EP0462037A1 - Elektroakustischer Unterwasserwandler - Google Patents

Elektroakustischer Unterwasserwandler Download PDF

Info

Publication number
EP0462037A1
EP0462037A1 EP91430011A EP91430011A EP0462037A1 EP 0462037 A1 EP0462037 A1 EP 0462037A1 EP 91430011 A EP91430011 A EP 91430011A EP 91430011 A EP91430011 A EP 91430011A EP 0462037 A1 EP0462037 A1 EP 0462037A1
Authority
EP
European Patent Office
Prior art keywords
transducer
transducer elements
electro
acoustic
stack
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.)
Granted
Application number
EP91430011A
Other languages
English (en)
French (fr)
Other versions
EP0462037B1 (de
Inventor
Gilles A . Grosso
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0462037A1 publication Critical patent/EP0462037A1/de
Application granted granted Critical
Publication of EP0462037B1 publication Critical patent/EP0462037B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G10K9/121—Flextensional transducers
    • 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'
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49005—Acoustic transducer

Definitions

  • the present invention relates to a submerged electro-acoustic transducer and to a method of manufacturing this electro-acoustic transducer.
  • Electro-acoustic transducers are commonly used, in particular to emit signals intended for communications and underwater detection.
  • the most commonly used electro-acoustic transducers include a motor, or active part, which generally consists of a stack of piezoelectric ceramic alternating with electrodes, the assembly forming a cylinder of elongated shape; under the action of a tension applied to ceramics, they deform; the ceramics are arranged and wired in such a way that their deformations are added, which means that longitudinal contraction and expansion movements of the stack of piezoelectric ceramics are obtained.
  • This stack is linked at one of its two longitudinal ends to a generally metallic support piece, serving as a support, often called a counter-support piece or counter-mass, which is kept substantially stationary relative to the transducer housing; the stack is linked at its other end to another mass, sometimes called the pavilion, which vibrates along the longitudinal axis of the stack, due to the movements of the latter, resulting from the tension applied to the ceramics.
  • a generally metallic support piece serving as a support, often called a counter-support piece or counter-mass, which is kept substantially stationary relative to the transducer housing
  • the stack is linked at its other end to another mass, sometimes called the pavilion, which vibrates along the longitudinal axis of the stack, due to the movements of the latter, resulting from the tension applied to the ceramics.
  • This flag is in contact with the desired propagation medium, generally water, in general by means of an elastic coating which seals the transmitter.
  • the electro-acoustic transducers of the "TONPILZ" type comprise the basic mechanical assembly, briefly described above, which includes a counter-mass fixed in a cylindrical case by means of suspensions limiting the movements of the sealed case with respect to this counter-mass, a stack of ceramics piezoelectric which vibrates a pavilion.
  • the stack is prestressed axially along its longitudinal axis, by means generally consisting of a rod screwed into the roof, which passes through the stack, which is locked in the counter-mass by a nut and which is tensioned.
  • JANUS type electro-acoustic transducers correspond substantially to two "TONPILZ” type electro-acoustic transducers, having a common counter-mass and whose stacks vibrate in phase opposition.
  • Electro-acoustic transducers of the "FLEXTENSIONAL” type use a principle of prestressing and diffusion of vibrations in the somewhat different propagation medium: in this type of electro-acoustic transducers, for example the “FLEXTENSIONAL” of class 4, the housing consists of a shell, generally made of epoxy glass composite, of cylindrical shape with elliptical section; this shell of elliptical section is, due to its elasticity, capable of flattening and rounding; in this shell, one or more pairs of stacks of piezoelectric ceramics are placed symmetrically with respect to a central core extending along the axis of the cylindrical shell, which are supported at one end on metal inserts which extend parallel to the central core, which metal inserts are supported inside the shell, in the vicinity of the end of the major axis of the ellipse defining the shell section.
  • the assembly consisting of the stacks and of the central counter-mass is introduced into the shell, the latter being prestressed by pinching, along the minor axis of the ellipse; when the assembly is in place inside the shell, the prestress is released, the major axis of the ellipse shortens, which prestresses the assembly, along the longitudinal axis of the stacks.
  • transducer elements consist of stacks of piezoelectric ceramics
  • these stacks of ceramics can, in certain cases, be replaced by magnetostrictive transducers; these transducers mainly comprise an elongated bar, constructed of a material generally mainly consisting of rare earths, which can vibrate by contracting and expanding along its axis longitudinal, under the effect of a magnetic field created by a coil which surrounds this bar.
  • the problem is therefore to provide electroacoustic transducers capable of being submerged, and their manufacturing process, allowing, without appreciable increase in the size of the electro-acoustic transducer, to provide increased power and / or capable of emitting relatively low frequencies.
