CN110809213B - Composite broadband transducer - Google Patents
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- CN110809213B CN110809213B CN201810883960.5A CN201810883960A CN110809213B CN 110809213 B CN110809213 B CN 110809213B CN 201810883960 A CN201810883960 A CN 201810883960A CN 110809213 B CN110809213 B CN 110809213B
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- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 239000000919 ceramic Substances 0.000 claims abstract description 142
- 238000005452 bending Methods 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims description 35
- 229910052755 nonmetal Inorganic materials 0.000 claims description 11
- 239000004593 Epoxy Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 6
- 238000003475 lamination Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 25
- 229920002635 polyurethane Polymers 0.000 description 22
- 239000004814 polyurethane Substances 0.000 description 22
- 238000003466 welding Methods 0.000 description 8
- 229910010293 ceramic material Inorganic materials 0.000 description 7
- 230000009977 dual effect Effects 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention relates to a composite broadband transducer, comprising: a bending plate (1), a plurality of first piezoelectric ceramic plates (2) and a plurality of first cymbals (3); a plurality of first piezoelectric ceramic plates (2) are fixedly connected with one side of the bending plate (1), and the first cymbals (3) are correspondingly and fixedly connected with the first piezoelectric ceramic plates (2); the middle part of the first cymbal (3) is not in direct contact with the first piezoelectric ceramic piece (2), and a space is reserved; the multi-mode of the composite structure is utilized to realize wider bandwidth, and the defect of narrow bandwidth of the traditional two-lamination, three-lamination type transducer and cymbal type transducer is overcome; simultaneously has the characteristics of low frequency, small size and light weight of bending and cymbal bending and stretching vibration of two laminates and three laminates.
Description
Technical Field
The invention belongs to the technical field of underwater sound, and particularly relates to a composite broadband transducer.
Background
Acoustic waves are a type of energy carrier that propagates far in liquids, solids. By utilizing the propagation characteristics of acoustic signals in the medium, human beings can obtain relevant characteristic information of liquid and solid, and an effective means is provided for human beings to know oceans, develop oceans, oil exploration and the like.
The transducer is used as a device for generating acoustic signals and plays an important role in the field of underwater sound. With the deep research of the human beings on the fields of complex environments such as ocean, the requirements on the transducer are also improved. For example, in order to increase the amount of information transmission, to resist the multi-path effect, to respond quickly, etc., the bandwidth of the transducer needs to be increased.
Currently, conventional low frequency, small size, lightweight transducers include, for example: two-piece, three-piece and cymbal transducers;
as shown in fig. 8, the three-laminated transducer includes: a curved plate 1, a first piezoelectric ceramic piece 2 and a second piezoelectric ceramic piece 4; wherein the first piezoelectric ceramic plate 2 and the second piezoelectric ceramic plate 4 are positioned at two sides of the bending plate 1;
the two-piece transducer includes: a curved plate 1 and a first piezoelectric ceramic sheet 2; wherein the first piezoelectric ceramic piece 2 is positioned at one side of the bending plate 1; i.e. the two-stack transducer removes the second piezoelectric ceramic 4 as shown in fig. 8;
as shown in fig. 9, the cymbal transducer includes: a first piezoelectric ceramic 2, a first cymbal 3, and a second cymbal 5; the first cymbal 3 and the second cymbal 5 are located 2 on either side of the curved plate 1.
However, the conventional low-frequency, small-size and light-weight transducers have the defect of narrow working bandwidth, so that the problems of slow waveform oscillation, slow towing wavelength, slow information transmission, slow response, less acquired information, quick source level attenuation deviating from a resonance point and the like are caused in the use processes of underwater acoustic communication, well logging and the like. Increasing the operating bandwidth of such transducers is an urgent problem to be solved.
Disclosure of Invention
The present invention is directed to solving the above-mentioned drawbacks of the conventional transducer, and provides a composite wideband transducer, which includes: the bending plate, a plurality of first piezoelectric ceramic plates and a plurality of first cymbals; the first piezoelectric ceramic plates are fixedly connected with one side of the bending plate, and the first cymbals are correspondingly and fixedly connected with the first piezoelectric ceramic plates; the middle part of the first cymbal is not in direct contact with the first piezoelectric ceramic plate, and a space is reserved.
