WO2012085339A1 - Procédé et appareil pour l'imagerie ultrasonore - Google Patents

Procédé et appareil pour l'imagerie ultrasonore Download PDF

Info

Publication number
WO2012085339A1
WO2012085339A1 PCT/FI2011/051126 FI2011051126W WO2012085339A1 WO 2012085339 A1 WO2012085339 A1 WO 2012085339A1 FI 2011051126 W FI2011051126 W FI 2011051126W WO 2012085339 A1 WO2012085339 A1 WO 2012085339A1
Authority
WO
WIPO (PCT)
Prior art keywords
ultrasound
angular dimension
reflector
sector
transmitter
Prior art date
Application number
PCT/FI2011/051126
Other languages
English (en)
Inventor
Heikki Oukka
Original Assignee
Simsonar Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Simsonar Oy filed Critical Simsonar Oy
Publication of WO2012085339A1 publication Critical patent/WO2012085339A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/66—Sonar tracking systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/102—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics
    • G01S15/104—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics wherein the transmitted pulses use a frequency- or phase-modulated carrier wave
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/521—Constructional features
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/524—Transmitters
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/20—Reflecting arrangements
    • G10K11/205—Reflecting arrangements for underwater use
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2200/00—Details of methods or devices for transmitting, conducting or directing sound in general
    • G10K2200/11—Underwater, e.g. transducers for generating acoustic waves underwater

