CN108448937B - Double-track arc piezoelectric energy collector - Google Patents
Double-track arc piezoelectric energy collector Download PDFInfo
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- CN108448937B CN108448937B CN201810409062.6A CN201810409062A CN108448937B CN 108448937 B CN108448937 B CN 108448937B CN 201810409062 A CN201810409062 A CN 201810409062A CN 108448937 B CN108448937 B CN 108448937B
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- arc
- circular arc
- piezoelectric
- piezoelectric energy
- sheet
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- 230000009977 dual effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 7
- 230000005284 excitation Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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 double-track arc piezoelectric energy collector, which comprises a cantilever beam pair, wherein the cantilever beam pair is formed by connecting two mutually symmetrical cantilever beams, each cantilever beam is formed by connecting an arc-shaped sheet and a square sheet, a piezoelectric layer is attached to the arc-shaped sheet, and a mass block is attached to the square sheet; the cantilever beam pairs are symmetrically distributed by taking the diagonal line of the square sheet as a central symmetry axis; the left end of the arc-shaped sheet is connected with a square sheet, and the right end of the arc-shaped sheet is a fixed end. The double-track circular arc type piezoelectric energy collector of the technical scheme not only can absorb vibration energy in the directions of the top surface and the side surface, but also has the advantages of high output voltage, high space utilization rate and good stability, and has the characteristics of easy integration and micromation.
Description
Technical Field
The invention relates to a double-track arc piezoelectric energy collector, and belongs to the technical field of energy collection.
Background
The piezoelectric energy collector converts mechanical energy which cannot be directly utilized in the surrounding environment into electric energy which can be directly utilized by utilizing a piezoelectric effect mode. The piezoelectric energy collector commonly used at present is usually in a straight structure, and the piezoelectric energy collector can play a role in energy collection under the structure, but experiments show that the frequency range of the collectable energy is smaller, and the output potential is lower. In addition, the piezoelectric energy collector with the straight structure has a series of defects of low stability, low space utilization and the like. The traditional single-arc piezoelectric energy collector is applied to the top surface or the side surface of the mass block through external vibration, the cantilever beam is deformed in a vibrating way, and the piezoelectric layer generates electric potential.
Although the traditional high-performance arc piezoelectric energy collector can convert load into electric energy for output under a certain radian, the output potential of the traditional high-performance arc piezoelectric energy collector is obviously smaller under a certain additional load, the energy and space utilization rate is lower, and the stability problem is easily caused by the asymmetric structure.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a double-track arc piezoelectric energy collector.
The aim of the invention is achieved by the following technical scheme: the utility model provides a double track circular arc type piezoelectric type energy collector, includes a cantilever beam pair, the cantilever beam is formed by two mutual symmetrical cantilever beams connection, every the cantilever beam is formed by a circular arc type thin slice and a square thin slice connection, be attached with the piezoelectricity layer on the circular arc type thin slice, be attached with the quality piece on the square thin slice.
Preferably, the cantilever beam pairs are symmetrically distributed with the diagonal of the square sheet as the center symmetry axis.
Preferably, the left end of the circular arc-shaped sheet is connected with a square sheet, and the right end of the circular arc-shaped sheet is a fixed end.
Preferably, the square sheet is a circular arc type material layer.
Preferably, the cantilever beam is made of phosphor bronze material.
Preferably, the inner diameter of the circular arc-shaped sheet is 20mm, the outer diameter is 30mm, the width is 10mm, and the radian is 90 degrees.
Preferably, the piezoelectric layer is PZT-5H.
Preferably, the inner diameter of the piezoelectric layer is 20mm, the outer diameter is 30mm, the thickness is 0.3mm, and the radian is 90 degrees.
Preferably, the mass is made of nickel material.
Preferably, the length, width and height of the mass block are respectively 10mm, 10mm and 10mm.
The technical scheme of the invention has the advantages that:
the piezoelectric layer area of the double-track circular arc piezoelectric energy collector is twice that of the circular arc piezoelectric energy collector under the condition that the external excitation load is unchanged, which means that the double-track piezoelectric energy collector can output more power energy and has higher potential.
For the mass block with the same size, the double-track circular arc piezoelectric energy collector is correspondingly provided with two piezoelectric layers, and the circular arc piezoelectric energy collector is of a single-rail structure, and only one piezoelectric layer corresponds to the mass block.
The double-track circular arc piezoelectric energy collector consists of two completely symmetrical cantilever beams and a piezoelectric layer attached to the cantilever beams, so that the double-track circular arc piezoelectric energy collector has symmetry, and the double-track circular arc piezoelectric energy collector has better symmetry and applicability. Compared with a single-track arc-shaped piezoelectric energy collector, the double-track arc-shaped piezoelectric energy collector of the technical scheme not only can absorb vibration energy in the directions of the top surface and the side surface, but also has the advantages of high output voltage, high space utilization rate and good stability, and has the characteristics of easy integration and micromation.
