CN115134705B - Multi-plate and shell flexural transducer - Google Patents
Multi-plate and shell flexural transducer Download PDFInfo
- Publication number
- CN115134705B CN115134705B CN202210569507.3A CN202210569507A CN115134705B CN 115134705 B CN115134705 B CN 115134705B CN 202210569507 A CN202210569507 A CN 202210569507A CN 115134705 B CN115134705 B CN 115134705B
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- China
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- sound radiation
- plate
- shell
- end cover
- functional material
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- 230000005855 radiation Effects 0.000 claims abstract description 128
- 239000000463 material Substances 0.000 claims abstract description 67
- 238000005452 bending Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000002033 PVDF binder Substances 0.000 description 8
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
本发明提供了一种涉及水声探测、海洋工程以及扬声器技术领域的多板壳弯张换能器，包括声辐射壳体和功能材料驱动体，功能材料驱动体连接于声辐射壳体内腔中；声辐射壳体包括一级声辐射板、二级声辐射板、声辐射壳体上端盖以及声辐射壳体下端盖，一级声辐射板和二级声辐射板分别位于声辐射壳体上端盖与声辐射壳体下端盖之间，一级声辐射板和二级声辐射板交替排列；当功能材料驱动体工作时推动声辐射壳体上端盖和声辐射壳体下端盖进行振动，从而带动一级声辐射板和二级声辐射板弯曲形变进而产生低频声波。本发明能够获得工作频带更宽，低频发射能力更强，水下工作深度更深且体积重量及线度更小的弯张换能器。
The present invention provides a multi-plate shell flextensional transducer related to the fields of underwater acoustic detection, marine engineering and speaker technology, comprising a sound radiation shell and a functional material driving body, wherein the functional material driving body is connected to the inner cavity of the sound radiation shell; the sound radiation shell comprises a primary sound radiation plate, a secondary sound radiation plate, an upper end cover of the sound radiation shell and a lower end cover of the sound radiation shell, wherein the primary sound radiation plate and the secondary sound radiation plate are respectively located between the upper end cover of the sound radiation shell and the lower end cover of the sound radiation shell, and the primary sound radiation plate and the secondary sound radiation plate are arranged alternately; when the functional material driving body is working, the upper end cover of the sound radiation shell and the lower end cover of the sound radiation shell are pushed to vibrate, thereby driving the primary sound radiation plate and the secondary sound radiation plate to bend and deform to generate low-frequency sound waves. The present invention can obtain a flextensional transducer with a wider working frequency band, stronger low-frequency emission capability, deeper underwater working depth, smaller volume, weight and linearity.
Description
Technical Field
The invention relates to the technical fields of underwater sound detection, ocean engineering and loudspeakers, in particular to a multi-plate-shell bending transducer.
Background
In underwater sound detection, in order to increase the detection distance, a low-frequency high-power emission transducer is generally selected as an active detection acoustic emitter. The bending transducer generates low-frequency sound waves by using the bending vibration of the plate shell, has the advantage of small-size high-power emission, and is very suitable for underwater sound wave long-distance detection. For low frequency transmitting transducers, it is generally desirable that they be sufficiently wide in operating bandwidth and small in size weight and have a relatively uniform sound field distribution throughout space. However, conventional flextensional transducers are small in size but do not have a wide enough operating bandwidth. In addition, for conventional flextensional transducers, the spatial distribution of the acoustic radiation energy tends to have significant directivity after the operating frequency reaches an octave. In addition, the low-frequency small-size underwater acoustic transducer has the common problem that the working performance sensitively changes along with the underwater working depth. The problems limit the application range and the application environment of the low-frequency small-size sound source, and in view of the problems, the invention provides a novel bending transducer based on multi-plate-shell sound radiation, which can remarkably improve the problems faced in the small-size sound source and can be used as a good loudspeaker in the air due to the characteristics of the novel bending transducer.
