Absolute position sensing

Details Absolute position sensing Absolute position sensing

2011-04-26

2011-04-26

Masih, Karen (Department: 2837)

Electricity: motive power systems

Linear-movement motors

C318S034000, C318S558000

Reexamination Certificate

active

07932684

ABSTRACT:
To determine the relative position of movable portions of an assembly, a first magnetic device is coupled to a first portion of the assembly. The first magnetic device has a sensing surface with a number of magnetic poles that provide a magnetization state transition location. An absolute position sensor with a two-state output is coupled to the assembly adjacent the first magnetic device. The output state changes when a magnetization state transition of the first magnetic device moves past the absolute position sensor. A second magnetic device is coupled to the assembly. The second magnetic device creates a cyclically-varying magnetic field proximate its sensing surface. An incremental position sensor is coupled to the assembly adjacent the second magnetic device, and has an output that varies continuously relative to magnetic field angle over at least a portion of one cycle of the cyclically-varying magnetic field of the second magnetic device.

REFERENCES:
patent: 4981309 (1991-01-01), Froeschle et al.
patent: 5130583 (1992-07-01), Andoh
patent: 5225725 (1993-07-01), Shiraki et al.
patent: 5341097 (1994-08-01), Wu
patent: 5351003 (1994-09-01), Bauer et al.
patent: 5574445 (1996-11-01), Maresca et al.
patent: 5691582 (1997-11-01), Lucas et al.
patent: 5796186 (1998-08-01), Nanba et al.
patent: 5920248 (1999-07-01), Travostino
patent: 6100681 (2000-08-01), Tsuruta
patent: 6573623 (2003-06-01), Tsuboi et al.
patent: 6707293 (2004-03-01), Wan et al.
patent: 6982530 (2006-01-01), Takeuchi
patent: 2001/0054851 (2001-12-01), Tsuboi et al.
patent: 2007/0255087 (2007-11-01), Minai
patent: 2008/0246466 (2008-10-01), Jajtic et al.
patent: 2009/0128930 (2009-05-01), Fujioka et al.
patent: 4428333 (1996-02-01), None
patent: 200 09 814 (2001-10-01), None
patent: 102004045934 (2006-04-01), None
patent: 0726448 (1996-08-01), None
patent: 2004015375 (2004-02-01), None
Invitation to Pay Additional Fees and, Where Applicable, Protest Fee dated Sep. 3, 2009 for PCT/US2009/036898.
Invitation to Pay Additional Fees and, Where Applicable, Protest Fee dated Sep. 7, 2009 for PCT/US2009/036915.
International Search Report and Written Opinion dated Nov. 26, 2009 for PCT/US2009/036915.
Sentron: “2SA-10 Integrated 2-Axis Hall Sensor” Internet Citation [Online], http://www.sentron.ch/datasheets/2SA-10.pdf> [retrived Aug. 24, 2009] p. 8.
International Search Report and Written Opinion dated Dec. 23, 2009 for PCT/US2009/036898.
Machine Translation for previously submitted DE20009814.
International Preliminary Report on Patentability dated Oct. 7, 2010 for PCT/US2009/036915.
International Preliminary Report on Patentability dated Oct. 7, 2010 for PCT/US2009/036898.
EP OA dated Feb. 28, 2011 for EP Appln. No. 09725766.1.
EP OA dated Feb. 28, 2011 for EP Appln. No. 09724600.3.

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