CN110058246A - A kind of Miniaturized low-frequency underwater acoustic transducer - Google Patents
A kind of Miniaturized low-frequency underwater acoustic transducer Download PDFInfo
- Publication number
- CN110058246A CN110058246A CN201910388682.0A CN201910388682A CN110058246A CN 110058246 A CN110058246 A CN 110058246A CN 201910388682 A CN201910388682 A CN 201910388682A CN 110058246 A CN110058246 A CN 110058246A
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- terfenol
- bar
- magnetostrictive rod
- underwater acoustic
- acoustic transducer
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- 229910001329 Terfenol-D Inorganic materials 0.000 claims abstract description 39
- 230000005855 radiation Effects 0.000 claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 230000036316 preload Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of Miniaturized low-frequency underwater acoustic transducers, including horizontal magnetic telescopic driver, acoustic radiation panel, driving switching mechanism；Horizontal magnetic telescopic driver includes shell, the coil being set in shell in left-right direction, stator, the Terfenol-D magnetostrictive rod being arranged in stator, the preload force mechanisms for being connected to Terfenol-D magnetostrictive rod both ends and the drive rod that is used as power that can be stretched along axial deformation；Coil is for providing external magnetic excitation field when passing through alternating current excitation signal for Terfenol-D magnetostrictive rod, to drive Terfenol-D magnetostrictive rod flexible along the axial deformation generated forward or backwards；Driving switching mechanism is used to amplify the axial displacement for the drive rod that is used as power, and is converted into the displacement of acoustic radiation panel along the vertical direction.A kind of Miniaturized low-frequency underwater acoustic transducer of the present invention can increase the length of magnetostrictive rod as much as possible within the scope of lesser thickness space, to reduce the effective working frequency of magnetic telescopic driver using horizontal type structure.
Description
Technical field
The present invention relates to a kind of Miniaturized low-frequency underwater acoustic transducers.
Background technique
With development of the different types of underwater acoustic emission transducer over more than 70 years, the frequency coverage of water acoustic emission signal
Range from 10Hz to 100MHz.Currently, 10KHz low-frequency high-power underwater sound transmitting transducer below is a research hotspot,
This energy converter can be used for seabed and bury target acquisition, navigation, Underwater Target Detection.It is this to meet different working conditions
Transmitting transducer should have the features such as frivolous easy to carry, output power is larger, and can easily cover be mounted on it is curved
On bent outer surface.
In current underwater emission energy converter, work is mainly in the energy converter in 1KHz~100KHz frequency range
Tonpilz type energy converter and 1-3 type piezo-electricity composite material energy converter.Tonpilz type energy converter is that a kind of typical longitudinal vibration formula is multiple
Stick PZT (piezoelectric transducer) is closed, its main feature is that the single side radiation with high power capacity, radiating surface is smaller, and vibration mode is single；Work
For frequency generally in 10KHz~50KHz, thickness generally has tens cm thicks, and weighs several kilograms.1-3 type piezo-electricity composite material changes
Piezoelectric ceramics stick is buried using injection molding process and is fabricated in the polymer by energy device, can be made into curve form, and acoustic resistance
Anti- to match with water phase, thickness is about 10mm when design frequency is lower than 100kHz, but its performance is by the elasticity of ceramics and polymer
Number, the segmentation of the ratio of width to height of material, the volume of piezoelectric ceramics, piezoelectric ceramics stick the factors such as arrangement mode influence, and the transducing
The complex process of device, it is expensive.
In underwater acoustic transducer design process, low-frequency high-power work is that a pair of of opposition is existing difficult with Miniaturization Design
Topic.
Summary of the invention
The object of the present invention is to provide a kind of Miniaturized low-frequency underwater acoustic transducer, thinner thicknesses, and are reducing energy converter
While thickness, increase radiating surface area to greatest extent, enhances energy converter underwater sound radiation efficiency.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of Miniaturized low-frequency underwater acoustic transducer, including horizontal magnetic telescopic driver, it is set to the horizontal magnetostriction driving
Acoustic radiation panel above device, the driving being connected between the acoustic radiation panel and horizontal magnetic telescopic driver conversion
Mechanism；
The horizontal magnetic telescopic driver includes that shell, the coil being set in the shell in left-right direction, fixation are worn
Stator in the coil, can along the Terfenol-D magnetostrictive rod being arranged in the stator that axial deformation stretches,
It is connected to the preload force mechanisms of Terfenol-D magnetostrictive rod one end, one end is connected to the Terfenol-D mangneto and stretches
The drive rod that is used as power of the contracting stick other end；
The coil, it is external sharp for being provided when passing through alternating current excitation signal for the Terfenol-D magnetostrictive rod
Exciting field, to drive the Terfenol-D magnetostrictive rod flexible along the axial deformation generated forward or backwards；
The driving switching mechanism for amplifying the axial displacement of the drive rod that is used as power, and is converted into the acoustically radiating
Penetrate the displacement of panel along the vertical direction.
