EP2936198A2 - Antenne sous-marine, méta-antenne sous-marine et véhicule nautique - Google Patents

Antenne sous-marine, méta-antenne sous-marine et véhicule nautique

Info

Publication number
EP2936198A2
EP2936198A2 EP13824295.3A EP13824295A EP2936198A2 EP 2936198 A2 EP2936198 A2 EP 2936198A2 EP 13824295 A EP13824295 A EP 13824295A EP 2936198 A2 EP2936198 A2 EP 2936198A2
Authority
EP
European Patent Office
Prior art keywords
subantenna
underwater
antenna
underwater antenna
antenna according
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP13824295.3A
Other languages
German (de)
English (en)
Inventor
Arne Kraft
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Elektronik GmbH
Original Assignee
Atlas Elektronik GmbH
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 Atlas Elektronik GmbH filed Critical Atlas Elektronik GmbH
Publication of EP2936198A2 publication Critical patent/EP2936198A2/fr
Withdrawn legal-status Critical Current

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
    • G01S15/8902—Side-looking sonar
    • G01S15/8904—Side-looking sonar using synthetic aperture techniques
    • 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
    • G01S7/526—Receivers
    • 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
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • G10K11/346—Circuits therefor using phase variation
    • 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
    • G01S7/52003—Techniques for enhancing spatial resolution of targets

