干涉分布式光纤水下长输气管道泄漏检测系统设计  

Design of Interference Distributed Fiber-Optic Underwater Long Gas Pipeline Leakage Detection System

作　　者：胡正松[1] 杨其华[1] 乔波[1] 

机构地区：[1]中国计量学院质量与安全工程学院,浙江杭州310018

出　　处：《激光与光电子学进展》2012年第7期69-73,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(60902095);科技部质检行业公益性科研专项(201110058);浙江省自然科学基金(Y1090672)资助课题

摘　　要：介绍了一种基于马赫曾德尔和萨尼亚克混合干涉仪原理的分布式光纤干涉测量架构,可实时对管道进行泄漏检测和定位。阐述了该架构的检测原理和泄漏点的定位方法,并利用小波变换算法对采集的泄漏信号进行分析处理。对全长为3.994km的感测光纤进行了管道泄漏检测实验并重复做了10次测试实验。实验结果表明,该系统运行稳定且泄漏检测的最大相对定位误差为1.47%。A new measuring structure based on the principle of Sagnac and Mach-Zehnder mixed distributed fiber-optic interferometer is proposed.The structure can detect pipeline leakage and locate leakage point in real-time.The leakage measuring principle and leakage positioning method for the structure are described,and the wavelet transform algorithm is used to analyze the acquisition of the leakage signals.The pipeline leakage detection experiment is carried out for the length of 3.994 km of the fiber-optic sensor,and the test experiments are repeated 10 times.The experimental results show that the system is stable and the maximum relative positioning error is 1.47%.

关 键 词：测量 干涉法 混合干涉仪 泄漏检测 长输气管道 

分 类 号：TE973[石油与天然气工程—石油机械设备]