光纤光栅分布式传感系统及其输气管道泄漏检测

Distribated fier bragg grating sensor system and gas pipeline leak latection

针对传统方法难以精确诊断输气管道泄漏的难题,提出采用分布式光纤光栅(FBG)传感技术实现天然气管道泄漏的在线监测技术。利用光纤光栅温度传感器和分布式光纤温度传感器的温度特性,结合天然气管道泄漏处的温度场变化规律,进行了光纤光栅分布式检测系统和分布式光纤泄漏检测系统研究。着重分析了光纤光栅分布式传感系统的构成及其原理,介绍其具有其它传感系统无法比拟的优越性及应用领域,并初步建立了光纤检测系统实施方案。

This article provided a techniche of using Fiber Bragg Grating （FBG） sensors to mornitor natural gas pipeline leak in real time, which sovled the promblem that traditional methods can＇t diagnose the gas pipeline leak in high precision. It discussed FBG system and distributed optical fiber leak detection system based on their temperature features and the temperature change rules of natural gas pipeline leak.It analysed the principle and structure of FBG system and distributed optical fiber leak detection system, and introduced the advantages of the systems, finally, a project using this techniche was showed.