As one of the improvements of the above technical scheme, a first connecting surface formed on one side of the fixed bending plate of the first piezoelectric ceramic sheet is coated with epoxy, and the first connecting surface is bonded by positioning and applying prestress and baked in an oven at 80 ℃ for more than 4 hours. The first cymbal is correspondingly fixed on a second connecting surface formed on the first piezoelectric ceramic plate, prestress is applied through positioning, the second connecting surface is bonded, and the second connecting surface is baked in an oven at 80 ℃ for more than 4 hours.
As one of the improvements of the above technical scheme, the first piezoelectric ceramic plates are in one-to-one correspondence with the first cymbals, and the numbers of the first piezoelectric ceramic plates and the first cymbals are opposite.
As one of the improvements of the above technical solutions, the first piezoelectric ceramic sheet is made of a functional ceramic material with piezoelectricity, i.e. a nonmetallic material, such as PZT material; the bending plate and the first cymbal are made of metal or nonmetal materials, and the shape of the bending plate, the first cymbal and the second cymbal is round or rectangular.
As one of the improvements of the above technical solutions, the curved plate and the first cymbal are radially provided with a plurality of radial narrow slits.
As one of the improvements of the above technical solutions, the composite wideband transducer further includes: a plurality of second piezoelectric ceramic plates and a plurality of second cymbals; the second piezoelectric ceramic plates are fixedly connected with the other side of the bending plate and are symmetrical to the first piezoelectric ceramic plates; the second cymbal is fixedly connected below the second piezoelectric ceramic plate and is symmetrical to the first cymbal; the middle part of the second cymbal is not in direct contact with the second piezoelectric ceramic plate, and a space is reserved.
As one of the improvements of the technical scheme, the second piezoelectric ceramic plates are in one-to-one correspondence with the second cymbals, and the number of the second piezoelectric ceramic plates is opposite to the number of the second cymbals.
As one of the improvements of the above technical solutions, the second piezoelectric ceramic sheet is made of a piezoelectric functional ceramic material, i.e., a nonmetallic material, such as PZT material; the second cymbal is made of metal or nonmetal materials, and the shape of the second cymbal is round or rectangular; the second piezoelectric ceramic plate and the first piezoelectric ceramic plate have the same shape, and the second cymbal and the first cymbal have the same shape.
As one of the improvements of the technical scheme, a plurality of radial narrow slits are formed in the radial direction of the second cymbal.
As one of the improvements of the above technical scheme, a third connecting surface formed on the other side of the second piezoelectric ceramic sheet fixing bending plate is coated with epoxy, and the third connecting surface is bonded by positioning and applying prestress and baked in an oven at 80 ℃ for more than 4 hours. The second cymbal is correspondingly fixed on a fourth connecting surface formed below the second piezoelectric ceramic plate, prestress is applied through positioning, the fourth connecting surface is bonded, and the fourth connecting surface is baked in an oven at 80 ℃ for more than 4 hours. Wherein, each connecting surface of the first piezoelectric ceramic piece, the second piezoelectric ceramic piece and the bending plate can be coated with epoxy at the same time, and the prestress is applied by positioning and baked for more than 4 hours in an oven at 80 ℃. On the basis, the bonding surfaces of the first piezoelectric ceramic piece, the second piezoelectric ceramic piece 4 and the bending plate can be coated with epoxy at the same time, prestress is applied through positioning, and the bonding surfaces of the first cymbal and the second cymbal and the bonding surface of the bonded structure are coated with epoxy at the same time in an oven at 80 ℃ for more than 4 hours, and prestress is applied through positioning and the bonding surfaces of the first cymbal and the second cymbal and the bonding surface of the bonded structure are baked in the oven at 80 ℃ for more than 4 hours.
