Electricity: motive power systems – Automatic and/or with time-delay means – Time or with time-delay means
Reexamination Certificate
2007-05-31
2011-11-15
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Time or with time-delay means
C318S626000
Reexamination Certificate
active
08058831
ABSTRACT:
The invention relates to a control device and a control method which enhance accuracy in detecting a speed of a driven body to stably control drive means. An encoder signal control section (25) compares lengths of time between a rising measurement time kept by a rising edge interval counting section (38) and a rising period of the latest rising edge stored in a rising edge interval history section (39), and then outputs a value of either the rising measurement time or the rising period, whichever is longer based on a comparison result, so that a period of a pulse signal (36) can be accurately predicted and be a real-time approximate, which allows for accurate calculation of the speed of the driven body based on the accurately outputted period of the pulse signal (36), and the accuracy in detecting the speed of the driven body can be enhanced with the result that the drive means can be stably controlled.
REFERENCES:
patent: 4621224 (1986-11-01), Watabe et al.
patent: 4992730 (1991-02-01), Hagiya
patent: 5233292 (1993-08-01), Nagata et al.
patent: 6302514 (2001-10-01), Eade et al.
patent: 6310458 (2001-10-01), Fenstermacher
patent: 6390588 (2002-05-01), Ikeda
patent: 2002/0021232 (2002-02-01), Shoji et al.
patent: 2004/0140784 (2004-07-01), Kobayashi et al.
patent: 2002-34274 (2002-01-01), None
patent: 2004-129488 (2004-04-01), None
patent: 2004-307163 (2004-11-01), None
patent: 2004-343859 (2004-12-01), None
Birch & Stewart Kolasch & Birch, LLP
Ro Bentsu
Sharp Kabushiki Kaisha
LandOfFree
Control device and control method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control device and control method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control device and control method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4302389