WO2016162008A1 - Système transducteur, dispositif transducteur et sonar et véhicule aquatique - Google Patents

Système transducteur, dispositif transducteur et sonar et véhicule aquatique Download PDF

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Publication number
WO2016162008A1
WO2016162008A1 PCT/DE2016/100095 DE2016100095W WO2016162008A1 WO 2016162008 A1 WO2016162008 A1 WO 2016162008A1 DE 2016100095 W DE2016100095 W DE 2016100095W WO 2016162008 A1 WO2016162008 A1 WO 2016162008A1
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
carrier
acoustic
sound pressure
transducer carrier
Prior art date
Application number
PCT/DE2016/100095
Other languages
German (de)
English (en)
Inventor
Christoph Hoffmann
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
Priority to EP16715790.8A priority Critical patent/EP3280545A1/fr
Publication of WO2016162008A1 publication Critical patent/WO2016162008A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
    • B06B1/0633—Cylindrical array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
    • 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
    • G10K11/008—Arrays of transducers

Definitions

  • Converter device converts to converter
  • the invention relates to a transducer device for transmitting and / or receiving acoustic
  • Underwater signals which has a transducer carrier and an acoustic absorber, wherein on the transducer carrier an acoustic transducer element is arranged and in a sound pressure direction behind each other first the transducer carrier and behind the acoustic absorber are arranged. Furthermore, the invention relates to a converter device, a sonar and a watercraft.
  • converters for transmitting and / or receiving acoustic underwater signals are stiff, in particular bending and / or torsionally rigid, designed.
  • a connected steel plate is arranged in the direction of the sound pressure and / or the transducer element is permanently installed.
  • the acoustic absorber material is usually strongly (over) sensitive to pressure, since it is precisely the task of the absorber to "swallow" the sound, since the absorber material has little or no back reflection occurs, it is destroyed under heavy pressure, such as a shockwave due to an obvious explosion.
  • the transducer device Since the acoustic absorber is arranged behind the transducer device, the transducer device first has to be disassembled and then the acoustic absorber has to be exchanged.
  • the object of the invention is to improve the state of the art.
  • a transducer device for transmitting and / or receiving acoustic underwater signals, which a transducer carrier and a having acoustic absorber, wherein on the transducer carrier an acoustic transducer element is arranged and in a sound pressure direction behind each other first the transducer carrier and behind the acoustic absorber are arranged, wherein the transducer carrier is designed elastically, so that the elastic transducer carrier is mechanically oscillatable and substantially decoupled from the acoustic absorber is such that the acoustic absorber remains intact when a shock-pressure wave impinges on the transducer device.
  • a Bugsonar can be provided, which allows a "view" in front of the ship and also remains operational in, for example, a nearby mine explosion.
  • Underwater vehicle by means of the converter device is no longer possible. Furthermore, it prevents the navigation of the underwater vehicle and the detection of dangers for the underwater vehicle are impaired. In addition, the material, maintenance and installation costs are lower due to the longer service life of the acoustic absorber over the prior art.
  • an essential idea of the invention is based on the fact that contrary to the prior art, the acoustic transducer element is not designed stiff, but that the acoustic transducer element is disposed on an elastic transducer carrier, which is mechanically oscillatable. Due to the mechanical vibration capability of the transducer carrier and the decoupling to the underlying acoustic absorber prevents the acoustic absorber is destroyed when hitting a shock pressure wave.
  • Shock sound pressure wave realized by that part of the shock sound pressure is converted into a mechanical vibration of the transducer carrier or other mechanical components.
  • a "transducer device” is in particular a device for transmitting and / or receiving submarine acoustic signals, as used in the use of active and passive sonars.
  • the transducer device receives underwater sound signals and converts these into an electrical signal for further processing and / or converts an electrical signal into an acoustic signal, which is sent out.
  • An "acoustic transducer element” is, in particular, a sound transducer or a hydrophone which converts acoustic signals into electrical voltages as sound pressure reversals or conversely converts electrical signals into acoustic signals, for example, underwater hydrophones are used to record waterborne noise
  • piezoelectric transducers are used today as an acoustic transducer element
  • the piezoelectric element generates an electrical voltage when a mechanical pressure is applied or performs a mechanical movement when an electrical voltage is applied
  • Piezoelectric ceramics are often piezoelectric ceramics, but also plastic piezoelectric elements are known, in particular polyvinylidene fluoride (PVDF) is used in hydrophones.
  • the piezoelectric ceramic Upon impact of the sound pressure, the piezoelectric ceramic is elastically deformed, whereby a change in the electrical polarization and thus an occurrence of an electrical voltage on the ceramic solid takes place. Conversely, the ceramic piezoelectric element deforms upon application of an electrical voltage and gives off a mechanical pressure.
  • a "transducer carrier” is in particular connected to the acoustic transducer element and at least partially wears and / or surrounds the acoustic transducer
