Phased array acoustic imaging system

Details Phased array acoustic imaging system Phased array acoustic imaging system

1984-05-07

1985-11-05

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

G01N 2900

Patent

active

045506078

ABSTRACT:
A phased array acoustic imaging system including an array of electromechanical transducers, a dedicated signal processing channel for each transducer and electronic control and delay circuits for them, transmits to and receives ultrasonic energy from a body in a controlled, steered and focused fashion. The electronic delay circuits use a unique cyclically symmetrical arrangement of identical delay cells, each with an electronically variable delay element and each dedicated to a receive signal derived from at least one transducer, to form a summing delay line. The individual delay cells are switched under microprocessor control for efficient combined linear-sector scanning or linear or sector scanning alone. The system includes means to achieve dynamic focusing and dynamic apodization in conjunction with the delay cell architecture.

REFERENCES:
patent: 4005382 (1977-01-01), Beaver
patent: 4116229 (1978-09-01), Pering
patent: 4140622 (1979-02-01), Maslak
patent: 4484477 (1984-11-01), Buxton

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