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Vol. 16, Special Issue, November 2012, pp. 108-115




Study on Frequency Division Technique of Photoelectric Encoder


1 Shi-Xiong Zhang, 1 Bing-Sheng Yan, 1 Yan-Fang Guan

1 School of Mechanical & Electrical Engineering,
Henan University of Technology, No.195, Zhongyuan Rd., Zhengzhou, 450007, China


E-mail: cehonzhang@gmail.com, sqj433@emails.bjut.edu.cn, yfg8120@haut.edu.cn



Received: 11 September 2012   /Accepted: 11 October 2012   /Published: 20 November 2012

Digital Sensors and Sensor Sysstems


Abstract: A scheme to realize frequency division of photoelectric encoder is proposed in this paper. The main idea of the scheme goes like this: the input orthogonal pulse sequence is quadrupled and then divided to form a single-phase frequency sequence. After that, a state machine is designed to convert single-phase signal to orthogonal signal. This scheme can achieve any integral multiple frequency division of orthogonal pulse sequence generated by servo motors or linear scales, etc. Simulation and experiment have been done by using Libro software of Actel Company and its FPGA product APA300. The results show that this scheme is feasible.


Keywords: Frequency division, Photoelectric encoder, Electronic gear ratio



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