CN107302323A - Three-dimensional piezoelectric cantilever beam vibrational energy acquisition system - Google Patents
Three-dimensional piezoelectric cantilever beam vibrational energy acquisition system Download PDFInfo
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- CN107302323A CN107302323A CN201710554332.8A CN201710554332A CN107302323A CN 107302323 A CN107302323 A CN 107302323A CN 201710554332 A CN201710554332 A CN 201710554332A CN 107302323 A CN107302323 A CN 107302323A
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- cantilever beam
- acquisition system
- vibrational energy
- permanent magnet
- energy acquisition
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000004146 energy storage Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 2
- 230000005284 excitation Effects 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000009897 systematic effect Effects 0.000 abstract 1
- 230000001133 acceleration Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
The invention discloses a kind of three-dimensional piezoelectric cantilever beam vibrational energy acquisition system, its structure is：Provided with three cantilever beams on right angle pedestal, one be horizontally fixed on pedestal facade；Two other is vertically fixed on the horizontal plane of pedestal, but the working face of two cantilever beams is mutually perpendicular to, the structure composition one bistable walking beam and a monostable walking beam.The free end of every cantilever beam is respectively equipped with three permanent magnets；The upper and lower surface of fixing end is respectively equipped with piezoelectric patches, and the corresponding face polarity of three permanent magnets is identical, mutually exclusive.The present apparatus can gather the vibrational energy on three-dimensional simultaneously, better than the energy acquisition effect of similar mode linear piezoelectric cantilever vibration energy harvester.The dynamic excitation of varying strength is can adapt to simultaneously, and the optimization of output electric energy can be achieved without adjusting systematic parameter.Three-dimensional piezoelectric cantilever beam vibrational energy acquisition system is not only concise in structure, and the environment arbitrary excitation vibration of any direction suitable for change.
Description
Technical field
The invention belongs to technical field of new energy power generation, and in particular to a kind of collection vibrational energy is converted to the dress of electric energy
Put.
Technical background
With the development of microelectric technique and wireless technology, electronic equipment and wireless senser enter small-sized, low-power consumption
The epoch of change.Under normal circumstances, these equipment are all to provide energy, such as Ni-MH battery, lithium polymer battery by battery.
But the defect of battery-powered is, one is that weight and volume is larger, limits small-sized, miniaturization with electric device；Two be to make
With restricted lifetime, it is necessary to frequently change or charge, this is for the wireless senser of awful weather or far zone
Very serious restriction condition.Because the mechanical energy in natural environment can be converted into electric energy by energy collecting device and be stored,
It can pay attention to as a kind of energy-provision way of replacement battery, therefore by more and more extensive.Vibrational energy is also most common in environment
A kind of energy, the oscillation phenomenon in natural environment is ubiquitous, so, the research and development of vibration energy collector turn into new energy
A big focus in research.
In vibration energy collector, the acquisition mode of piezoelectric type vibration energy is more universal, and it is utilizing piezoelectric just
Piezo-electric effect, makes piezo-electric crystal be caused the flowing of internal charge to export electric energy by the effect of extraneous vibration power.Due to
Linear pattern cantilever beam structure can produce the amount of deflection and submissive coefficient of maximum, with relatively low resonant frequency and wider dynamic model
Enclose, at the same possess low structure stiffness, high sensitivity, easily by microfabrication the advantages of, therefore piezoelectric cantilever type vibrational energy
Measuring collector turns into the preferred structure of piezoelectric type vibration energy collecting device.
Traditional linearly or nonlinearly piezoelectric cantilever type vibration energy collector, can only collect the vibration on a direction
Energy, but the vibration in natural environment may be from any direction in three dimensions, this just hinders the form vibrational energy
Measure the practical application of collector.And the proposition of the present invention can just overcome this significant deficiency, make piezoelectric cantilever type vibrational energy
Amount collector is widely used.
The content of the invention
In order to overcome Conventional piezoelectric cantilever beam vibration energy collector can not realize the defect of energy acquisition on three-dimensional,
The present invention proposes a kind of structure of three-dimensional piezoelectric cantilever beam vibrational energy acquisition system, can different directions excitation under energy
It is enough effectively to gather vibrational energy, improve energy converting between mechanical efficiency.
