Being the state evaluation device of the cast piece inside the mold which evaluates the state of the cast piece inside the mold on the basis of

摘要

PROBLEM TO BE SOLVED: To grasp and evaluate the temporal change of the state of a cast slab in a mold based on the temperature information measured by a thermocouple embedded in the mold. ;SOLUTION: A state evaluating device comprises an inverse problem analysis unit 101 for obtaining the heat flux on an operation surface of the mold by the inverse problem analysis, an attractor preparation unit 102 for preparing a re-formed attractor having the predetermined dimension from the heat flux on the operation surface of the mold obtained by the inverse problem analysis unit 101, and a state evaluation unit 104 which obtains the ratio that vicinity points on the re-formed attractor present around the point at the reference time on the re-formed attractor prepared by the attractor preparation unit 102 are present around the points after the elapse of the predetermined time from the reference time and which evaluates the state based on the ratio.;COPYRIGHT: (C)2003,JPO