EP1222653B1 - Transducteur acoustique sous-marin a large bande - Google Patents
Transducteur acoustique sous-marin a large bande Download PDFInfo
- Publication number
- EP1222653B1 EP1222653B1 EP00967997A EP00967997A EP1222653B1 EP 1222653 B1 EP1222653 B1 EP 1222653B1 EP 00967997 A EP00967997 A EP 00967997A EP 00967997 A EP00967997 A EP 00967997A EP 1222653 B1 EP1222653 B1 EP 1222653B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- cap
- transducer
- transducer according
- cover
- 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
Links
- 239000000463 material Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 description 14
- 230000009471 action Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
-
- 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
- G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
-
- 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
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/20—Sounding members
Definitions
- the present invention relates to acoustic transducers broadband submarines which are basically used as acoustic signal transmitters in the active sonar of buildings in area. However, these transducers can also be used as receivers, as well as in submarine sonar.
- transmitter transducers are type says “tonpilz”. These transducers use a transmitter horn which is excited by a ceramic pillar which rests on a counter mass.
- the invention proposes a wideband underwater acoustic transducer, comprising at least a piezoelectric plate operating in flexion, mainly characterized in that it further comprises a cylindrical cover closed at one end by a base plate and open at the other end to form a first cavity; the piezoelectric plate being fixed on the outside face of the plate base and the first hood cavity being open freely towards the middle outside in which the hood is immersed.
- the cross section of the cover is circular.
- the cross section of the cover is elliptical.
- the first cavity is filled at least partially by an adaptation material whose characteristics are different from those of the external environment in which the transducer is immersed.
- it further comprises a body comprising a second interior cavity closed by the cover so as to be isolated from the outside environment with the piezoelectric blade enclosed in the second interior cavity and the first cavity being turned outward.
- it comprises two sets cover / piezoelectric blade fixed head to tail.
- the cover forms the front face of a transducer of known type "tonpilz".
- the device according to the invention shown in longitudinal section in Figure 1 presents a structure which we can easily see that it is in complete break with the technology currently used, which is based on the "tonpilz" structure mentioned above.
- This device comprises as active element a plate of ceramic 101, which is preferably unique and which includes classic a pair of electrodes 102 and 103 each fixed on one of main faces of this plate. Preferably these electrodes are consisting of silvering by deposit. These electrodes are connected by wire 104 to an amplifier which delivers an excitation signal at the frequency desired. Given the structure of the device, it would be entirely possible to limit these supply wires to a single wire connected to the electrode 103 which is isolated. The other electrode, which is connected to the ground of the device, would then powered through this mass.
- the electrode 102 is fixed on the flat underside of a part 105 in the shape of a cylinder closed at its base and open at its end higher. We will call this part "hood”.
- the vibrations of the ceramic plate 101 are transmitted to the hood, the structure of which vibrates according to two modes of resonance key.
- the critical couplings of these two modes of resonance then make it possible to obtain a large bandwidth, corresponding to about 60% of the center frequency.
- the first mode of resonance is the natural mode of bending of the underside of the cover under the action of ceramic working in mode 3.1.
- the second mode comes from the action of the fluid filling the cavity inner 106 formed by the cover which is directly immersed in the middle outside, sea water in general. Indeed in this cavity the speed of sound waves is lower than in free space because the walls of the hood are not infinitely rigid. We then obtain a resonance mode corresponding to a ⁇ / 4 blade. The more the rigidity of the walls increases, the more the high frequency increases. The higher the height of the walls, the more low frequency decreases.
- the invention also provides that the lower wall 107 of the cover has a central excess thickness such that the cross section of this blade corresponds to the shape of a beam of equal resistance.
- the constraints applied by the pressure of the external fluid on the ceramic blade 101 via from the bottom 107 of the hood are uniformly distributed over this blade, which prevents it from bending under the action of this pressure and therefore eliminates the risk of the ceramic blade breaking under the effect of pressure.
- This shape increases the radiation area by a factor of 2 in the fluid. All in all, the ceramic is held better, better mechanical and acoustic performance and a lower threshold cavitation compared to a standard bending transducer.
- the transducer is completed by a body, or "tape", 107 which has the shape of a cylinder concentric with the cover 105 and which has at its upper part a cavity 108 into which the cover is inserted.
- This cover is fixed by its lateral face external to the body by welding, for example at the upper end of this body.
