CN209472569U - A kind of combined type piezoelectric harvester device of subsidiary quality frame - Google Patents
A kind of combined type piezoelectric harvester device of subsidiary quality frame Download PDFInfo
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- CN209472569U CN209472569U CN201920001597.XU CN201920001597U CN209472569U CN 209472569 U CN209472569 U CN 209472569U CN 201920001597 U CN201920001597 U CN 201920001597U CN 209472569 U CN209472569 U CN 209472569U
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- 239000000758 substrate Substances 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 13
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 5
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000003491 array Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001124569 Lycaenidae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
A kind of combined type piezoelectric harvester device of subsidiary quality frame, belongs to power-saving technology and regenerated environment protecting new energy field, the vibrating machine that ambient enviroment is collected by the deformation of piezoelectric material can be carried out power generation.The trapezoidal cantilever substrate (1) of the device uses alloy steel products flitch, and there is through-hole in side of going to the bottom, for connecting with fixed plate；Two trapezoidal cantilever substrate free ends are bonded with quality frame (5), and quality frame is rectangle framework, are bonded in structural outer, the upside of two trapezoidal substrates；Piezoelectric layer (2) is layed in each trapezoidal cantilever substrate (1) upper layer；Fixed plate is attached by the through-hole of two sides with trapezoidal substrate, is bolted by intermediate through-hole with support.The structure is compact to design, limited space is made full use of, suitable for wireless sensor system.
Description
Technical field
The utility model relates to a kind of combined type piezoelectric harvester devices of subsidiary quality frame, pass through the deformation of piezoelectric material
It can be carried out power generation to collect the vibrating machine of ambient enviroment, belong to power-saving technology and regenerated environment protecting new energy field.
Background technique
In recent years, as actual application environment changes and develops, power harvesting is that low power consumption equipment is powered from environment
As urgent need, energy accumulator has been had been applied in wireless sensor and miniature electronic component in real life, is led to
Confession power technology is realized in the application for crossing energy accumulator.For traditional battery, when the batteries have been exhausted, wireless sensor must just be replaced
Battery.In some cases, since the position of these equipment is very remote or sensor itself is arranged in and is very difficult to close position,
Battery is simply replaced to sensor is likely to become a very expensive or even impossible task.For these reasons, this
The research of energy accumulator and self-contained electric system is increasing sharply.Therefore, generating energy using ambient vibration as power electronic equipment is
It is necessary to.
Piezoelectric harvester improvement direction using cantilever sheet design design is always to possess lower intrinsic frequency and wider
Bandwidth, so design more effective structure prisoner can be improved can efficiency.However most piezoelectric harvesters still use at present
The structure of most basic cantilever slab free end additional mass, first three rank intrinsic frequency gap of this structure is larger, it is practical from
It is typically only capable to make its resonance using first natural frequency in right environment, therefore operating frequency band is very narrow.Therefore the direction studied at present
To use the structure type of modern that bandwidth of operation is made to broaden, trapping voltage is bigger.
Summary of the invention
The purpose of this utility model is: a kind of combined type piezoelectric harvester of subsidiary quality frame is provided, it is tight using structure
The form gathered increases cantilever slab number and piezoelectric patches number in certain space, can reduce the intrinsic frequency of energy accumulator
Rate, and open-circuit voltage when can increase the arrangement works, and become wide with the resonance frequency range of ambient enviroment, so that the energy accumulator
It is more suitable in microstructure.
1, a kind of combined type piezoelectric harvester device of subsidiary quality frame, it is characterised in that: the trapezoidal cantilever substrate of the device
(1) alloy steel products flitch is used, and there is through-hole in side of going to the bottom, for connecting with fixed plate；Two trapezoidal cantilever substrate free ends
It is bonded with quality frame (5), quality frame is rectangle framework, is bonded in structural outer, the upside of two trapezoidal substrates.Piezoelectric layer
(2) it is layed in each trapezoidal cantilever substrate (1) upper layer；Fixed plate is attached by the through-hole of two sides with trapezoidal substrate, is passed through
Intermediate through-hole is bolted with support.
