Three-Dimensional Reconstruction of Thermal Volumetric Sources from Surface Temperature Fields Measured by Infrared Thermography
Article dans une revue avec comité de lecture
Non-destructive testing (NDT) of materials and structures is a very important industrial issue in the fields of transport, aeronautics and space as well as in the medical domain. Active infrared thermography is an NDT method that consists of providing an external excitation to cause an elevation of the temperature field in the material, consequently allowing evaluation of the resulting temperature field at the surface. However, thermal exciters that are used (flash lamps, halogen, lasers) act only on the surface of the sample. On the other hand, several energy conversion systems can lead to the generation of volumetric sources; the phenomena of thermo-acoustics, thermo-induction, thermomechanics or thermochemistry can be cited. For instance, ultrasonic waves can generate volumetric heat sources if the material is viscoelastic or if there is a defect. The reconstruction of these sources is the initial process for the quantification of parameters responsible for the heating. Characterizing a heat source means reconstructing its geometry and the supplied power. Identification of volumetric heat sources from surface temperature fields is a mathematically ill-posed problem. The main cause of the issue is the diffusive nature of the temperature. In this work, 3D reconstruction of the volumetric heat sources from the resulting surface temperature field, measured by infrared thermography, is studied. An analysis of the physical problem enables specifying the limits of the reconstruction. In particular, a criterion on the achievable spatial resolution is defined, and a reconstruction limitation for in-depth sources is highlighted.
Showing items related by title, author, creator and subject.
Article dans une revue avec comité de lectureGROZ, Marie-Marthe; ABISSET-CHAVANNE, Emmanuelle; MEZIANE, Anissa; SOMMIER, Alain; PRADERE, Christophe (MDPI, 2020)The domain of non-destructive testing (NDT) or thermal characterization is currently often done by using contactless methods based on the use of an IR camera to monitor the transient temperature response of a system or ...
Article dans une revue avec comité de lectureGROZ, Marie-Marthe; BENSALEM, Mohamed; SOMMIER, Alain; ABISSET-CHAVANNE, Emmanuelle; CHEVALIER, Stéphane; CHULKOW, Arsenii; BATTAGLIA, Jean-Luc; BATSALE, Jean-Christophe; PRADERE, Christophe (MDPI AG, 2020)In this paper, the problem of the quantitative characterization of thermal resistance fields in a multilayer sample is addressed by using the classical front face flash method as the thermal excitation and infrared ...
Article dans une revue avec comité de lectureAOUALI, Abderezak; CHEVALIER, Stéphane; SOMMIER, Alain; ABISSET-CHAVANNE, Emmanuelle; BATSALE, Jean-Christophe; PRADERE, Christophe (Springer Science and Business Media LLC, 2020)AbstractThis work reports a multispectral tomography technique in transmission mode (called 3DITI for 3D Infrared Thermospectroscopic Imaging) based on a middle wavelength infrared (MWIR) focal plane array. This technique ...
Article dans une revue avec comité de lectureBATTAGLIA, Jean Luc; RUFFIO, Emmanuel; KUSIAK, Andrzej; PRADERE, Christophe; ABISSET CHAVANNE, Emmanuelle; CHEVALIER, Stephane; SOMMIER, Alain; BATSALE, Jean-Christophe (Elsevier BV, 2020)The front face photothermal radiometry technique has been improved in order to estimate the thermal conductivity of thin films with better accuracy compared to existing techniques. The experimental pro- cedure is based on ...
Active thermo-reflectometry for absolute temperature measurement by infrared thermography on specular materials Article dans une revue avec comité de lectureLAFARGUE-TALLET, Thomas; VAUCELLE, Romain; CALIOT, Cyril; AOUALI, Abderezak; ABISSET CHAVANNE, Emmanuelle; SOMMIER, Alain; PEIFFER, Raymond; PRADERE, Christophe (Springer Science and Business Media LLC, 2022-05-12)AbstractKnowledge of material emissivity maps and their true temperatures is of great interest for contactless process monitoring and control with infrared cameras when strong heat transfer and temperature change are ...