CN108039835B - Self-tuning is the same as the non-linear wideband vibration energy collector combined - Google Patents
Self-tuning is the same as the non-linear wideband vibration energy collector combined Download PDFInfo
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- CN108039835B CN108039835B CN201711467755.2A CN201711467755A CN108039835B CN 108039835 B CN108039835 B CN 108039835B CN 201711467755 A CN201711467755 A CN 201711467755A CN 108039835 B CN108039835 B CN 108039835B
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- shaping drum
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- energy collector
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- 238000007493 shaping process Methods 0.000 claims abstract description 45
- 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 22
- 239000000463 material Substances 0.000 claims description 8
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007787 solid Substances 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
- H02N2/188—Vibration harvesters adapted for resonant operation
Abstract
The invention discloses a kind of self-tunings with the non-linear wideband vibration energy collector combined, if a L-type pedestal (9), there are vertical edges and horizontal sides, one end of one Rectangular piezoelectric cantilever beam (6) is fixed on edge in the vertical edges of L-type pedestal, the upper surface of the other end is symmetrically fixed with a shaping drum (1), lower surface is fixed with a piezoelectric beam magnet (7), one pedestal magnet (8) is fixed in the horizontal sides of L-type pedestal, it is staggered relatively with piezoelectric beam magnet (7) position, and there is spacing, shaping drum (1) middle position is equipped with a cylinder demarcation plate (5), the both sides of cylinder demarcation plate symmetrically fill that there are two spherical mass blocks (4), each spherical shape mass block connects with one end of a ring spring (3), the other end of ring spring is fixed on a cylinder cover board (2), the cylinder Cover board is fixedly connected with shaping drum (1) end.The device solves the partially narrow disadvantage of existing self-tuning wideband vibrational energy collector frequency band.
Description
Technical field
The present invention relates to a kind of devices of energy technology field more particularly to a kind of self-tuning to combine with non-linear
Wideband vibration energy collector.
Background technique
Vibration is a kind of phenomenon generally existing in environment, is wireless network if converting electric energy for the vibration in environment
The power supply of the low power consuming devices such as network, embedded system, have a very wide range of applications prospect.Vibration in environment is not usually single
Frequency vibration, its frequency content are often distributed in a wider frequency band.In order to obtained from ambient vibration more energy,
Increase the application range of vibration energy collector, it is necessary to develop the vibration energy collector with broadband properties.
The method for realizing wideband vibration energy acquisition at present has: nonlinear method, impaction, tuning method, multi-modal method, raising frequency
Method etc..These methods respectively have advantage and disadvantage, there is certain limitation.Also scheme adopts two or more wideband vibration energies
Mode set combination, constitutes the wideband vibration energy collector of combined type, it will the bandwidth for further widening collector improves it and answers
Use range.
The principle of tuning method is by changing the size of mass block, changing the position of stiffness coefficient, change mass block come real
The change of existing resonance frequency.Many research is to realize the change of resonance frequency by changing the position of mass block.Mass block
The change of position can by manually adjusting, motor is adjusted, automatic adjustment (or self-tuning) etc. modes are realized.For the side of manually adjusting
Formula determines that essence or the acquisition of single-frequency vibrational energy can only acquire the vibrational energy of certain single-frequency, if ring once adjusting
Border vibration frequency changes, it is also necessary to manually adjust again, it is clear that adjusts trouble, application range is relatively narrow.Motor regulative mode can root
It realizes and automatically adjusts according to environmental frequencies, but this mode needs to increase frequency check circuit and circuit for controlling motor, structure is complicated,
Certain energy can be consumed when adjusting mass block simultaneously, reduces energy acquisition efficiency.Self-tuning mode does not need extraneous application
Energy does not need additionally to increase control circuit yet, and the position of mass block can be automatically adjusted according to environmental vibration frequency, realizes wideband
Vibrational energy acquisition, has more advantage.
