A nondestructive method for diagnosis of insulated building walls using infrared thermography in real situation

Mohamed H. A. Larbi Youcef; Atef Mazioud; Pierre Bremond; Laurent Ibos; Yves Candau; Michel Piro; Alain Filloux

doi:10.1117/12.776850

17 March 2008 A nondestructive method for diagnosis of insulated building walls using infrared thermography in real situation

Mohamed H. A. Larbi Youcef, Atef Mazioud, Pierre Bremond, Laurent Ibos, Yves Candau, Michel Piro, Alain Filloux

Author Affiliations +

Proceedings Volume 6939, Thermosense XXX; 69390V (2008) https://doi.org/10.1117/12.776850
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

In order to provide a method to control conformity of insulation of buildings after restoration, Protomeres project was launched under Prebat 2005 program. This work deals with the development of an experimental protocol for the diagnostic of multi-layered insulated building walls. In a previous study, a test bench was set up in order to measure front and back side temperatures of standard panels compounded of 1cm of plaster and various thicknesses of polystyrene. The panels considered have insulation thicknesses of 2, 6 and 10cm. In the present work, the panels are fixed on walls in laboratory to test real situations in constructions. The front side is painted in standardized black color and heated by two halogen lamps of 500W. A CEDIP Jade Long wave infrared camera and thermocouples are used to carry out temperature measurements during an exposure time and subsequent cooling. In a second time, a one dimensional model based on thermal quadruples and Laplace transforms was developed under Matlab environment. This model simulates a three-layered wall with a blade of air between polystyrene and concrete. Finally, a method of identification of physical parameters is implemented by performing least square minimization based on Levenberg-Marquardt method. The experimental measurements are compared to theoretical results and by minimization we obtain thermal conductivity and diffusivity as well as thickness of the two layers.

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Mohamed H. A. Larbi Youcef, Atef Mazioud, Pierre Bremond, Laurent Ibos, Yves Candau, Michel Piro, and Alain Filloux "A nondestructive method for diagnosis of insulated building walls using infrared thermography in real situation", Proc. SPIE 6939, Thermosense XXX, 69390V (17 March 2008); https://doi.org/10.1117/12.776850

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