Imaging system with multiple, simultaneous transmissions

Details Imaging system with multiple, simultaneous transmissions Imaging system with multiple, simultaneous transmissions

1981-10-08

1984-06-26

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

With memory means

73624, 367100, 367101, G01S 1589

Patent

active

044569823

ABSTRACT:
A bidimensional imaging system by echoes including a transmitting array and a receiving array. The transmitting array includes a row of transmitters (E.sub.1, E.sub.2, . . . , E.sub.i, E.sub.N) parallel to a direction Oz and the receiving array includes a row of receivers in a direction Ox. All the transmitters simultaneously transmit signals with different codes. The signals received are demodulated and the real and imaginary components of these signals are applied to two multiplexing circuits (61.1, 61.2). After modulation the multiplexed signals are applied to a Fourier transformation circuit (63), which sequentially supplies reception channels V.sub.k (.theta..sub.k) for the direction referenced by angle .theta..sub.k and which are stored in memories (66.1, 66.2). Other memories (70.1, 70.2) contain signals S.sub.i (.phi..sub.i) transmitted in an angular direction referenced by .phi..sub.i. The two pairs of memories (66.1, 66.2 and 70.1, 70.2) are connected and the signals are applied after modulation to a convolver (61), which supplies signals of the bidimensional image. The imaging system has application to ultrasonic submarine cameras, submarine target classifiers, medical acoustic imaging and non-destructive tests.

REFERENCES:
patent: 3577772 (1971-05-01), Perilhou et al.
patent: 3771116 (1973-11-01), Farrah
patent: 4068234 (1978-01-01), O'Meara
patent: 4119940 (1978-10-01), Keating et al.
patent: 4288866 (1981-09-01), Sackman

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