Preferably, it is described pre-tighten force mechanisms include fixing end, movable end, more valves it is along the circumferential direction circular be set to it is described solid
Determine the elastic valve between ring and the movable end, the both ends of elasticity valve described in every valve respectively with the fixing end and the activity
End connection, the movable end are connect with one end of the Terfenol-D magnetostrictive rod, and the fixing end is pierced by the coil
And it is fixedly connected on the housing.
It is highly preferred that the circular center line of elasticity valve described in more valves coaxially prolongs with the Terfenol-D magnetostrictive rod
It stretches.
It is highly preferred that the circular radius of elasticity valve described in more valves is along the direction close to the Terfenol-D magnetostrictive rod
It is gradually reduced.
Preferably, the driving switching mechanism includes that lower end the first bar hingedly on the housing, one end are connected to institute
The second bar of the first bar upper end is stated, the acoustic radiation panel is connected on the other end of second bar, described to make power drive
The other end of bar is connected on first bar by the first fulcrum, and first bar extends along the vertical direction, second bar
It is horizontally extending.
It is highly preferred that the Terfenol-D magnetostrictive rod is parallel to second bar, first fulcrum is to described
The distance of first bar lower end is L1, and the distance of first fulcrum to first bar upper end is L2, the length of second bar
For L3, wherein L3/L1 > 1.
It is highly preferred that the other end of second bar is connect by the second fulcrum with the acoustic radiation panel, described second
Fulcrum is located at the center of the acoustic radiation panel.
Preferably, the acoustic radiation panel is carbon fiber board, aluminium alloy plate or sheet metal.
Preferably, the preload force mechanisms are made of copper product, Steel material or PVC plastic.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages: the present invention is a kind of small
Type low-frequency underwater acoustic transducer carries out horizontal transducer designs based on Terfenol-D magnetostriction materials, to realize small-sized
Change the design of low-frequency underwater acoustic transducer；In order to be reduced as far as material thickness, magnetic telescopic driver uses horizontal type structure, and
The lateral displacement of magnetostrictive rod is converted to the length travel of acoustic radiation panel by driving switching mechanism, is reducing energy converter
While thickness, increase radiating surface area to the maximum extent, enhances energy converter underwater sound radiation efficiency；Due to magnetic telescopic driver
Working frequency it is related with the geometric dimension of magnetostrictive rod, under the conditions of identical output power, working frequency is lower, required
The diameter for the magnetostrictive rod wanted and length value are bigger, can be as much as possible in lesser thickness space model using horizontal type structure
In enclosing, increase the length of magnetostrictive rod, to reduce the effective working frequency of magnetic telescopic driver.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of apparatus of the present invention；
Attached drawing 2 is the structural schematic diagram of horizontal magnetic telescopic driver；
Attached drawing 3 is the simulation architecture figure that resonance frequency 300Hz is emulated in embodiment 1 and the measurement knot for measuring resonance frequency 295Hz
Fruit figure；
Attached drawing 4 is the simulation architecture figure that resonance frequency 675Hz is emulated in embodiment 1 and the measurement knot for measuring resonance frequency 676Hz
Fruit figure；
Attached drawing 5 is the simulation architecture figure that resonance frequency 1370Hz is emulated in embodiment 1 and the measurement for measuring resonance frequency 1346Hz
Result figure；
Attached drawing 6 is the simulation architecture figure that resonance frequency 2695Hz is emulated in embodiment 1 and the measurement for measuring resonance frequency 2663Hz
Result figure；
Attached drawing 7 is the frequency response curve figure of three energy converters.
