Single-code coding and decoding method based on absolute position determination

Abstract

The invention discloses a single-code coding and decoding method based on absolute position determination. The method comprises the following steps of: representing multiple code words into different continuous partitions of a linear code, identifying code words represented by the code by utilizing light emitting diodes arranged at the two sides of the code and an optical pulse signal fed back by a receiver, identifying the code words by adopting the decoding method disclosed by the invention, and finding the partition in the code corresponding to the code words, namely the absolution position corresponding to the code words. The single-code coding and decoding method disclosed by the invention has the effective effects that the coding and decoding method is simple and has high reliability, decoding is convenient and measuring accuracy can be guaranteed, the absolute position can be rapidly and accurately determined, and the problem that the conventional absolute position coder has a complex structure and high cost can be solved. Although representational capacity and coding efficiency are lower than those of an m sequence, a cross-correlation function is more ideal compared with the conventional coding method, data quantity required to be maintained is greatly reduced, and position and information of a code can be accurately determined, thus the single-code coding and decoding method disclosed by the invention can be applied to rapid positioning when an information tape moves.

Description

technical field [0001] The invention belongs to the field of industrial control, in particular to a single code channel encoding and decoding method based on absolute position determination. Background technique [0002] With the rapid development of manufacturing and automation technology, the encoder, as a digital sensor integrating digital technology and computer technology, has been widely used in life and production. [0003] Absolute position encoder tracks include circles, curves, straight lines and other types, which are divided into code tracks. The encoding methods for position determination mainly include multi-code track encoding and double-code track encoding. The two codes of the dual-code code are equally spaced fringes, but the fringe spacing is different on different codes, and the position information is given by the phase of the beat signal formed between the codes. The disadvantage of this method is that the signal processing is complicated and the cost i...

AI Technical Summary

Problems solved by technology

[0005] However, in this kind of photoelectric displacement measurement method based on multi-code coding, the manufacturing process of multi-code coding grating is long, the cost is high, and there are many photoelectric conversion elements and electronic devices corresponding to it, so the structure of the measuring device Complicated and cannot be reduced in size

Moreover, the commonly used pseudo-random sequence is currently commonly used for position coding, which has the characteristics of strong representation ability and high coding efficiency, but its disadvantage is that the coding and decoding methods and devices are complicated and costly

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