分布式光纤测温在蒸汽管路监测上的应用及滤波  

Application and Filtering of distributed temperature sensor in steam pipeline monitoring

作　　者：蒋思炯 许壮伟 泮恒拓 陈斌 JIANG Sijiong;XU Zhuangwei;PAN Hengtuo;CHEN Bin(Tongxiang Taiaisi Environmental Energy Corporation,Tongxiang 314500,China;Huzhou Institute,Zhejiang University,Huzhou 313000,China)

机构地区：[1]桐乡泰爱斯环保能源有限公司,浙江桐乡314500 [2]浙江大学湖州研究院,浙江湖州313000

出　　处：《光学技术》2023年第3期324-328,共5页Optical Technique

摘　　要：面对热电厂中存在的高温蒸汽管路输送距离长、泄漏点难以寻找的问题,搭建分布式光纤测温系统,对蒸汽管路的温度场进行监控。系统根据拉曼散射原理解调出了管道沿线铺设光缆中反射光信号内含有的温度信息,并根据光时域反射技术将温度与对应的管道进行位置匹配。同时系统通过卡尔曼滤波算法对解调出的温度信号进行了滤波,结果证明卡尔曼滤波能够将系统测量的温度波动降低至1℃。Steam pipeline in thermal power plant is long-distance and high-temperature,so it is difficult to find the leakage point.A distributed temperature sensor system is built to monitor the temperature field of steam pipeline.The system can demodulate the temperature from the reflected light affected by the pipeline temperature according to the Raman principle,and the position of measuring point is confirmed through optical time domain reflection technology.Finally,Kalman algorithm is used to de-noise the temperature signal,the result show that it can reduce the system signal fluctuation to 1℃.

关 键 词：分布式光纤测温 蒸汽管路 监测 卡尔曼滤波 

分 类 号：TH81[机械工程—仪器科学与技术]