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Academic literature on the topic 'Capteurs métalliques'
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Journal articles on the topic "Capteurs métalliques"
Pellerin, D., M. Brissaud, G. Grange, D. Noterman, and J. F. Robin. "Modélisation électrique des canalisations métalliques des bâtiments : application aux réseaux de capteurs intelligents." Revue de Physique Appliquée 24, no. 9 (1989): 933–44. http://dx.doi.org/10.1051/rphysap:01989002409093300.
Full textAmari, Aziz, Nezha El Bari, and Benachir Bouchiki. "Contrôle qualité du lait de chèvre par un nez électronique portable basé sur des capteurs à oxydes métalliques semi-conducteurs." Instrumentation Mesure Métrologie 11, no. 1-2 (June 30, 2011): 31–49. http://dx.doi.org/10.3166/i2m.11.1-2.31-49.
Full textMathieu-Scheers, Emilie, Sarra Bouden, Valérie Bertagna, Benoît Cagnon, Fabienne Warmont, Emmanuelle Joigneaux, and Christine Vautrin-Ul. "Capteurs électrochimiques carbonés pour la détection de micropolluants émergents et prioritaires." La Houille Blanche, no. 1 (February 2018): 53–59. http://dx.doi.org/10.1051/lhb/2018008.
Full textPlacko, D., and E. Santander. "Modélisation de capteurs inductifs pour la mesure à travers une paroi métallique amagnétique." Revue de Physique Appliquée 25, no. 7 (1990): 721–35. http://dx.doi.org/10.1051/rphysap:01990002507072100.
Full textBONNEAU, M., F. BELINE, J. Y. DOURMAD, M. HASSOUNA, C. JONDREVILLE, L. LOYON, T. MORVAN, J. M. PAILLAT, Y. RAMONET, and P. ROBIN. "Connaissance du devenir des éléments à risques dans les différentes filières de gestion des effluents porcins." INRAE Productions Animales 21, no. 4 (September 27, 2008): 325–44. http://dx.doi.org/10.20870/productions-animales.2008.21.4.3409.
Full textDissertations / Theses on the topic "Capteurs métalliques"
Oudot, Evan. "Oxydes métalliques pour la passivation de l'interface Si / SiO2 des capteurs d'images CMOS." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT036/document.
Full textSince the late 2000s back-side-illuminated CMOS image sensors have taken precedence over traditional Front-Side Illuminated sensors. This technology has the advantage of simplifying the optical path to the photodiode and particularly increases the quantum efficiency. At the same time, like CMOS technologies, this change allows the reduction of the size of the pixels in the plane. However, this change causes the appearance of a new interface on the back side of the pixels. The presence of an additional interface implies a new source of dark current that must be reduced to the maximum to maintain high performance. This interface has to be passivated to minimize the generation of parasitic electrons. Two means exist, the chemical passivation which consists of reducing the density of defects at the interface and the field effect passivation which consist of introducing charges into the passivation layer. To do this, this thesis work is part of the development of a SiO2 / HfO2 or Al2O3 / Ta2O5 stack whose metal oxides are deposited by ALD and PEALD. The purpose of this work is to understand the origin and the nature of defects in metal oxides in order to improve the passivation properties of the stack. The nature of the layers used, the deposition parameters and the impact of the annealing are studied in detail from the COCOS measurement technique making it possible to extract the density of interface defects and the total charge of the stack. Other complementary physicochemical characterization techniques such as infrared measurements have been used to identify chemical changes in the stack
Girard-Desprolet, Romain. "Filtrage spectral plasmonique à base de nanostructures métalliques adaptées aux capteurs d'image CMOS." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT053/document.
