光纤光栅传感技术在成桥检测中的应用研究  

Study on the Application of FBG Sensing Technology in Built Bridge Monitoring

作　　者：信思金[1] 梁磊[1] 左军[1] 

机构地区：[1]武汉理工大学光纤传感技术中心,武汉430070

出　　处：《光学与光电技术》2005年第3期13-16,共4页Optics & Optoelectronic Technology

基　　金：国家863计划重大项目(2002AA313140)资助

摘　　要：在分析的基础上,通过等强度梁试验具体验证了光纤Bragg光栅波长变化与应变的关系,研究了光纤Bragg光栅传感器的布设工艺,并在某大桥的成桥检测过程中成功地布设了36个光纤Bragg光栅应变传感器与5个温度传感器,布设的传感器在成桥检测过程中监测结构层状态。监测结果表明:埋入的光纤Bragg光栅传感器具有很好的传感性能,可以很方便地监测桥梁结构,为桥梁结构的健康诊断提供可靠的依据。The relationship between FBG’s wavelength change and strain is verified through the experiment of equal intensity beam on the basis of analysis. The techniques of FBG sensor layout is explored. 36 FBG strain sensors and 5 FBG temperature sensors are successfully laid during the monitoring of a built bridge, and the structural state of the bridge is monitored by the sensors. The monitoring results show that the strain of the concrete girder can be monitored conveniently with the laid FBG sensors, which have good sensing capabilities and provide their durability and stability for structural health diagnosis.

关 键 词：光纤光栅应变传感器 桥梁监测 应变监测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]