As one of the improvements of the above technical solutions, when the first cymbal, the second cymbal and the bending plate are made of metal materials, the first piezoelectric ceramic and the second piezoelectric ceramic adopt a connection mode that the positive electrode and the negative electrode are respectively connected in parallel, and the positive electrode and the negative electrode which are used as input or output are respectively welded on the cymbal and the bending plate; after welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
When the first cymbal, the second cymbal and the bending plate are made of nonmetal materials, the first piezoelectric ceramic and the second piezoelectric ceramic adopt a mode of respectively connecting the positive electrode and the negative electrode in parallel, and the positive electrode and the negative electrode which are used as input or output are directly led out from the positive electrode and the negative electrode of the piezoelectric ceramic. After welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
As one of the improvements of the above technical solutions, the composite wideband transducer is divided into two working modes: single-sided radiation and double-sided radiation; wherein,,
when the transducer adopts a single-sided working mode, the composite broadband transducer is embedded in the rigid watertight shell; placing decoupling materials such as vacuum rubber and the like on the contact surface of the two; a portion of the rigid watertight housing and the transducer are single-sided polyurethane infused. And placing the mixture into an oven at 80 ℃ to be dried for more than 4 hours.
When the transducer adopts a double-sided working mode, the transducer is wholly filled with polyurethane or partially filled, so that the piezoelectric ceramic is watertight, and the positive electrode and the negative electrode are not contacted with a working environment medium at the same time.
The invention has the advantages that:
the transducer overcomes the defect of narrow bandwidth when the traditional or two-lamination or three-lamination transducer and the cymbal type transducer work in a resonance way, and realizes wider working bandwidth by utilizing the multimode of the composite structure, thereby effectively solving the corresponding problem caused by the narrow working bandwidth; simultaneously has the characteristics of low frequency, small size and light weight of bending and cymbal bending and stretching vibration of two laminates and three laminates.
Drawings
FIG. 1 is a cross-sectional view of a compound broadband transducer (i.e., compound dual cymbal transducer) of the present invention;
FIG. 2 is a cross-sectional view of a compound broadband transducer (i.e., compound single cymbal transducer) according to another embodiment of the invention;
FIG. 3 is a cross-sectional view of a single-sided operation of a composite broadband transducer embedded rigid watertight housing of the present invention;
FIG. 4 is a schematic diagram of the structure of a transducer array of several composite wideband transducers of the present invention;
FIG. 5 is a schematic view of a composite wideband transducer (i.e., a composite single cymbal transducer) of another embodiment of the present invention having a first cymbal with a plurality of narrow slits;
FIG. 6 is a schematic structural view of a composite wideband transducer (i.e., a rectangular composite dual cymbal transducer) according to another embodiment of the present invention;
FIG. 6a is a schematic structural view of a composite wideband transducer (i.e., a rectangular composite dual cymbal opening transducer) according to yet another embodiment of the present invention;
FIG. 7 is a schematic representation of the transmit response of a composite wideband transducer of the present invention;
FIG. 8 is a schematic diagram of a structure of a prior art three-stack transducer;
fig. 9 is a schematic structural view of a conventional cymbal transducer.
Reference numerals:
1. bending plate 2, first piezoelectric ceramic piece
3. First cymbal 4, second piezoelectric ceramic plate
5. Second cymbal 6, rigid watertight housing
7. Polyurethane 8, unidirectional sonic radiation
9. Narrow slit
Detailed Description
Example 1,
As shown in fig. 1, the present invention proposes a composite broadband transducer, i.e., a composite dual cymbal transducer, comprising: a bending plate 1, a plurality of first piezoelectric ceramic plates 2, a plurality of first cymbals 3, a plurality of second piezoelectric ceramic plates 4 and a plurality of second cymbals 5; the plurality of first piezoelectric ceramic plates 2 are fixedly connected with the upper side of the bending plate 1, and the first cymbals 3 are correspondingly and fixedly connected with the first piezoelectric ceramic plates 2; the middle part of the first cymbal 3 is not in direct contact with the first piezoelectric ceramic plate 2, and a space is reserved; the plurality of second piezoelectric ceramic plates 4 are fixedly connected with the lower side of the bending plate 1 and are symmetrical with the plurality of first piezoelectric ceramic plates 2; the second cymbal 5 is fixedly connected below the second piezoelectric ceramic plate 4 and is symmetrical with the first cymbal 3; the middle part of the second cymbal 5 is not in direct contact with the second piezoceramic wafer 4 and there is room.
