EP1253666B1 - Underwater antenna - Google Patents

Underwater antenna Download PDF

Info

Publication number
EP1253666B1
EP1253666B1 EP02001535A EP02001535A EP1253666B1 EP 1253666 B1 EP1253666 B1 EP 1253666B1 EP 02001535 A EP02001535 A EP 02001535A EP 02001535 A EP02001535 A EP 02001535A EP 1253666 B1 EP1253666 B1 EP 1253666B1
Authority
EP
European Patent Office
Prior art keywords
underwater antenna
antenna according
components
underwater
housing
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.)
Expired - Lifetime
Application number
EP02001535A
Other languages
German (de)
French (fr)
Other versions
EP1253666A3 (en
EP1253666A2 (en
Inventor
Rainer Dr. Busch
Walter Dr. Sachs
Christoph Hoffmann
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 EP1253666A2 publication Critical patent/EP1253666A2/en
Publication of EP1253666A3 publication Critical patent/EP1253666A3/en
Application granted granted Critical
Publication of EP1253666B1 publication Critical patent/EP1253666B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/04—Adaptation for subterranean or subaqueous 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
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys

Definitions

  • the invention relates to an underwater antenna of the genus defined in the preamble of claim 1.
  • Such underwater antennas are useful in certain applications, e.g. in conjunction with a mine search or protection sonar or a sediment sonar for seafloor seismic surveys, subjected to significant shock loads from blast waves generated by detonations.
  • further components and assemblies are included, e.g. Electronic components, such as preamplifiers, transmission transformers, chokes, etc. These components are housed in a housing formed in the housing and mounted on a holder, which in turn is fixed in the housing.
  • a known underwater towed antenna (EP 0944127 A2 ) has a flexible tube made of polyethylene, in which a plurality of gel bodies are lined up one behind the other.
  • hydrophones are molded with electronic components for operating the hydrophones.
  • the elastic gel bodies are introduced into the tube together with oil.
  • the gel bodies absorb oil swelling and fill the tube after the swelling process without blistering.
  • the casting of a gel body takes place in a tubular mold with an inlet nozzle and a riser. Gel is poured into the tube via the inlet nozzle.
  • a gel layer is formed in the mold on which the hydrophones and electronic components are placed.
  • liquid gel is filled until the mold is filled with gel, escaping over the riser in the mold existing air, so that after setting the gel body has no air bubbles.
  • a likewise known submerged towed antenna ( DE 195 18 461 C1 ) has an elastic, tubular casing and a plurality of hydrophones arranged centrally and at a fixed longitudinal distance from each other.
  • the tubular envelope is made of polyethylene with a specific gravity of> 1 gr / cm 3 and completely filled with a hydrophone immediately enclosing, soft gel.
  • a known transducer element, in particular hydrophone, for an underwater antenna has a piezoelectric element with a jacket which covers its side surfaces extending parallel to the polarization direction.
  • the sheath consists of a syntactic foam or an elastic or viscoelastic plastic with gas-filled micro-bubbles, wherein the micro-bubbles are preferably concentrated on the outer surfaces.
  • the transducer elements are provided with a cladding of sound-transparent encapsulation material, eg polyurethane.
  • the invention has for its object to reduce in an underwater antenna of the type described above, the forces acting on impact on the components of the housing of the underwater antenna upon impact of triggered by explosions in the water pressure waves.
  • the underwater antenna according to the invention has the advantage that by filling the receiving space with impedance-matched to water filler impinging on the underwater antenna pressure wave is not reflected at the boundary layer to the hollow receiving space, but passes through the entire housing of the underwater antenna without significant reflections. Since no reflection wave is formed, which is superimposed on the incoming pressure wave, the components are accelerated by the pressure wave much less than in an air-filled receiving space, by about half.
  • the filling on the one hand exerts a mechanical support function for the components and on the other hand prevented by the complete enclosure of the components, that they get into resonance and there is a further increase in the forces acting on the components oscillating force, the so-called. Resonance peaking, comes again would cause a doubling of the acceleration value. Overall, thus occur by the filling of the receiving space to the components lower forces, which lower requirements for the shock resistance of the components and lower demands on the bearing forces for the Fasteners of the components provides. Both reduce the cost of manufacturing the underwater antenna.
  • the filler is a liquid or a gel.
  • a liquid filling facilitates the replacement or repair of components. This also applies to fillings with a gel, if the gel has the property to become fluid when heated.
  • the underwater antenna shown as a constructional embodiment is preferably used for mine detection and is an essential sensor of a mine avoidance system.
  • the antenna has a closed housing 10 with a closed rigid housing 10 which is fixed to the free end of a carrier 12.
  • the carrier 12 is held axially displaceable in the hull of a watercraft, in particular a submarine, so that the antenna can be retracted and extended through an opening in the fuselage bottom. Possibly. the carrier 12 is also designed to be rotatable about its longitudinal axis.
  • the underwater antenna has a so-called.
  • Surface array forming transducer assembly 13 from a plurality of individual, horizontally and vertically spaced from each other arranged transducers 131, which are embedded in an encapsulation 14 made of plastic, eg polyurethane.
  • the transducer assembly 13 is received in the front region of the housing 10 and secured to a housing 10 in the transversely extending mounting plate 15.
  • a receiving space 16 for further components 17 of the antenna is provided in the housing 10.
  • These components 17 are, for example, preamplifiers, transformer transformers, chokes or other electronic components.
  • components 17 are fastened to the mounting plate 15 via suitable fastening pins 18.
  • Fig. 1 only schematically illustrated components 17 are in a structural design in Fig. 2 to see. They each have a double-layer printed circuit board 19 on which the electronic components are mounted and electrically connected to each other. Each circuit board 19 is already over mentioned fastening pins 18 fixed to the mounting plate 15. Attached to the mounting plate 15 connectors 20 establish the electrical connection between the electronic components and the transducers 131 of the transducer assembly 13 ago.
  • the entire receiving space 16 is filled with a filler 21 whose acoustic impedance is approximated to that of the water.
  • a pressure wave which is triggered, for example, by the explosion of a mine, with a pressure amplitude p 0 on the transducer assembly 13, the pressure amplitude p 0 remains when passing through the encapsulation 14, which has an acoustic impedance comparable to the water, approximately obtained and meets the interface between encapsulation 14 and filler 21.
  • ⁇ is the mass density
  • c the speed of sound
  • ⁇ the 1 / e-width
  • the 1 / e width is the time span in which the pressure amplitude p (t) of the pressure wave normalized to the pressure amplitude p 0 has decayed to the value 1 / e.
  • a 1 / e width of ⁇ 1 ⁇ 10 -3 sec
  • a speed of sound c 1500 m / sec
  • the impedance matched filler 21 in the receiving space 16 is not present, but this only air-filled, so would the Pressure wave at the interface between the encapsulation 14 and receiving space 16 is reflected and superimpose the reflection wave of the pressure wave.
  • the pressure amplitude acting on the mounting plate 15 would double, so that twice as high bearing forces would be required to prevent detachment of the components 17 from the mounting plate 15.
  • FIG. Fig. 3 and 4 are the acceleration ratios described above for air-filled receiving space 16 (FIG. Fig. 3 ) and in filled with impedance matched filler 21 receiving space 16 illustrated.
  • the acceleration of the knot A by the filler 21 is considerably reduced. Such a reduction is even greater, considering that when the air-filled receiving space 16 on the mounting plate 15, a resonance increase can occur when 1 / ⁇ the resonant frequency of the storage of the components 17 corresponds.
  • the filler 21 is preferably a liquid, e.g. Oil or gel used that is flowable by heating. With such a filler 21, the receiving space 16 can be emptied for the purpose of repair or replacement of the components 17.
  • a liquid potting material e.g. Polyurethane, which hardens.

