CN107395063A - Energy collecting device - Google Patents
Energy collecting device Download PDFInfo
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- CN107395063A CN107395063A CN201710823070.0A CN201710823070A CN107395063A CN 107395063 A CN107395063 A CN 107395063A CN 201710823070 A CN201710823070 A CN 201710823070A CN 107395063 A CN107395063 A CN 107395063A
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- cantilever beam
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- fixed part
- collecting device
- energy collecting
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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 9
- 230000006698 induction Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 241000446313 Lamella Species 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance 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
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The present invention provides a kind of energy collecting device, including piezoelectric vibrator and pedestal, wherein, piezoelectric vibrator is comb teeth shape, including fixed part and overarm portion, fixed part one end are fixed on pedestal, and the other end is fixedly connected with overarm portion；Overarm portion includes multiple cantilever beams being arranged in order, and the first through hole is offered on the cantilever beam.Energy collecting device provided by the invention adds the effective length of piezoelectric vibrator, reduces the resonant frequency of piezoelectric vibrator, improve the efficiency of energy collecting device collecting energy by setting multiple cantilever beams and opening up through hole on a cantilever beam.
Description
Technical field
The present invention relates to the energy collecting device for low-power consumption product function, more particularly to energy collecting device.
Background technology
With the fast development of microelectronic manufacturing technology and radio sensing network, there are various new low-power consumption micros
Equipment.Traditional chemical cell has not been suitable for for miniaturized electronics due to volume is larger and service life is short
Energized with instrument.Energy collecting device is the device that the vibrational energy in surrounding environment is converted into electric energy, directly can be supplied for electrical equipment
Can or it be charged for energy storage device.It has the advantages that long working life, small volume.
At present, energy collecting device mainly has electromagnetic type, piezoelectric type and electrostatic by mode of operation classification, and wherein piezoelectric type should
With widest in area.The piezoelectric vibrator of traditional piezoelectric type energy collector is single cantilever beam structure, and it passes through in surrounding environment
Vibrational energy make cantilever beam occur resonance come collecting energy, can only frequency acquisition the close scope of cantilever beam resonant frequency environment
Vibrational energy.And the vibration frequency in surrounding environment is relatively low, cantilever beam resonant frequency is extremely difficult to, so energy acquisition efficiency is low,
It can not meet that miniaturized electronics and instrument use.
The content of the invention
Based on this, it is necessary to for conventional piezoelectric energy collecting device energy acquisition it is less efficient the problem of, there is provided Yi Zhongneng
Measure collector.
A kind of energy collecting device, including piezoelectric vibrator and pedestal, wherein,
Piezoelectric vibrator is comb teeth shape, including fixed part and overarm portion, fixed part one end are fixed on pedestal, the other end and outstanding
Beam portion is fixedly connected；
Overarm portion includes multiple cantilever beams being arranged in order, and the first through hole is offered on cantilever beam.
In a preferred embodiment, the second through hole is offered on fixed part, the first through hole and the second through hole connect
It is logical.
In one embodiment, the first through hole and the second through hole are bar hole.
Preferably, energy collecting device also includes mass, and mass is arranged on the one end of cantilever beam away from fixed part.
In one embodiment, the quantity of mass is 1；When cantilever beam quantity is odd number 2n+1, mass is set
(n+1)th one end of cantilever beam away from fixed part；When cantilever beam quantity is even number 2n, mass is arranged on n-th or n-th
The one end of+1 cantilever beam away from fixed part.
In one embodiment, the quantity of mass is more than or equal to 2；
When cantilever beam quantity is odd number 2n+1, one of mass is arranged on (n+1)th cantilever beam away from fixed part
One end, remaining mass arranges be arranged on (n+1)th adjacent cantilever beam in cantilever beam both sides away from fixed part one successively
End；
When cantilever beam quantity is even number 2n, two of which mass is separately positioned on n-th and (n+1)th cantilever beam is remote
From one end of fixed part, remaining mass arranges successively to be arranged on n-th and cantilever beam that (n+1)th cantilever beam both sides is adjacent
One end away from fixed part.