Technical scheme is explained.Three-dimensional piezoelectric cantilever beam vibrational energy acquisition system have right angle pedestal,
Cantilever beam, permanent magnet, piezoelectric patches, regulator rectifier circuit and energy-storage travelling wave tube etc..Provided with three cantilever beams on right angle pedestal,
First outrigger horizontal is fixed on the facade of right angle pedestal, and working face is up-down structure；Second is vertical with the 3rd cantilever beam solid
It is scheduled on the horizontal plane of right angle pedestal, but second is mutually perpendicular to the working face of the 3rd cantilever beam.In the free end of every cantilever beam
First, second, and third permanent magnet is respectively equipped with, be respectively equipped with first on two surfaces up and down of the fixing end of every cantilever beam,
Second and the 3rd piezoelectric patches, piezoelectric patches is 2-3mm apart from the facade or horizontal plane of right angle pedestal.Second permanent magnet and first,
The corresponding face selection polarity identical face of 3rd permanent magnet, makes it produce mutually exclusive power.
The principle of the present invention is that walking beam one end is fixed, and the other end is hanging, constitutes cantilever design.First (left side) and
Magnet on three (right side) two cantilever beams by intermediate cantilever beam upper magnet because being repelled, so the setting structure is into bistable
Walking beam, and second (centre) cantilever beam is similarly subjected to the repulsion of both sides magnet and constitutes monostable walking beam.When system is by outer
During boundary's any direction random vibration, left side and the cantilever beam of right side two can form double around the generation of respective initial rest position
Steady vibration, intermediate cantilever beam vibrates in monostable form.Vibration can cause to be bent above and below each cantilever beam surface so that cantilever beam
Piezoelectric patches deformation on surface, according to direct piezoelectric effect, piezoelectric patches has electric charge generation, passes through regulator rectifier circuit and energy storage member
Part, just can carry out the output and storage of electric energy.
The features of the present invention and beneficial effect are：The method have the characteristics that：(1) three-dimensional can be gathered simultaneously
On vibrational energy；(2) self structure energy loss is very low in gatherer process；(3) hanged better than similar specification linear piezoelectricity
The energy acquisition effect of arm beam vibration energy collecting device；(4) dynamic excitation of varying strength is can adapt to, without adjusting system ginseng
The optimization of output electric energy can be achieved in number.Three-dimensional piezoelectric cantilever beam vibrational energy acquisition system is not only concise in structure, and for
The environment arbitrary excitation vibration of any direction of change, by the monostable triple-beam structure pattern of two bistables and one, in structural parameters
In the case of immobilizing, the present apparatus is placed in multi-dimensional direction vibrational excitation environment, vibrational energy can be effectively obtained and turn
It is changed to electric energy.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the simplification view of z direction structures.
Fig. 3 is x directions excitation acceleration when being respectively 0.05g and 0.5g, and each beam of three-dimensional vibrating energy collecting system is defeated
The voltage waveform gone out.
Fig. 4 is y directions excitation acceleration when being respectively 0.05g and 0.5g, and each beam of three-dimensional vibrating energy collecting system is defeated
The voltage waveform gone out.
Fig. 5 is z directions excitation acceleration when being respectively 0.05g and 0.5g, and each beam of three-dimensional vibrating energy collecting system is defeated
The voltage waveform gone out.
Output voltage waveforms produced by Fig. 3~Fig. 5, are made up of, wherein a, b, c tri- a, b, c, d, e, f6 small figures respectively
When individual small figure represents excitation accelerated speed effective value for 0.05g, the voltage mean-square value that three cantilever beams are exported in X, Y, Z-direction.d、
When tri- small figures of e, f represent excitation accelerated speed effective value for 0.5g, three cantilever beams are square in the voltage of X, Y, Z-direction output
Value.