After searching and discovering the prior art, Chinese Patent Application No. 201410613453.1, title are as follows: with movable
The broadband piezoelectric type vibration electricity energy harvester of quality loop, the invention propose a kind of self-tuning wideband vibration energy acquisition
Device.The collector is made of spring beam, piezoelectric element, slideway, limited block and movable quality loop.Spring beam is hanging, both ends
Face is fixed, and piezoelectric element is tightly attached to spring beam surface and the fixing end close to spring beam, and slideway is located at the middle position of spring beam,
Limited block is located at slideway both ends and is fixed on spring beam, and movable quality loop passes through slideway and spring beam and is freely hanging at cunning
On road.The change of position is realized in the movements such as sliding and rotation that movable quality loop generates under the action of external vibration, is not needed outer
Boundary applies energy, can automatically adjust, and realizes wideband vibration energy acquisition.But the frequency band of collector acquisition is also partially narrow, it is necessary to
Further increase the bandwidth of collector.
Summary of the invention
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of broader self-tuning wideband vibrational energy of frequency band and adopts
Storage solves the partially narrow disadvantage of existing self-tuning wideband vibrational energy collector frequency band.
To achieve the above object, the invention proposes a kind of self-tunings with the non-linear wideband vibration energy acquisition combined
Device, structure are as follows:
Self-tuning is the same as the non-linear wideband vibration energy collector combined, it is characterised in that: sets a L-type pedestal, has vertical
Straight flange and horizontal sides, one end of a Rectangular piezoelectric cantilever beam are fixed on edge in the vertical edges of L-type pedestal, and the upper surface of the other end is solid
Surely there is a shaping drum, lower surface is fixed with a piezoelectric beam magnet, and a pedestal magnet is fixed in the horizontal sides of L-type pedestal, with
Piezoelectric beam magnet positions are staggered relatively, and have spacing, and the shaping drum middle position is equipped with a cylinder demarcation plate, cylinder
The both sides of demarcation plate are symmetrically filled there are two spherical mass block, and each spherical shape mass block connects with one end of a ring spring, ring
The other end of shape spring is fixed on a cylinder cover board, and the cylinder cover board is fixedly connected with one end of shaping drum.
Other schemes include that the piezoelectric beam is formed by three layers of bonding, and outer two layers are the pressure that piezoelectric ceramics is formed
Electric layer, surface cover metal electrode layer, and the voltage output of two piezoelectric layers is to connect in parallel or series, and middle support layer is steel
Or beryllium-bronze.
The piezoelectric cantilever or be bonded on one layer of supporting layer by a lamination electric layer is constituted.
The piezoelectric beam magnet and pedestal magnet to opposite be identical polar or opposite polarity.
The spherical mass block diameter is less than the bore inner diameter of shaping drum, and spherical mass block and cylinder demarcation plate are without appointing
What connection relationship.
The diameter of the ring spring is less than the bore inner diameter of shaping drum.
Shaping drum, ring spring, spherical mass block, cylinder demarcation plate are all made of non-magnet material, spherical mass block choosing
With the big non-magnet material of tungsten or copper isodensity.
The ring central diameter R of the shaping drum is greater than spherical mass block central point to piezoelectric cantilever and fixed device inner edge
Distance L along intersection midpoint.When acquiring ambient vibration energy, the piezoelectric cantilever in collector is with ambient vibration, annular circle
Spherical mass block in cylinder is by the effect by centrifugal force F, F=ω2L, wherein ω is the angular frequency of ambient vibration.Centrifugal force F can
Resolve into normal force FnWith tangential force Ft.Normal force FnPerpendicular, the tangential force F with the ring center circular arc line of shaping drumtWith annular
The ring center circle tangential of cylinder.Normal force FnSpherical mass block is set to be in contact with the inner circle outer wall of shaping drum, annular circle
The inner circle outer wall of cylinder will generate the opposite reaction force of the size same direction, with normal force FnIt balances each other.Tangential force FtMake spherical matter
Gauge block compresses ring spring to movement on the outside of shaping drum.Ring spring can generate a reaction force, when the reaction force with
Tangential force FtWhen equal in magnitude, spherical mass block be will no longer be moved, and be in equilibrium state.
