Electric heating – Heating devices – With current connection and/or disconnection means
Patent
1986-04-22
1988-03-08
Paschall, M. H.
Electric heating
Heating devices
With current connection and/or disconnection means
219497, 219485, 340589, 432 51, 374 25, 374102, H05B 102
Patent
active
047301015
ABSTRACT:
A microcomputer control system for a furnace is disclosed which provides accurate control of the temperature of the furnace such that the temperature can be quickly increased to a predetermined desired temperature without overshooting the desired temperature. The control system determines the tuning constants of the furnace as a function of the system's response to a predetermined input and, thereafter, uses the determined tuning constants to accurately control the temperature of the furnace. The control system employs a novel method for increasing the temperature of a furnace wherein full power is applied to the furnace heat source until the microcomputer makes the determination, based upon the furnace tuning constants, that power supplied to the furnace must be reduced to prevent the temperature of the furnace from overshooting the desired temperature. Upon making such a determination, the microcomputer controls the temperature of the furnace such that the furnace temperature exponentially achieves the desired temperature. The control system further includes apparatus adapted to cooperate with the microcomputer for preventing damage to the furnace and materials heated therein from malfunction of either the control system apparatus or the microcomputer software.
REFERENCES:
patent: 4109134 (1978-08-01), Van Herten
patent: 4277671 (1981-07-01), Mori et al.
patent: 4367399 (1983-01-01), Anthony et al.
patent: 4451726 (1984-05-01), Anthony et al.
patent: 4461616 (1984-07-01), Vukovich
patent: 4476373 (1984-10-01), D'Antonio
patent: 4506143 (1985-03-01), Telis et al.
patent: 4570054 (1986-02-01), Chidzey et al.
patent: 4614860 (1986-09-01), Kativois
patent: 4620083 (1986-10-01), Andre
Ziegler, J. G. and Nichols, N. B., "Optimum Settings for Automatic Controllers", Transactions of the American Society of Mechanical Engineers, Nov. 1942.
Ziegler, J. G. and Nichols, N. B., "Process Lags in Automatic-Control Circuits", Transactions of the American Society of Mechanical Engineers, Jul. 1943.
Mahon Kenneth
Sheffield Gary S.
Snider Gary L.
Vukovich, Jr. Milan
Edward Orton Jr., Ceramic Foundation
Paschall M. H.
LandOfFree
Apparatus and method for controlling the temperature of a furnac does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for controlling the temperature of a furnac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling the temperature of a furnac will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-232315