Coded disc for encoders

Abstract

The invention discloses a coded disc for encoders. The coded disc is ring-shaped, the coded disc is uniformly provided with 2N encoding areas along the circumferential direction thereof, N refers to the digit of binary code, and N is greater than or equal to 2; and the encoding area refers to a binary code 0 or 1; the consecutive N encoding areas refer to N-bit binary code values, and for any N-bit binary code value, consecutive N encoding areas corresponding to the N-bit binary code value can be found on the coded disc. Because the coded disc disclosed by the invention is ring-shaped, and the coded disc is circumferentially uniformly provided with 2N encoding areas, a coded path is changed from a diameter direction into a circumferential direction, and due to the structure, the circumferential length of the coded disc and the space of the coded disc are fully used, and the code bit is effectively increased, thereby improving the encoding accuracy.

Description

technical field

[0001] The invention relates to encoder code discs. Background technique

[0002] A code disc is a digital encoder that measures angular displacement. It has the advantages of strong resolution, high measurement accuracy and reliable operation. It is the most commonly used displacement sensor for measuring the angular position of the shaft. The code disc is divided into two types: absolute encoder and incremental encoder, the former can directly give the digital code corresponding to the angular position; the latter uses the calculation system to calculate the pulse increment generated by the rotating code disc against a certain reference number Add and subtract to find the angular displacement.

[0003] The most common disc-type optical encoder is an absolute value angle encoder, which uses digital coding to represent the displacement from the origin, that is, engraves a scale mark on the scale, and when the sub-scale stops moving , use the reading symbol...

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