  • an electro-acoustic transducer comprising in a housing, at least a first support part, or pavilion, and at least a second support part, or counter-mass, comprising at least two transducer elements of elongate shape along a longitudinal axis of said transducer, comprising at least one prestressing rod along said longitudinal axis, between said first and second bearing parts of said transducer elements, such that said transducer elements are arranged side by side side, and / or constitute coaxial cylinders having for axis said longitudinal axis, and can vibrate in phase, and such that it comprises at least one part or assembly, rigid, mobile intermediate, which is mounted or stacked, interposed between said transducer elements, mechanically in series with said transducer elements, so that said rigid intermediate piece can be prestressed by said rod, simultaneously with said transducer elements, and so that said rigid intermediate piece is capable of vibrating in phase with said transducer elements.
  • an electro-acoustic transducer comprises at least two transducer elements of elongated shape along a longitudinal axis, located between a first and a second support piece, prestressed along said longitudinal axis by a prestressing device, which tends to bring said support pieces closer together, which transducer elements each have two longitudinal, parallel, planar ends, which transducer elements are parallel, arranged side by side, and operate in phase, the assembly being contained in a housing, and only a first end of a first of said transducer elements is pressed against said first support piece, and only a first end of a second of said transducer elements is pressed against said second support piece, and said transducer comprises a rigid intermediate assembly which is sandwiched between said first and second transducer elements, which has two parallel faces which bear respectively on the second ends of said transducer elements and which is capable of being prestressed simultaneously with said first and second transducer elements, along said longitudinal axis by said prestressing device; each of said
  • said rigid intermediate assembly consists of a single rigid metal part, which can for example consist of a substantially cylindrical part, having an axis, parallel to said longitudinal axis, terminated at one end by a bottom which comprises one of said two parallel faces, which is supported on the second end of a first of said transducer elements, and at its other end, by an external flange which comprises the other of said two parallel faces, which rests on the second end of the second of said transducer elements.
  • said intermediate assembly comprises at least two rigid intermediate parts and at least one intermediate transducer element which is interposed between said two rigid intermediate parts and arranged mechanically in series therewith.
  • said prestressing device comprises one or more rods, which are fixed respectively by each of their two ends to each of said support pieces, or to an intermediate piece, in particular for application to "TONPILZ” and “JANUS” type assemblies, or else is constituted by said housing which is deformable, in particular for application to "FLEXTENSIONAL” type assemblies.
  • the cross sections of the active parts of said first and second transducer elements are substantially equal.
  • a solution to the problem posed is also to provide a method of manufacturing electro-acoustic transducers of the type comprising at least one transducer element of elongated shape, prestressed axially between two support pieces, characterized in that it is mounted between said pieces support, a first transducer element of elongated shape, having only a first end pressed against one of the two support pieces and a second transducer element of elongated shape, having only a first end pressed against the other support piece, which transducer elements are parallel and arranged side by side and operate in phase, interposed between these two transducer elements an intermediate piece which bears on the second ends of said transducer elements, and the two transducer elements and said intermediate piece which transmits longitudinal forces between the two transducer elements are axially prestressed between the two bearing pieces.
  • an electro-acoustic transducer in an electro-acoustic transducer according to the invention, to nest a second stack of ceramics in the form of a crown, which substantially surrounds the first stack, the two stacks having the same height and the active elements having substantially the same section, and an electro-acoustic transducer is thus obtained, the power of which will be substantially doubled compared to the known electro-acoustic transducers of the same size, which include that said first stack, since the volume of ceramics is doubled; at the same time, the equivalent length of the fictitious stack thus produced by the two nested stacks is doubled; consequently, the resonance frequency of the nested stack according to the invention, being approximately, inversely proportional to the square root of the length, will therefore be reduced by 40% compared to the known electro-acoustic transducer of the same size.
  • the assembly according to the invention can be used so as to nest more than two stacks, without appreciably increasing the size of the transducer, which makes it possible to achieve even higher performance in low power and / or frequency.
