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1. WO2021009495 - METHOD AND APPARATUS FOR ADAPTIVE BEAMFORMING

Publication Number WO/2021/009495
Publication Date 21.01.2021
International Application No. PCT/GB2020/051671
International Filing Date 10.07.2020
IPC
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
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
CPC
G01S 15/89
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
G01S 15/8915
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
8915using a transducer array
G01S 15/8993
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
8993Three dimensional imaging systems
G01S 15/8995
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
8995Combining images from different aspect angles, e.g. spatial compounding
G01S 7/52046
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
Applicants
  • INVEN2 AS [NO]/[NO]
  • SAMUELS, Adrian James [GB]/[GB] (MG)
Inventors
  • RINDAL, Ole Marius Hoel
  • AUSTENG, Andreas
  • RODRIGUEZ-MOLARES, Alfonso
Agents
  • DEHNS
Priority Data
1910043.712.07.2019GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR ADAPTIVE BEAMFORMING
(FR) PROCÉDÉ ET APPAREIL DE FORMATION DE FAISCEAU ADAPTATIVE
Abstract
(EN)
In a method of imaging, a first transmission is carried out in a first direction. The reflected signals are received using a plurality of receiving devices. For each device, a two/three dimensional data set is formed. The first dimension (36b) represents the depth or range and the second dimension (36a) represents lateral distance. The optional third dimension (36c) represents an orthogonal lateral distance. The data set is formed by calculating times of flight for each pixel within a grid. The receive time is then assigned to each pixel. A data set is generated for each receiver, which results in a three/four dimensional data set from the first transmission of signals. A second transmission of signals is made in a different direction or from a different position. The signals received from the second transmission are received in the same way as those received from the first transmission. The signals are first summed across the transmit dimension to form a single data set, so that the data from various transmissions is combined. Adaptive beamforming is then carried out on this data set, resulting in a single adaptive image.
(FR)
L'invention concerne un procédé d'imagerie dans lequel une première émission est réalisée dans une première direction. Les signaux réfléchis sont reçus à l'aide d'une pluralité de dispositifs de réception. Pour chaque dispositif, un ensemble de données en deux/trois dimensions est formé. La première dimension (36b) représente la profondeur ou la portée et la seconde dimension (36a) représente une distance latérale. La troisième dimension optionnelle (36c) représente une distance latérale orthogonale. L'ensemble de données est formé par calcul du temps de vol de chaque pixel à l'intérieur d'une grille. Le temps de réception est ensuite attribué à chaque pixel. Un ensemble de données est généré pour chaque récepteur, ce qui permet d'obtenir un ensemble de données en trois/quatre dimensions à partir de la première émission de signaux. Une seconde émission de signaux est réalisée dans une direction différente ou à partir d'une position différente. Les signaux reçus de la seconde émission sont reçus de la même manière que les signaux reçus de la première émission. Les signaux sont d'abord additionnés sur l'ensemble de la dimension d'émission afin de former un seul ensemble de données, de telle sorte que les données provenant de diverses émissions soient combinées. Une formation de faisceau adaptative est ensuite réalisée sur ledit ensemble de données, ce qui permet d'obtenir une seule image adaptative.
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