The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2009
Filed:
Feb. 09, 2006
Kiyotaka Uehira, Osaka, JP;
Kouji Oike, Kyoto, JP;
Noritaka Ichinomiya, Nara, JP;
Kiyotaka Sasanouchi, Osaka, JP;
Kouichi Santo, Osaka, JP;
Kiyotaka Uehira, Osaka, JP;
Kouji Oike, Kyoto, JP;
Noritaka Ichinomiya, Nara, JP;
Kiyotaka Sasanouchi, Osaka, JP;
Kouichi Santo, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A device for detecting an absolute rotation angle of multiple rotation with a high accuracy and high resolution by using a target connected to the rotation axis and having an outer circumferential surface to which magnetic poles of alternate polarities are magnetized. The device includes: a first rotor holding a target connected to an input axis and having an outer circumferential surface to which magnetic poles of alternate polarities are magnetized at an identical interval and having a multi-rotatable gear; a second rotor connected to the gear of the first rotor, rotated at a low speed by the first rotor, and having a magnet at the center portion; a first detection unit and a second detection unit for detecting the rotation angles of them. With a simple configuration, it is possible to detect an absolution rotation angle with a high accuracy and a high resolution.