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Low-cost thermal scanner image enhancement by merging thermal and visual data

100%

Olbrycht R. , Militowski S.

2015

tom Vol. 61, No. 6

184--186

This paper demonstrates the application of different image processing techniques to process high resolution visual images and merge it with low resolution thermograms to improve its level of detail. The same idea is applied in commercially available thermal cameras (e.g. FLIR with MSX® technology). Low resolution thermograms considered in this paper were obtained from a thermal scanner with point infrared detector (Fig. 1) sensitive to long wavelength infrared spectral range. The proposed algorithms are Laplacian, Sobel operator, embossing and Gaussian differential blur (described in section 3). The authors processed 6 different thermograms to qualitatively assess obtained results. It was done in a statistical manner through a survey and revealed that both Sobel operator and embossing provided the most clear, detailed and unambiguous results (Fig. 5). Such algorithms may be applied for processing more channels in a multispectral, cost-effective system.

Distributed temperature sensing in optical fibers based on Raman scattering: demodulation algorithms

100%

Shatarah I. S. M. , Olbrycht R.

tom Vol. 63, No. 2

45--47

Distributed temperature sensing systems (DTS) has improved over years thanks to the improvements in configurations, components and demodulation calculating algorithms. The demodulation algorithms have been improved depending on the application and the environment, in which the fiber is installed, in order to obtain accurate measurements of temperature and distance. This study discusses the conventional calculating methods and proposed algorithms for different configurations for DTS systems.

Ilościowe aspekty zastosowania termowizji w podczerwieni w hutnictwie

61%

Wittchen W. , Borecki M. , Więcek B. , Pacholski K. , Olbrycht R. , Strąkowski R.

tom R. 59, nr 9

916--919

Przedstawiono możliwości wykorzystania techniki termowizyjnej w hutnictwie żelaza i stali jako bezinwazyjną metodę pomiarową służącą do badania rozkładu pola temperaturowego na zewnętrznej powierzchni monitorowanego obiektu. Zaprezentowano wybrane przykłady wykorzystania kamery termowizyjnej w aplikacjach hutniczych jako narzędzia umożliwiającego kontrolę stanu termalnego urządzeń oraz ostrzegania przed awariami jak również badanie procesów technologicznych. Podkreślono nieinwazyjny charakter badań.

Thermovision has a wide range of applications in iron and steel industry, where on the basis of the obtained results, researches and analysis, it is possible to evaluate the thermal state of a device, to control the production cycle, to verify technological procedures and to support processes of physical and numerical simulation. With using an infrared camera and appropriate software dedicated for the analysis of thermal images, we have the possibility to detect spots with the lowest and highest temperature on the surface of the examined object and determining the real-time temperature distrbution along a specified line, area or point. This method allows creating a qualitative and quantitative analysis. Considering the fact, that in the iron and steel metallurgy many processes consisting of great heat removal are realized, thermovision plays an important role in control of the state of devices and technological processes. In many cases, infrared cameras or scanners are installed on the production lines in order to monitor the production cycle e.g. systems of slag detection during draining steel from a metallurgical furnace to a ladle or infrared scanners used during the plate rolling process, where maintaining the temperature in a given scope is obligatory. The presented problems do not cover all possibilities of thermovision technique in iron and steel metallurgy; they only show selected aspects and examples of its typical applications.