光纤Bragg光栅应变传感器在桥梁结构监测中的应用  

Application of FBG strain sensors in bridge structure monitoring system

作　　者：张矿伟[1] 张少杰[2] 赵晓霞[1] 王跃飞[1] 陈焰[1] 

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]周口职业技术学院机电工程系,河南周口466000

出　　处：《光学仪器》2014年第1期15-19,共5页Optical Instruments

基　　金：云南省应用基础研究基金项目(KKSA201331004)

摘　　要：为了更准确了解桥梁结构变化情况,提出了一种新的检测方法。采用串联式组网方法,用光纤Bragg光栅(FBG)表面式应变传感器,对大桥左线衬砌裂缝及其长期变形进行监测。对裂缝存在区域的20个监测断面进行近一年的监测结果表明,对温度(测量记录最大温差6.4℃)进行补偿后,光纤Bragg光栅应变传感器的应变在正常范围内,表明在监测期桥梁结构稳定无异常变化。In order to more accurately understand the changes in the bridge structure,a new method of detection was proposed.Fiber Bragg grating （FBG） surface strain sensors were applied in monitoring the lining cracking and the deformation of bridge tunnel left.20 crack sections had been monitored for nearly a year.The monitoring results indicated that after temperature （the maximum measured temperature difference was 6.4 ℃） was compensated,the strain of fiber Bragg grating strain sensor was in the normal range and indicated that the tunnel structure was in a stable and normal condition during the monitoring period.

关 键 词：光纤BRAGG光栅 应变传感器 桥梁监测 

分 类 号：TN247[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]