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Diffraction aperture non-ideal behaviour of air coupled transducers array elements designed for NDT

Autor
Prego, J.; Montero de Espinosa, F.; Salazar, J.; García-Álvarez, J.; Chavez-Dominguez, J. A.; Turo, A.; Garcia, M.
Tipus d'activitat
Article en revista
Revista
Ultrasonics
Data de publicació
2006-12-22
Volum
44
Número
Supplement
Pàgina inicial
e667
Pàgina final
e672
DOI
https://doi.org/10.1016/j.ultras.2006.05.125 Obrir en finestra nova
Resum
Air coupled piezoelectric ultrasonic array transducers are a novel tool that could lead to interesting advances in the area of non-contact laminar material testing using Lamb wave’s propagation techniques. A key issue on the development of such transducers is their efficient coupling to air media (impedance mismatch between the piezoelectric material and air is 90 dB or more). Adaptation layers are used in order to attain good matching and avoid possible serious signal degradation. However, th...
Paraules clau
Air coupled array, Apodized aperture, Radiation aperture modification, Surface non-ideal behaviour
Grup de recerca
CREB - Centre de Recerca en Enginyeria Biomedica
GSS - Grup Sistemes Sensors

Participants