基于CPLD的光电编码器角位移拟合测速法  

Angular Position Fitting Velocity Detection of Incremental Optical Encoder Based on CPLD

作　　者：王辉[1,2] 王慎航 胡建华[1] 

机构地区：[1]中国科学院自动化研究所,北京100190 [2]北京信息科技大学,北京100192

出　　处：《测控技术》2014年第9期22-25,共4页Measurement & Control Technology

基　　金：教育部重点实验室开放课题(KF20131123204)

摘　　要：针对常用的M法和T法无法满足增量式光电编码器整个测速范围内误差要求的问题,提出了对码盘信号进行角位移拟合求采样时刻即时速度的新方法,在匀加速条件下对这3种方法进行了仿真实验,比较了测速误差。实验结果表明,角位移拟合法在整个速度范围内都能获得很高的测速精度和误差一致性。最后用CPLD对该方法加以实现,给出了Verilog硬件描述语言的设计程序和3种方法的实验结果比较。基于CPLD的实现方法电路简单,运行稳定可靠,处理速度快,为角位移拟合法提供了一种非常好的实现方法。An angular position fitting method is developed incremental optical eneoders in servo control systems. The to improve the speed measurement accuracy of the angular position fitting method can get the instantaneous speed at the sampling time. Velocity detecting experiments with generated encoder pulses are taken with M method, T method and the new method under uniformly accelerated speeds. The results show that the new method can achieve high measurement precision and consistency errors over the entire speed range. The implementation based on CPLD is developed with the Verilog hardware language three methods are compared at last. A good way is provided to realize the simple circuit, high reliability and fast processing. and the measurement values of the angular position fitting method with

关 键 词：CPLD 光电编码器 电机测速 角位移 多项式拟合 

分 类 号：TH741[机械工程—光学工程]