  • the electro-acoustic transducers according to the invention can be constructed both with piezoelectric ceramic transducers and with magnetostrictive bars.
  • FIG. 1 represents a cross-sectional view, on a reduced scale, of an embodiment of electro-acoustic transducer according to the invention, in an assembly of the "TONPILZ" type.
  • FIG. 2 represents a cross-sectional view, on a reduced scale, of another embodiment.
  • FIG. 3 represents a cross-sectional view, on a reduced scale, of an embodiment of electro-acoustic transducer according to the invention, in an assembly of the "JANUS" type.
  • FIG. 4 represents a cross-sectional view, on a reduced scale, of an embodiment of electro-acoustic transducer according to the invention, in an assembly of the "FLEXTENSIONAL" type.
  • FIG. 5 represents a cross-sectional view, on a reduced scale, of an embodiment of electro-acoustic transducer according to the invention, in an assembly of the "TONPILZ" type equipped with magnetostrictive transducer elements.
  • Figure 6 is a section on VI-VI of Figure 5.
  • FIG. 1 there is shown an electro-acoustic transducer according to the invention which is equipped with two transducer elements made of piezoelectric ceramics, in an assembly of the "TONPILZ" type.
  • the electro-acoustic transducer comprises in this type of mounting, a metal case 3, a counterweight 2, a horn 1, a prestressing rod 4 and a locking nut 5.
  • said housing 3 is closed at one end by a cover 13, in leaktight manner thanks to a seal 14.
  • Said counterweight which constitutes a support piece is mounted inside said housing by means of suspension devices 11 which bear on an internal shoulder of said housing, and by means of a suspension nut 12 ; said counterweight is kept centered in said housing by means of a centering ring 21;
  • An insulating disc 16 is mounted between said housing and said cover and delimits therewith a cavity 15 in which are housed the electrical wires which provide the connection between said connector and said transducer elements.
  • Said pavilion 1 which constitutes a second support piece is generally provided with an elastic coating 17, which can be vulcanized on said pavilion, and which is tightened on one end of said housing by clamps 20, thus ensuring the tightness of said transducer electro-acoustic.
  • said electro-acoustic transducer comprises a first stack of piezoelectric ceramics 6 in the form of discs alternating with electrodes 10, so as to constitute a first cylinder elongated along a longitudinal axis xx1, which in this mode of realization is confused with the axis of said electro-acoustic transducer.
  • Said prestressing rod is anchored in said pavilion by screwing one of its threaded ends into a tapped hole machined in said pavilion.
  • said electro-acoustic transducers comprises a second stack of piezoelectric ceramics 7 in the form of a crown alternating with electrodes 10, so as to constitute a second cylinder elongated along said axis xx1, and that said electro-acoustic transducer comprises a rigid intermediate piece 8, which is interposed between said first and second stacks of piezoelectric ceramics, said rigid intermediate piece 8 constituting said rigid intermediate assembly in this embodiment according to the invention.
  • said stacks are supported by one of their longitudinal ends on one of said support pieces (pavilion) and by their other longitudinal end on the other support piece (counterweight).
  • the transducer comprises a rigid intermediate assembly which is interposed between said first and second transducer elements, which comprises two parallel faces which bear respectively on the second ends of said transducer elements, and which is capable of being prestressed simultaneously with said first and second transducer elements, along said longitudinal axis (xx1) by said prestressing device.
  • the bearing face 1A of said pavilion 1 is opposite the first bearing face A of said first stack of ceramics 6, the second bearing face B of said first stack is facing the first bearing face 81, located on the bottom of said rigid intermediate piece 8, the second bearing face 82 located on the outer flange of said rigid intermediate piece 8 is facing the first face d 'support C of said second ceramic stack 7, the second support face D of said second ceramic stack 7 is opposite the support face 2A located on said counter-mass.
  • said prestressing rod is screwed and blocked on said pavilion, said first stack is made to slide around said rod which comes into contact with said pavilion, it is made to slide around said rod and around said first set of ceramics 6, said rigid intermediate piece which comes into contact with said first stack by its face 81, said second stack of ceramics 7 which comes into contact with said rod is made to slide around said rod and said rigid intermediate piece flange of said rigid intermediate part by its bearing face C, and finally sliding around said rod and said stack said counterweight which comes into contact by its face 2A with the face D of said second stack.
  • Said counterweight is then maintained and a pull is exerted on said rod, along its longitudinal axis and in a direction opposite to said pavilion; said traction therefore tends to bring said pavilion towards the counter-mass, and by means of said bearing faces opposite one another, said traction generates a compression preload along said axis xx1 of said first stack between said faces of support 1A, 81 respectively of said roof and of said rigid intermediate piece, said traction generates a compression preload along said axis xx1 of said second stack between said bearing faces 82, 2A respectively of said rigid intermediate piece and said counter-mass, said traction generates tensile preload along said axis xx1 of said intermediate piece rigid.
