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Author : Franck Vallet
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (494 download)
Download or read book Etude d'un capteur extrinseque de vibrations a fibres optiques written by Franck Vallet and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Franck Vallet
Publisher :
ISBN 13 :
Total Pages : 161 pages
Book Rating : 4.:/5 (799 download)
Download or read book Etude d'un capteur extrinsèque de vibrations à fibres optiques written by Franck Vallet and published by . This book was released on 1997 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CE MEMOIRE, NOUS PRESENTONS UN CAPTEUR EXTRINSEQUE DE VIBRATIONS A FIBRES OPTIQUES DESTINE A ETRE INSTALLE DANS LES CENTRALES HYDROELECTRIQUES POUR PREDIRE L'ETAT D'USURE DE DIVERS ELEMENTS MECANIQUES SUR LES MACHINES TOURNANTES. UNE ANALYSE CRITIQUE DES DIFFERENTES MODULATIONS EMPLOYEES CONDUIT AU CHOIX D'UN CAPTEUR UTILISANT LA MODULATION DE PHASE DU FAIT DE LA GRANDE SENSIBILITE DE MESURE PERMISE. LA TETE DU CAPTEUR PROPOSE COMPREND UN MONTAGE DE TYPE INTERFEROMETRIQUE ORIGINAL DESTINE A PERMETTRE LA MESURE SANS CONTACT DE DEPLACEMENT D'UNE MASSE SISMIQUE SOUMISE A UNE ACCELERATION. UN RESEAU DE DIFFRACTION SOLIDAIRE DE LA MASSE SISMIQUE EST ECLAIRE PAR UN SYSTEME DE FRANGES D'INTERFERENCES PRIMAIRE. SES DEPLACEMENTS PROVOQUENT LE DEFILEMENT DE FRANGES SECONDAIRES DONT LE COMPTAGE FOURNIT L'INFORMATION SUR LA VALEUR ET LA FREQUENCE DE L'ACCELERATION. LA THEORIE RELATIVE A LA MESURE DU DEPLACEMENT PAR PROCEDE INTERFEROMETRIQUE EST PRESENTEE AINSI QUE L'APPLICATION DE CE PRINCIPE A LA MESURE DE VIBRATIONS. LES DISPOSITIFS OPTIQUES, MECANIQUES ET ELECTRONIQUES CONSTITUANT LE CAPTEUR SONT DECRITS ET CARACTERISES EN DETAIL. EN PARTICULIER, L'EMPLOI DE RESEAUX DE DIFFRACTION NON STANDARDS NOUS AMENE A L'ELABORATION D'UN BANC DE FABRICATION PAR HOLOGRAPHIE ET A LA CARACTERISATION DES RESEAUX. PREALABLEMENT A LA MISE EN BOITIER DE LA TETE DU CAPTEUR, LA FREQUENCE PROPRE ET LE COEFFICIENT D'AMORTISSEMENT DU SYSTEME MECANIQUE ETUDIE SONT DETERMINES. LES RESULTATS EXPERIMENTAUX DEMONTRENT QUE LE CAPTEUR FONCTIONNE PARFAITEMENT POUR DES FREQUENCES DE VIBRATIONS AUSSI BASSES QUE 0,2 HZ, LA GAMME DE FREQUENCES MESURABLE ALLANT JUSQU'A 70 HZ. LA LIMITE BASSE EN ACCELERATION DE NOTRE CAPTEUR EST DE 0,03 M/S#2RMS, LA GAMME D'ACCELERATIONS DETECTABLE S'ETENDANT JUSQU'A 10 M/S#2 RMS. FINALEMENT, LE CAPTEUR DEVELOPPE EST COMPACT ET FACILE A METTRE EN UVRE.