Wherein: 1, horizontal magnetic telescopic driver；11, shell；12, coil；13, stator；14, Terfenol-D mangneto is stretched
Contracting stick；15, force mechanisms are pre-tightened；151, fixing end；152, elastic valve；16, be used as power drive rod；2, acoustic radiation panel；3, it drives
Switching mechanism；31, the first bar；32, the second bar；33, the first fulcrum；34, the second fulcrum；35, hinge.
Specific embodiment
The technical solution of the present invention will be further described below with reference to the accompanying drawings.
Referring to shown in Fig. 1-2, a kind of above-mentioned Miniaturized low-frequency underwater acoustic transducer, including horizontal magnetic telescopic driver 1, set
Acoustic radiation panel 2 above horizontal magnetic telescopic driver 1 is connected to acoustic radiation panel 2 and horizontal magnetic telescopic driver 1
Between driving switching mechanism 3.According to actual needs, acoustic radiation panel 2 can be carbon fiber board, aluminium alloy plate or sheet metal
Deng.
Above-mentioned horizontal magnetic telescopic driver 1 includes shell 11, the coil 12 being set in shell 11 in left-right direction, fixes
The stator 13 being arranged in coil 12, can along axial deformation stretch the Terfenol-D magnetostriction being arranged in stator 13
Stick 14, the preload force mechanisms 15 for being connected to 14 one end of Terfenol-D magnetostrictive rod, one end are connected to Terfenol-D mangneto
The drive rod 16 that is used as power of 14 other end of extension stem.In the present embodiment, the axial line of coil 12 is horizontally extending.Due to
The very high-magnetostriction coefficient that Terfenol-D material has, the energy converter being made into it is big with load, deformation is big, response is fast
The features such as good with low frequency characteristic, the present invention use a kind of novel miniaturization low-frequency underwater acoustic transducer of Terfenol-D design of material,
Suitable for the Underwater Detection operation under different operating conditions.As needed, force mechanisms 15 are pre-tightened by copper product, Steel material or PVC plastic
Etc. being made.Coil 12, Terfenol-D magnetostrictive rod 14, the coaxial extension of the drive rod 16 that is used as power.
Above-mentioned coil 12 is used to provide when passing through alternating current excitation signal for Terfenol-D magnetostrictive rod 14 outer
Portion's excitation field, to drive Terfenol-D magnetostrictive rod 14 flexible along the axial deformation generated forward or backwards.Pass through this
A setting, external magnetic excitation field by the coil 12 of alternating current excitation signal by being provided, different alternating current excitation signals
The different excitation field of product, Terfenol-D magnetostrictive rod 14 generate corresponding dilatation forward or backwards, to drive
The dynamic drive rod 16 that is used as power does axis reciprocating motion, forms alternating excitation power.
Above-mentioned driving switching mechanism 3 is used to amplify the axial displacement for the drive rod 16 that is used as power, and is converted into acoustic radiation
The displacement of panel 2 along the vertical direction.
In the present embodiment, driving switching mechanism 3 include lower end (it is shown in Figure 1, in Fig. 1 it is lower be here under)
The first bar 31, the right end (shown in Figure 1, the right side in Fig. 1 is the right side here) being hinged on shell 11 are connected to the first bar
Second bar 32 of 31 upper ends, acoustic radiation panel 2 are connected to the left end of the second bar 32.Be used as power drive rod right end by first
Point 33 is connected to 31 middle part of the first bar, and the first bar 31 extends along the vertical direction, and the second bar 32 is horizontally extending.First bar 31
Lower end be hinged on shell 11 by hinge 35.
Above-mentioned Terfenol-D magnetostrictive rod 14 is parallel to the second bar 32, i.e., horizontally extending.First fulcrum 33
Distance to 31 lower end of the first bar is L1, and the distance of 33 to the first bar of the first fulcrum, 31 upper end is L2, and the length of the second bar 32 is
L3, wherein L3/L1 > 1.It is arranged by this, the lateral displacement of magnetostrictive rod is not only converted to the vertical of acoustic radiation panel 2
To displacement, while being also exaggerated the displacement.Due to the rotation amplitude very little of the first bar 31, the proportionality coefficient n of displacement equations
≈L3/L1.The left end of second bar 32 is connect by the second fulcrum 34 with acoustic radiation panel 2, and the second fulcrum 34 is located at acoustic radiation face
The center of plate 2.By the driving switching mechanism 3, by Terfenol-D magnetostrictive rod 14 along axial reciprocal telescopic shape
Change is converted into the reciprocating motion of acoustic radiation panel 2 along the vertical direction, to radiative acoustic wave.
