光纤传感测量软体排变形应变传递效率研究  

Research on Strain Transfer Efficiency of Flexible Mattresses Deformation Measurement Using Optical Fiber Sensing

作　　者：魏祥龙 徐伟 左利钦[2] 杨涵苑 王茂枚 袁赛瑜[1] 高杰[1] WEI Xiang-long;XU Wei;ZUO Li-qin;YANG Han-yuan;WANG Mao-mei;YUAN Sai-yu;GAO Jie(The National Key Laboratory of Water Disaster Prevention,Hohai University,Nanjing 210024,Jiangsu Province,China;The National Key Laboratory of Water Disaster Prevention,Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu Province,China;Changjiang Waterway Bureau,Wuhan 430010,Hubei Province,China;Jiangsu Research Institute of Hydraulic Science,Nanjing 210017,Jiangsu Province,China)

机构地区：[1]河海大学水灾害防御全国重点实验室,江苏南京210024 [2]南京水利科学研究院水灾害防御全国重点实验室,江苏南京210029 [3]长江航道局,湖北武汉430010 [4]江苏省水利科学研究院,江苏南京210017

出　　处：《中国农村水利水电》2024年第8期188-193,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金(52309085,U2040219);江苏省自然科学基金(BK20230960);江苏省卓越博士后计划(2023ZB845);江苏省水利科学研究院自主科研经费专项资金项目(2022Z017)。

摘　　要：软体排与传感光纤之间的应变传递效率是应用光纤传感技术监测软体排变形的关键。本文旨在探讨软体排变形时,排体与传感光纤之间的应变传递效率及其对测量准确性的影响。通过理论分析与试验研究表明,在线性拉伸条件下,应变能够高效地从排体传递至光纤,低传递效率线以下的区域主要位于传感光纤的边缘;而在弯曲变形条件下,变形测量误差与相对定点间距R呈线性相关,R=1.2时测量平均误差在-4%以内,而R=2.4~4.8时测量误差范围在-15%~-30%之间。研究成果可为河工模型试验测量技术以及光纤传感监测排体变形的现场应用提供参考。The strain transfer efficiency between flexible mattress and optical fibers is key to monitor the deformation of flexible mattress by applying optical fiber sensing technology.The purpose of this paper is to investigate the strain transfer efficiency between flexible mattresses and optical fiber sensors during deformation of flexible mattresses and its influence on the measurement accuracy.Theoretical analysis and experimental study show that under linear tensile conditions,the strain can be efficiently transferred from the mattress to the optical fibers,and the region below the low transfer efficiency line is mainly located at the edge of the optical fibers;whereas under bending deformation conditions,the deformation measurement error is linearly correlated with the relative fixed-point spacing R,and the average error of the measurements is within-4%when R=1.2,and the range of the measurement error is between-15%and-30%when R=2.4~4.8.The research results of this paper can provide a reference for the measurement technology of river engineering model tests and the field application of optical fiber sensing to monitor the deformation of flexible mattresses.

关 键 词：软体排 应变传递 变形测量 光纤传感 

分 类 号：TV147[水利工程—水力学及河流动力学]