基于BOTDR分布式传感系统的研究  

Research on BOTDR Distributed Sensing System

作　　者：陈磊[1,2,3] 詹跃东 田庆生[2] CHEN Lei;ZHAN Yue-dong;TIAN Qing-sheng(School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Electric Test & Research Institute Group Co.,Ltd,Kunming 650217,China;Kunming University of Science and Technology's Postgraduate Workstation of Yunnan Power Grid Company,Kunming 650217,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500 [2]云南电力试验研究院(集团)有限公司,云南昆明650217 [3]昆明理工大学云南电网公司研究生工作站,云南昆明650217

出　　处：《仪表技术与传感器》2019年第6期96-100,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(51667012)

摘　　要：为了能够实时监测电力传输线路的温度和应变信息,并监测输电线路的安全状态,设计出30km远程光纤温度应变传感系统。该系统基于光时域反射计(BOTDR)技术的分布式光纤传感技术,采用光学相干拍频的技术方案,利用布里渊激光器作为相干拍频本地光,有效地解决了BOTDR技术方案中存在的微弱信号检测和宽带移频问题。同时提出一种非均匀采样法对采集数据进行处理。搭建了实验系统,并对整个传感系统进行了温度和应变传感测试,测试结果表明:该传感系统传感范围可以达到30km以上,空间分辨率可达到5m以下,温度分辨精度为±1℃,应变分辨精度为±20με。In order to monitor the temperature and strain information of the power transmission line in real time and monitor the safety status of the transmission line,a 30 km long range optical fiber temperature strain sensing system was designed.The sys tem was based on the optical fiber sensor technology of optical time domain reflectometer (BOTDR)technology,using the optical coherent beat technology program,using the developed Brillouin laser as coherent beat local light,the BOTDR technology program in the presence of weak signal detection and broadband frequency shift problem was effectively solved.At the same time,a nonuniform sampling method was proposed to process the collected data.The experimental system was built and the temperature and strain sensing tests were carried out on the whole sensing system.The experimental results show that the sensing range of the sen sor system can reach 30 km,the spatial resolution is 5 m,the temperature resolution is ± 1℃,strain resolution is ± 20με.

关 键 词：光纤传感器 BOTDR 分布式系统 温度传感 应变传感 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]