光学学报, 2008, 28 (1): 123, 网络出版: 2008-01-29
新型分布式光纤管道泄漏检测技术及定位方法研究
Research on Novel Distributed Optical Fiber Pipeline Leakage Detection Technology and Location Method
光纤光学 萨尼亚克干涉仪 分布式光纤传感器 泄漏检测 管道 fiber optics Sagnac interferometer distributed optical fiber sensor leakage detection pipeline
摘要
介绍了一种基于萨尼亚克(Sagnac)干涉仪的直线型分布式光纤管道泄漏监测系统,实时进行管道泄漏监测和定位。此系统有两条传感光纤,可有效提高管道监测距离。推导了泄漏信号引起的光信号相位变化表达式;分析了该干涉仪应用于泄漏检测的原理及其泄漏源定位方法,并在分别距两传感光纤末端的法拉第旋转镜为3.990 km和4.024 km处进行了泄漏检测实验。管道泄漏实验结果表明,该系统较准确地确定了泄漏源位置且定位误差小于1.05%.
Abstract
An in-line distributed optical fiber sensor array based on Sagnac interferometer is developed, and it is used to monitor and locate leakage for the fluid-filled (or gas-filled) pipelines in real-time. The advantage of the sensor is that it can mcrease monitoring distance by using two sensing fibers. The representation of phase change for optic signal caused by leakage is formulated; the monitor principle and the leakage source location method for the detection system are analyzed. The experiment is carried out at 3.990 km and 4.024 km from Faraday rotator mirror 1 and Faraday rotator mirror 2, respectively. The results verify that the system can realize leakage detection and locate leakage source accurately, and the error is less than 1.05%.
杭利军, 何存富, 吴斌, 蔡栋生, 宋晏蓉. 新型分布式光纤管道泄漏检测技术及定位方法研究[J]. 光学学报, 2008, 28(1): 123. Hang Lijun, He Cunfu, Wu Bin, Cai Dongsheng, Song Yanrong. Research on Novel Distributed Optical Fiber Pipeline Leakage Detection Technology and Location Method[J]. Acta Optica Sinica, 2008, 28(1): 123.
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