A kind of photoelectric code disc and encoder

Abstract

The invention discloses a photoelectric encoding disc and an encoder. The encoding disc comprises an encoding disc substrate, a phase position code channel, a zero position code channel, and an incremental code channel, wherein the phase position code channel, the zero position code channel and the incremental code channel are concentrically loaded on different diameter circumferences, the zero position code channel comprises a first zero position sequence (Z) and a second zero position sequence ( / Z) at two sides of the incremental code channel, the line of the first zero position sequence (Z) comprises 2 to 5 bright gates and 4 to 10 dark gates, the line of the second zero position sequence ( / Z) comprises dark gates with the same number of the bright gates of the first zero position sequence (Z) and bright gates with the same number of the dark gates of the first zero position sequence (Z). According to the scheme of the invention, the defects of low contrast, low measurement precision and poor reliability in the prior art can be overcome, and the advantages of high contrast, high measurement precision and good reliability are realized.

Description

technical field [0001] The invention belongs to the technical field of encoders, in particular to a photoelectric code disc and an encoder, in particular to a high-contrast incremental encoder code disc and a photoelectric encoder with the code disc. Background technique [0002] The photoelectric encoder is a kind of angle measuring equipment integrating light, mechanics and electricity. It converts optical signals into electrical signals through mechanical structure and signal processing circuit, so as to realize the direct or direct measurement of various physical quantities such as diagonal displacement, position and speed. indirect measurement. In the incremental photoelectric encoder, the measurement and calculation of the position must refer to the absolute zero position (for example: the reference position or reference starting point during calculation), so the absolute zero position of the encoder is the core of the incremental encoder design One of the main points...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a photoelectric code disc and an encoder to solve the problem of low contrast of the zero grating in the prior art and achieve the effect of improving the absolute zero accuracy.

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