Pyrometer for temperature measurement of selective objects of unknown and variable emissivity

Abstract

Abstract:An active multiband pyrometer for non-contact temperature measurement of objects of unknown and spectrally-dependent emissivity was developed. It enables temperature measurement of the objects of temperature within 500C-1200C range with a speed up to 200 Hz. The pyrometer consists of a source of infrared radiation that emits radiation on the object under measurement and a receiver that measures radiation reflected and emitted by the object into four narrow spectral bands. Tests show that the developed pyrometer enables temperature measurement of real selective objects with the standard uncertainty equal to 1 % of the output temperature in its temperature measurement range.

Comparison between multiwavelength infrared and visible pyrometry: Application to metals

“…For the fast phenomena where emissivity and temperature simultaneously evolve, the multispectral methods seem to be adapted, in particular in the fields of combustion, welding, and the shock process [44][45][46][47][48][49][50][51][52][53][54][55][56][57].…”

Experimental verification of a multiband system for non-contact temperature measurements

“…One ofthe most important problems in such measurement is the unknown emissivity of the measured body that degrades measurement accuracy, so research is being done on systems, which give results independent ofemissivity value [2][3][4].…”