基于多模光纤温度不敏感的曲率传感器  

Temperature-insensitive curvature sensor based on multimode fiber

作　　者：毛莉莉[1,2] 张涵 雷婉婷 戴俊宇 潘诗宇 刘理 MAO Lili;ZHANG Han;LEI Wanting;DAI Junyu;PAN Shiyu;LIU Li(Center for Cognitive Science and Transdisciplinary Studies,Jiujiang Univeristy,Jiujiang 332005,China;College of Electronic Information Engineering,Jiujiang Univeristy,Jiujiang 332005,China)

机构地区：[1]九江学院认知科学与跨学科研究中心,江西九江332005 [2]九江学院电子信息工程学院,江西九江332005

出　　处：《传感器与微系统》2023年第8期88-91,共4页Transducer and Microsystem Technologies

基　　金：江西省教育厅科技项目(GJJ161089,GJJ190932);全国高等学校大学生创新创业训练计划项目(202211843003,202311843010)。

摘　　要：提出了一种基于单模—多模—单模(SMS)结构的干涉型高灵敏光纤曲率传感器。从理论上分析了SMS干涉结构的光纤传感原理,实验测试了其传感特性及温度的交叉影响。实验结果表明:对于SMS干涉结构,随着弯曲程度即曲率的增加,特征波长的移动量也增加,向短波长方向漂移,在1.65~1.933 m^(-1)内波长灵敏度高达-58.4 nm/m^(-1),在1.5179~1.622 m^(-1),功率—曲率灵敏度为±355.522 dB/m^(-1)。且温度对曲率的串扰可以忽略不计,提出的光纤曲率传感器可用于结构健康监测等相关领域。An interferometric high sensitive optical fiber curvature sensor based on single mode-multimode-single mode(SMS)structure is proposed.The optical fiber sensing principle of SMS interference structure is analyzed theoretically,and sensing characteristics and cross influence of temperature are tested experimentally.The experimental results show that for SMS interference structure,with the increase of curvature,the movement of characteristic wavelength increases and drifts to short wavelength.The maximum wavelength sensitivity is up to-58.4 nm/m^(-1)in range of 1.65~1.933 m^(-1),and power-curvature sensitivity is±355.522 dB/m^(-1) in range of 1.5179~1.622 m^(-1).Temperature crosstalk on curvature can be neglected.The proposed optical fiber curvature sensor can be used in structural health monitoring and other related fields.

关 键 词：多模干涉 光纤传感器 曲率传感器 单模—多模—单模 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN253[自动化与计算机技术—控制科学与工程]