Leak Detection of Gas Pipelines Based on Characteristics of Acoustic Leakage and Interfering Signals

作     者：Lingya Meng Cuiwei Liu Liping Fang Yuxing Li Juntao Fu 

作者机构：College of Information and Control EngineeringChina University of PetroleumQingdaoChina. Provincial Key Laboratory of Oil and Gas Storage and Transportation SafetyUniversity of PetroleumQingdaoChina. China SINOPEC Natural Gas CorporationBeijingChina. 

出 版 物：《Sound & Vibration》 (声音与振动（英文）)

年 卷 期：2019年第53卷第4期

页      面：111-128页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：funded by the National Science Foundation of China(51774313) Shandong Provincial Key R&D Program(2017GSF220007) National Key R&D Program of China(2016YFC0802104) 

主　　题：Leak detection acoustic method signal processing external interference characteristic extraction 

摘      要：When acoustic method is used in leak detection for natural gas pipelines,the external interferences including operation of compressor and valve,pipeline knocking,etc.,should be distinguished with acoustic leakage signals to improve the accuracy and reduce false *** this paper,the technologies of extracting characteristics of acoustic signals were *** acoustic leakage signals and interfering signals were measured by experiments and the characteristics of time-domain,frequency-domain and time-frequency domain were *** main characteristics of time-domain are mean value,root mean square value,kurtosis,skewness and correlation function,*** features in frequency domain were obtained by frequency spectrum analysis and power spectrum density,while time-frequency analysis was accomplished by short time Fourier *** results show that the external interferences can be removed effectively by the characteristics of time domain,frequency domain and time-frequency *** can be drawn that the acoustic leak detection method can be applied to natural gas pipelines and the characteristics can help reduce false alarms and missing alarms.