Abstract

An underwater aerial comprising a housing (10) containing an integral transducer unit (13) made of numerous electro-acoustic transducers (131), and transducer operating components (17). The latter are fixed in place by holders (15), and are located in a receiving area (16) filled with a filler material whose acoustic impedance is close to that of water. The filler material is polyurethane.

Description

Die Erfindung betrifft eine Unterwasserantenne der im Oberbegriff des Anspruchs 1 definierten Gattung.The invention relates to an underwater antenna of the genus defined in the preamble of claim 1.

Solche Unterwasserantennen sind bei bestimmten Anwendungen, z.B. in Verbindung mit einem Minensuch- oder -schutzsonar oder einem Sedimentsonar für seismische Untersuchungen im Meeresboden, erheblichen Schockbelastungen durch Druckwellen ausgesetzt, die von Detonationen erzeugt werden. Im Antennengehäuse solcher Unterwasserantennen sind neben den elektroakustischen Wandlern zum Schallempfang oder zum Schallsenden noch weitere Bauteile und Baugruppen enthalten, so z.B. Elektronikkomponenten, wie Vorverstärker, Übertragungstransformatoren, Drosseln etc. Diese Bauteile sind in einem im Gehäuse ausgebildeten Aufnahmeraum untergebracht und auf einem Halter befestigt, der seinerseits im Gehäuse festgelegt ist.Such underwater antennas are useful in certain applications, e.g. in conjunction with a mine search or protection sonar or a sediment sonar for seafloor seismic surveys, subjected to significant shock loads from blast waves generated by detonations. In the antenna housing of such underwater antennas, in addition to the electroacoustic transducers for sound reception or sound emission, further components and assemblies are included, e.g. Electronic components, such as preamplifiers, transmission transformers, chokes, etc. These components are housed in a housing formed in the housing and mounted on a holder, which in turn is fixed in the housing.