Embodiment
Technical scheme is described further below in conjunction with accompanying drawing and by embodiment.Three-dimensional piezoelectric cantilever
Beam vibration energy collecting system, its architectural feature is：Provided with three cantilever beams, first cantilever beam 1-1 water on right angle pedestal 4
The flat facade for being fixed on right angle pedestal；Working face is up-down structure；Second cantilever beam 1-2 is vertical with the 3rd cantilever beam 1-3 to be fixed
The horizontal plane of pedestal at right angle, but second and the 3rd the working face of cantilever beam be mutually perpendicular to (such as Fig. 1).Every cantilever beam from
First permanent magnet 2-1, the second permanent magnet 2-2 and the 3rd permanent magnet 2-3 are respectively equipped with by end.In every cantilever beam fixing end
Two working faces are respectively equipped with the first piezoelectric patches 3-1, the second piezoelectric patches 3-2 and the 3rd piezoelectric patches 3-3 up and down, and piezoelectric patches distance is straight
The facade or horizontal plane of angle pedestal are 2-3mm.Electric energy produced by three piezoelectric patches passes through regulator rectifier circuit and energy storage member
Part, carries out the output and storage of electric energy；The second permanent magnet face selection polarity identical corresponding with the first, the 3rd permanent magnet
Face, makes it produce mutually exclusive power (such as Fig. 2).Shape, the size of three cantilever beams are identical；The magnetic induction intensity of three permanent magnets
It is identical.
Spacing between three permanent magnets set is equal, and in the course of the work, the second permanent magnet can not be with first
Permanent magnet and the 3rd permanent magnet are interfered or collided.First is consistent with the rigidity of the 3rd cantilever beam, the second cantilever beam
Rigidity can be adjusted.
Cantilever beam is flake structure, and it is working face to define relatively wide side.First cantilever beam is fixedly mounted on right angle
The vertical guide of pedestal, second and the 3rd the working face of cantilever beam be mutually perpendicular to be fixed on the horizontal plane of right angle pedestal.Three permanent magnetism
Iron is installed in same horizontal line according to left, center, right beam order and placed, and the spacing of permanent magnet needs the concrete structure parameter according to system
(such as cantilever beam size, magnet size) calculates and tests determination.
As embodiment, the second permanent magnet S poles and the first permanent magnet S are extremely corresponding；Second permanent magnet N poles and the 3rd permanent magnet
N is extremely corresponding.The fixing end of three cantilever beams is apart from right angle pedestal metope 2mm.The both sides up and down of each beam are pasted with pressure respectively
Electric piece, piezoelectric patches is connected to lead and exports electric energy.
The material of cantilever beam, structure are consistent.Material is elastomeric silicon steel, is shaped as strip.Parameters of structural dimension is：
Length (not including being fixed on right angle base interior length) 70mm, width 10mm, thickness 0.2mm.
The material of permanent magnet is ferrite lattice, and parameters of structural dimension is：Long 5mm, wide 8mm, high 15mm.Three permanent magnets
Between spacing be 12mm.
The material of piezoelectric patches is PZT-5A, and dimensional parameters are：Long 20mm, wide 8mm, thick 0.3mm.Piezoelectric patches is pasted onto cantilever
Beam surface anchor portion.
Present system device is arranged on actuating vibration table and carries out different directions and intensity excitation experiment, in order to illustrate this hair
Bright implementation result, Fig. 3 to Fig. 5 is given under different excitation acceleration, the output voltage waveforms obtained by the present apparatus.
Fig. 3 be direction of excitation in x-axis direction, (a), (b), (c) 3 figures provide excitation accelerated speed effective value be 0.05g,
The voltage mean-square value V that three cantilever beams are exported in X, Y, Z-directionxrms、VyrmsAnd VzrmsRespectively 0.0222v, 0.0276v and
0.0123v；(d), the excitation accelerated speed effective value that (e), (f) 3 figures are provided is 0.5g, and three cantilever beams are defeated in X, Y, Z-direction
The voltage mean-square value V gone outxrms、VyrmsAnd VzrmsRespectively 0.2433v, 0.2574v and 0.1627v.