  • the transducer carrier is in Sound pressure direction behind and / or arranged next to the acoustic transducer element.
  • the transducer carrier is designed in particular elastically.
  • Solid pressure refers to the pressure fluctuations of a compressible sound-transmitting medium (such as air or water) that occur when sound propagates, in particular the alternating pressure superimposed on the static pressure of the surrounding medium.
  • a compressible sound-transmitting medium such as air or water
  • sound pressure direction refers to the direction from which the sound pressure of the highest intensity impinges on the transducer device.
  • shock-sound pressure wave is in particular a sound pressure wave that occurs very suddenly (erratic) and / or with a very high amplitude
  • Shock sound pressure wave is present in particular when the sound pressure is greater than the ambient pressure.
  • a shock wave pressure wave may also be present when a low intensity sound pressure wave occurs in close proximity to a transducer device. For example, such Shock sound pressure wave caused by an underwater mine explosion at a distance of 100m from the transducer carrier.
  • An "acoustic absorber” reduces the sound energy, in particular by converting it into thermal energy, but other forms of absorption of the sound energy can occur in addition to the conversion into heat, and if the incident sound is completely absorbed, no reflection takes place it can be porous sound-absorbing substances which convert the kinetic component of the sound energy into heat energy by friction in the pores and thus reduce the sound energy, for example, the use of mineral fibers in absorbers, in particular an absorber for the absorption of ultrasound Polyurethane base used.
  • decoupling means that no or only very little interaction between the transducer carrier and the acoustic absorber caused by the sound pressure occurs.Also decoupling can be carried out spatially and / or by storage and / or connection in such a way that the vibrations of the transducer carrier are not transmitted or only to a small extent on the acoustic absorber.
  • Converter means are arranged on the transducer carrier a plurality of acoustic transducer elements. By arranging a plurality of acoustic transducer elements on the transducer carrier, the transducer means can be designed to save space. Furthermore, material is saved in which not every single transducer element is supported by a single transducer carrier.
  • a higher spatial resolution can be achieved by the use of a plurality of transducer elements and thus the navigation can be improved.
  • the transducer carrier has a transducer carrier bearing or a plurality of transducer carrier bearings, so that the transducer carrier is supported by this or these mechanically oscillatable.
  • a "transducer carrier” is understood to mean, in particular, a component that picks up and, where appropriate, transmits the load of the transducer carrier, which may be a solid and therefore non-displaceable bearing or a movable bearing in the converter support in a simple manner to act on a support which receives as a vertical component, the load mainly in the direction of its longitudinal axis and forwards.
  • the transducer carrier can also be designed so that it is connected to both the transducer carrier and with the acoustic absorber.
  • the elastic transducer carrier can The effect of pressure, in particular shock pressure, not only bending but also swinging.
  • the shock pressure is damped or converted into mechanical vibration by the swing and only partially forwarded from the transducer carrier bearing.
  • the sound intensity applied to the acoustic absorber is reduced.
  • the transducer device can be designed such that one of the transducer carrier bearings is substantially in the center or at a position up to the outer edge is arranged of the transducer carrier bearing.
  • the vibration can be selectively enabled, for example, at the outer edges or in the middle of the transducer carrier.
  • the highest vibration amplitude can be provided where most space exists for the vibration deflection.
  • two transducer carrier bearings are substantially centered or respectively at the opposite outer edges of the carrier
  • the load bearing in the middle is reinforced and the transducer carrier is more mechanically vibratable at the two opposite outer edges.
  • the transducer carrier bearings may be spaced apart by a guide gap.
  • a "guide gap” is understood in particular to mean a space between two transducer carrier bearings which is not filled with transducer carrier material and through which, for example, cables can be guided freely.
  • the transducer carrier is mechanically connected via the transducer carrier bearing or the transducer carrier bearing to a vibration carrier, so that, in particular, the transducer device is designed to be at least twice mechanically oscillatable.
  • a "vibrating carrier” is in particular a carrier that absorbs mechanical vibrations, can itself vibrate mechanically and thereby further reduces the intensity of the shock-sound pressure.
  • the transducer carrier is not only elastic but already self-oscillating, in particular if the transducer carrier can also oscillate transversely to the sound pressure direction. This is particularly advantageous because the sound pressure is not only in the sound pressure direction but also across the
  • both the transducer carrier and the transducer carrier bearing and the vibrating carrier are elastically oscillatable, so that a at least double or even triple swinging system exists.
  • the transducer means can be designed so that in the sound pressure direction of the vibrating carrier is mounted vibrationally in front of the acoustic absorber and / or mounted on a vibratable plate.
