考虑电磁干扰的差动式电容力矩传感器动态校准方法  

Dynamic calibration method of differential capacitive torque sensor considering electromagnetic interference

作　　者：王宽田[1] 覃琴[1] 罗梦霞 梁世华 WANG Kuantian;QIN Qin;LUO Mengxia;LIANG Shihua(Ocean Engineering College,Guilin University of Electronic Technology,Beihai 536000,China;College of Information Science and Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学海洋工程学院,广西北海536000 [2]桂林理工大学信息科学与工程学院,广西桂林541004

出　　处：《中国测试》2024年第8期164-170,共7页China Measurement & Test

基　　金：国家自然科学基金项目(41562018);广西创新驱动发展专项(AA19254016);2021教育部产学合作协同育人项目(202102371052)。

摘　　要：在差动式电容力矩传感器校准过程中,受设备电磁干扰的影响,造成校准结果存在较大偏差。为解决这一问题,在考虑电磁干扰的前提下,提出差动式电容力矩传感器动态校准方法。在差动式电容力矩传感器存在电磁干扰的情况下,采用小波变换方法抑制传感器中的电磁干扰。通过差动式电容力矩传感器的组成结构构建参数化数学模型,获取动态激励和结构响应两者之间的频域传递关系,利用最小二乘法分析传递函数的频域几何关系式,对传感器展开动态解耦和动态补偿。通过冲击剪断装置形成的力矩信号对传感器动态标定,利用检测电路测量阶跃信号对标定结果校准,完成差动式电容力矩传感器动态校准。实验测试结果表明,所提方法可以获取满意的动态校准结果。During the calibration process of differential capacitive torque sensor,the electromagnetic interference of the equipment causes a large deviation in the calibration results.In order to solve this problem,the dynamic calibration method of differential capacitance torque sensor is proposed under the premise of electromagnetic interference.In the case of electromagnetic interference in the differential capacitance torque sensor,the wavelet transform method is used to suppress the electromagnetic interference in the sensor.A parametric mathematical model was built by the structure of the differential capacitance torque sensor,and the frequency domain transfer relationship between the dynamic excitation and the structural response was obtained.The frequency domain geometric relation of the transfer function was analyzed by the least square method,and the dynamic decoupling and compensation of the sensor were developed.The dynamic calibration of differential capacitive torque sensor was completed through the torque signal formed by the impact shear device and the step signal measured by the detection circuit was used to calibrate the calibration results.Experimental results show that the proposed method can obtain satisfactory dynamic calibration results.

关 键 词：电磁干扰抑制 差动式电容力矩传感器 动态校准 动态标定 

分 类 号：TB937[一般工业技术—计量学]