Definitions

  • the invention relates to ultrasonic imaging, in particular, to imaging performed in a liquid without visual visibility.
  • echo sounding By means of echo sounding it is possible to search and detect objects also in turbid water.
  • the use of echo sounders is known in fishing and in military technology. In these applications, however, echo sounding does not provide an actual image of objects in the water, nor does it try to circumvent the problem caused by the turbidity of water, but it mainly pursues to determine distances and directions of objects. Therefore, there is a need for a more accurate ultrasonic imaging device.
  • An object of the present invention is to provide an apparatus which enables formation of a three-dimensional ultrasonic image.
  • a feature of the invention includes an imaging apparatus for producing an image by ultrasound.
  • the imaging apparatus comprises an ultrasonic transmitter, a separate transmitter reflector, a set of receiving elements including a plurality of receiving elements, and a signal processing unit; and the ultrasonic trqansmitter is configured to generate an ultrasound consisting of a set of frequencies and to direct it towards the transmitter reflector;
  • the transmitter reflector is configured to direct the ultrasound to a solid angle, in a first angular dimension of which the transmitter reflector is configured to direct the ultrasound to a predetermined transmission sector and in a second angular dimension of which the transmitter reflector is configured to direct different frequencies of the ultrasound to different transmission sector parts as a function of frequency;
  • each receiver element in the set of receiving elements is configured to form in said first angular dimension a predetermined reception sector part oriented in a direction different from other receiving elements, all the reception sector parts together covering completely or for the most part the transmission sector of the first angular dimension, and the set of receiving elements is configured to form in the second ang
  • a second feature of the invention includes an imaging method for producing an image by ultrasound.
  • the method comprises: generating with an ultrasonic transmitter an ultrasound consisting of a set of frequencies and transmitting it towards a transmitter reflector; directing with the transmitter reflector the ultrasound to a solid angle such that in a first angular dimension the ultrasound is directed to a predetermined transmission sector and that in a second angular dimension different frequencies of the ultrasound are directed as a function of the frequencies of different transmission sector parts; forming with each receiver element in the set of receiving elements in said first angular dimension a predetermined reception sector part oriented in a direction different from other receiving elements, all the reception sector parts together covering completely, or for the most part, the transmission sector of the first angular dimension, and forming with the set of receiving elements in the second angular dimension a reception sector which is completely, or at least for the most part, overlapping with the transmission sector of the different frequencies, and converting the received ultrasounds to corresponding electric signals and transmitting the electric signals to a signal processing unit; forming with the
  • Figure 1 illustrates ultrasonic imaging in water
  • Figure 2A shows an ultrasonic apparatus
  • Figure 2B shows the ultrasonic apparatus from a different angle from Figure 2A
  • Figure 3A shows an ultrasonic transmitter
  • Figure 3B shows the ultrasonic transmitter from a different angle from Figure 3A
  • Figure 4 shows an ultrasonic antenna
  • Figure 5 shows coding of ultrasound
  • Figure 6 shows an image produced by ultrasound, the pixels of which image are formed by means of different transmission frequencies and different reception angles
  • Figure 7 shows temporally consecutive images
  • Figure 8 is a flow chart of the method.
  • FIG. 1 illustrates ultrasonic imaging in water, but instead of water, the imaging may also be carried out in some other liquid.
  • a controller 100 which may be e.g. a computer, such as PC or the like, may be on a boat or a ship 80, for instance. Alternatively, the controller may also be onshore.
  • the controller 100 controls the operation of the imaging apparatus and serves as a user interface.
  • a transceiver 82 of the imaging apparatus is at least partly immersed in water 86 and a transmission and reception beam 84 of the transceiver 82 may be directed obliquely downwardly towards the bottom 92 whose distance from the transceiver 82 may range from about one metre up to hundreds of metres.
  • the transmission and reception beam 84 are drawn completely identical and overlapping, even though the beams may also be just partly overlapping.
  • the transmission beam and the reception beam open at a solid angle that is two-dimensional.
  • the angle of a first angular dimension is ⁇ and the angle of a second angular dimension is ⁇ .
  • the first angular dimension may refer to a horizontal angle, for instance, and the second angular dimension may refer to a vertical angle, for instance.
  • the reception beam of the imaging apparatus is divided into a plurality of reception sector parts 98 in the direction of the first angular dimension ⁇ , which enables detection of the ultrasound intensity separately in each reception sector part 98.
  • the transmission beam of the imaging apparatus is divided into transmission sector parts 99 as a function of the frequency of ultrasound in the direction of the second angular dimension ⁇ , which enables detection of the ultrasound intensity separately in each transmission sector part 99.
  • each transmission sector is also detected as a corresponding reception sector in the second angular dimension on the basis of the frequency. Because the transmission and reception beams are at least for the most part overlapping, the intensity of the received ultrasound may be divided by means of said cross sectors into a matrix whose elements may represent pixels in an image.
