Simulating device and simulating method for pipeline leakage acoustic emission signals

Abstract

The invention relates to a simulating device and a simulating method for pipeline leakage acoustic emission signals, and belongs to the technical field of acoustic emission inspection. One end of a pipeline is sealed, and the other end of the pipeline is connected with the pressurized air charging device. A leakage hole capable of adjusting air leakage quantity is formed in the surface of the pipeline. A waveguide rod with a sensor is mounted on the surface of the pipeline and is away from the air leakage hole by certain distance. One end of the waveguide rod is connected with an acoustic emitter. Leakage acoustic emission signals detected by the simulating device are decomposed by an HHT and then subjected to BP network training to acquire classification results, so that simulation of the pipeline leakage acoustic emission signals is realized. By the simulation method and the simulation device, organization structure and operation mechanism of human brains are simulated in terms of microstructure and function, so that nonlinear systems and uncertain systems can be described well.

Description

technical field [0001] The invention relates to a simulation device and method for an acoustic emission signal of pipeline leakage, belonging to the technical field of acoustic emission detection. Background technique [0002] With the rapid development of the national economy, more and more industrial waste heat boilers appear in industrial production, which brings great convenience to people; at the same time, because industrial waste heat boilers work in extremely harsh environments, the pipeline is very easy to Leakage will seriously affect the safe, reliable, stable and economical operation of production equipment. The traditional monitoring method has a large hysteresis, cannot achieve real-time monitoring, and is increasingly unable to meet the needs of modern production. There is an urgent need to use scientific means to accurately monitor the application technology of early leakage of pipelines. [0003] At present, the real-time monitoring method mainly used in my...

AI Technical Summary

Problems solved by technology

Although this method realizes on-line monitoring and solves the technical problems of other methods to a certain extent, there are still some problems in the sensitivity, effectiveness, reliability and ease of use of monitoring, especially the acoustic noise during boiler operation. The frequency of the acoustic noise generated by the leakage is close to that of the leakage, and it can only be detected when the leakage is strong, and there are many interference signals in it, which are superimposed with the leakage signal generated by the leakage source, which will bring great impact to the subsequent signal processing. Difficulty, often can not achieve the desired effect

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