Method, device and system for positioning impact source of wall of pressure pipeline

Abstract

The invention provides a method, a device and a system for positioning an impact source of a wall of a pressure pipeline. The method comprises: collecting an acoustic emission signal generated by theimpact of the wall of the pressure pipeline; separating a frequency signal with a specified frequency from the acoustic emission signal to obtain a waveform envelope spectrum of the acoustic emissionsignal; obtaining time differences between a plurality of sub-signals reaching a preset search point on the wall of the pressure pipeline in the acoustic emission signal according to a pre-establishedpressure pipeline measurement model and a pre-calculated propagation velocity of the acoustic emission signal on the wall of the pressure pipeline; and moving the plurality of sub-signals in a time domain according to the time differences, searching the preset search point, and determining the search point where peaks of the plurality of sub-signals are focused as a position of the impact sourceof the wall of the pressure pipeline. According to the method, the device and the system for positioning the impact source of the wall of the pressure pipeline, accuracy of positioning the impact source of wall of the pressure pipe can be improved.

Description

technical field [0001] The invention relates to the field of pipeline fault location, in particular to a method, device and system for locating the impact source of the pressure-bearing pipeline wall. Background technique [0002] Pipeline transportation plays an important role in the national economy, national defense industry production, and people's daily life. Among them, pressure pipelines are widely used for long-distance transportation and deployment of natural gas, oil, water and other easy-flowing substances around the world. Due to the long-term high pressure of the pressure pipeline, with the increase of the age of the pipeline, the pipeline will be aging and severely corroded; at the same time, due to mechanical vibration, pipeline impact and man-made damage, the damage and leakage of the pressure pipeline will cause accidents. If it happens, it will directly cause serious damage to the human living environment, life and property. In the prior art, the acoustic...

AI Technical Summary

Problems solved by technology

Due to the long-term high pressure of the pressure pipeline, with the increase of the age of the pipeline, the pipeline will be aging and severely corroded; at the same time, due to mechanical vibration, pipeline impact and man-made damage, the damage and leakage of the pressure pipeline will cause accidents. If it happens, it will directly cause serious damage to the human living environment, life and property

The existing technology generally uses acoustic emission technology to locate the impact source of the pressure-bearing pipeline, but the positioning accuracy is low, and it is difficult to effectively predict the vulnerable points of the pipeline

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