  • the assembly thus formed can then be mounted in said housing, and the final mounting operations carried out.
  • a clearance 9A, along said longitudinal axis xx1 must be provided between said counterweight 2 and said rigid intermediate piece 8.
  • a clearance 9B must be provided between said intermediate piece 8 and said pavilion 1, so that during vibrational movements of said pavilion and said rigid intermediate piece, under the action of the contraction and expansion movements of said first and second stacks, the contacts between said rigid intermediate piece, said flag and said counter-mass are avoided.
  • the value of these clearances will preferably be of the order of a few millimeters.
  • the rigidity in question is the longitudinal rigidity of said part or of said assembly, that is to say the rigidity with respect to tensile or compressive forces, along said longitudinal axis xx1; it is obvious that moreover the rigidity - we will then speak of stiffness - of said intermediate piece or of said intermediate assembly, along all other axes not parallel to xx1, must be sufficient in order to guarantee good mechanical strength; said longitudinal rigidity of said intermediate piece or of said intermediate assembly will in the majority of cases be significantly greater than the longitudinal rigidity of said first and second stacks.
  • said rod 4, said first stack, said intermediate piece and said second stack are preferably sheathed by insulating sleeves 40, substantially cylindrical; these sleeves serve in fact to provide electrical insulation between these different parts; they also make it possible to minimize the friction that could occur between these parts, due to their relative vibratory movements.
  • Passages are of course provided in these different parts which allow the routing of electrical wires (not shown) from said cavity 15 to said electrodes of said stacks.
  • said electro-acoustic transducer comprises clearances 22, 23 which correspond respectively to spaces formed between said housing and said roof on the one hand, and between said housing and said counter-mass of on the other hand, which spaces are generally filled with gas.
  • FIG 2 there is shown a cross section of another embodiment of an electro-acoustic transducer according to the invention, in an assembly of the "TONPILZ" type.
  • said pavilion is in contact by a bearing face 1A with a first end A of said first stack of ceramics 6 in the form of discs, that said first stack is in contact at its second end B with the face 81 of said rigid intermediate assembly, said rigid intermediate assembly being supported by a face 82 on the first bearing face C of a second stack of ceramics 7, which may be in the form crown; nevertheless given the relatively large diameter of this crown, said ceramics 7 could advantageously be in the form of crown sectors, in order for example to obtain a section of the active parts - of ceramics - of said second stack substantially equal to the section of said first stack.
  • said rigid intermediate assembly which transmits the prestressing forces in compression exerted by said rod 4 between said first and second stack, is constituted by the assembly of five rigid intermediate parts 8, and four intermediate stacks 8A, 8B, 8C, 8D, of piezoelectric ceramics, which can be in the form of crowns or sectors.
  • said first and second stacks and said intermediate stacks are connected so that the vibrational movements of said stacks are in phase.
  • said intermediate parts are of cylindrical shape, having for their axis said longitudinal axis xx1, and each provided at one end with an internal flange and at the other end with an external flange, which flanges are each provided with a bearing face, the two bearing faces of each of said rigid intermediate parts being parallel, and perpendicular to said longitudinal axis xx1.
  • Games 9A are provided between each rigid intermediate piece which are liable to vibrate and said counter-mass, as well as clearances between each rigid intermediate piece and said pavilion.
  • the pretension exerted by said rod which tends to bring said pavilion closer to said counter-mass, generates a compression preload in said first and second stacks and said intermediate stacks 8A, 8B, 8C, 8D , and generates a tensile stress in said rigid intermediate parts.
  • FIG 3 there is shown a cross-sectional view of an embodiment of an electro-acoustic transducer according to the invention, in an assembly of the "JANUS" type.
  • the housing 3 generally cylindrical with longitudinal axis xx1, is not sealed; inside said housing are arranged symmetrically with respect to the transverse axis yy1, cutting said electro-acoustic transducer in its middle, two pavilions 1, connected by a preloading rod 4, provided at each end with a thread on which are screwed two locking nuts 5, which are supported on said pavilions; are also placed inside said housing and symmetrically with respect to said axis yy1, two first stacks of ceramics 6, two rigid intermediate pieces 8, and two second stack of ceramics 7.
  • the central counterweight 2 is generally of reduced size and mass compared to the assemblies of FIGS. 1 and 2, and said rod 4 tends to bring said pavilions closer to one another, likewise that it tends to bring the first two stacks of ceramics 6 together, the two rigid intermediate pieces from one another, and the second second stacks of ceramics 7 from one another.
