A Multivector Variable Area Type Capacitive Angular Displacement Encoder Based on a Rotating Electric Field and Improvement of Its Demodulation Method

doi:10.1109/jsen.2022.3200099

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	A Multivector Variable Area Type Capacitive Angular Displacement Encoder Based on a Rotating Electric Field and Improvement of Its Demodulation Method
	X. Gao and X. B. Zhang
	2022
发表期刊	Ieee Sensors Journal
ISSN	1530-437X
卷号	22 期号:19 页码:18631-18638
摘要	The problems of the traditional type grating angular displacement encoder make it difficult to balance the measurement performance of miniaturization, high precision and high resolution, and the ability to resist vibration and shock is poor. In this article, a multivector variable-area capacitive angular displacement encoder based on a rotating electric field is proposed. Based on the principle of constructing a rotating electric field, a three-layer transmissive sensing structure with upper and lower layers of electrode plates and a modulation rotor as the middle layer is proposed and designed. A single-channel signal is used as the input excitation signal of the capacitive sensor to avoid the problem of mismatching multiple input signals. A pair of quadrature signals reflecting the spatial angle information is obtained through electric field demodulation and differential processing. The phase demodulation method based on the time scale is further adopted to improve the precision of demodulation. Simulations and experiments show that the sensor has a diameter of 50 mm, a thickness of 5 mm, a resolution of 0.81(ll), an accuracy of 2.5(ll), and a maximum nonlinear error of 40(ll). The design is verified to be feasible, which provides a new solution for capacitive angular position sensor design.
DOI	10.1109/jsen.2022.3200099
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收录类别	sci
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66889
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X. Gao and X. B. Zhang. A Multivector Variable Area Type Capacitive Angular Displacement Encoder Based on a Rotating Electric Field and Improvement of Its Demodulation Method[J]. Ieee Sensors Journal,2022,22(19):18631-18638.
APA	X. Gao and X. B. Zhang.(2022).A Multivector Variable Area Type Capacitive Angular Displacement Encoder Based on a Rotating Electric Field and Improvement of Its Demodulation Method.Ieee Sensors Journal,22(19),18631-18638.
MLA	X. Gao and X. B. Zhang."A Multivector Variable Area Type Capacitive Angular Displacement Encoder Based on a Rotating Electric Field and Improvement of Its Demodulation Method".Ieee Sensors Journal 22.19(2022):18631-18638.

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