Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1978-03-16
1980-11-18
Tubbesing, T. H.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
73626, 343100SA, G01S 966
Patent
active
042349400
ABSTRACT:
In an ultrasound transmitting or receiving apparatus, a plurality of ultrasound transducer elements comprising an ultrasound probe are arranged along a line to transmit and receive ultrasonic waves. For the purpose of sequentially transmitting and receiving an ultrasound beam through the transducer elements, variable-delay circuits are provided for applying delay times to the transmitting signals and/or the received signals. The variable-delay circuits include memory control devices, the addresses of which correspond to the respective azimuthal directions of transmitting and receiving the ultrasound beam. The outputs of the memory devices are connected to control terminals of transfer switches, which in turn are connected to tapped delay lines. The memory devices produce control codes such that the tapped delay lines produce predetermined delay times which control the azimuthal directions of transmitting or receiving the ultrasound beam.
REFERENCES:
patent: 4080838 (1978-03-01), Kuroda et al.
patent: 4099419 (1978-07-01), Kuroda et al.
patent: 4116229 (1978-09-01), Pering
patent: 4127034 (1978-11-01), Lederman et al.
O. T. von Ramm et al., Cardiac Imaging Using a Phased Array Ultrasound System; Circulation; vol. 53, No. 2, Feb. 1976.
Tokyo Shibaura Electric Co. Ltd.
Tubbesing T. H.
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