Rotation angle-detecting device

Details Rotation angle-detecting device Rotation angle-detecting device

2007-04-10

2007-04-10

Aurora, Reena (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207210

Reexamination Certificate

active

10511729

ABSTRACT:
The rotation angle-detecting device has a main rotator and two detecting rotators that rotate as the main rotator rotates. Each of the two detecting rotators has a magnet and a magnetic detector. As the detecting rotator rotates, a change occurs in magnetic lines of force from the magnet. From the change, the magnetic detector detects rotation of the detecting rotator. According to the rotation detected, the device determines the rotation angle of the main rotator. In addition, a ring-shaped ferromagnetic body is disposed around the magnet or the magnetic detector of the detecting rotator. The structure described above enables magnetic detection without disturbance in each magnetic field of the magnets, and even in a downsized structure, the device can detect the rotation angle with high accuracy.

REFERENCES:
patent: 5602472 (1997-02-01), Bergstedt et al.
patent: 6861837 (2005-03-01), Shimizu et al.
patent: 6909281 (2005-06-01), Gassman et al.
patent: 6909282 (2005-06-01), Onishi et al.
patent: 11-500828 (1999-01-01), None
patent: 2001-165609 (2001-06-01), None
patent: 2002-213910 (2002-07-01), None
patent: 2003-4485 (2003-01-01), None

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