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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, 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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Split-mode ultrasonic transducer
The Journal of the Acoustical Society of America, 2013A split-mode ultrasonic transducer is investigated in both theory and experiment. This transducer is a two-dimensional structure of periodically poled domains in a ferroelectric wafer with free surfaces. The acoustic vibrations are excited by a radio frequency electric current applied along the length of the wafer, which allows the basal-plane surfaces
Igor, Ostrovskii, Lucien, Cremaldi
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Ultrasonic Aspiration-Biopsy Transducer
Radiology, 1973A specially designed ultrasonic aspiration-biopsy transducer (UABT) containing a central lumen was used as an aid in the aspiration of fluid-containing structures and the biopsy of solid tissue. Ultrasound provided an estimate of the subcutaneous depth of the tissues of interest, and, in the case of cystic masses, allowed an estimate of the volume of ...
B B, Goldberg, H M, Pollack
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A silicon electrostatic ultrasonic transducer
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1989An electric ultrasonic transducer is developed by using a silicon IC process. Design considerations are first presented to obtain high sensitivity and the desired frequency responses in air. The measured transmitter sensitivity is 19.1 dB (0 dB=1 mubar/V) at a point 50 cm away from the devices, when the devices are operated at 150 kHz.
K, Suzuki, K, Higuchi, H, Tanigawa
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Design of ultrasonic wedge transducer
Ultrasonics, 2005Cones and wedges inserted between an ultrasonic transducer and the specimen provide the transducer (circular or rectangular shape) with enhanced capability for point or line contact with the specimen. Such an arrangement is useful in that the transducer can be used for transmitting to and receiving from a point (or line) source, and that it can ...
Guillermo, Rus +2 more
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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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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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Electrostatic ultrasonic transducer and ultrasonic speaker
The Journal of the Acoustical Society of America, 2010A push-pull type electrostatic ultrasonic transducer includes a vibrating film having a conductive layer and a pair of fixed electrodes provided at respective surfaces of the vibrating film. The front-side fixed electrode and the rear-side fixed electrode sandwich the vibrating film.
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