According to the search of the prior art patent literature, the Chinese invention patent publication No. CN103646643B discloses a bending transducer adopting a PVDF piezoelectric film, belongs to the technical field of underwater sound detection, and has the characteristics of low frequency, broadband, high receiving sensitivity, high-power sound radiation and horizontal omni-directional directivity. The piezoelectric ceramic wafer stack comprises a piezoelectric ceramic wafer stack body and a PVDF film, wherein the PVDF film surrounds the piezoelectric ceramic wafer stack body, a connecting piece is arranged between the PVDF film and the piezoelectric ceramic wafer stack body, and the piezoelectric ceramic wafer stack body further comprises a device for enabling the PVDF film to generate prestress. The PVDF film is adopted to replace a metal shell of the traditional flextensional transducer, the PVDF film and the piezoelectric crystal stack are adopted as sensitive elements, the PVDF film vibrates in a flexural vibration mode of the film under a simple support boundary condition, the piezoelectric crystal stack vibrates in a longitudinal vibration mode, a higher bandwidth can be obtained through mode coupling, and broadband emission sound waves are realized. The invention provides a multi-plate-shell bending transducer, which solves the problems of insufficient working bandwidth, limited application range, applicable environment and the like. Thus, the method described in this document is a different inventive concept than the method described in the present invention.
Disclosure of Invention
In view of the shortcomings in the prior art, it is an object of the present invention to provide a multi-plate case flextensional transducer.
The multi-plate shell bending transducer comprises an acoustic radiation shell and a functional material driving body, wherein the functional material driving body is connected in an inner cavity of the acoustic radiation shell;
The sound radiation shell comprises a primary sound radiation plate, a secondary sound radiation plate, a sound radiation shell upper end cover and a sound radiation shell lower end cover, wherein the primary sound radiation plate and the secondary sound radiation plate are respectively positioned between the sound radiation shell upper end cover and the sound radiation shell lower end cover, and the primary sound radiation plate and the secondary sound radiation plate are alternately arranged;
when the functional material driving body works, the upper end cover of the sound radiation shell and the lower end cover of the sound radiation shell are pushed to vibrate, so that the primary sound radiation plate and the secondary sound radiation plate are driven to bend and deform, and then low-frequency sound waves are generated.
In some embodiments, the primary acoustic radiating plate is connected to the outside of the acoustic radiating shell upper end cover and the acoustic radiating shell lower end cover, and the secondary acoustic radiating plate is connected to the inside of the acoustic radiating shell upper end cover and the acoustic radiating shell lower end cover;
Or the second-level sound radiation plate is connected to the outer sides of the upper end cover of the sound radiation shell and the lower end cover of the sound radiation shell, and the first-level sound radiation plate is connected to the inner sides of the upper end cover of the sound radiation shell and the lower end cover of the sound radiation shell;
The primary sound radiation plate and the secondary sound radiation plate are driven to be arranged in a staggered way.
In some embodiments, the primary acoustic radiating plates and the secondary acoustic radiating plates are alternately staggered in a circular or polygonal shape arranged between the acoustic radiating housing upper end cap and the acoustic radiating housing lower end cap.
In some embodiments, the functional material driving body includes a functional material driving body upper cover plate, a functional material driving body lower cover plate, and a functional material driving rod, and the functional material driving body upper cover plate and the functional material driving body lower cover plate are respectively connected to the upper side and the lower side of the functional material driving rod.
In some embodiments, the functional material driving body upper cover plate is provided with screw threads in an extending manner, and the screw threads are matched with threaded holes of the upper end cover of the sound radiation shell;
The upper cover plate of the functional material driving body is screwed into the upper end cover of the sound radiation shell through the threaded hole.
In some embodiments, the upper cover plate of the functional material driving body is provided with signal wire threading holes which are uniformly distributed, and the number of the signal wire threading holes is more than or equal to 2.
In some embodiments, the signal wire threading aperture has a diameter of 1mm.