Bei solchen Schockbelastungen treten an diesen Bauteilen der Unterwasserantennen erhebliche Kräfte auf, so daß die Bauteile daher besonders schockfest ausgelegt werden müssen. Aber auch die Befestigung der Bauteile an dem Halter und des Halters im Gehäuse müssen extrem hohe Kräfte auffangen können und entsprechend ausgelegt werden. Beides führt zu einer erheblichen Steigerung der Herstellungskosten einer solchen Unterwasserantenne.In such shock loads occur on these components of the underwater antennas considerable forces, so that the components must therefore be designed to be particularly resistant to shock. But the attachment of the components to the holder and the holder in the housing must be able to absorb extremely high forces and be designed accordingly. Both lead to one significant increase in the cost of such an underwater antenna.

Eine bekannte Unterwasser-Schleppantenne ( EP 0944127 A2 ) weist einen flexiblen Schlauch aus Polyäthylen auf, in dem eine Mehrzahl von Gelkörpern hintereinander aufgereiht sind. In den Gelkörper sind Hydrophone mit elektronischen Bauteilen zum Betreiben der Hydrophone eingegossen. Um Lufteinschlüsse im Akustikteil zu vermeiden wird der Gelkörper mit eingeschlossenen Hydrophonen und Bausteinen außerhalb des Schlauches gegossen, wobei der Durchmesser des Gelkörpers kleiner ist als der Durchmesser des Schlauchs. Die elastischen Gelkörper werden zusammen mit Öl in den Schlauch eingebracht. Die Gelkörper nehmen Öl quellend auf und füllen so den Schlauch nach dem Quellprozess ohne Blasenbildung. Das Gießen eines Gelkörpers erfolgt in einer rohrförmigen Gussform mit einem Einlaufstutzen und einem Steiger. Über den Einlaufstutzen wird Gel in das Rohr eingefüllt. Nach dem Abbinden bildet sich in der Gussform eine Gelschicht auf die die Hydrophone und elektronischen Bauteile aufgelegt werden. Beim weiteren Herstellungsvorgang wird flüssiges Gel solange eingefüllt, bis die Gussform mit Gel gefüllt ist, wobei über den Steiger in der Gussform vorhandene Luft entweicht, so dass nach dem Abbinden der Gelkörper keine Luftblasen aufweist.A known underwater towed antenna ( EP 0944127 A2 ) has a flexible tube made of polyethylene, in which a plurality of gel bodies are lined up one behind the other. In the gel body hydrophones are molded with electronic components for operating the hydrophones. In order to avoid air pockets in the acoustic part of the gel body is poured with enclosed hydrophones and building blocks outside of the tube, wherein the diameter of the gel body is smaller than the diameter of the tube. The elastic gel bodies are introduced into the tube together with oil. The gel bodies absorb oil swelling and fill the tube after the swelling process without blistering. The casting of a gel body takes place in a tubular mold with an inlet nozzle and a riser. Gel is poured into the tube via the inlet nozzle. After setting, a gel layer is formed in the mold on which the hydrophones and electronic components are placed. In the further manufacturing process, liquid gel is filled until the mold is filled with gel, escaping over the riser in the mold existing air, so that after setting the gel body has no air bubbles.

Eine ebenfalls bekannte Untetwasser-Schleppantenne ( DE 195 18 461 C1 ) weist eine elastische, schlauchförmige Hülle und eine Vielzahl von darin mittig und im festen Längsabstand voneinander angeordneten Hydrophonen auf. Zur Erzielung eines kleinen Durchmessers der Schleppantenne ist die schlauchförmige Hülle aus Polyäthylen mit einer spezifischen Dichte von > 1 gr/cm3 gefertigt und vollständig mit einem die Hydrophone unmittelbar einschließenden, weichen Gel ausgefüllt.A likewise known submerged towed antenna ( DE 195 18 461 C1 ) has an elastic, tubular casing and a plurality of hydrophones arranged centrally and at a fixed longitudinal distance from each other. To achieve a small diameter of the towed antenna, the tubular envelope is made of polyethylene with a specific gravity of> 1 gr / cm 3 and completely filled with a hydrophone immediately enclosing, soft gel.