  • non-compressing is understood in particular to mean a volume change of less than 3%, particularly preferably less than 1.5% or less than 1%, of a normal volume of the acoustic absorber.
  • the vibration carrier can be mounted on a swinging plate.
  • the vibrating support is mounted on the plate so that it is mounted between slots in the plate and subsequently an air cushion is arranged, a good sound-damping effect is achieved by the spring mass principle.
  • the converter device is designed such that the
  • Transducer further converter carrier and / or further transducer carrier bearing and / or further vibrating carrier has. [55] As a result, the ability to vibrate the
  • Transducer device to be adapted to the pressure sensitivity of the acoustic absorber.
  • the transducer device can be designed so that it can be used optimally for transmitting and / or receiving submarine acoustic signals.
  • a first filling compound and / or a further acoustic absorber can be provided in the direction of the sound pressure downstream of the transducer carrier, which are arranged at least partially between the transducer carrier and the oscillating carrier.
  • a “filling compound” is understood to mean, in particular, a mass for filling the space downstream of the transducer carrier, which may be a plastics material and / or cork and / or another filling material. What exactly characterizes "soft”?] Polyurethane and polyoxymethylene be used.
  • a filling compound is advantageous because it can on the one hand bond the components, which provides stability.
  • the filling compound can be elastic and thus dampening.
  • the filling mass prevents seawater from penetrating into the transducer device and in particular causing corrosive damage.
  • the filling compound can "glue" the transducer carrier to the acoustic absorber.
  • the filling compound is softer or correspondingly more compressible than the material of the absorber.
  • the arrangement of a further acoustic absorber between the transducer carrier and the oscillating carrier has the advantage that in this case additional sound is swallowed by the further acoustic absorber. This is particularly advantageous if the sound pressure impinges transversely to the direction of sound pressure on the transducer carrier and the transducer carrier is also oscillatable in the transverse direction.
  • the transducer carrier and / or the transducer carrier bearing and / or the vibrating carrier may comprise a fiber composite material.
  • a “fiber composite” is a multiphase and / or mixed material consisting of usually two main components, one component being a matrix and the other reinforcing fibers.
  • a “fiber” is a thin and flexible structure made of a pulp relative to its length
  • the length to diameter ratio is at least 3 to 1 or preferably at least 10 to 1.
  • fibers have one Length to diameter ratio of 1000 to 1. Due to the length to diameter ratio, the fibers give the material the necessary (reversible) flexibility.
  • Fiber composite fiberglass reinforced plastic to use.
  • thermosetting plastic such as polyester resin or epoxy resin and / or thermoplastics such as polyamide are used together.
  • glass fiber reinforced plastic has a relatively low elastic deformability compared to other fiber composites.
  • the transducer carrier behind the acoustic transducer element has a material thickness of 1/4 to 1/12 of a total material thickness of the transducer carrier.
  • a thinner material thickness of the transducer carrier behind the acoustic transducer element in the sound pressure direction is advantageous in comparison to the total material thickness of the transducer carrier, because thereby the transducer carrier in the middle behind the acoustic transducer element is better elastically deformable. This allows the edges to vibrate better with a higher material thickness or act as a (train) bearing. As a result, the transducer carrier can vibrate better transversely, in particular orthogonally, mechanically to the sound pressure direction.
  • the transducer carrier can have an absorber layer or several absorber layers in addition to the acoustic transducer element parallel to the sound pressure direction.
  • the additional absorber layers in the transducer carrier next to the acoustic transducer element also attenuate the sound pressure transversely, in particular orthogonally, to the sound pressure direction.
  • the absorber layers relieve the absorber arranged behind the transducer carrier.
  • another filling compound is arranged around a transducer element and / or between two transducer elements.
  • the further filling compound is similar in properties to the above-defined first filling compound, except that it relates here to one transducer element or several transducer elements.
  • the filler has the task of elastically bonding an transducer element to the transducer carrier and / or of connecting pressure plates and / or impedance blocks and / or further layers, in particular elastic layers, in the direction of the sound pressure in front of and behind the transducer element , In addition, this has the task of preventing seawater from reaching the transducer element. It can also be used for bonding conductive layers in front of and behind the transducer element in the sound pressure direction.
  • the arrangement of the further filling compound is advantageous in order to elastically damp the vibrations of the transducer elements and bond them together.
  • one or more transducer elements on the side of the impinging sound pressure are coated with a conductive layer, in particular a conductive grid of copper.
  • a conductive layer is necessary in particular for supplying or removing the voltage in a piezoelectric element.
  • the conductive layer is vapor-deposited directly on the piezoelectric element.
  • the object is achieved by a converter device with two converter devices or more converter devices as described above, wherein the converter devices are arranged parallel and / or in series.
