Methods for indirect measurements of the emissivity of tungsten and iron-carbon alloys

The purpose of the article is to increase accuracy and reliability optical thermometry, including two-colour compensative thermometry with a priori averaged adjustment. equation nonlinearity emissivity spectral distribution was previously obtained. connects coefficient on middle wave operating range value at one boundary waves via 3 one-colour radiation temperatures. Based equation, linear two-range parabolic methods for indirect measurements proposed. results determination are used correct adjustment thermometry.
 method excludes methodical error temperature distributions emissivity. For tungsten iron-carbon alloys, adjusted using does not exceed 0.52%. At same time, errors ratio energy pyrometry reach 3.19 6.07–8.42%. With further hypothetical by 2 times, increases from 0.52 1.02%. Both values permissible in ferrous metallurgy.
 based inversion distribution. means that changes its sign. In case tungsten, when ranges correctly chosen, corrected reference makes up 0.06%.
 essentially nonlinear emissivity, can be described polynomial 2-nd order. This approximation typical metals their alloys. distribution, example, 1.24 times less than method.