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Artykuły w czasopismach na temat "Mesure de température par thermographie infrarouge"
Forget, S., S. Chénais, F. Druon, F. Balembois i P. Georges. "Mesure directe de la distribution de température dans un cristal laser par thermographie infrarouge". Journal de Physique IV (Proceedings) 119 (listopad 2004): 183–84. http://dx.doi.org/10.1051/jp4:2004119048.
Pełny tekst źródłaRamond, Laurianne, Jean-Christophe Batsale i Claire Gobbé. "Mesure de coefficient d'échange thermique en milieux hétérogènes par thermographie infrarouge application d'un modèle à deux températures". International Journal of Thermal Sciences 38, nr 3 (marzec 1999): 250–57. http://dx.doi.org/10.1016/s1290-0729(99)80088-x.
Pełny tekst źródłaSaint-Blanquet, C., i R. Alnet. "Mesure par thermographie infrarouge de la conductivité thermique longitudinale de plaques minces homogènes ou composites". Revue de Physique Appliquée 20, nr 8 (1985): 621–27. http://dx.doi.org/10.1051/rphysap:01985002008062100.
Pełny tekst źródłaJoly, L. M., B. Giraudeau, M. Monchi i A. M. Oswald. "La mesure de la température corporelle par thermomètre tympanique infrarouge est-elle reproductible ?" Annales Françaises d'Anesthésie et de Réanimation 20, nr 10 (grudzień 2001): 833–37. http://dx.doi.org/10.1016/s0750-7658(01)00507-x.
Pełny tekst źródłaAbid, C., F. Papini i A. Ropke. "L'intermittence spatio-temporelle d'un écoulement cylindrique dans un conduit horizontal : détermination du champ de température externe par thermographie infrarouge et étude de comportement". Journal de Physique III 3, nr 2 (luty 1993): 255–66. http://dx.doi.org/10.1051/jp3:1993130.
Pełny tekst źródłaAbid, C., F. Papini, A. Ropke i D. Veyret. "Etude de la convection mixte dans un conduit cylindrique. Approches analytique/numérique et détermination expérimentale de la température de paroi par thermographie infrarouge". International Journal of Heat and Mass Transfer 37, nr 1 (styczeń 1994): 91–101. http://dx.doi.org/10.1016/0017-9310(94)90164-3.
Pełny tekst źródłaSandoval Torres, Sadoth, Wahbi Jomaa, Françoise Marc i Jean-Rodolphe Puiggali. "Étude des altérations de la couleur du bois de Chêne lors du séchage sous vide discontinu". Madera y Bosques 22, nr 2 (19.09.2016): 119. http://dx.doi.org/10.21829/myb.2016.2221329.
Pełny tekst źródłaRozprawy doktorskie na temat "Mesure de température par thermographie infrarouge"
Reungoat, David. "Analyse de la température à l'interface d'une garniture mécanique par mesure par thermographie infrarouge". Poitiers, 1994. http://www.theses.fr/1994POIT2355.
Pełny tekst źródłaLegrand, Anne-Claire. "Thermographie multispectrale haute et basse température : application au contrôle non destructif". Dijon, 2002. http://www.theses.fr/2002DIJOS014.
Pełny tekst źródłaHenry, Robert. "Étude du fonctionnement d'un dégivreur électrique : modélisation et mesure en soufflerie givrante de température pariétale par thermographie infrarouge". Clermont-Ferrand 2, 1989. http://www.theses.fr/1989CLF21190.
Pełny tekst źródłaGilblas, Remi. "Mesure de champs de températures vraies par thermo-réflectométrie proche infrarouge". Thesis, Toulouse, INSA, 2012. http://www.theses.fr/2012ISAT0012/document.
Pełny tekst źródłaTrue temperature field measurement is a key parameter for the optimization and the control of industrial processes. Current systems present limitations, especially on heterogeneous surfaces and/or in dynamical conditions involving the surface's variation. These restrictions are due to the ignorance of the surface's emissivity, which is a complex function of many physical quantities (temperature, wavelength, roughness, direction of detection). This thesis presents the complete development of a new method of true temperature field measurement, called Thermoreflectometry, applicable on any kind of opaque material, in the range [300-1000]°C. It allows the on-line measurement of emissivity by mixing a step of classical THERMOGRAPHY with a step of laser REFLECTOMETRY. The approach of this work is, first, the critical analysis of the method and its influence quantities, and then the optimal dimensionment of the components by simulation studies. Thirdly, a prototype is built and its defaults are characterized, following a CAMERA-based point of view, and the possible corrections are implemented. Finally, the experimental performances are estimated on some complex heterogeneous thermal scenes which emphasize the prototype's precision for all the tested samples
Groz, Marie-Marthe. "Reconstruction 3D de sources de chaleur volumiques à partir des champs de température de surface mesurés par thermographie InfraRouge". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0135.