2, further, piezoelectric layer (2) the material selection PVDF piezoelectric membrane；The trapezoidal substrate (1) and quality frame (5)
Material be one of steel alloy；Support is one of aluminum alloy.
3, further, trapezoidal cantilever substrate (1) shape is composite figure, is 7mm by upper bottom, is gone to the bottom as 15mm, height
For trapezoidal and a length of 15mm of 80mm, width is that the rectangle of 10mm is composed, overall length 90mm, with a thickness of 1mm.
4, further, the piezoelectric layer (2) being made by PVDF piezoelectric membrane being laid on trapezoidal cantilever substrate is ladder
Shape shape, upper bottom are 12.2mm, are gone to the bottom as 15mm, a height of 28mm, thickness 30um；Trapezoidal the trapezoidal of cantilever substrate is pasted onto lean on
The upper surface of nearly bottom one end.
5, further, the quality frame (5) of the laying is rectangle frame, and rectangle is having a size of long 100mm, wide 60mm；Frame
Width is 5mm, thick 2mm.
6, further, the fixed plate is zigzag plate, and the intermediate a length of 80mm of vertical section, width is the rectangle of 10mm,
Two sides lateral part is stretched out to two sides, is a length of 25mm, and width is the rectangle of 10mm；With a thickness of 2mm, there are three vertical sections
The through-hole for being symmetrically arranged and being 6mm at a distance of the diameter of 20mm, having a diameter respectively in lateral part is the through-hole of 6mm.
7, further, the support is inverted T font aluminum material, and vertical portion is a length of 80mm, width 10mm, a height of
The cuboid of 40mm；There are three be symmetrically arranged the simultaneously M6 threaded hole at a distance of 20mm, the through-hole pair with fixed plate for vertical portion top surface
It answers；Horizontal component is a length of 100mm, width 80mm, the cuboid of a height of 10mm.
Realizing the technical solution of the utility model is, a kind of combined type piezoelectric harvester of subsidiary quality frame, including cantilever
Trapezoidal substrate (1), piezoelectric patches (2), fixed plate (3), support (4) and quality frame (5) oppose two trapezoidal substrates of cantilever (1)
It is internal that title is arranged in quality frame (5), and is fixed on fixed plate (3) and support (4), and the vibration of environment is received by support
Excitation makes cantilever substrate generate vibration deformation, to make the piezoelectric patches pasted on it be deformed acquisition energy, in structure
Outside is quality frame, and quality frame and the free end of two cantilever trapezoidal plates bond together, and playing reduces the intrinsic of structure entirety
The effect of frequency.Make structure that bigger torsion occur in vibration by the antisymmetry arrangement of intermediate two trapezoidal cantilever versions, makes
The piezoelectric patches deformation being laid on it increases, and captures bigger voltage.For further decreasing fabricated structure piezoelectric harvester
Intrinsic frequency problem on, the utility model uses trapezoidal substrate, according to Finite Element Method Simulation result frequency significantly lower than general
Logical rectangular substrate.In an experiment, experimental program be paste frame of improving quality two cantilever substrate free ends, and cantilever substrate and
Quality frame selected materials are consistent, the experimental stage we using common aluminum plate, the piezoelectric layer that is laid on two cantilever substrates
Materials'use is PVDF piezoelectric membrane.The utility model investigates system generated energy size and system in terms of optimizable three
Ratio, the piezoelectric layer gone to the bottom in intrinsic frequency and trapezoidal plate are laid with the relationship of the spacing of area and two trapezoidal cantilever slabs.First party
We have chosen five groups of piezoelectric patches laying areas in face, and the ratio with cantilever slab editor is respectively 0.1,0.2,0.3,0.4,0.5,
Remaining condition is all the same, in the case where same load, tests the open-circuit voltage of piezoelectric patches, second aspect we have chosen six groups
The long bottom combination of cantilever substrate, it is always 15mm that wherein cantilever substrate fixing end, which is bottom, and upper bottom is respectively 3mm, 5mm, 7mm,
9mm, 11mm, 13mm choose optimization length combination by the intrinsic frequency and piezoelectric patches open-circuit voltage of six kinds of modes of comparison, herein
On the basis of we have chosen 3 kinds of different distances in terms of two trapezoidal substrate spacing, investigated spacing to structural natural frequencies and pressure
The influence of electric piece open-circuit voltage.Attached drawing 1 is the integrally-built perspective view of the invention, and Fig. 2 is the integrally-built three-view diagram of the invention
