Title:
ANGLE SENSOR
Document Type and Number:
WIPO Patent Application WO/2010/026948
Kind Code:
A1
Abstract:
Provided is an angle sensor using a magnetoresistance effect element, for increasing the angle detection accuracy. The angle sensor comprises a magnet (2) attached to a body of revolution which is rotatable, which is rotatable together with the body of revolution, an annular yoke (3) annularly extending in such a manner as to surround the outer peripheral surface of the magnet (2) around the rotation axis, being provided with a notch portion (11) in part of itself in an extending direction thereof, and a GMR element (4) provided in the notch portion (11), for detecting the direction of a magnetic field generated inside the notch portion (11), to thereby make the rotation angle of the magnet (2) coincident with the direction of the magnetic field affecting the GMR element (4).
Inventors:
TOKUNAGA ICHIRO (JP)
Application Number:
PCT/JP2009/065192
Publication Date:
March 11, 2010
Filing Date:
August 31, 2009
Export Citation:
Assignee:
ALPS ELECTRIC CO LTD (JP)
TOKUNAGA ICHIRO (JP)
TOKUNAGA ICHIRO (JP)
International Classes:
G01B7/30; G01D5/18
Foreign References:
| JP2004271495A | 2004-09-30 | |||
| JP2005214750A | 2005-08-11 | |||
| JPH0914908A | 1997-01-17 |
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
Hiroyoshi Aoki (JP)
Hiroyoshi Aoki (JP)
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