In some embodiments, the functional material driving body lower cover plate is in a frustum shape, and the frustum of the functional material driving body lower cover plate is matched with the through hole of the acoustic radiation shell lower end cover;
And (3) gluing the lower cover plate of the functional material driving body and then fixing the lower cover plate in the through hole of the lower end cover of the sound radiation shell.
In some embodiments, the diameter of the through hole of the lower end cover of the sound radiating shell is 0.1mm larger than the diameter of the lower cover plate of the functional material driving body.
In some embodiments, the primary and secondary acoustic radiating panels may have the same or different bend radii, wall thicknesses, widths, and materials.
Compared with the prior art, the invention has the following beneficial effects:
The invention can increase the number of low-frequency resonance peaks of the bending transducer through the first-stage acoustic radiating plates and the second-stage acoustic radiating plates which are arranged in a staggered way, further increase the working bandwidth to integrally enhance the low-frequency emission capability in the working frequency band, and the connection of the acoustic radiating shell and the functional material driving body to enlarge the working depth range of the bending transducer and reduce the volume and the weight of the low-frequency broadband transducer, thereby reducing the manufacturing cost of the low-frequency broadband transducer.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a multi-plate shell flextensional transducer structure according to the present invention;
FIG. 2 is a longitudinal cross-sectional view of a multi-plate shell flextensional transducer housing of the present invention;
FIG. 3 is a radial cross-sectional view of a multi-plate shell flextensional transducer housing of the present invention;
FIG. 4 is a comparison of the transmit voltage response of a multi-plate case flextensional transducer of the present invention with a conventional flextensional transducer;
FIG. 5 is a 550Hz axial radiation directivity pattern of a multi-plate shell flextensional transducer of the present invention;
FIG. 6 is a plot of the axial radiation directivity of a multi-plate shell flextensional transducer 1450Hz in accordance with the present invention.
Reference numerals in the drawings:
The sound radiation housing 100, the primary sound radiation plate 1, the secondary sound radiation plate 2, the sound radiation housing upper end cover 3, the sound radiation housing lower end cover 4, the functional material driving body 200, the functional material driving body upper cover plate 21, the functional material driving body lower cover plate 22 and the functional material driving rod 23.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Examples
According to the multi-plate shell flextensional transducer provided by the invention, as shown in fig. 1-3, the transducer comprises an acoustic radiation shell 100 and a functional material driving body 200, wherein the functional material driving body 200 is connected in an inner cavity of the acoustic radiation shell 100;
The acoustic radiation housing 100 includes a primary acoustic radiation plate 1, a secondary acoustic radiation plate 2, an acoustic radiation housing upper end cover 3, and an acoustic radiation housing lower end cover 4, where the primary acoustic radiation plate 1 and the secondary acoustic radiation plate 2 are alternately staggered in a circular or polygonal shape and arranged between the acoustic radiation housing upper end cover 3 and the acoustic radiation housing lower end cover 4. The primary acoustic radiation plate 1 is connected to the outer sides of the acoustic radiation shell upper end cover 3 and the acoustic radiation shell lower end cover 4, the secondary acoustic radiation plate 2 is connected to the inner sides of the acoustic radiation shell upper end cover 3 and the acoustic radiation shell lower end cover 4, and the primary acoustic radiation plate 1 and the secondary acoustic radiation plate 2 are driven to be arranged in a staggered mode.