And portion size, Fig. 3 are the top views of fixed plate in the invention device.Device is mounted on vibration excitor in experiment, is given sharp
It encourages, piezoelectric patches open-circuit voltage can be measured by general-purpose change, and integrally-built intrinsic frequency can be measured by frequency sweep；It is logical
Collection experimental data is crossed, Fig. 4 is to compare in utility model device using rectangular substrate and first three rank intrinsic frequency of trapezoidal substrate
Figure, Fig. 5 are the piezoelectric patches open-circuit voltage comparison diagrams that two substrates are arranged using symmetric arrays with antisymmetry in utility model device,
Fig. 6 depicts piezoelectric layer in utility model device and is laid with the asynchronous structure output voltage-contrast figure of area ratio, and Fig. 7 is drawn
Using six kinds of upper bottom combinations to the influence diagrams of piezoelectric patches output voltage, Fig. 8 is drawn trapezoidal substrate in utility model device
Influence of the two trapezoidal substrate spacing to structural natural frequencies in utility model device.
It is available to draw a conclusion by Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8:
1, using that can reduce integrally-built intrinsic frequency when trapezoidal substrate, the first rank declines 13% under the size,
Second-order decline 14.7%, third rank decline 17.7%, decline effect is obvious, it may be said that bright effectively to be dropped using trapezoidal substrate
Low structural natural frequencies.
2, after the arrangement of two substrates antisymmetry, piezoelectric patches open-circuit voltage is improved, because after being arranged using antisymmetry
Construction torsion increases, and piezoelectric patches deformation is promoted to increase, therefore open-circuit voltage increases, and in the case where changing size, amplification is 13%.
3, increase as piezoelectric layer is laid with area, linear change, piezoelectric layer paved surface is not presented in the output voltage of system
System output voltage is maximum when product ratio is 0.3~0.4, therefore piezoelectric layer laying area selection percentage is in the utility model
0.35。
4, with the increase of two substrates spacing in structure, two rank intrinsic frequencies are without significant change before structure, and third rank is solid
Have the tendency that frequency has increase, but impact effect is little.
Can choose out a kind of optimum structure scheme by experiment conclusion: i.e. two cantilever slabs use trapezium structure, and make
It is arranged with antisymmetry, piezoelectric patches is laid with 35% that area is substrate, and the spacing of two substrates is due to influencing not integrality performance of the structure
Greatly, can flexibly be changed according to actual working environment, utility model device spacing is 10mm.
Utility model device is compact-sized to placed two parts piezoelectric patches and substrate in certain space, and uses
The form additional mass of quality frame reduces intrinsic frequency, can add bigger quality in the case where occupying less space
Block.
Compared with prior art, the utility model has the beneficial effects that the additional mass frame in 1, utility model device
It is looped around structure periphery, be different from common energy accumulator increases mass block in free end side, and the utility model can occupy
Assign mass block bigger quality (be equivalent to and convert dispersion by concentrating for the quality of mass block) in the lesser situation in space, because
This can further decrease the intrinsic frequency of structure, be conducive to collect vibrational energy.2, two in the utility model power generator
A piezoelectric cantilever designs are tapered in form, according to experiment it can be seen that being significantly lower than rectangular configuration in terms of intrinsic frequency, and
Being arranged using unique antisymmetry increases piezoelectric patches open-circuit voltage again, and the prisoner for improving energy accumulator can effect.3, existing hair
In bright patent, have much by the piezoelectric generating device of oscillator of cantilever beam, cantilever beam has the characteristics that frequency is low, but with cantilever slab
It is also fewer for piezoelectric generating device, but cantilever slab piezoelectric generating device is the piezoelectric generating device of oscillator compared to cantilever beam, by
It is laid with the big advantage of area in its piezoelectric layer, and two cantilever slabs in structure are connected in series, generating efficiency can greatly improve.4,
The utility model by the way of antisymmetry array additional mass frame, compared to be symmetrically arranged and one end arrangement frame mode,
In the identical situation of piezo area, the structure of the utility model is more compact, is more applicable for the lesser micro-electro-mechanical systems in space
In system.
