光纤位移传感技术的建筑物结构参数测量研究  

Research on measurement of building structural parameters based on optical fiber displacement sensing technology

作　　者：李欣刚 张新影 赵利军 LI Xingang;ZHANG Xinying;ZHAO Lijun(Department of Civil Engineering,Hebei Polytechnic Institute,Shijiazhuang 050091,China)

机构地区：[1]河北工程技术学院土木工程学院,石家庄050091

出　　处：《激光杂志》2023年第2期205-209,共5页Laser Journal

基　　金：河北省教育厅科技课题(No.z2015201)。

摘　　要：针对常规方法采集建筑物结构传感信号时,接收的反射信号相位差不明显,导致建筑物结构距离位移、角度位移测量精度较差的问题,设计基于光纤位移传感系统的建筑物结构参数测量方法。将系统的光纤位移传感器,放置在建筑物结构固定端和相对变化端,采集传感区域光纤信号。设置系统调制信号最优频率,保证反射信号相位差变化明显。根据解调的光纤信号相位差,测量建筑物结构内部光纤应变,得到结构参数位移变化量。设置对比实验,分别监测建筑物结构沉降、滑动、倾斜,结果表明,设计方法相比常规方法,降低了距离位移和角度位移测量值误差,提高了测量值与实际位移量的相关性和线性度,充分保证了建筑物结构参数测量精度。Aiming at the problem that the phase difference of the received reflected signal is not obvious when the conventional method collects the building structure sensing signal, resulting in the poor measurement accuracy of the distance displacement and angle displacement of the building structure, a measurement method of building structure parameter based on the optical fiber displacement sensing system is designed. The optical fiber displacement sensor of the system is placed at the fixed end and relative change end of the building structure to collect the optical fiber signal in the sensing area. Set the optimal frequency of the system modulation signal to ensure that the phase difference of the reflected signal changes obviously. According to the phase difference of demodulated optical fiber signal, the optical fiber strain in the building structure is measured, and the displacement variation of structural parameters is obtained.Comparative experiments are set to monitor the settlement, sliding and inclination of building structure respectively.The results show that compared with the conventional method, the designed method reduces the error of distance displacement and angular displacement, improves the correlation and linearity between the measured value and the actual displacement, and fully ensures the measurement accuracy of building structural parameters.

关 键 词：光纤位移传感系统 光纤信号 系统调制频率 相位差 光纤应变 建筑物结构 

分 类 号：TN295[电子电信—物理电子学]