Sonar for avoiding sub-surface underwater objects

Details Sonar for avoiding sub-surface underwater objects Sonar for avoiding sub-surface underwater objects

1990-05-10

1992-08-25

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367 93, 367909, G01S 1587

Patent

active

051425050

ABSTRACT:
Disclosed is a sonar for avoiding sub-surface underwater objects, for a surface vessel, having its directivity in elevation optimized to observe the surface and its surface reverberation reduced to the minimum. It consists in using an acoustic antenna having two columns of n transducers, the first column insonifying, at transmission, an elevation sector corresponding to the collision-risk zone and forming channels at reception, in the insonified elevation sector, the width of the channels being all the finer as the desired precision of the measurement of the position in elevation is high. The second column is necessary for the localization in relative bearing. The disclosure can be applied to the precise localization in elevation of objects located in the path of a vessel.

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