光纤光栅传感器在空间网架结构监测中的应用
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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 FBG 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.
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 FBG 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.
引文
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