Study on capacitive type time-grating angular position sensor with single-phase excitation

被引：0
|
作者：
Gao Z. [1 ,2 ,3 ]
Hu S. [1 ]
Wang Q. [1 ]
Fu M. [2 ]
Feng J. [2 ]
机构：
[1] College of Mechanical Engineering, Chongqing University of Technology, Chongqing
[2] Engineering Research Center of Mechanical Testing Technology and Equipment, Ministry of Education, Chongqing University of Technology, Chongqing
[3] Chongqing Key Laboratory of Time grating Sensing and Advanced Detection Technology, Chongqing University of Technology, Chongqing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2024年 / 45卷 / 01期
关键词：
angular position sensor; capacitive type time-grating; multi-phase excitation; single-phase excitation; traveling-wave construction;
D O I：
10.19650/j.cnki.cjsi.J2312108
中图分类号：
学科分类号：
摘要：
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. © 2024 Science Press. All rights reserved.
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页码：130 / 137
页数：7
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