  • the rod 4 passes through the counter-mass, but is not rigidly linked to the latter.
  • the counterweight which can be in the form of a disc, has two parallel bearing faces 2A.
  • each of the pavilions is supported by at least part of its face 1A on the first end of a first stack of piezoelectric ceramics 6, which may be in the form of disc, which first stack is supported by its second end on a first bearing face 81, located on the bottom of a rigid intermediate piece 8, which can be in the shape of a bell, which is provided at its second end with a second bearing face 82, which is parallel to said first bearing face 81, which rigid intermediate piece is supported by said face 82 on the first end of a second stack of piezoelectric ceramics 7, which s presses at its second end on a support face 2A of said central counterweight.
  • JANUS this type of assembly known as "JANUS” consists essentially of two “TONPILZ” assemblies as described in FIGS. 1 and 2, which would be placed symmetrically with respect to a transverse axis yy1, and which would have a common counter-mass.
  • said stacks of piezoelectric ceramics are vibrated in phase located on the same side of said transverse axis yy1, and said stacks of piezoelectric ceramics are vibrated with a phase offset by 180 ° located on the other side of said transverse axis yy1.
  • the elastic covering 17 which covers said pavilions 1 also surrounds said stacks of piezoelectric ceramics.
  • the assembly consisting of said pavilions, said stacks and said counter-mass, coated with said elastic coating 17, is introduced into said housing and immobilized therein by parts 24 and 25 - generally in the form of tubes - and flanges.
  • the cavity 15 allowing the feed wires of said ceramics to travel from them to the feed connector is located inside said counter-mass.
  • this type of assembly includes baffles 23, generally made of cellular material, which substantially fill the space between said elastic coating and the walls of said housing.
  • FIG 4 there is shown a cross-sectional view on a reduced scale of an embodiment of an electro-acoustic transducer according to the invention, in an assembly of the "FLEXTENSIONAL" type.
  • the housing of said electro-acoustic transducer is constituted by a shell 28, generally made of epoxy glass composite, which has the shape of a cylinder with an axis perpendicular to the plane of FIG. 4, of elliptical section, the small of which axis is carried by the transverse axis yy1 and the major axis is carried by the longitudinal axis xx1.
  • Said support parts are usually constituted in this assembly by a central core 27 and two inserts 26, which extend along an axis perpendicular to the plane of the figure; on either side of said transverse axis yy1, are usually, and in a known manner, arranged stacks of ceramics, of elongated shape, which are supported at one of their ends on one of said inserts, preferably by means of a slide 41 and a wedge 29, and at their other end on said core; the prestressing is carried out in this type of assembly by the shell itself, which, during assembly, is pinched along its transverse axis yy1, so that the assembly constituted by said slides and shims, said stacks and said core, then the pinch is released, which tends to release said cylindrical shell along said longitudinal axis xx1 and thus prestress said ceramic stacks.
  • an elastic sealing coating 17 is provided, which surrounds said shell.
  • FIG 5 there is shown a cross-sectional view of an embodiment of an electro-acoustic transducer according to the invention, in an assembly of the "TONPILZ" type equipped with magnetostrictive transducer elements.
  • FIG. 6 a section along VI-VI of FIG. 5 has been represented.
  • said transducer elements are constituted by magnetostrictive bars 29, which are liable to vibrate along their longitudinal axis parallel to axis xx1, under the effect of the magnetic field produced by coils 30.
  • the bars if killed on the same circle of axis xx1 are magnetically linked together by magnetic rings 31 which are not shown in FIG. 6.
  • a first transducer element is constituted by four first bars situated outside the rigid intermediate piece 8; which four first bars are supported by a first of their respective ends on the support face 1A of the pavilion 1 by means of a crown 31, and by their second end and by means of a crown 31 on the first bearing face of said rigid intermediate piece which is constituted in this embodiment by four legs 83.
  • a second transducer element is constituted by four second bars located inside the rigid intermediate piece 8, which four second bars are supported by a first of their end and by means of a crown 31 respectively. on the bearing face 2A of the counterweight 2 and by their second end and / or by means of a second ring 31 on the second bearing face of said rigid intermediate piece 8, which is formed by the bottom 84, which is itself crossed by the preload rod 4.
  • said rigid intermediate part has in its central tubular part, a crown section which advantageously follows the contour of the coils 30 of said first four bars on its periphery, and whose internal profile matches the contour of coils 30 of said four second bars.
  • the technical field of the invention is that of immersed electro-acoustic transducers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP91430011A 1990-06-12 1991-06-10 Elektroakustischer Unterwasserwandler Expired - Lifetime EP0462037B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007552A FR2663182B1 (fr) 1990-06-12 1990-06-12 Transducteur electro-acoustique immerge.
FR9007552 1990-06-12

