Design of Absolute Magnetic Grid Displacement Sensor Based on Encoding Principle

Ji Zhu Liu; Shuang Hui Hao; Tao Chen

doi:10.4028/www.scientific.net/AMM.88-89.336

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 88-89Design of Absolute Magnetic Grid Displacement...

Design of Absolute Magnetic Grid Displacement Sensor Based on Encoding Principle

Abstract:

A new kind of magnetic grid absolute linear displacement sensor is introduced. The displacement measuring method of two new kinds of magnetic grid sensors for single-row and double-row magnet are also proposed in this paper. The double-row magnet sensor is composed of the look-up table column and encoding column, the look-up table column achieves the calculation of relative displacement within a cycle. Precision of the double-row magnet sensor is analyzed and the resolution can reach 0.75µm. The displacement measurement of single-row magnet is realized by adding Hall group based on the encoding column. The signal is processed according to the voltage curves induced by multi-group of Halls.

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Periodical:

Applied Mechanics and Materials (Volumes 88-89)

Pages:

336-340

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.88-89.336

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Online since:

August 2011

Authors:

Ji Zhu Liu, Shuang Hui Hao, Tao Chen

Keywords:

Displacement Encoding, Magnetic Grid, Permanent Magnet

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