CN106899232A - Low frequency bistable state composite panel piezoelectric generating device - Google Patents
Low frequency bistable state composite panel piezoelectric generating device Download PDFInfo
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- CN106899232A CN106899232A CN201710226500.0A CN201710226500A CN106899232A CN 106899232 A CN106899232 A CN 106899232A CN 201710226500 A CN201710226500 A CN 201710226500A CN 106899232 A CN106899232 A CN 106899232A
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- Prior art keywords
- substrate
- bistable state
- composite panel
- piezoelectric
- generating device
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- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 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 3
- 239000000463 material Substances 0.000 claims description 13
- 239000002033 PVDF binder Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims 1
- 239000004917 carbon fiber Substances 0.000 claims 1
- 230000005494 condensation Effects 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 1
- 239000011120 plywood Substances 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009466 transformation Effects 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
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
It is a kind of device that vibrational energy is converted into electric energy the invention discloses a kind of low frequency bistable state composite panel piezoelectric generating device；Described device includes substrate, piezoelectric layer, mass and electrode；It is fixed on pedestal in the middle of substrate, extraneous vibration causes the vibration of substrate, the vibration of substrate to cause the deformation of piezoelectric layer, can be because of piezo-electric effect generation electric energy when piezoelectric layer is deformed upon；Piezoelectric layer is not exclusively layed in the middle of substrate using special ratios, substrate corner bonding quality block, causes this device to have relatively low vibration frequency and larger amplitude, so that not influenceing the generating efficiency of device while resonant frequency reduction；Using bistable state plate unintentional nonlinearity characteristic, make composite panel that accidental resonance to occur in ambient vibration excitation, generating efficiency is greatly improved, and can be used for MEMS.
Description
Technical field
The present invention relates to a kind of low frequency bistable state composite panel piezoelectric generating device, shaking for surrounding environment can be effectively collected
Dynamic mechanical energy is generated electricity, and belongs to power-saving technology and regenerated environment protecting new energy field.
Background technology
With the fast development of micro-electromechanical technology, from environment capture energy for low power consuming devices power or be battery supply
Electricity has turned into urgent demand；Conventional batteries are powered with a series of drawback, such as short life, need to regularly replace, pollute
Environment etc.；Which bar drawback all has a strong impact on the development of microelectric technique；Therefore, it is electricity to produce energy using ambient vibration
It is necessary that sub- equipment is powered.
Because bistable state plate has saltus step behavior in vibration processes, amplitude is relatively large, and its application is worth people to be closed
Note.Chinese invention application (publication number CN104079208A) discloses a kind of in low speed water impact lower piezoelectric TRT and side
Method, composite piezoelectric bistable state plate is directly impacted using low speed water, drives composite piezoelectric bistable state plate as low speed water is two
Reciprocal transformation between stable state is planted, and then so that is produced electric energy after piezoelectric generation deformation and is collected, this invention is realized low speed
Wave energy is converted into the function of electric energy；Chinese invention application (publication number CN104079207A) discloses a kind of capture vertical direction
The piezoelectric generating device and method of wave energy, with foregoing invention in addition to the difference in structure, electricity generating principle is the same for the invention
, generated electricity also with the saltus step behavior of bistable state plate, all it is the TRT that low-speed waves can be converted into electric energy.China
Patent application (publication number CN102790548A) discloses a kind of bistable composite cantilever beam piezoelectric generating device, and the invention is used
Bistable state beam generates electricity as oscillator, and bistable state plate is because the amount of deflection of plate when it vibrate is than larger, and piezoelectric layer laying area is greatly,
Therefore, bistable state plate piezoelectric generating device generated energy can be bigger, and generating efficiency can be higher.
The content of the invention
The purpose of the present invention is：There is provided a kind of new efficient bistable state composite panel piezoelectric generating device,
The intrinsic frequency of bistable state composite panel should be reduced, the generated energy when system is excited is increased again, it is contemplated that seeking
Seek the optimal paving mode and ratio of bistable state composite panel.