Publications (2)

Publication Number Publication Date
EP0462037A1 true EP0462037A1 (de) 1991-12-18
EP0462037B1 EP0462037B1 (de) 1994-09-07

Family

ID=9397702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91430011A Expired - Lifetime EP0462037B1 (de) 1990-06-12 1991-06-10 Elektroakustischer Unterwasserwandler

Country Status (5)

Country Link
US (1) US5130953A (de)
EP (1) EP0462037B1 (de)
CA (1) CA2044335A1 (de)
DE (1) DE69103819D1 (de)
FR (1) FR2663182B1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0555084A3 (en) * 1992-02-06 1993-11-03 Gen Electric Improved moment bender transducer
EP0596763A1 (de) * 1992-11-05 1994-05-11 ETAT-FRANCAIS représenté par le DELEGUE GENERAL POUR L'ARMEMENT (DPAG) Verfahren und Wandler zum Aussenden von niederfrequenten akustischen Wellen, welcher in einer Flüssigkeit unbeschränkt eingetaucht ist
EP0684085A1 (de) * 1994-05-26 1995-11-29 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Offene Sonar-Anordnung mit elektroakustische Wandler
FR2720586A1 (fr) * 1994-05-26 1995-12-01 France Etat Armement Antenne sonar à têtes démontables.
FR2728425A1 (fr) * 1994-12-15 1996-06-21 France Etat Armement Antenne lineaire electroacoustique d'emission et antenne d'emission/reception comprenant une telle antenne
EP0728533A1 (de) * 1995-02-23 1996-08-28 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Verfahren und Wandler zum Aussenden von akustischen Wellen in einer Flüssigkeit mit einer betonten Richtcharakteristik bei Niederfrequenzen
EP0728534A1 (de) * 1995-02-23 1996-08-28 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Verfahren und in einer Flussigkeit versekter Handler mit leichten Strahler zum Aussenden von niederfrequenten akustischen Wellen
EP0728535A1 (de) * 1995-02-23 1996-08-28 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Verfahren und Vorrichtung zur Verminderung der Resonanzfrequenz von Hohlräumen von Unterwasserwandlern
RU2164829C1 (ru) * 2000-09-06 2001-04-10 Закрытое акционерное общество "ИНЕФ" Скважинный акустический излучатель
RU2301329C2 (ru) * 2005-11-28 2007-06-20 Закрытое акционерное общество "ИНЕФ" Прибор акустический скважинный
FR3029816A1 (fr) * 2014-12-15 2016-06-17 Cedrat Tech Transducteur tubulaire ultrasonore modulaire et immersible

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357486A (en) * 1992-12-02 1994-10-18 Innovative Transducers Inc. Acoustic transducer
FR2713429B1 (fr) * 1993-12-03 1996-02-09 France Etat Armement Procédé d'émission de forte puissance d'ondes acoustiques et pavillons de transducteurs correspondants.
DE19512417C2 (de) * 1995-04-03 1997-02-06 Marco Systemanalyse Entw Piezoelektrischer Ultraschallwandler
US5615172A (en) * 1996-04-22 1997-03-25 Kotlyar; Oleg M. Autonomous data transmission apparatus
US6310427B1 (en) * 2000-05-03 2001-10-30 Bae Systems Aerospace Inc. Connecting apparatus for electro-acoustic devices
FR2818754B1 (fr) * 2000-12-21 2004-06-18 Inst Francais Du Petrole Dispositif pour engendrer des ondes elastiques focalisees dans un milieu materiel tel que le sous-sol, et methode pour sa mise en oeuvre
EP1923145A1 (de) * 2006-11-15 2008-05-21 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO Fern-Ultraschallwandlersystem
US7834490B1 (en) * 2006-12-28 2010-11-16 The United States Of America As Represented By The Secretary Of The Navy Bimetallic strips for energy harvesting, actuation and sensing
WO2008157616A2 (en) * 2007-06-18 2008-12-24 The Penn State Research Foundation Acoustic transducer
FR3001301B1 (fr) * 2013-01-24 2015-08-07 Cggveritas Services Sa Appareil et procede pour determiner la signature de champ lointain pour une source sismique vibratoire marine
ES2602508B1 (es) * 2015-07-16 2017-11-30 Universidad De Granada Dispositivo emisor de ondas ultrasónicas de torsión y transductor que lo comprende
RU168468U1 (ru) * 2016-11-29 2017-02-06 Закрытое акционерное общество "Руспром" Приемный гидрофон
US11079506B2 (en) 2016-12-16 2021-08-03 Pgs Geophysical As Multicomponent streamer
CN117055094A (zh) * 2023-07-27 2023-11-14 电子科技大学 一种用于震电测井的脉冲声源