As one of the improvements of the above-mentioned technical solutions, as shown in fig. 1 and 3, a first connection surface formed on the upper side of the first piezoelectric ceramic sheet 2 fixedly connected with the curved plate 1 is coated with epoxy, and the first connection surface is bonded by positioning and applying a pre-stress, and baked in an oven at 80 ℃ for more than 4 hours. The first cymbal 3 is correspondingly and fixedly connected with a second connecting surface formed on the first piezoelectric ceramic plate 2, prestress is applied through positioning, the second connecting surface is bonded, and the second connecting surface is baked in an oven at 80 ℃ for more than 4 hours. And a third connecting surface formed on the lower side of the second piezoelectric ceramic plate 4 fixedly connected with the bending plate 1 is coated with epoxy, is bonded by positioning and applying prestress, and is baked in an oven at 80 ℃ for more than 4 hours. The second cymbal 5 is correspondingly and fixedly connected with a fourth connecting surface formed below the second piezoelectric ceramic plate 4, and is bonded by positioning and applying prestress, and is baked for more than 4 hours in an oven at 80 ℃.
The connection surfaces of the first piezoelectric ceramic piece 2, the second piezoelectric ceramic piece 4 and the bending plate 1 can be coated with epoxy at the same time, and the prestress is applied through positioning and baked in an oven at 80 ℃ for more than 4 hours. On the basis, the bonding surfaces of the first cymbal 3 and the second cymbal 5 and the bonding surfaces of the first piezoelectric ceramic plate 2 and the second piezoelectric ceramic plate 4 are coated with epoxy at the same time, and the prestress is applied through positioning and baked in an oven at 80 ℃ for more than 4 hours.
As one of the improvements of the above technical solution, the first piezoelectric ceramic plates 2 are in one-to-one correspondence with the first cymbals 3, and the numbers of the first piezoelectric ceramic plates and the first cymbals are opposite. The second piezoelectric ceramic plates 4 are in one-to-one correspondence with the second cymbals 5, and the numbers of the second piezoelectric ceramic plates and the second cymbals 5 are opposite.
As one of the improvements of the above-mentioned technical solutions, as shown in fig. 1, the first piezoelectric ceramic sheet 2 is made of a functional ceramic material having piezoelectricity, i.e., a nonmetallic material, such as PZT material; the bending plate 1 and the first cymbal 3 are made of metal or nonmetal materials, and are circular with the shape of the first piezoelectric ceramic plate 2. The second piezoelectric ceramic plate 4 is made of a functional ceramic material with piezoelectricity, namely a nonmetallic material, such as a PZT material, and the second cymbal 5 is made of a metallic or nonmetallic material and is circular with the second piezoelectric ceramic plate 4; wherein, the shape of the second piezoelectric ceramic piece 4 is the same as that of the first piezoelectric ceramic piece 2, and the shape of the second cymbal 5 is the same as that of the first cymbal 3.
As one of the improvements of the above technical solution, as shown in fig. 5, a plurality of radial narrow slits are formed in the radial direction of the first cymbal 3 and the second cymbal 5.
As one of the improvements of the above technical solution, as shown in fig. 4, 6 dual cymbal transducers are distributed on the curved plate 1 to form a transducer array.
As one of the improvements of the above technical solution, when the first cymbal 3, the second cymbal 5 and the bending plate 1 are made of metal materials, the first piezoelectric ceramic 1 and the second piezoelectric ceramic 4 adopt a connection mode in which positive electrodes and negative electrodes are respectively connected in parallel, and the positive electrodes and the negative electrodes serving as input or output are respectively welded to the cymbal 3 and the bending plate 1; after welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
When the first cymbal 3, the second cymbal 5 and the bending plate 1 are made of nonmetal materials, the first piezoelectric ceramic 1 and the second piezoelectric ceramic 4 adopt a mode of respectively connecting the positive electrode and the negative electrode in parallel, and the positive electrode and the negative electrode which are used as input or output are directly led out from the positive electrode and the negative electrode of the piezoelectric ceramic. After welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
As shown in fig. 7, f1 is a bending mode of a composite structure of a bending plate and piezoelectric ceramic, f2 is an inherent mode of a cymbal, and the transducer adopts the composite structure, and has two modes in a near working frequency band instead of one mode of a single structure, so that the purpose of widening bandwidth is achieved.
