Sensor including two code rings and a magnetic field sensor...

Details Sensor including two code rings and a magnetic field sensor... Sensor including two code rings and a magnetic field sensor...

2009-01-14

2011-12-27

Aurora, Reena (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

Reexamination Certificate

active

08085036

ABSTRACT:
An apparatus includes a shaft and a first code ring including a first number of pole pairs. The first code ring is attached to the shaft. The apparatus includes a second code ring including a second number of pole pairs different from the first number. The second code ring is attached to the shaft and spaced apart from the first code ring. The apparatus includes a first magnetic field sensor between the first code ring and the second code ring for sensing a first superposition of magnetic fields provided by the first code ring and the second code ring.

REFERENCES:
patent: 4746859 (1988-05-01), Malik
patent: 5195382 (1993-03-01), Peilloud
patent: 5371635 (1994-12-01), Sakaguchi et al.
patent: 7210360 (2007-05-01), Schroeder et al.
patent: 7339370 (2008-03-01), Reimer et al.
patent: 100036281 (2002-02-01), None
patent: 102007057050 (2008-07-01), None
patent: 09189624 (1997-07-01), None
“Development of a Contactless Hall Effect Torque Sensor for Electric Power Steering”, Didier Angleviel, SAE International, 2005 (8 pgs.).

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