Definitions

  • the invention relates to an underwater antenna for receiving underwater sound signals having a first subantenna and a second subantenna, the first subantenna and the second subantenna each having at least one receiving element, and a meta-underwater antenna and a watercraft carrying the underwater antenna or the meta Underwater antenna has.
  • the underwater antennas are linear antennas with individual receiving elements
  • Such synthetic aperture underwater antennas are in particular constructed such that the underwater vehicle is displaced by exactly the length in each case, that the first receiving element at the position of the last received element is moved and then another measurement takes place.
  • Correlation method then obtains a speed or location or navigation information.
  • the underwater vehicle Due to the short length of the synthetic aperture underwater antenna, the underwater vehicle is restricted in its navigation at high speeds. It is true that the vehicle between two localizations as described above can continue only by the length of the antenna, so it is the slower the shorter the antenna. If now in the water long ranges are to be achieved, one must wait longer at one point, until the sound has covered the way. It can thus be achieved with short antennas only short ranges. From a propulsion speed and the range results in the search area per time. The main point is that the search area gets smaller and smaller with shorter antennas per time.
  • the object of the invention is to improve the state of the art.
  • an underwater antenna for receiving underwater sound signals in particular a SAS antenna, having a first subantenna and a second subantenna, the first subantenna and the second subantenna each having at least one receiving element and the first subantenna and the second subantenna Subantenne form a spatial distance.
  • underwater antennas can be provided, which also have a synthetic aperture, but when used underwater vehicles can use higher speeds.
  • underwater antennas can continue to operate with defective receiving elements.
  • a surface search power of these antennas increases significantly.
  • the mechanical structure can be significantly reduced in size.
  • the energy consumption (power consumption) can be reduced.
  • lower frequencies can be used, which increases the range with lower transmission power.
  • a "support point" is provided which higher speeds of a water or
  • Receiving underwater sound signals It is designed in particular as a linear antenna whose
  • Underwater antenna can be used as SAS antenna (SAS is the abbreviation of "Synthetic Aperture SONAR").
  • the usable "underwater sound signals” are in particular the sound signals that are used for sonars and echosounders.
  • the "subantennas” each have at least one receiving element, which in its simplest form is a hydrophone (underwater microphone) which converts a sound pressure into an electrical signal.
  • a hydrophone underwater microphone
  • the "distance" is at usual
  • the spatial distance of real subantennas is according to the state of the art a maximum of twice the antenna resolution.
  • the present spatial spacing according to the invention is designed so that an additional distance is added to the usual distance between two receiving elements.
  • the spatial distance 10%, 20%, 40%, 75%, 100%, 150%, 200%, 350% or more be greater than the antenna resolution. This spatial distance may well correspond to the length of the first subantenna and thus the total length of all receiving elements or go beyond.
  • the spatial distance corresponds to the total extent of all the reception elements of the first subantenna minus a width of a reception element.
  • a spatial distance can be given when a transmitting element is turned off or is defective.
  • the spatial distance has a minimum vectorial value of 1.0mm, 2.0mm, 1cm, 3cm, 10cm, 30cm, 70cm, 1.0m, 3m, 10m, 30m or 70m.
  • underwater antennas of different dimensions can be provided, also
  • Underwater antennas are provided with different synthetic aperture properties. Furthermore, the first and the second subantenna can not only have a length offset, but also only one or additionally a height offset.
  • Underwater antenna having a transmitting element.
  • the transmitting element can be, for example, the transmitting device of a sonar or a sonar, which impress a sound pressure, for example, via a piezoceramic of the water environment.
  • the first subantenna has the transmitting element.
  • existing underwater antennas can be used to construct the underwater antenna according to the invention.
  • the first subantenna can have further reception elements, in particular a total of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or more receiving elements.
  • the underwater antenna may have further subantennas, which have a subantenna spatial distance from each other and to the first subantenna and to the second subantenna.
  • the second subantenna and / or one of the further subantenna s further receiving elements, in particular 2, 3, 4, 5 or more receiving elements.
  • the first sub-antenna may have seven receiving elements
  • the second sub-antenna may be a single receiving element
  • the third sub-antenna may be two
  • Receiving elements and the fourth sub-antenna have four receiving elements.
  • the position of an underwater vehicle can also be determined for very high speeds.
  • the underwater antenna can be designed as a linear antenna.
  • the underwater antenna can be set up such that in each case a phase center between the transmitting element and each receiving element of all subantennas or individual subantennas can be determined.
  • a "phase center” is in particular electronic reference information of an antenna, which can be determined computer-controlled between the transmitter and each individual receiver element the respective receiving element is located.
  • a local phase reference pattern may have an irregularity, which is particularly due to the spatial distance.
  • an effective underwater antenna for micro-navigation of an underwater vehicle can be provided.
  • Phase reference pattern identical ie the individual phase centers have an equidistant distance.
  • this equidistant distance is not necessarily given over all the receiving elements.
  • the object is achieved by a meta-underwater antenna, which has a subsea antenna described above and which is designed such that at a location offset of the above-described underwater antenna in a direction of the second sub-antenna or in one direction Further subantennas, a signal information determined by means of the second subantenna or by means of the further subantennas, a position information can be determined.
  • a meta-underwater antenna can be provided with a synthetic aperture, which makes it possible to ensure navigation underwater at higher speeds of an underwater vehicle.
  • the position information can be determined by means of a correlation, in particular a cross-correlation.
  • the received signal of the further subantennas can be determined to a first position in the case of subantennas changed in position, for example to a second position.
  • the mathematical correlation and in particular the mathematical cross-correlation, can take place by means of a computer or an FPGA which evaluates the signals at the individual receiving elements.
  • the particular signal information may be a phase-shift signal.
  • the object is achieved by a watercraft, in particular by an underwater vehicle, which has a previously described underwater antenna and / or a meta-underwater antenna described above.
  • the vessel can navigate underwater and locate highly accurately, and even at very high speeds, without costly underwater antennas with extended and many expensive receivers.
  • Figure 1 is a schematic representation of a
  • FIG. 2 is a schematic representation of a location
  • Time diagram with a moving linear antenna with two sub-antennas, 3 shows an underwater vehicle with a
  • Figure 4 is a schematic representation of
  • Phase centers of a linear antenna with three subantennas Phase centers of a linear antenna with three subantennas.
  • a whole underwater antenna 105 has a first sub-antenna 107, a second sub-antenna 109, and a third sub-antenna 111.
  • the first sub-antenna 107 has a transmitting element 127 and five individual receiving elements (121).
  • the transmitting element is denoted by Tx and the receiving elements by RX.
  • the index at the R indicates the sub antenna
  • the index at the X indicates the number of the individual receiver element.
  • a first distance 141 follows, followed by the second sub-antenna 109 with the receiving element 123.
  • This subantenna 109 is followed at a second distance 143 by the third subantenna 111 with three receiving elements 125. All receiving elements are designed as hydrophones.
  • the transmitting elements 4 and 5 of the first sub-antenna are omitted for the purpose of simplification.
  • the overall antenna 105 At a first time 1 (time axis 254), the overall antenna 105 has a first starting location Xi. Since the overall antenna 105 moves to the right, it has a second start position x 2 at a second time 2.
  • the relevant phase center has the same position as the corresponding phase center of the second subantenna at time 1, the speed or position data can be determined with sufficient accuracy.
  • An overall antenna 105 is presently arranged on a submarine 371.
  • the entire antenna is arranged on a ship below the water surface.
  • a micro-navigation of the submarine 371 via the overall antenna 105 take place with the sub-antenna 109 below the water surface 361.
  • the entire antenna 105 has a first sub-antenna 107, a second sub-antenna 109, and a third sub-antenna 111 as described above.
  • phase center Pi results from the phase centroid TX / RiXi, the phase center P 2 from TX / RiX 2 , etc., and the phase center P 5 from TX / R 2 Xi and the phase center P 6

