved. The method is widely applied to gas pipeline monitoring.

Description

technical field [0001] The invention relates to the technical field of pipeline leakage monitoring signal screening, in particular to a method for effectively performing blind source analysis by excluding active signals. Background technique [0002] With the development of society, gas is used more and more widely, and more and more accidents are caused by gas leakage. Effective monitoring of gas leakage has become an indispensable link. [0003] If the pipeline leaks, due to the sudden loss of pressure near the leak point, the surrounding gas will be quickly replenished. This replenishment process will arouse an oscillating signal around the leak point, that is, a negative pressure wave signal. Although this signal lasts for a short time, it is the strongest. , capturing and analyzing this signal is the most effective method for leak monitoring. [0004] The moment the pressure regulating device is turned on, a pressure jump signal similar to the negative pressure wave wa...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problems of low leakage monitoring accuracy and efficiency and high labor cost due to many interference signals in the existing process of using negative pressure waves to monitor gas pipeline leakage , to provide a method that can effectively eliminate pipeline interference signals, accurately monitor pipeline leaks and locate leak points, exclude active signals and effectively perform blind source analysis

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