Full textImage sensors have experienced a renewed interest with the prominent market growth of wireless communication, together with a diversification of functionalities. In particular, a recent application known as Ambient Light Sensing (ALS) has emerged for a smarter screen backlight management of display-based handheld devices. Technological progress has led to the fabrication of thinner handsets, which imposes a severe constraint on light sensors' heights. This thickness reduction can be achieved with the use of an innovative, thinnest and entirely on-chip spectral filter. In this work, we present the investigation and the demonstration of plasmonic filters aimed for commercial ALS products. The most-efficient filtering structures are identified with strong emphasis on the stability with respect to the light angle of incidence and polarization state. Integration schemes are proposed according to CMOS compatibility and wafer-scale fabrication concerns. Plasmon resonances are studied to reach optimal optical properties and a dedicated methodology was used to propose optimized ALS performance based on actual customers' specifications. The robustness of plasmonic filters to process dispersions is addressed through the identification and the simulation of typical 300 mm fabrication inaccuracies and defects. In the light of these studies, an experimental demonstration of ALS plasmonic filters is performed with the development of a wafer-level integration and with the characterization and performance evaluation of the fabricated structures to validate the plasmonic solution
Bahloul, Fadila. "Etude expérimentale de l'interaction sable - structure et comportement en extraction d'inclusions métalliques." Lyon, INSA, 1990. http://www.theses.fr/1990ISAL0067.
Full textThis study contributes to a better understanding of the local behaviour and the interaction between a inclusion and a cohesion less material. The physical phenomenon governing this interaction is the friction. A chapter on existing literature describes theoretical and practical aspects of the friction modelling and factors influencing the latter such as dilatancy. The laboratory tests are carried out in several models of different dimensions. - Plane friction tests with standard shear apparatus are used to define a friction angle sand/plate. Influence of the surface of contact is revealed. - Pull out tests of the corner iron of different dimensions are carried out in reduced model. Friction coefficient is defined and calculated. Several factors influencing the latter such as the nature, and method of placing the inclusion are examined. An analysis of the start of the pull out tests is done for tests realized in this model. Pressure cells have been positioned around the inclusion to study the dilatancy. - Pull out tests of cylindrical bar are carried out in another reduced model. The dilatancy is controlled this case by the vertical displacement variation. All results are compared to the ether models
Lê, Minh-Quang. "Conception et modélisation de capteurs électromagnetiques : application à la mesure simultanée des propriétés physiques et géométriques des pièces métalliques." Paris 11, 1995. http://www.theses.fr/1995PA112279.
Full textJasmin, Jean-Philippe. "Élaboration de capteurs nanostructurés pour la détection de polluants métalliques à l'état de traces." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLE010/document.
Full textThis work focuses on screen-printed electrodes functionalization by electrografting of diazonium salts in order to be used as metallic micropollutants sensors. Two kind of functionalization were treated; the functionalization by organic groups selective of metal ions owing selective sensors and, the nanostructuration with gold nanoparticles to increase the analytical performances of the sensors. The first part of the work deals with the functionalization of screen-printed electrodes with macrocyclic ligands, chosen from a bibliographic study, for their respective affinities for Cu (II), Pb (II) and UO2 (VI). Covalent grafting of this macrocycles on screen-printed electrodes leads to potentially selective sensors. The analytical performances of these sensors as well as the influence of many interference species on the detection were studied.A second part handles with methods for the nanostructuration of screen-printed electrodes by covalent immobilization of naked or functionalized gold nanoparticles. Two types of gold nanoparticles, with different characteristics have been studied. The nature, the size and the surface state of the gold nanoparticles were found to be key parameters that influence on the nanostructuration of screen-printed electrodes and consequently on their electrochemical properties. The last part of this work concerns the development of a detection protocol for metallic micropollutants with the nanostructured and functionalized screen-printed. The analytical performances have been studied and compared with systems without nanoparticles in order to highlight the contribution of the gold nanoparticles on the performance of the electrodes
Degioanni, Simon. "Nanostructures métalliques et effets de composition des verres silicatés pour les capteurs à fibres optiques." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10101/document.
Full textThe purpose of this thesis is to study composition variations of silicate glasses or the integration of metallic nanostructures that may be relevant for distributed fiber optic sensors (FOS). These sensors use optical fiber cores mainly composed of silica (SiO2) to probe temperature or strain on multi-kilometer route fibers. To measure these effects, Raman and Brillouin backscattering in optical fibers are used, Raman scattering being sensitive to temperature variations and Brillouin scattering to temperature and strain variations. Raman scattering intensity may be enhanced in conjunction with noble metal nanostructures via the SERS effect (Surface Enhanced Raman Scattering) which involves surface plasmon resonance (SPR), a collective oscillation of free electrons at the metal surface generating a large amplification of the local electric field. The integration of metallic nanostructures in optical fibers could increase Raman backscattering intensity and improve FOS performance (sensitivity, integration time…). A study on model samples has been performed with SERS substrates consisting of gold nanostructures and coated with a sol-gel oxide deposition (TiO2, SiO2). The obtained SERS results are used to predict the contribution of metallic nanostructures in Raman distributed temperature FOS
Haon, Cédric. "Etude des relations entre caractéristiques structurales et dissipation en vibration dans les verres métalliques massifs : application à des senseurs inertiels." Lyon, INSA, 2006. http://theses.insa-lyon.fr/publication/2006ISAL0076/these.pdf.