EXAMPLE 2,
As shown in fig. 2, the present invention proposes another composite wideband transducer, i.e., a composite single cymbal transducer, comprising: the bending plate 1, a plurality of first piezoelectric ceramic plates 2, a plurality of first cymbals 3 and a plurality of second piezoelectric ceramic plates 4; the plurality of first piezoelectric ceramic plates 2 are fixedly connected with the upper side of the bending plate 1, and the first cymbals 3 are correspondingly and fixedly connected with the first piezoelectric ceramic plates 2; the middle part of the first cymbal 3 is not in direct contact with the first piezoelectric ceramic plate 2, and a space is reserved; the second piezoelectric ceramic plates 4 are fixedly connected with the lower side of the bending plate 1 and are symmetrical to the first piezoelectric ceramic plates 2.
As one of the improvements of the above technical solution, the first piezoelectric ceramic plates 2 are in one-to-one correspondence with the first cymbals 3, and the numbers of the first piezoelectric ceramic plates and the first cymbals are opposite.
As one of the improvements of the above-mentioned technical solutions, the first piezoelectric ceramic sheet 2 is made of a functional ceramic material having piezoelectricity, i.e., a nonmetallic material such as PZT material; the bending plate 1, the first cymbal 3 are made of metal or nonmetal materials, and the shape of the first piezoelectric ceramic plate 2 is circular. The second piezoelectric ceramic piece 4 is made of a functional ceramic material with piezoelectricity, namely a nonmetallic material, such as a PZT material; the second piezoelectric ceramic plates 4 are all round in shape; wherein the second piezoelectric ceramic sheet 4 has the same shape as the first piezoelectric ceramic sheet 2.
As one of the improvements of the above-mentioned technical solutions,
when the first cymbal 3 and the bending plate 1 are made of metal materials, the first piezoelectric ceramic 1 and the second piezoelectric ceramic 4 are respectively welded to the cymbal 3 and the bending plate 1 by adopting a mode of respectively connecting the positive electrode and the negative electrode in parallel, and the positive electrode and the negative electrode which are used as input or output are respectively welded to the cymbal 3 and the bending plate 1. After welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
When the first cymbal 3 and the bending plate 1 are made of nonmetallic materials, the first piezoelectric ceramic 1 and the second piezoelectric ceramic 4 adopt a mode of respectively connecting the positive electrode and the negative electrode in parallel, and the positive electrode and the negative electrode which are used as input or output are directly led out from the positive electrode and the negative electrode of the piezoelectric ceramic. After welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
EXAMPLE 3,
As shown in fig. 6, the present invention proposes another composite wideband transducer, i.e., a rectangular composite dual cymbal transducer, comprising: a bending plate 1, a plurality of first piezoelectric ceramic plates 2, a plurality of first cymbals 3, a plurality of second piezoelectric ceramic plates 4 and a plurality of second cymbals 5; the plurality of first piezoelectric ceramic plates 2 are fixedly connected with the upper side of the bending plate 1, and the first cymbals 3 are correspondingly and fixedly connected with the first piezoelectric ceramic plates 2; the middle part of the first cymbal 3 is not in direct contact with the first piezoelectric ceramic plate 2, and a space is reserved; the plurality of second piezoelectric ceramic plates 4 are fixedly connected with the lower side of the bending plate 1 and are symmetrical with the plurality of first piezoelectric ceramic plates 2; the second cymbal 5 is fixedly connected below the second piezoelectric ceramic plate 4 and is symmetrical with the first cymbal 3; the middle part of the second cymbal 5 is not in direct contact with the second piezoceramic wafer 4 and there is room.
As one of the improvements of the above technical solution, the first piezoelectric ceramic plates 2 are in one-to-one correspondence with the first cymbals 3, and the numbers of the first piezoelectric ceramic plates and the first cymbals are opposite. The second piezoelectric ceramic plates 4 are in one-to-one correspondence with the second cymbals 5, and the numbers of the second piezoelectric ceramic plates and the second cymbals 5 are opposite.