Ein bekanntes Wandlerelement, insbesondere Hydrophon, für eine Unterwasserantenne ( DE 37 39 185 A1 ) weist ein Piezoelement mit einer seine parallel zur Polarisationsrichtung sich erstreckenden Seitenflächen überdeckenden Ummantelung auf. Die Ummantelung besteht aus einem syntaktischen Schaum oder einem elastischen oder viskoelastischen Kunststoff mit gasgefüllten Mikroblasen, wobei die Mikroblasen vorzugsweise an den Außenflächen konzentriert sind. Die Wandlerelemente sind mit einer Umhüllung aus schalltransparentem Umgussmaterial, z.B. Polyurethan, versehen.A known transducer element, in particular hydrophone, for an underwater antenna ( DE 37 39 185 A1 ) has a piezoelectric element with a jacket which covers its side surfaces extending parallel to the polarization direction. The sheath consists of a syntactic foam or an elastic or viscoelastic plastic with gas-filled micro-bubbles, wherein the micro-bubbles are preferably concentrated on the outer surfaces. The transducer elements are provided with a cladding of sound-transparent encapsulation material, eg polyurethane.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Unterwasserantenne der vorstehend beschriebenen Art die Kräfte, die bei Auftreffen von durch Explosionen im Wasser ausgelösten Druckwellen auf das Gehäuse der Unterwasserantenne an den Bauteilen angreifen, zu reduzieren.The invention has for its object to reduce in an underwater antenna of the type described above, the forces acting on impact on the components of the housing of the underwater antenna upon impact of triggered by explosions in the water pressure waves.

Die Aufgabe ist erfindungsgemäß durch die Merkmale im Anspruch 1 gelöst.The object is achieved by the features in claim 1.

Die erfindungsgemäße Unterwasserantenne hat den Vorteil, daß durch die Ausfüllung des Aufnahmeraums mit an Wasser impedanzangepaßtem Füllstoff die auf die Unterwasserantenne auftreffende Druckwelle nicht an der Grenzschicht zum hohlen Aufnahmeraum reflektiert wird, sondern das gesamte Gehäuse der Unterwasserantenne ohne wesentliche Reflexionen durchläuft. Da keine Reflexionswelle entsteht, die sich der einlaufenden Druckwelle überlagert, werden die Bauteile durch die Druckwelle weit weniger stark beschleunigt als bei einem nur luftgefüllten Aufnahmeraum, und zwar um etwa die Hälfte. Zudem übt die Füllung einerseits eine mechanische Stützfunktion für die Bauteile aus und verhindert andererseits durch das vollständige Umschließen der Bauteile, daß diese in Resonanz geraten und es zu einer weiteren Erhöhung der an den Bauteilen angreifenden oszillierenden Kraft, der sog. Resonanzüberhöhung, kommt, die nochmals eine Verdopplung des Beschleunigungswerts hervorrufen würde. Insgesamt treten damit durch die Füllung des Aufnahmeraums an den Bauteilen geringere Kräfte auf, was geringere Anforderungen an die Schockfestigkeit der Bauteile und geringere Anforderungen an die Lagerkräfte für die Befestigungen der Bauteile stellt. Beides läßt die Fertigungskosten der Unterwasserantenne sinken.The underwater antenna according to the invention has the advantage that by filling the receiving space with impedance-matched to water filler impinging on the underwater antenna pressure wave is not reflected at the boundary layer to the hollow receiving space, but passes through the entire housing of the underwater antenna without significant reflections. Since no reflection wave is formed, which is superimposed on the incoming pressure wave, the components are accelerated by the pressure wave much less than in an air-filled receiving space, by about half. In addition, the filling on the one hand exerts a mechanical support function for the components and on the other hand prevented by the complete enclosure of the components, that they get into resonance and there is a further increase in the forces acting on the components oscillating force, the so-called. Resonance peaking, comes again would cause a doubling of the acceleration value. Overall, thus occur by the filling of the receiving space to the components lower forces, which lower requirements for the shock resistance of the components and lower demands on the bearing forces for the Fasteners of the components provides. Both reduce the cost of manufacturing the underwater antenna.

Zweckmäßige Ausführungsformen der erfindungsgemäßen Unterwasserantenne mit vorteilhaften Weiterbildungen und Ausgestaltungen der Erfindung ergeben sich aus den weiteren Ansprüchen.Advantageous embodiments of the invention underwater antenna with advantageous developments and refinements of the invention will become apparent from the other claims.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der Füllstoff eine Flüssigkeit oder ein Gel. Eine Flüssigkeitsfüllung erleichtert den Austausch oder die Reparatur von Bauteilen. Dies gilt auch für Füllungen mit einem Gel, wenn das Gel die Eigenschaft besitzt, bei Erwärmung fließfähig zu werden.According to an advantageous embodiment of the invention, the filler is a liquid or a gel. A liquid filling facilitates the replacement or repair of components. This also applies to fillings with a gel, if the gel has the property to become fluid when heated.

