Heater controlling unit using a fuzzy neural network

Details Heater controlling unit using a fuzzy neural network Heater controlling unit using a fuzzy neural network

1995-12-14

1997-11-04

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219505, 219506, 374107, 395900, H05B 102

Patent

active

056836058

ABSTRACT:
A heater controlling unit used in a heat fusing device of an image forming apparatus, such as a copying machine, comprises a temperature detecting unit for outputting a detected temperature, a temperature change rate computing unit for computing the surface temperature of a heat fusing roller using the output of the temperature detecting unit, and an on-time computing and controlling unit for computing a heater on-time within a predetermined period by means of a fuzzy neural network using the above temperature and a temperature change rate found by the temperature-change rate computing unit, a heater controlling circuit for controlling the on/off action of the heater, a predictive computing unit for predicting the surface temperature, and a comparing and adjusting unit for comparing the actual temperature with the predicted temperature, and, when the difference is greater than a predetermined value (e.g., .+-.5.degree. C.), for adjusting the weights of the links within the network. Accordingly, the roughly-set parameters can be amended to the ones for an optimal on-time by the sequential learning. As a result, the program can be generated in a simpler manner, and the program can be changed easily for individual units depending on aged distortion and environments thereof.

REFERENCES:
patent: 4570054 (1986-02-01), Chidzey et al.
patent: 4868368 (1989-09-01), Araki
patent: 4948950 (1990-08-01), Rae
patent: 5311268 (1994-05-01), Ohzeki et al.
patent: 5386099 (1995-01-01), Has

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