Furnace wall surface state judging device for carbonizing chamber of coke oven, method and program for judging surface condition of furnace wall in carbonized chamber of coke oven

摘要

PROBLEM TO BE SOLVED: To realize automatic and accurate determination of an adhesion condition of carbon from a heat image of a furnace wall surface of a carbonization chamber.SOLUTION: Furnace wall surface heat image data after shading compensation is divided into a plurality of blocks, concentration histogram of furnace wall surface heat image data after shading compensation is created for each of the plurality of divided blocks, and a threshold is obtained by the Otsu method from the created concentration histogram. In addition, a block having 2 peaks in the concentration histogram is determined as under spot shaped carbon adhesive state. In a case where there are not 2 peaks in the concentration histogram, in the concentration histogram, a block having 0.7 or more of appearance frequency ratio of pixel having a concentration of threshold or less in the Otsu method is determined as under healthy brick surface state. On the other hand, a block having less than 0.7 of the appearance frequency ratio of pixel having a concentration of threshold or less in the Otsu method is determined to be under a uniform carbon adhesive state.SELECTED DRAWING: Figure 2