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1. WO2000013038 - METHOD AND APPARATUS FOR IMPROVING SIDELOBE PERFORMANCE OF SPARSE ARRAY USING HARMONIC IMAGING

Publication Number WO/2000/013038
Publication Date 09.03.2000
International Application No. PCT/US1999/019722
International Filing Date 30.08.1999
IPC
G01S 7/52 2006.01
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/, G01S15/, G01S17/127
52of systems according to group G01S15/58
G01S 15/89 2006.01
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
88Sonar systems specially adapted for specific applications
89for mapping or imaging
CPC
G01N 2291/02491
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2291Indexing codes associated with group G01N29/00
02Indexing codes associated with the analysed material
024Mixtures
02491Materials with nonlinear acoustic properties
G01S 15/8909
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
88Sonar systems specially adapted for specific applications
89for mapping or imaging
8906Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
8909using a static transducer configuration
G01S 7/52047
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
52017particularly adapted to short-range imaging
52046Techniques for image enhancement involving transmitter or receiver
52047for elimination of side lobes or of grating lobes; for increasing resolving power
Applicants
  • GENERAL ELECTRIC COMPANY [US]/[US]
Inventors
  • MO, Lary, Y., L.
Agents
  • STECKLER, Henry, I.
Priority Data
09/145,53302.09.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR IMPROVING SIDELOBE PERFORMANCE OF SPARSE ARRAY USING HARMONIC IMAGING
(FR) PROCEDE ET APPAREIL AMELIORANT LA QUALITE DE LOBE LATERAL D'UNE MATRICE CREUSE PAR IMAGERIE HARMONIQUE
Abstract
(EN)
A method and an apparatus for enhancing the side-lobe performance of a sparse ultrasonic transducer array using harmonic imaging to reduce all beam sidelobe (including grating lobe) levels. Harmonic imaging consists of using the active transducer elements to transmit an ultrasound signal (wideband or narrowband) of center frequency $i(f)0 and receive at one or more harmonic frequencies $i(nf)0, where n $m(G) 2.
(FR)
On décrit un procédé et un appareil qui permettent d'améliorer la qualité de lobe latéral d'une matrice de transducteur ultrasonore creuse par imagerie harmonique pour réduire les niveaux de lobe latéral (y compris le lobe de réticule) du faisceau tout entier. L'imagerie harmonique consiste à utiliser les éléments de transducteur actifs pour émettre un signal d'ultrason (à large bande ou à bande étroite) de fréquence centrale $i(f)0 et pour assurer la réception à une ou plusieurs fréquences harmoniques $i(nf)0, où n $m(G) 2.
Also published as
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