Hybrid optical cylinder position sensor

Details Hybrid optical cylinder position sensor Hybrid optical cylinder position sensor

2005-01-31

2009-12-15

Strege, John B (Department: 2624)

Image analysis

Image transformation or preprocessing

Measuring image properties

C382S151000, C382S152000, C382S287000

Reexamination Certificate

active

07634155

ABSTRACT:
Consistent with an aspect of the present disclosure, a method of locating a position of a movable member is provided. The movable member is movable along a path and has a surface with a plurality of markings provided thereon. The method includes sensing an image of a portion of the surface of the movable member, and calculating a position of the movable member based on the image. Further, the method includes determining whether the movable member is at a location corresponding to one of the plurality of markings, and eliminating an error associated with the position when the movable member is at the location corresponding to the one of the plurality of markings.

REFERENCES:
patent: 5539993 (1996-07-01), Kilpinen et al.
patent: 5951475 (1999-09-01), Gueziec et al.
patent: 6556946 (2003-04-01), Sewell
patent: 7191943 (2007-03-01), Sewell et al.
G. Gordon et al.,Silicon Optical Navigation, The Mechanical Computer Mouse, pp. 1-7, http://www.labs.agilent.com
ews/2003features/Gordon—optical—nav.pdf.

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