CN108390590A - A kind of multiple degrees of freedom circular arc type piezoelectric energy collector - Google Patents
A kind of multiple degrees of freedom circular arc type piezoelectric energy collector Download PDFInfo
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- CN108390590A CN108390590A CN201810408685.1A CN201810408685A CN108390590A CN 108390590 A CN108390590 A CN 108390590A CN 201810408685 A CN201810408685 A CN 201810408685A CN 108390590 A CN108390590 A CN 108390590A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 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
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- 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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Abstract
The present invention discloses a kind of multiple degrees of freedom circular arc type piezoelectric energy collector, which includes first layer cantilever beam, second layer cantilever beam and third layer cantilever beam, and first layer cantilever beam is centrosymmetric with second layer cantilever beam；Second layer cantilever beam is centrosymmetric with third layer cantilever beam and constitutes spring-like.First layer cantilever beam includes the first circular arc type thin slice and the second circular arc type thin slice, one end of first circular arc type thin slice is connected with the first square sheets, the other end of first square sheets connects the second circular arc type thin slice, the other end of second circular arc type thin slice connects the second square sheets, and the first piezoelectric layer and the second piezoelectric layer are attached with respectively on the first circular arc type thin slice and the second circular arc type thin slice.The multiple degrees of freedom circular arc type piezoelectric energy collector one class resonant frequency is relatively low, and frequency spacing is shorter, can absorb energy on three-dimensional, and has many advantages, such as being easily integrated, micromation.
Description
Technical field
The present invention relates to a kind of multiple degrees of freedom circular arc type piezoelectric energy collectors, belong to energy collection technology field.
Background technology
Piezoelectric effect of the piezoelectric energy collector based on piezoelectric material, under the excitation of ambient vibration, the piezoelectricity in device
Layer generates strain, polarization charge is generated on surface, to which the mechanical energy of ambient vibration is converted into required electric energy.Often at present
Piezoelectric type energy collector is usually straight type structure, although collection of energy can be played the role of under this structure,
Experiment shows that collectable energy frequency range is smaller, and output potential is relatively low.In addition to this, the piezoelectric energy of straight type structure is collected
Device also has a series of defects such as stability is low, space availability ratio is few.
Traditional single circular arc piezoelectric type energy collector is by being certain arc by Design of Cantilever Beam, under specific radian
High potential is exported, the vibrational energy of top surface can be not only absorbed, the vibrational energy of side surface direction can also be absorbed.Traditional high property
Although energy circular arc type piezoelectric energy collector can convert load under certain radian electric energy output, outside certain
It loads under lotus, its output potential is significantly smaller, and energy and space availability ratio are relatively low, and structure asymmetry easily causes stability
Problem.
Invention content
The purpose of the present invention is exactly to propose a kind of multiple degrees of freedom circular arc to solve the above-mentioned problems in the prior art
Type piezoelectric energy collector, the structure have many advantages, such as that resonant frequency is low, and multistage bandwidth is short, and energy can be absorbed on three-dimensional
Amount.
The purpose of the present invention will be achieved by the following technical programs：A kind of multiple degrees of freedom circular arc type piezoelectric energy collection
Device, including first layer cantilever beam, second layer cantilever beam and third layer cantilever beam, during first layer cantilever beam is in second layer cantilever beam
The heart is symmetrical；Second layer cantilever beam is centrosymmetric with third layer cantilever beam and constitutes spring-like.
Preferably, the first layer cantilever beam includes the first circular arc type thin slice and the second circular arc type thin slice, first circle
One end of camber thin slice is connected with the first square sheets, and the other end the second circular arc type of connection of first square sheets is thin
The other end of piece, the second circular arc type thin slice connects the second square sheets, and the first circular arc type thin slice and the second circular arc type are thin
On piece is attached with the first piezoelectric layer and the second piezoelectric layer respectively.
Preferably, it is provided with the first mass block in first square sheets, is arranged in second square sheets
There is the second mass block.
