Title:
ROTATION ANGLE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/053939
Kind Code:
A1
Abstract:
A rotation angle detection device having a magnet (110) that can be attached to
a rotation body (Sh) as a target for rotation measurement so as to rotate with the
rotation body (Sh) and whose magnetic flux density around the rotation body (Sh)
changes with rotation of the rotation body (Sh), and the rotation angle detection
device also having detection elements ((150)(151-154)) that detect a change
in magnetic flux density of the magnet (110). The detection elements (150) are
a pair of detection elements having the same characteristics, and the pair of
detection elements (150) are arranged at different positions in the circumferential
direction relative to the center of rotation of the rotation body (Sh) so that
the detection elements (150) are equidistantly spaced from the rotation center.
Detection characteristics are not affected even if the rotation angle detection
device is used in an environment where temperature changes rapidly.
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Inventors:
IIJIMA TAKASHI (JP)
IIZUKA SHINICHIRO (JP)
IIZUKA SHINICHIRO (JP)
Application Number:
PCT/JP2007/071259
Publication Date:
May 08, 2008
Filing Date:
October 31, 2007
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
IIJIMA TAKASHI (JP)
IIZUKA SHINICHIRO (JP)
IIJIMA TAKASHI (JP)
IIZUKA SHINICHIRO (JP)
International Classes:
G01D5/18; G01B7/30; H01L43/06; H01L43/08
Foreign References:
| JPS60220816A | 1985-11-05 | |||
| JP2001091300A | 2001-04-06 | |||
| JP2000065596A | 2000-03-03 | |||
| JP2004226382A | 2004-08-12 |
Other References:
See also references of EP 2078930A4
Attorney, Agent or Firm:
MIYAKAWA, Kohichi (17-1 Minamifujisaw, Fujisawa-shi Kanagawa, JP)
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