Results 251 to 260 of about 81,416 (305)
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Ultrasonic transducers using PVDF
Ferroelectrics, 1991In a research program on ultrasonic transducers. PVDF has been used for structures needing thinness, flexibility and low acoustic impedance. The specific applications described include focused conical transducers for NDT, array transducers for medical holographic B-scan imaging and transmitters/ receivers for zetapotential measurements in colloidal ...
Jussila, Salme +7 more
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Multidomain ultrasonic transducers
Journal of Applied Physics, 2008A different class of high frequency ultrasonic transducers is theoretically considered and experimentally demonstrated. This transducer generates plane longitudinal waves using a two-dimensional structure of inversely poled ferroelectric domains. The crystalline ferroelectric wafer from which the transducer is fabricated is bounded along the plate ...
Igor Ostrovskii, Andriy Nadtochiy
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Airborne ultrasonic transducer
Ultrasonics, 1996Abstract A bilaminar consisting of a piezoelectric ceramic disk mounted on a polymer disk was chosen to build an ultrasonic proximity detector in air. The influences of the polymer and the ceramic thicknesses on the transducer's dynamic behaviour are investigated using finite element modelling, for various configurations. The influence of the type of
L. Durris +5 more
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Ultrasonic transducer, method for manufacturing ultrasonic transducer, and ultrasonic flowmeter
The Journal of the Acoustical Society of America, 2007It is an object of the present invention to provide an ultrasonic transducer, which is so configured as to reduce the variations in characteristics, thereby to enable the stabilization of the precision, as well as to enable the improvement of the durability, and the like, a method for manufacturing the ultrasonic transducer, and an ultrasonic flowmeter.
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The Journal of the Acoustical Society of America, 2012
A ultrasonic transducer of the invention comprises: a transducer cell including a first electrode and a second electrode disposed separated from the first electrode by an air gap portion; and an electret for applying a potential difference between the first electrode and the second electrode.
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A ultrasonic transducer of the invention comprises: a transducer cell including a first electrode and a second electrode disposed separated from the first electrode by an air gap portion; and an electret for applying a potential difference between the first electrode and the second electrode.
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The Journal of the Acoustical Society of America, 1989
Charles C. Habeger, Willmer A. Wink
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Charles C. Habeger, Willmer A. Wink
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The Journal of the Acoustical Society of America, 1984
Masso Kodera, Shigeyuki Akita
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Masso Kodera, Shigeyuki Akita
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The Journal of the Acoustical Society of America, 2008
An ultrasonic transducer including: a fixed electrode; a vibrating film placed opposite to a surface of the fixed electrode and having a conducting layer; a member that holds the fixed electrode and vibrating film; the fixed electrode including a driving-use fixed electrode formed to drive the ultrasonic transducer, and a detecting-use fixed electrode ...
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An ultrasonic transducer including: a fixed electrode; a vibrating film placed opposite to a surface of the fixed electrode and having a conducting layer; a member that holds the fixed electrode and vibrating film; the fixed electrode including a driving-use fixed electrode formed to drive the ultrasonic transducer, and a detecting-use fixed electrode ...
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Dampened ultrasonic transducer
The Journal of the Acoustical Society of America, 1984An improved dampened ultrasonic transducer for imparting sonic energy to or receiving sonic energy from fluid, having a housing with a cylindrical cavity therein providing a closed end wall at one end and an opening in the opposite end, the housing having internal threads adjacent the opening.
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The Journal of the Acoustical Society of America, 1988
Fritz Breimesser +2 more
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Fritz Breimesser +2 more
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