Fig. 4 be direction of excitation in y-axis direction, (a), (b), (c) 3 figures provide excitation accelerated speed effective value be 0.05g,
The voltage mean-square value V that three cantilever beams are exported in X, Y, Z-directionxrms、VyrmsAnd VzrmsRespectively 0.0943v, 0.0804v and
0.0325v；(d), the excitation accelerated speed effective value that (e), (f) three figures are provided is 0.5g, and three cantilever beams are defeated in X, Y, Z-direction
The voltage mean-square value V gone outxrms、VyrmsAnd VzrmsRespectively 0.3581v, 0.2826v and 0.2349v.
Fig. 5 is that direction of excitation is in the accelerated speed effective value that z-axis direction, (a), (b) and (c) 3 figures provide excitation
0.05g, the voltage mean-square value V that three cantilever beams are exported in X, Y, Z-directionxrms、VyrmsAnd VzrmsRespectively 0.0326v,
0.0203v and 0.0591v；(d), the accelerated speed effective value that (e), (f) three figures provide excitation is 0.5g, three cantilever beams X,
Y, the voltage mean-square value V of Z-direction outputxrms、VyrmsAnd VzrmsRespectively 0.2414v, 0.1182v and 0.4248v.
It can see from overall output voltage value, three-dimensional energy harvester can realize that the energy on three directions is adopted
Collection.The present apparatus is arranged on by road and waits the occasion with vibrational excitation background, you can vibrational energy collection and machine is realized
Electric energy conversion.
Claims (5)
1. three-dimensional piezoelectric cantilever beam vibrational energy acquisition system, steady with right angle pedestal, cantilever beam, permanent magnet, piezoelectric patches, rectification
Volt circuit and energy-storage travelling wave tube, it is characterised in that：Provided with three cantilever beams, first cantilever beam (1- on right angle pedestal (4)
1) facade of right angle pedestal is horizontally fixed on, working face is up-down structure；Second is vertical with the 3rd cantilever beam (1-2,1-3) fixed
The horizontal plane of pedestal at right angle, but second be mutually perpendicular to the working face of the 3rd cantilever beam, in the free end of every cantilever beam point
Not She You first, second, and third permanent magnet (2-1,2-2,2-3), in two working faces up and down of the fixing end of every cantilever beam
First, second, and third piezoelectric patches (3-1,3-2,3-3) is respectively equipped with, piezoelectric patches is equal apart from the facade or horizontal plane of right angle pedestal
For 2-3mm, the second permanent magnet face selection polarity identical face corresponding with the first, the 3rd permanent magnet makes it produce mutually row
Repulsion.
2. three-dimensional piezoelectric cantilever beam vibrational energy acquisition system according to claim 1, it is characterised in that：Described first with
The rigidity of 3rd cantilever beam is consistent, and the rigidity of the second cantilever beam can be adjusted.
3. three-dimensional piezoelectric cantilever beam vibrational energy acquisition system according to claim 1, it is characterised in that：The setting
Spacing between three permanent magnets is equal, and in the course of the work, the second permanent magnet can not be with the first permanent magnet and the 3rd forever
Magnet is interfered or collided.
4. three-dimensional piezoelectric cantilever beam vibrational energy acquisition system according to claim 1, it is characterised in that：Described three hang
Shape, the size of arm beam are identical；The magnetic induction intensity of three permanent magnets is identical.
