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Coded disc for encoders

A technology of encoders and code discs, applied in the field of encoder code discs, can solve problems such as the number of codes cannot be made too high, the influence of code width and code length, and the structure of code discs is complicated, so as to achieve a wide range of applications and increase the number of code positions. , Improve the effect of coding accuracy

Inactive Publication Date: 2013-04-03
常州科教城新能源汽车工程技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is affected by the radius of the code disc, and the closer to the center, the smaller the scale, so the code width and code length are affected, the number of codes cannot be made very high, and the number of codes directly affects the measurement accuracy
In addition, the structure of the code disc of this encoder is complex and difficult to process.

Method used

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  • Coded disc for encoders

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment is an encoder code disc.

[0019] The code disc is ring-shaped, and the code disc is uniformly set with 2 to the Nth power coding areas along the circumferential direction, N represents the number of bits of the binary code, N≥2; the coding area represents the binary code 0 or 1; consecutive N coding areas represent an N bit binary code value, and for any binary code value of N bits, there can be found on the code disc corresponding to N consecutive coding areas. The coding area on the code wheel is divided into conductive area and non-conductive area, wherein the conductive area represents binary code 1, and the non-conductive area represents binary code 0; or the conductive area represents binary code 0, and the non-conductive area represents binary code 1.

[0020] See figure 1 , the code wheel is evenly set with sixteen coding areas along the circumferential direction, and the sixteen coding areas represent binary codes in turn: 0, 0, 0, 0, 1, 0, 0,...

Embodiment 2

[0022] This embodiment is basically the same as Embodiment 1, the difference is that: the coding area on the code disc is divided into a light-transmitting area and an opaque area, wherein the light-transmitting area represents binary code 1, and the opaque area represents binary code 0; Or the transparent area represents the binary code 0, and the opaque area represents the binary code 1.

Embodiment 3

[0024] This embodiment is basically the same as Embodiment 1, the difference is that: the coding area on the code disc is divided into a magnetic area and a non-magnetic area, wherein the magnetic area represents binary code 1, and the non-magnetic area represents binary code 0; or the magnetic area represents Binary code 0, non-magnetic area represents binary code 1.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/347
Inventor 庄宪王瑛
Owner 常州科教城新能源汽车工程技术研究院
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