EP2367640B1 - Schallwellenwandler und sonarantenne mit verbesserter ausrichtung - Google Patents

Schallwellenwandler und sonarantenne mit verbesserter ausrichtung Download PDF

Info

Publication number
EP2367640B1
EP2367640B1 EP09805787.0A EP09805787A EP2367640B1 EP 2367640 B1 EP2367640 B1 EP 2367640B1 EP 09805787 A EP09805787 A EP 09805787A EP 2367640 B1 EP2367640 B1 EP 2367640B1
Authority
EP
European Patent Office
Prior art keywords
transducer
acoustic
housing
axis
horn
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.)
Active
Application number
EP09805787.0A
Other languages
English (en)
French (fr)
Other versions
EP2367640A1 (de
Inventor
Frédéric MOSCA
Pascal Girardi
Robert Girault
Yann Cottreau
Guillaume Matte
Samuel Thomas
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.)
iXBlue SAS
Original Assignee
iXBlue SAS
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 iXBlue SAS filed Critical iXBlue SAS
Publication of EP2367640A1 publication Critical patent/EP2367640A1/de
Application granted granted Critical
Publication of EP2367640B1 publication Critical patent/EP2367640B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B06B1/0611—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 in a pile
    • B06B1/0618—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 in a pile of piezo- and non-piezoelectric elements, e.g. 'Tonpilz'
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Definitions

