CN207947724U - Enhanced airflow sound-induced vibration excitation device - Google Patents
Enhanced airflow sound-induced vibration excitation device Download PDFInfo
- Publication number
- CN207947724U CN207947724U CN201820336674.2U CN201820336674U CN207947724U CN 207947724 U CN207947724 U CN 207947724U CN 201820336674 U CN201820336674 U CN 201820336674U CN 207947724 U CN207947724 U CN 207947724U
- Authority
- CN
- China
- Prior art keywords
- annular
- ring
- air
- flow
- excitation device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005284 excitation Effects 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000026683 transduction Effects 0.000 abstract 2
- 238000010361 transduction Methods 0.000 abstract 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241001672694 Citrus reticulata Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Landscapes
- Transducers For Ultrasonic Waves (AREA)
Abstract
The utility model relates to an air current piezoelectricity electricity generation technical field particularly, relates to an enhancement mode air current sends sound excitation device, include: the casing and locate ring sound vibration mechanism and the piezoelectricity transduction mechanism in the casing. The ring sound vibration mechanism comprises a micropore flow increasing assembly arranged at an opening part at one end of the shell, a ring-shaped resonant cavity positioned in an inner cavity of the shell, and a central column which is positioned between the micropore flow increasing assembly and the ring-shaped resonant cavity and is coaxial with the ring-shaped resonant cavity; the micropore flow increasing assembly comprises an annular plug and an annular gas channel positioned on the periphery of the annular plug; the annular gas injection channel is communicated with the annular resonant cavity; the end part of the annular resonant cavity, which is opposite to the micropore flow increasing assembly, is provided with an annular wedge, and when airflow passes through the annular air jet passage and then presses the annular wedge, the annular wedge generates audio disturbance to enable air in the annular resonant cavity to enter a resonant state; and a piezoelectric transduction mechanism accommodated in the inner side wall of the cover plate disposed at the opening at the other end of the housing.
Description
Technical field
The utility model is related to air-flow piezoelectricity technical field of power generation, swash in particular to a kind of enhanced air-flow cause sound
Vibrating device.
Background technology
Small-sized piezoelectric transducing head of the vibration source from ambient windstream is a kind of clean renewable sources of energy.Can be various complexity
Electronic system (or microelectronics system) self-powered of application system, or the supplement as other energy.
Currently, using in the piezoelectric energy-conversion device of ambient windstream exciting, one of excitation method is the feedback using resonant cavity
Feature encourages to provide stable sound source.There is following 2 aspects in it：1. it is higher to start speed, because inflow velocity needs
It just will produce the stabilization sound source that piezoelectric energy-conversion device can be driven to generate electricity when reaching higher value so that its application range narrows.Often
Complicated air intake duct device need to be designed, inflow velocity raising is expanded into its use scope.2. sound power of a source is low, because using single
Resonant cavity form improves limitation, to keep the output power of piezoelectric energy-conversion device little to sound power of a source.
Therefore, higher, this low problem of sound power of a source for startup speed, when in order to realize that piezoelectric energy-conversion device vibrates
How larger output power improves the excitation behavior that enhanced air-flow causes acoustic excitation mechanism, reduces and starts speed, improves sound source work(
Rate provides an enhanced air-flow and causes acoustic excitation method, is a critical issue.
Utility model content
The purpose of this utility model is to provide a kind of enhanced air-flow and causes acoustic excitation device, with solve to improve sound power of a source and
Improve piezoelectric energy-conversion mechanism vibrations when output power the technical issues of.