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110825A (en) * 1959-09-02 1963-11-12 Clevite Corp Folded transducer
EP0367681A1 (de) * 1988-11-04 1990-05-09 Thomson-Csf Flexionsgespannter Wandler

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277436A (en) * 1956-02-09 1966-10-04 James W Fitzgerald Hollow electro-acoustic transducer
US3263210A (en) * 1964-06-24 1966-07-26 Schloss Fred Wide band hydrophone
US4072871A (en) * 1974-05-20 1978-02-07 Westinghouse Electric Corp. Electroacoustic transducer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110825A (en) * 1959-09-02 1963-11-12 Clevite Corp Folded transducer
EP0367681A1 (de) * 1988-11-04 1990-05-09 Thomson-Csf Flexionsgespannter Wandler

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0555084A3 (en) * 1992-02-06 1993-11-03 Gen Electric Improved moment bender transducer
EP0596763A1 (de) * 1992-11-05 1994-05-11 ETAT-FRANCAIS représenté par le DELEGUE GENERAL POUR L'ARMEMENT (DPAG) Verfahren und Wandler zum Aussenden von niederfrequenten akustischen Wellen, welcher in einer Flüssigkeit unbeschränkt eingetaucht ist
EP0684085A1 (de) * 1994-05-26 1995-11-29 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Offene Sonar-Anordnung mit elektroakustische Wandler
FR2720586A1 (fr) * 1994-05-26 1995-12-01 France Etat Armement Antenne sonar à têtes démontables.
FR2728425A1 (fr) * 1994-12-15 1996-06-21 France Etat Armement Antenne lineaire electroacoustique d'emission et antenne d'emission/reception comprenant une telle antenne
EP0728533A1 (de) * 1995-02-23 1996-08-28 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Verfahren und Wandler zum Aussenden von akustischen Wellen in einer Flüssigkeit mit einer betonten Richtcharakteristik bei Niederfrequenzen
EP0728534A1 (de) * 1995-02-23 1996-08-28 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Verfahren und in einer Flussigkeit versekter Handler mit leichten Strahler zum Aussenden von niederfrequenten akustischen Wellen
EP0728535A1 (de) * 1995-02-23 1996-08-28 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Verfahren und Vorrichtung zur Verminderung der Resonanzfrequenz von Hohlräumen von Unterwasserwandlern
FR2731129A1 (fr) * 1995-02-23 1996-08-30 France Etat Procede et dispositif pour diminuer la frequence de resonance des cavites des transducteurs immergeables
FR2731130A1 (fr) * 1995-02-23 1996-08-30 France Etat Procede et transducteurs pour emettre des ondes acoustiques dans un liquide avec une directivite marquee aux basses frequences
FR2731128A1 (fr) * 1995-02-23 1996-08-30 France Etat Procede et transducteurs immerges dans un fluide pour l'emission d'ondes acoustiques a basse frequence avec des pavillons alleges
US5636183A (en) * 1995-02-23 1997-06-03 Etat Francais As Represented By The Delegue General Pour L'armement Process and transducers submerged in a fluid for emitting low frequency acoustic waves with lightened horns
US5694374A (en) * 1995-02-23 1997-12-02 L'etat Francais Represente Par Le Delegue General Pour L'armement Process and device to reduce the resonant frequency of the cavities of the submersible transducers
RU2164829C1 (ru) * 2000-09-06 2001-04-10 Закрытое акционерное общество "ИНЕФ" Скважинный акустический излучатель
RU2301329C2 (ru) * 2005-11-28 2007-06-20 Закрытое акционерное общество "ИНЕФ" Прибор акустический скважинный
FR3029816A1 (fr) * 2014-12-15 2016-06-17 Cedrat Tech Transducteur tubulaire ultrasonore modulaire et immersible
WO2016097513A1 (fr) * 2014-12-15 2016-06-23 Cedrat Technologies Transducteur tubulaire ultrasonore modulaire et immersible
CN107206426A (zh) * 2014-12-15 2017-09-26 锡德雷特技术公司 模块化的可浸没超声波管状换能器
CN107206426B (zh) * 2014-12-15 2019-08-20 锡德雷特技术公司 模块化的可浸没超声波管状换能器
US10702889B2 (en) 2014-12-15 2020-07-07 Cedrat Technologies Modular, submersible ultrasonic tubular transducer