  • a conversion device can be made according to the needs of the user.
  • a transducer means for transmitting and another transducer means for receiving underwater signals may be used.
  • Oscillating the transducer device can be optimized by, for example, a plurality of transducer devices are arranged on a slotted plate.
  • the object is achieved by a sonar, in particular Bugsonar, wherein the sonar comprises a transducer device or a plurality of transducer devices as previously described or a transducer device or a plurality of transducer devices as previously described.
  • Nonar is understood to mean a system for locating objects in space and under water by means of emitted sound pulses, which may be an active sonar which itself emits a signal, or a passive sonar, which receives only emitted sound pulses. It can also be a bi- or multistatic sonar, which can simultaneously send and receive on different platforms.
  • This transducer device and / or device is particularly advantageous for a Bugsonar, since a shock-sound pressure wave usually hits directly on a Bugsonar on the hull. With a Bugsonar it is particularly important that the absorber remains intact.
  • the object is achieved by a watercraft, in particular a submarine, which has a sonar as described above.
  • the acoustic absorber of the converter devices and sonars are not destroyed by sound pressure waves, otherwise disturbed navigation and location by the submarine and the submarine is endangered.
  • Figure 1 is a highly schematic
  • a hydrophone 101 has a piezoelectric ceramic 105 disposed on a GRP carrier 103.
  • an aluminum plate 107, a GRP plate 108 and a front copper layer 109 follows first of the piezoelectric ceramic 105.
  • This copper layer 109 is vapor-deposited on the piezoelectric ceramic 105.
  • a rear copper layer 110 which is also vapor-deposited on the piezoelectric ceramic 105.
  • a PU plate 111, a GRP plate 112, a brass block 113 and a rubber layer 114 All the materials mentioned are surrounded by a PU mass 115.
  • the material thickness 117 of the GFK carrier 103 in the sound direction behind the piezoelectric ceramic 105 is 1/9 of the total material thickness 118 of the GFRP carrier 103.
  • the GFRP carrier 103 has, in addition to the piezoelectric ceramic 105, a steel cover 121, behind which a rubber layer 122 follows in the sound pressure direction 102.
  • the GFRP carrier 103 and the PU high-frequency absorber 104 are both adhesively bonded to a PU mass 119 in a GFRP holder 120.
  • the Hydrofon 101 is attached to a submarine. In the immediate vicinity of the submarine under mine water demolition takes place. This leads to the explosion of a mine, so that a shock-sound pressure wave with the sound pressure direction 102 impinges on the hydrophone 101.
  • the sound pressure wave initially strikes the aluminum plate 107, which reflects part of the sound pressure wave.
  • the aluminum plate 107 is elastically connected to the underlying GRP plate 108, which is designed as a pressure plate.
  • the piezoelectric ceramic 105 is elastically compressed and an electric voltage occurs on the solid. The voltage is dissipated via the front conductive copper layer 109 and the rear conductive copper layer 110. Electrically, the piezoelectric ceramic 105 is connected via cables passing through the PU mass 115 and the rubber layer 122 (not shown in FIG. 1).
  • the two absorbers 116 in the GFRP carrier next to the piezoelectric ceramic 105 have the task of absorbing transverse waves of the shock-sound pressure wave.
  • the entire GFRP support 103 is elastic and capable of oscillating.
  • the GFRP support 103 can swing in the middle under the piezoelectric ceramic 105 both in the sound pressure direction 102 (also referred to in the Y direction in FIG. 1) and at the edges transversely (in the X direction). These vibrations further dampen the sound pressure.
  • Carrier 103 the PU mass 119 is arranged, the GFK carrier 103 can swing and there is only one elastic connection to the downstream PU high-frequency absorber 104.
  • the hydrophone 101 of the absorber 104 remains intact even when the shockwave pressure wave.
  • a Bugsonar 201 has a
  • GFRP carrier 203 with eleven piezoelectric ceramics 205, which are arranged concave against the sound pressure direction 202 in a semicircle. Between the piezoelectric ceramics 205, a PU compound 215 having a layer thickness of 0.5 mm is arranged. [104] In sound pressure direction 202 behind the piezoelectric ceramics 205 are brass blocks
  • the GRP carrier 203 is connected to two center beams 207.
  • the two center supports 207 are centrally spaced from each other, so that a guide gap 208 passes through which cables are guided. Accordingly, the GRP carrier 203 has a cable feedthrough 210 in the middle. The cables are guided strain-relieved between the piezoelectric ceramics (not shown in Figure 2).
  • the two center supports 207 are connected to a swing beam 206.
  • the vibrating support 206 is connected to a PU mass 211 and in the direction of sound pressure 202, the PU high-frequency absorber 204 follows behind.
  • the vibrating support 206 and the PU high-frequency absorber 204 are glued to the PU mass 211 with a holder 216.
  • the GFRP support 203 has a diameter of 2m.
  • a polyoxymethylene layer 212 is arranged in sound pressure direction 102 behind the GFK carrier 203. After the polyoxymethylene layer 212 is followed by another PU absorber
  • the Bugsonar 201 is located at the bow of a
  • GRP carrier 203 but also transversely (in the X direction). These transverse pressure waves are caused by the
  • Polyoxymethylene layer 212 and the upstream absorber 214 attenuated. Due to this embodiment of the Bugsonars 201, the PU high-frequency absorber 204 remains intact even when the shockwave pressure wave strikes.
  • center girders 208 guide gap

