压力容器2024，Vol.41Issue(2)：72-80,9.DOI:10.3969/j.issn.1001-4837.2024.02.010
基于VMD的广义三次互相关管道泄漏定位检测
Generalized third cross-correlation pipeline leakage location detection based on VMD
摘要
Abstract
Considering the problem of presence of relatively big error with second cross-correlation time delay estimation algorithm in the acoustic location technology for gas pipeline leak detection,a delay estimation algorithm based on variational mode decomposition(VMD)combined with generalized third cross-correlation was proposed.Firstly,VMD algorithm was used to decompose the two signals and reconstruct the signals.Secondly,a correlation was carried out again on the basis of the second cross-correlation,and Hilbert transform(HT)was introduced in the peak detection stage of the cross-correlation algorithm to sharpen the peak value,which becomes a new generalized third cross-correlation delay estimation method.Through the simulation experiment on the data collected by the oil and gas pipeline leakage detection system built for the platform,the accuracy of each algorithm was analyzed.Experimental results show that compared with second cross-correlation,the improved generalized third cross-correlation delay estimation algorithm has significantly improved positioning average accuracy,has higher accuracy and better anti-noise performance,and has a wider application prospect in gas pipeline leakage locating.关键词
管道泄漏检测/变分模态分解/广义三次互相关/希尔伯特变换(HT)Key words
pipe leakage detection/variational mode decomposition(VMD)/generalized third cross-correlation/Hilbert transform(HT)分类
机械制造引用本文复制引用
王冬梅,童影力,何壮,路敬祎..基于VMD的广义三次互相关管道泄漏定位检测[J].压力容器,2024,41(2):72-80,9.基金项目
国家自然科学基金(62103096) （62103096）
海南省自然科学基金(623MS071) （623MS071）
教育部"春晖计划"科研合作项目(HZKY20220314) （HZKY20220314）
