DEVICE FOR VISUALIZING INSIDE OF CONTINUOUS CASTING MOLD, METHOD THEREFOR AND PROGRAM THEREFOR

• Main Authors: OKAZAWA KENSUKE, TSUTSUI KAZUMASA, KISHIDA YUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 15.07.2021
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PERFORMING OPERATIONS; PHYSICS; POWDER METALLURGY; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR; TRANSPORTING

To enable the visualization of the states of a molten steel in a mold of a continuous casting facility.SOLUTION: A visualization device 100 derives heat transfer coefficients α, β and the thickness s of a solidified shell by solving an inverse problem using a temperature Tiob measured by a thermocouple. The visualization device 100 derives the likelihood function of a state vector using the temperature Tiob measured by a thermocouple, a heat flux qi, the heat transfer coefficient βi and the thickness siob as observation data. The visualization device 100 derives the second probability density function of the state vector at a time t by giving the first probability density function of the state vector at the time t and the likelihood function of the state vector at the time t to the algorithm of a filter performing data assimilation. The visualization device 100 derives the most frequent value of the second probability density function as the estimate of the state vector at the time t.SELECTED DRAWING: Figure 1 【課題】連続鋳造設備の鋳型内の溶鋼の状態を可視化することができるようにする。【解決手段】可視化装置１００は、熱電対で測定された温度Ｔiobを用いて逆問題を解くことにより、熱伝達係数α、β、および凝固シェルの厚みｓを導出する。可視化装置１００は、熱電対で測定された温度Ｔiob、熱流束ｑi、熱伝達係数βi、および凝固シェルの厚みｓiobを観測データとして用いて状態ベクトルの尤度関数を導出する。可視化装置１００は、時刻ｔでの状態ベクトルの第１の確率密度関数と、当該時刻ｔでの状態ベクトルの尤度関数とを、データ同化を行うフィルタのアルゴリズムに与えることにより、時刻ｔでの状態ベクトルの第２の確率密度関数を導出する。可視化装置１００は、第２の確率密度関数の最頻値を、時刻ｔでの状態ベクトルの推定値として導出する。【選択図】図１