FBG应变挠度法标定及过程仿真  

Calibration and Process Simulation of FBG Strain Deflection Method

作　　者：侯俊凯 刘冰[1] 崔建军[2] 魏晋和 陈恺 张鹏 李学峰 HOU Jun-kai;LIU Bing;CUI Jian-jun;WEI Jin-he;CHEN Kai;ZHANG Peng;LI Xue-feng(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;National Institute of Metrology,Beijing 100029,China;College of Precision Instrument and Optoelectronic Engineering,Tianjin University,Tianjin 300072,China;GD Power Development Company,Beijing 600795,China)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590 [2]中国计量科学研究院,北京100029 [3]天津大学精密仪器与光电子工程学院,天津300072 [4]国电电力发展股份有限公司,北京600795

出　　处：《计量学报》2021年第11期1472-1481,共10页Acta Metrologica Sinica

基　　金：国家重点研发计划专项(2017YFF0206305);国家自然科学基金(51675497);中国计量科学研究院科研课题(AKYZD1804-1)。

摘　　要：介绍了一种基于挠度分析的等强度悬臂梁FBG传感器应变标定测试方法和装置,研究了FBG传感器应变传递过程中的相关参量的仿真分析方法,精确测量了应变传递过程中的相关参量,并且针对不同载荷下的等强度悬臂梁的表面应变和挠度进行了理论分析和仿真。同时解析了挠度与梁表面应变、FBG传感器应变的关系,给出了标定后FBG传感器的应变灵敏度,并对挠度法测量FBG传感器的标定结果进行了不确定度评定。当包含因子k=2时,FBG传感器应变灵敏度的相对扩展不确定度<0.5%,能够满足高精度的应变测试要求,为高精度FBG传感器的应变标定提供了技术支持。A strain calibration test method and device of equal strength cantilever FBG sensor based on deflection analysis are introduced.The simulation analysis method of related parameters in the strain transfer process of FBG sensor is studied.The relevant parameters in the strain transfer process are accurately measured,and the surface strain and deflection of equal strength cantilever beam under different loads are theoretically analyzed and simulated.At the same time,the relationship between deflection and beam surface strain and FBG sensor strain is analyzed,the strain sensitivity of FBG sensor after calibration is given,and the uncertainty of the calibration result of FBG sensor measured by deflection method is evaluated.When the inclusion factor k = 2,the relative extended uncertainty of strain sensitivity of FBG sensor is less than 0.5%,which can meet the requirements of high-precision strain test,and provides technique support for strain calibration of high-precision FBG sensor.

关 键 词：计量学 应变计量 挠度法 有限元仿真 FBG传感器 

分 类 号：TB93[一般工业技术—计量学]