To solve the contradiction between miniaturization of photoelectric encoders and high-precision measurement, a matrix coding and decoding method based on 16 quadrants is proposed in this paper. 21-bit matrix coding can be realized by engraving two circles of matrix code tracks, compared with traditional optoelectronic encoders, this encoder achieves higher accuracy with fewer code circles. In this paper, the design of a new-type matrix code disk, the design of coding and decoding methods and simulation analysis are mainly carried out. Theoretical calculation and simulation analysis show that the encoder designed is feasible, and this paper proposes a new method for the miniaturization and high-precision measurement of encoder.
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