High precision absolute time-grating angular displacement sensor using time division multiplex access scheme with reflective electrode structure

被引：0
|
作者：
Liu X. [1 ]
Li C. [1 ]
Peng K. [1 ]
Yu Z. [1 ]
Feng J. [1 ]
机构：
[1] Engineering Research Center of Mechanical Testing Technology and Equipment, Ministry of Education, Chongqing University of Technology, Chongqing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2019年 / 40卷 / 11期
关键词：
Absolute-type; Angular displacement sensor; Reflective-type; Time division multiplexing structure; Time grating;
D O I：
10.19650/j.cnki.cjsi.J1905502
中图分类号：
学科分类号：
摘要：
In this paper, a high precision absolute time-grating angular displacement sensor using division multiplex access scheme with reflective electrode structure is designed. Based on the incremental time-grating sensor, the single-pole and multi-pole are combined. The multi-pole is used as the precise measurement component for high precision, and the single-pole is used as the rough measurement component that achieves absolute positioning. The time-division multiplex access scheme with reflective electrode structure is proposed. The rough measurement component and the precise measurement component share a set of reflective electrodes and receiving electrodes. In this way, the structure is more compact and better miniaturization. Meanwhile, the rotor does not need lead wires and has more application scenarios. To eliminate the crosstalk between the rough and the precise measurement components, the excitation signal is added to the precise measurement component and the rough measurement component in different time, and grounding the non-working electrode. A sensor prototype with the 60 mm outer diameter and the 26 mm inner diameter is designed using PCB technology. Through theoretical analysis and structural optimization, experimental results show that the measurement accuracy can achieve ±12". © 2019, Science Press. All right reserved.
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页码：23 / 31
页数：8
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