基于CPLD的光电编码器测量系统*

作者：闫莎莎，朱世强，刘华山，吴剑波 日期：2009-02-23/span> 浏览：4040 查看PDF文档

基于CPLD的光电编码器测量系统*

闫莎莎，朱世强，刘华山，吴剑波
（浙江大学 流体传动及控制国家重点实验室，浙江 杭州 310027）

摘要：为了提高光电编码器的反馈精度和消除正交波形中的抖动，提出了一种基于复杂可编程逻辑器件且具有倍频鉴相和滤波功能的光电编码器测量系统。介绍了光电编码器测量原理，将系统划分为滤波鉴相、倍频、计数3个模块，并对这3个模块进行了电路设计和仿真。仿真结果表明，该设计方法能够满足高精度伺服电机正交编码的信号处理要求。
关键词：光电编码器；滤波鉴相；倍频；计数；复杂可编程逻辑器件
中图分类号：TP212.14文献标识码：A文章编号：1001-4551(2009)01-0077-03

Photoelectrical encoder system based on CPLD
YAN Shasha, ZHU Shiqiang, LIU Huashan, WU Jianbo
（State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China）
Abstract: To improve the feedback precision of the photoelectric encoder and remove the disturbance of the rectangular waveform, a photoelectric encoder measuring system based on complex programmable logic device(CPLD) was offered, which had the ability of frequency multiplication and filtering. The photoelectric encoder measurement principle was introduced. The system was divided into three modules, including filtering phase, frequency and the counter. These three modules were designed and simulated. The simulation results show that the design methods meet signal processing requirements of highprecision servo motor orthogonal coding.
Key words: photoelectric encoder; filtering and phase demodulation ; frequency multiplication; count; complex programmable logic device(CPLD)
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