Research on a single-ring absolute coder disc encoding and decoding technology combined with Huffman coding

Photoelectric shaft encoder is a kind of high-precision angle measuring device ,its core angle measuring component is encoder disc. In this paper, a single-ring absolute coding method combining Huffman coding is proposed. The Huffman coding algorithm commonly used for teletext compression transmission is applied to the single-ring photoelectric axis encoder to realize the new single-ring coding method of the coder disc. The method constructs a special Huffman binary tree and designs a special traversal sequence, which is traversed from top to bottom in this order. The code obtained at the leaf node is the shift sequence code required by the code disc, which can be used to engrave a single-circle absolute code disc. This method can improve the coding speed and reduce the complexity of the algorithm under the premise of high-order coding. It provides technical support for the research of small high-resolution photoelectric shaft encoder and accelerates its development speed.