基于光纤Bragg光栅的测斜仪设计与试验  

Design and experiment of inclinometer based on FBG

作　　者：李俊鑫[1,2] 郎向伟 LI Junxin;LANG Xiangwei(Shenzhen Research and Design Institute,China Academy of Railway Sciences,Shenzhen 518057,China;Shenzhen Engineering Laboratory for Geological Hazard Monitoring,Shenzhen 518057,China)

机构地区：[1]中国铁道科学研究院深圳研究设计院,广东深圳518057 [2]深圳地质灾害监控工程实验室,广东深圳518057

出　　处：《传感器与微系统》2020年第4期86-88,91,共4页Transducer and Microsystem Technologies

基　　金：中国铁道科学研究院基金资助项目(2016YJ155);深圳市战略性新兴产业发展专项资金资助项目(2017003)。

摘　　要：为解决当前边坡深部水平位移监测中存在的监测效率低、测点数量受限等问题,提出将传感器串接在一条传输光纤上形成变形感知阵列的深部位移监测方法,研发了一种基于光纤Bragg光栅(FBG)传感技术的新型固定式测斜仪器。对光纤测斜仪进行实验测试分析其性能表现。标定实验表明:光纤测斜仪具有较好的线性度,角度分辨率可达到0. 015°,并通过室内模拟试验测试分析在不同的变形状况下光纤测斜仪的精确性,测试结果表明与实际变形较为吻合。To solve the problems such as low monitoring efficiency and limited number of measuring points in the current internal displacement monitoring,a monitoring method by connecting in series on a transmission fiber to form deformation sensing array is proposed and a novel inclination measuring instrument based on fiber Bragg grating( FBG) is researched. Laboratory tests are carried out to analyze on performance and the accuracy of the inclinometer under different deformation conditions. The calibration experiment shows that the inclinometer has good linearity,its angular resolution is 0. 015°. The simulation test result indicates that the measurement of inclinometer is in good agreement with the actual deformation.

关 键 词：光纤Bragg光栅(FBG) 测斜仪 边坡 变形监测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] X924.2[自动化与计算机技术—控制科学与工程]