Pełny tekst źródłaNon Destructive Testing (N.D.T.) of materials and structures is a very important industrial issue in the fields of transport, aeronautics and space and in the medical domain. Active infrared thermography is a N.D.T. method that consists in providing an external excitation to cause an elevation of temperature field in the material and then to evaluate the resulting temperature field at the surface. However, thermal exciters used (flash lamps, halogen, lasers) act only on the surface of the sample. Several energy conversion systems can on the other hand lead to the generation of volumetric sources: the phenomena of thermo-acoustic, thermo-induction, thermomechanic or thermochemistry can be cited. For example, 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 first step for the quantification of parameters responsible of the heating. Characterizing a heat source means reconstructing its geometry and the power it generates. For example, a defect in a structure and / or the viscoelasticity of a material can be detected and quantified by this technique if it acts directly on temperature field. However, identification of volumetric heat sources from surface temperature fields is a mathematical ill-posed problem. The diffusive nature of the temperature is the main cause. In this work, the 3D reconstruction of the volumetric heat sources from the resulting surface temperature field, measured by InfraRed, is studied. First, an analysis of the physical problem enables to specify the limits of the reconstruction. In particular, a criterion on achievable spatial resolution is defined and a reconstruction limitation for in-depth sources is highlighted. Then, a probabilistic approach for the reconstruction is proposed and compared to existing inverse methods. The computation time and noise sensitivity are studied for each of these methods. Numerical and experimental applications will thus be presented to illustrate the results
Daviot, Ronan. "Etude des champs de flux thermique sur les composants faisant face au plasma dans un tokamak à partir de mesures de température par thermographie infrarouge". Phd thesis, Ecole Centrale Paris, 2010. http://tel.archives-ouvertes.fr/tel-00534809.
Pełny tekst źródłaGilblas, Rémi. "Mesure de champs de températures vraies par thermoréflectométrie proche infrarouge". Phd thesis, INSA de Toulouse, 2012. http://tel.archives-ouvertes.fr/tel-00797425.
Pełny tekst źródłaLacourarie, Fiona. "Caractérisation thermique et lumineuse de diodes électroluminescentes en charge par méthodes locales non intrusives : influence du luminophore". Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2015. http://www.theses.fr/2015EMAC0003/document.
Pełny tekst źródłaThe high brightness LED market is constantly growing last twenty years. The lighting market is changing as needs have changed: we would like, for example, reduce power consumption, or have more flexible lighting (color, lighting cycle, dimensions ...). High brightness LEDs help provide solutions where others are lighting defects. A comparative study is conducted between the LEDs and other lighting sources.The operation of a high brightness LED emitting white light is explained with the description of each element: chip, substrate, the PAD and optics. Then the different methods of obtaining white light with LEDs are compared: several chips, a chip with one or more phosphors, or PRS-LED method. The phosphor has a significant optical role and an important thermal role. After being excited by the light emitted from the chip, it re-emits light in a greater wavelength. The effectiveness of this process depends on many parameters, such as the implementation of the phosphor, or the type of phosphor used. The study and characterization of optical and thermal properties are made for commercial LEDs, composed of a single chip emitting blue light with and without yellow phosphor. To master the maximum factors, we conducted a study and design of the printed circuit board (PCB) on which will be implanted our LEDs. In order to evaluate the materials constituting the LEDs, analyzes made at scanning electron microscope, and by microprobe were conducted. This work has revealed in particular the position of the p-n junction in the chip, and the composition of the phosphor layer of two different types. Moreover, to improve our understanding, a comparative study will be conducted on three yellow phosphors. Then the two types of LEDs, bare chip and chip with phosphor, were tested in order to obtain the luminous flux and efficiency of LEDs. The optical characterization has led us to create a bench for spectral radiance over a small portion of the chip. Furthermore, we are interested in the junction temperature of the bare chip, which we measure by various methods, including infrared thermography. For this, the emissivity was estimated for the bare chip and the chip with phosphor. Then we also compare these different methods to calculate the thermal resistance Rth j-PAD between the junction and the PAD. The mesh of conductive wires, implanted on the surface of the chip, is electrically modeled. The study, which is composed of three progressive levels of modeling, provides an understanding of distribution of the electric current through the junction, and thus to understand the distribution of the light flow and temperature at the surface of the chip. Afterwards, an optical-thermal model describes the phenomena present at the junction of a bare chip: converting electrical power into blue light and heat, and heat transfer. We complete this first model for a model of a chip with the phosphor. This model takes into account the photo-conversion of the phosphor with the calculation of the luminous flux at the output of the phosphor and the calculation of the heat due to the photo-conversion. The resolution of this model allows us to obtain the junction temperature of a chip with phosphor. The model of energy conservation is also verified. The optical-thermal model is applied to a surface temperature mapping in order to obtain a mapping of the junction temperature. These maps are combined with pictures of infrared thermography and radiance
Mergui, Mohamed. "Mesure de contraintes dynamiques par thermographie infrarouge". Lyon, INSA, 1995. http://www.theses.fr/1995ISAL0093.
Pełny tekst źródłaIn order to generate the validity of the measurements by infrared camera, it is necessary to know some specific parameters, in particular: -spatial resolution, -thermal resolution, -uniformity of response in the measurement field. This_ thesis approaches the problems of the use of infrared thermography, in order to precise its potentialities in dynamic stress measurement. A new remote stress measurement method has been developed this method , based on thermoelasticity phenomena is usually simpler than the direct method using strain gauges; this latter technique , however, has allowed us to validate our results. New signal and image processing techniques bead to a mapping of stresses on any structure subject to a periodic strain. Infrared thermography is very suitable in the case of stress concentration. The thermal resolution attained after thermosignal processing is of the order of 10-3°c , even when the camera background noise is of the order 10-1 °c
Loarer, Thierry. "Mesure de température de surface par effet photothermique modulé ou impulsionnel". Châtenay-Malabry, Ecole centrale de Paris, 1989. http://www.theses.fr/1989ECAP0114.
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