  • the present invention relates to an electro-acoustic transducer for a sonar antenna.
  • An electro-acoustic transducer is used for transmitting and / or receiving acoustic pressure waves.
  • an acoustic transducer transforms an electric potential difference into an acoustic pressure wave (and vice versa into a reception mode).
  • piezo-acoustic transducers there are different types of electro-acoustic transducers. In the remainder of this document we are particularly interested in the piezo-acoustic transducers of Tonpilz and Janus-Helmholtz type. These transducers comprise a piezoelectric motor, generally consisting of a stack of piezoelectric ceramics and electrodes, this piezoelectric motor being connected on the one hand to a counterweight and on the other hand to a flag.
  • the piezoelectric motor assembly, counterweight and horn is connected by a prestressing rod and constitutes a resonator whose resonance frequency depends in particular on the dimensions of the horn, the motor and the counterweight.
  • the piezo-acoustic resonator is usually placed in a waterproof protective case.
  • the outer face of the flag is in direct contact with the immersion medium or placed behind an acoustically transparent membrane.
  • the inner cavity of the housing is filled with either air or a fluid selected to have a good acoustic impedance without loss, without impedance breaking with water.
  • the fluid used is usually an oil.
  • the cavity is filled with air, the acoustic coupling between the transducer and the immersion medium is through the outer face of the flag.
  • the acoustic coupling between the transducer and the immersion medium is through the horn through the oil and the housing.
  • the immersed transducer transforms the vibration wave of the resonator into an acoustic pressure wave propagating in the immersion medium.
  • An electro-acoustic transducer makes it possible to sound an acoustic echo.
  • the specific response of a transducer depends on the frequency, the bandwidth and the direction of the echo with respect to the transmitting / receiving axis of the transducer.
  • the transducer In bathymetry applications, the transducer is placed vertically to probe echo from the sea floor. It is therefore essential to sound acoustic waves in a specific direction. Indeed, the secondary echo sources generate noise and reduce the sensitivity of the device.
  • a directivity diagram represents the acoustic intensity as a function of the measurement direction (angularly marked).
  • the directivity diagram indicative of the response of a Tonpilz transducer as a function of the direction with respect to the acoustic axis of the transducer is shown schematically on the figure 2 .
  • This diagram 12 being symmetrical with respect to the acoustic axis 7 of the transducer (axis 0-180 °) only a half-diagram is shown.
  • the curve of this diagram is a sound intensity level curve.
  • a main lobe 13 centered on the acoustic axis 7 of the transducer and oriented in the X direction towards the front of the flag.
  • the diagram of the figure 2 also has a rear lobe 14, on the acoustic axis and in the X 'direction opposite to the main lobe 13. Also observed on the figure 2 secondary lobes 15, 15 ', 15 "parasitic in directions between 40 ° and 140 ° with respect to the acoustic axis The presence of secondary lobes impairs the directivity of the transducer, which receives and / or emits acoustic energy in different directions the X direction of the axis of the transducer to the front of the flag.
  • Tonpilz transducers operate at frequencies between 1 kHz and 800 kHz.
  • the problem of side lobes appears when the characteristic dimension of the emitting face is of the order or greater than the working wavelength.
  • the problem of secondary lobes therefore appears more easily at high frequencies> 50 kHz (because the wavelengths become of the order of a centimeter).
  • a Janus-Helmholtz transducer comprises indeed two piezo-acoustic motors aligned along the same axis and fixed on a central contermasse, each piezo-acoustic motor being connected to a horn by a prestressing rod. The two flags are thus located at opposite ends on the axis of the device and symmetrical with respect to a plane transverse to the axis.
  • a Janus-Helmholtz transducer makes it possible to work at lower frequencies (from 150 Hz to 20 kHz) than a Tonpilz transducer.
  • the directivity diagram of a Janus-Helmholtz type transducer operating at very low frequency is generally very non-directive. This diagram is symmetrical with respect to the transverse plane of symmetry. However, it has two power maxima on the axis of the transducer in the forward direction of each flag. But the power emitted or received in the direction transverse to the acoustic axis can also induce disturbances. In addition, when a Janus-Helmholtz transducer is used at a relatively higher frequency, side lobes also appear.
  • the counterweight of the transducer serves as a vibration node and is therefore an important fixed point for the directivity of the transducer.
  • the directivity of the transducer is improved by connecting the counterweight to the housing by a metal plate (aluminum, stainless steel, steel, etc.).
  • the secondary lobes in site around the normal to the acoustic axis are one of the major restrictions of a sonar antenna, and whatever the type of transducer used (cf. figure 2 ). Indeed these secondary lobes cause the presence of surface echoes and significantly degrade the contrast on the system's shadow.
  • the document US 4,031,418 discloses an electro-acoustic transducer and mentions the use of a deformable envelope of absorbent material.
  • the document US 3,474,403 discloses an electro-acoustic transducer having improved impact resistance.
  • One of the aims of the invention is to improve the directivity of an electro-acoustic transducer of the Tonpilz or Janus-Hemholtz type.
  • Another object of the invention is the reduction of the housing lobes in an electro-acoustic type transducer.
  • the present invention provides an acoustic wave transducer as defined in independent claim 1.