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels im folgenden näher beschrieben, Es zeigen:

Fig. 1
einen Längsschnitt einer Unterwasserantenne, nur schematisch dargestellt,
Fig. 2
eine perspektivische Ansicht einer konstruktiven Ausführung der Unterwasserantenne mit teilweise aufgeschnittenem Gehäuse,
Fig. 3 und 4
jeweils ein beispielhaftes Diagramm der bei Schockbelastung der Unterwasserantenne im Knoten A in Fig. 1 auftretenden Beschleunigung in Abhängigkeit von der Zeit bei ungefülltem (Fig. 3) und gefülltem (Fig. 4) Aufnahmeraum.
The invention is described in more detail below with reference to an embodiment shown in the drawing, in which:
Fig. 1
a longitudinal section of an underwater antenna, shown only schematically,
Fig. 2
a perspective view of a structural design of the underwater antenna with partially cut housing,
3 and 4
each an exemplary diagram of the shock load of the underwater antenna in the node A in Fig. 1 occurring acceleration as a function of time when unfilled ( Fig. 3 ) and filled ( Fig. 4 ) Recording room.

Die in Fig. 1 im Längsschnitt und nur schematisch und in Fig. 2 als ein konstruktives Ausführungsbeispiel dargestellte Unterwasserantenne dient vorzugsweise zur Minendetektion und ist ein wesentlicher Sensor einer Minenmeideanlage. Die Antenne weist ein mit einem Deckel 11 verschlossenes steifes Gehäuse 10 auf, das am freien Ende eines Trägers 12 befestigt ist. Der Träger 12 ist im Rumpf eines Wasserfahrzeugs, insbesondere eines U-Boots, axial verschiebbar gehalten, so daß die Antenne durch eine Öffnung im Rumpfboden ein- und ausgefahren werden kann. Ggf. ist der Träger 12 auch um seine Längsachse drehbar ausgebildet.In the Fig. 1 in longitudinal section and only schematically and in Fig. 2 The underwater antenna shown as a constructional embodiment is preferably used for mine detection and is an essential sensor of a mine avoidance system. The antenna has a closed housing 10 with a closed rigid housing 10 which is fixed to the free end of a carrier 12. The carrier 12 is held axially displaceable in the hull of a watercraft, in particular a submarine, so that the antenna can be retracted and extended through an opening in the fuselage bottom. Possibly. the carrier 12 is also designed to be rotatable about its longitudinal axis.

Wie in der schematischen Schnittdarstellung der Fig. 1 angedeutet ist, weist die Unterwasserantenne eine ein sog. Flächenarray bildende Wandleranordnung 13 aus einer Vielzahl von einzelnen, voneinander horizontal und vertikal beabstandet angeordneten Wandlern 131 auf, die in einen Umguß 14 aus Kunststoff, z.B. Polyurethan, eingebettet sind. Die Wandleranordnung 13 ist im vorderen Bereich des Gehäuses 10 aufgenommen und an einer im Gehäuse 10 sich quer erstreckenden Montageplatte 15 befestigt. Auf der von der Wandleranordnung 13 abgekehrten Rückseite der Montageplatte 15 ist im Gehäuse 10 ein Aufnahmeraum 16 für weitere Bauteile 17 der Antenne vorgesehen. Diese Bauteile 17 sind beispielsweise Vorverstärker, Übertragertransformatoren, Drosseln oder andere Elektronikkomponenten. Diese Bauteile 17 sind über geeignete Befestigungsstifte 18 an der Montageplatte 15 befestigt. Die in Fig. 1 nur schematisch dargestellten Bauteile 17 sind in einer konstruktiven Ausführung in Fig. 2 zu sehen. Sie weisen jeweils eine doppellagige Leiterplatte 19 auf, auf welcher die Elektronikkomponenten befestigt und miteinander elektrisch verbunden sind. Jede Leiterplatte 19 ist über die bereits erwähnten Befestigungsstifte 18 an der Montageplatte 15 festgelegt. An der Montageplatte 15 befestigte Steckverbinder 20 stellen die elektrische Verbindung zwischen den Elektronikkomponenten und den Wandlern 131 der Wandleranordnung 13 her.As in the schematic sectional view of Fig. 1 is indicated, the underwater antenna has a so-called. Surface array forming transducer assembly 13 from a plurality of individual, horizontally and vertically spaced from each other arranged transducers 131, which are embedded in an encapsulation 14 made of plastic, eg polyurethane. The transducer assembly 13 is received in the front region of the housing 10 and secured to a housing 10 in the transversely extending mounting plate 15. On the back of the mounting plate 15 facing away from the transducer assembly 13, a receiving space 16 for further components 17 of the antenna is provided in the housing 10. These components 17 are, for example, preamplifiers, transformer transformers, chokes or other electronic components. These components 17 are fastened to the mounting plate 15 via suitable fastening pins 18. In the Fig. 1 only schematically illustrated components 17 are in a structural design in Fig. 2 to see. They each have a double-layer printed circuit board 19 on which the electronic components are mounted and electrically connected to each other. Each circuit board 19 is already over mentioned fastening pins 18 fixed to the mounting plate 15. Attached to the mounting plate 15 connectors 20 establish the electrical connection between the electronic components and the transducers 131 of the transducer assembly 13 ago.

