基于光纤光栅的高精度压杆式位移传感器  

High-precision and Pressure Rod Type Displacement Sensor Based on Fiber Bragg Grating

作　　者：孙丽[1] 孙欣欣 李闯[1] 王兴业 宋岩升[1] SUN Li;SUN Xinxin;LI Chuang;WANG Xingye;SONG Yansheng(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2021年第5期779-786,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家重点研发计划课题(2017YFC1503103-05);国家自然科学基金项目(52078310);辽宁省“兴辽英才计划”-科技创新领军人才项目(XLYC1902038)。

摘　　要：目的为了实现对结构进行高精度的位移监测,基于光纤光栅传感原理,提出一种高精度压杆式光纤光栅(Fiber Bragg Grating,FBG)位移传感器。方法在传感器的设计中,通过弹簧将结构产生的位移转化成光纤光栅上的应力,引起光纤光栅中心波长的变化。结果通过对传感器进行标定试验及静态特性分析,得出其灵敏度系数为18.14 pm/mm,相关系数达到0.999以上。结论该传感器具有高精度、大量程、温度自补偿和可以进行实时监测等特点,适用于对结构进行长期位移监测。In order to realize the high-precision displacement monitoring of the structure,based on the principle of fiber grating sensing,a high-precision and pressure rod type fiber Bragg grating(FBG)displacement sensor design method was proposed.In the design of the sensor,the displacement generated by the structure was converted into the stress on the fiber grating through the spring,causing the change of the center wavelength of the fiber grating.Through the calibration test and static characteristics analysis of the sensor,it could be concluded that the sensitivity coefficient of the proposed sensor was 18.14 pm/mm,and the correlation coefficient was above 0.999.The sensor has excellent characteristics such as high accuracy,large range,anti-electromagnetic interference,temperature self-compensation and real-time monitoring.It can be used as a reference for the design of fiber grating sensor for structural displacement measurement.

关 键 词：光纤布拉格光栅 光纤传感器 结构健康监测 位移传感器 灵敏度 位移监测 

分 类 号：TU59[建筑科学—建筑技术科学] TN253[电子电信—物理电子学]