摘要
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。
Utlizing Matlab wavelet transform for gas pipeline leakage signal de-noising, this paper gets a more accurate leak localization results. Firstly, set for the principles and steps wavelet transform is introduced. Comparing deviation of several different wavelets and different thresholds processing method using Matlab wavelet toolbox, this article selects db8 wavelets for gas pipelines 7 scale analysis, and obtains the leak location coordinates by detection positioning principle combining with time delay estimation. The results proves that wavelet de-noising really improve the positioning accuracy of pipeline leaks.
出处
《中国特种设备安全》
2016年第6期14-17,83,共5页
China Special Equipment Safety
基金
江苏省科技支撑计划:BE2014625
国家安全生产监督管理总局项目:jiangsu_0003_2016AQ
常州市科技支撑计划:CE20145054
关键词
燃气管道
小波变换
泄漏检测
应用
Gas pipelines Wavelet transform Leak detection Application
