Generation and detection of Rayleigh waves with improved attenuation using a piezo-copolymer transducer P(VDF-TrFE)

Autor:	J.P. Perrier, Ph. Benech, M. Dali-Ali
Rok vydání:	1995
Předmět:	Materials science Acoustics and Ultrasonics business.industry Attenuation Piezoelectricity symbols.namesake Transducer Optics symbols Maximum power transfer theorem Ultrasonic sensor Rayleigh wave business Electrical impedance Longitudinal wave
Zdroj:	Ultrasonics. 33:321-322
ISSN:	0041-624X
DOI:	10.1016/0041-624x(95)00038-5
Popis:	Efficient elastic Rayleigh waves have been launched and detected on a non-piezoelectric substrate (duraluminium) with identical longitudinal wave transducers made of a piezoelectric copolymer film P(VDF-TrFE). We have improved the attenuation of Rayleigh waves by more than 20 dB, by fixing the electrode spatial period in accordance with the frequency of excitation for which the elastic power transfer to the medium of propagation is at a maximum, and by electrical impedance matching at emission and reception. We also report the effect of the coupling layer thickness on the elastic power and electrical impedance of the transducer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::72cd7ab1e1f26bf9b0f4209597f5dd1c https://doi.org/10.1016/0041-624x(95)00038-5 Zobrazit plný text záznamu Full Text from ScienceDirect