The shaping drum and internal part can be equivalent to a mass block, be fixed on piezoelectric cantilever.Spherical matter
After gauge block is moved to shaping drum outside, the mass center of the equivalent mass block of the components such as shaping drum changes, this is resulted in
The distance for imitating mass center to the piezoelectric cantilever fixing end of mass block will shorten, so that the resonance frequency of piezoelectric cantilever improves.
By formula F=ω2L knows: ambient vibration angular frequency is bigger, and centrifugal force F is bigger, the bigger tangential force F of centrifugal force Ft
Also bigger, the distance of spherical mass block to movement on the outside of shaping drum is bigger, and the resonance frequency of piezoelectric cantilever just becomes to get over
It is high.Therefore, which realizes the automatic tuning of frequency by the position that centrifugal force changes spherical mass block, to realize
Wideband vibration energy acquisition.
In vibration processes, piezoelectric cantilever also by the non-linear magneticaction between piezoelectric beam magnet and pedestal magnet,
The bandwidth of collector can be also further widened using the non-linear magnetic force.
Compared with prior art, double widebands using bent beam multi-direction vibration energy collector the advantages of
In:
(1) present invention adjusts the position of piezoelectric beam equivalent mass block using centrifugal force, realizes the automatic tuning of frequency, is not required to
Want external manual adjustment.And the adjustable distance of equivalent mass block is big, and frequency-tuning range is wide.
(2) non-linear magnetic force can be generated between the piezoelectric beam magnet on piezoelectric cantilever and pedestal magnet, and external linear is shaken
Turn changes Non-Linear Vibration into；This Non-Linear Vibration can make collector obtain broadband properties.Therefore, the present invention incorporates non-thread
Property wide frequency technology and frequency self-tuning technology, so that the bandwidth of collector is further widened.
Detailed description of the invention
Fig. 1 is a kind of self-tuning with the structural schematic diagram of the non-linear wideband vibration energy collector combined；
Fig. 2 is the working principle diagram that collector realizes self-tuning.
Numbering in the drawing title: 1 shaping drum, 2 cylinder cover boards, 3 ring springs, 4 spherical mass blocks, 5 cylinder demarcation plates,
6 piezoelectric beams, 7 piezoelectric beam magnet, 8 pedestal magnet, 9 L-type pedestals, 10 fixed devices.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
The present embodiment is one of scheme structure.
It is fixed in the vertical edges of L-type pedestal 9 as shown in Figure 1, one end of piezoelectric cantilever 6 passes through fixed device 10, separately
The upper surface of one end (free end) is fixed with a shaping drum 1, and lower surface is fixed with a piezoelectric beam magnet 7.Piezoelectric cantilever
Beam 6 is made of three layers of bonding: controlling two layers is piezoelectric layer, and material is piezoelectric ceramics, and surface covers metal electrode layer, two pressures
The voltage output of electric layer is to be connected in parallel or series；Middle support layer is steel, beryllium-bronze elastomeric material, width and piezoelectric layer
Unanimously.Piezoelectric cantilever 6 can also be sticked to middle support layer by a lamination electric layer and constitute.
