An Infrasound Wave Location Method for Leakage Point of Gas Pipe Network Based on EEMD Filtering
If the gas pipe network leaks,due to weak signal,it is often submerged in noisy environment and unable to locat ac-curately.In order to improve the location accuracy,an infrasound wave location method of gas pipe network leakage point is de-signed based on ensemble empirical mode decomposition(EEMD)filtering.The distance of all components is calculated to ob-tain the sampling zero crossing rate of the infrasound wave signal at the leakage point,and transform it into Fourier frames to decompose the time series into several components.The features of the leakage point data of the gas pipe network are extracted based on the EEMD denoising method.Based on the processed data,the leakage point of the gas pipe network can be located,the limiting conditions of the signal frequency can be set at this time,the infrasound location wave error minimization model of the leakage point is established according to different gas pipe network materials.This paper designs the infrasonic wave algo-rithm,and obtains the infrasound location results of the leakage point of the gas pipe network.From the experimental data,under the three materials of steel pipe,PE pipe and PVC pipe,the reduction values of infrasound wave location error of gas pipe network leakage point are 10％,8％and 7％,respectively,which shows that this location method can obtain better loca-tion results.
万方数据
维普
