A theoretical analysis of a piezoelectric ultrasound device with an active matching layer

This paper investigates the use of magnetically active materials in the matching layer of a piezoelectric transducer. This then allows the performance of the device to be dynamically altered by applying an external field. The effect that this new matching layer has on the performance of a typical de...

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Veröffentlicht in:	Ultrasonics 2007-12, Vol.47 (1), p.102-110
Hauptverfasser:	Mulholland, Anthony J., O’Leary, Richard L., Ramadas, Nishal, Parr, Agnes, Troge, Alexandre, Pethrick, Richard A., Hayward, Gordon
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustics Computer Simulation Computer-Aided Design Electrochemistry - instrumentation Electrochemistry - methods Equipment Design Equipment Failure Analysis Exact sciences and technology Fundamental areas of phenomenology (including applications) Magnetorheological Matching layer Membranes, Artificial Modelling Models, Theoretical Physics Transducers Transduction acoustical devices for the generation and reproduction of sound Ultrasonic transducer Ultrasonics, quantum acoustics, and physical effects of sound Ultrasonography - instrumentation Ultrasonography - methods
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Beschreibung
Zusammenfassung:	This paper investigates the use of magnetically active materials in the matching layer of a piezoelectric transducer. This then allows the performance of the device to be dynamically altered by applying an external field. The effect that this new matching layer has on the performance of a typical device is theoretically investigated here. It transpires that the additional flexibility of an active matching layer can be used to maintain the efficiency of the device as the external load is varied.
ISSN:	0041-624X 1874-9968
DOI:	10.1016/j.ultras.2007.08.002