Nach Einsetzen der Bauteile 17 wird der gesamte Aufnahmeraum 16 mit einem Füllstoff 21 ausgefüllt, dessen akustische Impedanz an der des Wasser angenähert ist. Trifft eine Druckwelle, die beispielsweise von der Explosion einer Mine ausgelöst wird, mit einer Druckamplitude p0 auf die Wandleranordnung 13 auf, so bleibt die Druckamplitude p0 beim Durchgang durch den Umguß 14, der eine zum Wasser vergleichbare akustische Impedanz aufweist, angenähert erhalten und trifft auf die Grenzfläche zwischen Umguß 14 und Füllstoff 21. Diese Druckwelle erzeugt an der Montageplatte 15 eine Oszillation, wobei die Montageplatte 15 eine gemittelte Beschleunigung erfährt von a 0 = p 0 ρ ⋅ c ⋅ θ ,

Figure imgb0001
wobei ρ die Massendichte, c die Schallgeschwindigkeit und θ die 1/e-Breite ist. Die 1/e-Breite ist diejenige Zeitspanne, in welcher die auf die Druckamplitude p0 normierte Druckamplitude p(t) der Druckwelle auf den Wert 1/e abgeklungen ist. Bei z.B. einer Druckwelle von 200bar, einer 1/e-Breite von θ=1•10-3sec und einer Schallgeschwindigkeit c=1500m/sec ergibt sich eine mittlere Beschleunigung a0=1,3•104m/sec2. Besitzen die Bauteile 17 die Masse m, so müssen die Lagerungskräfte, mit denen die Bauteile 17 an der Montageplatte 15 gehalten werden, größer als F = 2ma0 sein. Wäre der impedanzangepaßte Füllstoff 21 im Aufnahmeraum 16 nicht vorhanden, sondern dieser nur luftgefüllt, so würde die Druckwelle an der Grenzfläche zwischen Umguß 14 und Aufnahmeraum 16 reflektiert und die Reflexionswelle sich der Druckwelle überlagern. Die auf die Montageplatte 15 wirkende Druckamplitude würde sich verdoppeln, so daß doppelt so hohe Lagerkräfte erforderlich wären, um ein Ablösen der Bauteile 17 von der Montageplatte 15 zu verhindern.After insertion of the components 17, the entire receiving space 16 is filled with a filler 21 whose acoustic impedance is approximated to that of the water. If a pressure wave, which is triggered, for example, by the explosion of a mine, with a pressure amplitude p 0 on the transducer assembly 13, the pressure amplitude p 0 remains when passing through the encapsulation 14, which has an acoustic impedance comparable to the water, approximately obtained and meets the interface between encapsulation 14 and filler 21. This pressure wave generated on the mounting plate 15 an oscillation, wherein the mounting plate 15 undergoes an average acceleration of a 0 = p 0 ρ ⋅ c ⋅ θ .
Figure imgb0001
 where ρ is the mass density, c the speed of sound and θ the 1 / e-width. The 1 / e width is the time span in which the pressure amplitude p (t) of the pressure wave normalized to the pressure amplitude p 0 has decayed to the value 1 / e. For example, with a pressure wave of 200 bar, a 1 / e width of θ = 1 × 10 -3 sec and a speed of sound c = 1500 m / sec, an average acceleration a 0 = 1.3 × 10 4 m / sec 2 results. If the components 17 have the mass m, then the bearing forces with which the components 17 are held on the mounting plate 15 must be greater than F = 2ma 0 . If the impedance matched filler 21 in the receiving space 16 is not present, but this only air-filled, so would the Pressure wave at the interface between the encapsulation 14 and receiving space 16 is reflected and superimpose the reflection wave of the pressure wave. The pressure amplitude acting on the mounting plate 15 would double, so that twice as high bearing forces would be required to prevent detachment of the components 17 from the mounting plate 15.