As one of the improvements of the above-described technical solutions, the first piezoelectric ceramic sheet 2 is made of a functional material having piezoelectricity, that is, a nonmetallic material such as PZT material; the bending plate 1, the first cymbal 3 are made of metal or nonmetal materials, and the first piezoelectric ceramic plate 2 is rectangular in shape. The second piezoelectric ceramic piece 4 is made of a functional ceramic material with piezoelectricity, namely a nonmetallic material, such as a PZT material; the second cymbal 5 is made of metal or nonmetal materials, and the shape of the second piezoelectric ceramic piece 4 is rectangular; wherein, the shape of the second piezoelectric ceramic piece 4 is the same as that of the first piezoelectric ceramic piece 2, and the shape of the second cymbal 5 is the same as that of the first cymbal 3.
As one of the improvements of the above technical solution, as shown in fig. 6, the first cymbal 3 and the second cymbal 5 are both convex outwards, and a totally enclosed space with a trapezoid cross section is left therein. In other embodiments, as shown in fig. 6a, the first cymbal 3 and the second cymbal 5 are both convex outwards, and a non-fully enclosed space with a trapezoid cross section is left therein.
As one of the improvements of the above-mentioned technical solutions,
when the first cymbal 3, the second cymbal 5 and the bending plate 1 are made of metal materials, the first piezoelectric ceramic 1 and the second piezoelectric ceramic 4 adopt a mode of respectively connecting the positive electrode and the negative electrode in parallel, and the positive electrode and the negative electrode which are used as input or output are respectively welded on the cymbal 3 and the bending plate 1. After welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
When the first cymbal 3, the second cymbal 5 and the bending plate 1 are made of nonmetallic materials, the first piezoelectric ceramic 1 and the second piezoelectric ceramic 4 adopt a mode of respectively connecting the positive electrode and the negative electrode in parallel, and the positive electrode and the negative electrode which are used as input or output are directly led out from the positive electrode and the negative electrode of the piezoelectric ceramic. After welding, the whole or part of polyurethane is poured according to a double-sided working mode or a single-sided working mode, and the polyurethane is baked in an oven at 80 ℃ for more than 4 hours.
As an improvement of the foregoing technical solution, in the foregoing embodiment, the composite wideband transducer is divided into two working modes: single-sided radiation and double-sided radiation; wherein,,
when the transducer adopts a single-sided working mode, as shown in fig. 3, the composite broadband transducer is embedded in a rigid watertight shell; placing decoupling materials such as vacuum rubber and the like on the contact surface of the two; for use in; polyurethane is of interest within rigid watertight enclosures for use. And placing the mixture into an oven at 80 ℃ to be dried for more than 4 hours. In other embodiments, a plurality of composite broadband transducers are symmetrically placed at both ends of the cylindrical structure, and decoupling material is placed at the interface of the transducers and the cylindrical structure, and a watertight gel is poured.
When the energy converter adopts a double-sided working mode, the energy converter is wholly filled with polyurethane or partially filled with polyurethane, so that the piezoelectric ceramic is watertight, and the anode and the cathode are not contacted with a working environment medium at the same time.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.
Claims (10)
1. A composite broadband transducer, the composite broadband transducer comprising: a bending plate (1), a first piezoelectric ceramic plate (2) and a first cymbal (3); the first piezoelectric ceramic piece (2) is fixedly connected with one side of the bending plate (1), and the first cymbal (3) is correspondingly and fixedly connected to the first piezoelectric ceramic piece (2); the middle part of the first cymbal (3) is not in direct contact with the first piezoelectric ceramic piece (2), and a space is reserved;
the composite wideband transducer further comprises: the second piezoelectric ceramic piece (4) is fixedly connected with the other side of the bending plate (1) and is symmetrical to the first piezoelectric ceramic piece (2);
and distributing a plurality of composite broadband transducers on the bending plate (1) to form a composite broadband transducer array.
2. The composite broadband transducer according to claim 1, wherein a first connection surface formed at one side of the first piezoelectric ceramic sheet (2) fixedly connected to the curved plate (1) is coated with epoxy, and the first connection surface is bonded by positioning and applying a pre-stress, and baked in an oven at 80 ℃ for more than 4 hours; the first cymbal (3) is correspondingly fixed on a second connecting surface formed on the first piezoelectric ceramic plate (2), and the second connecting surface is bonded by positioning and applying prestress and is baked in an oven at 80 ℃ for more than 4 hours.
