Process and device for in-service measurement of temperature in

Details Process and device for in-service measurement of temperature in Process and device for in-service measurement of temperature in

1997-12-30

2000-09-12

Paschall, Mark

Electric heating

Heating devices

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

219497, 219449, 219443, 374130, 374120, H05B 102

Patent

active

061181072

ABSTRACT:
A process and cooking area for in-service measurement of temperature in at least one cooking zone of the cooking area with a glass ceramic plate is based on an empirically derived correlation between transmission of light through the glass ceramic plate in a wavelength range of a temperature that is typical of the respective glass ceramic material. The process includes irradiation of the glass ceramic plate in the cooking zone from the inside toward the outside with light in the wavelength range of 700-1500 nm, with the light being reflected at the outer surface of the glass ceramic plate and passing through the glass ceramic plate a second time. Detection of reflected light with a photocell, generates a photocurrent that corresponds to the transmission of the glass ceramic plate in the cooking zone. The temperature of the cooking zone is derived from the derived correlation between the transmission of light of the specified wavelength and the temperature of the glass ceramic plate.

REFERENCES:
patent: 4740664 (1988-04-01), Payne et al.
patent: 4851645 (1989-07-01), Wolf et al.
patent: 5170041 (1992-12-01), Amith et al.
patent: 5460451 (1995-10-01), Wadman
Jeryan et al., Journal of the American Ceramic Society, "Optical Method of Measuring Temperature in Hot Glass", Jan. 1972, pp. 71-73.

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