- This attachment 109 is oversized at the interior of the cavity 108 so as to provide a free space 110 between the internal wall of the cavity 108 and the external wall of the cover 105, to avoid disturb the vibrational regime.
- the power cables 104 come out of the body by an axial channel 111 which opens on one side into the cavity 108 and on the other hand to the lower surface of the body.
- This axial channel is blocked by means not shown, a screw cap for example, which allow both the connection of the wires 104 and the closure sealing the cavity 108/111. In this way, this cavity remains filled of air without the external water entering it, which allows the blade to ceramic 101 to vibrate and also short circuit the electrodes 101.
- FIG. 2 is shown.
- an emission sensitivity curve for such a transducer whose cover 105 has an outside diameter of 115 millimeters with a thickness side walls of 4 millimeters, and a total height of 46 millimeters with a central thickness of the underside of the cover equal to 14 millimeters.
- this curve the widening of the band frequency.
- this frequency band is shifted towards the bass frequencies for a dimensioning which would correspond for a classic "tonpilz" type transducer at an emission frequency significantly higher.
- the invention also proposes to carry out the cover 105 in the form of a cylinder with an elliptical cross section instead of circular. This then gives two distinct resonances at the level of the cavity 106, in addition to the resonance of the ceramic plate 101. From this way the bandwidth is further increased.
- cover 105 / blade assembly ceramic 101 by itself, without adding the body 107, but while ensuring insulation of the electrodes 102 and 103 by an appropriate coating, a waterproof paint layer for example.
- This transducer which is then type known without the Anglo-Saxon expression "free flooded”, can be used without any immersion limit but with a lower yield, however due to the action of water on the back of the ceramic.
- height of the cavity will advantageously be chosen to be equal to the half the central wavelength of the transducer, in order to obtain a good adaptation by rephasing between the waves emitted at the front and those which in this case are emitted at the rear.
- the invention also proposes, as a variant, to fill the cavity cover 105, possibly over a height which is not equal to that of the cover, with an adaptation material whose characteristics acoustics, especially the speed of sound propagation, are different of those of water. This allows to modify the response curve, by example to make it flatter or to widen it even more.
- FIG. 3 Another variant, represented in FIG. 3, consists in using two hood / ceramic assemblies, one 105/101 and the other 205/201, fixed head to tail on a cover 117 having the shape of a cylinder open from both sides.
- the connection wires 114 to the two ceramic blades then exit by a connector 211 fixed to the side wall of the body 117.
- Such a arrangement makes it possible to obtain a transducer having a radiation of dipolar type, characterized by significant rejection along its axis longitudinal.
- an extension of the invention consists in fitting out the pavilion emission of a known transducer of the "tonpilz” type, so that it takes the form of the cover 105.
- this advantage comes at the cost of increased footprint and return known problems of tightness of the "tonpilz” system since it is then necessary to maintain the freedom of movement of the flag of the "tonpilz" by relation to the body of it.
- the invention allows, compared to the technology used currently, to simultaneously obtain a widening of the band frequency transmitted, an offset of this band towards low frequencies without modifying the size of the device, an improvement in sealing the front panel, and reducing the cost of the device by decrease in the number of parts used to make it.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
- la figure 1, une vue en coupe d'un transducteur selon l'invention ;
- la figure 2, un diagramme fréquence/amplitude de l'émission d'un tel transducteur ; et
- la figure 3, une vue en coupe longitudinale d'une variante de l'invention, dans laquelle le transducteur est double.
Claims (7)
- Transducteur acoustique sous-marin à large bande, comprenant au moins une lame piézoélectrique (101) fonctionnant en flexion, caractérisé en ce qu'il comprend en outre un capot cylindrique (105) fermé à une extrémité par une plaque de base (107) et ouvert à l'autre extrémité pour former une première cavité (106) ; la lame piézoélectrique (101) étant fixée sur la face extérieure de la plaque de base et la première cavité (106) du capot étant ouverte librement vers le milieu extérieur dans lequel le capot est plongé.
- Transducteur selon la revendication 1, caractérisé en ce que la section droite du capot (105) est circulaire.
- Transducteur selon la revendication 1, caractérisé en ce que la section droite du capot (105) est elliptique.
- Transducteur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la première cavité (106) est remplie au moins partiellement par un matériau d'adaptation dont les caractéristiques acoustiques sont différentes de celles du milieu extérieur dans lequel le transducteur est plongé.
