CN104065303B - Piezoelectricity bistable state energy harvester - Google Patents
Piezoelectricity bistable state energy harvester Download PDFInfo
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- CN104065303B CN104065303B CN201410335356.0A CN201410335356A CN104065303B CN 104065303 B CN104065303 B CN 104065303B CN 201410335356 A CN201410335356 A CN 201410335356A CN 104065303 B CN104065303 B CN 104065303B
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Abstract
A kind of piezoelectricity bistable state energy harvester, belongs to renewable energy power generation technical field.Described energy harvester is made up of, by wired in series between several piezoelectrics bistable state arc plate and several piezoelectrics being bonded in its surface.Energy harvester provided by the invention has two kinds of Stable structures, piezoelectric is attached on this kind of bistable structure, utilize the feature of its circular arc deformation distributing equilibrium, the strain deformation of the piezoelectric of attached thereto can be made to be evenly distributed, piezoelectric can be made full use of, make piezoelectric obtain largest deformation, produce maximum power, therefore can produce high efficiency power conversion.The present invention is practical, adopts piezoelectricity bistable state energy harvester of the present invention to may be used for piezoelectric energy and collects, have the advantages that efficiency is high, simple.
Description
Technical field
The invention belongs to renewable energy power generation technical field, relate to a kind of piezoelectric energy converting structure.
Background technology
Along with the continuous consumption of traditional energy, directly cause the global problem of environmental pollution and energy scarcity, therefore the acquisition of regenerative resource and utilization receive increasing concern.Piezoelectric has good power electric conversion properties, can realize the conversion of mechanical energy to electric energy, have a wide range of applications in collection of energy field.CN100414808C discloses the cantilever beam structure that a kind of two sides pressing electric material free end hangs lumped mass block, can collect vibrational energy, but the electric energy produced is less.CN101997444A also discloses a kind of similar Piezoelectric Cantilever Beams.CN103354434A discloses a kind of bistable vibration in piezoelectric cantilever beam energy harvester.Be that Strain Distribution is uneven for problem ubiquitous in the piezoelectric energy collecting device of beam type, the strain of stiff end is comparatively large, and free end strain is less, and make the potential that can not give full play to piezoelectric, generating efficiency is not high.
Summary of the invention
The object of this invention is to provide a kind of piezoelectricity bistable state energy harvester, it has two kinds of Stable structures, piezoelectric is attached on this kind of bistable structure, utilize the feature of its circular arc deformation distributing equilibrium, the strain deformation of the piezoelectric of attached thereto can be made to be evenly distributed, can piezoelectric be made full use of, make piezoelectric obtain largest deformation, produce maximum power, therefore can produce high efficiency power conversion.
The object of the invention is to be achieved through the following technical solutions:
A kind of piezoelectricity bistable state energy harvester, is made up of, by wired in series between several piezoelectrics bistable state arc plate and several piezoelectrics being bonded in its surface.
In aforementioned piezoelectricity bistable state energy harvester, described bistable state arc plate adopts composite material and metal hybrid laying, solidifies, because residual thermal stress can form circular arc bi-stable effect after cooling at composite material solidification temperature.
In aforementioned piezoelectricity bistable state energy harvester, described laying is made up of composite material symmetric layups and metallic composite hybrid ply, and the both sides of composite material symmetric layups are the metallic composite hybrid ply of size symmetrical.
In aforementioned piezoelectricity bistable state energy harvester, described composite material symmetric layups is 90 ° and 0 ° of composite material symmetric layups, wherein 90 ° of composite layers are in outside, and 0 ° of composite layer is in the middle of 90 ° of composite layers, and concrete overlay thickness can be changed by required curvature.
In aforementioned piezoelectricity bistable state energy harvester, described metallic composite hybrid ply is made up of 90 ° of composite layers, metal level, 90 ° of composite layers successively.
In aforementioned piezoelectricity bistable state energy harvester, the gross thickness of 0 ° of described composite layer is identical with the thickness of metal level, and in two kinds of layings, 90 ° of layer thicknesses are identical simultaneously.
In aforementioned piezoelectricity bistable state energy harvester, described metallic composite hybrid ply and the size adjustable of composite material symmetric layups obtain desirable curvature.
In aforementioned piezoelectricity bistable state energy harvester, described composite material is carbon fiber resin composite material or glass fiber resin compound material.
In aforementioned piezoelectricity bistable state energy harvester, described metal is the light metals such as aluminum or aluminum alloy.
In aforementioned piezoelectricity bistable state energy harvester, described piezoelectric is bondd by the mode of solidifying together when preparing bistable state plate, also can solidify rear stickup, depend on piezoelectric Curie temperature.For keeping the symmetry of bistable state housing, upper and lower surface pastes the identical piezoelectric of quantity in same position symmetry, can increase generating efficiency by the quantity increasing piezoelectric.
