基于光纤Bragg光栅的古建筑结构健康监测技术研究  

Research of Structure Health Monitoring Technology for Ancient Architecture Based on FBG

作　　者：任小芳[1] 贾栋[2] 赵辉[1] 王高[1] 张志伟[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,仪器科学与动态测试教育部重点实验室,太原030051 [2]中国电信太原分公司,太原030012

出　　处：《传感技术学报》2015年第1期34-38,共5页Chinese Journal of Sensors and Actuators

基　　金：山西省青年科技研究基金(2012021013-5);山西省自然科学基金(2012011010-1)

摘　　要：古建筑具有极其宝贵的历史、文化、艺术和科学研究价值。通过基于3×3耦合器的M-Z干涉解调技术和Lab VIEW相结合的方法,设计了古建筑结构健康监测系统,实现了干涉仪信号的采集、处理、保存、波形显示和变化量的跟踪显示、频谱分析、预警等功能,不仅能够避免光源强度与干涉条纹对比度变化对测量结果的影响,而且操作简单,设备成本低。设计了光纤光栅应变传感实验测试系统性能,结果表明相位变化与应变呈良好的线性关系,测量误差为1.4%。Ancient architecture has the great value of history,culture,art and science research. A structural health monitoring system for ancient architecture was designed,which combined M-Z interferometer demodulation technique based on 3×3 coupler and Lab VIEW. It realizes the functions of data collection from interferometer,processing,storage,waveform display,variation tracking display,spectral analysis and warning. The system can not only avoid the influence of change of light source intensity and interference fringe contrast on the measurement results,but also has the advantages of simple operation,low equipment cost. The experiment of fiber Bragg grating strain sensor was designed to test system performance. The results show a good linear relationship between phase change and strain,the measurement error is 1.4%.

关 键 词：光纤光栅 结构健康监测 古建筑 LabVIEW 对称解调 M-Z干涉仪 应变 

分 类 号：TN212[电子电信—物理电子学] TP311[自动化与计算机技术—计算机软件与理论]