Method for increasing the image rate of a sonar and sonar...

Details Method for increasing the image rate of a sonar and sonar... Method for increasing the image rate of a sonar and sonar...

G - Physics

01

S

G01S 15/89 (2006.01) G01S 15/42 (2006.01)

Patent

CA 2046273

The invention relates to a simple sonar system, inexpensive and with a high image rate for the detection of objects and the imaging of marine bottoms. It comprises the emission of n successive non correlated codes in a sector having an angular width exactly equal to n times the angular width of the reception sector THETA R, the reception antenna continuing to perform evolutions during that time while the first emitted signal has not yet reached the maximum range dmax, as well as the reception in the sector of angular width THETA R the echoes from these n codes coming from the n contiguous propagation zones along the reception axis, and in the space comprised between 0 and dmax, each of them having a depth equal to dmax/n. The invention applies to a sonar intended to be installed on a submarine vehicle or in a boat hull.

2046273 9009600 L'invention concerne un système sonar simple, bon marché et à cadence image élevée pour la détection d'objets et l'imagerie des fonds marins. Elle consiste à émettre n codes successifs non corrélés dans un secteur de largeur angulaire exactement égale à n fois la largeur angulaire du secteur de réception .THETA.R, l'antenne de réception continuant d'évoluer pendant ce temps alors que le premier signal émis n'a pas encore atteint la portée maximale dmax, et à recevoir dans le secteur de largeur angulaire .THETA.R les échos de ces n codes provenant de n zones de propagation contigües selon l'axe de réception, et dans l'espace compris entre 0 et dmax, chacune d'entre elles ayant une profondeur égale à dmax/n. Elle s'applique à un sonar destiné à être installé sur un véhicule sous-marin ou dans une coque de navire.

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