Method and system for distinguishing between displacing targets

Details Method and system for distinguishing between displacing targets Method and system for distinguishing between displacing targets

1979-11-20

1982-03-30

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367 97, G01S 1504, G01S 1588

Patent

active

043228267

ABSTRACT:
This invention relates to a method and system for distinguishing between displacing targets and a surface of water by transmitting pulses from a transmitter that is submerged in the water, the pulses being reflected and received by a receiver, also submerged in the water. The variations in the distance to the reflecting surface for consecutive pulses are measured and compared with a first value, determined inter alia from the state of the sea, and with another value, determined from the size of the target.

REFERENCES:
patent: 3380018 (1968-04-01), Littrell et al.
patent: 4245332 (1981-01-01), Schaefer

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