Adjoint matrix-based water supply pipe network leakage fault reverse souring method

Abstract

The invention relates to an adjoint matrix-based water supply pipe network leakage fault reverse sourcing method. The method is characterized by comprising the following steps of: establishing a pipe network flow field transient equation; constructing a sensitivity function on the basis of pressure wave influences formed on a flow field by pipe network leakage; deriving an intensity of pressure according to the sensitivity function, and carrying out reverse processing in the aspects of space and time on an adjoint equation; and carrying out analog simulation by applying MATLAB, verifying an obtained analytical solution and determining a final reverse sourcing model. According to the method provided by the invention, a judging model for detecting a leakage position is obtained through deriving the intensity of pressure P, a function and a displacement x; a time for detecting the leakage position or a leakage position is set through MATLAB simulation, so that a corresponding leakage position or detection time is found; and finally, the leakage positioning in the aspects of time and space is realized. The method has the advantages of being scientific, reasonable, high in sourcing speed, and high in practical value.

Description

technical field [0001] The invention relates to pipelines, and is a reverse source-finding method for water supply pipeline network leakage faults based on an adjoint matrix, which is applied to source-finding of water supply pipeline network leakage, solution of flow field reverse transient parameters, and mechanism analysis of pipeline pressure distribution. Background technique [0002] The leakage of pipe network not only wastes precious water resources, but also increases the cost of water supply equipment, which brings huge economic losses to water supply enterprises and pollutes the surrounding environment. Taking active and effective measures to control the generalized pollution of pipe networks has become a key research issue in my country's water supply industry in the 21st century. [0003] The detection and diagnosis equipment of the existing water supply network cannot achieve a good balance between detection accuracy and equipment investment and maintenance cos...

AI Technical Summary

Problems solved by technology

However, most of the existing reverse detection methods rely on a single detection signal, which is greatly affected by the sensor and detection quality, and it is only a simple signal analysis and processing, and does not start from the modeling and solution of the flow field. The conclusions obtained are not It has universal applicability, but it is more severely restricted by conditions

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