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne un système transducteur servant à émettre et/ou à recevoir des signaux sous-marins acoustiques. Ledit système transducteur comporte un support de transducteur et un absorbeur acoustique. Un élément transducteur acoustique est disposé sur le support de transducteur, et d'abord le support de transducteur puis, derrière, l'absorbeur acoustique sont disposés l'un derrière l'autre dans une direction de pression sonore. Le support de transducteur est configuré de manière élastique si bien que le support de transducteur élastique est en mesure mécaniquement d'osciller et est sensiblement découplé de l'absorbeur acoustique de sorte que l'absorbeur acoustique reste intact lors de l'arrivée d'une onde de choc de pression sonore sur le système transducteur. L'invention concerne par ailleurs un dispositif transducteur composé de deux systèmes transducteurs ou plus, un sonar et un véhicule aquatique.
PCT/DE2016/100095 2015-04-09 2016-03-02 Système transducteur, dispositif transducteur et sonar et véhicule aquatique WO2016162008A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16715790.8A EP3280545A1 (fr) 2015-04-09 2016-03-02 Système transducteur, dispositif transducteur et sonar et véhicule aquatique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015105430.2 2015-04-09
DE102015105430.2A DE102015105430A1 (de) 2015-04-09 2015-04-09 Wandlereinrichtung, Wandlervorrichtung, Sonar und Wasserfahrzeug