Author : Abdelrafik Malki (enseignant-chercheur en électronique).)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (819 download)
Download or read book Capteurs de vibrations mécaniques et de pression à fibre optique written by Abdelrafik Malki (enseignant-chercheur en électronique).) and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L'utilisation des C.F.O. couvre de plus en plus d'importants domaines de mesures. Cette thèse reprend dans la première partie l'état de l'art des C.F.O. Nous avons, dans la partie expérimentale effectué des mesures sur un capteur de vibration à fibre optique par effet de speckle, et avons montré au cours des expériences de l'amélioration du rapport signal signal sur bruit, dans le cas d'un filtrage spatial entre deux fibres multimodes différentes. La modélisation et la mise au point d'un capteur de vibrations, de type accéléromètre à fibre optique, par modulation d'intensité, fondé sur le micro-usinage de silicium ont été réalisées, ainsi qu'un prototype. Nous avons montré la faisabilité technologique d'un tel capteur. Celui-ci peut-être intégré dans un réseau à multiplexage chromatique. Le travail a consité également en la mise au point des interfaces optoélectroniques. Enfin un capteur de pression par couplage entre deux fibres a fait l'objet d'une étude théorique, et des mesures expérimentales. Grâce à la fusion des deux fibres optiques, on a amélioré la reproductibilité et la robustesse du capteur. Ceci ouvre ainsi la voie sur un grand nombre d'applications dans le domaine des composants optiques, tels que les coupleurs variables.
Author : FLORENT.. PIGEON
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (49 download)
Download or read book ETUDE ET REALISATION D'UN CAPTEUR POLARIMETRIQUE DE VIBRATIONS UTILISANT UNE FIBRE OPTIQUE UNIMODALE STANDARD written by FLORENT.. PIGEON and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: UNE ETUDE THEORIQUE ET EXPERIMENTALE DES MODIFICATIONS DE POLARISATION INDUITES DANS UNE FIBRE OPTIQUE UNIMODALE STANDARD SOUMISE A UNE PERTURBATION MECANIQUE. CES RESULTATS ONT ETE UTILISES POUR REALISER UN CAPTEUR DE VIBRATIONS A L'AIDE D'UNE FIBRE OPTIQUE BOBINEE. NOUS DISCUTONS LES CONDITIONS POUR OBTENIR UNE REPONSE LINEAIRE ET UNE BONNE SENSIBILITE. UNE METHODE DE MESURE NON DESTRUCTIVE DU MODULE DE YOUNG D'UNE FIBRE OPTIQUE, AVEC OU SANS SON REVETEMENT DE PROTECTION MECANIQUE, EST PRESENTEE. CETTE METHODE EST NON DESTRUCTIVE ET TRES PRECISE
Author : François Jullien
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (69 download)
Download or read book Etude de faisabilité d'un capteur de température à fibre optique written by François Jullien and published by . This book was released on 1997 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Silvie Dokulilova
Publisher :
ISBN 13 :
Total Pages : 135 pages
Book Rating : 4.:/5 (489 download)
Download or read book Etude et mise en oeuvre d'un capteur de contraintes à fibre optique faiblement modale utilisant le multiplexage de cohérence written by Silvie Dokulilova and published by . This book was released on 1995 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CE MEMOIRE, NOUS PRESENTONS L'ETUDE D'UN CAPTEUR DE CONTRAINTE INTRINSEQUE A FIBRE OPTIQUE. LE CAPTEUR EST CONSTITUE D'UNE FIBRE OPTIQUE MONOMODE SOUDEE A UNE FIBRE OPTIQUE MULTIMODE. LA MESURE EST BASEE SUR LE CHANGEMENT DE LA PHASE DU SIGNAL D'INTERFERENCES ENTRE LES MODES SE PROPAGEANT DANS LA FIBRE MULTIMODE SOUMISE A LA CONTRAINTE. LE MULTIPLEXAGE DE COHERENCE EST UTILISE COMME METHODE DE CODAGE/DECODAGE DU SIGNAL. UNE ANALYSE THEORIQUE DES PROPRIETES D'UN CAPTEUR NON PERTURBE A ETE DEVELOPPEE, AINSI QU'UNE ANALYSE THEORIQUE DE LA REPONSE DU CAPTEUR AUX VARIATIONS DE LA CONTRAINTE ET DE LA TEMPERATURE. UNE SIMULATION NUMERIQUE A PERMIS DE DETERMINER LES PARAMETRES OPTIMAUX DU CAPTEUR A UTILISER DANS L'EXPERIENCE. GRACE A LA SIMULATION, LES RESULTATS EXPERIMENTAUX ONT PU ETRE COMPARES A LA THEORIE. NOUS PRESENTONS LES DONNEES EXPERIMENTALES