Ultrasonic scanning apparatus

Details Ultrasonic scanning apparatus Ultrasonic scanning apparatus

1986-01-08

1987-05-12

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73609, 73628, G01N 2900

Patent

active

046639730

ABSTRACT:
An ultrasonic scanning apparatus includes a transducer array made up of a plurality of ultrasonic transducer elements and delay lines connected through individual switch elements to the transducer elements. The transducer array, the switch elements and the delay lines are each divided into two blocks. The ultrasonic echo signals derived from these blocks are summed through the corresponding delay lines. One of the summed signals of both the blocks is applied through a fixed delay line to an adder. The other of the signals is directly applied to the adder. The adder adds together these echo signals.

REFERENCES:
patent: 3919683 (1975-11-01), Itamura et al.
patent: 4235111 (1980-11-01), Hassler
patent: 4257271 (1981-03-01), Glenn
patent: 4392379 (1983-07-01), Yamaguchi
patent: 4505156 (1985-03-01), Questo
patent: 4534359 (1985-08-01), Miller-Jones et al.
Gabel et al., "Hybrid Time-Delay/Phase-Shift Digital Beamforming for Uniform Collinear Arrays," J. Acoust. Soc. Am. 75(6), pp. 1837-1947, Jun. 1984.

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