Title:
ROTARY ENCODER
Document Type and Number:
WIPO Patent Application WO/2023/243303
Kind Code:
A1
Abstract:
This rotary encoder detects, through a detection unit 120, the rotation of a rotary disc 100 provided with an annular code pattern 110, and calculates, through an encoder processing unit 130, the angle of rotation of the rotary disc 100. The code pattern 110 is formed of a first code pattern 111 and a second code pattern 112 in the form of concentric circles. The first code pattern 111 is formed of a plurality of first patterns having a first inclination relative to the radial direction. The second code pattern 112 is formed of a plurality of second patterns having a second inclination in a direction different from the first inclination relative to the radial direction. The encoder processing unit 130 obtains the eccentricity of the code pattern 110 on the basis of a detection result of the first code pattern 111 obtained by the detection unit 120 and a detection result of the second code pattern 112 obtained by the detection unit 120, and corrects the angle of rotation on the basis of the obtained eccentricity.
Inventors:
ISOMURA TSUBASA (JP)
Application Number:
PCT/JP2023/018698
Publication Date:
December 21, 2023
Filing Date:
May 19, 2023
Export Citation:
Assignee:
TAMAGAWA SEIKI CO LTD (JP)
International Classes:
G01D5/244; G01D5/245; G01D5/347
Foreign References:
| JP2010112949A | 2010-05-20 | |||
| JP2007064818A | 2007-03-15 | |||
| JPS5794614A | 1982-06-12 | |||
| JPS6329213A | 1988-02-06 | |||
| JP2010210316A | 2010-09-24 | |||
| US20110220781A1 | 2011-09-15 |
Attorney, Agent or Firm:
SOGA, Michiharu et al. (JP)
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