The Assessment of Multispectral Radiation Thermometry Using Linear and Log-Linear Emissivity Models for Steel |
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| Authors: | Chang-Da Wen Yi-Hau Chr |
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| Affiliation: | 1. Department of Mechanical Engineering , National Cheng Kung University , Tainan, Taiwan, Republic of China alexwen@mail.ncku.edu.tw;3. Department of Mechanical Engineering , National Cheng Kung University , Tainan, Taiwan, Republic of China |
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| Abstract: | Experiments were performed to measure the spectral intensity values of a variety of steel samples at 700, 800, and 900 K. The experimental work is coupled with two commonly used emissivity models, linear emissivity models (LEMs) and log-linear emissivity models (LLEs), to examine multispectral radiation thermometry (MRT) on inferring surface temperature. Overall, the first-order LEM and the first-order LLE show the best compensation for different alloys, number of wavelengths, temperatures, and heating time. The results reveal that the better the emissivity model suitably represents real surface emissivity behavior, the more accurate is the inferred temperature by MRT. |
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