光纤角度传感器及其非线性补偿技术的研究  

Research on Optical Fiber Angle Sensor and Its Nonlinear Compensation Technology

作　　者：张靖 单长吉 朱豪 Zhang Jing;Shan Changji;Zhu Hao(School of Physics and Information Engineering,Zhaotong University,Zhaotong 657000,Yunnan,China)

机构地区：[1]昭通学院物理与信息工程学院,云南昭通657000

出　　处：《应用激光》2024年第10期170-178,共9页Applied Laser

基　　金：云南省教育厅项目项(2021J0479);云南省科技计划项目(202001AP070046)。

摘　　要：为了解决传统电子类、磁场类角度传感器易受电磁干扰而导致测量数据不准的问题,提出了一种反射式光纤角度传感器,通过反射式光纤测距转换成角度的方式进行角度测量,搭建了以STM32为主控的光纤角度传感器模型,通过记录角度传感器的旋转角度与其输出电压对应关系,绘制出了电压-角度特性曲线。因而传感器受自身机械结构和外界环境的干扰,使得该电压-角度特性曲线非线性误差较高,因此采用最小二乘法来分析光纤角度传感器的非线性误差,通过实验仿真计算出该传感器的非线性误差为16.11%,表明该传感器的非线性误差较高。所以采用查表法对传感器进行非线性补偿,建立非线性补偿模型。实验表明,采用查表法后能将传感器的非线性误差降到8.57%,降低了7.54个百分点。To address the issue of inaccurate measurement data due to electromagnetic interference in traditional electronic and magnetic field angle sensors,this paper introduces a reflective optical fiber angle sensor.The Angle measurement is carried out by converting reflected optical fiber ranging into Angle,and the optical fiber Angle sensor model with STM32as the main control is built.The voltage-angle characteristic curve is drawn by recording the corresponding relationship between the rotation Angle of the Angle sensor and its output voltage.However,due to the interference of the sensor′s mechanical structure and external environment,the nonlinear error of the volt-angle characteristic curve is relatively high.Therefore,the least square method is used to analyze the nonlinear error of the optical fiber Angle sensor.The nonlinear error of the sensor is calculated by the experimental simulation as 16.11%,indicating that the nonlinear error of the sensor is relatively high.So the nonlinear compensation model is established by using table lookup method.The experiment shows that the nonlinear error of the sensor can be reduced to 8.57%and increased by 7.54percentage points by using table lookup method.

关 键 词：光纤角度传感 非线性校正 STM32 最小二乘法 查表法 

分 类 号：O439[机械工程—光学工程]