Design of absolute encoder disk coding based on affine n digit N-ary gray code

摘要

This paper presents a proposal to design the absolute encoder disk based on n digit N-ary cyclic gray code. The n digit N-ary cyclic gray code is generated using affine transformation. Based on the concept of the n digit N-ary cyclic gray code, two types of the coded tracks were designed, namely, Nary cyclic color coded track and N-ary cyclic gray scale coded track. The resolution of the proposed coded disk is compared with the traditional gray coded disk. A 5 digit 5-ary color coded disk gives approximately 100 times better resolution than the traditional binary gray coded track with same number of coded tracks and sensors.