Preferably, energy collecting device also includes induction coil, and mass is magnet piece, and induction coil is arranged at mass
In induction region.
Preferably, induction coil is arranged on the surface of mass.
In one embodiment, fixed part and the material in overarm portion are piezoelectric bimorph, piezoelectric bimorph bag
Two piezoelectric layers and a basic unit are included, two piezoelectric layers are individually fixed in the upper and lower surface of basic unit, and basic unit is flexible PCB.
Preferably, the thickness of basic unit is less than or equal to 0.1mm.
The energy collecting device of the present invention is comb teeth shape structure, has multiple cantilever beams, all opens up and pass through on cantilever beam and fixed part
Perforation, the effective length of cantilever beam is added, reduce the resonant frequency of piezoelectric vibrator, piezoelectric vibrator is easier and ring around
Vibration source resonance in border, so as to improve energy acquisition efficiency.
Brief description of the drawings
Fig. 1 is the top view of the piezoelectric vibrator of the energy collecting device of one embodiment of the invention.
Fig. 2 is the top view of the piezoelectric vibrator of the energy collecting device of another embodiment of the present invention.
Fig. 3 is the profile for the cantilever beam for being provided with mass in Fig. 2 in energy collecting device.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
As shown in figure 1, the energy collecting device that one embodiment of the invention provides, including piezoelectric vibrator 1 and pedestal 2, wherein, pressure
Electric tachometer indicator 1 is comb teeth shape as shown in Figure 1, including fixed part 11 and overarm portion 12, and the one end of fixed part 11 is fixed another on the base 2
One end is fixedly connected with overarm portion 12, wherein, the mode being fixedly connected is diversified, for example, can be with integrated shaping, viscous
Patch fixation etc. is fixedly connected with mode；
Overarm portion 12 includes multiple cantilever beams 121 being arranged in order, and the first through hole 121a is offered on cantilever beam 121.
Specifically, being arranged in order for certain interval be present between referring to adjacent cantilever beam in the cantilever beam being arranged in order, it is adjacent outstanding
Arm beam can be parallel, can also have certain angle of inclination between each other.
Through hole is opened up on cantilever beam 121, the effective of piezoelectric vibrator is made in the case where not increasing piezoelectric vibrator area
Length increase, active width is narrower, reduces the resonant frequency of piezoelectric vibrator, make piezoelectric vibrator be easier with surrounding environment
Vibration source produces resonance, improves the energy acquisition efficiency of energy collecting device.
Further, the second through hole 111 is offered on fixed part 11.First through hole 121a and the second through hole 111
Connection.
Wherein, the first through hole 121a and the second through hole 111 can be the shapes such as bar hole, slotted hole.
The frequency of vibration source is probably and changed constantly in environment, and multiple vibration frequency peaks may be included in same environment
Value.Cantilever beam be provided with the through hole that connects on fixed part, the through hole on adjacent cantilever beam makes the portion between cantilever beam
Divide vacantly, the overall structure of piezoelectric vibrator can produce resonance along multiple directions, piezoelectric vibrator there are multiple resonant frequencies, different
Resonant frequency can be in matched environment different vibration frequencies, improve the energy acquisition efficiency of energy collecting device.
In certain embodiments, energy collecting device also includes mass 3, and mass 3 is arranged on cantilever beam away from fixed part
One end.
Mass is set on the one end of cantilever beam away from fixed part, cantilever beam can be made to be easier to vibrate, cantilever beam
Resonant frequency reduces.The resonance of piezoelectric vibrator is as caused by the cantilever beam above it, sets mass to reduce cantilever beam
Resonant frequency, the resonant frequency of piezoelectric vibrator also and then reduce so that the collecting efficiency of energy collecting device improves.
In certain embodiments, the quantity of mass 3 is 1, and when cantilever beam quantity is odd number 2n+1, mass is set
(n+1)th one end of cantilever beam away from fixed part；When cantilever beam quantity is even number 2n, mass is arranged on n-th or n-th
The one end of+1 cantilever beam away from fixed part.
For example, when cantilever beam quantity is 5, mass is arranged on the 3rd one end of cantilever beam away from fixed part.Cantilever beam number
Measure for 8 when, mass is arranged on the 4th or the 5th one end of cantilever beam away from fixed part.
