Method for the contactless, emissivity-independent radiation measurement of the temperature of an object and device for carrying out the method

摘要

A method and a device for the contactless, emissivity-independent radiation measurement of the temperature T of a natural or artificial object is provided, in which the radiation measurement is carried out in two or more limited spectral regions in which the transmittance tau of the atmosphere is at least approximately equal to one. In order to determine the temperature T and/or the emissivity epsilon of the object, a radiance curve which passes through the measured intensities is calculated for the intensities measured in a single measurement operation in the various spectral regions. For this purpose, iterative calculation is used with the aid of Planck's Radiation Law to calculate this radiance curve in such a way that it is the sum of the radiance of the object (with the temperature TObj and the emissivity epsilon ) and the radiance of the surroundings (with the temperature TUmg), reflected at the object (with the reflectance of the object).