Study on Fast and Precise Measurement of Three-Dimensional Displacement Using Hall Sensors

Abstract:

Based on permanent magnet (PM), lots of redundant position information can be achieved only by using few sensors. The redundant information is used for not only decoupling multi-dimensional displacement, but also reducing the measurement uncertainty. However, it is difficult to decouple the magnetic intensity and multi-dimensional displacement. On this point, this paper builds the measurement system consisting of hall sensors and a cylindrical PM. Secondly, the mathematical model of magnetic intensity and displacement is established with the help of finite element simulation. Thirdly, three-dimensional measurement algorithm is proposed based on the method of symmetry and linearization. The experiment results demonstrate the measurement system has satisfactory performance. In addition, without complex calculation, the system has the advantage of fast measurement.

• Periodical: Advanced Materials Research (Volumes 694-697)
• Pages: 1034-1038
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.694-697.1034
• Online since: May 2013
• Authors: Yu Ting Sun, Jin Chun Hu, Yu Zhu, Long Min Chen
• Keywords: Decoupling of Multi-Degree-of-Freedom, Displacement Measurement, Hall Sensor, Permanent Magnet

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