- Transducteur selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comprend en outre un corps (107) comportant une deuxième cavité intérieure (108) fermée par le capot (105) de manière à être isolée du milieu extérieur avec la lame piézoélectrique (101) enfermée dans la deuxième cavité intérieure (108) et la première cavité (106) étant tournée vers l'extérieur.
- Transducteur selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il comprend deux ensembles capot/lame piézoélectrique (105, 101, 205, 201) fixés ensemble tête-bêche.
- Transducteur selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le capot (105) forme la face avant d'un transducteur de type connu "tonpilz".
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9913215 | 1999-10-22 | ||
FR9913215A FR2800229B1 (fr) | 1999-10-22 | 1999-10-22 | Transducteur acoustique sous-marin a large bande |
PCT/FR2000/002815 WO2001029820A1 (fr) | 1999-10-22 | 2000-10-10 | Transducteur acoustique sous-marin a large bande |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1222653A1 EP1222653A1 (fr) | 2002-07-17 |
EP1222653B1 true EP1222653B1 (fr) | 2003-09-17 |
Family
ID=9551245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00967997A Expired - Lifetime EP1222653B1 (fr) | 1999-10-22 | 2000-10-10 | Transducteur acoustique sous-marin a large bande |
Country Status (5)
Country | Link |
---|---|
US (1) | US6617765B1 (fr) |
EP (1) | EP1222653B1 (fr) |
DE (1) | DE60005382T2 (fr) |
FR (1) | FR2800229B1 (fr) |
WO (1) | WO2001029820A1 (fr) |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7320457B2 (en) * | 1997-02-07 | 2008-01-22 | Sri International | Electroactive polymer devices for controlling fluid flow |
US7537197B2 (en) * | 1999-07-20 | 2009-05-26 | Sri International | Electroactive polymer devices for controlling fluid flow |
US7467945B2 (en) * | 2004-09-10 | 2008-12-23 | S.C. Johnson & Son, Inc. | Candle assembly and fuel element therefor |
AU2003225913A1 (en) * | 2002-03-18 | 2003-10-08 | Roy David Kornbluh | Electroactive polymer devices for moving fluid |
CN1744769B (zh) * | 2004-08-31 | 2010-05-05 | 中国科学院声学研究所 | 电动式水中音乐体感振动发射换能器 |
US7122941B2 (en) * | 2004-09-01 | 2006-10-17 | Impulse Devices, Inc. | Acoustic driver assembly with recessed head mass contact surface |
US7122943B2 (en) * | 2004-09-01 | 2006-10-17 | Impulse Devices, Inc. | Acoustic driver assembly with restricted contact area |
US7126258B2 (en) * | 2004-09-01 | 2006-10-24 | Impulse Devices, Inc. | Acoustic driver assembly with recessed head mass contact surface |
US7218033B2 (en) * | 2004-09-01 | 2007-05-15 | Impulse Devices, Inc. | Acoustic driver assembly with restricted contact area |
US7425791B2 (en) * | 2004-09-01 | 2008-09-16 | Impulse Devices, Inc. | Acoustic driver assembly with recessed head mass contact surface |
US7425792B2 (en) * | 2004-09-01 | 2008-09-16 | Impulse Devices, Inc. | Acoustic driver assembly with restricted contact area |
US7224103B2 (en) | 2004-09-01 | 2007-05-29 | Impulse Devices, Inc. | Acoustic driver assembly with recessed head mass contact surface |
US20070035208A1 (en) * | 2004-09-01 | 2007-02-15 | Impulse Devices Inc. | Acoustic driver assembly with restricted contact area |
US7218034B2 (en) * | 2004-09-01 | 2007-05-15 | Impulse Devices, Inc. | Acoustic driver assembly with restricted contact area |
US7126256B2 (en) * | 2004-09-01 | 2006-10-24 | Impulse Devices, Inc. | Acoustic driver assembly with recessed head mass contact surface |
US20060043840A1 (en) * | 2004-09-01 | 2006-03-02 | Impulse Devices Inc. | Acoustic driver assembly with restricted contact area |