Shaping drum 1 is symmetrically fixed on the upper surface of 6 free end of piezoelectric cantilever.1 middle position of shaping drum is equipped with
Shaping drum 1 is symmetrically divided into two parts by one cylinder demarcation plate 5.In shaping drum 1, the left and right two of cylinder demarcation plate 5
Successively symmetrically there are two spherical 4, two ring springs 3 of mass block and two cylinder cover boards 2 for dress on side.Two spherical mass blocks 4
Diameter it is identical with material, diameter is slightly less than the bore inner diameter of shaping drum 1.The diameter and material of two ring springs 3 also phase
Together, diameter is also slightly less than the bore inner diameter of shaping drum 1, and 3 annulus central diameter of ring spring is identical as the central diameter of shaping drum 1.Ball
Without any connection relationship, spherical mass block 4 can be fixedly connected with ring spring 3, can also for form quality gauge block 4 and cylinder demarcation plate 5
It is not fixed connection, only heads on spherical mass block 4.Ring spring 3 is fixed on cylinder cover board 2 far from that end of spherical mass block 4.Circle
Cover plate 2 is fixed on the end of shaping drum 1.Shaping drum 1, ring spring 3, spherical mass block 4, cylinder demarcation plate 5 are adopted
With non-magnet material, wherein the non-magnet material that spherical mass block 4 selects tungsten, copper isodensity big.
The ring central diameter R of shaping drum 1 is greater than 4 central point O of spherical mass block3Into piezoelectric cantilever 6 and fixed device 10
Edge intersection midpoint O1Distance L referring to attached drawing 2.When acquiring ambient vibration energy, the piezoelectric cantilever 6 in collector is with ring
Border vibration, spherical mass block 4 in shaping drum 1 is by the effect by centrifugal force F, F=ω2L, wherein ω is ambient vibration
Angular frequency, the direction of centrifugal force F is by O1It is directed toward 4 central point O of spherical mass block3.Centrifugal force F is decomposed into normal force FnWith it is tangential
Power Ft.Normal force FnPerpendicular, the tangential force F with the center circular arc line 11 of shaping drum 1tWith the center circular arc line 11 of shaping drum 1
It is tangent.Normal force FnSpherical mass block 4 is set to be in contact with the inner circle outer wall of shaping drum 1 the A point in its contact point attached drawing 2,
The inner circle outer wall of shaping drum 1 will generate the opposite reaction force of the size same direction, with normal force FnIt balances each other.Tangential force Ft
Make spherical mass block 4 to moving on the outside of shaping drum 1, compresses ring spring 3.Ring spring 3 can generate a reaction force, when
The reaction force and tangential force FtWhen equal in magnitude, spherical mass block 4 be will no longer be moved, and be in equilibrium state.Shaping drum 1 and
Internal part can be equivalent to a mass block and be fixed on piezoelectric cantilever 6.Spherical mass block 4 is to moving on the outside of shaping drum 1
Afterwards, the mass center of the equivalent mass block of the components such as shaping drum 1 changes, it may be assumed that the mass center of equivalent mass block to piezoelectric cantilever 6
The distance of fixing end will shorten, so that the resonance frequency of piezoelectric cantilever 6 improves.
By formula F=ω2L knows: ambient vibration angular frequency is bigger, and centrifugal force F is bigger, the bigger tangential force F of centrifugal force Ft
Also bigger, spherical mass block 4 is bigger to the distance moved on the outside of shaping drum 1, and the resonance frequency of piezoelectric cantilever 6 just becomes
It is higher.Therefore, which realizes the self-tuning of frequency by the position that centrifugal force changes spherical mass block 4, realizes width
Frequency vibration energy acquisition.
Pedestal magnet 8 is fixed on the pedestal immediately below piezoelectric beam magnet 7.Between pedestal magnet 8 and piezoelectric beam magnet 7 away from
From setting one it is suitable with a distance from.In vibration processes, piezoelectric cantilever 6 is by non-thread between piezoelectric beam magnet 7 and pedestal magnet 8
The effect of property magnetic force, the bandwidth of collector can be also further widened using the non-linear magnetic force.
Therefore collector be provided simultaneously with frequency self-tuning and non-linear broadband properties, the wideband collector with single mode
It compares, the present invention can obtain broader bandwidth.
