Measurement of temperature by radiation pyrometry

摘要

It is desired to measure the true temperature of surfaces of test objects by purely radiation pyrometric means, without the existence of prior information concerning either the emissivity of the surface of the object to be measured, or the space occupied by the object to be measured. Measurements are made over a broad spectrum of the temperature radiation of the surface of the test object by an interferometer arrangement, and are evaluated by a computer by means of a search algorithm to identify regions where the emissivity is independent of or linearly proportional to, wavelength, whereupon temperature can be deduced from the measurement corresponding to such regions. In an expanded variant, an additional auxiliary radiator is used whose radiation reflected from the surface of the object to be measured is jointly evaluated. The invention is particularly suitable for research work or for preliminary investigations for the use of temperature measuring devices in technological processes.