  • the housing extends longitudinally along the axis of the transducer and is of thickness E, said thickness E being greater than the acoustic wavelength ⁇ corresponding to the frequency f in the housing to absorb a portion of the acoustic waves at the frequency f in at least one direction transverse to the axis.
  • the attenuation means may further comprise a reflective sheath around the diffractive grating and suspension means capable of damping the coupling of acoustic waves between the reflecting sheath and the absorbent sheath.
  • the reflective sheath is made of aluminum
  • the absorbent sheath is made of polymer resin or syntactic foam
  • the viscoelastic polymer suspension means is made of aluminum
  • the reflective sheath is of convex outer shape so as to attenuate a part of the acoustic waves originating from the immersion medium in directions transverse to the axis.
  • the transducer is a Tonpilz type transducer, comprising an elongated piezoelectric motor, said motor comprising a stack of piezoelectric components and electrodes, the stack being connected along an axis of symmetry. at one end to the pavilion and at the other end to the counterpart.
  • the transducer is a Janus-Helmholtz-type transducer, comprising two elongated piezo-electric motors whose axes are aligned, each motor comprising a stack of piezoelectric components and electrodes, the stacking being connected along an axis of symmetry at one end to a horn and at the other end to a central counterweight common to both engines, said transducer comprising two housings surrounding each engine-flag subassembly.
  • the invention also relates to a sonar antenna comprising a plurality of transducers, said transducers being placed in a common housing according to one of the preceding embodiments.
  • the figure 1 represents a partial view of a Tonpilz transducer (the housing is not shown), the transducer being symmetrical about the acoustic axis 7.
  • the transducer comprises an electro-acoustic motor 1 connected to a horn 4 and a counter-emitter 5 by a prestressing rod 6.
  • this motor comprises piezoelectric ceramics connected to electrodes 3 which are subjected to a sinusoidal voltage. Piezoelectric ceramics thus undergo a sinusoidal mechanical deformation in the polarization direction of the ceramics.
  • the flag 4 provides a dual function of broadening the bandwidth of the transducer due to its own mode of swirling and acoustic impedance matching between the ceramic and the fluid medium.
  • the counterweight 5 stabilizes the assembly and shifts the nodal plane of vibration towards the rear of the transducer ensuring a maximum transmission of energy in the desired direction of the acoustic axis forward of the flag 4.
  • the prestressing rod 6 maintains the acoustic motor-horn-counterweight unit under prestressing so as to ensure its compression-only operation.
  • the Tonpilz transducer is integrated in a housing 8 (not shown on the figure 1 ) filled with oil 10 to ensure pressure balance with the immersion medium into which the transducer is immersed.
  • the counterweight 5 is mounted in force in the housing 8.
  • the side lobes or housing lobes (cf. Figure 2 ) are a disadvantage known for many years in transducers and in particular Tonpilz type transducers.
  • the inventors have analyzed the behavior of such a transducer. According to this analysis, the generation of these so-called “housing" side lobes is due to a coupling between the elements of the transducer (horn and counter), the fluid in which the resonator and the casing are immersed. This coupling results in the generation of four shear waves from two sources 16 and 16 'within the housing 8, each of the sources 16, 16' generating two shear waves in opposite directions. The origin of the secondary lobes is a coupling linked to a mode conversion of a shear wave propagating in the case. A first coupling acoustic coupling takes place between the fluid 9 and the housing 8.
  • This coupling generates a first source 16 of shear waves, schematically represented at the flag in the housing.
  • Unexpectedly coupling does not occur only at the interface between the fluid medium and the housing but a second mechanical coupling is at the counterweight.
  • the countermass is not necessarily a perfectly immobile vibration node, but undergoes displacements transverse to the axis. These displacements induce shear waves from a secondary focus 16 'shown schematically on the figure 3 in the box opposite the counterweight.
  • the combination of coupling waves from the two foci 16 and 16 'further produces interfering waves.
  • the invention proposes various complementary means for trapping the energy of the side lobes.
  • the figure 4 schematically represents a portion of a box view in section comprising different means of attenuation of acoustic waves. These means are advantageously arranged on the sides of the housing which extend longitudinally with respect to the acoustic axis 7 of transmission / reception of the transducer, so as to attenuate the acoustic waves propagating in substantially transverse directions (90 ⁇ 40 degrees ) the acoustic axis 7.
  • the attenuation means may be placed on one or more sidewalls around the axis, or form a continuous sheath surrounding the periphery of the housing around the acoustic axis.
  • a first means consists in increasing the thickness of the housing so that it is greater than the acoustic wavelength ⁇ corresponding to the frequency f in the housing.
  • the thickness of the housing is equal to about 2 ⁇ or 3 ⁇ .
  • Such a housing thickness makes it possible to convert the shear wave into a compression wave.
  • a Tonpilz transducer whose frequency is 100 kHz
  • a 2.5-3 cm thickness envelope is well suited.
  • the adapted thickness will be proportional to the frequency.
  • the thickness of the housing is uniform on all the faces of the housing extending longitudinally with respect to the axis.
  • the rear face of the housing also has a thickness greater than ⁇ , so as to attenuate the rear lobe 13 in the X 'direction opposite to the acoustic transmission / reception X direction.
  • a case thickness greater than ⁇ , or even equal to 2 ⁇ or 3 ⁇ can be obtained by directly manufacturing a case having such a thickness.
