WO2011035747A1 - Electroacoustic transducer - Google Patents
Electroacoustic transducer Download PDFInfo
- Publication number
- WO2011035747A1 WO2011035747A1 PCT/DE2009/001335 DE2009001335W WO2011035747A1 WO 2011035747 A1 WO2011035747 A1 WO 2011035747A1 DE 2009001335 W DE2009001335 W DE 2009001335W WO 2011035747 A1 WO2011035747 A1 WO 2011035747A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrodes
- electroacoustic transducer
- composite
- transducer according
- voltage
- Prior art date
Links
- 239000002131 composite material Substances 0.000 claims abstract description 45
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000012777 electrically insulating material Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000000284 resting effect Effects 0.000 claims 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 description 1
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 description 1
- 241000256259 Noctuidae Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
-
- 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
- B06B1/0644—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 a single piezoelectric element
Definitions
- the invention relates to an electroacoustic transducer according to the preamble of claim 1.
- Streamer (DE 10 2004 038 034 A1), has a flexible, sound transparent and oil - or gel-filled tube and in the tube in the longitudinal direction spaced from each other, arranged on electroacoustic transmitting transducer, which are supported on the tube wall.
- Each transmit transducer has an annular body, which is composed of a plurality of piezoceramic ring segments and outside carries a ring segments fixing GFRP wrapping. Each ring segment is covered on its radially oriented side surface with an electrode.
- axially aligned electrode terminals are led out in the circumferential direction of the ring body alternately on one and the other end face of the annular body and connected there.
- the ring body "breathes" in the radial direction, ie it expands and contracts, .patii the size of the "breathing”, ie the expansion and shrinkage of the ring body, by the size of the AC voltage and the frequency of "breathing" through the frequency of the AC voltage is determined.
- the expansion and contraction of the toroid becomes transferred directly to the tube wall and coupled as sound pressure in the water.
- the invention has for its object to provide an electroacoustic transducer in ring form for underwater use with a sufficiently high acoustic performance, which is characterized by small dimensions and low weight.
- the electroacoustic transducer according to the invention has the advantage that, with the very thin composite modules, each of which consists only of an epoxide-bonded layer of extremely cross-section small piezoceramic fibers with thin electrodes lying on both sides, a small-dimension converter operating in the low-frequency range participates a maximum diameter of eg 80 mm and an axial thickness of e.g. 30 mm, which offers optimum properties for use in underwater towed antennas.
- the acoustic power of the transducer is adjustable by the number of radially abutting, circular composite modules. Due to the small dimensions of the transducer with respect to the wavelength of the sound waves emitted by it, the transducer has an omnidirectional radiation behavior.
- the transducer is light in weight, which makes it much easier to trim towed antennas equipped with such transducers.
- electrically insulating material such as polyimide film
- the electrodes of each composite module with a DC voltage are so occupied that at the adjacent electrodes on a film alternately a high and a low DC potential and on the piezoceramic fibers each other directly opposite electrodes on the two films in each case the same DC potential is, and an alternating voltage can be applied to the electrodes.
- the composite modules can on the one hand operated with a higher DC voltage and on the other hand, a larger piezoelectric effect and thus a larger stroke of the ring body in the radial direction, based on the switched AC voltage can be achieved.
- the larger DC voltage and the AC voltage to be applied which must always be smaller than the applied DC voltage, chosen larger and thus the acoustic power of the converter can be increased.
- the composite modules are laminated on each other or glued to each other, wherein they advantageously result in a self-rigid ring body with low weight.
- the annular body is seated on an elastic support, which is preferably made of reinforced with glass or carbon fibers plastic material, and preferably designed as a tube.
- an elastic support which is preferably made of reinforced with glass or carbon fibers plastic material, and preferably designed as a tube.
- the converter can be realized with a smaller number of composite modules arranged on one another, with which an inherent rigidity of the annular body can not be achieved.
- the already inherently rigid ring body can be placed on such a support to increase the compressive strength of the transducer for underwater use at greater depths.
- the transducer described has advantageous properties for use in underwater towed antennas.
- the converter is inserted into a hose, which is advantageously widened in diameter, of the underwater towed antenna, so that the annular body lies with its circumference against the hose wall. After returning the diameter extension then the tube wall is frictionally on the ring body and fixes this safely in the predetermined position.
- the diameter extension is preferably realized by overpressure generated in the hose.
- the hollow ring body or the hollow carrier makes it possible to lay the underwing cables trailing the hose pulling cables and connecting cables for the converter centrally in the hose.
