Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1998-06-12
2000-03-28
Walberg, Teresa
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219505, H05B 102
Patent
active
060434651
ABSTRACT:
The present invention is a temperature measurement device for furnace heating elements, a furnace utilizing the temperature measurement device and a method for measuring a temperature of the heating element utilizing the temperature measurement device. In its most basic form, the temperature measurement device of the present invention comprises a first electrical connector for carrying a first input signal from a heating element of a furnace, a second electrical connector for carrying a second input signal from a transformer of the furnace, a voltage measurement device in electrical connection with the first input signal and the second input signal, a current measurement device in electrical connection with the first input signal and the second input signal, a resistance measuring device in electrical communication with the voltage measurement device and the current measurement device for calculating the resistance of the heating element, and a temperature calculator in electrical communication with the resistance measuring device for comparing the resistance of the heating element with a plurality of predetermined resistance versus temperature relationships to determine a temperature of the heating element corresponding to the resistance of the heating element. The preferred temperature measurement device includes a summing device for determining a difference in a voltage between the first input signal and the second input signal and a dividing device for dividing a voltage through the heating element by a current through the heating element to determine the resistance of the heating element.
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Andersen Ingar Fred
Cote Paul R.
Persson Michael J
Pin Jeffrey
Ritchie William B.
Thermal Technology Inc.
Walberg Teresa
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