Preferably, the second layer cantilever beam includes third circular arc type thin slice and the 4th circular arc type thin slice, the third circle
One end of camber thin slice is connected with third square sheets, and the other end of the third circular arc type thin slice is connected with the 4th square
The other end of thin slice, the 4th square sheets connects the 4th circular arc type thin slice, the third circular arc type thin slice and the 4th circle
Third piezoelectric layer and the 4th piezoelectric layer are attached on camber thin slice respectively, adheres to above second mass block and is being provided with the 5th just
Square sheet, the 5th square sheets are provided with for connecting second layer cantilever beam in the third square sheets
Three mass blocks are provided with the 4th mass block in the 4th square sheets.
Preferably, attachment is provided with the 6th square sheets on the third mass block, and the 6th square sheets are used
In connection third layer cantilever beam, the third layer cantilever beam includes the 6th circular arc type thin slice and the 7th circular arc type thin slice, and described the
One end of six circular arc type thin slices is connected with the 6th square sheets, and the other end of the 6th square sheets connects the 7th circular arc
The other end of type thin slice, the 7th circular arc type thin slice connects the 7th square sheets, the 6th circular arc type thin slice and the 7th circular arc
The 6th piezoelectric layer and the 7th piezoelectric layer are attached on type thin slice respectively.
Preferably, the cantilever beam is made of phosphor bronze material.
Preferably, the internal diameter of the arc-shaped thin slice be 20mm, outer diameter 30mm, thickness 0.5mm, circular arc degree 90
Degree.
Preferably, the piezoelectric layer is PZT-5H.
Preferably, the internal-and external diameter of the piezoelectric layer is respectively 20mm, 30mm, and thickness 0.3mm, circular arc degree is 90 degree.
Preferably, the mass block is made of nickel material, the length of the mass block be respectively 10mm, 10mm,
10mm。
The advantages of technical solution of the present invention, is mainly reflected in：
The multiple degrees of freedom circular arc type piezoelectric energy collector one class resonant frequency is relatively low, and frequency spacing is shorter, being capable of three-dimensional
Upper absorption energy, and have many advantages, such as being easily integrated, micromation.
The multiple degrees of freedom circular arc piezoelectric energy collector swashs compared with mono-/bis-degree of freedom circular arc type piezoelectric energy collector
The front, side and top surface for acting on mass block are encouraged, energy is collected on three-dimensional to realize, is effectively improved space profit
With rate, and then integrated level of the technical program as the integrated unit little module of piezoelectricity integrated chip is improved, and output voltage
It is higher.
The multiple degrees of freedom circular arc piezoelectric energy collector is compared with mono-/bis-degree of freedom circular arc type piezoelectric energy collector, and one
Rank resonant frequency is lower, and effective working band bandwidth increases substantially, and multistage bandwidth is shorter, therefore, it is possible to well with low frequency
The vibration environment of multi-source matches, and wideband effect is better achieved.
The multiple degrees of freedom circular arc piezoelectric energy collector compared with mono-/bis-degree of freedom circular arc type piezoelectric energy collector, by
Multiple 90 ° of circular arc type cantilever beams composition " spring " types, structure novel, sensitivity are higher.
Description of the drawings
Fig. 1 is a kind of side view of multiple degrees of freedom circular arc piezoelectric energy collector of the present invention.
Fig. 2 is the structural schematic diagram of the multiple degrees of freedom circular arc piezoelectric energy collector of the present invention.
Fig. 3 is the vertical view of the multiple degrees of freedom circular arc piezoelectric energy collector of the present invention.
Fig. 4 is the geometry schematic diagram of double freedom circular arc piezoelectric energy collector.
Fig. 5 is the potential and frequency relation figure of double freedom circular arc piezoelectric energy collector.
Fig. 6 is the directions the x potential and frequency relation figure of the multiple degrees of freedom circular arc piezoelectric energy collector of the present invention.
Fig. 7 is the directions the y potential and frequency relation figure of the multiple degrees of freedom circular arc piezoelectric energy collector of the present invention.
Fig. 8 is the directions the z potential and frequency relation figure of the multiple degrees of freedom circular arc piezoelectric energy collector of the present invention.
Specific implementation mode
The purpose of the present invention, advantage and feature, by by the non-limitative illustration of preferred embodiment below carry out diagram and
It explains.These embodiments are only the prominent examples using technical solution of the present invention, it is all take equivalent replacement or equivalent transformation and
The technical solution of formation, all falls within the scope of protection of present invention.