In order to solve the above mentioned problem of bistable state composite panel TRT, the solution that the present invention is given is as follows：
For in the intrinsic frequency problem for reducing bistable state composite panel, the experimental program that the present invention is used is double low frequency
Metastable composite plate piezoelectric generating device, mass (2) is added in substrate (3) surrounding, and substrate (3) material is fine bistable state carbon
Dimension laminate, and mass (2) material is the one kind in brass, steel, titanium alloy, aluminum or aluminum alloy, piezoelectric layer (1) is laid on base
The centre of plate (3)；The material of piezoelectric layer (1) is PVDF piezoelectric membranes.Electrode (4) is respectively attached to two faces of piezoelectric layer (1)
On, drawn by lead and form electric current.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, using bistable state composite panel piezoelectric power generation system unintentional nonlinearity characteristic, in ambient vibration incentive action
Under bistable state composite panel is resonated, compared with conventional piezoelectric TRT, the non-linear behavior of bistable state plate system
Become apparent, so the electricity for producing is also relatively more.
2nd, TRT of the present invention can absorb the various mechanical energy of surrounding environment, and existing technology is that wave energy is converted
It is electric energy, compared to existing technology, applicability of the present invention is wider, more simplifies flexibly, it is easy to process, and can be used for micro electronmechanical
Structure.
3rd, in existing patent of invention, the piezoelectric generating device with cantilever beam as oscillator has a lot, and cantilever beam has frequency
Low the characteristics of, but it is also fewer with the piezoelectric generating device of bistable state composite panel, and certainly, bistable state plate and bistable state beam have
Very big general character, can all have electricity higher to export compared to conventional piezoelectric TRT, but bistable state composite panel piezoelectricity is sent out
Electric installation is the piezoelectric generating device of oscillator compared to cantilever beam, due to the big advantage of its piezoelectric layer laying area, generating efficiency meeting
Greatly improve.
Brief description of the drawings
Fig. 1 is the front view of the piezoelectric generating device of bistable state composite panel in the present invention；
Fig. 2 is the top view of the piezoelectric generating device of bistable state composite panel of the present invention；
Fig. 3 is the stereogram of the piezoelectric generating device of bistable state composite panel of the present invention；
Fig. 4 is the piezoelectric layer generated energy performance chart of difference laying ratio of the invention；
Fig. 5 is the intrinsic frequency comparison diagram that apparatus of the present invention load different size mass；
In figure：1st, piezoelectric layer, 2, mass, 3, substrate, 4, electrode.
Specific embodiment
The present invention is described in further detail with reference to specific embodiment.
As shown in figure 1, low frequency bistable state composite panel piezoelectric generating device, the device is mainly including substrate (3), piezoelectricity
Layer (1), mass (2) and electrode (4)；The device substrate (3) uses bistable state composite panel, and the substrate (3) is for just
Square plate, thickness is 0.5mm, centre can thread mill drilling, substrate (3) is fixed on pedestal by screw；The corner of substrate (3)
It is bonded with four square masses (2)；And mass (2) paving location can not be too near apart from piezoelectric layer, in order to avoid maximum stress
Piezoelectric layer (1) edge is concentrated on, system tear failure is caused.Piezoelectric layer (1) is the square film made by piezoelectric, greatly
Small is 48mm, is layed in substrate (3) middle；Electrode (4) is respectively attached on two faces of piezoelectric layer (1), is drawn by lead
Form electric current.
Piezoelectric layer (1) the material selection PVDF piezoelectric membranes；Substrate (3) material is brass, steel, titanium alloy, aluminium
With the one kind in aluminium alloy；Mass (2) material is consistent with substrate (3) material, and the electrode (4) is laid for copper mesh.