  • a second housing whose inner shape is adapted to the outer shape of the initial housing so that the total thickness of the housing thus obtained has a total thickness greater than ⁇ .
  • a second means consists in arranging around the casing 8 an absorbent sheath 17 so as to absorb the energy of the shear waves converted into compression waves.
  • the absorbent sheath is made of a softer material than the housing, for example a polymer resin.
  • Above the absorbent structure can also be placed a layer of foam to impose a second path in the structure and thus double the attenuation.
  • a third means consists in placing a diffractive grating 19 on the surface of the absorbent sheath.
  • the grating 19 may be a one-dimensional grating with a pitch and a depth of the order of one half-wavelength.
  • the network 19 can also be two-dimensional.
  • a fourth means consists in placing a reflective sheath 18 around the absorbent sheath and the diffractive grating so as to increase the shear waves that are converted into compression waves in the absorbing medium.
  • the reflective sheath 18 may comprise for example a reflective envelope made of a material having a high impedance contrast with the absorbent sheath. A strong impedance break is necessary for the reflective material which may for example be a metal.
  • This structure finally requires suspension means of the reflective material, so as to isolate this material and avoid transmission by vibratory coupling in the undesired direction.
  • the suspension means advantageously comprise a viscoelastic polymer.
  • the surface of the reflective layer 18 is of concave shape seen from the sources 16 and 16 '.
  • the order in which the side lobe attenuation means are assembled from the axis of the transducer to the outside of the housing is important and is preferably the order indicated above.
  • Attenuation means may be placed on the rear face of the housing.
  • the various technical means used have an additive effect for improving the directivity of the transducer and reducing the secondary lobes.
  • the figure 5 represents a simulation of the directivity diagram of the same Tonpilz transducer as that of the figure 2 , but provided with the means described above, and more precisely of all the accumulated means except the reflective sheath.
  • We observe on the figure 5 a very strong reduction of the side lobes, which have almost disappeared.
  • the rear lobe 14 is also reduced.
  • the directivity of the transducer is thus considerably improved.
  • the device of the invention thus makes it possible to improve the directivity and the sensitivity of an electro-acoustic transducer.
  • the invention can adapt to any type of sonars with a slight modification of the outer envelope of the transducer.
  • the invention applies in particular to Janus-Helmholtz type transducers, as shown diagrammatically in section. figure 6 .
  • the Janus-Helmholtz transducer comprises two piezo-acoustic motors respectively 1 and 21 aligned along the same axis 7 and fixed on a central contermasse 5.
  • Each piezo-acoustic motor 1, 21 is connected to a roof 4, 24 by a prestressing rod .
  • the two flags 4, 24 are thus located at opposite ends on the axis 7 of the device.
  • a housing 8, respectively 28 surrounds each motor-horn subassembly 1 and 4, respectively 21 and 24.
  • the counterweight is fixed by a metal plate on the one hand to the housing 8 and on the other hand to the housing 28.
  • each housing 8, 28 is filled with a fluid.
  • the housings 8 and 28 can be modified so that they comprise means of attenuation of acoustic waves emitted and / or received in directions transverse to the acoustic axis 7.
  • One or more wave attenuation means may be applied in a direction transverse to the housing of each of the two coaxial resonators.
  • the first means consists in using casings 8 and 28 with a thickness greater than ⁇ , and preferably equal to 2 ⁇ or 3 ⁇ .
  • a second means consists in fixing an absorbent sheath on a wall of the housing extending longitudinally along the axis 7.
  • a third means consists in placing on the surface of the absorbent sheath a diffractive grating.
  • a fourth means consists in placing a reflective sheath around the absorbent sheath and the diffracting grating so as to increase the shear waves that are converted into compression waves in the absorbing medium.
  • the Janus-Helmholtz transducer provided with these acoustic wave attenuation means transverse to the acoustic axis 7 has an improved directivity.
  • the invention will find a particularly advantageous application in sonar antennas.
  • the figure 7 schematically represents a sonar antenna seen from the front.
  • the antenna comprises a plurality of transducers.
  • On the example of the figure 7 four pavilions of Tonpilz transducers are aligned in the same housing 8.
  • the figure 7 represents an absorbent sheath disposed on one side of the sonar. Absorbent sheath portions may be disposed on the other sides of the housing which extend longitudinally along the axis 7 of the flags 4 of the transducers.
  • the absorbent sheath is placed on a wall of the housing whose thickness is greater than ⁇ in a direction of emission of the side lobes.
  • the absorbent sheath 17 advantageously cooperates with a reflecting medium 18, and a diffractive grating 18.
  • the absorption means may comprise separate elements on external sides of the housing, or a continuous sheath on the periphery of the housing in a plane perpendicular to the acoustic axis.
  • the invention thus makes it possible to eliminate the secondary lobes of a sonar antenna formed of a set of transducers having substantially the same acoustic axis.
  • the invention makes it possible to considerably improve the directivity of such a sonar antenna as well as its rear rejection.
  • the invention also applies to piezo-electric transducers of "sawed” or glue-type technology used in medical ultrasound or quarter-wave plate probes ("Diagnostic Ultrasound Imaging", Elsevier, Thomas L. Szabo). .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Claims (8)

