20 May 2009 Dynamic evaluation system for interpolation errors in the encoder of high precision
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Abstract
In order to measure dynamic interpolation errors of photoelectric encoder of high precision, the dynamic evaluation system of interpolation errors is introduced. Firstly, the fine Moiré signal of encoder which is collected with the high-speed data gathering card into the computer is treated to equiangular data with the method of linear interpolation. Then, the analysis of harmonic wave with the FFT is processed. Compared with the standard signal, the dynamic interpolation errors of the encoder are calculated. Experimental results show that the precision of the dynamic evaluation system of interpolation errors is ±0.1 %( pitch). The evaluation system is simple, fast, high precision, and can be used in the working field of the encoder.
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Qiu-hua Wan, Qiu-hua Wan, Yong-zhi Wu, Yong-zhi Wu, Chang-hai Zhao, Chang-hai Zhao, Li-hui Liang, Li-hui Liang, Ying Sun, Ying Sun, Yong Jiang, Yong Jiang, } "Dynamic evaluation system for interpolation errors in the encoder of high precision", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 728321 (20 May 2009); doi: 10.1117/12.828693; https://doi.org/10.1117/12.828693
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