WO2007122262A1 - Sondeur multifaisceaux - Google Patents
Sondeur multifaisceaux Download PDFInfo
- Publication number
- WO2007122262A1 WO2007122262A1 PCT/EP2007/054097 EP2007054097W WO2007122262A1 WO 2007122262 A1 WO2007122262 A1 WO 2007122262A1 EP 2007054097 W EP2007054097 W EP 2007054097W WO 2007122262 A1 WO2007122262 A1 WO 2007122262A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- platform
- antennas
- frequency
- transmitting
- Prior art date
Links
- 230000033001 locomotion Effects 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 2
- 238000012937 correction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- 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
- G01S7/52015—Diversity 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
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
Definitions
- the present invention relates to a multibeam sounder for performing underwater predictive soundings, arranged on a marine or underwater platform.
- SMFs Current multibeam echosounders
- the sounder has no predictive capability and can only be used for vertical or lateral sampling.
- the present invention relates to a multibeam sounder for anticipating obstacles and points of interest (such as fixed obstacles or schools of fish in the case of a fishing vessel) that will meet the platform on its course, the anticipation distance can be advantageously substantially equal to the water level at the platform, this sonar is the most economical possible to achieve, while having good performance in resolution
- the sonar according to the invention comprises at least two transmitting-receiving antennas whose respective axes are forwardly offset in the direction of movement of the platform, these axes forming substantially a right angle between them and being symmetrical with respect to the axis of advance of the platform, the transmission frequency of the first antenna, equal to the reception frequency of the second, being different from the transmission frequency of the second, the latter frequency being equal to the reception frequency of the first.
- these transmission and reception frequencies are as close as possible to each other while being separable from one another by filtering.
- FIG. 1 is a simplified diagram illustrating various parameters relating to to a single transmitting antenna ultrasonore misaligned towards the front of its platform, in accordance with a part of implementation feature of the invention
- FIG. 2 is a simplified diagram illustrating various parameters relating to a single ultrasonic emission antenna which is off-axis with respect to the axis of advance of its platform, according to a portion of implementation characteristic of the invention.
- FIG. 3 is a simplified diagram illustrating the various parameters relating to a set of two ultrasound transmission antennas pointed forward and offset with respect to the axis of advance of their platform, in accordance with the invention. .
- the present invention will be described below with reference to a sonar having two multibeam antennas with linear geometry, but it is understood that the invention is not limited to this single example, and that it can be implemented with other types of antennas, for example antennas in a 2D network.
- FIGS. 1 and 2 there is shown a single antenna of the sonar device of the invention, namely the transmitting antenna, in order to simplify the explanations, by artificially decomposing its orientation first according to a misalignment towards the front (Figure 1), then by offsetting it with respect to the axis of advance of the platform ( Figure 2).
- Figure 3 there is shown the two sonar antennas, as they are to be oriented according to the invention. In these three figures, the same elements are assigned the same numerical references.
- FIG. 1 there is shown a single immersed transmitting antenna 1 disposed at a height H above the bottom of the water, the axis of this antenna being assumed horizontal.
- the platform supporting this antenna has not been represented.
- the generator 2 of the transmission cone of the antenna 1 has been represented in its position in the vertical plane containing the axis 3 of advance of its carrier platform, which is also here the axis of the emission cone of the antenna 1.
- the opening angle of this emission cone is called ⁇ .
- this angle ⁇ is between 30 ° and 60 ° approximately.
- the emission cone of this antenna 1 intersects the bottom water in a geometric figure 4 (called “mowed") of generally hyperbolic form (it could be of parabolic or elliptical shape depending on the value of the angle ⁇ , that is to say, for example, depending on the pitch of the platform).
- the generator 2 of this cone starts from the center 5 of the antenna 1 (which is also the top of this cone) and intersects the bottom of the water at a point 6.
- the vertical 7 lowered from the top 5 intersects the bottom of the at a point 8.
- the distance between points 6 and 8 is denoted x.
- the swath 4 has a non-zero width ⁇ x depending on the length L of the transmitting antenna, the ras emission height, the height H, and the wavelength ⁇ according to the formula :
- the longitudinal resolution is defined by the formula:
- the longitudinal resolution and the width of the swath are confounded.
- the resolution will be much better in general than the width of the swath, because it depends essentially on the band B of the emitted signal.
- the receiving antenna may be a linear antenna or a 2D array of elementary antennas whose pointing in site is adapted to the geometry of the swath.
- the waves reflected by the background on the receiving antenna have a variable site of ⁇ 1 to ⁇ 2 (relative to the horizontal plane) according to the position of the reflector in the swath; it is therefore necessary that the opening in site of the receiving antenna is sufficient to avoid attenuating the acoustic waves reflected by the objects of the swath insonified, or, for 2D networks, it is necessary to plan to point the antenna in site in this same range of values from ⁇ 1 to ⁇ 2.