  • the best resolution in the first angular dimension may be e.g. about 0.3°, which corresponds to about 5cm at a distance of 10 metres.
  • the best resolution in the second angular dimension may be e.g. about 1°, which corresponds to about 18cm at a distance of 10 metres.
  • the imaging apparatus it is possible to take a two- dimensional picture of an imaging area 94, 96 at a desired depth in the transmission and reception beam 84.
  • the picture may also be one-dimensional, but often it is more interesting to produce a two-dimensional picture.
  • a picture is obtained on the basis of how long it took of the ultrasound to travel a distance r from the transceiver 82 to the imaging area 96 and back. Because the distance r between the imaging area 94 and the transceiver 82 is shorter, the relating transit delay is shorter.
  • the best resolution ⁇ ⁇ in depth, i.e. radial direction may be in the order of centimetres.
  • the imaging apparatus may comprise a controller 100, which may include a display and a user interface.
  • the con- troller 100 comprises a processor, memory and computer programs for enabling signal processing.
  • the imaging apparatus also comprises an ultrasonic transmitter 102, a separate transmitter reflector 104 and a set of receiving elements 110.
  • the ultrasonic transmitter 102 generates ultrasound consisting of a set of frequencies fi to f , where N may be a number larger than one. For instance, N may be tens or hundreds, without limiting thereto, however. A frequency range may be, for instance, from 500 to 3000 kHz, without limiting thereto, however.
  • the ultrasound may have a continuous frequency band, or the ultrasounds may be separate frequencies. The separate frequencies may be consecutive frequencies at uniform or non-uniform intervals. The band of one frequency may be, for instance, from 10 to 30 kHz, without limiting thereto, however.
  • the ultrasonic transmitter 102 directs the generated ultrasound towards the transmitter reflector 104.
  • the transmitter reflector 104 reflects the transmitted ultrasound to a solid angle.
  • the solid angle is two-dimensional, the first angular dimension of which may be denoted by angle ⁇ , which may be horizontal, and the second angular dimension by angle ⁇ , which may be vertical.
  • the angles ⁇ and ⁇ are mutually orthogonal.
  • the transmitter reflector 104 directs the ultrasound to a predetermined transmission sector 106 and in the second angular dimension ⁇ the transmitter reflector 104 directs the different frequencies fi to fN of the ultrasound as a function of frequency to different transmission sector parts 1160 to 1170, which correspond to the transmission sector parts 99 shown in Figure 1.
  • the transmitter reflector 104 is depicted in greater detail in Figures 3A and 3B.
  • the ultrasound reflects as an echo when encountering in a liquid 86 interfaces between the liquid and other matter. At least part of the echo may direct towards a set of receiver elements 110.
  • Each receiver element (e.g. 1100) in the set of the receiving elements 110 forms in said first angular dimension ⁇ a predetermined recep- ; tion sector part (e.g. 1080) oriented in a direction different from other receiving elements (e.g. 1102 to 1110).
  • the number M of the receiving elements 1100 to 1110 may be tens or hundreds, without limiting thereto, however.
  • All the reception sector parts ⁇ -t to ⁇ ⁇ 1080 to 1090, which correspond to the reception sector parts 98 of Figure 1 form together a combined reception sector 108, which covers completely, or for the most part, the transmission sector 106 of the first angular dimension ⁇ p.
  • the set of receiving elements 110 forms in the second angular dimension ⁇ a reception sector 114, which is completely, or at least for the most part, overlapping with the transmission sector parts ⁇ to ⁇ ⁇ 1160 to 1170 of different frequencies.
  • a combined transmission sector 116 comprises the transmission sector parts 1160 to 1170 of the different frequencies.
  • the set of receiving elements 110 converts the intensity of the received ultrasound to a corresponding electric signal and transmits the electric signal to a signal processing unit 112.
  • the signal processing unit 112 may convert analog signals to digital ones.
  • the signal processing unit 112 may separate the ultrasounds of different frequencies from one other on the basis of the frequency in the second angular dimension ⁇ .
  • the signal processing unit 112 may separate the ultrasounds arrived from different directions by means of the different directions of the reception sector parts 1080 to 1090 of the receiving elements 1100 to 1110 in the first angular dimension ⁇ .
  • the intensities of the frequency and direction separated ultrasounds allow formation of a two-dimensional matrix, which may be presented as a grey-scale image, for instance.
  • the signal processing unit 112 may thus produce an image on the basis of the directions of the reception sector parts 1080 to 1090 and the intensities of the ultrasounds transmitted at different frequencies in the directions of the different transmission sector parts 1160 to 1170.
  • the signal processing unit 112 may be a separate device part or a part of the controller 100.
  • FIG. 3A shows in greater detail the transmitter structure of ultrasound.
  • An ultrasonic transmitter 102 comprises an ultrasonic generator which may be based on an piezoelectric crystal, for instance.
  • the ultrasonic transmitter 102 may transmit ultrasound bursts at a desired burst frequency and, direct the ultrasound bursts towards a transmitter reflector 104, which may be an echelette reflector.
  • the grating comprises steps, the height of which may be denoted by letter d.
  • the parts hitting different steps mutually interfere and the wave front reflects from the transmitter reflector 104 such that between the incoming and outgoing fronts there is provided an angle a.
  • the transmitter reflector 104 may also converge or diverge the reflected ultrasound.