Detailed description of the invention
Fig. 1 is a kind of perspective view of the combined type piezoelectric harvester of subsidiary quality frame of the utility model；
Fig. 2 is the utility model a kind of three-view diagram and portion size of the combined type piezoelectric harvester of subsidiary quality frame；
Fig. 3 is the top view and size of fixed plate in the utility model；
Fig. 4 is in utility model device using rectangular substrate and first three rank intrinsic frequency comparison diagram of trapezoidal substrate；
Fig. 5 is that substrate uses the piezoelectric patches open-circuit voltage comparison being symmetrically arranged with antisymmetry arrangement in utility model device
Figure；
Fig. 6 is that piezoelectric layer is laid with the asynchronous structure output voltage-contrast figure of area ratio in utility model device；
Fig. 7 is influence of the trapezoidal substrate using six kinds of upper bottom combinations to piezoelectric patches output voltage in utility model device
Figure；
Fig. 8 is influence of the two trapezoidal substrate spacing to structural natural frequencies in utility model device；
Specific embodiment
The utility model is described in further detail With reference to embodiment.
As shown in Figure 1, a kind of combined type piezoelectric harvester of subsidiary quality frame, the device mainly includes two trapezoidal cantilevers
Substrate (1), two piezoelectric layers (2), quality frame (5), fixed plate (3) and support (4)；Trapezoidal cantilever substrate (1) uses aluminum
Plate of material, the trapezoidal cantilever substrate (1) is composite figure plate, is 7mm by upper bottom with a thickness of 1mm, is gone to the bottom as 15mm, a height of
Trapezoidal and a length of 15mm of 80mm, width are that the rectangle of 10mm is composed, and overall length 90mm has diameter 6mm at rectangle end
Through-hole, be bolted by through-hole and the through-hole of fixed plate (3) two sides；The free end of each cantilever substrate and quality
Frame (5) bonds together；Fixed plate font steel plate for it, with a thickness of 2mm, in middle section, there are three be symmetrically arranged and at a distance of 20mm's
Diameter is the through-hole of 6mm, and having diameter in two sides is the through-hole of 6mm, and support is inverted T font aluminum material, and vertical portion top surface has three
A symmetric arrays and the threaded hole at a distance of 20mm, it is corresponding with the through-hole of fixed plate, so that fixed plate is fixed on branch using being bolted
On seat.Two piezoelectric layers (2) are the trapezoidal shape films being made by piezoelectric material PVDF, are layed in cantilever substrate close to fixing end
The upper layer of trapezoidal portions.
The piezoelectric generating device acquires the energy of the extraneous vibration energy, and structure is made to resonate with environment, extraneous first
Vibration causes the vibration of support (4) and two trapezoidal cantilever substrates (1), and trapezoidal cantilever substrate (1), which generates deformation, can cause two
The deformation of a piezoelectricity piece (2), piezoelectric layer (2) can be because piezoelectric effect produce electricl energy when deformation occurs；By electrode and hereafter apply
The electric energy of generation is supplied to other parts by the circuit of middle design, realizes application.
In summary: a kind of combined type piezoelectric harvester of subsidiary quality frame of the utility model, by rationally designing substrate
Shape and the form of additional mass frame significantly reduce structural natural frequencies, and energy accumulator is made to be easier to capture the vibration in environment
Energy is improved by the reasonable area that the arrangement mode and piezoelectric patches of trapezoidal substrate are laid in the size condition lower piezoelectric piece
Open-circuit voltage, the prisoner for improving energy accumulator can efficiency.
