Acoustic emission method for sonars

Details Acoustic emission method for sonars Acoustic emission method for sonars

G - Physics

01

S

G01S 7/524 (2006.01) G01S 7/521 (2006.01) G01V 1/145 (2006.01) G01V 1/38 (2006.01) G10K 9/12 (2006.01)

Patent

CA 2208982

An acoustic emission method for sonars is described. The method comprises providing the sonar with a transmission antenna (303) separate from the reception antenna (301). The transmission antenna is shaped as a linear acoustic antenna and can be towed together with a reception linear acoustic antenna, or be suspended from a helicopter (202) to form a dipping type sonar (221). Sensing by such sonars is facilitated by increasing the sound level by the directivity index, while the levels of reverberation from the sea floor and the surface of the sea are reduced.

L'invention concerne un procédé d'émission acoustique pour sonar. Elle consiste à munir un sonar d'une antenne d'émission distincte (303) de l'antenne de réception (301). Cette antenne d'émission présente la forme d'une antenne acoustique linéaire et peut être soit remorquée simultanément avec une antenne acoustique linéaire de réception, soit être suspendue à un hélicoptère (202) pour former un sonar de type "trempé" (221). Elle permet de faciliter la détection par ce genre de sonar en augmentant le niveau sonore par l'index de directivité, tout en réduisant les niveaux de réverbération provenant du fond et de la surface de la mer.

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