Patent ID: 6799137
Filing Date: 2004-09-28
Classification: A61B,G01J,G01K

Abstract:
A method of measuring a temperature of a target medium undergoing processing in a gaseous medium, the target and gaseous mediums emitting electromagnetic radiations related to their temperatures, the method comprising:sensing the electromagnetic radiations emitted by the target medium and the gaseous medium; generating a first sensor signal value indicative of a sum of the electromagnetic radiations emitted by the target medium and the gaseous medium; generating a second sensor signal value indicative of an amount of the electromagnetic radiation emitted by the gaseous medium; empirically determining a value K relating a set of predetermined target medium temperatures to an associated set of first and second sensor signal values; determining an amount of the electromagnetic radiation emitted by the target medium by subtracting K times the second sensor signal value from the first sensor signal value; and calculating the amount of the electromagnetic radiation emitted by the target medium to determine the temperature of the target medium.