Above-mentioned preload force mechanisms 15 include the fixing end 151 positioned at left side, the movable end positioned at right side, more valves circumferentially side
To the circular elastic valve 152 being set between fixed ring and movable end, the both ends of every valve elasticity valve 152 respectively with fixing end
151 connect with movable end, and movable end is connect with the left end of Terfenol-D magnetostrictive rod 14, and fixing end 151 is pierced by coil 12
And it is fixedly connected on 11 left side of shell.In the present embodiment, the circular center line of more valve elasticity valves 152 and Terfenol-D mangneto
Extension stem 14 coaxially extends；The circular radiuses of more valve elasticity valves 152 along the direction close to Terfenol-D magnetostrictive rod 14 by
It is decrescence small；More valve elasticity valves 152 are around composition cone.
The compressive pre-stress mechanism of traditional magnetostriction driver is stretched by being generally made of pre-load nut and spring in mangneto
Contracting stick applies axial prestress along that should change direction, and spring in the long-term use, can be pre-tightened because of stress fatigue
The case where stress variation, while due also to the installation of spring cannot be guaranteed that the axis of spring and the axis of magnetostrictive rod weigh completely
It closes, to the case where unbalance stress occur.When magnetostrictive rod is there are when unbalance stress, even if pretension bolt applies same make
Firmly, the energy converter of same batch production still will appear the difference of actuation performance, not can guarantee process consistency.For this
Situation, apparatus of the present invention by the way that more valve cone elastic constructions are arranged as pretightning force extruded tube, equably cut by cone pipe
The part 6-8 is segmented into as elastic valve 152.When pretightning force extruded tube does not stress, elastic valve 152 is collapsed into cone shape naturally,
When pretightning force extruded tube is by pretightning force, elastic valve 152 is flared out naturally, and avoids being bonded in stator 13.The structure can
To guarantee that the axis of pretightning force extruded tube is overlapped with the axis of magnetostrictive rod, concentricity is guaranteed, when pretightning force is identical
In the case of, the actuation performance of energy converter is also identical.
After applying pretightning force to magnetostrictive rod using pretightning force extruded tube, magnetostrictive rod inside magnetic domain can be made zero
As far as possible along perpendicular to axial stress direction Boulez when magnetic field, under external magnetic excitation field effect, magnetostrictive rod obtains larger
Axial deformation adjust the precompression of magnetostrictive rod to obtain biggish displacement output, the output that driver can be changed is special
Property.
Embodiment 1:
14 diameter phi of Terfenol-D magnetostrictive rod is 10mm, length 8mm；It drives in transformational structure, L1=12mm, L2=
20mm, L3=30mm；Acoustic radiation panel 2 uses with a thickness of 2mm, the sheet metal that diameter is 150mm.Using finite element method to this
After underwater acoustic transducer numerical modeling solve 100Hz-4000Hz frequency range in, the resonance frequency of preceding 4 rank be respectively 300Hz,
675Hz,1370Hz,2695Hz.Super mangneto in 200Hz-4000Hz frequency range is measured using PSV-400 laser vibration measurer to stretch
The resonance frequency of contracting composite intelligent material, the resonance frequency for obtaining preceding 4 rank is respectively 295Hz, 676Hz, 1346Hz, 2663Hz.
Measurement result is almost the same with simulation result, and trend is identical, and as seen in figures 3-6, left figure is simulation architecture figure, and right figure is measurement knot
Fruit figure.
Three energy converters are made using process conditions same as Example 1, respectively measurement transducer surface acceleration, measurement
Transducer frequency response result.From figure 7 it can be seen that using the energy converter resonant operational frequency having the same that same process makes
Rate, the thickness of energy converter are only less than 4cm, and principal resonant frequency band is 1200Hz-1500Hz, meet energy converter low frequency operation application frequency
Band requires.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand the contents of the present invention and be implemented, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the scope of protection of the present invention.
