US 12,092,454 B2
Absolute encoder, non-transitory storage that stores a program for outputting angle error information of absolute encoder, and method for outputting angle error information of absolute encoder
Yujin Ishi, Nagano (JP)
Assigned to MINEBEA MITSUMI Inc., Nagano (JP)
Appl. No. 17/759,730
Filed by MINEBEA MITSUMI Inc., Nagano (JP)
PCT Filed Jan. 27, 2021, PCT No. PCT/JP2021/002841
§ 371(c)(1), (2) Date Jul. 29, 2022,
PCT Pub. No. WO2021/153613, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 2020-015092 (JP), filed on Jan. 31, 2020.
Prior Publication US 2023/0332877 A1, Oct. 19, 2023
Int. Cl. G01B 7/30 (2006.01); G01D 5/14 (2006.01)
CPC G01B 7/30 (2013.01) [G01D 5/145 (2013.01); G01D 2205/26 (2021.05); G01D 2205/28 (2021.05)] 7 Claims
OG exemplary drawing
 
1. An absolute encoder, comprising:
a first driving gear configured to rotate according to rotation of a main spindle;
a permanent magnet rotatable together with the first driving gear;
an angle sensor configured to detect a rotation angle of the first driving gear corresponding to a change in a magnetic flux generated from the permanent magnet;
a microcomputer configured to output angle position information of the first driving gear in a stopped state;
wherein the microcomputer outputs angle error information of the first driving gear corresponding to the angle position information, and
the microcomputer sets the angle error information based on the position in the stopped state, in accordance with an intermediate value between a maximum value and a minimum value of an angle error with respect to a rotation angle of the first driving gear.