Forward-looking sonar and underwater image display system

Details Forward-looking sonar and underwater image display system Forward-looking sonar and underwater image display system

2008-05-06

2008-05-06

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Echo systems

Side scanning or contour mapping sonar systems

Reexamination Certificate

active

07369459

ABSTRACT:
A forward-looking sonar includes a transducer array which is divided into a first sub array and a second sub array, a first beamforming section for forming a first receiving beam with the first sub array, and a second beamforming section for forming a second receiving beam with the second sub array. The forward-looking sonar receives target echoes from a wide sounding area with these receiving beams. The forward-looking sonar further includes a position measurement section for determining the position of a target based on the direction of the target calculated from a phase difference between the echoes from the target received by the first and second receiving beams by a split-beam method and the distance to the target calculated from time needed for receiving the echoes after transmission.

REFERENCES:
patent: 5530680 (1996-06-01), Whitehurst
patent: 5675552 (1997-10-01), Hicks et al.
patent: 2005/0007881 (2005-01-01), Zimmerman et al.
patent: 2417081 (2006-02-01), None
patent: 2-88984 (1990-03-01), None
patent: 2001-311770 (2001-11-01), None
patent: 2001311770 (2001-11-01), None

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