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Proceedings Paper

The principle of differential grating displacement sensor
Author(s): Xihou Chen; Donglin Peng; Xinghong Zhang; Xiaokang Liu
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Paper Abstract

Grating type sensor is one of the most important displacement sensors. But the number and the machining precision of their gratings limit the resolution of traditional grating displacement sensor. A new sensor called differential displacement sensor is proposed for the first time. Based on the principle resembling that of vernier calipers, using the scale differential of two staves with relative motion, it can gain more impulses, and achieve the goal of improving resolution. As a new displacement sensor, differential grating displacement sensor has its own characteristic. There are some special factors should be considered and some rules should be followed in designing differential grating sensor. And the parameter choice has a great effect on the performance of the sensor. The design idea, working principle and parameter design rules of differential grating sensor are introduced in details in this paper by making gear grating sensor as an example.

Paper Details

Date Published: 20 February 2006
PDF: 5 pages
Proc. SPIE 6041, ICMIT 2005: Information Systems and Signal Processing, 604127 (20 February 2006); doi: 10.1117/12.664363
Show Author Affiliations
Xihou Chen, Chongqing Univ. (China)
Donglin Peng, Chongqing Institute of Technology (China)
Xinghong Zhang, Chongqing Institute of Technology (China)
Xiaokang Liu, Chongqing Institute of Technology (China)


Published in SPIE Proceedings Vol. 6041:
ICMIT 2005: Information Systems and Signal Processing
Yunlong Wei; Kil To Chong; Takayuki Takahashi, Editor(s)

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