The enhanced air-flow of the utility model causes acoustic excitation device to be realized in：
A kind of enhanced air-flow cause acoustic excitation device, including：Shell and the ring sound vibrating mechanism that is disposed in the housing and
Piezoelectric energy-conversion mechanism；Wherein
Ring sound vibrating mechanism includes set on the micropore flow increasing component of the shell one end opening portion, in the shell
Ring resonator in chamber, and between the micropore flow increasing component and ring resonator and with the ring resonator
The newel of coaxial arrangement；The micropore flow increasing component includes an annular obstruction and the ring jet positioned at the annular obstruction periphery
Road；The ring jet road is connected with ring resonator perforation；The ring resonator and the micropore flow increasing component phase
To end there is annular wedge, at air-flow is by ring jet road backlash pressure ring shape wedge, the annular wedge generates sound
Frequency disturbance makes the air inside ring resonator enter resonant condition；And
Piezoelectric energy-conversion mechanism is contained in the cover board madial wall of the other end opening portion configuration of the shell.
In the utility model preferred embodiment, piezoelectric patches is made using piezoelectricity PZT ceramics in the piezoelectric energy-conversion mechanism,
The piezoelectric patches is located at the bottom of the ring resonator to constitute the rigid plane of ring resonator.
In the utility model preferred embodiment, it is humorous that intrinsic frequency of the piezoelectric patches under the minimum vibration shape is equal to annular
The air resonance frequency for intracavitary of shaking.
In the utility model preferred embodiment, the ring jet road is the air inlet duct of an annular pass-through, the air inlet
The cell wall of slot is connected by one group of gusset with the annular obstruction；And
The internal diameter of the inlet end of the air inlet duct is more than the internal diameter of the outlet side of the air inlet duct.
In the utility model preferred embodiment, the ring jet road is the spaced several of a loop configuration
Air admission hole；
The internal diameter of the inlet end of the air admission hole is more than the internal diameter of the outlet side of the air admission hole.
In the utility model preferred embodiment, between the micropore flow increasing component and the ring resonator there are
Gap；The newel is located at the gap location；And
One end of the newel is fixedly connected to form fixing end with the annular obstruction.
In the utility model preferred embodiment, the movable end of the other end of the newel is extended partially into the ring
In shape resonant cavity.
In the utility model preferred embodiment, the circumferential direction in the gap is provided with several vertical axises or inclined exhaust
Hole.
In the utility model preferred embodiment, the annular wedge is outer chamfer structure；And
The annular wedge is directed at the outlet side in the ring jet road.
The utility model embodiment has the advantages that：The enhanced air-flow of the utility model causes acoustic excitation device,
It is flowed in ring jet road by unstable become a mandarin outside device, spray is formed in the outlet side in ring jet road, by ring
What the outlet side of shape air-jet channel was sent out be injected in the static air in ring resonator front end by when, because of height on the boundary of spray
Contact of the speed stream with quiescent atmosphere, constantly generates vortex, pushes and continue to develop broadening forward.Quilt after jet impulse annular wedge
Separation generates disturbance and forms pneumatic sound source, i.e. edge tones.Edge tones can be with Approximate Equivalent at a sound source of the dipole, dipole
Periodic swinging between sound source can be used as into a pressure source.A part is reflected back outlet side and the newel in ring jet road,
Excite more vortexs.Another part is propagated in annular resonance intracavitary, and is reflected at bottom (rigid plane).Annular is humorous
Intracavitary of shaking exist simultaneously it is positive and negative reinforcement is vibrated if they are with phase to sound wave, that is, form standing wave resonance, annular resonance bottom of chamber
Portion's acoustic pressure is maximum (antinode of pressure wave), can generate the stabilization mainly determined by ring resonator.Through coupling after a period of time
After effect, system reaches stable state.At this point, jet stream periodically vibrates near annular wedge, with maintain edge tones and
The standing wave resonance of annular resonance intracavitary.The acoustic pressure of ring resonator bottom, i.e. exciting force act on piezoelectric energy-conversion mechanism surface,
Drive its vibration, piezoelectric patches that will will produce strain and form voltage.And the presence of newel is on the one hand so that ring jet road goes out
Section between gas end and ring resonator reduces, and air-flow velocity is accelerated；On the other hand so that fluctuation airflow function is in newel
Fully to external reflectance, reduced the interference between air-flow so that mechanical energy is preferably converted to acoustic energy afterwards.