  1. Schallwellenwandler, der dazu bestimmt ist, eingetaucht zu werden, mit:
    - wenigstens einem elektroakustischen Motor (1, 21),
    - einem Schalltrichter (4, 24) mit einer inneren Wand und einer äußeren Wand,
    - einer Gegenmasse (5) und
    - einem hohlen Gehäuse (8, 28) mit einer inneren Wand und einer äußeren Wand und wenigstens einer Schallöffnung,
    - wobei der Motor (1, 21) einerseits mit dem Schalltrichter (4, 24) und andererseits mit der Gegenmasse (5) auf einer Achse (7) verbunden ist, wobei der Motor (1, 21) dazu ausgelegt ist, den Schalltrichter (4, 24) um wenigstens eine akustische Resonanzfrequenz f herum anzuregen,
    - wobei das Gehäuse (8, 28) mit der Gegenmasse (5) verbunden ist und den Motor (1, 21) und den Schalltrichter (4, 24) umgibt, wobei die äußere Wand des Schalltrichters gegenüber der Schallöffnung des Gehäuses (8, 28) angeordnet ist und der Raum zwischen der inneren Wand des Gehäuses (8, 28) und der inneren Wand des Schalltrichters eine ein Fluid (10) enthaltende Kammer (9) bildet,
    - wobei der Wandler mit einer äußeren Wand des Gehäuses (8, 28) fest verbundene akustische Dämpfungsmittel aufweist, wobei sich die Wand längs zur Achse des Wandlers erstreckt, um die ausgesendeten und/oder empfangenen Schallwellen bei der Frequenz f in wenigstens einer zur Achse (7) quer verlaufenden Richtung zu dämpfen,
    dadurch gekennzeichnet, daß die Dämpfungsmittel
    - eine absorbierende Umhüllung (17), die an der äußeren Wand des Gehäuses (8, 28) befestigt ist und dazu ausgelegt ist, Schallwellen bei der Frequenz f in wenigstens einer zur Achse (7) quer verlaufenden Richtung zu absorbieren,
    - ein die absorbierende Umhüllung (17) umgebendes Streugitter (19), wobei das Gitter (19) dazu ausgelegt ist, die Schallwellen im Durchlaßbereich des Wandlers zu streuen,
    aufweisen.
  2. Wandler gemäß Anspruch 1, dadurch gekennzeichnet, daß sich das Gehäuse zur Achse (7) längs erstreckt und eine Dicke E aufweist, wobei die Dicke E größer als die der Frequenz f im Gehäuse entsprechende Schallwellenlänge λ ist, um einen Teil der Schallwellen bei der Frequenz f in wenigstens einer zur Achse (7) quer verlaufenden Richtung zu absorbieren.
  3. Wandler gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Dämpfungsmittel außerdem eine reflektierende Hülle (18) um das Streugitter (19) herum und Aufhängungsmittel, die dazu ausgelegt sind, die Kopplung von Schallwellen zwischen der reflektierenden Hülle (18) und der absorbierenden Hülle (17) zu dämpfen.
  4. Wandler gemäß Anspruch 3, dadurch gekennzeichnet, daß die reflektierende Hülle aus Aluminium, die absorbierende Hülle (17) aus Polymerharz oder aus syntaktischem Schaum und die Aufhängungsmittel aus viskoelastischem Polymer sind.
  5. Wandler gemäß einem der Ansprüche 3 bis 4, dadurch gekennzeichnet, daß die reflektierende Hülle (18) eine äußere bauchige Form hat, um einen Teil der ausgesendeten und/oder empfangenen Schallwellen in zur Achse (7) quer verlaufenden Richtungen zu dämpfen.
  6. Wandler gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Wandler ein Wandler vom Typ Tonpilz ist, der einen langgestreckten piezoelektrischen Motor (1) aufweist, wobei der Motor (1) einen Stapel piezoelektrischer Bauteile und Elektroden aufweist, wobei der Stapel in der Richtung einer Symmetrieachse (7) an einem Ende mit dem Schalltrichter (4) und an dem anderen Ende mit der Gegenmasse (5) verbunden ist.
  7. Wandler gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Wandler ein Wandler vom Typ Janus-Helmholtz ist, der zwei langgestreckte piezoelektrische Motoren (1, 21) aufweist, deren Achsen aufeinander ausgerichtet sind, wobei jeder Motor (1, 21) einen Stapel piezoelektrischer Bauteile und Elektroden aufweist, wobei der Stapel in der Richtung einer Symmetrieachse an einem Ende mit einem Schalltrichter (4, 24) und an dem anderen Ende mit einer zentralen, beiden Motoren (1, 21) gemeinsamen Gegenmasse (5) verbunden ist, wobei der Wandler zwei jede Untereinheit Motor-Schalltrichter umgebende Gehäuse (8, 28) aufweist.
  8. Sonarantenne mit einer Anzahl Wandler gemäß einem der Ansprüche 1 bis 7, wobei die Wandler in einem gemeinsamen Gehäuse untergebracht sind.
EP09805787.0A 2008-12-23 2009-12-23 Schallwellenwandler und sonarantenne mit verbesserter ausrichtung Active EP2367640B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0859015A FR2940579B1 (fr) 2008-12-23 2008-12-23 Transducteur d'ondes acoustiques et antenne sonar de directivite amelioree.
PCT/FR2009/052682 WO2010072984A1 (fr) 2008-12-23 2009-12-23 Transducteur d'ondes acoustiques et antenne sonar de directivite amelioree