- FIG. 2 shows the same transmitting antenna 1 as in FIG. 1, but off-axis, in a horizontal plane passing through the center 5 of the antenna, by an angle ⁇ / 2 with respect to the axis 3 of advancement of the platform.
- the swath 9 that it produces is, of course, different from the swath 4, but here has a substantially hyperbolic shape.
- the receiving antenna (not shown), disposed in the same horizontal plane as the antenna 1, thus forms with the latter an angle advantageously equal to about 90 °.
- This misalignment of the two antennas together with their forward misalignment facilitates corrections of disturbances of information received by the receiving antenna, disturbances due in particular to yaw motions of the platform.
- platform roll, pitch and yaw motions affect the properties of the insonification of the transmit antenna of a conventional multibeam echosounder.
- the pitching causes a misalignment of the beam forward and backward that can be corrected by electronic pointing.
- the roll has very little effect on the insonification and therefore does not need to be corrected, except at the reception.
- the lace has a very important effect and can not be corrected in a simple way.
- the grating lobes of the receiving antenna are not too troublesome because the misalignment of the transmitting antenna ensures, at a given instant, an insonification in only one of the ambiguous directions of the receiving antenna, and thus, for the same number of reception channels, it is possible to manage antennas of larger dimensions, therefore with a better resolution, which is not possible with conventionally configured antennas, where the receiving antenna is perpendicular to the antenna. transmission antenna, and for which there are therefore always reception times for which the echoes are present in two ambiguous directions.
- FIG. 3 shows, in addition to the first antenna 1 (oriented as in FIG. 2), the second antenna 10, symmetrical with the antenna 1 with respect to the axis 3.
- these two antennas form between them an angle ⁇ preferably equal to 90 °.
- the angle ⁇ may be different from 90 ° and the additional antennas are advantageously receiving antennas which are preferably either perpendicular to the road of the platform, or perpendicular to the two transmitting antennas.
- the system comprises, in addition to the two transmitting antennas, a single receiving antenna, possibly subsampled, as explained above.
- there are two receiving antennas associated with the two transmitting antennas. The swath produced by the antenna 10 is referenced 11.
- the antenna 1 transmits at a frequency fi and receives at a frequency f2, while the antenna 10 transmits at the frequency f2 and receives at the frequency f1.
- the condition to be respected for these two frequencies is that they are close enough to each other to be able to be located in the bandwidth of the two antennas and that they can be separated spectrally by the reception devices connected to these antennas.
- the advantage of this antenna configuration is to combine the advantages of misalignment, misalignment and to operate the two antennas at different transmission frequencies. These advantages are, in particular: > The longitudinal resolution is much better than that of a simple SMF,
- the forward misalignment makes it a navigation instrument suitable for ensuring the safety of the building constituting the carrier platform,
- the weak shading provides an insonification similar to that of a lateral sonar and well adapted to topographic surveys
- the principle of the correction consists in using classical attitude measurements (carried out using an angular control unit) to define the rotation undergone by the antenna system and to impose as the pointing direction of each antenna the nominal direction of the antenna in the absence of rotation. It is thus ensured that, in the zone before "the insonification is not too disturbed by parasitic rotations (of course, these effects will be felt outside the front zone, but with more manageable consequences). It should also be noted that some manufacturers use two antennas (one of each edge) to improve the correction, but in a configuration with two transmit antennas parallel to each other and independent.
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)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Radar Systems Or Details Thereof (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07728552.6A EP2010938B1 (fr) | 2006-04-26 | 2007-04-26 | Sondeur multifaisceaux |
NZ573058A NZ573058A (en) | 2006-04-26 | 2007-04-26 | Sonar with two symmetrically mounted off axis antennas using mutually reversed Rx and Tx frequencies |
JP2009507078A JP5358852B2 (ja) | 2006-04-26 | 2007-04-26 | 多重ビーム測深機 |
