METHOD AND DEVICE FOR OBSERVING STATE OF BLAST FURNACE TUYERE

摘要

PROBLEM TO BE SOLVED: To provide a method for more easily observing the state of a blast furnace tuyere.SOLUTION: The method includes the steps of: creating a normalized image through geometric transformation to make a normalized circle of the shape profile of a tuyere in a thermal radiation brightness image and polar transforming the normalized image; creating a binarized image through binarization of the normalized image after the polar transformation; creating bright part distribution data which indicate the distribution of the bright parts existing in the binarized image in the radial direction of the normalized circle; calculating the feature quantity data including the element number as feature quantity for defining the number of elements contained in the predetermined range in the radial direction and the position in the radial direction as feature quantity for indicating the largest number of elements in the radial direction, based on the bright part distribution data; and calculating the index for defining the state in the tuyere by setting a two-dimensional coordinate system specified from the element number as feature quantity and the position in the radial direction as feature quantity and by presuming that the set of feature quantity data on a plurality of the thermal radiation brightness images has a distribution in an approximately triangle shape in the coordinate system of the feature quantities.