一种长距离分布式温度应变在线监测系统的设计

Design of a long distance distributed temperature strain on-line monitoring system

本文阐述设计的一种长距离分布式温度应变在线监测系统,该系统采用普通的通信单模光纤作为传输介质和传感元件,依据激光在光纤中的背向散射效应及布里渊散射原理,且采用光时域反射技术,实现实时在线测量光纤的温度应变分布信息及对光纤测量点的精确定位,可实现的分布式测量距离达到一百千米以上。该监测系统与传统监测系统相比,传统监测系统通过将监测装置架设到线路上实现在线监测,而该系统光纤本身即是传感器,具有检测光纤不带电、抗射频和电磁干扰,抗腐蚀、耐高压和能快速多点实时在线测量并定位等优点,将在光纤线路在线监测中得到广泛应用。

this paper designs a kind of long-distance distributed temperature and strain of on-line monitoring system,the system USES ordinary single-mode optical fiber as transmission medium of communication and sensing element,on the basis of laser backscattering effect in the optical fiber and the brillouin scattering principle,and adopts the optical time domain reflection technology,real-time on-line measuring the temperature of the optical fiber strain distribution information and accurate positioning of optical fiber measurement point,which can realize the distributed measuring distance of one hundred kilometers or more.Compared with traditional monitoring system,the monitoring system of traditional monitoring system by monitoring devices set up to realize on-line monitoring on line,and optical fiber itself is the sensor,the system has a detection optical fiber electrically neutral,radio frequency(rf)and electromagnetic interference resistance,corrosion resistance,resistance to high pressure,and can quickly multipoint real-time online measurement and location advantages,will be widely used in optical fiber links online monitoring.