  • the transmitter reflector 104 may be box-like and its surface may be of metal, for instance, or of some other material having high acoustic impedance.
  • the surface may also be of plastic, for instance, and service conditions may be taken into account when adopting it.
  • the interior of the transmitter reflector 104 may be filled with air or, for instance, foamed plastic, such as polyurethane.
  • the surface material of the reflecting step structure may be one quarter of a wavelength in thickness and its acoustic impedance may be high (much higher than that of the surrounding liquid 86).
  • the transmitter reflector 104 may be pressurized inside. Additionally, it is possible to use support structures in the transmitter reflector 104 to enhance resistance.
  • Figure 3B is a top view of the transmitter reflector 104.
  • the stepped surface of the transmitter reflector 104 may be curved in the first angular dimension ⁇ , but it may also be straight.
  • FIG. 4 shows a set of receiving elements 1 10.
  • Each receiv- ing element 1100 to 11 10 may comprise a reception reflector 400, which reflects the ultrasound arriving in the reflector 400 to an ultrasonic sensor 402.
  • the ultrasonic sensor 402 may be a piezoelectric component of e.g. PZT (lead ; zirkonate titanate), PVDF (polyvinyledene fluoride) or the like.
  • the reception reflector 400 may be elliptical in the second angular dimension ⁇ , and in the first angular dimension ⁇ the reception reflector 400 may be straight.
  • the elliptical reception reflector 400 focuses the ultrasound well at medium-range distances within the range of about one metre to tens or hundreds of metres. A parabolic or a spherical reflector is not so suitable for these distances.
  • the reception reflector 400 may be made of metal or plastic.
  • Figure 5 illustrates phase coding of an ultrasonic pulse.
  • the ultrasonic transmitter 102 may produce digitally coded ultrasonic bursts.
  • Phase coding may be performed, for instance, with a Barker code having n chips.
  • Figure 5 shows 3-chip coding.
  • the ultrasound may be sampled, for instance, at a quadruple sampling frequency compared to the frequency of the ultrasound. The sampling frequency may also be higher.
  • the ultrasound may be determined both for amplitude and for phase (see vertical lines on either side of the zero line in Figure 5). Amplitude information and phase information, in turn, may be utilized in the manner of quadrature modulation.
  • the I (Inphase) and Q (Quadrature) samples of the quadra- ture modulation may be multiplied by a Barker code chip value (1 or -1 ) and the products may be summed up separately.
  • the Barker code may be used for pulse compression (compression ratio being in accordance with the chip number), which packages data of a plurality of samples in radial direction into one image pixel. With the Barker code it is possible to increase resolution and improve signal-to-noise ratio.
  • Figure 6 shows a two-dimensional image produced by the imaging apparatus.
  • the image is like a matrix, whose elements are pixels.
  • the image pixels in the column direction are distinguished from one another on the basis of frequencies fi to fN.
  • the image pixels in the row direction are distinguished from one another on the basis of reception sector parts ⁇ to ⁇ ⁇ .
  • the value of each pixel is in proportion to the intensity of the received ultrasound, for instance.
  • Figure 7 shows a series of images taken at different radial distances, by means of which series it is possible to produce a three- dimensional image.
  • Image Ri may have been taken closest to the transceiver 82 and image R « may have been taken furthest from the transceiver 82.
  • Other images R2 to RK-I may be taken somewhere therebetween.
  • Different images Ri to RK correspond to the image produced at different transit delays ti to t K , where each transit delay ti to t « corresponds to a distance r calculated on the basis of the velocity of ultrasound between the imaging area and the trans- DCver 82.
  • the signal processing unit 100 may generate a three- dimensional image on the basis of the intensities of the ultrasounds received from different directions of the reception sector parts ⁇ to ⁇ , at different frequencies fi to and with different delays.
  • images are taken at temporally consecutive instants, chronologically arranged images allow production of video image.
  • FIG. 8 is a flow chart of the method.
  • step 800 there is generated with an ultrasonic transmitter 102 an ultrasound consisting of a set of frequencies and it is directed towards a transmitter reflector 104.
  • the ultrasound is directed with the transmitter reflector 104 to a solid angle such that in a first angular dimension ⁇ the ultrasound is directed to a prede- termined transmission sector 106 and that in a second angular dimension ⁇ different frequencies of the ultrasound are directed as a function of the frequencies of different transmission sector parts 1080 to 1090.
  • step 804 there is formed with each receiver element 1 100 to 1 1 10 in the set of receiving elements 110 in said first angular dimension ⁇ a predetermined reception sector part oriented in a direction different from other receiving elements, all the reception sector parts 1 1000 to 1 1 10 together covering completely, or for the most part, the transmission sector 106 of the first angular dimension, and with the set of receiving elements 1100 to 1110 in the second angular dimension ( ⁇ ) there is formed a reception sector 114 which is completely, or at least for the most part, overlapping with the transmission sector 1 16 of the different frequencies, and the received ultrasounds are converted to corresponding electric signals and the electric signals are transmitted to a signal processing unit 12.
  • the signal processing unit 100 produces an image on the basis of the directions of the reception sector parts 1080 to 1090 and the intensities of the ultrasounds transmitted at different frequencies in the directions of the different transmission sector parts 1 160 to 1170.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

