传感技术学报Issue(7)：1097-1102,6.DOI:10.3969/j.issn.1004-1699.2015.07.026
基于分布式光纤传感的水下输气管道泄漏检测与定位分析
Leak Detection and Localization Analysis of Underwater Gas Pipeline Based on Distributed Fiber Optic Sensing
摘要
Abstract
For underwater gas pipeline leakage point detection and localization,a distributed optical fiber sensor system was proposed based on a hybrid configuration of Sagnac/Mach-Zehnder interferometer. Tiny leakage signals were covered by strong interferences,and optical interferometric signals caused by pipeline leakage can be obtained by the distributed optical fiber system. Wavelet packet is used to deal with interferometric signals,and signals were decomposed into different frequency bands to extract energy features. Those features were clustered with Euclidean distance to discriminate pipeline leakage. The leakage point can be captured from null frequency spectrum. Three leakage localization methods (the traditional detection based on null frequency,the detection of wavelet de-noising and least squares curve fitting process,the proposed method) performances were compared,and the false alarm rate (FAR) is calculated. The experimental results show that the system can identify leakage point accurately. The pro⁃posed method owns the lowest FAR in three methods. Compare to the wavelet de-noising and least squares curve fit⁃ting method,the FAR of proposed method is reduced about 6.6%,and it improves the reliability of leakage detec⁃tion and localization system.关键词
管道泄漏检测与定位/分布式光纤传感/小波包分解/欧氏距离法/虚警率Key words
pipeline leakage detection and localization/distributed optical fiber sensor/wavelet packet decomposi-tion/Euclidean distance method/false alarm rate分类
能源科技引用本文复制引用
韩玲娟,王强,杨其华,范昕炜..基于分布式光纤传感的水下输气管道泄漏检测与定位分析[J].传感技术学报,2015,(7):1097-1102,6.基金项目
国家自然科学基金项目（51374188）；浙江省自然科学基金项目 （）
