G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 7/62 (2006.01) G01S 15/58 (2006.01) G01S 15/87 (2006.01) G01S 15/89 (2006.01) G01S 15/96 (2006.01)
Patent
CA 2067358
The present invention relates to an underwater detection system which searches the water in a wide range of directions and displays moving targets in different colors depending on speeds of the targets. An underwater detection system according to the present invention comprises ultrasonic transmitting means (101) for radiating a search pulse having a carrier frequency in a wide range of directions, ultrasonic receiving means {1p, 1q) for successively searching areas in mutually different directions in the wide range of directions to receive ultrasonic signals coming from each of respective directions therein at least two times, phase difference detecting means (10, 12) for detecting a phase difference between the carriers of the reception signals having come from the same direction in the wide range of directions and caught by the ultrasonic receiving means, calculating means (18) for calculating the angular frequency of the reception signals based on the phase difference of the carriers of signals, color signal generating means (103) for producing predetermined color signals corresponding to angular frequencies based on signals representative of the angular carrier frequency outputted by the angular frequency calculating means, and displaying means (104) for displaying output signals of the color signals generating means.
Furuno Electric Company Limited
Kirby Eades Gale Baker
LandOfFree
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