- 1 is a front view of an electroacoustic transducer in perspective view
- 2 is a plan view of an electroacoustic transducer according to a second embodiment
- Fig. 3 in part a partially cut hose a
- FIG. 4 is a fragmentary enlarged view of two superimposed composite modules in the electrical converter of FIG. 1 or 2, in exploded view,
- FIG. 5 is a fragmentary perspective view of a composite layer with embedded in an electrically insulating material, cross-section small piezoceramic fibers in the composite modules of FIG. 4,
- Fig. 6 is a same view as in Fig. 4 with modified composite modules.
- electro-acoustic transducer 10 is preferably operated as a transmitting transducer in an underwater towed antenna, as illustrated in Fig. 3 fragmentary.
- the transducer 10 has an annular body 11 with entrapped, piezoelectric material and this contacting electrodes and is based on its integration into the underwater towed antenna with the circumference of its annular body frictionally against the hose wall 121 of a hose 12 from.
- To realize an elongate towed antenna several such transducers 10 are arranged in the tube 12 at an axial distance one behind the other.
- the pull cable 13, which may also be a flexible pipe receiving the connection lines, is attached by means of spacers 14 the hose wall 121 supported.
- the tube 12 is closed at the end and filled with an oil 15 or a gel.
- the annular body 11 of the electroacoustic transducer 10 is composed of a plurality of superimposed in the radial direction of the annular body 11, annular flat composite modules 16, wherein the superimposed composite modules 16 are laminated or glued to each other, so that after a certain number of superimposed composite - Module 16 results in an inherent rigidity of the electro-acoustic transducer 10.
- the innermost, annular composite module 16 is laminated or glued onto an elastic carrier 17 and the other composite modules 16 are applied thereto by lamination or gluing. This has the advantage that with a smaller number of composite modules 16, a pressure-stable transducer 10 for underwater use can be realized.
- FIG. 1 In the embodiment of FIG.
- the elastic support 17 is designed as a hollow ring 18 made of plastic with preferably embedded glass or carbon fibers, so that in the use of the transducer 10 in the sketched in Fig. 3 underwater antenna still pulling cable 13 and connecting cables centrally the series of the transducers 10 can be passed.
- Each of the annular superimposed in the radial direction, annular, extending over approximately 360 °, flat composite modules 16 has axially spaced apart, extending in the circumferential direction of the annular body 11 piezoceramic fibers 19 and spaced from each other extending electrodes 20, 21 which the piezoceramic fibers 19 contact on the radially remote from each other long side.
- Fig. 4 the development of two superimposed in the ring body 11 composite modules 16 is fragmentary and outlined in exploded view.
- Each composite module 16 has a width b corresponding to the width of the ring body 11 and an axial length of approximately n * d, where d is the mean diameter of the ring body 11.
- the electrodes 20, 21 are part of an electrode structure 22, 23, wherein in each case an electrode structure 22 on a flexible film 24 or 25 of electrically insulating material, for. B. on a polyimide film, applied, for example, printed.
- the elongated finger-like electrodes 20, 21 are alternately juxtaposed and spaced apart from each other in the longitudinal direction of the film 24, 25, respectively, the electrodes 20 being at their one end across a longitudinal direction of the film 24, 25, respectively extending conductor track 26 and the electrodes 21 are connected at their one end by a likewise extending in the longitudinal direction of the film 24 or 25 extending conductor track 27, so that on each film 24 and 25, two comb-like structural parts 31, 32 are present, which one inside the other to grab.
- the electrode structures 22, 23 are arranged on the mutually facing film surfaces of the films 24, 25.
- the electrode structure 22 with its electrodes 20, 21 and its interconnects 26, 27 is shown in dashed lines in FIG. 4.
- Between the two electrode structures 22, 23 extend in the longitudinal direction of the films 24, 25 extending piezoceramic fibers 19, which are aligned parallel to each other.
- the elongated piezoceramic fibers 19 have, for example, a square or rectangular cross-section and the spaces 29 between the piezoceramic fibers 19 are provided with an electrically insulating material, for. B. with a polymer or epoxy, filled (which is not shown in Fig.
- the two films 24, 25 are mirror-inverted with mutually facing electrode structures 22, 23 placed on the piezoceramic fibers 19, wherein only the electrodes 20, 21 of the electrode structures 22, 23 (and not the conductor tracks 26, 27) the piezoceramic fibers 19 on their opposite longitudinal sides to contact.