3. The composite broadband transducer according to claim 1, wherein the first piezoelectric ceramic plates (2) are in one-to-one correspondence with the first cymbals (3), and the numbers of the first piezoelectric ceramic plates and the first cymbals are opposite to each other.
4. The composite broadband transducer according to claim 1, wherein the first piezoelectric ceramic sheet (2) is made of a non-metallic functional material; the bending plate (1) and the first cymbal (3) are made of metal or nonmetal materials, and the shapes of the bending plate, the first cymbal and the second cymbal are round or rectangular.
5. The composite wideband transducer according to claim 1, wherein the curved plate (1) and the first cymbal (3) are radially slotted with radial slots.
6. The composite wideband transducer of claim 1, wherein the composite wideband transducer further comprises: a plurality of second cymbals (5); the second cymbal (5) is fixedly connected below the second piezoelectric ceramic piece (4) and is symmetrical with the first cymbal (3); the middle part of the second cymbal (5) is not in direct contact with the second piezoelectric ceramic plate (4), and a space is reserved.
7. The composite broadband transducer according to claim 6, wherein the second piezoelectric ceramic pieces (4) are in one-to-one correspondence with the second cymbals (5), and the two pieces are opposite in number.
8. The composite broadband transducer according to claim 6, wherein the second piezoceramic sheet (4) is made of a non-metallic material; the second cymbal (5) is made of metal or nonmetal materials, and the shape of the second cymbal and the second cymbal are round or rectangular; wherein the second piezoelectric ceramic plate (4) has the same shape as the first piezoelectric ceramic plate (2), and the second cymbal (5) has the same shape as the first cymbal (3).
9. The composite broadband transducer according to claim 6, wherein the second cymbal (5) is radially slotted with radial slots.
10. The composite broadband transducer of claim 6, wherein the composite material comprises a plurality of transducers,
when the first cymbal (3), the second cymbal (5) and the bending plate (1) are made of metal materials, the first piezoelectric ceramic piece (2) and the second piezoelectric ceramic piece (4) adopt a mode of respectively connecting an anode and a cathode in parallel, and the anode and the cathode which are used as input or output are respectively welded on the first cymbal (3) and the bending plate (1);
when the first cymbal (3), the second cymbal (5) and the bending plate (1) are made of nonmetal materials, the first piezoelectric ceramic piece (2) and the second piezoelectric ceramic piece (4) adopt a connection mode that positive poles and negative poles are respectively connected in parallel, and the positive poles and the negative poles which are used as input or output are directly led out from the positive poles and the negative poles of the piezoelectric ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810883960.5A CN110809213B (en) | 2018-08-06 | 2018-08-06 | Composite broadband transducer |
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| CN113301478B (en) * | 2021-05-16 | 2024-08-02 | 西北工业大学 | Reinforced concave cylinder type bending-stretching transducer structure and method |
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| CN101321411A (en) * | 2008-06-13 | 2008-12-10 | 北京信息科技大学 | Cylindrical stack wafer underwater transducer |
| CN204167367U (en) * | 2014-11-13 | 2015-02-18 | 中路高科交通科技集团有限公司 | A kind of cymbals formula piezo-electric device |
| CN107221316A (en) * | 2017-06-06 | 2017-09-29 | 哈尔滨工程大学 | A kind of broad band low frequency Helmholtz underwater acoustic transducers |
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| US20020162551A1 (en) * | 2001-05-02 | 2002-11-07 | Litherland Craig M. | Cymbal-shaped actuator for a nebulizing element |
| CN201862697U (en) * | 2010-12-01 | 2011-06-15 | 苏州市职业大学 | Punching die of metal end cap for array Cymbal energy transducer |
| CN205829498U (en) * | 2016-08-01 | 2016-12-21 | 山西省交通科学研究院 | A kind of dynamical piezoelectricity road surface transducer architecture |
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| CN1621163A (en) * | 2004-12-24 | 2005-06-01 | 北京信息工程学院 | Novel broad band super sound piezoelectric compound transducer |
| CN101321411A (en) * | 2008-06-13 | 2008-12-10 | 北京信息科技大学 | Cylindrical stack wafer underwater transducer |
| CN204167367U (en) * | 2014-11-13 | 2015-02-18 | 中路高科交通科技集团有限公司 | A kind of cymbals formula piezo-electric device |
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