Improved frontal sonar

Details Improved frontal sonar Improved frontal sonar

G - Physics

01

S

G01S 15/89 (2006.01)

Patent

CA 2652564

The invention relates to a frontal sonar for observing marine life, characterised in that it comprises means used to insonify an area of the marine floor divided into M sectors and able to carry out a characteristic insonification of each of the sectors of the area during a recurrent use of the sonar; and reception means comprising a physical antenna consisting of a linear network of K transducers, said antenna being lacunary and therefore ambiguous in that it defines N image lobes. The invention is also characterised in that each of the characteristically insonified sectors is associated with a single image lobe defined by the antenna, thereby overcoming the ambiguity of the antenna.

Sonar frontal pour observer le fond marin caractérisé en ce qu'il comporte : des moyens d'insonification d'une zone du sol marin divisée en M secteurs aptes à réaliser une insonification caractéristique de chacun des secteurs de la zone lors d'une récurrence d'utilisation dudit sonar; et, des moyens de réception comportant une antenne physique composée d'un réseau linéaire de K transducteurs, ladite antenne étant lacunaire et par conséquent ambiguë de sorte qu'elle définit N lobes images, et en ce que chacun desdits secteurs insonifiés de manière caractéristique est associé à un unique lobe image définit par l'antenne, de sorte que ladite ambiguïté de l'antenne est levée.

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