基于SOPC的数控系统EnDat2.2接口的设计与实现  

EnDat2.2 Interface Design and Implementation of CNC System Based on SOPC

作　　者：郑一麟[1,2] 林浒 陶耀东[2] 姚恺丰[3] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院沈阳计算技术研究所,沈阳110168 [3]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001

出　　处：《小型微型计算机系统》2012年第6期1377-1380,共4页Journal of Chinese Computer Systems

基　　金：国家科技重大专项(2011ZX04016-071)资助

摘　　要：针对传统数控系统中增量式编码器传输距离短,无法传输绝对位置值等不足,本文设计和实现了应用于绝对式编码器的EnDat2.2接口.本设计采用32位嵌入式软核处理器Nios Ⅱ为数据处理核心,EnDat 2.2为编码器数字接口协议,并完成基于可编程片上系统(SOPC)的硬件设计和相应的驱动设计,通过PCI接口与PC数控上位机协同工作,完成对光电编码器的控制与数据采集.经验证,EnDat2.2接口的高速性和可靠性能满足高档数控系统对运动控制的要求,可以为数控上位机及时地提供准确的位置和速度信息.It is known that the transmission distance of the incremental encoder in traditional CNC System is short,and the absolute position value can not be transferred,therefore this paper aims at designing and implementing the EnDat2.2 interface of the absolute encoder which is achieved by means of the 32-bit embedded soft core processor Nios II as the data processing core,and the EnDat2.2 as the encoder digital interface protocol in order to complete the hardware design and the corresponding drive design based on SOPC.It meanwhile implements the control of optical encoder and the data collection in terms of the cooperation of the PCI interface and the PC-based monitor.It is approved that it is the high speed and the reliability of EnDat2.2 interface that can satisfy the demand of the high-end CNC motion control system and can provide the accurate position and speed information timely for the PC-based monitor.

关 键 词：SOPC EnDat2.2 FPGA NiosⅡ 绝对式编码器 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]