3D reconstruction of thermal volumetric sources from surface temperature fields measured by infrared thermography
Communication avec acte
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 in 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 thermoacoustics, 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.
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Three-Dimensional Reconstruction of Thermal Volumetric Sources from Surface Temperature Fields Measured by Infrared Thermography Article dans une revue avec comité de lecturePRADERE, Christophe; GROZ, Marie-Marthe; ABISSET-CHAVANNE, Emmanuelle; MEZIANE, Anissa; SOMMIER, Alain (MDPI, 2019)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 ...
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; CHULKOW, Arsenii; BATTAGLIA, Jean-Luc; BATSALE, Jean-Christophe; PRADERE, Christophe; CHEVALIER, Stéphane (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 ...
Multiscale aspects of the response of a temperature field to a pulsed laser or a periodic laser spot: some applications for IR thermography for non destructive evaluation, terahertz tomography, super-resolution, and microscale heat transfer Communication avec acteBATSALE, Jean-Christophe; ABISSET-CHAVANNE, Emmanuelle; ACHCHAQ, Fouzia; AOUALI, Abderezak; CHEVALIER, Stéphane; GROZ, Marie-Marthe; MAIRE, Jeremie; SOMMIER, Alain (SPIE, 2023-06-12)The study of the response of a temperature field (recorded from IR cameras) to a laser spot heating is increasingly used for NDE (Non Destructive Evaluation) applications. The most classical type of application is to use ...
Article dans une revue avec comité de lectureAOUALI, Abderezak; SOMMIER, Alain; ABISSET-CHAVANNE, Emmanuelle; BATSALE, Jean-Christophe; PRADERE, Christophe; CHEVALIER, Stéphane (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 ...