The enhanced air-flow of the utility model causes acoustic excitation device and enhanced air-flow that acoustic excitation method is caused to provide one kind
The air-flow of novel non-activity part causes sound intensity piezo-electric generating forced vibration device, and there is mechanical automodulation air-flow to excite fluid
The forced vibration mechanical system of power sound source；Meet automobile, automatic driving vehicle, weapon application system, space flight and aviation system,
The self-powered demand of application system in the various fields such as robot, city or cell illumination, improves clean regenerative resource, has
There are important theory value and Engineering Guidance meaning.
Description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 shows that a kind of enhanced air-flow that the utility model embodiment is provided causes the first reality of acoustic excitation device
Apply the structural schematic diagram under mode；
Fig. 2 shows a kind of enhanced air-flows that the utility model embodiment is provided to cause bowing for the obstruction of acoustic excitation device
Depending on structural schematic diagram；
Fig. 3 shows that second of a kind of enhanced air-flow cause acoustic excitation device that the utility model embodiment is provided is real
Apply the structural schematic diagram under mode；
Fig. 4 shows that a kind of enhanced air-flow that the utility model embodiment is provided causes the third reality of acoustic excitation device
Apply the structural schematic diagram under mode；
Fig. 5 shows that a kind of enhanced air-flow that the utility model embodiment is provided causes the micropore flow increasing of acoustic excitation device
The overlooking structure diagram of component；
Fig. 6 shows that a kind of enhanced air-flow that the utility model embodiment is provided causes the micropore flow increasing of acoustic excitation device
Overlooking structure diagram under another embodiment of component.
In figure：Shell 100, ring resonator 102, newel 103, obstruction 104, air inlet 105, cover board 109, circle are recessed
Slot 110, gap 112, gas vent 115, annular obstruction 201, ring jet road 202, annular wedge 203, gusset 204, piezoelectricity change
It can mechanism 300.
Specific implementation mode
The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram,
Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.
Refering to Figure 1, the utility model provides a kind of enhanced air-flow cause acoustic excitation device, including：Shell 100
With the ring sound vibrating mechanism and piezoelectric energy-conversion mechanism 300 in shell 100.
Ring sound vibrating mechanism includes set on the micropore flow increasing component in 100 one end open portion of shell, positioned at 100 inner cavity of shell
In ring resonator 102, and between micropore flow increasing component and ring resonator 102 and with ring resonator 102
The newel 103 of coaxial arrangement；Micropore flow increasing component includes an annular obstruction 201 and the ring positioned at 201 periphery of annular obstruction
Shape air-jet channel 202；Ring jet road 202 is connected with the perforation of ring resonator 102；Ring resonator 102 and micropore flow increasing component
Opposite end has annular wedge 203, at air-flow is by 202 backlash pressure ring shape wedge 203 of ring jet road, annular wedge
203 generation audio disturbances make the air inside ring resonator 102 enter resonant condition.
Wherein, annular wedge 203 is outer chamfer structure in the present embodiment；And annular wedge 203 is directed at annular air-jet channel
202 outlet side.
It please refers to shown in Fig. 2, the opening portion of 100 one end of shell of the present embodiment is additionally provided with one and is suitable for supporting the micropore increasing
The obstruction 104 of component is flowed, which is to be milled into knot to two symmetrical planes at 1/2 radius of extension at a center
Structure between obstruction 104 and the madial wall of shell 100 to form the air inlet 105 of narrow shape.Obstruction 104 passes through external screw thread and shell
The opening portion of 100 one end of body connects fixation.
201 centre bit of annular obstruction of micropore flow increasing component, which is equipped with threaded hole and the outside of micropore flow increasing component, spiral shell
Line.It is installed on 100 one end open portion of shell by external screw thread connection.
Ring resonator 102 is the pipe of a both ends open, and length-to-diameter need to be more than 0.5.Front end processes
At wedgelike；Rear end is bonded with piezoelectric energy-conversion mechanism 300, forms semi-enclosed pipe.
Piezoelectric energy-conversion mechanism 300 is contained in 109 madial wall of cover board of the other end opening portion configuration of shell 100.This implementation
Piezoelectric patches is made using piezoelectricity PZT ceramics in the piezoelectric energy-conversion mechanism 300 of example, which is located at the bottom of ring resonator 102
To constitute the rigid plane of ring resonator 102.Intrinsic frequency of the piezoelectric patches under the minimum vibration shape is equal in ring resonator 102
Air resonance frequency.
Specifically, cover board 109 is forge piece of step type structure, there is internal thread in front end, for couple outer housing 100 lateral wall it is outer
Screw thread；There are one circular groove 110, the piezoelectric energy-conversion mechanism 300 for housing part plays the role of positioning for bottom.
Optionally, it please refers to shown in Fig. 3 and Fig. 5, ring jet road 202 is the air inlet duct 2021 of an annular pass-through, should be into
The cell wall of air drain 2021 is connected by one group of gusset 204 with the annular obstruction 201；And the inlet end of air inlet duct 2021 is interior
Diameter is more than the internal diameter of the outlet side of the air inlet duct.
It is also optional, it please refers to shown in Fig. 3 and Fig. 6, ring jet road 202 is the spaced several of a loop configuration
Air admission hole 2022；The internal diameter of the inlet end of air admission hole 2022 is more than the internal diameter of the outlet side of the air admission hole 2022.
When the internal diameter of air inlet duct or the inlet end of air admission hole is more than the internal diameter of outlet side, the small of taper is formed in outlet side
The air outlet structure of flow is conducive to the ring jet road 202 and carries out Flow amplification to small flow high pressure gas, after amplified flow
Gas is sprayed by conical flow ejection end, encourages exit piezoelectric energy-conversion mechanism 300, and internal piezoelectric patches is made to generate Curved
Become, realizes that electric energy converts using direct piezoelectric effect.
There are gaps 112 between micropore flow increasing component and ring resonator 102；The circumferential direction in gap 112 is provided with several vertical
Axis or inclined gas vent 115.
Newel 103 is located at gap 112；And one end of newel 103 is fixedly connected to be formed admittedly with annular obstruction 201
Fixed end.The movable end of the other end of newel 103 is extended partially into ring resonator 102.The newel 103 of the present embodiment is
There are external screw thread in cylindrical structure, one end.The threaded hole for coupling annular obstruction 201 by external screw thread, makes it be installed on annular obstruction
201 centers, and on the central axis in ring resonator 102.
Optionally, it please refers to shown in Fig. 4, newel 103 uses cylindrical structure, also optional, and newel 103 uses
Prism structure, such as but it is limited to hexagonal prisms or eight prisms.It, can at the wedge on newel 103 when designing Ei prism structures
The phenomenon that being detached after the wedge of the realization jet impulse newel 103, further enhances the cyclonic effect of air-flow.
Specifically, the enhanced air-flow of the present embodiment causes the specific implementation principle of acoustic excitation device as follows：Outside shell 100
Air-flow be mostly laminar flow, turn rapidly to twist as turbulent flow by air inlet 105, using ring jet road 202 in ring resonator
Spray is formed in 102, spray is met by air static with intracavitary when ring resonator 102, because of high speed on the boundary of spray
The contact with quiescent atmosphere is flowed, vortex and obscission occurs, pushes and continue to develop broadening forward.Jet impulse annular wedge
It is detached after 203, generates disturbance and form pneumatic sound source, i.e. edge tones.Edge tones can with Approximate Equivalent at a sound source of the dipole,
Periodic swinging between sound source of the dipole can be used as into a pressure source.A part is reflected back the outlet side in ring jet road 202
With newel 103, more vortexs are excited.Another part is propagated in ring resonator 102, and at bottom (rigid plane)
It reflects.It exists simultaneously positive and negative to sound wave in ring resonator 102, reinforcement is vibrated if they are with phase, that is, forms standing wave
Resonance, 102 bottom acoustic pressure of ring resonator is maximum (antinode of pressure wave), can generate and mainly be determined by ring resonator 102
Stablize.After coupling after a period of time, system reaches stable state.At this point, jet stream period near annular wedge 203
It vibrates to property, to maintain the standing wave resonance in edge tones and ring resonator 102.The acoustic pressure of 102 bottom of ring resonator, i.e.,
Exciting force acts on 300 surface of piezoelectric energy-conversion mechanism, drives its vibration, piezoelectric patches that will will produce strain and form voltage.
The enhanced air-flow of the utility model causes acoustic excitation device opposite in the inflow velocity of the air-flow outside shell 100
It is relatively low, do not increase complicated inlet structure in the case of, generate can drive piezoelectric energy-conversion mechanism 300 generate electricity stabilization sound source, make
The application range of inflow velocity broadens.Meanwhile newel 103 presence on the one hand so that ring jet road 202 outlet side with
Section between ring resonator 102 reduces, and air-flow velocity is accelerated；On the other hand so that fluctuation airflow function is in newel 103
Fully to external reflectance, reduced the interference between air-flow afterwards so that mechanical energy is preferably converted to acoustic energy, that is, passes through improvement
Enhanced air-flow causes the structure of acoustic excitation mechanism, improves its excitation behavior, achievees the purpose that improve sound power of a source, is conducive to improve
Output power when piezoelectric energy-conversion mechanism 300 is vibrated.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, can also be electrical connection；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
The preferred embodiment that these are only the utility model, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of enhanced air-flow causes acoustic excitation device, which is characterized in that including：Shell (100) and be set to the shell (100)
Interior ring sound vibrating mechanism and piezoelectric energy-conversion mechanism (300)；Wherein
Ring sound vibrating mechanism, including be set to the micropore flow increasing component in the shell (100) one end open portion, be located at the shell
(100) ring resonator in inner cavity (102), and between the micropore flow increasing component and ring resonator (102)
And the newel (103) being coaxially disposed with the ring resonator (102)；The micropore flow increasing component includes an annular obstruction
(201) and positioned at annular obstruction (201) periphery ring jet road (202)；The ring jet road (202) and the annular
Resonant cavity (102) perforation is connected；The ring resonator (102) end opposite with the micropore flow increasing component has annular point
(203) are split, at air-flow is by ring jet road (202) backlash pressure ring shape wedge (203), the annular wedge (203) generates
The air that audio disturbance keeps ring resonator (102) internal enters resonant condition；And
Piezoelectric energy-conversion mechanism (300) is contained in cover board (109) madial wall of the other end opening portion configuration of the shell (100).
2. enhanced air-flow according to claim 1 causes acoustic excitation device, which is characterized in that the piezoelectric energy-conversion mechanism
(300) piezoelectric patches is made using piezoelectricity PZT ceramics, which is located at the bottom of the ring resonator (102) to constitute ring
The rigid plane of shape resonant cavity (102).
3. enhanced air-flow according to claim 2 causes acoustic excitation device, which is characterized in that the piezoelectric patches shakes minimum
Intrinsic frequency under type is equal to the air resonance frequency in ring resonator (102).
4. enhanced air-flow according to claim 1 causes acoustic excitation device, which is characterized in that the ring jet road
(202) it is the air inlet duct (2021) of an annular pass-through, the cell wall of the air inlet duct (2021) passes through one group of gusset (204) and the ring
Shape blocks (201) and is connected；And
The internal diameter of the inlet end of the air inlet duct (2021) is more than the internal diameter of the outlet side of the air inlet duct (2021).
5. enhanced air-flow according to claim 1 causes acoustic excitation device, which is characterized in that the ring jet road
(202) it is spaced several air admission holes (2022) of a loop configuration；
The internal diameter of the inlet end of the air admission hole (2022) is more than the internal diameter of the outlet side of the air admission hole (2022).
6. the enhanced air-flow of any one of them causes acoustic excitation device according to claim 4 or 5, which is characterized in that the micropore
There are gap (112) between flow increasing component and the ring resonator (102)；The newel (103) is located at the gap (112)
Place；And
One end of the newel (103) is fixedly connected to form fixing end with the annular obstruction (201).