Publications (2)

Publication Number Publication Date
EP2367640A1 EP2367640A1 (de) 2011-09-28
EP2367640B1 true EP2367640B1 (de) 2019-01-09

Family

ID=40790865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09805787.0A Active EP2367640B1 (de) 2008-12-23 2009-12-23 Schallwellenwandler und sonarantenne mit verbesserter ausrichtung

Country Status (6)

Country Link
US (1) US8780674B2 (de)
EP (1) EP2367640B1 (de)
JP (1) JP5504276B2 (de)
CA (1) CA2748383A1 (de)
FR (1) FR2940579B1 (de)
WO (1) WO2010072984A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11681044B2 (en) 2021-06-21 2023-06-20 Navico, Inc. Sonar beam shape controlling horn

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2971112B1 (fr) * 2011-02-01 2014-01-03 Ixblue Transducteur electro-acoustique basse frequence et procede de generation d'ondes acoustiques.
JP5990930B2 (ja) * 2012-02-24 2016-09-14 セイコーエプソン株式会社 超音波トランスデューサー素子チップおよびプローブ並びに電子機器および超音波診断装置
GB2557345B (en) * 2016-12-08 2021-10-13 Bae Systems Plc MIMO communication system and data link
CN110010113B (zh) * 2019-04-04 2023-12-08 哈尔滨工程大学 径向辐射的杰纳斯-亥姆霍兹水声换能器
CN112040382B (zh) * 2020-08-10 2021-07-30 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) 基于声阻抗梯度匹配层的高频宽带水声换能器

