单相激励电容式时栅角位移传感器研究
Study on capacitive type time-grating angular position sensor with single-phase excitation
高忠华 1胡帅 2汪强 2付敏 3冯济琴3
作者信息
- 1. 重庆理工大学机械工程学院 重庆 400054;重庆理工大学机械检测技术与装备教育部工程研究中心 重庆 400054;重庆理工大学时栅传感及先进检测技术重庆市重点实验室 重庆 400054
- 2. 重庆理工大学机械工程学院 重庆 400054
- 3. 重庆理工大学机械检测技术与装备教育部工程研究中心 重庆 400054
- 折叠
摘要
针对现有多相激励时栅角位移传感器在小体积时无法设置更多极对数进一步提升稳定性,导致精度和动态性能指标无法得到提升等问题,提出一种单相激励电容式时栅角位移测量方法.该方法采用单相激励耦合成四路空间正交的驻波信号,通过电路实现行波构造,从而实现角位移测量.文中介绍了多相激励时栅传感器存在的问题、单相激励时栅的测量原理,完成了传感器样机的研制,并通过实验验证该原理的有效性.实验结果表明,相同尺寸和相同电极数量情况下,单相激励传感器的精度和动态性能指标优于多相激励传感器,单相激励传感器精度为±20″,稳定性为 10″,400 rpm转速下速度波动为±1.25%,跟随误差为±2.5″,满足直驱电机的使用要求.
Abstract
Because of these shortcomings of the existing time-grating angular position sensor with multi-phase excitation,such as the accuracy,stability and dynamic performance improved difficulty in a small volume because of the difficulty of arranging further pole pairs,an angular position measurement method for capacitive type time-grating with single-phase excitation is proposed.In this method,the single-phase excitation is used to couple into four orthogonal signals in the space field,which can be constructed travelling-wave in time and space field simultaneously by a circuit.Then,an angular position measurement can be realized.In this article,these shortcomings of time-grating with multi-phase excitation,the measurement principle of time-grating with single-phase excitation,and the sensor prototype are introduced.The effectiveness of this measurement principle is evaluated by experiments.Experimental results show that the accuracy and dynamic performance of single-phase excitation sensors are better than multiphase excitation sensors with the same size and the same number of electrodes.the prototype accuracy of±20″ and stability of 10″ were obtained.Speed fluctuation of±1.25%and the following error is±2.5″ under 400 rpm can meet the requirements of direct-drive motors.
关键词
电容式时栅/单相激励/多相激励/角位移传感器/行波构造Key words
capacitive type time-grating/single-phase excitation/multi-phase excitation/angular position sensor/traveling-wave construction引用本文复制引用
基金项目
国家自然科学基金(52375526)
重庆市教委重大项目(KJZD-M202201103)
重庆市自然科学基金(cstc2021jcyjmsxmX0512)
出版年
2024
NETL
NSTL
万方数据