In den beiden Diagrammen der Fig. 3 und 4 sind die vorstehend beschriebenen Beschleunigungsverhältnisse bei luftgefülltem Aufnahmeraum 16 (Fig. 3) und bei mit impedanzangepaßtem Füllstoff 21 gefülltem Aufnahmeraum 16 illustriert. Dabei ist die Beschleunigung des Knotens A auf der Montageplatte 15 in Fig. 1 in Abhängigkeit von der Zeit dargestellt, wobei im Zeitpunkt t=0 die Druckwelle mit einer Druckamplitude von z.B. 190bar auf die Wandleranordnung 13 auftrifft. Deutlich ist zu sehen, daß die Beschleunigung des Knotens A durch den Füllstoff 21 erheblich reduziert wird. Eine solche Reduzierung wird noch größer, wenn man berücksichtigt, daß bei luftgefülltem Aufnahmeraum 16 an der Montageplatte 15 eine Resonanzüberhöhung auftreten kann, wenn 1/θ der Resonanzfrequenz der Lagerung der Bauteile 17 entspricht.In the two diagrams of Fig. 3 and 4 are the acceleration ratios described above for air-filled receiving space 16 (FIG. Fig. 3 ) and in filled with impedance matched filler 21 receiving space 16 illustrated. In this case, the acceleration of the node A on the mounting plate 15 in Fig. 1 represented as a function of time, wherein at the time t = 0, the pressure wave impinges on the transducer assembly 13 with a pressure amplitude of eg 190bar. It can clearly be seen that the acceleration of the knot A by the filler 21 is considerably reduced. Such a reduction is even greater, considering that when the air-filled receiving space 16 on the mounting plate 15, a resonance increase can occur when 1 / θ the resonant frequency of the storage of the components 17 corresponds.

Als Füllstoff 21 wird vorzugsweise eine Flüssigkeit, z.B. Öl oder ein Gel verwendet, daß durch Erwärmen fließfähig wird. Bei einem solchen Füllstoff 21 kann der Aufnahmeraum 16 zwecks Reparatur oder Austausch der Bauteile 17 entleert werden. Als Füllstoff 21 kann aber auch ein flüssiges Vergußmaterial, z.B. Polyurethan, verwendet werden, das aushärtet.As the filler 21 is preferably a liquid, e.g. Oil or gel used that is flowable by heating. With such a filler 21, the receiving space 16 can be emptied for the purpose of repair or replacement of the components 17. However, a liquid potting material, e.g. Polyurethane, which hardens.

Claims (10)

  1. Underwater antenna having a stiff housing (10), which is attached to a support (12), having a transducer arrangement (13) which is integrated in the housing (10) and consists of a multiplicity of electroacoustic transducers (131), having components (17), which are held in a holding area (16) which is formed in the housing (10), for operation of the transducers (131), and having a holder (15), which is fixed in the housing (10) and to which the components (17) are attached, characterized in that the holder is a mounting plate (15), which supports the transducer arrangement (13) and on whose rear face, facing away from the transducer arrangement (13), the holding area (16) is located, and in that the holding area (16) is filled completely with a filler (21) whose acoustic impedance is approximately the same as that of the water.
  2. Underwater antenna according to Claim 1, characterized in that the filler (21) is a gel.
  3. Underwater antenna according to Claim 1, characterized in that the filler (21) is a liquid.
  4. Underwater antenna according to Claim 3, characterized in that the liquid is oil.
  5. Underwater antenna according to Claim 1, characterized in that the filler (21) is a cured encapsulation material.
  6. Underwater antenna according to Claim 5, characterized in that the encapsulation material consists of polyurethane.
  7. Underwater antenna according to one of Claims 1-6, characterized in that the components (17) are electronic components.
  8. Underwater antenna according to Claim 7, characterized in that the electronic components are arranged on printed circuit boards (19) which are attached to the mounting plate (15).
  9. Underwater antenna according to one of Claims 1-8, characterized in that the electroacoustic transducers (131) are embedded in surrounding encapsulation (14) whose acoustic impedance is matched to that of the water, and in that the mounting plate (15) rests on the surrounding encapsulation (14).
  10. Underwater antenna according to one of Claims 1-9, characterized in that the support (12) is designed such that it can pivot about its longitudinal axis, and can be pushed out of the hull, and pulled into the hull, of a watercraft, in particular of an underwater vehicle.
EP02001535A 2001-04-24 2002-01-23 Underwater antenna Expired - Lifetime EP1253666B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10119867 2001-04-24
DE10119867A DE10119867B4 (en) 2001-04-24 2001-04-24 Underwater antenna

Publications (3)

Publication Number Publication Date
EP1253666A2 EP1253666A2 (en) 2002-10-30
EP1253666A3 EP1253666A3 (en) 2008-06-18
EP1253666B1 true EP1253666B1 (en) 2012-03-07

Family

ID=7682413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02001535A Expired - Lifetime EP1253666B1 (en) 2001-04-24 2002-01-23 Underwater antenna

Country Status (4)