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474403A (en) * 1966-06-08 1969-10-21 Dynamics Corp Massa Div Electroacoustic transducer with improved shock resistance
US3593257A (en) * 1968-06-14 1971-07-13 Dynamics Corp America Electroacoustic transducer
FR2284242A1 (fr) * 1974-09-09 1976-04-02 France Etat Transducteur piezoelectrique a basse frequence
FR2361033A1 (fr) * 1976-08-03 1978-03-03 France Etat Transducteurs piezoelectriques et antennes acoustiques immergeables a grande profondeur
US5243567A (en) * 1977-03-15 1993-09-07 Westinghouse Electric Corp. Sonar beam shaping with an acoustic baffle
US4164727A (en) * 1977-04-14 1979-08-14 The United States Of America As Represented By The Secretary Of The Navy Underwater acoustic absorber
JPS62154897A (ja) 1985-12-26 1987-07-09 Toshiba Corp デジタルネツトワ−ク装置
JPH0318230Y2 (de) * 1986-03-19 1991-04-17
JPS63144697A (ja) 1986-12-08 1988-06-16 Nec Corp 送受波器
FR2665998B1 (fr) * 1988-05-05 1993-10-29 Etat Francais Delegue Armement Procedes et transducteurs electro-acoustiques pour emettre des ondes acoustiques a basse frequence dans un liquide.
JPH0764308B2 (ja) 1989-08-15 1995-07-12 ジル・ア・グロッソ 水中ケーシング内のガス圧力を外部圧力と平衡状態に保持する方法及び装置
DE3931453C1 (de) * 1989-09-21 1991-02-28 Endress U. Hauser Gmbh U. Co, 7864 Maulburg, De
JPH0646495A (ja) 1992-02-19 1994-02-18 Hitachi Medical Corp 超音波探触子
US5436874A (en) * 1993-11-17 1995-07-25 Martin Marietta Corporation Method and apparatus for sensing acoustic signals in a liquid
FR2731129B1 (fr) * 1995-02-23 1997-04-11 France Etat Procede et dispositif pour diminuer la frequence de resonance des cavites des transducteurs immergeables
FR2739522B1 (fr) * 1995-09-28 1997-11-14 France Etat Antenne de sonar
FR2779533B1 (fr) 1998-06-09 2000-08-25 Total Sa Dispositif d'acquisition sismique a haute resolution
US6232702B1 (en) * 1998-08-18 2001-05-15 The Penn State Research Foundation Flextensional metal-ceramic composite transducer
JP2002204498A (ja) * 2000-12-28 2002-07-19 Ngk Spark Plug Co Ltd 超音波センサ
US7309948B2 (en) * 2001-12-05 2007-12-18 Fujifilm Corporation Ultrasonic transducer and method of manufacturing the same
US6731466B2 (en) * 2002-04-25 2004-05-04 International Business Machines, Inc. Suspension with integral constrained and sandwiched layer damping
US20050075571A1 (en) * 2003-09-18 2005-04-07 Siemens Medical Solutions Usa, Inc. Sound absorption backings for ultrasound transducers
US8004935B2 (en) * 2007-05-10 2011-08-23 Second Wind Systems, Inc. Sodar housing with non-woven fabric lining for sound absorption

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11681044B2 (en) 2021-06-21 2023-06-20 Navico, Inc. Sonar beam shape controlling horn

Also Published As

Publication number Publication date
FR2940579B1 (fr) 2012-09-28
CA2748383A1 (fr) 2010-07-01
EP2367640A1 (de) 2011-09-28
US8780674B2 (en) 2014-07-15
WO2010072984A1 (fr) 2010-07-01
FR2940579A1 (fr) 2010-06-25
JP5504276B2 (ja) 2014-05-28
JP2012513718A (ja) 2012-06-14
US20110255375A1 (en) 2011-10-20