In further embodiments, the quantity of mass 3 is more than or equal to 2；
When cantilever beam quantity is odd number 2n+1, one of mass is arranged on (n+1)th cantilever beam away from fixed part
One end, remaining mass arranges be arranged on (n+1)th adjacent cantilever beam in cantilever beam both sides away from fixed part one successively
End；
When cantilever beam quantity is even number 2n, two of which mass distribution is arranged on n-th and (n+1)th cantilever beam is remote
From one end of fixed part, remaining mass arranges successively to be arranged on n-th and cantilever beam that (n+1)th cantilever beam both sides is adjacent
One end away from fixed part.
In a specific embodiment, the quantity of cantilever beam is 6, and the quantity of mass is set respectively for 4,4 masses
Put on 4 therein of 6 cantilever beams.It is remote that two of which mass is separately positioned on the 3rd and the 4th, overarm portion cantilever beam
From one end of fixed part.Other two mass is respectively arranged at the 2nd and the 5th one end of cantilever beam away from fixed part.
In another specific embodiment, the quantity of cantilever beam is 7, and the quantity of mass is 3, one of mass
The 4th one end of cantilever beam away from fixed part is arranged on, other two mass is respectively arranged at two phases of the 4th cantilever beam
One end away from fixed part on adjacent cantilever beam.
Mass is preferentially arranged on most middle cantilever beam, be because when centre cantilever beam vibration when, being capable of band
Move its adjacent cantilever beam to vibrate, the electric energy of energization collector conversion.
For the electric energy of further energization collector conversion, setting mass 3 is magnet piece, in the electricity of mass 3
Induction coil 4, when being provided with the cantilever beam vibration of mass, induction coil are set in magnetic induction region because electromagnetic induction produces
Raw electric energy, the electric energy of energization collector conversion.
Further, as shown in figure 3, induction coil 4 is arranged on the surface of mass 3.When being provided with the outstanding of mass
During arm beam vibration, electric energy caused by the induction coil internal cause electromagnetic induction of surface is more.And electric energy is produced in induction coil
Afterwards, interaction force is produced between induction coil and mass.Above-mentioned active force can increase the cantilever beam for being provided with mass
Oscillation Amplitude in resonance, and when the frequency in ambient vibration source deviates from resonant frequency, slow down and be provided with mass
The reduction speed of cantilever beam Oscillation Amplitude, while adjacent cantilever beam vibration is driven, make the working band of energy collecting device wider, energy
Measure the more efficient of collector collecting energy.
In certain embodiments, fixed part 11 and the material in overarm portion 12 are piezoelectric bimorph 5, piezoelectric ceramics twin crystal
Piece 5 includes two piezoelectric layers 51 and a basic unit 52, and two piezoelectric layers are fixed on the upper and lower surface of basic unit, and fixed form can be
Stickup, integrated molding etc..Basic unit 52 is flexible PCB.
Flexible PCB be using polyimides or polyester film as a kind of circuit board made of base material, its pliability is good,
Thickness can flexibly be accomplished very thin.
Optionally, the piezoelectric of piezoelectric layer 51 is piezoelectric ceramics.
In some embodiments of the invention, the thickness of basic unit's flexible PCB is less than or equal to 0.1mm.Therefore using flexible
The piezoelectric vibrator that circuit board does base material possesses lower resonant frequency, and this makes energy collecting device be easier to collect ring around
It is less than 50Hz vibrational energy in border, energy acquisition is more efficient.
In a specific embodiment, as shown in Fig. 2 energy collecting device includes piezoelectric vibrator 1 and pedestal 2, piezoelectric vibrator 1
It is sheet comb teeth shape, piezoelectric vibrator 1 includes fixed part 11 and overarm portion 12, and overarm portion 12 includes six cantilever beams being arranged in order
121, adjacent cantilever beam 121 is parallel to each other.Fixed part 11 and the integrated molding of overarm portion 12, material is all that thickness is 0.45mm
Piezoelectric bimorph 5.
