Feature image based gas pipeline network leakage detection and positioning method

Abstract

The invention discloses a feature image based gas pipeline network leakage detection and positioning method. The method comprises the following steps of: 1, selecting all nodes of a gas pipeline network as control points; 2, establishing a gas pipeline network simulation model by employing offline fluid simulation software Pipeline Studio; 3, respectively disposing m equidistant simulation leakage points on pipe sections between adjacent control points of the gas pipeline network simulation model, wherein m is greater than or equal to 2; 4, selecting n equidistant simulation leakage amounts according to gas consumption of the gas pipeline network; 5, respectively inputting the n simulation leakage amounts to the m simulation leakage points, respectively carrying out steady-state simulation on each working condition to obtain control point pressure data of each working condition; 6, making a feature image of leakage working conditions of the gas pipeline network; 7, extracting image feature vectors as detection samples of an SVM (Support Vector Machine); and 8, classifying and identifying the detection samples many times by the SVM. According to the method, a leakage source position can be detected and positioned rapidly and accurately and provides the basis for emergency disposal.

Description

technical field [0001] The invention relates to the technical field of gas pipeline network safety detection, in particular to a gas pipeline network leakage detection and positioning method based on a characteristic image. Background technique [0002] With the acceleration of my country's energy structure adjustment process, the construction of urban gas pipeline network is also developing rapidly. Due to the flammable and explosive characteristics of gas, the safety of pipelines as the main means of gas transportation is particularly important. In various safety production accidents, gas pipeline leakage undoubtedly poses a huge threat to people's life and property safety. While trying to avoid such accidents, we are also required to locate the leakage point as soon as possible and carry out relevant disposal. [0003] At present, most of the domestic and foreign researches on gas pipeline leakage detection and location are aimed at long-distance pipelines for gas and oi...

AI Technical Summary

Problems solved by technology

Coupled with the large urban population and property density, as well as problems such as brutal construction, private excavation and random construction that cause external damage to the gas pipeline, this makes the leakage safety hazards of the urban gas pipeline network more prominent.

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