Drawings
Fig. 1 is a schematic structural view of a double track circular arc type piezoelectric energy collector according to the present invention.
FIG. 2 is a graph of output voltage versus frequency for a circular arc piezoelectric energy harvester and a dual rail circular arc piezoelectric energy harvester according to the present invention.
Detailed Description
The objects, advantages and features of the present invention are illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of the technical scheme of the invention, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the scope of the invention.
The invention discloses a double-track arc piezoelectric energy collector, which is shown in fig. 1 and comprises a cantilever beam pair 1, wherein the cantilever beam pair is formed by symmetrically connecting two mutually symmetrical cantilever beams, each cantilever beam is formed by symmetrically connecting an arc-shaped sheet 2 and a square sheet 3, and in particular, each cantilever beam is formed by connecting two identical arc-shaped sheets with a certain radian with the square sheet. The cantilever beam is made of phosphor bronze materials with wide sources, good ductility and easy deformation.
The piezoelectric layer 4 is attached to the circular arc-shaped sheet, and the mass 5 is attached to the square sheet. The piezoelectric layer is PZT-5H. The inner diameter of the piezoelectric layer is 20mm, the outer diameter of the piezoelectric layer is 30mm, the thickness of the piezoelectric layer is 0.3mm, the radian of the piezoelectric layer is 90 degrees, and the arc-shaped piezoelectric layer with the radian of 90 degrees is attached to the arc-shaped sheet with the radian of 90 degrees. The mass block is made of nickel materials with higher density, and is attached to the square sheet, and the length, width and height of the mass block are respectively 10mm, 10mm and 10mm. The corresponding cantilever Liang Yuanhu type thin sheet and the attached piezoelectric layer of the double-track arc-shaped piezoelectric energy collector with different radians are different.
The left end of the circular arc-shaped sheet is connected with a square sheet, the length and the width of the square sheet are lm=10 mm and wm=10 mm respectively, the width w=10 mm and the thickness hs=0.5 mm of the base layer, and the right end of the circular arc-shaped sheet is a fixed end 6. The inner diameter Ra of the arc-shaped sheet is 20mm, the outer diameter Rb is 30mm, the width is 10mm, and the radian is 90 degrees.
The two identical cantilever beam pairs are symmetrically distributed by taking the diagonal line of the square sheet as a central symmetry axis, so that the double-rail piezoelectric energy collector has better stability. The two piezoelectric layers are connected with the same mass block, so that the double-track circular arc piezoelectric energy collector can output energy with higher power under the condition that the applied excitation load is unchanged. In addition, the double-rail structure effectively improves the space utilization rate of the piezoelectric energy collector, and further improves the integration level of the integrated unit small module serving as the piezoelectric integrated chip.
In order to better embody the advantages of the structure compared with the circular arc type piezoelectric energy collector, a 10pa boundary load with the vertical downward direction is applied to the top end of the mass block, a relation diagram between the output voltage and the energy frequency of the circular arc type and double-track circular arc type piezoelectric energy collector is made, as shown in fig. 2, the abscissa of fig. 2 represents the power, and the ordinate represents the voltage. It can be seen from the figure that for a circular arc piezoelectric energy collector, the first order resonant frequency is 85Hz, and the output voltage is 0.69V. For the graph of voltage versus frequency for a dual rail circular arc piezoelectric energy harvester, the energy harvester has a maximum output voltage of 0.94V at a first order frequency of 90 Hz. It can be seen that the double track circular arc energy collector has a better output high potential advantage than the circular arc piezoelectric energy collector.
It can be found in conjunction with fig. 1 that, for masses of the same size, the dual-rail circular arc piezoelectric energy collector of the present solution corresponds to two piezoelectric layers, whereas the circular arc piezoelectric energy collector is of a monorail structure, and only one piezoelectric layer corresponds to a mass. The structure effectively improves the space utilization rate, and further improves the integration level of the integrated unit small module serving as the piezoelectric integrated chip.
The double-track arc piezoelectric energy collector of the technical scheme consists of two completely symmetrical cantilever beams and a piezoelectric layer attached to the cantilever beams, so that the double-track arc piezoelectric energy collector has symmetry. This allows for a double rail piezoelectric energy harvester with better symmetry. Compared with a single-track arc-shaped piezoelectric energy collector, the double-track arc-shaped piezoelectric energy collector of the technical scheme not only can absorb vibration energy in the directions of the top surface and the side surface, but also has the advantages of high output voltage, high space utilization rate and good stability, and has the characteristics of easy integration and micromation.
Compared with the traditional circular arc piezoelectric energy collector, the energy collector adopts a double-track circular arc symmetrical structural design with a certain radian. When excitation is applied to the mass, a circular arc piezoelectric energy collector of a particular arc may produce a higher potential. Meanwhile, the double-track arc-shaped energy collector can improve the space utilization rate of devices, improve the integration level, enhance the stability and have higher research value.
