内嵌预压式大量程光纤光栅智能钢绞线的标定试验  

Calibration Experiment of Large Range Intelligent Steel Strand with FBG Sensor Pre-pressed and Embedded in Groove

作　　者：覃荷瑛 张贺丽[1,2] 沈全喜 朱万旭[1,2] QIN He-ying;ZHANG He-li;SHEN Quan-xi;ZHU Wan-xu(Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering,Guilin 541004, China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004, China)

机构地区：[1]广西岩土力学与工程重点实验室,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《铁道标准设计》2018年第5期76-81,共6页Railway Standard Design

基　　金：国家自然科学基金项目(41272358);广西壮族自治区科技计划项目(桂科AD16380017)

摘　　要：内嵌预压式大量程光纤光栅(fiber Bragg grating,FBG)智能钢绞线解决了光纤光栅传感器监测量程不够的难题。为了保证光纤光栅智能钢绞线的应力应变测量精度,通过理论分析和静载试验标定了智能钢绞线FBG传感器的主要传感性能指标,并对传感器理论和试验应变灵敏度的误差进行分析,试验结果表明FBG传感器的传感性能满足工程要求,试验应变灵敏度Kε不小于1.17 pm/με,迟滞≤1.5%、线性度≤1%、重复性误差≤2.5%,总精度≤3%。The large range intelligent steel strand with FBG sensor prepressing embedded in groove solves the key difficult problem of insufficient FBG sensor monitoring range. In order to ensure the measuring precision of FBG Intelligent steel strand,the main sensing performance indexes of FBG sensor are analyzed and tested by theoretical analysis and experimental calibration. And the differences in theoretical and experimental sensitivity of FBG sensor are analyzed. The test results show that the sensing performance of FBG sensor satisfies the engineering requirements,the test strain sensitivity Kεis not less than 1. 17 pm/με,the hysteresis is ≤1. 5%,the linearity is ≤1%,the repeatability error is ≤ 2. 5%and the total accuracy is ≤3%.

关 键 词：智能钢绞线 光纤光栅传感器 标定试验 传感性能 

分 类 号：TG113.25[金属学及工艺—物理冶金] TU511.32[金属学及工艺—金属学]