Claims (9)
1. a kind of Miniaturized low-frequency underwater acoustic transducer, it is characterised in that: including horizontal magnetic telescopic driver, set on described horizontal
Acoustic radiation panel above magnetic telescopic driver, be connected to the acoustic radiation panel and the horizontal magnetic telescopic driver it
Between driving switching mechanism；
The horizontal magnetic telescopic driver includes that shell, the coil being set in the shell in left-right direction, fixation are worn
Stator in the coil, can along the Terfenol-D magnetostrictive rod being arranged in the stator that axial deformation stretches,
It is connected to the preload force mechanisms of Terfenol-D magnetostrictive rod one end, one end is connected to the Terfenol-D mangneto and stretches
The drive rod that is used as power of the contracting stick other end；
The coil, it is external sharp for being provided when passing through alternating current excitation signal for the Terfenol-D magnetostrictive rod
Exciting field, to drive the Terfenol-D magnetostrictive rod flexible along the axial deformation generated forward or backwards；
The driving switching mechanism for amplifying the axial displacement of the drive rod that is used as power, and is converted into the acoustically radiating
Penetrate the displacement of panel along the vertical direction.
2. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 1, it is characterised in that: the preload force mechanisms packet
The along the circumferential direction circular elastic valve being set between the fixed ring and the movable end of fixing end, movable end, more valves is included, often
The both ends of elasticity valve described in valve are connect with the fixing end and the movable end respectively, the movable end with it is described
One end of Terfenol-D magnetostrictive rod connects, and the fixing end is pierced by the coil and is fixedly connected on the housing.
3. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 2, it is characterised in that: elasticity valve described in more valves
Coaxially extend around center line with the Terfenol-D magnetostrictive rod.
4. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 2, it is characterised in that: elasticity valve described in more valves
It is gradually reduced around radius along the direction close to the Terfenol-D magnetostrictive rod.
5. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 1, it is characterised in that: the driving switching mechanism
The second bar of first bar upper end, the acoustic radiation are connected to including hinged on the housing the first bar in lower end, one end
Panel is connected on the other end of second bar, and the other end of the drive rod that is used as power is connected to described by the first fulcrum
On first bar, first bar extends along the vertical direction, and second bar is horizontally extending.
6. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 5, it is characterised in that: the Terfenol-D magnetic
Extension stem is caused to be parallel to second bar, the distance of first fulcrum to first bar lower end is L1, first fulcrum
Distance to first bar upper end is L2, and the length of second bar is L3, wherein L3/L1 > 1.
7. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 5, it is characterised in that: second bar it is another
End is connect by the second fulcrum with the acoustic radiation panel, and second fulcrum is located at the center of the acoustic radiation panel.
8. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 1, it is characterised in that: the acoustic radiation panel is
Carbon fiber board, aluminium alloy plate or sheet metal.
9. a kind of Miniaturized low-frequency underwater acoustic transducer according to claim 1, it is characterised in that: the preload force mechanisms by
Copper product, Steel material or PVC plastic are made.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910388682.0A CN110058246B (en) | 2019-05-10 | 2019-05-10 | Miniaturized low-frequency underwater acoustic transducer |
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| CN110058246B CN110058246B (en) | 2024-05-31 |
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| CN203708143U (en) * | 2014-01-14 | 2014-07-09 | 杭州电子科技大学 | Columnar giant magnetostrictive energy harvester |
| CN104056770A (en) * | 2014-06-07 | 2014-09-24 | 杭州电子科技大学 | Sound wave energy converter with directivity |
| CN106558301A (en) * | 2016-11-17 | 2017-04-05 | 哈尔滨工程大学 | Low frequency directivity underwater acoustic transducer |
| CN206286155U (en) * | 2016-12-21 | 2017-06-30 | 江西省建筑科学研究院 | Giant magnetostrictive transducer |
| CN107327464A (en) * | 2017-08-21 | 2017-11-07 | 张亚宁 | Applied to the locking external member of the superpower pretension of bolt or nut |
| CN108286423A (en) * | 2017-12-05 | 2018-07-17 | 北京航空航天大学 | A kind of rock core displacement test system based on magnetostriction acoustic wave transducer |
| CN108495246A (en) * | 2018-04-28 | 2018-09-04 | 苏州静声泰环保科技有限公司 | A kind of point sound source sound-producing device and vocal technique |
| CN108962208A (en) * | 2018-09-01 | 2018-12-07 | 哈尔滨工程大学 | A kind of three lobed flextensional transducers of conformal driving |
| CN210159911U (en) * | 2019-05-10 | 2020-03-20 | 苏州静声泰科技有限公司 | Miniaturized low-frequency underwater acoustic transducer |
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