A Judgment Method of Gas Pipeline Network Leakage Level Based on Improved Evidence Fusion Algorithm

A technology of evidence fusion and gas pipe, which is applied in the field of level judgment, can solve the problems of influence of synthesis results, unfavorable decision-making, inconsistency of intuition, etc., and achieve the effect of improving the accuracy of discrimination, reliable fusion results, and reducing evidence distortion.
CN110348504BActive Publication Date: 2021-03-23BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2021-03-23

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Abstract

The invention discloses a gas pipeline network leakage level judgment method based on an improved evidence fusion algorithm. The method uses gas pipeline network information measured by sensors to obtain multiple evidence sources for judging gas pipeline network leakage; for weak decision-making evidence, the The weight of the focal element with the highest mass value is set to 1, and the other focal elements are multiplied by their respective focal element weights, thereby effectively expanding the difference between the maximum trust focal element and other focal elements, making the evidence fusion result more reliable and the convergence speed fast. For the conflicting evidence, the average evidence is used to replace the conflicting evidence, and the evidence distance weight is used to limit the conflicting evidence, so as to reduce its influence on the result of evidence synthesis, so that the weak decision-making evidence can play its decision-making role. Using the invention can improve the accuracy of gas pipeline network leakage level decision-making.
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Description

Technical field

[0001] The present invention relates to the field of decision evidence fusion, and more particularly to a method of determining a gas pipeline network leakage based on improved evidence fusion algorithm.Background technique

[0002] The method of fusion can be used for the gas pipeline leak level judgment. This scheme uses the leak information extracted by the pressure and flow of the gas line, and constructs evidence sources; these evidence sources have redundant, complementarity, and conflict, and require effective fusion treatment, thereby improving gas pipe networks. Leak diagnosis accuracy.

[0003] The fusion of the evidence source can be implemented using Dempster-Shafer (DS) evidence theory. The theoretical focus of evidence is to use Dempster synthesis rules to integrate multi-source information and provide decision-making support. Conflict evidence in practical applications is generally existing. When the information is highly conflict, the combined results are often...

Claims

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