A Novel Contactless Rotary Position Micro-Sensing System Based on Electromagnetism

DOI

10.2991/icacie-17.2017.5How to use a DOI?

Keywords

Absolute angular position sensor; Robot control; Electromagnetic sensor; micro-sensor

Abstract

Based on the law of electromagnetic induction, a novel contactless absolute angular position micro-sensor has been designed in the literature. It is mainly composed of three parts: a magnet having two portions shaped as circle segments with different center points, a Hall effect sensor and a signal processing circuit. The linearity of the sensing system is improved by particularly designing spatial magnetic field distribution of asymmetric magnet, and Hall output signal is converted by the second-order low-pass filter circuit into linear analog voltage. Experiment has been performed on a prototype of the angular position sensor and the results demonstrate the proposed scheme is feasible. Theoretic precision and testing error analysis of the sensor has been pursued at the end of the paper. The proposed sensor has linear characteristics with accuracy below ± 2.5° and linearity with R2 of 0.9992, within the measurement range of 0 to 150°.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Bohan Lv
AU  - Guangshang Zeng
AU  - Shan Liu
AU  - Xiyan Qu
PY  - 2017/08
DA  - 2017/08
TI  - A Novel Contactless Rotary Position Micro-Sensing System Based on Electromagnetism
BT  - Proceedings of the 2017 2nd International Conference on Automatic Control and Information Engineering (ICACIE 2017)
PB  - Atlantis Press
SP  - 21
EP  - 25
SN  - 2352-5401
UR  - https://doi.org/10.2991/icacie-17.2017.5
DO  - 10.2991/icacie-17.2017.5
ID  - Lv2017/08
ER  -