摘要
提出了一种基于光纤布拉格光栅(FBG)的增敏型索力传感器。该传感器的基体为圆柱环状弹性体,3组回字梁间隔120°布置在圆环上,6个FBG分3组按顺序粘贴在回字形梁上,同时在传感器基体上粘贴1个FBG进行对比实验。采用有限元分析方法研究弹性体的应变分布特征,用3组FBG波长漂移量的差值作为传感器的输出信号,实现对锚索应力的测量和温度补偿。压力测试结果表明,基体上FBG的输出信号灵敏度为0.75 pm/kN,而回字梁上FBG输出信号的灵敏度为33.53 pm/kN,增敏效果显著且传感器具有良好的线性度和温度补偿能力。
An enhanced cable force sensor based on fiber Bragg grating(FBG)is proposed.The base of the sensor is a cylindrical ringshaped elastic body,three groups of Hui word beams are arranged on the ring at 120°intervals,and 6 FBGs are pasted sequentially on the Hui word beams in three groups.Moreover,an FBG is pasted on the sensor substrate for comparative experiments.Finite element analysis is used to study the strain distribution characteristics of the elastomer,and the difference in the wavelength drift of the three groups of FBG is used as the output signal of the sensor to realize the measurement of anchor cable stress and temperaturecompensation.The pressure test results show that the sensitivity of the output signal of FBG on the matrix is 0.75 pm/kN,while that of the output signal of FBG on the Hui word beam is 33.53 pm/kN.The sensitization effect is remarkable,and the sensor has good linearity and temperaturecompensation ability.
作者
郭永兴
李志雄
Guo Yongxing;Li Zhixiong(Key Laboratory of Metallurgical Equipment and Control Technology,Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Precision Manufacturing Institute,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2023年第5期68-75,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(52075397,51827812)
湖北省自然科学基金创新群体项目(2020CFA033)
山东省重大科技创新工程(2019JZZY020314)
广西重点研发计划(2020AB44003)。