Similar Documents

Publication Publication Date Title
EP2367640B1 (de) Schallwellenwandler und sonarantenne mit verbesserter ausrichtung
EP1222653B1 (de) Breitbandiger unterwasser-schallwandler
EP0769988B1 (de) Akustischer breitbandwandler für mehrere frequenzen
FR2962533A1 (fr) Couches de transfert thermique et d'adaptation acoustique pour transducteur ultrasonore
EP2670536B1 (de) Elektroakustischer niederfrequenzwandler und verfahren zur erzeugung von schallwellen
FR2980326A1 (fr) Couches de transmission thermique et d'adaptation acoustique pour transducteur ultrasonore
FR2688112A1 (fr) Transducteurs electro-acoustiques directifs comportant une coque etanche en deux parties.
EP0317380A1 (de) Bekleidung mit niedriger Schallrefektion
EP3463691A1 (de) Anordnung von ultraschallwandlerelementen
EP3198586B1 (de) Rundstrahlantenne
EP0728535B1 (de) Verfahren und Vorrichtung zur Verminderung der Resonanzfrequenz von Hohlräumen von Unterwasserwandlern
FR2866112A1 (fr) Sonde de jaugeage de liquide
EP0656232B1 (de) Verfahren zum Hochleistungsemission von akustischen Wellen und damit übereinstimmende Wandlerhorne
FR2688972A1 (fr) Transducteurs electro-acoustiques comportant une coque emettrice flexible et etanche.
EP3014606B1 (de) Ultraschallwandler
FR2503517A1 (fr) Transducteur piezo-electrique
FR3075972A1 (fr) Systeme de transmission et/ou de reception d'onde acoustique optimisant le transfert d'energie acoustique entre un emetteur et/ou un recepteur acoustique
EP0088653B1 (de) Elektroakustische Verzögerungsleitung
FR2990925A1 (fr) Ensemble de coque metallique pour vehicule discret ou furtif
FR3090421A1 (fr) Transducteur ultrasonore à membrane vibrante à effet capacitif à large bande passante
FR2788928A1 (fr) Hydrophone directif a large bande, notamment pour antenne acoustique lineaire remorquee
FR2760094A1 (fr) Dispositif acoustique pour mesurer le mouvement d'un fluide

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

17P Request for examination filed

Effective date: 20110621

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: MOSCA, FREDERIC

Inventor name: MATTE, GUILLAUME

Inventor name: COTTREAU, YANN

Inventor name: GIRAULT, ROBERT

Inventor name: GIRARDI, PASCAL

Inventor name: THOMAS, SAMUEL

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180817

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

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

Owner name: IXBLUE

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM 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: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1086655

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190115

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602009056668

Country of ref document: DE

REG Reference to a national code

Ref country code: NO

Ref legal event code: T2

Effective date: 20190109

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190109

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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: 20190109

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1086655

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190109

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: 20190109

Ref country code: PL

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: 20190109

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: 20190509

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: 20190109

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: 20190109

Ref country code: LT

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: 20190109

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

Ref country code: LV

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: 20190109

Ref country code: HR

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: 20190109

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: 20190410

Ref country code: BG

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: 20190409

Ref country code: IS

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: 20190509

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602009056668

Country of ref document: DE

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: 20190109

Ref country code: AT

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: 20190109

Ref country code: EE

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: 20190109

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: 20190109

Ref country code: CZ

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: 20190109

Ref country code: RO

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: 20190109

Ref country code: SK

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: 20190109

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: SM

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: 20190109

26N No opposition filed

Effective date: 20191010

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

Ref country code: SI

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: 20190109

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: 20190109

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602009056668

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20191231

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

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: 20191223

Ref country code: LU

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

Effective date: 20191223

Ref country code: DE

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

Effective date: 20200701

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

Ref country code: CH

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

Effective date: 20191231

Ref country code: BE

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

Effective date: 20191231

Ref country code: LI

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

Effective date: 20191231

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: 20190109

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

Ref country code: MT

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: 20190109

Ref country code: HU

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

Effective date: 20091223

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

Ref country code: MK

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: 20190109

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: NO

Ref legal event code: CHAD

Owner name: EXAIL, FR

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230524

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

Ref country code: FR

Payment date: 20230901

Year of fee payment: 15

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

Ref country code: GB

Payment date: 20231002

Year of fee payment: 15

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

Ref country code: NO

Payment date: 20231222

Year of fee payment: 15