两种双强度悬臂梁压力温度双参量光纤传感结构分析  

Analysis of Two Types of Cantilever Beam Structure of Dual-parameter Sensor for the Measurement of Pressure and Temperature

作　　者：谢海鹤[1,2] 宋一然[1,2] 郑敏敏[1,2] XIE Haihe;SONG Yiran;ZHENG Minmin(Fujian Laser Precision Machining Engineering Technology Research Center, Putian Fujian 351100, China;School of Mechanical & Electrical Engineering, Putian Uiniversity, Putian Fujian 351100, China)

机构地区：[1]福建省激光精密加工工程技术研究中心,福建莆田351100 [2]莆田学院机电工程学院,福建莆田351100

出　　处：《莆田学院学报》2017年第2期33-36,共4页Journal of putian University

基　　金：福建省自然科学基金资助项目(2017J05105);福建省教育厅中青年科研项目(JA15439);莆田学院科技项目(2014056);福建省激光精密加工工程技术研究中心开放课题(2017JKA011)

摘　　要：光纤布拉格光栅(FBG)传感器通常采用普通悬臂梁进行增敏传感,存在温度交叉敏感问题。针对等厚等腰双三角形悬臂梁结构和双厚度等腰三角形悬臂梁结构构成的两种双参量测量设计,采用Ansys和Matlab进行分析,发现等厚等腰双三角形悬臂梁结构在压力影响下不能在其表面产生双强度阶跃应变;双厚度等腰三角形悬臂梁结构在压力作用下其结构表面能产生双强度阶跃应变,温度对结构产生单强度应变影响。根据该特性,建立了解调模型,验证了双厚度等腰三角形悬臂梁结构传感器压力温度双参量检测的可行性。Fiber Bragg Grating(FBG)sensors usually adopt ordinary cantilever beams for sensitization.There area multi-sensitization problem caused by temperature.Ansys and Matlab were used to analyze two kinds of dualparametersensor structure design.One was uniform thickness double-isosceles triangle cantilever beam structure.The other was dual-thickness isosceles triangle cantilever beam structure.The surface strain of first structure wasnon-step dual-intension under pressure.The surface strain of second structure was step dual-intension under pressure,and it was one-intension under temperature changing.Based on this feature,the demodulation model of FBG sensorwith double thickness isosceles triangle cantilever beam structure was build.The double parameters sensor for themeasurement of pressure and temperature was verified of its feasibility.

关 键 词：双强度悬臂梁 双参量传感 光纤 

分 类 号：P204[天文地球—测绘科学与技术] TP212[自动化与计算机技术—检测技术与自动化装置]