Single-ring absolute encoder is one of the latest techniques in the world. The method using black-white stripe to encode in single ring absolute encoder has made a breakthrough in the conventional encoding principle. The absolute encoder can be implemented by sensor fusion

image processing

computer control

etc. In this paper

the fundamental principle and theoretical basis of the single-ring absolute encoder are specified

and the system hardware design is illustrated. The experimental results show that both the system design and its theoretical basis are correct.