The a width of 30mm*3mm of length of fixed part 11, a long side end are fixed on pedestal 2, another long side end connection overarm
Six cantilever beams 121 in portion 12.3rd and the 4th one end of cantilever beam away from fixed part in six cantilever beams in overarm portion 12
On be provided with magnet mass 3, mass 3 is arranged above induction coil 4.The cantilever for being not provided with mass of both sides four
The a width of 30mm*3.5mm of length of beam, a width of 37mm*4.5mm of length of cantilever of middle two settings mass, the size of mass
For 4.5mm*4.5mm*4.5mm.
Offering the first through hole 121a on cantilever beam 121, the first through hole is the bar hole that width is 0.5mm, first
The long side direction of through hole is consistent with cantilever beam stretching direction.Both sides four are not provided with opened up on the cantilever beam of mass
Pass through aperture length is 29.5mm, and first opened up on the cantilever beam of middle two settings mass is through hole length
31.5mm。
The second through hole 111 is offered on fixed part 11, the second through hole is the bar hole that width is 0.5mm, and second passes through
The long side direction of perforation is vertical with cantilever beam stretching direction, length 27mm.First through hole 121a and the second through hole 111 connect
It is logical.
The piezoelectric bimorph 5 used in the present embodiment is made up of two piezoelectric layers 51 and a basic unit 52, two pressures
Electric layer is respectively adhered on basic unit's upper and lower surface, and the piezoelectric of piezoelectric layer is the piezoelectric ceramics PZT-5A that thickness is 0.2mm, basic unit
Material be thickness be 0.05mm flexible PCB.
Energy collecting device provided by the invention, by setting the cantilever beam of multiple connections, and on cantilever beam and fixed part
The mode of through hole is set, the effective length of piezoelectric vibrator is added on the basis of volume is not increased, reduces piezoelectric vibrator
Resonant frequency.Because multiple cantilever beams connect one, resonance can be produced along multiple directions, piezoelectric vibrator there are multiple resonance
Frequency.By setting mass and coil on a cantilever beam, piezoelectric bimorph material of the basic unit for flexible PCB is used,
The resonant frequency of piezoelectric vibrator is reduce further, the working band of piezoelectric vibrator has been widened, has added caused by electromagnetic induction
Electric energy, the energy acquisition efficiency of energy collecting device is set to have arrived effective raising, the electricity of collection is more.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of energy collecting device, including piezoelectric vibrator and pedestal, it is characterised in that：
The piezoelectric vibrator is comb teeth shape, including fixed part and overarm portion, described fixed part one end are fixed on pedestal, the other end
It is fixedly connected with overarm portion；
The overarm portion includes multiple cantilever beams being arranged in order, and the first through hole is offered on the cantilever beam.
2. energy collecting device according to claim 1, it is characterised in that the second through hole is offered on the fixed part,
First through hole connects with the second through hole.
3. energy collecting device according to claim 2, it is characterised in that first through hole and the second through hole are bar
Shape hole.
4. energy collecting device according to claim 1, it is characterised in that be also arranged on including mass, the mass
The one end of the cantilever beam away from fixed part.
5. energy collecting device according to claim 4, it is characterised in that the quantity of the mass is 1；
When cantilever beam quantity is odd number 2n+1, the mass is arranged on (n+1)th one end of cantilever beam away from fixed part；
When cantilever beam quantity is even number 2n, the mass be arranged on n-th or (n+1)th cantilever beam away from fixed part one
End.
6. energy collecting device according to claim 4, it is characterised in that the quantity of the mass is more than or equal to 2；
When cantilever beam quantity is odd number 2n+1, one of them described mass is arranged on (n+1)th cantilever beam away from fixed part
One end, remaining described mass arranges successively is arranged on the adjacent cantilever beam in (n+1)th cantilever beam both sides away from solid
Determine the one end in portion；
When cantilever beam quantity is even number 2n, mass described in two of which is separately positioned on n-th and (n+1)th cantilever beam is remote
From one end of fixed part, remaining described mass arranges successively to be arranged on n-th and that (n+1)th cantilever beam both sides is adjacent is outstanding
The one end of arm beam away from fixed part.
