传感技术学报2018，Vol.31Issue(1)：158-162,5.DOI:10.3969/j.issn.1004-1699.2018.01.026
面向管道安全监测的R-OTDR分布式光纤测温系统
Distributed Optical Fiber Temperature Measurement System for Pipeline Safety Monitoring Based on R-OTDR
摘要
Abstract
Aiming at the potential leakage and fire issues in long-distance pipeline,a distributed optical fiber tem-perature detection method based on backscattered spontaneous Raman scattering and Optical Time Domain Reflecto-metry( R-OTDR) is proposed for pipeline safety monitoring. The principle of the method in pipeline leakage was the-oretically analyzed,and the R-OTDR distributed optical fiber temperature monitoring system was designed,a method of ensemble averaging in conjunction with wavelet transform was adopted to improve the measurement accuracy while ensuring the real-time performance of the system. The system performance was tested in the lab. The results indicate that with a total length of 10 km of sensing fiber,a temperature measure bound of-25℃～+200℃,a tem-perature accuracy of ±1 ℃,a positioning accuracy of no more than 2 m and a fast response time of less than 3 s have been achieved. At the same time,a simulation experiment is carried out in the pipeline laying site,the result shows that the system can monitor the temperature along the pipeline and accurately locate the fault position,which indicates that the system can meet the leakage and fire monitoring demands.关键词
管道安全监测/分布式光纤传感/自发拉曼散射/光时域反射Key words
pipeline safety monitoring/distributed optical fiber sensing/spontaneous raman scattering/optical time domain reflectometry分类
能源科技引用本文复制引用
佟敬阔,靳宝全,王东,王宇,余辉,白亮..面向管道安全监测的R-OTDR分布式光纤测温系统[J].传感技术学报,2018,31(1):158-162,5.基金项目
项目来源:燃气管网数字化系统开发与示范项目( MQ2014-09) （ MQ2014-09）
低浓度煤层气安全输送泄露检测技术研究项目( 2016012011) （ 2016012011）
拉曼散射提升布里渊光纤传感检测性能研究项目( 201601D021068) （ 201601D021068）
分布式光纤传感检测平台项目( 201605D121028) （ 201605D121028）