Present invention is disclosed a kind of multiple degrees of freedom circular arc type piezoelectric energy collectors, as shown in Figure 1 and Figure 2 and Figure 3, the pressure
Electric flux collector includes first layer cantilever beam 1, second layer cantilever beam 2 and third layer cantilever beam 3, first layer cantilever beam and second
Layer cantilever beam is centrosymmetric；Second layer cantilever beam is centrosymmetric with third layer cantilever beam and constitutes spring-like.Every layer of cantilever beam
Layer is made of two duplicate 90 ° of circular arc type thin slices, and piezoelectric layer is attached on circular arc type thin slice, and mass block is attached to just
On square sheet.First layer cantilever beam 1, second layer cantilever beam 2 and third layer cantilever beam 3 are all made of phosphor bronze material and are made.
Specifically, as shown in Fig. 2, the first layer cantilever beam 1 includes that the first circular arc type thin slice 11 and the second circular arc type are thin
Piece 12, one end of the first circular arc type thin slice are connected with the first square sheets 13, first square sheets it is another
The other end of the second circular arc type thin slice 12 of end connection, the second circular arc type thin slice connects the second square sheets 14, first circle
The first piezoelectric layer 111 and the second piezoelectric layer 121, first piezoelectricity are attached on camber thin slice and the second circular arc type thin slice respectively
Layer 111 and the second piezoelectric layer 121 are PZT-5H, and the internal-and external diameter of first piezoelectric layer, 111 and second piezoelectric layer 121 is respectively
20mm, 30mm, thickness 0.3mm, circular arc degree are 90 degree.
It is provided with the first mass block 131 in first square sheets, is provided in second square sheets
Two mass blocks 141, first mass block and the second mass block are made of nickel material, the 6th mass block and the 7th mass
The length of block is respectively 10mm, 10mm, 10mm.In the technical scheme, the first circular arc type thin slice and the second circular arc
The internal diameter Ra of type thin slice is 20mm, outer diameter Rb is 30mm, and thickness Hp is 0.5mm, and circular arc degree is 90 degree.
The second layer cantilever beam 2 includes third circular arc type thin slice 20 and the 4th circular arc type thin slice 21, the third circular arc
One end of type thin slice is connected with third square sheets 100, and the other end of the third circular arc type thin slice is connected with the 4th pros
The other end of shape thin slice 200, the 4th square sheets connects the 4th circular arc type thin slice, 20 He of third circular arc type thin slice
Third piezoelectric layer and the 4th piezoelectric layer, the third piezoelectric layer and the 4th piezoelectric layer are attached on 4th circular arc type thin slice 21 respectively
Internal-and external diameter be respectively 20mm, 30mm, thickness 0.3mm, circular arc degree is 90 degree.
Second mass block, 141 top attachment is provided with the 5th square sheets 300, and the 5th square sheets are used
In being provided with third mass block 101 on connection second layer cantilever beam 2, the third square sheets 100, the described 4th is square
The 4th mass block is provided on thin slice, in the technical scheme, the third circular arc type thin slice and the 4th circular arc type thin slice it is interior
Diameter Ra is 20mm, outer diameter Rb is 30mm, and thickness Hp is 0.5mm, and circular arc degree is 90 degree.The third mass block and the 4th mass block
It is made of nickel material, the length of the 6th mass block and the 7th mass block is respectively 10mm, 10mm, 10mm.
Attachment is provided with the 6th square sheets 400 on the third mass block, and the 6th square sheets 400 are used for
Third layer cantilever beam 3 is connected, the third layer cantilever beam 3 includes the 6th circular arc type thin slice 31 and the 7th circular arc type thin slice, at this
In technical solution, the 6th circular arc type thin slice and internal diameter Ra of the 7th circular arc type thin slice is 20mm, outer diameter Rb is 30mm, thickness
Hp is 0.5mm, and circular arc degree is 90 degree.
One end of the 6th circular arc type thin slice 31 is connected with the 6th square sheets, the 6th square sheets it is another
One end connects the 7th circular arc type thin slice, and the other end of the 7th circular arc type thin slice connects the 7th square sheets, the 6th circular arc
The 6th piezoelectric layer and the 7th piezoelectric layer, the 6th piezoelectric layer and the 7th are attached on type thin slice and the 7th circular arc type thin slice respectively
The internal-and external diameter of piezoelectric layer is respectively 20mm, 30mm, and thickness 0.3mm, circular arc degree is 90 degree.The 6th circular arc type thin slice and
The 6th mass block and the 7th mass block are respectively arranged on seven circular arc type thin slices, the 6th mass block and the 7th mass block use
Nickel material is made, and the length of the 6th mass block and the 7th mass block is respectively 10mm, 10mm, 10mm.