AU2007242767A AU2007242767B2 (en) | 2006-04-26 | 2007-04-26 | Multibeam sounder |
US12/298,415 US8077548B2 (en) | 2006-04-26 | 2007-04-26 | Multibeam sounder |
CA2650524A CA2650524C (fr) | 2006-04-26 | 2007-04-26 | Sondeur multifaisceaux |
NO20084689A NO343372B1 (no) | 2006-04-26 | 2008-11-06 | Multistråledybdemåler |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0603736A FR2900474B1 (fr) | 2006-04-26 | 2006-04-26 | Sondeur multifaisceaux |
FR0603736 | 2006-04-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007122262A1 true WO2007122262A1 (fr) | 2007-11-01 |
Family
ID=37668256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/054097 WO2007122262A1 (fr) | 2006-04-26 | 2007-04-26 | Sondeur multifaisceaux |
Country Status (9)
Country | Link |
---|---|
US (1) | US8077548B2 (fr) |
EP (1) | EP2010938B1 (fr) |
JP (1) | JP5358852B2 (fr) |
AU (1) | AU2007242767B2 (fr) |
CA (1) | CA2650524C (fr) |
FR (1) | FR2900474B1 (fr) |
NO (1) | NO343372B1 (fr) |
NZ (1) | NZ573058A (fr) |
WO (1) | WO2007122262A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101907707A (zh) * | 2010-07-02 | 2010-12-08 | 哈尔滨工程大学 | 用于多波束合成孔径声呐的组合声基阵 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003081172A1 (fr) * | 2002-03-25 | 2003-10-02 | Council Of Scientific And Industrial Research | Classification de la rugosite du plancher oceanique par som et lvq |
EP1426786A1 (fr) * | 2001-09-13 | 2004-06-09 | Institute of Acoustics, Chinese Academy of Sciences | Systeme de sonar bathymetrique haute resolution et procede de mesure de la physionomie du fond marin |
US20050007882A1 (en) | 2003-07-11 | 2005-01-13 | Blue View Technologies, Inc. | Systems and methods implementing frequency-steered acoustic arrays for 2D and 3D imaging |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3005973A (en) * | 1954-02-13 | 1961-10-24 | Atlas Werke Ag | Submarine locating system |
FR2431137A2 (fr) * | 1977-12-20 | 1980-02-08 | Inst Francais Du Petrole | Sonar pour obtenir une representation topographique d'une surface immergee et des couches sous-jacentes |
US4970700A (en) * | 1989-11-20 | 1990-11-13 | Westinghouse Electric Corp. | Sonar apparatus |
US5412618A (en) * | 1994-04-07 | 1995-05-02 | Westinghouse Electric Corporation | Spotlight-mode synthetic aperture side-look sonar |
US5537366A (en) * | 1995-07-03 | 1996-07-16 | Northrop Grumman | Buried cable pipe detection sonar |
US5602801A (en) * | 1995-12-06 | 1997-02-11 | The United States Of America As Represented By The Secretary Of The Navy | Underwater vehicle sonar system with extendible array |
JP4516644B2 (ja) * | 1999-09-29 | 2010-08-04 | 古野電気株式会社 | 受波ビーム形成方法、受波ビーム形成装置およびマッチドフィルタ |
US6678210B2 (en) * | 2001-08-28 | 2004-01-13 | Rowe-Deines Instruments, Inc. | Frequency division beamforming for sonar arrays |
JP4791011B2 (ja) * | 2004-07-02 | 2011-10-12 | 古野電気株式会社 | 超音波送波器、超音波送受波器およびこれを用いた探知装置 |
JP4810810B2 (ja) * | 2004-08-26 | 2011-11-09 | 日本電気株式会社 | ソーナー方法及び水中画像ソーナー |
-
2006
- 2006-04-26 FR FR0603736A patent/FR2900474B1/fr not_active Expired - Fee Related
-
2007
- 2007-04-26 WO PCT/EP2007/054097 patent/WO2007122262A1/fr active Application Filing
- 2007-04-26 CA CA2650524A patent/CA2650524C/fr active Active
- 2007-04-26 JP JP2009507078A patent/JP5358852B2/ja active Active
- 2007-04-26 NZ NZ573058A patent/NZ573058A/en unknown
- 2007-04-26 US US12/298,415 patent/US8077548B2/en active Active
- 2007-04-26 EP EP07728552.6A patent/EP2010938B1/fr active Active
- 2007-04-26 AU AU2007242767A patent/AU2007242767B2/en active Active
-
2008
- 2008-11-06 NO NO20084689A patent/NO343372B1/no unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1426786A1 (fr) * | 2001-09-13 | 2004-06-09 | Institute of Acoustics, Chinese Academy of Sciences | Systeme de sonar bathymetrique haute resolution et procede de mesure de la physionomie du fond marin |
WO2003081172A1 (fr) * | 2002-03-25 | 2003-10-02 | Council Of Scientific And Industrial Research | Classification de la rugosite du plancher oceanique par som et lvq |
US20050007882A1 (en) | 2003-07-11 | 2005-01-13 | Blue View Technologies, Inc. | Systems and methods implementing frequency-steered acoustic arrays for 2D and 3D imaging |
Also Published As
Publication number | Publication date |
---|---|
US20090175127A1 (en) | 2009-07-09 |
NO20084689L (no) | 2009-01-16 |
US8077548B2 (en) | 2011-12-13 |
AU2007242767A1 (en) | 2007-11-01 |
FR2900474A1 (fr) | 2007-11-02 |
CA2650524C (fr) | 2014-09-16 |
EP2010938A1 (fr) | 2009-01-07 |
EP2010938B1 (fr) | 2014-05-21 |
AU2007242767B2 (en) | 2011-07-21 |
FR2900474B1 (fr) | 2008-06-13 |
CA2650524A1 (fr) | 2007-11-01 |
JP2009534679A (ja) | 2009-09-24 |
NZ573058A (en) | 2011-08-26 |
JP5358852B2 (ja) | 2013-12-04 |
NO343372B1 (no) | 2019-02-11 |
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