Landscapes

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

Abstract

L'invention concerne une antenne sous-marine. Du fait de la faible longueur de l'antenne sous-marine à ouverture synthétique, le véhicule sous-marin est limité dans sa navigation aux grandes vitesses. L'invention propose une antenne sous-marine destinée à recevoir des signaux sonores sous-marins comportant une première sous-antenne et une seconde sous-antenne, la première sous-antenne et la seconde sous-antenne présentant chacune au moins un élément récepteur et la première sous-antenne et la seconde sous-antenne formant une distance d'écartement dans l'espace. De cette façon, il est possible de réaliser des antennes sous-marines qui disposent de même d'une ouverture synthétique mais par l'utilisation desquelles des véhicules sous-marins peuvent utiliser de plus grandes vitesses. En supplément, les antennes sous-marines peuvent continuer à être utilisées avec des éléments récepteurs défectueux.
EP13824295.3A 2012-12-19 2013-11-25 Antenne sous-marine, méta-antenne sous-marine et véhicule nautique Withdrawn EP2936198A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012112679.8A DE102012112679A1 (de) 2012-12-19 2012-12-19 Unterwasserantenne, Meta-Unterwasserantenne und Wasserfahrzeug
PCT/DE2013/100394 WO2014094727A2 (fr) 2012-12-19 2013-11-25 Antenne sous-marine, méta-antenne sous-marine et véhicule nautique

Publications (1)

Publication Number Publication Date
EP2936198A2 true EP2936198A2 (fr) 2015-10-28

Family

ID=50002384

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13824295.3A Withdrawn EP2936198A2 (fr) 2012-12-19 2013-11-25 Antenne sous-marine, méta-antenne sous-marine et véhicule nautique

Country Status (3)

Country Link
EP (1) EP2936198A2 (fr)
DE (1) DE102012112679A1 (fr)
WO (1) WO2014094727A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201740870U (zh) * 2010-07-08 2011-02-09 中国人民解放军海军工程大学 一种拖曳线列阵水听器组
US20120250457A1 (en) * 2011-03-28 2012-10-04 Pgs Americas, Inc. Systems and methods for wireless communication in a geophysical survey streamer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987563A (en) * 1990-02-07 1991-01-22 Westinghouse Electric Corp. Synthetic aperture minimum redundancy sonar apparatus
US6912176B2 (en) * 2003-10-30 2005-06-28 Northrop Grumman Corporation Active element array apparatus for displaced phase center systems
US7342847B1 (en) * 2006-10-03 2008-03-11 The United States Of America As Represented By The Secretary Of The Navy Method of estimating along-track displacement of an underwater vehicle
JP5497302B2 (ja) * 2009-01-30 2014-05-21 株式会社日立製作所 合成開口ソーナー
JP5443891B2 (ja) * 2009-08-11 2014-03-19 株式会社日立製作所 合成開口ソーナー

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201740870U (zh) * 2010-07-08 2011-02-09 中国人民解放军海军工程大学 一种拖曳线列阵水听器组
US20120250457A1 (en) * 2011-03-28 2012-10-04 Pgs Americas, Inc. Systems and methods for wireless communication in a geophysical survey streamer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014094727A2 *

Also Published As

Publication number Publication date
WO2014094727A2 (fr) 2014-06-26
DE102012112679A1 (de) 2014-06-26
WO2014094727A3 (fr) 2014-11-13

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