MONITORING METHOD OF COMBUSTION IN BOILER FURNACE

摘要

PURPOSE:To contrive to save labor for monitoring operation by a method wherein the burning state in a combustion furnace is detected by an image-sensor a plurality of times and the frequency of occurrence of detection signals having a predetermined brightness within a predetermined period of time is counted in order to monitor the state in the furnace based upon the counted value. CONSTITUTION:An industrial television camera 4, for example, is mounted on the wall within the furnace 2 in order to monitor the combustion state in the furnace 2 of a boiler. Video signals 5 from the industrial television camera 4 are obtained through an A/D converter 6 by an electronic computer 8 in order to obtain the sum of the parts which are equal to one another between every picture by means of an integral function 11. Next, the mean value of the video signals is calculated at a mean value calculating function 12 so as to obtain a mean video signal, which is divided into partial pictures again in order to compare each partial picture with the set values 15 corresponding to the pre-set gradation. When the gradation of partial pictures exceeds the set value 15 in the comparison, the positional distribution of subject partial pictures is calculated in order to output the treatment result thereto to an output unit 10.