G - Physics – 01 – S
Patent
G - Physics
01
S
349/32
G01S 3/80 (2006.01) G01S 3/802 (2006.01) G01S 3/84 (2006.01) G01S 7/52 (2006.01)
Patent
CA 1324208
ABSTRACT OF THE DISCLOSURE The present invention relates to a system for receiving incoming signals from a plurality of directions in a manner such that a Doppler effect is produced. The Doppler effect varies a carrier frequency of the incoming signals. The invention further comprises presenting a display resulting from the received incoming signals on an indicator. A plurality of ultrasonic transducers is provided for receiving the incoming signals. A plurality of preamplifiers amplify the received signals from the transducers. A first coupling unit is provided for connecting at least two ultrasonic transducers to a single preamplifier. A filter is provided for pulse-compressing the received signals. A second coupling unit is provided for successively coupling output terminals of the preamplifiers to an input of the filter. Finally, a indicator is provided for displaying output signals from the filter.
602419
Fukuoka Itsuo
Nagano Hiroshi
Furuno Electric Company Limited
Kirby Eades Gale Baker
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