A NEW MODEL OF RADIATIVE IMAGE FORMATION USED IN VISUALIZATION OF 3-D TEMPERATURE DISTRIBUTIONS IN LARGE-SCALE FURNACES

Abstract

Abstract Since it is difficult to calibrate the absolute radiative energy information from any digital image data, a new model is proposed by which the temperature distributions in furnaces are no longer related with the absolute radiative energy images, but with a sort of temperature image. The temperature images are obtained through using the so-called monochromatic-reference method, described in detail. It is shown that the new model has its objectivity in reflecting the temperature distributions in furnaces, and does not change significantly with the aperture or shutter speed of the camera used. The easier calibration for the temperature than for absolute radiative energy makes this treatment more applicable.