Measuring and testing – Vibration – By mechanical waves
Patent
1986-03-04
1987-06-09
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73628, 73641, G01N 2900
Patent
active
046711155
ABSTRACT:
An electronic scanning apparatus ultrasonic imaging adapted to converge or deflect an ultrasonic beam by controlling the amplitude and phase of the vibration of each transducer in a transducer array consisting of a plurality of regularly-arranged transducers, and adapted to move the ultrasonic beam by selecting from all of the transducers constituting the transducer array at least one transducer forming a transmitting and receiving aperture. The apparatus includes bidirectional transmitter-receivers connected to the transducers constituting the transducer array, a first switch unit for selecting the bidirectional transmitter-receivers to form a transmitting and receiving aperture by connecting signal lines to the bidirectional transmitter-receivers, a second switch unit for connecting together the signal lines connected to the transducers which are in positions symmetrical with respect to the center of the transmitting and receiving aperture, and a transmitting and receiving beam former for phasing a plurality of transmitting signals and a plurality of receiving signals.
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Katakura Kageyoshi
Ogawa Toshio
Birmiel Howard A.
Hitachi , Ltd.
Hitachi Medical Corporation
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