Next Article in Journal
Design of an HF-Band RFID System with Multiple Readers and Passive Tags for Indoor Mobile Robot Self-Localization
Next Article in Special Issue
Thermal Image Sensing Model for Robotic Planning and Search
Previous Article in Journal
Integrating a DNA Strand Displacement Reaction with a Whispering Gallery Mode Sensor for Label-Free Mercury (II) Ion Detection
Previous Article in Special Issue
Applying High-Speed Vision Sensing to an Industrial Robot for High-Performance Position Regulation under Uncertainties
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(8), 1196;

A Novel Single-Excitation Capacitive Angular Position Sensor Design

Engineering Research Center for Navigation Technology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
Authors to whom correspondence should be addressed.
Academic Editor: Dan Zhang
Received: 30 June 2016 / Revised: 25 July 2016 / Accepted: 26 July 2016 / Published: 29 July 2016
(This article belongs to the Special Issue Advanced Robotics and Mechatronics Devices)
Full-Text   |   PDF [6766 KB, uploaded 29 July 2016]   |  


This paper presents a high-precision capacitive angular position sensor (CAPS). The CAPS is designed to be excited by a single voltage to eliminate the matching errors of multi-excitations, and it is mainly composed of excitation electrodes, coupling electrodes, petal-form sensitive electrodes and a set of collection electrodes. A sinusoidal voltage is applied on the excitation electrodes, then the voltage couples to the coupling electrodes and sensitive electrodes without contact. The sensitive electrodes together with the set of collection electrodes encode the angular position to amplitude-modulated signals, and in order to increase the scale factor, the sensitive electrodes are patterned in the shape of petal-form sinusoidal circles. By utilizing a resolver demodulation method, the amplitude-modulated signals are digitally decoded to get the angular position. A prototype of the CAPS is fabricated and tested. The measurement results show that the accuracy of the sensor is 0.0036°, the resolution is 0.0009° and the nonlinearity over the full range is 0.008° (after compensation), indicating that the CAPS has great potential to be applied in high-precision applications with a low cost. View Full-Text
Keywords: angular position sensor; capacitance sensitive; single-excitation; sinusoidal circular electrodes; amplitude modulation angular position sensor; capacitance sensitive; single-excitation; sinusoidal circular electrodes; amplitude modulation

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Hou, B.; Zhou, B.; Song, M.; Lin, Z.; Zhang, R. A Novel Single-Excitation Capacitive Angular Position Sensor Design. Sensors 2016, 16, 1196.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top