نتایج جستجو برای: piezoelectric transducer
تعداد نتایج: 32490 فیلتر نتایج به سال:
Ferroelectricity has made a huge impact on science and technology since Joseph Valasek (then Ph.D. student at the University of Minnesota) discovered it in 1920, little longer than 100 years ago. Whereas Dr. Valasek’s original research was motivated by need to develop seismic sensors, present ferroelectric materials have been extensively studied for applications high-energy capacitors, energy h...
With the continuous deepening of ocean exploration and growth emergency rescue needs, hydroacoustic transducer, as an important component sonar, has become more demanding. To improve reception performance piezoelectric we developed a high-frequency, high-sensitivity planar transducer. A variant 1-3-2 type material is used to effective electromechanical coupling coefficient, upper surface covere...
This paper presents an ultrasound piezoceramic transducer, centred into an extracorporeal shock wave lithotriptor system. The electromagnetic acoustic source lithotriptor initiates the incident shock waves into the water, and the ultrasound transducer improves the caviational effects of the bubbles. The piezoelectric transducer is powered by a Function/Pulse Generator type IWATSU SG-4511, and c...
This paper proposes a novel flexible piezoelectric micro-machined ultrasound transducer, which is based on PZT and a polyimide substrate. The transducer is made on the polyimide substrate and packaged with medical polydimethylsiloxane. Instead of etching the PZT ceramic, this paper proposes a method of putting diced PZT blocks into holes on the polyimide which are pre-etched. The device works i...
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