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1. CA2108449 - PROCEDE DE COMPENSATION DU MOUVEMENT DE L'ANTENNE POUR UN SONAR

Office Canada
Numéro de la demande 2108449
Date de la demande 27.03.1992
Numéro de publication 2108449
Date de publication 17.10.1992
Type de publication A1
CIB
G01S 15/50
GPHYSIQUE
01MÉTROLOGIE; TESTS
SDÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES
15Systèmes utilisant la réflexion ou la reradiation d'ondes acoustiques, p.ex. systèmes sonar
02utilisant la réflexion d'ondes acoustiques
50Systèmes de mesure basés sur le mouvement relatif de la cible
G01S 7/52
GPHYSIQUE
01MÉTROLOGIE; TESTS
SDÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES
7Détails des systèmes correspondant aux groupes G01S13/, G01S15/, G01S17/135
52de systèmes selon le groupe G01S15/56
G01V 1/38
GPHYSIQUE
01MÉTROLOGIE; TESTS
VGÉOPHYSIQUE; MESURE DE LA GRAVITATION; DÉTECTION DES MASSES OU OBJETS; MARQUES D'IDENTIFICATION
1Séismologie; Prospection ou détection sismique ou acoustique
38spécialement adaptées aux zones recouvertes d'eau
CPC
G01V 1/3808
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
1Seismology; Seismic or acoustic prospecting or detecting
38specially adapted for water-covered areas
3808Seismic data acquisition, e.g. survey design
G01S 7/52003
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
52of systems according to group G01S15/00
52003Techniques for enhancing spatial resolution of targets
G01S 15/50
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
15Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
02using reflection of acoustic waves
50Systems of measurement, based on relative movement of the target
Y10S 367/904
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
367Communications, electrical: acoustic wave systems and devices
904Doppler compensation systems
Inventeurs DOISY, YVES
BAUDOUX, JEAN-PIERRE
LE PARQUIER, GUY
Données relatives à la priorité 91/04626 16.04.1991 FR
Titre
(EN) METHOD OF COMPENSATING FOR THE MOVEMENT OF THE ANTENNA FOR A SONAR
(FR) PROCEDE DE COMPENSATION DU MOUVEMENT DE L'ANTENNE POUR UN SONAR
Abrégé
(EN)
2108449 9218878 PCTABS00017 A method for towed sonar arrays, wherein antenna movement is electronically compensated to suppress the Doppler shift in the fixed echoes. For this purpose, a series of M sensors in a towed linear antenna (203) which includes N sensors (205), and where M < N, are selected and electronically switched so that they scan the antenna in a phantomlike manner in the opposite direction to antenna movement and at twice its forward speed. To avoid having too many physical sensors, their signals are interpolated to obtain a sufficient number of phantom sensors to reduce the increment of the phantom sub-antenna's movement and thereby suppress the interfering lobes caused by the incremental nature of said movement. The method allows the sensitivity of sonars to be increased without increasing their power.

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