Communications – electrical: acoustic wave systems and devices – Echo systems – Parametric sonar
Patent
1992-05-21
1993-08-10
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Parametric sonar
G01S 1500
Patent
active
052355586
ABSTRACT:
A sonar system for use in a water body includes a projector on the bottom of a water body for generating and transmitting a direct beam of acoustic energy. A receiving array is immersed in the water body outside the direct beam for detecting reflections from an target in the direct beam. The receiving array may be a horizontal or vertical linear array of hydrophones in the water body. The array of hydrophones may have output signals coupled to an A/D convertor and a multiplexor for digitizing and multiplexing the signals to prepare for transmission and analysis of the signals. A pair of separated projectors on the bottom of the water body may generate parametric acoustic arrays for transmitting direct beams of acoustic energy through the water body towards each other. A receiving array immersed in the water body outside the direct beams detect any reflections from an object in the acoustic beams.
REFERENCES:
patent: 4320474 (1982-03-01), Huckabay et al.
patent: 4330873 (1982-05-01), Peterson
patent: 4939702 (1990-07-01), Murphee
Stapleton Joseph J.
Woodsum Harvey C.
GTE Government Systems Corporation
Pihulic Daniel T.
Yeo J. Stephen
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