Signal interpolation system for linear time grating displacement sensors

Ziran Chen; Xiaokang Liu; Kai Peng

doi:10.1117/12.2211909

26 January 2016 Signal interpolation system for linear time grating displacement sensors

Ziran Chen, Xiaokang Liu, Kai Peng

Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 99031D (2016) https://doi.org/10.1117/12.2211909
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China

Abstract

As regards the problems of using absolute linear time grating sensors as the position detector for full closed-loop CNC system, it is necessary transform temporal information to spatial information with time-space transformation algorithm for absolute linear time grating sensors. Time grating sensor’ signal interpolation model is established with time series. The purpose is to extract the relation mapping between future measurement value and past measurement value. In this way, original absolute displacement signal sampled in equal time interval can be converted to continuous incremental pulses required by full closed-loop CNC system. Furthermore, the predicted error model is proposed to improve the interpolation accuracy. The experiment results prove that the interpolation accuracy can reach 0.65 μm, the resolution can reach 0.1 μm.

Citation Download Citation

Ziran Chen, Xiaokang Liu, and Kai Peng "Signal interpolation system for linear time grating displacement sensors", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99031D (26 January 2016); https://doi.org/10.1117/12.2211909

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