Claims (7)
1. self-tuning is the same as the non-linear wideband vibration energy collector combined, it is characterised in that: set a L-type pedestal (9), have vertical
Straight flange and horizontal sides, one end of a Rectangular piezoelectric cantilever beam (6) are fixed on edge in the vertical edges of L-type pedestal, the upper table of the other end
Face is symmetrically fixed with a shaping drum (1), and lower surface is fixed with a piezoelectric beam magnet (7), and a pedestal magnet (8) is fixed on L
It is staggered relatively with piezoelectric beam magnet (7) position in the horizontal sides of type pedestal, and there is spacing, the shaping drum (1) is intermediate
Position be equipped with a cylinder demarcation plate (5), the both sides of cylinder demarcation plate symmetrically fill there are two spherical shape mass block (4), each spherical shape
Mass block connects with the one end of a ring spring (3), and the other end of ring spring is fixed on a cylinder cover board (2), described
Cylinder cover board be fixedly connected with shaping drum (1) end.
2. self-tuning according to claim 1 is the same as the non-linear wideband vibration energy collector combined, it is characterised in that:
The piezoelectric cantilever (6) is formed by three layers of bonding, and outer two layers are the piezoelectric layer that piezoelectric ceramics is formed, surface covering gold
Belong to electrode layer, the voltage output of two piezoelectric layers is to connect in parallel or series, and middle support layer is steel or beryllium-bronze.
3. self-tuning according to claim 2 is the same as the non-linear wideband vibration energy collector combined, it is characterised in that:
The piezoelectric cantilever is bonded on one layer of supporting layer and is constituted by a lamination electric layer.
4. self-tuning according to claim 1 is the same as the non-linear wideband vibration energy collector combined, it is characterised in that:
Shaping drum, ring spring, spherical mass block, cylinder demarcation plate are all made of non-magnet material.
5. self-tuning according to claim 1 is the same as the non-linear wideband vibration energy collector combined, it is characterised in that:
The diameter of the spherical mass block is less than shaping drum diameter of bore, and spherical mass block and cylinder demarcation plate are without any connection
Relationship.
6. self-tuning according to claim 1 is the same as the non-linear wideband vibration energy collector combined, it is characterised in that:
The piezoelectric beam magnet (7) and pedestal magnet (8) to opposite be identical polar or opposite polarity.
7. self-tuning according to claim 1 is the same as the non-linear wideband vibration energy collector combined, it is characterised in that:
The outer diameter of ring spring (3) is less than shaping drum (1) diameter of bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711467755.2A CN108039835B (en) | 2017-12-29 | 2017-12-29 | Self-tuning is the same as the non-linear wideband vibration energy collector combined |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711467755.2A CN108039835B (en) | 2017-12-29 | 2017-12-29 | Self-tuning is the same as the non-linear wideband vibration energy collector combined |
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| CN108039835B true CN108039835B (en) | 2019-08-30 |
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| KR102125405B1 (en) * | 2018-08-29 | 2020-06-22 | 한국과학기술연구원 | Self-resonance tuning piezoelectric energy harvester with broadband operation frequency |
| CN109538682A (en) * | 2018-12-28 | 2019-03-29 | 上海大学 | A kind of elastic construction equipment for inhibiting of vibration |
| CN110107650B (en) * | 2019-04-18 | 2021-06-01 | 浙江吉利控股集团有限公司 | Dual-mass flywheel and automobile |
| CN111293924B (en) * | 2020-02-25 | 2023-02-24 | 天津大学 | Piezoelectric type random direction vibration energy collector |
| CN113556060B (en) * | 2021-08-31 | 2022-05-10 | 合肥工业大学 | Enhanced ultra-multi-stable-state broadband vibration energy collecting device |
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| KR101478446B1 (en) * | 2013-06-24 | 2015-01-08 | 중앙대학교 산학협력단 | Energy harvester using large-amplitude vibration |
| CN104113232B (en) * | 2014-07-11 | 2016-05-25 | 西安电子科技大学 | A kind of wind-induced vibration formula piezoelectric generator |
| CN106357154B (en) * | 2016-09-08 | 2018-03-06 | 西安电子科技大学 | Multi-arm coupled mode collision type piezoelectric energy collecting device |
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