CONCERNANT LE CAPTEUR NON PERTURBE, LES DONNEES CONCERNANT LE CAPTEUR SOUMIS A UNE CONTRAINTE, ET LES DONNEES RELATIVES AU CAPTEUR EXPOSE AUX VARIATIONS DE LA TEMPERATURE ENVIRONNANTE. UN TRES BON ACCORD ENTRE LES RESULTATS EXPERIMENTAUX ET LES RESULTATS DE LA SIMULATION NUMERIQUE A ETE OBSERVE. LES RESULTATS THEORIQUES ET EXPERIMENTAUX MONTRENT QUE LA SENSIBILITE THERMIQUE DU CAPTEUR EST TRES FAIBLE PAR RAPPORT A SA SENSIBILITE AUX CONTRAINTES. NOUS AVONS OBTENU UN RAPPORT SENSIBILITE THERMIQUE/SENSIBILITE AUX CONTRAINTES INFERIEUR D'UN ORDRE DE GRANDEUR A CELUI DES CAPTEURS UTILISANT DES FIBRES BIREFRINGENTES. DE SURCROIT, LE CAPTEUR PROPOSE DANS CE MEMOIRE PEUT ETRE REALISE D'UNE MANIERE SIMPLE ET PEU COUTEUSE
Author : Nordine Bourzig
Publisher :
ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (993 download)
Download or read book Etude d'un capteur rapide de température par fibre optique written by Nordine Bourzig and published by . This book was released on 2003 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C.G. Wedgwood
Publisher : Elsevier
ISBN 13 : 1483292606
Total Pages : 584 pages
Book Rating : 4.4/5 (832 download)
Download or read book Components and Sub-Assemblies written by C.G. Wedgwood and published by Elsevier. This book was released on 2013-10-22 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Please note this is a Short Discount publication. Access both contact and company information on all 4950 European manufacturers, distributors and agents for 550 electronics components and sub–assembly product classifications throughout West and East Europe in one comprehensive Volume. Applications: • Sourcing of specific product types through local distributors or manufacturers • Location of new regional channels of distribution or identification of new European business partners • Competitor tracking • Sales lead generation Entries include: • Key names executives • Full address, telephone and fax details • Size indications including number of employees • Products • Manufacturers represented and agency status
Author : Sven Boermeester
Publisher :
ISBN 13 : 9781949677072
Total Pages : pages
Book Rating : 4.6/5 (77 download)
Download or read book Innovate Bristol written by Sven Boermeester and published by . This book was released on 2019-12 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovate Bristol highlights and celebrates those companies and individuals that are actively working at building a better tomorrow for all. Innovation Ecosystems thrive through the involvement and support of companies and individuals from all industries, which is why the Innovate series not only focuses on the innovators but also those people whom the Innovation Ecosystem, would not be able to thrive without.
Author : France. Commissariat à l'énergie atomique
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.3/5 ( download)
Download or read book Gas-cooled Nuclear Reactors written by France. Commissariat à l'énergie atomique and published by . This book was released on 2006 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. Pieuchot
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.3/5 (91 download)
Download or read book Seismic Instrumentation written by M. Pieuchot and published by . This book was released on 1984 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stefano Boccaletti
Publisher : A I P Press
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.F/5 ( download)
Download or read book Experimental Chaos written by Stefano Boccaletti and published by A I P Press. This book was released on 2004-12-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th Experimental Chaos Conference again demonstrated the broad spectrum of areas where nonlinear dynamics plays an important role, such as circuits, hydrodynamics, optics, chemistry, fracture dynamics, neuroscience, and cognitive science. Additional contributions outline the trends for development and application of concepts and techniques of nonlinear dynamics.
