Real-time compensation of orthogonality deviation for Moire fringe photoelectric signal

	Real-time compensation of orthogonality deviation for Moire fringe photoelectric signal
	Gao X.; Wan Q.-H.; Zhao C.-H.; Sun Y.; Yang S.-W.
	2014
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	ISBN/1004924X
卷号	22 期号:1 页码:213-219
摘要	A method to compensate the orthogonality deviation of the Moire fringe photoelectric signal was proposed to improve the accuracy of a photoelectric rotary encoder. Based on Hilbert transform theory, a dynamic measurement algorithm for the orthogonality deviation of same frequency photoelectric signal was constructed. In the light of the mathematical model for Moire fringe photoelectric signal, the influence of orthogonality deviation on subdivision precision was analyzed and an angle compensation model was set up. According to the working principle of the encoder, a synchronous processing mode was adopted to compensate the photoelectric signal and update dynamically the lookup table for angle codes simultaneously; by the switching of subdivision lookup table, the orthogonality deviation for the photoelectric signal was compensated in real time. Finally, a 23-bit photoelectric encoder with 18 orthogonality deviation was compensated using this method. Experimental results show that the peak value of subdivision error of the encoder has reduced from 4.79" to 1.26 " after compensation. This method can actually be used in an encoder system and it can improve the subdivision accuracy, environmental adaptability and the reliability of encoders.
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/44311
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Gao X.,Wan Q.-H.,Zhao C.-H.,et al. Real-time compensation of orthogonality deviation for Moire fringe photoelectric signal[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2014,22(1):213-219.
APA	Gao X.,Wan Q.-H.,Zhao C.-H.,Sun Y.,&Yang S.-W..(2014).Real-time compensation of orthogonality deviation for Moire fringe photoelectric signal.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,22(1),213-219.
MLA	Gao X.,et al."Real-time compensation of orthogonality deviation for Moire fringe photoelectric signal".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 22.1(2014):213-219.

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