Publications (1)

Publication Number Publication Date
WO2016162008A1 true WO2016162008A1 (fr) 2016-10-13

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EP (1) EP3280545A1 (fr)
DE (1) DE102015105430A1 (fr)
WO (1) WO2016162008A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020202275A1 (de) 2020-02-21 2021-08-26 Atlas Elektronik Gmbh Wasserschallwandler
DE102020208570A1 (de) 2020-07-08 2022-01-13 Atlas Elektronik Gmbh Wasserschallwandler mit einer gerichteten Strahlungscharakteristik

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GB2212695A (en) * 1987-11-19 1989-07-26 Krupp Atlas Elektronik Gmbh Piezoelectric transducer element
US5265552A (en) * 1991-09-20 1993-11-30 Taylor Devices, Inc. Shock and vibration isolator for member mounted on submerged body
US5335209A (en) * 1993-05-06 1994-08-02 Westinghouse Electric Corp. Acoustic sensor and projector module having an active baffle structure
DE60207628T2 (de) * 2001-04-12 2006-07-06 Thales Schallsäule und zylindrische Antenne für ein passives Sonargerät, welches eine solche Schallsäule verwendet

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DE3834669C2 (de) * 1988-10-12 1996-11-28 Stn Atlas Elektronik Gmbh Akustische Dämmungsvorrichtung für Seitenantennen bei Unterwasserfahrzeugen
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DE102006060796B4 (de) * 2006-12-21 2010-09-02 Atlas Elektronik Gmbh Unterwasserantenne
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Publication number Priority date Publication date Assignee Title
GB2212695A (en) * 1987-11-19 1989-07-26 Krupp Atlas Elektronik Gmbh Piezoelectric transducer element
US5265552A (en) * 1991-09-20 1993-11-30 Taylor Devices, Inc. Shock and vibration isolator for member mounted on submerged body
US5335209A (en) * 1993-05-06 1994-08-02 Westinghouse Electric Corp. Acoustic sensor and projector module having an active baffle structure
DE60207628T2 (de) * 2001-04-12 2006-07-06 Thales Schallsäule und zylindrische Antenne für ein passives Sonargerät, welches eine solche Schallsäule verwendet

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DE102015105430A1 (de) 2016-10-13
EP3280545A1 (fr) 2018-02-14

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