Author : Roger Balian
Publisher : Springer Science & Business Media
ISBN 13 : 3540454802
Total Pages : 626 pages
Book Rating : 4.5/5 (44 download)
Download or read book From Microphysics to Macrophysics written by Roger Balian and published by Springer Science & Business Media. This book was released on 2007-06-26 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This popular, often cited text returns in a softcover edition to provide a thorough introduction to statistical physics and thermodynamics, and to exhibit the universal chain of ideas leading from the laws of microphysics to the macroscopic behaviour of matter. A wide range of applications illustrates the concepts, and many exercises reinforce understanding. Volume II applies statistical methods to systems governed by quantum effects, in particular to solid state physics, explaining properties due to the crystal structure or to the lattice excitations or to the electrons. The last chapters are devoted to non-equilibrium processes and to kinetic equations, with many applications included.
Author : Bo Song
Publisher : Springer
ISBN 13 : 3319224522
Total Pages : 265 pages
Book Rating : 4.3/5 (192 download)
Download or read book Dynamic Behavior of Materials, Volume 1 written by Bo Song and published by Springer. This book was released on 2015-10-23 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1 represents the first of nine volumes of technical papers presented at the Society for Experimental Mechanics SEM 15th International Congress & Exposition on Experimental and Applied Mechanics, held at Costa Mesa, California, June 8-11, 2015. The full set of proceedings also includes volumes on: Challenges in Mechanics of Time Dependent Materials, Advancement of Optical Methods in Experimental Mechanics, Experimental and Applied Mechanics 16th International Symposium on MEMS and Nanotechnology, 5th International Symposium on the Mechanics of Biological Systems and Materials, International Symposium on the Mechanics of Composite and Multi-functional Materials, Fracture, Fatigue, Failure and Damage Evolution; and Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems.
Author : Paolo Mele
Publisher :
ISBN 13 : 9781536160864
Total Pages : 0 pages
Book Rating : 4.1/5 (68 download)
Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Author : Peter Atkins
Publisher : OUP Oxford
ISBN 13 : 0191647632
Total Pages : 142 pages
Book Rating : 4.1/5 (916 download)
Download or read book Four Laws That Drive the Universe written by Peter Atkins and published by OUP Oxford. This book was released on 2007-09-06 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laws of thermodynamics drive everything that happens in the universe. From the sudden expansion of a cloud of gas to the cooling of hot metal, and from the unfurling of a leaf to the course of life itself - everything is directed and constrained by four simple laws. They establish fundamental concepts such as temperature and heat, and reveal the arrow of time and even the nature of energy itself. Peter Atkins' powerful and compelling introduction explains what the laws are and how they work, using accessible language and virtually no mathematics. Guiding the reader from the Zeroth Law to the Third Law, he introduces the fascinating concept of entropy, and how it not only explains why your desk tends to get messier, but also how its unstoppable rise constitutes the engine of the universe.
Author : Bernard Ars
Publisher : Kugler Publications
ISBN 13 : 9789062991952
Total Pages : 244 pages
Book Rating : 4.9/5 (919 download)
Download or read book Fibrocartilaginous Eustachian Tube written by Bernard Ars and published by Kugler Publications. This book was released on 2003 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acute and chronic ear disease continues to be one of the leading diseases of childhood. Understanding eustachian tube function and management remains one of the most important aspects in controlling inflammatory ear disease. Chronic ear disease requires elaborate surgical interventions designed to bypass eustachian tube dysfunction and/or poor mastoid aeration, since surgical management of the eustachian tube has been elusive. Our understanding of the ear and hearing continues to expand at record pace, as auditory neuroscientists discover the fundamental molecular structure and function of the auditory system. The cochlear implant has revolutionized the treatment of deafness. In contrast, the complexity of eustachian tube pathophysiology is only just beginning to be appreciated. This book provides a detailed analysis of contemporary knowledge on the morphology, physiology, and gas exchange function of the eustachian tube, middle ear, and mastoid. Newer diagnostic tests, such as sono tubometry, tubomanometry, and endoscopic video-analysis, are also described. Finally, a selection of innovative surgical management strategies for eustachian tube dysfunction is presented. The clinical impact of these diagnostic tools and surgical management options still requires the test of time, as well as investigation by others. This text provides the trainee, clinician, and researcher with the opportunity to acquire state-of-the-art information in a single volume. I am certain that this is just the beginning of our knowledge of ways in which to improve the management of one of the long-standing chronic conditions that result in hearing loss and more serious sequellae.