Full textThe aims of this work were to evaluate the damping of the mechanical energy in the bulk metallic glasses using the model alloy Pd40Ni10Cu30P20 and to analyze the damping mechanisms in the kilohertz frequencies range at ambient temperature for a mechanical resonator with simplified shape where the characteristic length is about 1 mm. In these practical conditions, energy dissipation is related to thermoelasticity. This phenomenon is due to the heat transfer in order to equilibrate local temperature changes generated by the elastic deformation during vibration. The study of amorphous metallic alloys as mechanical resonators involved manufacturing of specific parts ; this preliminary stage has been carried out by gravitational casting in an adapted mould followed by thermal treatments and machining / polishing. The quality factor, which is the characteristic parameter of the damping, has been measured from resonant experiments using the logarithmic decrement of the free vibrations for the disc-rod shaped pieces. The annealing around the glass transition temperature led to increase the quality factor from 0,3 million to 0,8 million. This improvement is not directly related to a physical transformation of the glass occurring during the thermal treatments : the structural relaxation, which has been characterized using different methods (DTA, dilatometry, mechanical spectroscopy). The modifications of the vibratory properties are attributed to the relaxation of residual stresses which are formed during the fast cooling essential to the glass formation. However, after aging, theoretical thermoelastic limit is not reached and the final damping mechanism is still to be identified
Dréan, Jérôme. "Mesures électromagnétiques en champ proche pour la caractérisation des materiaux non métalliques et des systèmes rayonnants." Rennes, INSA, 2007. http://www.theses.fr/2007ISAR0011.
Full textThe recent growth in wireless communications has raised the need for developing new means of electromagnetic field measurements in the near field domain. Modulated Scattering Techniques (MST) are good candidates for such kind of measurements. We have first started by studying and developing an elementary dipole supplied through electrical wires for locally disturbing the electromagnetic field. We have created a retina and we have proposed and validated an acquisition procedure for measuring the field of the radiating elements in the near field domain with two systems. Finally, from this preliminary work, we have developed a pre-industrial system dedicated to the characterization of non metallic materials in the near field domain. We developed new measurement and calibration techniques for detecting defects in materials and continuously measuring their density distribution. Functional tests of this system have been performed with various materials. Currently, the system is really mature for industrial usage in the X band domain and may also be easily shifted to Ku and Ka band
Othman, Mehdi. "Effet des nanograins métalliques sur les propriétés de détection des capteurs de gaz à base de WO3." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4360.
Full textThis work focuses on improving the performance of WO3-based gas sensors with particular attention to the effect of metal additives on device sensing properties. The goal is to assess and improve the performance of sensors under different oxidizing and reducing gases. Two approaches have been taken: a theoretical approach which consists in the modeling of gas sensor resistance and an experimental approach which consists in modifying the surface of the sensitive layers by metal nanograins. The developed model allowed us to highlight the various intrinsic and structural parameters of the sensitive layer, in which it is possible to act to improve the performance of the sensors. The second approach is to add metallic nanograins. This method shows high efficiency on the sensor performance. Indeed, the results obtained with the gold nanoparticles show improved response, response and recovery times, and the time stabilization under ozone. It is the same for the additions of silver and palladium nanoparticles, even if the results are different. In the case of adding cobalt nanoparticles, a singular phenomenon is manifested by the sensor responses inversion in some cases. This property can be exploited for the selective detection of different gases, with the same sensitive layer modified by the addition of very small quantities of material
Menini, Philippe. "Du capteur de gaz à oxydes métalliques vers les nez électroniques sans fil." Habilitation à diriger des recherches, Université Paul Sabatier - Toulouse III, 2011. http://tel.archives-ouvertes.fr/tel-00697471.
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