Fixed grating and photoelectric encoder

Abstract

The invention discloses a fixed grating and a photoelectric encoder. The fixed grating comprises a second increment code track arranged in a preset area; the preset area is corresponding to a first increment code track and the width is the same as that of the first increment code track; the second increment code track is an evenly-distributed step code track according to a preset layer number in the width direction; the left-right interval of the step code track is the length of the first increment code track; the offset in the left-right direction of any two adjacent layers in the same step code track is the preset offset; the length of each layer is the product between the preset number plus one and the preset offset; and the preset offset is the quotient when the length of the first increment code track is divided by twice the preset number. According to the technical scheme of the invention, high-precision subdivision on source signals is facilitated, the photoelectric encoder is facilitated, and requirements of high resolution and small size are met.

Description

technical field [0001] The invention relates to the technical field of industrial control and automation, in particular to a fixed grating and a photoelectric encoder. Background technique [0002] The photoelectric encoder is an angle measuring device integrating optics, machinery and electricity. It converts optical signals into electrical signals through mechanical structures and signal processing circuits, so as to realize direct or direct measurement of various physical quantities such as angular displacement, speed and position. indirect measurement. [0003] In the absolute photoelectric encoder, the absolute encoding of the moving grating can realize that the encoding of each set angle in one circle is unique. In order for the photoelectric encoder to meet the requirements of high resolution and small size at the same time, it is necessary to process the collected signal through electronic subdivision, and the source signal used in electronic subdivision is the corn...

AI Technical Summary

Problems solved by technology

[0004] In the current technology, the design of each incremental code channel of the fixed grating adopts a rectangular structure, and the generated source signal is in the form of a triangular wave, which is not conducive to high-precision subdivision, so it is difficult to make the photoelectric encoder meet the requirements of high resolution and high resolution at the same time. small size requirements

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