A kind of combined type piezoelectric harvester of subsidiary quality frame of the utility model can be used for various micro electronmechanical products, such as nothing
Line sensor internal self-powered, aircraft and satellite component etc. can be these components and reach self-powered effect, greatly
Ground reduces maintenance cost.
Claims (7)
1. a kind of combined type piezoelectric harvester device of subsidiary quality frame, it is characterised in that: the trapezoidal cantilever substrate (1) of the device is adopted
With alloy steel products flitch, and there is through-hole in side of going to the bottom, for connecting with fixed plate；Two trapezoidal cantilever substrate free ends are bonded with
Quality frame (5), quality frame are rectangle framework, are bonded in structural outer, the upside of two trapezoidal substrates；Piezoelectric layer (2) is laid with
In each trapezoidal cantilever substrate (1) upper layer；Fixed plate is attached by the through-hole of two sides with trapezoidal substrate, is led to by intermediate
Hole is bolted with support.
2. a kind of combined type piezoelectric harvester device of subsidiary quality frame according to claim 1, it is characterised in that: described
Piezoelectric layer (2) material selection PVDF piezoelectric membrane；The material of the trapezoidal cantilever substrate (1) and quality frame (5) is steel alloy
One of；Support is one of aluminum alloy.
3. a kind of combined type piezoelectric harvester device of subsidiary quality frame according to claim 1, it is characterised in that: described
Trapezoidal cantilever substrate (1) shape is composite figure, is 7mm by upper bottom, goes to the bottom as 15mm, a height of 80mm it is trapezoidal with it is a length of
15mm, width are that the rectangle of 10mm is composed, overall length 90mm, with a thickness of 1mm.
4. a kind of combined type piezoelectric harvester device of subsidiary quality frame according to claim 1, it is characterised in that: described
The piezoelectric layer (2) being made by PVDF piezoelectric membrane being laid on trapezoidal cantilever substrate is trapezoidal shape, and upper bottom is 12.2mm, under
Bottom is 15mm, a height of 28mm, thickness 30um；It is pasted onto the trapezoidal upper surface close to bottom one end of trapezoidal cantilever substrate.
5. a kind of combined type piezoelectric harvester device of subsidiary quality frame according to claim 1, it is characterised in that: described
The quality frame (5) of laying is rectangle frame, and rectangle is having a size of long 100mm, wide 60mm；Frame width is 5mm, thick 2mm.
6. a kind of combined type piezoelectric harvester device of subsidiary quality frame according to claim 1, it is characterised in that: described
Fixed plate is zigzag plate, and the intermediate a length of 80mm of vertical section, width is the rectangle of 10mm, and two sides lateral part is stretched out to two sides,
For a length of 25mm, width is the rectangle of 10mm；With a thickness of 2mm, in vertical section, there are three be symmetrically arranged simultaneously at a distance of the straight of 20mm
Diameter is the through-hole of 6mm, and having a diameter respectively in lateral part is the through-hole of 6mm.
7. a kind of combined type piezoelectric harvester device of subsidiary quality frame according to claim 1, it is characterised in that: described
Support is inverted T font aluminum material, and vertical portion is a length of 80mm, width 10mm, the cuboid of a height of 40mm；Vertical portion top
There is threaded hole in face, corresponding with the through-hole of fixed plate；Horizontal component is a length of 100mm, width 80mm, the cuboid of a height of 10mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109617452A (en) * | 2019-01-02 | 2019-04-12 | 北京工业大学 | A kind of combined type piezoelectric harvester device of subsidiary quality frame |
| CN113922702A (en) * | 2021-08-29 | 2022-01-11 | 北京工业大学 | Vibration-damping energy-harvesting integrated piezoelectric metamaterial plate |
-
2019
- 2019-01-02 CN CN201920001597.XU patent/CN209472569U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109617452A (en) * | 2019-01-02 | 2019-04-12 | 北京工业大学 | A kind of combined type piezoelectric harvester device of subsidiary quality frame |
| CN113922702A (en) * | 2021-08-29 | 2022-01-11 | 北京工业大学 | Vibration-damping energy-harvesting integrated piezoelectric metamaterial plate |
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