水利水电技术2017，Vol.48Issue(1)：67-71,76,6.DOI:10.13928/j.cnki.wrahe.2017.01.013
基于啁啾布拉格光纤光栅(CFBG)的混凝土磨蚀监测方法
A chirped fiber optic Bragg grating-based concrete abrasion monitoring method
摘要
Abstract
A chirped fiber Bragg grating(FBG)-based concrete abrasion monitoring method is put forward herein,of which the working principle is that the length of the fiber grating can be shortened simultaneously along with the occurrence of concrete abrasion,and then lead the bandwidth of the reflected light spectrum to be narrowed accordingly,thus obtain the depth of the concrete abrasion from the calculation in accordance with the relevant theory of fiber Bragg grating.Simultaneously,a simple algorithm for calculating the depth of the concrete abrasion is described and the testing accuracy of the sensor is verified through the comparative test concerned as well.The test result shows that the measured accuracy of this method can reach to the level of submillimeter for the result of the abrasion measuring on a single point,thus it can be applied to the real-time monitoring of the surface abrasion status of hydraulic structure.关键词
啁啾布拉格光栅光纤/混凝土/磨蚀深度/耦合模理论/传输矩阵法/最小二乘法Key words
chirped fiber optic Bragg grating/concrete/depth of concrete abrasion/coupled mode theory/transfer-matrix method/least square method分类
信息技术与安全科学引用本文复制引用
徐颖,王帅,潘永庆,夏开文..基于啁啾布拉格光纤光栅(CFBG)的混凝土磨蚀监测方法[J].水利水电技术,2017,48(1):67-71,76,6.基金项目
国家重点基础研究发展计划(“973”项目)“高碾压混凝土坝全寿命周期性能演变机理与安全控制”(2013CB035900) （“973”项目）
天津市自然科学基金重点项目(13JCYBJC40600) （13JCYBJC40600）
