Autori: Irinela Chilibon

Editorial: Elseiver, ISSN: 0924-4247, Sensors and Actuators A: Physical, Volume 142, Issue 1, p.124-129, 2008.

Rezumat:

The paper presents aspects concerning the design and achievement of an ultrasound piezoceramic transducer for medical applications. The structure of piezoceramic transducer vibrates at certain acoustic intensity andwork frequency between 800 kHz and 1 MHz and ultrasound vibrations propagate into biologic tissue. The piezoceramic disc converts the electrical energy into a vibratory mechanical one and the ultrasound energy is propagated into the biological tissue. The ultrasound energy effects are: temperature increasing, cavitation, and interstitial liquid dispersion into the tissue. The measurements of the main parameters and characteristics were made by HP 4194 Impedance/Gain-Phase Analyzer. Also, the paper presents the main measurement methods of ultrasound field energy, intensity and derived values generated by ultrasound transducers, distributed in three main groups. The ultrasound piezoceramic transducer 3D-design is useful to present the mechanical elements position inside the transducer’s case, and necessary to manufacture the transducer.

Cuvinte cheie: PZT, Ultrasound transducer, Medical therapy