The functional material driving body 200 includes a functional material driving body upper cover plate 21, a functional material driving body lower cover plate 22, and functional material driving rods 23, and the functional material driving body upper cover plate 21 and the functional material driving body lower cover plate 22 are respectively connected to the upper and lower sides of the functional material driving rods 23. The upper cover plate 21 of the functional material driving body is provided with screw threads in an extending manner, and the screw threads are matched with threaded holes of the upper end cover 3 of the sound radiation shell. The upper cover plate 21 of the functional material driving body is provided with 2 signal wire threading holes which are uniformly distributed, and the diameter of each signal wire threading hole is 1mm. The lower cover plate 22 of the functional material driving body is in a frustum shape, the frustum of the conical shape of the lower cover plate 22 of the functional material driving body is matched with the through hole of the lower end cover 4 of the sound radiation shell, and the diameter of the through hole of the lower end cover 4 of the sound radiation shell is 0.1mm larger than that of the lower cover plate 22 of the functional material driving body. The lower cover plate 22 of the functional material driving body is fixed in the through hole of the lower end cover 4 of the sound radiation shell after being coated with 618 epoxy glue, and then the upper cover plate 21 of the functional material driving body is screwed into the upper end cover 3 of the sound radiation shell through the threaded hole.
The working principle is that when the functional material driving rod 23 is electrified to work, the functional material driving body upper cover plate 21 and the functional material driving body lower cover plate 22 respectively push the sound radiation shell upper end cover 3 and the sound radiation shell lower end cover 4 to vibrate, so that the primary sound radiation plate 1 and the secondary sound radiation plate 2 are driven to bend and deform to generate low-frequency sound waves.
More specifically, the functional material driving rod 23 is made of p8 or p4 piezoelectric functional material. The primary acoustic radiation plate 1 adopts 8 LY12 aluminum materials with the bending radius of 600mm and the wall thickness of 3mm, and the secondary acoustic radiation plate 2 adopts 8 60Si2Mn steel materials with the bending radius of 300mm and the wall thickness of 5 mm. Thereby, the diameter of the multi-plate shell bending transducer is 100mm, the height is 280mm, and the weight is 4kg. As shown in fig. 4-6, the invention is set to be a novel flextensional transducer, and the range of the radiation-saving direction is wide from the interval of 550HZ-1450HZ, wherein the response curve of the emission voltage is higher than that of a classical flextensional transducer. The invention can widen the working frequency band of the flextensional transducer, increase the low-frequency emission capability of the flextensional transducer, reduce the size and weight of the low-frequency broadband transducer and increase the underwater working depth of the flextensional transducer, so that the manufacturing cost of the low-frequency broadband transducer is greatly reduced.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210569507.3A CN115134705B (en) | 2022-05-24 | 2022-05-24 | Multi-plate and shell flexural transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210569507.3A CN115134705B (en) | 2022-05-24 | 2022-05-24 | Multi-plate and shell flexural transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115134705A CN115134705A (en) | 2022-09-30 |
| CN115134705B true CN115134705B (en) | 2025-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210569507.3A Active CN115134705B (en) | 2022-05-24 | 2022-05-24 | Multi-plate and shell flexural transducer |
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| CN (1) | CN115134705B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20250079394A (en) * | 2023-11-27 | 2025-06-04 | 국방과학연구소 | Multi-resonance Flextensional Low Frequency Acoustic Projector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112954543A (en) * | 2021-01-22 | 2021-06-11 | 哈尔滨工程大学 | Double-end slotted piezoelectric circular ring underwater acoustic emission transducer |
| CN113301477A (en) * | 2021-04-20 | 2021-08-24 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Array arrangement system of flextensional transducer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6278658B1 (en) * | 1999-03-25 | 2001-08-21 | L3 Communications Corporation | Self biased transducer assembly and high voltage drive circuit |
| US6643222B2 (en) * | 2002-01-10 | 2003-11-04 | Bae Systems Information And Electronic Systems Integration Inc | Wave flextensional shell configuration |
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2022
- 2022-05-24 CN CN202210569507.3A patent/CN115134705B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112954543A (en) * | 2021-01-22 | 2021-06-11 | 哈尔滨工程大学 | Double-end slotted piezoelectric circular ring underwater acoustic emission transducer |
| CN113301477A (en) * | 2021-04-20 | 2021-08-24 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Array arrangement system of flextensional transducer |
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| Publication number | Publication date |
|---|---|
| CN115134705A (en) | 2022-09-30 |
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