光纤光栅传感器在空间网架结构监测中的应用  

The Application of Fiber Grating Sensors in the Monitoring of Spatial Truss Structure

作　　者：李功标[1] 瞿伟廉[1] 刘晖[1] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点试验室,武汉430070

出　　处：《武汉理工大学学报》2007年第2期83-86,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50378074)

摘　　要：介绍了光纤光栅传感器在深圳市民中心屋顶网架结构中的应用情况。在该结构中,需要测量应变的构件有以轴向应变为主的网架杆件和需要测量X、Y方向应变的钢牛腿结构。对后一种结构,提出了一种表面双向粘贴光纤光栅传感器的方法,并分析了相应的应变传感模型。试验和工程应用结果表明,光纤光栅传感器工作正常,提出的方法可行有效。最后,结合工程中的实际情况,分析了单模光纤在应用中较常见的几种损耗特性。The application of fiber Bragg grating （FBG） sensors in the monitoring system of the Shenzhen citizen center roof spatial truss structure was presented. There were two kinds of members need to be measured, including pipes in which axial stress was predominant and steel brackets in which the strains in X-direction and Y-direction were considered. As for the latter, a new method was developed to obtain the strains using FBC- sensors. Two FBG sensors were attached to the outside of the structure together the intersection mode and the strain model was analyzed accordingly. The experimental result and the application showed that the FBG sensors were working properly and the proposed method was valid. Combined with the engineering application, the characteristics of the main optical fiber＇s losses in the system were analyzed.

关 键 词：光纤光栅 结构监测 单模光纤 光纤损耗 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]