增量式编码器的一种新的参考点归零算法及其实验研究  

A novel zero-reference-finding algorithm for incremental encoders and its experiments

作　　者：苗中华[1] 刘成良[1] 王旭永[1] 陶建峰[1] 雒宝莹[1] 扬飞鸿[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《高技术通讯》2009年第3期279-283,共5页Chinese High Technology Letters

基　　金：863计划(2006AA04Z432);973计划(2007CB714003)资助项目

摘　　要：针对增量角度编码器在绝对定位场合下开机时必须先执行参考点归零操作的问题,基于带距离编码参考点的增量式编码器所具有的独特编码机制,提出了一种新的参考点归零算法,并详述了该算法的原理、实现方法及实验研究。该算法无需经过零位刻线即可建立参考原点,在快速性、精确性、抗干扰能力等方面相比一般增量式编码器找零算法具有突出的优势。实验结果验证了所提算法的有效性、快速性和鲁棒性,从而用增量式编码器实现了角度的绝对位置测量与定位,具有理论创新性与极强的工程实践价值。In view of the problem that an incremental eneoder must perform the zero-finding to establish its mechanical origin when it starts to work in the case of absolute positioning, the paper proposes a novel zero-finding algorithm based on the unique coding mechanism of the incremental encoder with the distance-coded reference mark. The principle of the zero- finding algorithm and its implementation approach are detailed, and the experiments carried out are described. The novel algorithm can easily establish the mechanical origin without running across the zero-reference mark, which features some advantages in rapidity, veracity and anti-jamming ability compared to the algorithms in general incremental encoders. The experimental results show that the proposed algorithm is not only feasible and effective, but also rehable and robust. The measurement and absolute positioning for angle are achieved by the incremental encoder without scanning across the zero reference, and it is full of innovation and practical value in engineering.

关 键 词：找零算法 距离编码参考点 参考原点 增量式编码器 绝对位置定位 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]