7. energy collecting device according to claim 4, it is characterised in that also including induction coil, the mass is magnetic
Iron block, the induction coil are arranged in the induction region of the mass.
8. energy collecting device according to claim 7, it is characterised in that the induction coil is arranged on the mass
Surface.
9. energy collecting device according to claim 1, it is characterised in that the fixed part and the material in overarm portion are piezoelectricity
Ceramic twin lamella, the piezoelectric bimorph include two piezoelectric layers and a basic unit, and two piezoelectric layers are fixed respectively
In the upper and lower surface of the basic unit, the basic unit is flexible PCB.
10. energy collecting device according to claim 9, it is characterised in that the thickness of the basic unit is less than or equal to 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823070.0A CN107395063A (en) | 2017-09-13 | 2017-09-13 | Energy collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823070.0A CN107395063A (en) | 2017-09-13 | 2017-09-13 | Energy collecting device |
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| Publication Number | Publication Date |
|---|---|
| CN107395063A true CN107395063A (en) | 2017-11-24 |
Family
ID=60349641
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|---|---|---|---|
| CN201710823070.0A Pending CN107395063A (en) | 2017-09-13 | 2017-09-13 | Energy collecting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418470A (en) * | 2018-03-14 | 2018-08-17 | 佛山市顺德区中山大学研究院 | Piezoelectric energy collector |
| CN108566118A (en) * | 2018-03-15 | 2018-09-21 | 佛山市顺德区中山大学研究院 | One kind being based on spiral helicine energy collecting device |
| CN108957031A (en) * | 2018-08-07 | 2018-12-07 | 东南大学 | Wide range high sensitivity vibration of optical sensor based on vibration coupling |
| CN110086376A (en) * | 2019-05-07 | 2019-08-02 | 湖南工程学院 | Small-sized wind energy collector with frequency and displacement equations effect |
| CN111412237A (en) * | 2019-01-04 | 2020-07-14 | 斯凯孚公司 | Suspension spring |
| CN113067500A (en) * | 2021-04-01 | 2021-07-02 | 巢湖学院 | Piezoelectric ceramic energy collector |
| US11736041B2 (en) | 2019-01-04 | 2023-08-22 | Aktiebolaget Skf | Suspension assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106899233A (en) * | 2017-04-14 | 2017-06-27 | 合肥工业大学 | A kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device |
-
2017
- 2017-09-13 CN CN201710823070.0A patent/CN107395063A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106899233A (en) * | 2017-04-14 | 2017-06-27 | 合肥工业大学 | A kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418470A (en) * | 2018-03-14 | 2018-08-17 | 佛山市顺德区中山大学研究院 | Piezoelectric energy collector |
| CN108566118A (en) * | 2018-03-15 | 2018-09-21 | 佛山市顺德区中山大学研究院 | One kind being based on spiral helicine energy collecting device |
| CN108957031A (en) * | 2018-08-07 | 2018-12-07 | 东南大学 | Wide range high sensitivity vibration of optical sensor based on vibration coupling |
| CN111412237A (en) * | 2019-01-04 | 2020-07-14 | 斯凯孚公司 | Suspension spring |
| US11736041B2 (en) | 2019-01-04 | 2023-08-22 | Aktiebolaget Skf | Suspension assembly |
| US11764607B2 (en) | 2019-01-04 | 2023-09-19 | Aktiebolaget Skf | Suspension spring |
| CN111412237B (en) * | 2019-01-04 | 2024-04-05 | 斯凯孚公司 | Suspension spring |
| CN110086376A (en) * | 2019-05-07 | 2019-08-02 | 湖南工程学院 | Small-sized wind energy collector with frequency and displacement equations effect |
| CN110086376B (en) * | 2019-05-07 | 2020-03-17 | 湖南工程学院 | Small wind energy collector with frequency and displacement amplification function |
| CN113067500A (en) * | 2021-04-01 | 2021-07-02 | 巢湖学院 | Piezoelectric ceramic energy collector |
| CN113067500B (en) * | 2021-04-01 | 2021-10-26 | 巢湖学院 | Piezoelectric ceramic energy collector |
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