Synthetic focus annular array transducer

Details Synthetic focus annular array transducer Synthetic focus annular array transducer

1986-06-20

1989-03-21

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367 11, 367105, G03B 4206

Patent

active

048150479

ABSTRACT:
Ultrasound imaging apparatus having an array of electro-acoustic transducer rings, means for exciting said transducer rings in sequence so as to cause them to transmit successive pulses of pressure waves along a path at intervals at least equal to the time of transit of the pressure waves to a maximum range and back to the array, dynamically controlled delays respectively coupled to each transducer ring that bring the electrical signals the transducers supply in response to pressure of waves of each pulse that are reflected along a given range into reasonable phase coherence, processing means coupled to the delays so as to provide a composite signal, and a summing memory coupled to receive the composite signal.

REFERENCES:
patent: 4154113 (1979-05-01), Engeler
patent: 4155259 (1979-05-01), Engeler
patent: 4307613 (1981-12-01), Fox
patent: 4481822 (1984-11-01), Kubota et al.
patent: 4484477 (1984-11-01), Buxton
patent: 4487073 (1984-12-01), Sumino
patent: 4550607 (1985-11-01), Maslak et al.

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