The energy collector of the invention adopts a double-track arc structural design with symmetrical structure. When excitation is applied to the mass, the circular arc piezoelectric energy collector of a particular arc produces a higher potential. The double-track arc-shaped energy collector not only can output ultrahigh potential, but also can improve the space utilization rate and the integration level of devices, and brings better stability.
The invention has various embodiments, and all technical schemes formed by equivalent transformation or equivalent transformation fall within the protection scope of the invention.
Claims (8)
1. A double track circular arc piezoelectric energy collector, characterized in that: the cantilever beam pair is formed by symmetrically connecting two mutually symmetrical cantilever beams, each cantilever beam is formed by connecting an arc-shaped sheet and a square sheet, and the cantilever beam pair is symmetrically distributed by taking the diagonal of the square sheet as a central symmetry axis; the left end of the circular arc-shaped sheet is connected with a square sheet, and the right end of the circular arc-shaped sheet is a fixed end; the piezoelectric layer is attached to the circular arc-shaped sheet, the mass block is attached to the square sheet, and the two piezoelectric layers are connected with the same mass block.
2. The dual track circular arc piezoelectric energy harvester of claim 1 wherein: the square sheet is an arc-shaped material layer.
3. The dual track circular arc piezoelectric energy harvester of claim 1 wherein: the cantilever beam is made of phosphor bronze material.
4. The dual track circular arc piezoelectric energy harvester of claim 1 wherein: the inner diameter of the arc-shaped sheet is 20mm, the outer diameter of the arc-shaped sheet is 30mm, the width of the arc-shaped sheet is 10mm, and the radian of the arc-shaped sheet is 90 degrees.
5. The dual track circular arc piezoelectric energy harvester of claim 1 wherein: the piezoelectric layer is PZT-5H.
6. The dual track circular arc piezoelectric energy harvester of claim 1 wherein: the inner diameter of the piezoelectric layer is 20mm, the outer diameter of the piezoelectric layer is 30mm, the thickness of the piezoelectric layer is 0.3mm, and the radian of the piezoelectric layer is 90 degrees.
7. The dual track circular arc piezoelectric energy harvester of claim 1 wherein: the mass block is made of nickel material.
8. The dual track circular arc piezoelectric energy harvester of claim 1 wherein: the length, width and height of the mass block are respectively 10mm, 10mm and 10mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810409062.6A CN108448937B (en) | 2018-05-02 | 2018-05-02 | Double-track arc piezoelectric energy collector |
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| CN201810409062.6A CN108448937B (en) | 2018-05-02 | 2018-05-02 | Double-track arc piezoelectric energy collector |
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| CN108448937B true CN108448937B (en) | 2024-03-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931340A (en) * | 2012-11-15 | 2013-02-13 | 重庆大学 | Wideband micro piezoelectric vibration energy collector and manufacturing method thereof |
| CN107919816A (en) * | 2017-12-18 | 2018-04-17 | 南京邮电大学 | Double freedom circular arc type piezoelectric energy collector |
| CN107947635A (en) * | 2017-12-18 | 2018-04-20 | 南京邮电大学 | High-performance circular arc type piezoelectric type energy collector |
| CN208174575U (en) * | 2018-05-02 | 2018-11-30 | 南京邮电大学 | A kind of double track circular arc type piezoelectric type energy collector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015503218A (en) * | 2011-11-04 | 2015-01-29 | アルトエナジス ピーエルシー | Piezoelectric energy recovery device or actuator |
| JP2016511628A (en) * | 2013-03-13 | 2016-04-14 | マイクロジェン システムズ インコーポレイテッド | Symmetric double piezoelectric stack microelectromechanical piezoelectric cantilever energy recovery device |
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- 2018-05-02 CN CN201810409062.6A patent/CN108448937B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931340A (en) * | 2012-11-15 | 2013-02-13 | 重庆大学 | Wideband micro piezoelectric vibration energy collector and manufacturing method thereof |
| CN107919816A (en) * | 2017-12-18 | 2018-04-17 | 南京邮电大学 | Double freedom circular arc type piezoelectric energy collector |
| CN107947635A (en) * | 2017-12-18 | 2018-04-20 | 南京邮电大学 | High-performance circular arc type piezoelectric type energy collector |
| CN208174575U (en) * | 2018-05-02 | 2018-11-30 | 南京邮电大学 | A kind of double track circular arc type piezoelectric type energy collector |
Non-Patent Citations (3)
| Title |
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| 压电振动能量收集装置研究现状及发展趋势;刘祥建等;《振动与冲击》;全文 * |
| 应用于能量收集中的接口电路的设计;邝小飞;刘亚茹;刘梨;;电子科技(第01期);全文 * |
| 悬臂梁式压电能量收集器的建模与分析;陈定方;沈威;明廷鑫;黄志威;;南昌工程学院学报(第04期);全文 * |
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