论文部分内容阅读
应用Matlab小波变换对燃气管道泄漏信号进行消噪处理,得到了更为精确的泄漏定位结果。首先阐述了小波变换的原理和步骤,通过实验室模拟油气管道进行燃气管道泄漏模拟试验,运用matlab小波工具箱,对不同小波基以及不同阈值处理后的几种偏差进行比较后选取db8小波基对气体管道进行7尺度分析,结合时延估计的检测定位原理得出泄漏位置坐标。结果证明小波消噪确实提高了管道泄漏的定位精度。
The Matlab wavelet transform is used to denoise the leakage signal of the gas pipeline to obtain a more accurate leak localization result. Firstly, the principle and steps of wavelet transform are expounded. Gas pipeline leakage simulation experiment is carried out by laboratory simulation of oil and gas pipelines. By using matlab wavelet toolbox, several wavelet bases and different deviations after different thresholds are compared, db8 wavelet basis Gas pipeline 7-scale analysis, combined with the time delay estimation of the principle of detection and location to find the location of leakage coordinates. The results show that wavelet denoising does improve the positioning accuracy of pipeline leakage.