Fish sonar

Details Fish sonar Fish sonar

1980-12-16

1984-01-10

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367 97, 367115, G01S 380, G01S 1596

Patent

active

044256353

ABSTRACT:
A fish sonar is capable of detecting ultrasonic waves from a desired direction by shaping the waveforms of the outputs of a pair of vibrators spaced apart by a certain distance, and detecting a delay of the output from one of the vibrators with respect to that of the other of the vibrators so as to detect the direction of the ultrasonic waves coming to the pair of vibrators and to delay the output of the other of the vibrators with respect to the output of one of the vibrators.

REFERENCES:
patent: 3163844 (1964-12-01), Martin
patent: 3548321 (1970-12-01), Duquesne
patent: 3600690 (1971-08-01), White
patent: 3660647 (1972-05-01), Pryor, Jr.
patent: 3696328 (1972-10-01), Schwartz
patent: 3906361 (1975-09-01), Nessler et al.
patent: 3922630 (1975-11-01), Murphree
patent: 3922634 (1975-11-01), Warner
patent: 4204281 (1980-05-01), Hagemann

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