5. three-dimensional piezoelectric cantilever beam vibrational energy acquisition system according to claim 1, it is characterised in that：Three pressures
Electric energy produced by electric piece carries out the output and storage of electric energy by regulator rectifier circuit and energy-storage travelling wave tube.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199618A (en) * | 2018-01-08 | 2018-06-22 | 华中科技大学 | A kind of two-way cantilever beam beam type piezoelectric energy gathering apparatus |
| CN108736763A (en) * | 2018-06-14 | 2018-11-02 | 电子科技大学 | A kind of two-way series broadband piezoelectric harvester of parallel circuit |
| CN108832844A (en) * | 2018-08-08 | 2018-11-16 | 中智国联(深圳)科技有限公司 | A kind of direction vibration energy collecting system based on piezoelectric element |
| CN109450293A (en) * | 2018-12-04 | 2019-03-08 | 山东理工大学 | A kind of non-linear piezoelectric generating device towards two-way excitation in length and breadth |
| CN109591525A (en) * | 2018-11-29 | 2019-04-09 | 吉林大学 | A kind of cantilevered many reference amounts independent detection device and detection method |
| CN109936307A (en) * | 2019-04-22 | 2019-06-25 | 清华大学 | A kind of mixed tensor collector |
| CN110138273A (en) * | 2019-05-20 | 2019-08-16 | 山东理工大学 | A kind of non-linear piezoelectric energy trapping device of L beam type magnetic force and method |
| CN111049426A (en) * | 2020-01-15 | 2020-04-21 | 南昌航空大学 | Piezoelectric type multi-direction broadband vibration energy collecting device |
| CN112865600A (en) * | 2020-12-31 | 2021-05-28 | 山西财经大学 | Broadband three-dimensional piezoelectric vibration energy collecting array structure |
| CN112865599A (en) * | 2020-12-31 | 2021-05-28 | 山西财经大学 | Three-dimensional broadband vibration energy acquisition structure based on long thin sheet and rod-shaped combination |
| CN114039507A (en) * | 2021-11-02 | 2022-02-11 | 上海交通大学 | Multi-direction nonlinear broadband piezoelectric energy collecting device utilizing spring kick effect |
| CN114039507B (en) * | 2021-11-02 | 2024-05-28 | 上海交通大学 | Multidirectional nonlinear broadband piezoelectric energy collection device utilizing spring snap effect |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199618A (en) * | 2018-01-08 | 2018-06-22 | 华中科技大学 | A kind of two-way cantilever beam beam type piezoelectric energy gathering apparatus |
| CN108736763A (en) * | 2018-06-14 | 2018-11-02 | 电子科技大学 | A kind of two-way series broadband piezoelectric harvester of parallel circuit |
| CN108832844B (en) * | 2018-08-08 | 2024-03-26 | 北京中微融通科技有限公司 | Bidirectional vibration energy collecting system based on piezoelectric element |
| CN108832844A (en) * | 2018-08-08 | 2018-11-16 | 中智国联(深圳)科技有限公司 | A kind of direction vibration energy collecting system based on piezoelectric element |
| CN109591525A (en) * | 2018-11-29 | 2019-04-09 | 吉林大学 | A kind of cantilevered many reference amounts independent detection device and detection method |
| CN109450293A (en) * | 2018-12-04 | 2019-03-08 | 山东理工大学 | A kind of non-linear piezoelectric generating device towards two-way excitation in length and breadth |
| CN109936307A (en) * | 2019-04-22 | 2019-06-25 | 清华大学 | A kind of mixed tensor collector |
| CN110138273A (en) * | 2019-05-20 | 2019-08-16 | 山东理工大学 | A kind of non-linear piezoelectric energy trapping device of L beam type magnetic force and method |
| CN111049426A (en) * | 2020-01-15 | 2020-04-21 | 南昌航空大学 | Piezoelectric type multi-direction broadband vibration energy collecting device |
| CN111049426B (en) * | 2020-01-15 | 2024-05-03 | 南昌航空大学 | Piezoelectric multidirectional and broadband vibration energy collecting device |
| CN112865600A (en) * | 2020-12-31 | 2021-05-28 | 山西财经大学 | Broadband three-dimensional piezoelectric vibration energy collecting array structure |
| CN112865599A (en) * | 2020-12-31 | 2021-05-28 | 山西财经大学 | Three-dimensional broadband vibration energy acquisition structure based on long thin sheet and rod-shaped combination |
| CN114039507A (en) * | 2021-11-02 | 2022-02-11 | 上海交通大学 | Multi-direction nonlinear broadband piezoelectric energy collecting device utilizing spring kick effect |
| CN114039507B (en) * | 2021-11-02 | 2024-05-28 | 上海交通大学 | Multidirectional nonlinear broadband piezoelectric energy collection device utilizing spring snap effect |
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Application publication date: 20171027 |