Gas transmission pipeline leakage detection system and method suitable for multiple state changes

Abstract

The invention discloses a gas transmission pipeline leakage detection system and method suitable for multiple state changes. The gas transmission pipeline leakage detection system and method suitable for the multiple state changes comprise a gas transmission pipeline leakage detection system (system for short) suitable for multiple state changes and a gas transmission pipeline leakage detection method (method for short) suitable for the multiple state changes. The system comprises an input module, a gas transmission pipeline transmission mechanism model, a neural network compensation model, a pipeline system signal collection module, a correction output processing module and an error obtaining module; the method aims at building a gas transmission pipeline mathematical model, obtaining a gas transmission pipeline state-space equation, processing flow signals of the gas transmission pipeline state-space equation, building the RBF neural network and verifying a detection model; the gas transmission pipeline flowing mathematical model and the detection method based on knowledge are combined, tail end loads, the pipeline diameter, pipeline bending, the environment temperature, the gas wave velocity, a compression coefficient, the pipeline hydraulic frictional resistance coefficient and the like are researched, and the gas transmission pipeline leakage is monitored; and a pipeline model is trained, and an accurate model suitable for the pipeline condition changes is obtained.

Description

technical field [0001] The invention relates to a gas transmission pipeline leakage detection system and method adaptable to various state changes, and belongs to the fields of automatic control and leakage detection technology and gas pipeline leakage detection. Background technique [0002] After decades of development, researchers at home and abroad have proposed a variety of pipeline leakage detection and location methods and applied them in engineering practice. The hardware-based method uses sensors of various mechanisms carried or installed on the pipeline to detect and locate leaks, which is the main method of leak detection and location used in the early days. At present, the leak detection and location technology based on monitoring control and data acquisition, which is mainly based on software and combined with software and hardware, has received extensive attention and has gradually become the mainstream of pipeline leak detection technology. [0003] The softw...

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Problems solved by technology

[0009] In summary, most of the gas pipeline leakage detection methods and technologies mentioned above are devices and methods that detect signals through various sensors such as pressure, flow, temperature, and sound waves, and perform signal feature analysis to extract leakage information. Various leakage detection meth

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