光纤传感器应变量测的标定系数修正  

Ideal elasto-plastic model for internal strain measurement by fiber optic sensors

作　　者：李广[1] 李庆斌[1] 张文翠[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2001年第11期102-105,共4页Journal of Tsinghua University(Science and Technology)

基　　金：教育部留学归国人员基金项目;清华大学"九八五"项目

摘　　要：为提高埋置式光纤传感器标定系数的精度 ,分析了原有理论模型误差较大的原因 :传感器中起保护作用的涂层是弹塑性材料 ,但在测量理论中采用了线弹性模型。该文采用理想弹塑性模型 ,分别对受拉和受压两种状态建立了相应的理论模型 ,校正了标定系数公式 ,并完成了相应的试验 ,且两者吻合较好。In order to improve the calibration precision of embedded fiber optic sensor, the reason leading to great error of the pre theory is analyzed. The protective layer of the fiber optic sensor actually is a elasto plasticity material, but a linear elastic model was taken in it in the available publication. An ideal elasto plasticity model is developed. Both in uniaxial compression and uniaxial tension are separately developed and the calibration parameter formula is corrected. The comparison between the theoretical and the experimental results indicates a good agreement.

关 键 词：光纤 传感器 应变测量 标定系数 理想弹塑性 混凝土 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]