辐射测温中光谱发射率的表征描述

实际物体的光谱发射率表现复杂，给辐射测温的深入研究和实际应用带来了很多困难和不确定性，发射率问题即成为了辐射测温研究中的关键点。文章基于光谱发射率的泰勒多项式展开、波长的无量纲参数、弯曲度指数等分析，描述了谱色测温法中光谱发射率的数学表征，建立了窄波段内的光谱发射率通用函数形式。并通过对不同温度下几种金属的实际光谱发射率进行拟合分析，对此给予了实验上的验证，表明了所提出光谱发射率模型具有应用的适用性，该模型是谱色测温方法应用研究的基础。

Analyses of Spectral Emissivity in Radiation Temperature Measurement

The complexity of the spectral emissivity of actual surfaces is the key point in the research and applications of radiation temperature measurement, resulting in the difficulty in the achievement of the temperature measurement. In the present paper, based on the discussions of the Taylor expansion, the non-dimension wavelength and the exponent, the authors describe the mathematical expression of the spectral emissivity of actual surfaces, and establish the general spectral emissivity function. Through the fitting of experimental data of the spectral emissivities of different metals at different temperatures, the applicability of the spectral emissivity function is verified which especially becomes the fundamental in the research of primary spectrum pyrometry.