Un appareil d'imagerie comprend : un émetteur d'ultrasons (102) ; un émetteur-réflecteur (104) distinct ; un ensemble d'éléments de réception (110) comportant une pluralité d'éléments de réception (1100 à 1110) ; et une unité de traitement de signaux (112). L'émetteur d'ultrasons (102) génère un ultrason constitué d'un ensemble de fréquences et le dirige vers l'émetteur-réflecteur (104). Ledit émetteur-réflecteur (104) dirige l'ultrason vers un angle solide, dans une première dimension angulaire (<p) où l'émetteur-réflecteur dirige l'ultrason vers un secteur d'émission (106) prédéterminé, et dans une seconde dimension angulaire (Θ) où l'émetteur-réflecteur (104) dirige différentes fréquences de l'ultrason vers des parties de secteur d'émission (1080 à 1090) différentes en fonction de la fréquence. Chaque élément récepteur (1100 à 1110) de l'ensemble d'éléments de réception (110) forme dans ladite première dimension angulaire (φ) une partie de secteur de réception prédéterminée qui est orientée dans une direction différente des autres éléments de réception, toutes les parties de secteur de réception (1100 à 1110) recouvrant ensemble la totalité ou la majorité du secteur d'émission (106) de la première dimension angulaire, et l'ensemble d'éléments de réception (1100 à 1110) formant dans la seconde dimension angulaire (Θ) un secteur de réception (114) qui chevauche la totalité, ou au moins la majorité, du secteur d'émission (116) des fréquences différentes, qui convertit les ultrasons reçus en signaux électriques correspondants, et qui transmet les signaux électriques à une unité de traitement de signaux (112). Ladite unité de traitement de signaux (100) forme une image sur la base des intensités des ultrasons reçus à des fréquences différentes en provenance de différentes directions des parties de secteur de réception (1080 à 1090).
PCT/FI2011/051126 2010-12-22 2011-12-19 Procédé et appareil pour l'imagerie ultrasonore WO2012085339A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20106364 2010-12-22
FI20106364A FI20106364A (fi) 2010-12-22 2010-12-22 Menetelmä ja laite ultraäänikuvaukseen

