Close range sonar system and method

Details Close range sonar system and method Close range sonar system and method

2006-11-21

2006-11-21

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

Reexamination Certificate

active

07139221

ABSTRACT:
A system for close range sonar is provided. The system provides sufficient warning to permit maneuvering to avoid a close encounter even in the forward starboard/port regions, which have been problematic in the past due to ownship noise. The system utilizes a hull mounted sonar array and a towed sonar array which may be controlled in position to provide sufficient separation of noise received by both sonar arrays such that the noise is largely uncorrelated. The system utilizes beamformers for each array to supply a cross-correlator section which is able to minimize the ownship noise and maximize the signal thereby providing more time for maneuvering. The system also provides a LOFAR display and other displays that are highly sensitive to detecting close encounters.

REFERENCES:
patent: 5142505 (1992-08-01), Peynaud
patent: 5400300 (1995-03-01), Bick et al.
patent: 5708626 (1998-01-01), Hrubes
patent: 5969665 (1999-10-01), Yufa
patent: 6249241 (2001-06-01), Jordan et al.
patent: 2003/0227823 (2003-12-01), Carter et al.

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