US6958569B1 (en) | 2004-09-01 | 2005-10-25 | Impulse Devices, Inc. | Acoustic driver assembly for a spherical cavitation chamber |
US20060043835A1 (en) * | 2004-09-01 | 2006-03-02 | Impulse Devices Inc. | Acoustic driver assembly with restricted contact area |
US20060043838A1 (en) * | 2004-09-01 | 2006-03-02 | Impulse Devices, Inc. | Acoustic driver assembly with restricted contact area |
EP1886363A2 (fr) * | 2005-05-31 | 2008-02-13 | Unison Products | Conception piezo optimisee pour transducteur mecanique- acoustique |
US20070103034A1 (en) * | 2005-11-04 | 2007-05-10 | Impulse Devices Inc. | Acoustic driver assembly with increased head mass displacement amplitude |
US7510322B2 (en) * | 2005-12-16 | 2009-03-31 | Impulse Devices, Inc. | High pressure cavitation chamber with dual internal reflectors |
US20070138911A1 (en) * | 2005-12-16 | 2007-06-21 | Impulse Devices Inc. | Tunable acoustic driver and cavitation chamber assembly |
US7461965B2 (en) * | 2005-12-16 | 2008-12-09 | Impulse Devices, Inc. | Cavitation chamber with flexibly mounted reflector |
EP2076061B1 (fr) * | 2006-11-27 | 2019-01-30 | Murata Manufacturing Co. Ltd. | Transducteur à ultrasons |
US7952261B2 (en) | 2007-06-29 | 2011-05-31 | Bayer Materialscience Ag | Electroactive polymer transducers for sensory feedback applications |
WO2009067669A1 (fr) * | 2007-11-21 | 2009-05-28 | Emo Labs, Inc.. | Haut-parleur sans fil |
US8189851B2 (en) | 2009-03-06 | 2012-05-29 | Emo Labs, Inc. | Optically clear diaphragm for an acoustic transducer and method for making same |
EP2239793A1 (fr) | 2009-04-11 | 2010-10-13 | Bayer MaterialScience AG | Montage de film polymère électrique commutable et son utilisation |
DE102010027780A1 (de) | 2010-04-15 | 2011-10-20 | Robert Bosch Gmbh | Verfahren zum Ansteuern eines Ultraschallsensors und Ultraschallsensor |
SG193003A1 (en) | 2011-03-01 | 2013-10-30 | Bayer Ip Gmbh | Automated manufacturing processes for producing deformable polymer devices and films |
US9195058B2 (en) | 2011-03-22 | 2015-11-24 | Parker-Hannifin Corporation | Electroactive polymer actuator lenticular system |
CN102568464B (zh) * | 2011-12-31 | 2013-08-21 | 北京长城电子装备有限责任公司 | 一种深水用水声换能器 |
US9876160B2 (en) | 2012-03-21 | 2018-01-23 | Parker-Hannifin Corporation | Roll-to-roll manufacturing processes for producing self-healing electroactive polymer devices |
WO2013192143A1 (fr) | 2012-06-18 | 2013-12-27 | Bayer Intellectual Property Gmbh | Cadre d'étirement pour processus d'étirement |
WO2014066576A1 (fr) | 2012-10-24 | 2014-05-01 | Bayer Intellectual Property Gmbh | Diode polymère |
US9035537B2 (en) | 2013-03-15 | 2015-05-19 | Rgw Innovations, Llc | Cost effective broadband transducer assembly and method of use |
JP2016516358A (ja) | 2013-03-15 | 2016-06-02 | イモ ラブス, インコーポレイテッド | 屈曲制限部材を有する音響変換器 |
CN103646642B (zh) * | 2013-11-29 | 2016-03-09 | 哈尔滨工程大学 | 多液腔低频宽带水声换能器 |
FR3015785B1 (fr) * | 2013-12-20 | 2015-12-25 | Thales Sa | Antenne omnidirectionnelle compacte pour sonar trempe |
USD733678S1 (en) | 2013-12-27 | 2015-07-07 | Emo Labs, Inc. | Audio speaker |
USD741835S1 (en) | 2013-12-27 | 2015-10-27 | Emo Labs, Inc. | Speaker |
USD748072S1 (en) | 2014-03-14 | 2016-01-26 | Emo Labs, Inc. | Sound bar audio speaker |
US10001574B2 (en) * | 2015-02-24 | 2018-06-19 | Amphenol (Maryland), Inc. | Hermetically sealed hydrophones with very low acceleration sensitivity |
GB2557345B (en) * | 2016-12-08 | 2021-10-13 | Bae Systems Plc | MIMO communication system and data link |