Publications (1)

Publication Number Publication Date
WO2012085339A1 true WO2012085339A1 (fr) 2012-06-28

Family

ID=43415054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2011/051126 WO2012085339A1 (fr) 2010-12-22 2011-12-19 Procédé et appareil pour l'imagerie ultrasonore

Country Status (2)

Country Link
FI (1) FI20106364A (fr)
WO (1) WO2012085339A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015102611A1 (fr) * 2013-12-31 2015-07-09 Halliburton Energy Services, Inc. Impulsions d'entraînement codées pour un télémètre

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5923617A (en) * 1997-02-05 1999-07-13 The United States Of America As Represented By The Secretary Of The Navy Frequency-steered acoustic beam forming system and process
US6176829B1 (en) * 1998-02-26 2001-01-23 Echocath, Inc. Multi-beam diffraction grating imager apparatus and method
US20080130413A1 (en) * 2003-07-11 2008-06-05 Blue View Technologies, Inc. SYSTEMS AND METHODS IMPLEMENTING FREQUENCY-STEERED ACOUSTIC ARRAYS FOR 2D and 3D IMAGING

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5923617A (en) * 1997-02-05 1999-07-13 The United States Of America As Represented By The Secretary Of The Navy Frequency-steered acoustic beam forming system and process
US6176829B1 (en) * 1998-02-26 2001-01-23 Echocath, Inc. Multi-beam diffraction grating imager apparatus and method
US20080130413A1 (en) * 2003-07-11 2008-06-05 Blue View Technologies, Inc. SYSTEMS AND METHODS IMPLEMENTING FREQUENCY-STEERED ACOUSTIC ARRAYS FOR 2D and 3D IMAGING

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015102611A1 (fr) * 2013-12-31 2015-07-09 Halliburton Energy Services, Inc. Impulsions d'entraînement codées pour un télémètre
GB2532380A (en) * 2013-12-31 2016-05-18 Halliburton Energy Services Inc Encoded driving pulses for a range finder
AU2013409458B2 (en) * 2013-12-31 2017-05-25 Halliburton Energy Services, Inc. Encoded driving pulses for a range finder
GB2532380B (en) * 2013-12-31 2020-06-24 Halliburton Energy Services Inc Encoded driving pulses for a range finder
US10901104B2 (en) 2013-12-31 2021-01-26 Halliburton Energy Services, Inc. Encoded driving pulses for a range finder

Also Published As

Publication number Publication date
FI20106364A0 (fi) 2010-12-22
FI20106364A (fi) 2012-06-23

Similar Documents

Publication Publication Date Title
US20200264304A1 (en) Sonar data compression
EP1925949A1 (fr) Système sonar installé à bord d&#39;un navire
US11320534B2 (en) Ultrasonic detecting device and ultrasonic detecting method
JP2006052987A (ja) 前方探知ソナー及び水中画像表示装置
JP2016090452A (ja) 探知装置及び水中探知装置
US11846705B2 (en) Multimission and multispectral sonar
US20220026570A1 (en) Techniques for sonar data processing
CN107049361A (zh) 使用剪切波的声音速度成像
EP3018494A1 (fr) Appareil de détection ctfm et appareil de détection sous-marine
US10718865B2 (en) Method of compressing beamformed sonar data
JP6179973B2 (ja) 信号処理装置、水中探知装置、信号処理方法、及びプログラム
Pinto et al. Real-and synthetic-array signal processing of buried targets
WO2012085339A1 (fr) Procédé et appareil pour l&#39;imagerie ultrasonore
JP2679192B2 (ja) 海底地形表示装置
Saxena A review of shallow-water mapping systems
WO2011058527A1 (fr) Procédé et appareil pour traiter des signaux de sonar
CN116500625B (zh) 恢复成像方法、装置、系统、电子设备及可读存储介质
JP6757083B2 (ja) 音響測深装置及びマルチビーム音響測深装置
Morse A multi-purpose multibeam sonar for ROV applications
JP2008139144A (ja) 超音波送受信装置およびスキャニングソナー
Ferguson et al. Advances in high-frequency active sonars for countering asymmetric threats in littoral waters
JP2023510403A (ja) 指示可能なパラメトリック音響測深機、及び水中環境の海底下の一部を特徴付けるための方法
JP5098131B2 (ja) マルチビームソーナーおよびその信号処理方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11851779

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11851779

Country of ref document: EP

Kind code of ref document: A1