- the two films 24, 25 are firmly connected to each other, so that the piezoceramic fibers 19 are encapsulated with the overlying electrode structures 22, 23 and thus protected against external influences.
- the composite modules 16 of the type described are known and For example, in EP 1 983 584 A2 and described there as "Piezoelectric Macro-Fiber Composite Actuator".
- a DC voltage is applied to each electrode structure 22, 23, wherein each of the structural part 31 is at a higher DC potential and the structural part 32 at a lower DC potential.
- the electrodes 20, 21 adjacent to one another on a film 24 and 25 are alternately acted upon by a high and a low DC potential and the electrodes 20 and 21, respectively directly opposite the piezoceramic fibers 19, on the two films 24, 25 with the same DC potential.
- the DC voltage is an AC voltage superimposed so that the former is not exceeded.
- the expansion and contraction of the annular body 11 transmits directly to the tube wall 121 of the tube 12 and is coupled as sound pressure in the water.
- FIG. 6 The perspective view in perspective and fragmentary shown in Fig. 6 composite modules 16, which lie directly above one another in the annular body 1 1, are constructed largely the same, so that the same components are provided with the same reference numerals. They differ from those described for Fig. 4 composite modules 16 characterized in that in the two electrode structures 22, 23 on the films 24, 25, the interconnects 26, 27 of the two structural parts 31, 32 connected to each other and to a terminal 33 (am upper film 24) and a terminal 34 (on the lower film 25) are laid. To the two terminals 33, 34, a DC voltage is superimposed with alternating voltage.
- the electrodes 20, 21 of the electrode structure 22 arranged on the one film 24 are subjected to a high DC voltage and the electrodes 20, 21 arranged on the other film 25 are applied to a low DC voltage potential or vice versa and to all the electrodes. 20, 21 an alternating voltage is superimposed.
- the annular body 11 will thereby perform a "breathing" in the radial direction, which are coupled as pressure waves in the surrounding medium.
- the amplitude of the "breathing" is significantly lower than in the ring body 11, which is realized with composite modules 16 as shown in FIG.
- the required DC voltage for the operation of the converter 10 is significantly lower.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2009352980A AU2009352980A1 (en) | 2009-09-22 | 2009-09-22 | Electroacoustic transducer |
PCT/DE2009/001335 WO2011035747A1 (en) | 2009-09-22 | 2009-09-22 | Electroacoustic transducer |
DE112009005267T DE112009005267A5 (en) | 2009-09-22 | 2009-09-22 | ELECTRIC ACOUSTIC CONVERTER |
EP09743838A EP2480913A1 (en) | 2009-09-22 | 2009-09-22 | Electroacoustic transducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2009/001335 WO2011035747A1 (en) | 2009-09-22 | 2009-09-22 | Electroacoustic transducer |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011035747A1 true WO2011035747A1 (en) | 2011-03-31 |
Family
ID=43640704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2009/001335 WO2011035747A1 (en) | 2009-09-22 | 2009-09-22 | Electroacoustic transducer |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2480913A1 (en) |
AU (1) | AU2009352980A1 (en) |
DE (1) | DE112009005267A5 (en) |
WO (1) | WO2011035747A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2516976A (en) * | 2013-08-09 | 2015-02-11 | Atlas Elektronik Uk Ltd | System for producing sound waves |
WO2016063126A1 (en) * | 2014-10-23 | 2016-04-28 | Cgg Services Sa | Methods and systems for improved active land streamers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3444424A1 (en) * | 1984-12-06 | 1991-11-07 | Krupp Gmbh | Wound filament-type transducer array - for multidirectional sonar antenna |
WO1999048621A2 (en) * | 1998-03-26 | 1999-09-30 | Exogen, Inc. | Arrays made from flexible transducer elements |
US6310427B1 (en) * | 2000-05-03 | 2001-10-30 | Bae Systems Aerospace Inc. | Connecting apparatus for electro-acoustic devices |
US6477111B1 (en) * | 1998-10-29 | 2002-11-05 | Schlumberger Technology Corporation | Method of making a marine seismic streamer |
DE102004038034A1 (en) * | 2004-08-05 | 2006-02-23 | Atlas Elektronik Gmbh | Electroacoustic transmitting antenna |
-
2009
- 2009-09-22 DE DE112009005267T patent/DE112009005267A5/en active Pending
- 2009-09-22 EP EP09743838A patent/EP2480913A1/en not_active Withdrawn