Also Published As

Publication number Publication date
EP0462037B1 (de) 1994-09-07
FR2663182A1 (fr) 1991-12-13
CA2044335A1 (en) 1994-01-06
US5130953A (en) 1992-07-14
FR2663182B1 (fr) 1992-09-18
DE69103819D1 (de) 1994-10-13

Similar Documents

Publication Publication Date Title
EP0462037B1 (de) Elektroakustischer Unterwasserwandler
FR2971112A1 (fr) Transducteur electro-acoustique basse frequence et procede de generation d'ondes acoustiques.
CA1138024A (fr) Generateur de gouttelettes d'encre pour imprimante a jet d'encre
EP0367681A1 (de) Flexionsgespannter Wandler
FR2688112A1 (fr) Transducteurs electro-acoustiques directifs comportant une coque etanche en deux parties.
EP0568592A1 (de) Flextensioneller akustischer wandler für tiefe untertauchung.
WO1995016211A1 (fr) Transducteur electro-acoustique a transformateur mecanique d'impedance
EP0434493B1 (de) Verfahren zur Vermögenserhöhung von elektroakustischen Tieffrequenzwandlern und damit übereinstimmende Wandler
FR2797552A1 (fr) Transducteur electro-acoustique
FR2740643A1 (fr) Transducteur du type soumis a une tension et une flexion, pouvant resister a des chocs
FR2688972A1 (fr) Transducteurs electro-acoustiques comportant une coque emettrice flexible et etanche.
EP0728535B1 (de) Verfahren und Vorrichtung zur Verminderung der Resonanzfrequenz von Hohlräumen von Unterwasserwandlern
EP0118329A2 (de) Geschwindigkeitshydrophon
CA2109465C (fr) Dispositif d'etancheite de moteurs electro-acoustiques
EP1062055B1 (de) Demontierbare ringförmige akustische sendeantenne
FR2713429A1 (fr) Procédé d'émission de forte puissance d'ondes acoustiques et pavillons de transducteurs correspondants.
EP3014606B1 (de) Ultraschallwandler
CA2109466C (fr) Procede et transducteurs pour emettre des ondes acoustiques basse frequence dans un liquide en immersion illimitee
FR2720588A1 (fr) Perfectionnement acoustique aux antennes sonar.
EP3985277A1 (de) Dämpfungsvorrichtung für raumfahrzeuge und verfahren zur herstellung dieser dämpfungsvorrichtung
FR2720585A1 (fr) Transducteur électro acoustique antenne sonar ouverts.
FR2739521A1 (fr) Transducteur electroacoustique et antenne de sonar equipee d'un tel transducteur
EP0794841A1 (de) Sonarantenne mit empfindlichkeitsspitzen mindestens bei zwei frequenzen
EP0684085A1 (de) Offene Sonar-Anordnung mit elektroakustische Wandler
EP2392151B1 (de) Bewegliches teil und mit einem solchen beweglichen teil ausgestatteter elektrodynamischer wandler

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19920217

17Q First examination report despatched

Effective date: 19931022

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19940907

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940907

REF Corresponds to:

Ref document number: 69103819

Country of ref document: DE

Date of ref document: 19941013

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19941006

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

Ref country code: DE

Effective date: 19941208

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

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960604

Year of fee payment: 6

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

Ref country code: GB

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

Effective date: 19970610

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970610

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

Ref country code: FR

Payment date: 20020627

Year of fee payment: 12

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

Ref country code: FR

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

Effective date: 20040227

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST