CN108347195A - A kind of magnet manifold type broadband device for collecting piezoelectric vibration energy - Google Patents
A kind of magnet manifold type broadband device for collecting piezoelectric vibration energy Download PDFInfo
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- CN108347195A CN108347195A CN201810181274.3A CN201810181274A CN108347195A CN 108347195 A CN108347195 A CN 108347195A CN 201810181274 A CN201810181274 A CN 201810181274A CN 108347195 A CN108347195 A CN 108347195A
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- 239000000463 material Substances 0.000 claims abstract description 20
- 230000005291 magnetic effect Effects 0.000 claims description 9
- 230000005294 ferromagnetic effect Effects 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
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- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000005284 excitation Effects 0.000 abstract description 5
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000003306 harvesting Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
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- 230000004048 modification Effects 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910002551 Fe-Mn Inorganic materials 0.000 description 1
- 208000010086 Hypertelorism Diseases 0.000 description 1
- 206010020771 Hypertelorism of orbit Diseases 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
A kind of magnet manifold type broadband device for collecting piezoelectric vibration energy.It includes vibrational structure, outer framework, fastener, cantilever beam, block of piezoelectric material, mass block, cantilever beam magnet piece and auxiliary magnet block；Vibrational structure is vibration source；Outer framework underrun fastener is fixed on vibrational structure surface；Cantilever beam one end is connected in cantilever beam side, and the other end is free end；Block of piezoelectric material is located at the position close to fixing end on cantilever top surface of the beam；Mass block and cantilever beam magnet piece are located at the position close to free end on cantilever beam top and bottom；Auxiliary magnet block is located at the position being located on outer framework bottom surface immediately below cantilever beam magnet piece.Effect of the present invention：It is basic collection of energy structure, additional mass and magnet with cantilever beam, simple in structure, easily designed and making is at low cost.It is coupled with magnet and introduces non-linear force, improve efficiency of energy collection, bigger output power is can get under the conditions of same equal excitation.Conventional method bandwidth is improved, more complicated operating mode is suitable for.
Description
Technical field
The invention belongs to energy conversions and collection technique field, shake more particularly to a kind of magnet manifold type broadband piezoelectricity
Energy collection device.
Background technology
All over the world, the demand of acquisition of information is ubiquitous, is usually incorporated miniaturization computing device daily
In object, to realize the collection and human-computer interaction of information, us are helped to solve some everyday problems with this.Wireless sensor technology
It is a crucial technology herein, the technology is more flexible compared with traditional sensor technology, has without wiring, networking
Free feature.But wireless sensor is usually powered by limited battery source, not only needs frequently to safeguard, but also the place of battery
Reason can also impact environment.For these reasons, wireless sensor is limited in certain occasion large area on-premise networks
Using.
With the continuous decline of electronic product power consumption, and in the prevalence of vibration, vibration energy harvesting technology in environment
Increasingly it is hopeful to be embodied as wireless sensor supply energy.Currently, vibrational energy acquiring technology mainly divides according to operation principle
It is four kinds, is magneto-electric, electrostatic, piezoelectric type, magnetostriction type respectively.Wherein, piezoelectric type power density height, electromechanical transformation effect
Rate is high, is supported without other energy, convenient for miniaturization, therefore the concern being subject in recent years is most.It is utilizing piezoelectric element just
Piezoelectric effect, under the action of extraneous vibrational excitation, piezoelectric element generates mechanically deform, is formed on its surface the heap of positive and negative charge
Product, then the form that power supply unit needs is converted thereof by energy acquisition circuit, have some inventions at present for enhancing energy
Amount collection efficiency, impedance matching, energy management have carried out circuit design.Piezoelectric type vibration energy harvesting technology can divide according to structure
For beam type, disc type, circle cymbal etc..Wherein, beam type is because having simple in structure, small, at low cost, resonant frequency
The advantages that low, amount of deflection is greatly, output is high, becomes the hot spot studied both at home and abroad at present, is with a wide range of applications.
Although existing vibration energy harvesting technology is it has been seen in that the potentiality applied, the technology are limited to environment
Condition.In addition, the vibration source in structure is generally more complicated, vibration performance frequency band is wider and unstable, and traditional cantilever
The frequency band of beam type piezoelectric energy acquiring device is very narrow, this directly limits the electromechanical conversion efficiency of energy accumulator, the limitation of these problems
Piezoelectric type vibration energy collection technology is in the application for low energy-consumption electronic device for electrical domain.
Invention content
To solve the above-mentioned problems, the purpose of the present invention is to provide a kind of magnet manifold type broadband piezoelectric vibration energies
Collection device, the narrow-band for solving the problems, such as cantilever piezoelectric energy gathering apparatus in the prior art, and improve it
Efficiency of energy collection, to provide a kind of broadband, stabilization, efficient power supply technique.
In order to achieve the above object, magnet manifold type broadband device for collecting piezoelectric vibration energy packet provided by the invention
It includes：Vibrational structure, outer framework, fastener, cantilever beam, block of piezoelectric material, mass block, cantilever beam magnet piece and auxiliary magnet block；
Wherein vibrational structure is vibration source, for needing the component for carrying out vibration energy harvesting to provide vibration to be arbitrary；Outer framework is by non-
Ferromagnetic metal is made, and underrun fastener is fixed on the surface of vibrational structure；Cantilever beam is made of non-ferromagnetic metal,
One end is connected to the side of cantilever beam as fixing end, and the other end is free end；Block of piezoelectric material is arranged on cantilever top surface of the beam
Close to the position of fixing end, it is connected with external energy acquisition circuit；Mass block and cantilever beam magnet piece are separately positioned on outstanding
Close to the position of free end on arm top surface of the beam and bottom surface；Auxiliary magnet block is then arranged upper in cantilever beam magnet in outer frame bottom surface
Position immediately below block.
The outer framework is made of the larger non-ferromagnetic metal material of the density including copper, and thickness is more than
10mm。
The fastener uses bolt.
The cantilever beam uses aluminium alloy.
The block of piezoelectric material is using any one of piezoelectric ceramics, thick piezoelectric fibre composite material, Kynoar.
The mass block uses aluminium alloy or acrylic.
The cantilever beam magnet piece is all made of ndfeb magnet with auxiliary magnet block and is made, and cylinder, structure is identical.
Between the cantilever beam magnet and cantilever beam, between block of piezoelectric material and cantilever beam and auxiliary magnet and outline border
It is connected with each other using epoxide-resin glue between frame.
The distance between described cantilever beam magnet piece and auxiliary magnet block are within 20mm.
Magnet manifold type broadband device for collecting piezoelectric vibration energy provided by the invention has the advantages that：
(1) present invention is basic collection of energy structure, additional mass and magnet with cantilever beam, is opened up with other wide band
Method is compared, simple in structure, easily designed and making, at low cost.
(2) present invention couples introducing non-linear force with magnet and substantially increases biography with compared with size non-magnet cantilever beam
The efficiency of energy collection of system method can obtain bigger output power under the conditions of same equal excitation.
(3) present invention couples introducing non-linear force with magnet and substantially increases biography with compared with size non-magnet cantilever beam
The bandwidth of system method is suitable for more complicated operating mode.
Description of the drawings
Fig. 1 is magnet manifold type broadband device for collecting piezoelectric vibration energy structural schematic diagram provided by the invention；
Fig. 2 is magnet manifold type broadband device for collecting piezoelectric vibration energy provided by the invention and single cantilever beam structure
Output power curve figure at different frequencies；
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and function of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in schema then
Draw, when actual implementation kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel
It is likely more complexity.
In order to make the technical solution those skilled in the art can better understand that in the present invention, here to will be detailed below relating to
And technology make an explanation explanation.
As shown in Figure 1, magnet manifold type broadband device for collecting piezoelectric vibration energy provided by the invention includes：Vibration knot
Structure 1, outer framework 2, fastener 3, cantilever beam 4, piezoelectric material 5, mass block 6, cantilever beam magnet piece 7 and auxiliary magnet block 8；Wherein
Vibrational structure 1 is vibration source, for needing the component for carrying out vibration energy harvesting to provide vibration to be arbitrary；Outer framework 2 is by non-ferric
Magnetic metal is made, and generates magnetive attraction to avoid with cantilever beam magnet piece 7 and auxiliary magnet block 8, underrun fastener 3 is fixed
On the surface of vibrational structure 1；Cantilever beam 4 is made of non-ferromagnetic metal, to avoid with cantilever beam magnet piece 7 and auxiliary magnet
Block 8 generates magnetive attraction, and one end is connected to the side of cantilever beam 4 as fixing end, and the other end is free end；Block of piezoelectric material 5 is set
The position close to fixing end on 4 top surface of cantilever beam is set, is connected with external energy acquisition circuit；Mass block 6 and cantilever beam
Magnet piece 7 is separately positioned on the position close to free end on 4 top and bottom of cantilever beam；Auxiliary magnet block 8 is then arranged in outline border
It is located at the position immediately below cantilever beam magnet piece 7 on 2 bottom surface of frame.
The outer framework 2 is made of the larger non-ferromagnetic metal material of the density including copper, and thickness is more than
10mm, it is unsuitable excessively thin.
The fastener 3 uses bolt.
The cantilever beam 4 uses aluminium alloy.
The block of piezoelectric material 5 is using piezoelectric ceramics, thick piezoelectric fibre composite material (MFC), Kynoar
Any one of (PVDF), preferably thick piezoelectric fibre composite material, because its efficiency of energy collection is high, bent, long lifespan.
The mass block 6 uses aluminium alloy or acrylic.
The cantilever beam magnet piece 7 is all made of ndfeb magnet with auxiliary magnet block 8 and is made, cylinder, structure phase
Together, identical using the two polarity and prevent the free end of cantilever beam 4 and the bottom surface of outer framework 2 from fitting and nothing in state is repelled each other
Method separates automatically.
Between the cantilever beam magnet 7 and cantilever beam 4, between block of piezoelectric material 5 and cantilever beam 4 and auxiliary magnet 8
It is connected with each other using epoxide-resin glue between outer framework 2.
The vibration frequency that the relevant parameter of the cantilever beam 4 and mass block 6 can be provided by vibrational structure 1 is designed,
If ωnIt is the vibration frequency that its vibrational energy is more concentrated：
Wherein, E is the Young's modulus of 4 material of cantilever beam, and l is the length of cantilever beam 4, and b is the width of cantilever beam 4, and h is outstanding
The height of arm beam 4, ρ are the density of 4 material of cantilever beam, MtFor the quality of mass block 6.
In addition, the distance between the cantilever beam magnet piece 7 and auxiliary magnet block 8 should not too far, if hypertelorism will
Keep magnetic force too small, preferably within 20mm.Magnetic force size can be estimated by following formula：
Wherein, BrIt is the residual magnetic flux density of cantilever beam magnet piece 7 and auxiliary magnet block 8, AmCantilever beam magnet piece 7 with
Public domain between auxiliary magnet block 8, k are the thickness of magnet, and r is the radius of cantilever beam magnet piece 7 and auxiliary magnet block 8, d
It is the distance between cantilever beam magnet piece 7 and auxiliary magnet block 8, μairIt is the magnetic conductivity of air.
Now magnet manifold type broadband device for collecting piezoelectric vibration energy operation principle provided by the invention is described below：
Using as vibration source vibrational structure 1 generate vibration, from there through outer framework 2 drive other component also together into
Row vibration, in the process, cantilever beam 4 and piezoelectric material 5 will generate deformation with vibration, and alternation electricity is generated by piezoelectric effect
Pressure, then the form that the power supply units such as wireless sensor need is converted thereof by energy acquisition circuit, to be embodied as nothing
Line sensor supplies energy.The resonant frequency of cantilever beam 4 is reduced using mass block 6 simultaneously.Cantilever beam magnet piece 7 and auxiliary magnetic
Magnetive attraction will be generated between iron block 8, because the Interaction Force of magnet is to apart from related, while vibration, distance will be sent out
It is raw to change, it is equivalent to and introduces nonlinear magnetic properties power, can non-linearly change system equivalent stiffness during the work time, to reach
To the advantageous effect for widening band system band, the efficiency of energy collection for improving system.
It is related that Fig. 2 show magnet manifold type broadband device for collecting piezoelectric vibration energy application example provided by the invention
Datagram, to illustrate the advantageous effect of the present apparatus.
About in 25Hz at the excitation energy concentration that vibrational structure 1 provides in the example, outer framework 2 selects brass, thickness
For 10mm, fastener 3 selects M5 bolts, cantilever beam 4 to select T6061 aluminium alloys, size 140*40*1mm, block of piezoelectric material 5
MFC-M8514-P2 materials, mass block 6 is selected to select acrylic material, quality 5.8g, cantilever beam magnet piece 7, auxiliary magnet block 8
The Ru-Fe-Mn magnet of 980 Gauss of surface magnetic flux amount, spacing 15mm is selected to select 3M companies DP460 epoxide-resin glues as fitting
Agent.
From fig. 2 it can be seen that at excitation energy concentration, magnet manifold type broadband piezoelectric vibration provided by the invention
Energy collecting device can obtain the energy of 675 μ W, than the 420 of single beam type broadband device for collecting piezoelectric vibration energy
μ W will improve 60.7%, and the present apparatus can utilize frequency band about from 22.5Hz-27Hz, shake more than single beam type broadband piezoelectricity
The 24-27Hz of energy collection device, broadening 50%, therefore obtain advantageous effect described above.
The principle of the present invention and its effect is only illustrated in above description, and is not intended to limit the present invention.It is any to be familiar with
The personage of this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Therefore,
Such as those of ordinary skill in the art is completed without departing from the spirit and technical ideas disclosed in the present invention
All equivalent modifications or change, should by the present invention claim be covered.
Claims (9)
1. a kind of magnet manifold type broadband device for collecting piezoelectric vibration energy, it is characterised in that：The magnet manifold type is wide
Frequency band device for collecting piezoelectric vibration energy includes：Vibrational structure (1), outer framework (2), fastener (3), cantilever beam (4), piezoresistive material
Expect block (5), mass block (6), cantilever beam magnet piece (7) and auxiliary magnet block (8)；Wherein vibrational structure (1) is vibration source；Outline border
Frame (2) is made of non-ferromagnetic metal, and underrun fastener (3) is fixed on the surface of vibrational structure (1)；Cantilever beam (4) is adopted
It is made of non-ferromagnetic metal, one end is connected to the side of cantilever beam (4) as fixing end, and the other end is free end；Piezoresistive material
Expect that block (5) is arranged on cantilever beam (4) top surface close to the position of fixing end, is connected with external energy acquisition circuit；Quality
Block (6) and cantilever beam magnet piece (7) are separately positioned on the position close to free end on cantilever beam (4) top and bottom；Assist magnetic
The position being located on outer framework (2) bottom surface immediately below cantilever beam magnet piece (7) is then arranged in iron block (8).
2. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Outer framework (2) be made of the larger non-ferromagnetic metal material of density including copper including, thickness is more than 10mm.
3. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Fastener (3) use bolt.
4. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Cantilever beam (4) use aluminium alloy.
5. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Block of piezoelectric material (5) using piezoelectric ceramics, thick piezoelectric fibre composite material, any one of Kynoar.
6. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Mass block (6) use aluminium alloy or acrylic.
7. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Cantilever beam magnet piece (7) be all made of ndfeb magnet with auxiliary magnet block (8) and be made, cylinder, structure is identical.
8. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Cantilever beam magnet (7) and cantilever beam (4) between, between block of piezoelectric material (5) and cantilever beam (4) and auxiliary magnet (8) with
Outer framework is connected with each other using epoxide-resin glue between (2).
9. magnet manifold type broadband device for collecting piezoelectric vibration energy according to claim 1, it is characterised in that：It is described
Cantilever beam magnet piece (7) and the distance between auxiliary magnet block (8) within 20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810181274.3A CN108347195A (en) | 2018-03-06 | 2018-03-06 | A kind of magnet manifold type broadband device for collecting piezoelectric vibration energy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181274.3A CN108347195A (en) | 2018-03-06 | 2018-03-06 | A kind of magnet manifold type broadband device for collecting piezoelectric vibration energy |
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| CN108347195A true CN108347195A (en) | 2018-07-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194086A (en) * | 2018-09-19 | 2019-01-11 | 大连理工大学 | A kind of combined type energy accumulator of non-linear magnetomechanical coupling |
| CN112953303A (en) * | 2021-04-01 | 2021-06-11 | 西华师范大学 | Nonlinear rotation type broadband energy collector |
| CN113992059A (en) * | 2021-10-21 | 2022-01-28 | 上海大学 | Rotary energy acquisition device and tire pressure monitoring system |
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| CN101860262A (en) * | 2010-05-20 | 2010-10-13 | 上海交通大学 | Piezoelectric twin-wafer type MEMS energy collector and preparation method thereof |
| CN106169890A (en) * | 2016-09-13 | 2016-11-30 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Vibration energy collector |
| CN106655886A (en) * | 2016-12-21 | 2017-05-10 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Bistable and dual-mode vibration energy gatherer |
-
2018
- 2018-03-06 CN CN201810181274.3A patent/CN108347195A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860262A (en) * | 2010-05-20 | 2010-10-13 | 上海交通大学 | Piezoelectric twin-wafer type MEMS energy collector and preparation method thereof |
| CN101860262B (en) * | 2010-05-20 | 2012-10-17 | 上海交通大学 | Piezoelectric twin-wafer type MEMS energy collector and preparation method thereof |
| CN106169890A (en) * | 2016-09-13 | 2016-11-30 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Vibration energy collector |
| CN106655886A (en) * | 2016-12-21 | 2017-05-10 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Bistable and dual-mode vibration energy gatherer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194086A (en) * | 2018-09-19 | 2019-01-11 | 大连理工大学 | A kind of combined type energy accumulator of non-linear magnetomechanical coupling |
| CN109194086B (en) * | 2018-09-19 | 2019-12-27 | 大连理工大学 | Nonlinear magnet-machine coupled composite energy harvester |
| CN112953303A (en) * | 2021-04-01 | 2021-06-11 | 西华师范大学 | Nonlinear rotation type broadband energy collector |
| CN113992059A (en) * | 2021-10-21 | 2022-01-28 | 上海大学 | Rotary energy acquisition device and tire pressure monitoring system |
| CN113992059B (en) * | 2021-10-21 | 2024-05-10 | 上海大学 | Rotary energy acquisition device and tire pressure monitoring system |
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