When incentive action is in mass block so that arc-shaped piezoelectric layer generates deformation, and then generates potential.Using circular arc type
Structure can not only receive the vibrational energy of top surface, can also receive the vibrational energy of side.And it is outstanding using multiple 90 ° of circular arc types
Arm beam constitutes spring-like, can absorb the energy on three-dimensional, improve the voltage of output, and expand bandwidth of operation.
The structural schematic diagram of double freedom circular arc type piezoelectric type energy collector is as shown in Figure 4, it is seen then that multiple degrees of freedom circular arc
Type piezoelectric energy collector is advanced optimized on the basis of double freedom circular arc type piezoelectric type energy collector, and increase is passed through
Multiple cantilever beams, multi-direction collection energy.Output voltage and resonant frequency relational graph are made respectively, as shown in figure 5, double freedom
The one class resonant frequency of circular arc type piezoelectric energy collector is 43Hz, and the voltage exported at this time is 0.51V.Multiple degrees of freedom circular arc type
The relationship of voltage and frequency of the piezoelectric type energy collector on x, y, z axis is respectively as shown in Fig. 6 and Fig. 7 and Fig. 8, the horizontal seats of Fig. 6
Mark indicates that frequency, ordinate indicate that voltage, Fig. 7 abscissas indicate that frequency, ordinate indicate that voltage, Fig. 8 abscissas indicate frequency,
Ordinate indicates voltage.
Design parameter value is shown in Table 1：
1 multiple degrees of freedom circular arc type piezoelectric energy collector three-dimensional voltage of table and frequency
| Fundamental frequency（Hz） | Second order frequency（Hz） | Second order frequency（Hz） | Output voltage（V） | |
| X-axis | 15 | 25 | 61 | 0.65 |
| Y-axis | 17 | 26 | 64 | 0.12 |
| Z-axis | 19 | 28 | 65 | 0.28 |
As it can be seen that multistage frequency bandwidth is relatively narrow in all directions for multiple degrees of freedom energy harvester, one class resonant frequency is relatively low.
Double freedom and the comparison of multivariant structural parameters are as shown in table 2：
2 multiple degrees of freedom circular arc type piezoelectric energy collector three-dimensional voltage of table and frequency
| Fundamental frequency（Hz） | Fundamental frequency（Hz） | Output voltage（V） | |
| Double freedom energy harvester | 43 | 118 | 0.51 |
| Multiple degrees of freedom energy harvester（Z-axis） | 19 | 28 | 0.28 |
As can be seen from Table 2, the one class resonant frequency of multiple degrees of freedom energy harvester is lower, multistage bandwidth is relatively low.In summary
The energy harvester of the technical program uses the circular arc type structure that multiple radians are 90 °, is designed to spring-like.Work as incentive action
When mass block, the circular arc type piezoelectric energy collector of specific arc generates higher potential, and one class resonant frequency is relatively low, multistage
Bandwidth is shorter, which can absorb the vibrational energy on three-dimensional, improves energy suction
It produces effects rate, researching value and application prospect are higher.
Still there are many embodiment, all technical sides formed using equivalents or equivalent transformation by the present invention
Case is within the scope of the present invention.
Claims (10)
1. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector, it is characterised in that：Including first layer cantilever beam（1）, the second layer
Cantilever beam（2）With third layer cantilever beam（3）, first layer cantilever beam is centrosymmetric with second layer cantilever beam；Second layer cantilever beam
It is centrosymmetric with third layer cantilever beam and constitutes spring-like.
2. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：Described first
Layer cantilever beam（1）Including the first circular arc type thin slice（11）With the second circular arc type thin slice（12）, the one of the first circular arc type thin slice
End is connected with the first square sheets（13）, the other end the second circular arc type thin slice of connection of first square sheets（12）,
The other end of second circular arc type thin slice connects the second square sheets（14）, the first circular arc type thin slice and the second circular arc type are thin
On piece is attached with the first piezoelectric layer respectively（111）With the second piezoelectric layer（121）.
3. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：Described first
The first mass block is provided in square sheets（131）, the second mass block is provided in second square sheets（141）.
4. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：Described second
Layer cantilever beam（2）Including third circular arc type thin slice（20）With the 4th circular arc type thin slice（21）, the one of the third circular arc type thin slice
End is connected with third square sheets（100）, the other end of the third circular arc type thin slice is connected with the 4th square sheets
（200）, the other end the 4th circular arc type thin slice of connection of the 4th square sheets, the third circular arc type thin slice（20）With
Four circular arc type thin slices（21）It is upper to be attached with third piezoelectric layer and the 4th piezoelectric layer, second mass block respectively（141）Top is attached
It and is provided with the 5th square sheets（300）, the 5th square sheets are for connecting second layer cantilever beam（2）, described
Three square sheets（100）On be provided with third mass block（101）, the 4th mass is provided in the 4th square sheets
Block.
5. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 4, it is characterised in that：Described
Attachment is provided with the 6th square sheets on three mass blocks（400）, the 6th square sheets（400）For connecting third layer
Cantilever beam（3）, the third layer cantilever beam（3）Including the 6th circular arc type thin slice（31）With the 7th circular arc type thin slice, the described 6th
Circular arc type thin slice（31）One end be connected with the 6th square sheets, the 7th circle of other end connection of the 6th square sheets
The other end of camber thin slice, the 7th circular arc type thin slice connects the 7th square sheets, the 6th circular arc type thin slice and the 7th circle
The 6th piezoelectric layer and the 7th piezoelectric layer, the 6th circular arc type thin slice and the 7th circular arc type thin slice are attached on camber thin slice respectively
On be respectively arranged with the 6th mass block and the 7th mass block.
6. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：The cantilever
Beam is made of phosphor bronze material.
7. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：The circular arc
The internal diameter of shape thin slice is 20mm, outer diameter 30mm, thickness 0.5mm, and circular arc degree is 90 degree.
8. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：The piezoelectricity
Layer is PZT-5H.
9. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：The piezoelectricity
The internal-and external diameter of layer is respectively 20mm, 30mm, and thickness 0.3mm, circular arc degree is 90 degree.
10. a kind of multiple degrees of freedom circular arc type piezoelectric energy collector according to claim 1, it is characterised in that：The matter
Gauge block is made of nickel material, and the length of the mass block is respectively 10mm, 10mm, 10mm.
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| CN201810408685.1A CN108390590B (en) | 2018-05-02 | 2018-05-02 | Multi-degree-of-freedom arc piezoelectric energy collector |
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| CN201810408685.1A CN108390590B (en) | 2018-05-02 | 2018-05-02 | Multi-degree-of-freedom arc piezoelectric energy collector |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012145279A2 (en) * | 2011-04-19 | 2012-10-26 | Eastman Kodak Company | Energy harvesting device including mems composite transducer |
| CN104022687A (en) * | 2014-06-16 | 2014-09-03 | 金陵科技学院 | Multi-directional broadband vibration energy collecting device based on self-excited vibration mechanism |
| CN107919816A (en) * | 2017-12-18 | 2018-04-17 | 南京邮电大学 | Double freedom circular arc type piezoelectric energy collector |
| CN208316599U (en) * | 2018-05-02 | 2019-01-01 | 南京邮电大学 | A kind of multiple degrees of freedom circular arc type piezoelectric energy collector |
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2018
- 2018-05-02 CN CN201810408685.1A patent/CN108390590B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012145279A2 (en) * | 2011-04-19 | 2012-10-26 | Eastman Kodak Company | Energy harvesting device including mems composite transducer |
| CN104022687A (en) * | 2014-06-16 | 2014-09-03 | 金陵科技学院 | Multi-directional broadband vibration energy collecting device based on self-excited vibration mechanism |
| CN107919816A (en) * | 2017-12-18 | 2018-04-17 | 南京邮电大学 | Double freedom circular arc type piezoelectric energy collector |
| CN208316599U (en) * | 2018-05-02 | 2019-01-01 | 南京邮电大学 | A kind of multiple degrees of freedom circular arc type piezoelectric energy collector |
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