The resonance frequencies on mechanically pre-stressed ultrasonic piezotransducers.
Ultrasonics
; 39(1): 1-5, 2001 Jan.
Article
em En
| MEDLINE
| ID: mdl-11205579
The piezotransducers employed in high power ultrasound are composed of piezoelectric ceramics and metallic pieces. These transducers are mechanically pre-stressed in order to avoid the ceramic fractures when high voltage is applied under resonance. The resonance and anti-resonance frequencies are shifted depending on the level of applied mechanical pre-stressing. This paper discusses some causes of this shifting on a experimental study. The discussion takes into account the variations on characteristic parameters of the ceramics and the acoustic coupling between parts of the transducer.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transdutores
/
Ultrassonografia
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Revista:
Ultrasonics
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Holanda