分布式光纤管道安全检测定位技术研究

Study on the distributed optical fiber sensing technology for pipeline safety detection and location

提出了一种基于Mach-Zehnder光纤干涉仪原理的管道安全检测分布式光纤传感技术,分析了检测系统的组成和工作原理。阐述了检测系统定位结构和方法,采用相关时延估计算法,通过确定两个测试信号的时延可以获得管道沿线所发生事件的位置。理论分析和测试结果表明,该测试技术具有较高的测试灵敏度和定位精度,定位误差小于300 m。

A new distributed optical fiber sensing technology for pipeline safety inspection based on Mach-Zehnder optical fiber interferometer is introduced.The composition and operating principle of the system is specified and the location structure and method is anlayzed.Correlation algorithm is adopted to define the time delay between two measuring signals,thus the location of event along the pipeline could be detected.Theory analysis and experiment result show that the measuring sensitivity and location precision of the measuring system is high and the location error is lower than 300 m.