- 2009-09-22 AU AU2009352980A patent/AU2009352980A1/en not_active Abandoned
- 2009-09-22 WO PCT/DE2009/001335 patent/WO2011035747A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3444424A1 (en) * | 1984-12-06 | 1991-11-07 | Krupp Gmbh | Wound filament-type transducer array - for multidirectional sonar antenna |
WO1999048621A2 (en) * | 1998-03-26 | 1999-09-30 | Exogen, Inc. | Arrays made from flexible transducer elements |
US6477111B1 (en) * | 1998-10-29 | 2002-11-05 | Schlumberger Technology Corporation | Method of making a marine seismic streamer |
US6310427B1 (en) * | 2000-05-03 | 2001-10-30 | Bae Systems Aerospace Inc. | Connecting apparatus for electro-acoustic devices |
DE102004038034A1 (en) * | 2004-08-05 | 2006-02-23 | Atlas Elektronik Gmbh | Electroacoustic transmitting antenna |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2516976A (en) * | 2013-08-09 | 2015-02-11 | Atlas Elektronik Uk Ltd | System for producing sound waves |
GB2516976B (en) * | 2013-08-09 | 2016-10-12 | Atlas Elektronik Uk Ltd | System for producing sound waves |
US10183313B2 (en) | 2013-08-09 | 2019-01-22 | Atlas Elektronik Uk Ltd | System for producing sound waves |
WO2016063126A1 (en) * | 2014-10-23 | 2016-04-28 | Cgg Services Sa | Methods and systems for improved active land streamers |
Also Published As
Publication number | Publication date |
---|---|
DE112009005267A5 (en) | 2012-11-15 |
EP2480913A1 (en) | 2012-08-01 |
AU2009352980A1 (en) | 2012-04-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102013201928A1 (en) | Electroacoustic transducer for producing acoustic waves e.g. shock waves in medical field, has piezoelectric elements whose one side is provided with electrode which is electrical insulated in relation to piezoelectric elements | |
DE3443869C2 (en) | ||
DE102015100442A1 (en) | Active acoustic black hole for vibration and noise reduction | |
EP1282921A1 (en) | Piezoelectric bending transducer and use thereof | |
EP2480345B1 (en) | Electroacoustic transducer, in particular transmitting transducer | |
DE2606951A1 (en) | PIEZOELECTRIC CONVERTER | |
WO2011035747A1 (en) | Electroacoustic transducer | |
DE102011121006B4 (en) | Electroacoustic transducer | |
WO2011035744A1 (en) | Electroacoustic transducer | |
DE3221145A1 (en) | Self-adhesive piezoelectric transducer and device for using the transducer | |
EP1624445B1 (en) | Electroacoustic sound transducer | |
DE3231117A1 (en) | PIEZOELECTRIC COUPLER, ESPECIALLY ELECTROMECHANICAL IGNITION COUPLER | |
DE102012105647A1 (en) | Electrical component for use as e.g. capacitor, has coil including electrical conductor whose longitudinal contact end is conductively connected with electrode, where longitudinal contact ends lie on side of piezoelectric elements | |
EP0472085B1 (en) | Ultrasound transducer | |
CH704284B1 (en) | Piezoelectric shock wave source. | |
EP3257090B1 (en) | Piezoelectric generator, pushbutton, radio module and method for producing a piezoelectric generator | |
EP1724849A2 (en) | Piezoelectric element | |
DE4130796A1 (en) | ELECTRICALLY DRIVABLE SHOCK WAVE SOURCE | |
DE3419256A1 (en) | ELECTRIC-ACOUSTIC CONVERTER DEVICE | |
EP2875844A1 (en) | Implantable electrode arrangement, in particular for cardiological devices, such as cardiac pacemakers | |
EP2748922B1 (en) | Energy transmitting unit | |
DE102009049487B4 (en) | Electroacoustic transducer | |
EP3542405B1 (en) | Piezoelectric transmission and/or reception device, vibration sensor comprising a piezoelectric transmission and/or reception device of said type, and method for manufacturing a piezoelectric transmission and/or reception device | |
EP3036778B1 (en) | Component for electrically contacting a piezo stack, a piezo stack, and method for producing same | |
DE102017117636A1 (en) | Plug-in implementation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09743838 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 569/KOLNP/2012 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009743838 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009352980 Country of ref document: AU |
|
ENP | Entry into the national phase |
Ref document number: 2009352980 Country of ref document: AU Date of ref document: 20090922 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120090052673 Country of ref document: DE Ref document number: 112009005267 Country of ref document: DE |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: R225 Ref document number: 112009005267 Country of ref document: DE Effective date: 20121115 |