光纤传感器在土木工程健康监测中的发展与应用

摘要

结构健康监测系统的关键因素之一是其系统内部的传感元件.光纤传感器的出现并以其优于其他传感器的特点,已经成为结构健康监测系统的首选传感器.本文将简单综述两类光纤传感器——FBG传感器和基于布里渊散射分布式光纤传感器在土木工程健康监测中的发展和最新的应用状况,并对BOTDR测试系统提出改进方案,以实现对平面分布信息的传感.%The sensing element is one of the key factors in a structural health monitoring.Fiber optic sensor has made it the first choice in Structural Health Monitoring (SHM) system with its unique characteristics compared to the other conventional sensors.In this paper,the development and the latest applications of two kinds of fiber optic sensor are presented briefly,namely Fiber Bragg Grating (FBG) sensor and distributed fiber optic sensors based on Brillouin scattering.An improving proposal for Brillouin Optical Time Domain Reflectometry (BOTDR) testing system is carried out to fulfill the sensing of plane distribution information.