12 April 2004 Advanced multispectral dynamic thermography as a new tool for inspection of gas-fired furnaces
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Abstract
The main special feature of elaborated method is that the dynamic IR thermography (DIRT) bases on forming of single image consisting of pixels of chosen minimum (IMAX) or maximum (IMAX) value, noted during adequately long sequence of thermograms with total independence to the moment of its (image's) capture. In this way, additive or suppressed interferences of fluctuating character become bypassed. Due to this method thereafter elaborated in classic way such “artificial thermogram” offers the quality impossible to achieve with a classic “one shot” method. Although preliminary, results obtained clearly show great potential of the method. and confirmed the validity in decreasing errors caused by fluctuating disturbances. In the case of process furnaces of gas-fired type and especially of coal-fired, application of presented solutions should result in significant increasing the reliability of IR thermography application. By use of properly chosen optical filters and algorithm, elaborated method offers a new potential attractive to test temperature problems other than in tubes , as for example symmetry and efficiency of the furnace heaters.
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Piotr Pregowski, Grzegorz Goleniewski, Wojciech Komosa, Waldemar Korytkowski, "Advanced multispectral dynamic thermography as a new tool for inspection of gas-fired furnaces", Proc. SPIE 5405, Thermosense XXVI, (12 April 2004); doi: 10.1117/12.546806; https://doi.org/10.1117/12.546806
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