Title:
アブソリュートエンコーダ
Document Type and Number:
Japanese Patent JP4950713
Kind Code:
B2
Abstract:
A printed circuit board on which are laid out detection windings and an excitation magnetic flux detection winding formed of conductor patterns is disposed so as to be spaced a predetermined gap quantity from a binary cyclic random number sequence code plate which is rotatably disposed. A U-shaped exciting core on which an excitation winding is wound is disposed on the back surface side of the printed circuit board. The detection windings detect and output, as voltage values, reluctance changes as which excitation magnetic fluxes generated from the excitation winding fluctuate between this excitation winding and the concave/convex portion of the binary cyclic random number sequence code plate. Reduction of precision due to interferences between the excitation magnetic fluxes for detecting an absolute code and other excitation magnetic flux is thereby prevented.
Inventors:
Koichi Hayashi
Noriyuki Fukui
Noriyuki Fukui
Application Number:
JP2007073247A
Publication Date:
June 13, 2012
Filing Date:
March 20, 2007
Export Citation:
Assignee:
Okuma Corporation
International Classes:
G01D5/249
Domestic Patent References:
| JP5118874A | ||||
| JP6207833A | ||||
| JP200664513A | ||||
| JP247516U |
Attorney, Agent or Firm:
Kenji Yoshida
Jun Ishida
Jun Ishida