SONAR SYSTEM WITH CURVED ANTENNA OR ANTENNA CONFIGURED TO TRANSMIT THE SAME TRANSMISSION PATTERN AS THE CURVED ANTENNA

摘要

A sonar system to image the seabed, comprises at least one emission antenna to emit an acoustic beam covering a useful angular sector delimited by a first direction and a second direction, the distance between the antenna and the seabed being more significant in the first direction than in the second direction. The emission device is configured to form an emission pattern whose maximum is situated substantially in the first direction and which decreases from the first direction to the second direction and from the first direction in the sense opposite to the second direction, the energy attenuation being faster in the sense opposite to the second direction than toward the second direction.

主权项

1. A sonar system to image the seabed,
comprising at least one emission antenna to emit an acoustic beam directed toward the seabed covering a useful angular sector starting from the antenna and delimited by a first direction and a second direction which are inclined with respect to the horizontal and the vertical, the first direction forming a smaller angle with the horizontal than the angle formed between the second direction and the horizontal, the emission antenna being configured so as to form an emission pattern exhibiting an emitted energy which decreases from the first direction to the second direction, wherein the emission antenna is configured so that for each direction included in a portion of the useful angular sector, delimited by the second direction and a third direction lying between the first direction and the second direction, the energy attenuation with respect to the energy emitted in the first direction substantially compensates the attenuation of the sound energy necessary to image a plane ideal seabed in this direction with respect to the sound energy necessary to image the plane ideal seabed in the first direction.