Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Reexamination Certificate
2007-04-24
2007-04-24
Duda, Rina (Department: 2837)
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
C318S560000, C318S461000, C318S632000
Reexamination Certificate
active
11422755
ABSTRACT:
A digital speed controlling apparatus includes: a target speed calculator that calculates a target speed of a driven conveyor belt, based on a sampling time; a current speed calculator that calculates a current speed of the conveyor belt, based on displacement and a difference of a sampling time; a target speed determining unit that determines whether a target speed is smaller than a predetermined value; a speed corrector that replaces the current speed with a set value, when the target speed is smaller than the predetermined value and also when the current speed is the minimum unit displacement per the sampling cycle; a speed error calculator that calculates an error between a replaced set value and the target speed; and an automatic controller that controls the drive motor based on a speed error.
REFERENCES:
patent: 4458471 (1984-07-01), Herwig
patent: 5130748 (1992-07-01), Tanaka
patent: 5331267 (1994-07-01), Anderson
patent: 6114818 (2000-09-01), Ohtsubo et al.
patent: 6712906 (2004-03-01), Estelle et al.
patent: 3271440 (2002-01-01), None
patent: 2003-108229 (2003-04-01), None
patent: 2003-204690 (2003-07-01), None
patent: 2004-13810 (2004-01-01), None
patent: 2004-40839 (2004-02-01), None
patent: 2004-98678 (2004-04-01), None
patent: 2004-129488 (2004-04-01), None
patent: 2004-215370 (2004-07-01), None
patent: 2004-312992 (2004-11-01), None
patent: 2004-343859 (2004-12-01), None
patent: 2004-357374 (2004-12-01), None
patent: 2005-14297 (2005-01-01), None
Duda Rina
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
LandOfFree
Digital speed controlling apparatus, digital motor... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital speed controlling apparatus, digital motor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital speed controlling apparatus, digital motor... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3722922