Precise two-point leakage detection locating method for pressure pipeline

Abstract

The invention discloses a precise two-point leakage detection locating method for a pressure pipeline. According to the method, an acoustic emission leakage detection system and a correlator leakage detection system are utilized to collect a pipeline leakage signal of a same object in a same moment and a same environment. One the one hand, a particle swarm optimization algorithm based on a simulated annealing idea is utilized to conduct blind source separation on the leakage source signal detected by the acoustic emission leakage system and embed the leakage source signal into a memorizer; memory is constructed and applied to simulation of a blind source separation method of annealing particles, frequency dispersion features resulted from leakage in multiple points of the pipeline are eliminated, a much preciser leakage source signal is separated out, and separation time is greatly shortened; in this way, the time consumption for the leakage source signal to reach two sensors on the upstream side and the downstream side is determined; meanwhile, propagation velocity of a leakage sound wave in the pipeline is figured out by utilizing detection data of a correlator; finally, according to a cross-correlation locating algorithm, the location of a leakage source is calculated. The precise two-point leakage location method for the pressure pipeline has the advantages of achieving precise locating of the leakage in the pressure pipeline, and being low in cost and convenient to use and the like.

Description

technical field [0001] The invention belongs to the technical field of pipeline leakage location detection and relates to a precise location method for pressure pipeline two-point leakage detection. Background technique [0002] Pipeline transportation is welcomed and valued by people for its advantages of continuous transportation, convenient transportation and low transportation cost. However, due to the natural aging of equipment, climate and environment, and man-made damage, pipeline leakage occurs from time to time. It not only causes a waste of resources, but also pollutes the environment and even threatens people's lives and properties. Therefore, it has good economic value and social significance to find an effective pipeline leakage detection method and find out the hidden dangers of the pipeline. [0003] For pipeline detection and positioning, many technical methods have been developed at home and abroad. In actual working conditions, when a pipe section leaks,...

AI Technical Summary

Problems solved by technology

However, the traditional acoustic emission location detection cannot meet the requirements for precise location of multi-point leaks. For example, there are two leak points in the pipeline under test. Complex working conditions and environmental noise make it difficult to identify and extract pipeline leakage signals, resulting in low positioning accuracy of the leakage source

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