摘要
针对燃气管道的安全监控和破坏预警问题,介绍了基于相位敏感光时域反射原理的分布式光纤振动检测技术。该技术对于燃气管道的周界振动信号具备精细的定位精度,多点的定位能力和快速的响应时间。实验室内已实现在总长11 km的传感光纤上,约5 km的检测范围,小于10 m的定位精度和高于10 d B的信噪比,当前的振动信号动态响应范围处于100-700 Hz。
The advances in technology of distributed optical fiber vibration detection system based on phase-sensitive optical time domain reflectometry are introduced. These results could provide the aide and reference for the external vibration detection in the case of the real-time intrusion detection and safe operation pre-warning of gas pipeline network. The phase-sensitive optical time domain reflectometry technology has a fine positioning accuracy, multi-point positioning capability and fast response time for the vibration signal. Within a total length of 11 km of sensing fiber, a sensing range of about 5 km, a positioning accuracy of less than 10 m and a signal-to-noise ratio of higher than 10 d B could be currently achieved in the laboratory. The dynamic range has been validated between 100 to700 Hz.
出处
《煤炭技术》
CAS
北大核心
2016年第2期225-227,共3页
Coal Technology
基金
山西省煤基重点科技攻关项目(MQ2014-09)