US11079506B2 (en) | 2016-12-16 | 2021-08-03 | Pgs Geophysical As | Multicomponent streamer |
US11678112B2 (en) | 2020-04-30 | 2023-06-13 | Massachusetts Institute Of Technology | Underwater transducer for wide-band communication |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2700738A (en) * | 1951-05-05 | 1955-01-25 | Ibm | Delay-line end cell |
US3271596A (en) * | 1963-11-12 | 1966-09-06 | Boeing Co | Electromechanical transducers |
US3311761A (en) * | 1963-12-26 | 1967-03-28 | Schloss Fred | Transducer mounting |
BE757591A (fr) | 1969-11-25 | 1971-03-16 | Thomson Csf | Perfectionnements aux domes de systemes sonars et procede de leur fabrication |
FR2290812A1 (fr) | 1974-11-08 | 1976-06-04 | Thomson Csf | Transducteur electroacoustique pour immersion profonde |
US6275448B1 (en) * | 1977-12-12 | 2001-08-14 | L3 Communication | Pressure-compensated acceleration-insensitive hydrophone |
FR2431419A1 (fr) | 1978-07-18 | 1980-02-15 | Thomson Csf | Bouee aeroportee largable |
FR2450193A1 (fr) | 1979-02-27 | 1980-09-26 | Thomson Csf | Bouee aeroportee largable a declenchement inertiel |
FR2464179A2 (fr) | 1979-08-28 | 1981-03-06 | Thomson Csf | Bouee aeroportee largable |
US4517664A (en) * | 1980-03-31 | 1985-05-14 | Teledyne Exploration Company | Seismic apparatus |
FR2496379A1 (fr) * | 1980-12-16 | 1982-06-18 | Tech Radioelect Electro Fs | Transducteur electroacoustique de puissance pour immersion profonde |
AU544464B2 (en) * | 1982-12-27 | 1985-05-30 | Tokyo Shibaura Denki Kabushiki Kaisha | Ultrasonic transducer |
US4482835A (en) * | 1983-05-09 | 1984-11-13 | Systems Research Laboratories, Inc. | Multiphase backing materials for piezoelectric broadband transducers |
JPS6025959B2 (ja) * | 1984-05-21 | 1985-06-21 | 松下電器産業株式会社 | 超音波セラミツクマイクロホン |
DE3441684A1 (de) * | 1984-11-15 | 1986-05-15 | SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen | Elektroakustischer wandler |
FR2622333B1 (fr) | 1987-10-27 | 1990-01-26 | Thomson Csf | Revetement anechoique pour ondes acoustiques |
US4926397A (en) * | 1989-11-13 | 1990-05-15 | Teledyne Exploration | Depth alarm for a seismic sensor |
FR2656971B1 (fr) | 1990-01-05 | 1992-09-04 | Thomson Csf | Hydrophone basse frequence et antenne sonar comportant de tels hydrophones. |
JP2920776B2 (ja) * | 1990-04-13 | 1999-07-19 | 東芝セラミックス株式会社 | 超音波プローブ |
FR2672179B1 (fr) | 1991-01-25 | 1993-04-16 | Thomson Csf | Transducteur acoustique flextenseur pour immersion profonde. |
FR2725684A1 (fr) | 1994-10-18 | 1996-04-19 | Thomson Csf | Bouee aeroportee largable |
DE59510158D1 (de) * | 1995-09-28 | 2002-05-16 | Endress Hauser Gmbh Co | Ultraschallwandler |
FR2764160B1 (fr) | 1997-05-27 | 1999-08-27 | Thomson Marconi Sonar Sas | Transducteur electrodynamique pour acoustique sous-marine |
FR2776161B1 (fr) | 1998-03-10 | 2000-05-26 | Thomson Marconi Sonar Sas | Antenne d'emission acoustique annulaire demontable |
-
1999
- 1999-10-22 FR FR9913215A patent/FR2800229B1/fr not_active Expired - Lifetime
-
2000
- 2000-10-10 EP EP00967997A patent/EP1222653B1/fr not_active Expired - Lifetime
- 2000-10-10 WO PCT/FR2000/002815 patent/WO2001029820A1/fr active IP Right Grant
- 2000-10-10 DE DE60005382T patent/DE60005382T2/de not_active Expired - Lifetime
- 2000-10-10 US US10/110,130 patent/US6617765B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE60005382D1 (de) | 2003-10-23 |
EP1222653A1 (fr) | 2002-07-17 |
FR2800229A1 (fr) | 2001-04-27 |
FR2800229B1 (fr) | 2002-04-05 |
DE60005382T2 (de) | 2004-07-08 |
WO2001029820A1 (fr) | 2001-04-26 |
US6617765B1 (en) | 2003-09-09 |
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