化工学报2011，Vol.62Issue(8)：2095-2100,6.DOI:10.3969/j.issn.0438-1157.2011.08.002
基于Hilbert-Huang变换的输气管道泄漏诊断方法
Leak diagnosis of gas transport pipelines based on Hilbert-Huang transform
摘要
Abstract
In this paper, an algorithm for gas pipeline leak detection based on Hilbert-Huang transform is studied. The characteristics of the leaked acoustic signal in frequency domain can be analyzed by computing and comparing the before-and-after fluctuations of the energy of Hilbert marginal spectrum. The method judges whether the leak occurs or not by comparing the Hilbert spectrums of current signal with normal signal in the sensitive frequency band, and then locates leak according to the time difference of the leak acoustics arriving in the upstream and downstream ends. Off-line tests based on real history data of industrial pipeline proved the validity of the method.关键词
声信号/输气管道/泄漏检测/Hilbert-Huang变换Key words
acoustic signal/ gas pipeline/ leak detection/ Hilbert-Huang transform分类
能源科技引用本文复制引用
杨红英,华科,叶昊,王桂增..基于Hilbert-Huang变换的输气管道泄漏诊断方法[J].化工学报,2011,62(8):2095-2100,6.基金项目
国家重点基础研究发展计划项目(2010CB731800) （2010CB731800）
国家自然科学基金项目(60974059,60736026,61021063). （60974059,60736026,61021063）
