Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Guy Feuillard"'
Autor:
Marc Lethiecq, Naoufal Saadaoui, Van Thien Nguyen, Jean Francois Saillant, Guy Feuillard, L. P. Tran Huu Hue
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 68:3608-3615
Symmetric reflector ultrasonic transducers (SRUTs) are a new type of ultrasonic transducer that take advantage of the ultrasonic wave emitted on the rear face of the active element. In this work, the electroacoustic modeling and characterization of s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82cff48b20906782140dd5291ca17046
https://doi.org/10.1109/tuffc.2021.3101124
https://doi.org/10.1109/tuffc.2021.3101124
Autor:
Guy Feuillard, Hossep Achdjian, Tom Richard, Francois Vander Meulen, Christian Prax, Jean Philippe Pineau, Jean Christophe Valiere
Publikováno v:
2022 IEEE International Ultrasonics Symposium (IUS).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69ea040c9d92b9683173a219325ef10b
https://doi.org/10.1109/ius54386.2022.9957650
https://doi.org/10.1109/ius54386.2022.9957650
Publikováno v:
Journal of Materials Science Research. 10:84
The characterization of ceramics is essential for the optimization of ultrasonic transducers. To do this we must determine the functional properties of ceramics which are: speed of vibration of longitudinal waves kt = Coupling coefficient: indicates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::983c5e6f2f05ef56b501e6aee7e4ce82
https://doi.org/10.5539/jmsr.v10n2p84
https://doi.org/10.5539/jmsr.v10n2p84
Publikováno v:
Ultrasonics. 73:253-261
We propose a method to identify the different echoes of an overlapped ultrasonic signal. This method is based on an iterative algorithm that compares the experimental signal to a realistic dictionary of trial functions and allows identification of on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a2398ad0b7b0402f1184b107e8c4406
https://doi.org/10.1016/j.ultras.2016.09.010
https://doi.org/10.1016/j.ultras.2016.09.010
Publikováno v:
Advances in Applied Ceramics
Advances in Applied Ceramics, Maney Publishing, 2018, 117 (5), pp.285-290. ⟨10.1080/17436753.2018.1458475⟩
Advances in Applied Ceramics, Maney Publishing, 2018, 117 (5), pp.285-290. ⟨10.1080/17436753.2018.1458475⟩
Laser interferometry techniques have shown their ability to assess the mechanical response of a piezoelectric thin film. To support these investigations, a numerical study based on the finite element method is carried out: three-dimensional modelling
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0db9f06cf7a736cb824a5baefa2351d2
https://hal.archives-ouvertes.fr/hal-01842918
https://hal.archives-ouvertes.fr/hal-01842918
Publikováno v:
2016 IEEE International Ultrasonics Symposium (IUS).
Adaptation of the Matching Pursuit algorithm is presented to simulate the successive overlapped echoes of an ultrasonic signal. Crucial step of sparse representation algorithm such as MP algorithm is the choice of the dictionary. Here, the dictionary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58b05c56a1ff2d5c720286b6b504a323
https://doi.org/10.1109/ultsym.2016.7728766
https://doi.org/10.1109/ultsym.2016.7728766
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 56:1085-1099
The purpose of this study is to model and understand the role of an applied mechanical stress in piezoelectric materials as far as electroacoustic parameters are concerned. In the field of thick or thin film technology, understanding and predicting t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42dbccd93534eb90b5eea48f479591ff
https://doi.org/10.1109/tuffc.2009.1142
https://doi.org/10.1109/tuffc.2009.1142
Autor:
Janez Holc, Marc Lethiecq, Danjela Kuscer, Pierre Marechal, Guy Feuillard, Franck Levassort, M. Kosec
Publikováno v:
Ferroelectrics. 371:89-97
The fabrication of piezoelectric transducers for high resolution medical imaging applications requires a backing material to damp the piezoelectric resonance, resulting in a shorter time response, i.e. improved resolution, but lower sensitivity. Thus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2377e13fe1ee1583ab04ebe0550e9021
https://doi.org/10.1080/00150190802396850
https://doi.org/10.1080/00150190802396850
Autor:
Marc Lethiecq, Lionel Haumesser, Janez Holc, Guy Feuillard, L.P. Tran-Huu-Hue, Danjela Kuscer, Pierre Marechal
Publikováno v:
Ultrasonics. 48:141-149
Solidly mounted integrated transducers with a Bragg cell inserted between the piezoelectric film and the substrate are investigated for high frequency ultrasonic applications. A numerically stable recursive one dimensional transmission/reflection mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3accd685bd9574e71efd7283e939bdd3
https://doi.org/10.1016/j.ultras.2007.11.007
https://doi.org/10.1016/j.ultras.2007.11.007
Publikováno v:
Electromagnetics
Electromagnetics, Taylor & Francis, 2008, 28 (3), pp.175-185. ⟨10.1080/02726340801921551⟩
Electromagnetics, Taylor & Francis, 2008, 28 (3), pp.175-185. ⟨10.1080/02726340801921551⟩
In theoretically studying electromagnetic surface wave propagation in crystals possessing piezoelectric properties, we found that, if the frequency is smaller than typical phonon frequencies (not exceeding 1012–1013 Hz), then electric fields are ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15a15cf7d6f9d438d2b061a7094ff191
https://doi.org/10.1080/02726340801921551
https://doi.org/10.1080/02726340801921551