Angle detecting apparatus

Details Angle detecting apparatus Angle detecting apparatus

2008-04-22

2009-02-24

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S174000, C324S207200, C324S251000

Reexamination Certificate

active

07495432

ABSTRACT:
An angle detection apparatus includes a rotation member including at least one north magnetic polar region and at least one south magnetic polar region alternately arranged around a rotation center, a magnetic field detecting portion having a magnetic plate and detecting elements detecting magnitudes of magnetic components in a direction perpendicular to the magnetic plate, and a computing unit determining a rotation angle of the rotation member, wherein the magnetic field detecting portion is disposed so that the magnetic plate is oriented perpendicular to a first direction, where magnetic field intensity is at its maximum, and the magnetic field detecting portion detects the magnitudes of the magnetic components in the first direction and a second direction corresponding to a direction that the north and south magnetic polar regions are circumferentially arranged.

REFERENCES:
patent: 6469499 (2002-10-01), Delaporte
patent: 6545462 (2003-04-01), Schott et al.
patent: 6762897 (2004-07-01), Kabashima et al.
patent: 7064537 (2006-06-01), Sudo et al.
patent: 2001/0009367 (2001-07-01), Seitzer et al.
patent: 2007-040850 (2005-08-01), None
patent: WO 2007/057563 (2006-11-01), None

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