7. enhanced air-flow according to claim 6 causes acoustic excitation device, which is characterized in that the newel (103)
The movable end of the other end is extended partially into the ring resonator (102).
8. enhanced air-flow according to claim 7 causes acoustic excitation device, which is characterized in that the week of the gap (112)
To being provided with several vertical axises or inclined gas vent (115).
9. enhanced air-flow according to claim 1 causes acoustic excitation device, which is characterized in that the annular wedge (203)
For outer chamfer structure；And
The annular wedge (203) is directed at the outlet side of the ring jet road (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820336674.2U CN207947724U (en) | 2018-03-12 | 2018-03-12 | Enhanced airflow sound-induced vibration excitation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820336674.2U CN207947724U (en) | 2018-03-12 | 2018-03-12 | Enhanced airflow sound-induced vibration excitation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207947724U true CN207947724U (en) | 2018-10-09 |
Family
ID=63697811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820336674.2U Active CN207947724U (en) | 2018-03-12 | 2018-03-12 | Enhanced airflow sound-induced vibration excitation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207947724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322092A (en) * | 2018-03-12 | 2018-07-24 | 常州机电职业技术学院 | Enhanced airflow sound-induced vibration excitation device and enhanced airflow sound-induced vibration excitation method |
-
2018
- 2018-03-12 CN CN201820336674.2U patent/CN207947724U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322092A (en) * | 2018-03-12 | 2018-07-24 | 常州机电职业技术学院 | Enhanced airflow sound-induced vibration excitation device and enhanced airflow sound-induced vibration excitation method |
| CN108322092B (en) * | 2018-03-12 | 2024-02-20 | 常州机电职业技术学院 | Enhanced airflow induced acoustic excitation device and enhanced airflow induced acoustic excitation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4795428B2 (en) | pump | |
| JP5692468B2 (en) | Blower | |
| US7633175B1 (en) | Resonating blade for electric power generation | |
| CN108459176A (en) | Piezoelectric energy collection structure based on wind induced vibration and self-powered wind speed measurement device and method | |
| ATE370519T1 (en) | PIEZOELECTRIC DRIVE | |
| CN207947724U (en) | Enhanced airflow sound-induced vibration excitation device | |
| CN103203312B (en) | Giant magnetostictive longitudinal-torsional coupled vibration ultrasonic transducer | |
| CN105391345A (en) | Fluid power sound source excitation method of piezoelectric generator | |
| WO2007004180A3 (en) | A reciprocating workpiece device with a drive system seeking the resonance of the driven system portion thereof | |
| US20190024608A1 (en) | Acoustic cavity tailored synthetic jet | |
| CN205304645U (en) | Piezoelectric generator is sent to air current | |
| CN106531140A (en) | Piezoelectric buzzer drive circuit | |
| CN102861693A (en) | Piezoelectric micro-spraying device based on longitudinal vibration sandwich transducer | |
| CN111846266A (en) | Novel multi freedom ultrasonic motor's unmanned aerial vehicle camera cloud platform modular structure | |
| CN107147329A (en) | A kind of acoustic energy retracting device | |
| CN105471319B (en) | A kind of air-flow cause sound piezo-electric generating forced vibration device | |
| CN108322092A (en) | Enhanced airflow sound-induced vibration excitation device and enhanced airflow sound-induced vibration excitation method | |
| CN205349676U (en) | Piezoelectricity micro air pump structure | |
| US20080128527A1 (en) | Liquid dispensing apparatus based on piezoelectrically driven hollow horn | |
| CN208156032U (en) | Piezoelectric energy collecting structure based on wind induced vibration and self-powered wind speed measuring device | |
| CN205430092U (en) | Piezoelectric generator | |
| CN104901584B (en) | A kind of air-flow resonant electrical generation device | |
| CN205249086U (en) | Adopt piezoelectricity cantilever structure's electricity generation cylinder | |
| CN206282605U (en) | A kind of piezo buzzer drive circuit | |
| US2158537A (en) | Sound creating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |