%0 Journal Article 
%T Modelo de estimación diferencial de la propagación térmica en 3D mediante diferencias finitas
%J Sistemas y Telemática;Vol. 10, No. 21
%D 2012
%@ 16925238
%U http://www.icesi.edu.co/revistas/index.php/sistemas_telematica/article/view/1193
%X In this paper, a new mathematical model based on
finite difference discretization of the Fourier’s 3D heat
propagation model, is shown. From this one, a new
technique is proposed to detect flaws in composite thin
layers, under evaluation by a Pulsed Active Thermography
experiment. The discrete model defined is easily adaptable
to a spatial filter structure, which can be applied to
the infrared sequence of images acquired from that
thermography experiment, to obtain a better contrast
between possible internal flaws and sound regions of
material. The performance of the technique proposed is
evaluated using artificial thermal sequences generated by
ThermoCalc6L, software that is able to compute dynamic
thermal distributions in anisotropic layered solids,
simulating defects and different excitation sets. Results
show that this technique offers a better contrast between
defect and background thermal information, than other
common technique like Differential Absolute Contrast
(DAC), and it runs faster than the classic 3D thermal
filtering method.
Palabras clave
Termografía activa; termografía
pulsada; propagación térmica;
contraste térmico; filtro espacial.
Keywords
Active thermography; pulsed
thermography; thermal
propagation; thermal contrast;
spatial filter.
1
Fecha de recepción: Abril 13 de 2012
Fecha de aceptación: Mayo 14 de 2012
Andrés David Restrepo Girón, MSc
adareg378@gmail.com
Grupo de Investigación en Instrumentación
Electrónica (GIE)
Universidad Santiago de Cali, Colombia
Humberto Loaiza Correa, PhD
humberto.loaiza@correounivalle.edu.co
Grupo de Investigación en Percepción y
Sistemas inteligentes (PSI)
Universidad del Valle, Colombia
Citación: Restrepo, A. & Loaiza, H.(2012). Modelo de estimación diferencial de la propagación térmica en 3D mediante
diferencias finitas. Revista S&T, 10(21), 9-26
Modelo de estimación diferencial de la propagación
térmica en 3D mediante diferencias finitas
A model for differential estimation of 3D thermal
%K FACULTAD DE INGENIERÍA
%K PRODUCCIÓN INTELECTUAL REGISTRADA - UNIVERSIDAD ICESI
%K MODELOS MATEMÁTICOS
%K 3D
%K FOURIER
%~ GOEDOC, SUB GOETTINGEN