多波長温度計の開発と亜鉛メッキ合金化炉への適用(温度計測)(<特集>鉄鋼業における最近のセンサ技術)

概要

論文の詳細を見る
The multiwavelength pyrometry problem of inaccuracy in determining the true temperature has been analysed in detail. The results of this analysis and a comparison with numerical simulation results show that a proper calculation method of a temperature and a certain knowledge on the emissivity of the target surface are indispensable to an accurate temperature determination. On the basis of this study a new multiwavelength pyrometer for the use of the galvanneal process is developed with a careful design. In spite of the greately changing characteristics of the target surface emissivity in the galvanneal process, where zinc-coated steel sheet is rapidly annealed to produce desirable intermetallic coated layer and the surface of the zinc layer changes from highly specular reflectivity with emissivity near 0.1 to a nearly diffuse reflectivity with emissivity as high as 0.7, this new pyrometer is effectively applied and the measurement accuracy is confirmed to be ±10% for temperature and ±10% for emissivity by laboratory simulations and on-line tests.
社団法人日本鉄鋼協会の論文
1993-07-01