基于CPLD的高响应高精度伺服系统位置信息实时采集系统设计与实现∗

摘要

The study expounded absolute photoelectric encoder’s principle, designed a set of position detection scheme based on 17 bits serial encoder, and presented serial encoder position detection method’s hardware block diagram. The system divided the CPLD code into four modules according to function, and expounded the of each module’s design principle in detail. At last, we set up the experimental platform to read the position information. According to the experiment, the solution can read the location information with high precision. It is suitable for high response and high precision servo system.%阐述了绝对式光电编码器的工作原理，设计了一套基于17 bit串行编码器的位置检测方案，给出了串行编码器位置检测方式的硬件框图。按照功能将CPLD代码分成4个模块，并对各个模块的设计原理进行了详细的阐述。搭建了试验平台进行了位置读取的试验测试。由试验结果知，此方案能很好地读取位置信息，且精度很高，适用于高响应高精度的伺服系统。