When piezoelectric generating device is subject to external mechanical vibrations excitation to resonate, extraneous vibration causes substrate (3)
Vibration, the vibration of substrate (3) can cause the deformation of piezoelectric layer (1), and electricity can be produced because of piezo-electric effect when piezoelectric layer (1) is deformed upon
Energy；Causing this device has relatively low vibration frequency and larger amplitude, so that not influenceed while resonant frequency reduction
The generating efficiency of device.
In order to investigate the relation of system generated energy size and piezoelectric layer laying length, select with 9 kinds of different size of piezoelectricity
Layer, the dimension scale of the piezoelectric layer (1) of initial setting is respectively the 0.2 of substrate (3) total length, 0.3,0.4,0.5,0.6,0.7,
0.8,0.9,1.Substrate corner is bonded three kinds of floor space length of sides for 15mm respectively, and thickness is respectively 5mm, the aluminum of 10mm, 15mm
Mass (2).Accompanying drawing 1 is the sectional view of the TRT, and Fig. 2 is the top view of the invention device, and Fig. 3 is the invention device
Stereogram, and the present apparatus is arranged on vibrator, a certain amount of excitation is given, system output voltage just can be measured, and pass through
Frequency sweep can measure the intrinsic frequency of system；And by collecting experimental data, draw out the generating of different laying ratio piezoelectric layers
Efficiency curve diagram is as shown in Figure 4；Fig. 5 is comparison diagram before and after intrinsic frequencies plus three kinds of different-thickness masses, by Fig. 4 and
Fig. 5 can obtain two conclusions：
1st, system is substantially reduced plus intrinsic frequency after mass, for three kinds of masses of thickness (2), as laying 15mm
During mass (2) of thickness, the intrinsic frequency of bistable state composite panel is minimum, therefore in the range of the carrying of system, increases matter
The quality of gauge block (2) can further reduce system frequency.
2nd, as piezoelectric layer laying area increases, the generated energy of system is bigger, when the laying length ratio of piezoelectric layer (1) exists
When 0.48, system output voltage gets peak, afterwards because the increase of piezoelectric layer causes that system stiffness increases, therefore plate
Amount of deflection reduction, cause generated energy no longer with piezoelectric layer area increase and increase.
Therefore an optimal laying scheme is obtained by experiment conclusion, i.e.,：When piezoelectric layer (1) laying length ratio is 0.48
When, system Energy Maximization.And frequency reducing is carried out to system by the method for substrate (4) corner load mass block.
For on the On The Choice of mass (2)：Because mass (2) quality is bigger, bistable state composite panel is consolidated
There is frequency just smaller, so the intrinsic frequency of device is further reduced by increasing the method for mass (2) quality, but matter
The increase simply of gauge block (2) quality will certainly cause fixing end stress concentration in the middle of system, cause the stability of a system not enough, so that
System failure is caused, therefore strength check and Stiffness evaluation should be carried out to system before, after system addition mass (2) most
Big stress should be less than the allowable stress of substrate (3) material, and the amount of deflection that system own wt triggers should be less than the allowable of baseplate material
Amount of deflection, typically may not exceed substrate quality, can voluntarily be adjusted according to actual conditions.
In sum：Low frequency bistable state composite panel piezoelectric generating device of the present invention, after being adjusted through load mass block
Intrinsic frequency is relatively low, can be easier to be influenceed to resonate by extraneous vibration, and the piezo-electric device is subject to extraneous vibration to encourage generation
Voltage it is also very big, using bistable state plate unintentional nonlinearity characteristic, there is composite panel in ambient vibration excitation random
Resonance, generating efficiency is significantly improved.
Low frequency bistable state composite panel structure of the invention can be used for micro electronmechanical product, such as wireless sensor node, fly
Row device and satellite component etc., it can also be used to movement power generation, such as sports shoe bottom are equipped with piezoelectric generating device or road paving pressure
Electric TRT etc..
Claims (5)
1. low frequency bistable state composite panel piezoelectric generating device, it is characterised in that：The substrate (3) of the device is answered using bistable state
Condensation material plate, middle thread mill drilling, substrate (3) is fixed on pedestal by screw；The corner of substrate (3) is bonded with four together
Etc. the cuboid mass (2) of size, piezoelectric layer (1) is not exclusively layed in the middle of substrate (3)；Electrode (4) is respectively attached to pressure
On two faces of electric layer (1), drawn by lead and form electric current.
2. low frequency bistable state composite panel piezoelectric generating device according to claim 1, it is characterised in that：The piezoelectricity
Layer (1) material selection PVDF piezoelectric membranes；The material of the substrate (3) is bistable state carbon fiber layer plywood, the mass (2)
Material be the one kind in brass, steel, titanium alloy, aluminum or aluminum alloy；The electrode (4) is laid for copper mesh.
3. low frequency bistable state composite panel piezoelectric generating device according to claim 1, it is characterised in that：The substrate
(3) bistable state square plate is selected.
4. low frequency bistable state composite panel piezoelectric generating device according to claim 1, it is characterised in that the centre
The piezoelectric layer (1) made by PVDF piezoelectric membranes of laying is square shape.
5. low frequency bistable state composite panel piezoelectric generating device according to claim 1, it is characterised in that the laying
Mass (2) be rectangular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710226500.0A CN106899232B (en) | 2017-04-09 | 2017-04-09 | Low frequency bistable state composite panel piezoelectric generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710226500.0A CN106899232B (en) | 2017-04-09 | 2017-04-09 | Low frequency bistable state composite panel piezoelectric generating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106899232A true CN106899232A (en) | 2017-06-27 |
| CN106899232B CN106899232B (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710226500.0A Expired - Fee Related CN106899232B (en) | 2017-04-09 | 2017-04-09 | Low frequency bistable state composite panel piezoelectric generating device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106899232B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110418244A (en) * | 2019-08-29 | 2019-11-05 | 北京小米移动软件有限公司 | Electro-acoustic transducing device and the electronic equipment for applying it |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004236253A (en) * | 2003-02-03 | 2004-08-19 | Toyo Commun Equip Co Ltd | Dual-mode piezoelectric filter and manufacturing method therefor |
| CN102790548A (en) * | 2012-07-18 | 2012-11-21 | 天津大学 | Bistable composite cantilever beam piezoelectric power generating device |
| CN102983781A (en) * | 2012-12-20 | 2013-03-20 | 北京航空航天大学 | Piezoelectric vibratory energy harvester |
| CN106484097A (en) * | 2015-08-25 | 2017-03-08 | 意美森公司 | Bistable state tactile feedback generator |
-
2017
- 2017-04-09 CN CN201710226500.0A patent/CN106899232B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004236253A (en) * | 2003-02-03 | 2004-08-19 | Toyo Commun Equip Co Ltd | Dual-mode piezoelectric filter and manufacturing method therefor |
| CN102790548A (en) * | 2012-07-18 | 2012-11-21 | 天津大学 | Bistable composite cantilever beam piezoelectric power generating device |
| CN102983781A (en) * | 2012-12-20 | 2013-03-20 | 北京航空航天大学 | Piezoelectric vibratory energy harvester |
| CN106484097A (en) * | 2015-08-25 | 2017-03-08 | 意美森公司 | Bistable state tactile feedback generator |
Non-Patent Citations (1)
| Title |
|---|
| DAVID N.BETTS等: "Modelling the Dynamic Response of Bistable Composite Plates for Piezoelectric Energy Harvesting", 《55TH AIAA/ASME/ASCE/AHS/ASC STRUCTURES，STRUCTURAL DYNAMICS，AND MATERIALS CONFERENCE》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110418244A (en) * | 2019-08-29 | 2019-11-05 | 北京小米移动软件有限公司 | Electro-acoustic transducing device and the electronic equipment for applying it |
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| Publication number | Publication date |
|---|---|
| CN106899232B (en) | 2019-03-29 |
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Granted publication date: 20190329 |