Development of a new angular displacement sensor based on principle of vernier caliper

Xinghong Zhang; Donglin Peng; Xihou Chen; Xiaokang Liu

doi:10.1117/12.715249

13 October 2006 Development of a new angular displacement sensor based on principle of vernier caliper

Xinghong Zhang, Donglin Peng, Xihou Chen, Xiaokang Liu

Proceedings Volume 6280, Third International Symposium on Precision Mechanical Measurements; 628005 (2006) https://doi.org/10.1117/12.715249
Event: Third International Symposium on Precision Mechanical Measurements, 2006, Urumqi, China

Abstract

In this paper, a new kind of angular high precision displacement based on principle of vernier caliper is proposed. This displacement is sourced from the idea of vernier caliper. The longer arm of vernier caliper with a linear scale and the L-shaped sliding attachment with a vernier are replaced by an inner round part and outer round part with reticle around them. The numbers of reticle around inner part is different from that of outer part. Using the reticle number difference between two parts having relative motion, in the condition of the similar reticle, there exist changes of some physical parameter among the reticles. It can gain more pulse signal. In some cases, the numbers of pulse signal is approximately equal to the product of the two numbers of reticles around inner and outer round parts, which has identical consequence of pulse interpolation or frequency doubling. Through which the goal of improving resolution is achieved. The design idea, the working principle, the signal analysis, the precision analysis and the experiment result of this angular displacement sensor are introduced. The research result shows that thickness, spacing and number of reticles can directly affect the number, amplitude, wave shape, accuracy and other characteristics of the pulse signal. It will play an important rule in improving the traditional grating type angular displacement sensor technology.

Citation Download Citation

Xinghong Zhang, Donglin Peng, Xihou Chen, and Xiaokang Liu "Development of a new angular displacement sensor based on principle of vernier caliper", Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 628005 (13 October 2006); https://doi.org/10.1117/12.715249

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