Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2004-11-22
2008-12-02
Nghiem, Michael P. (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
Reexamination Certificate
active
07460979
ABSTRACT:
A system and method for sensing position and/or displacement of a moving, substrate, ram, target, piston, encoder wheel or the like. The system includes a plurality of transducers for generating two sinusoidal signals in quadrature related to the position and displacement of the substrate, ram or the like. Alternatively, the sinusoidal signals may be generated by other well-known devices, such as by an optical encoder or the like. The two sinusoidal signals in quadrature are processed to provide enhanced resolution compared to conventional quadrature systems. The system is also capable of self-calibration in order to accommodate fluctuations in the two sinusoidal signals in quadrature.
REFERENCES:
patent: 3956973 (1976-05-01), Pomplas
patent: 4587485 (1986-05-01), Papiernik
patent: 4630928 (1986-12-01), Klingler
patent: 4728193 (1988-03-01), Bartelt
patent: 4923301 (1990-05-01), White
patent: 4972080 (1990-11-01), Taniguchi
patent: 5012239 (1991-04-01), Griebeler
patent: 5041784 (1991-08-01), Griebeler
patent: 5067089 (1991-11-01), Ishii
patent: 5442313 (1995-08-01), Santos
patent: 5719789 (1998-02-01), Kawamata
patent: 5859707 (1999-01-01), Nakagawa
patent: 5867021 (1999-02-01), Hancock
patent: 6084234 (2000-07-01), Stridsberg
patent: 6167108 (2000-12-01), Nakano
patent: 6172359 (2001-01-01), Stridsberg
patent: 6191415 (2001-02-01), Stridsberg
patent: 6232739 (2001-05-01), Krefta
patent: 6294910 (2001-09-01), Travostino et al.
patent: 6456063 (2002-09-01), Moreno
patent: 6459261 (2002-10-01), Luetzow
patent: 6518897 (2003-02-01), Bradford
patent: 6556153 (2003-04-01), Cardamone
patent: 6573710 (2003-06-01), Santos
patent: 6630659 (2003-10-01), Stridsberg
patent: 6975112 (2005-12-01), Morys
patent: 2004/0080491 (2004-04-01), Takatsuka et al.
patent: 0840096 (1998-06-01), None
Buckner, A Thesis “Enhanced Resolution Quadrature Encoder Interface” Nov. 17, 2004.
Decker Robert J.
Khuu Cindy H
Nghiem Michael P.
University of Virginia Patent Foundation
LandOfFree
Method and system for enhanced resolution,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for enhanced resolution,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for enhanced resolution,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4049320