Country Link
EP (1) EP1253666B1 (en)
AT (1) ATE548780T1 (en)
AU (1) AU783946B2 (en)
DE (1) DE10119867B4 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9044227B2 (en) 2010-09-30 2015-06-02 Ethicon Endo-Surgery, Inc. Collapsible fastener cartridge

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004038032A1 (en) * 2004-08-05 2006-02-23 Atlas Elektronik Gmbh Electroacoustic transducer assembly for underwater antennas
DE102005053644B3 (en) * 2005-11-10 2007-05-31 Atlas Elektronik Gmbh antenna module
DE102006051921B3 (en) 2006-11-03 2008-02-21 Atlas Elektronik Gmbh Acoustic underwater antenna for e.g. surface ship, has electronic module designed as molded part that is supported at shell, where module is axially and immovably fixed at cables, which are diametrically arranged parallel to module axis

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332754A1 (en) * 1983-09-10 1985-03-28 Fried. Krupp Gmbh, 4300 Essen UNDERWATER SHIP
DE3642747A1 (en) * 1986-12-15 1988-06-16 Krupp Atlas Elektronik Gmbh HULL BODY FOR A HYDROPHONE ARRANGEMENT
DE3739185A1 (en) * 1987-11-19 1989-06-01 Krupp Atlas Elektronik Gmbh CONVERTER ELEMENT
US4907208A (en) * 1988-12-02 1990-03-06 Lowrance Electronics, Inc. Sonar transducer assembly for fishing boats
CA2067242A1 (en) * 1989-10-17 1991-04-18 Dennis Feragen Soft sonar suspension system
DE19518461C1 (en) * 1995-05-19 1996-06-13 Stn Atlas Elektronik Gmbh Underwater towing antenna
DE19811335C1 (en) * 1998-03-16 1999-11-11 Stn Atlas Elektronik Gmbh Towing antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9044227B2 (en) 2010-09-30 2015-06-02 Ethicon Endo-Surgery, Inc. Collapsible fastener cartridge

Also Published As

Publication number Publication date
DE10119867A1 (en) 2002-10-31
AU3558102A (en) 2002-12-12
EP1253666A3 (en) 2008-06-18
ATE548780T1 (en) 2012-03-15
DE10119867B4 (en) 2005-10-13
AU783946B2 (en) 2006-01-05
EP1253666A2 (en) 2002-10-30

Similar Documents

Publication Publication Date Title
DE3490708C2 (en) Device for maritime exploration of stratified subsoil under water using shear waves
DE60005382T2 (en) BROADBAND UNDERWATER SOUND CONVERTER
DE2914031B1 (en) Ultrasonic transducer
DE3025233A1 (en) TRANSMISSION DEVICE FOR ULTRASOUND IMPULSES IN AIR
WO2006015645A1 (en) Electroacoustic underwater antenna
EP0654953A1 (en) Electroacoustic transducer arrangement
DE3443869C2 (en)
DE10045847B4 (en) cavitation
EP1253666B1 (en) Underwater antenna
DE2606951A1 (en) PIEZOELECTRIC CONVERTER
DE3908572A1 (en) METHOD AND DEVICE FOR REDUCING THE SOUND EMISSION OF SUBMERSIBLES SUBMERSIBLE
EP1191351B1 (en) Underwater towed array
DE102008052355A1 (en) Underwater antenna
DE2203221A1 (en) Particle detector
DE3150456C2 (en)
EP3423861B1 (en) System for a sonar device and underwater vehicle and method using same
DE19717903A1 (en) Hydrophone and process for its manufacture
EP1774509B1 (en) Electroacoustic transducer arrangement for underwater antennas
DE2744823B2 (en) Transmitter / receiver arrangement for sound or ultrasonic waves for distance measurement according to the echo sounder principle
DE3401979C2 (en)
EP1033588B1 (en) Towed array
DE2100473C3 (en) Electroacoustic converter
DE3440747C2 (en)
EP0943932B1 (en) Towed array with shaping pieces from anorganic foam
DE2637414B2 (en) Amplitude measuring device for the servo control of a loudspeaker

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ATLAS ELEKTRONIK GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20081114

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17Q First examination report despatched

Effective date: 20090128

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 548780

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120315

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 50215401

Country of ref document: DE

Effective date: 20120503

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20120307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120307

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120709

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120307

26N No opposition filed

Effective date: 20121210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120307

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 50215401

Country of ref document: DE

Effective date: 20121210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120618

BERE Be: lapsed

Owner name: ATLAS ELEKTRONIK G.M.B.H.

Effective date: 20130131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50215401

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130131

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130123

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 548780

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130123

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20210121

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20210120

Year of fee payment: 20

Ref country code: GB

Payment date: 20210121

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50215401

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20220122

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20220122