In aforementioned piezoelectricity bistable state energy harvester, described piezoelectric can be piezoelectric ceramic, piezoelectric chip or piezoelectric membrane.As long as the piezoelectric with piezoelectric constant and high electromechanical coupling factor and dielectric constant all can be used for preparing piezoelectricity bistable state energy harvester of the present invention.
The present invention adopts composite material and metal hybrid laying, after utilizing its solidification, residual thermal stress produces the circular arc plate with certain curvature, this kind of plate can carry out by lower external applied load the circular arc plate that saltus step produces another kind of same curvature in theory, therefore this circular arc plate has two kinds of stable states, by the saltus step back and forth between two kinds of stable states of lower external applied load.Piezoelectric is attached to this kind of bistable state arc plate surface, the deformation being circular arc therefore piezoelectric due to plate is all uniform, is driven, piezoelectric can be made to produce deformation along with the saltus step of bistable state plate, thus produce electric energy by external applied load.This kind of piezoelectricity bistable state energy harvester has larger deformation compared with cantilever beam structure, therefore has higher generating efficiency.
The present invention is practical, adopts piezoelectricity bistable state energy harvester of the present invention to may be used for piezoelectric energy and collects, have the advantages that efficiency is high, simple.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of piezoelectricity bistable state energy harvester of the present invention;
Fig. 2 is the three-dimensional structure schematic diagram before bistable state plate of the present invention solidification;
Fig. 3 is the schematic diagram of bistable state plate ply sequence of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described; but be not limited thereto; everyly technical solution of the present invention modified or equivalent to replace, and not departing from the spirit and scope of technical solution of the present invention, all should be encompassed in protection scope of the present invention.
Embodiment one: present embodiment provides a kind of high efficiency piezoelectricity bistable state energy harvester, comprises bistable state arc plate 1 and several piezoelectrics 2 being bonded in its surface.
Originally execute in routine execution mode, before described piezoelectricity bistable state energy harvester solidification be flat rectangular plate as shown in Figure 2, solidifying afterwards is circular arc, and have the stable state of two kinds of shapes after solidification, as shown in Figure 1, top is the first stable state, and below is the second stable state.Wherein, as shown in Figure 3, the top of figure is laying vertical view to the concrete ply sequence of bistable state arc plate 1, and below is the profile of zones of different laying.Laying is divided into two regions, and I region is fibrous composite symmetric layups, and wherein 90 ° of fiber composite layer 3 are in outside, and 0 ° of fiber composite layer 4 is in centre, as [90
2/ 0
2/ 90
2]; II region is metallic fiber miscellaneous area, same 90 ° of fiber composite layer 3 in outside, metal Al layer 5 in centre, as [90
2/ Al/90
2].It should be noted that in I region, the thickness of 0 ° of fibrous composite laying should be identical with the thickness of II regional metal Al in order to keep consistency of thickness, and 90 ° of fiber composite layer are at two regions skin symmetric layups.And in order to ensure symmetry thus ensure to obtain two kinds of identical stable shapes, the size of the metallic fiber miscellaneous area II of both sides, fiber symmetric layups I region is identical symmetries.
Embodiment two: present embodiment and embodiment one unlike, adopt piezoelectric ceramic piece as piezoelectric 2, before curing, by 9 piezoelectric ceramic piece symmetrical layings in the centre of bistable state arc plate 1 one side surface, as shown in Figure 2, the same piezoelectric ceramic piece pasting identical number in the same position on bistable state arc plate 1 opposite side surface, by the mode of solidifying together, piezoelectric ceramic and bistable state arc plate 1 are bonded together, finally utilize wire to be together in series by all piezoelectric ceramic pieces.
Owing to adopting carbon fibre composite in present embodiment, can directly utilize bistable state plate as an electrode.In the effect lower piezoelectric bistable state energy harvester saltus step between two kinds of stable states to and fro of external applied load, and then make the continuous deformation of piezoelectric ceramic produce electric energy, realize the conversion to energy.Produced electric energy can be carried out storage recycling finally by rectification circuit.
Claims (9)
1. a piezoelectricity bistable state energy harvester, it is characterized in that described energy harvester is made up of bistable state arc plate and several piezoelectrics being bonded in its surface, wired in series is passed through between several piezoelectrics, laying is made up of composite material symmetric layups and metallic composite hybrid ply, and the both sides of composite material symmetric layups are the metallic composite hybrid ply of size symmetrical.
2. piezoelectricity bistable state energy harvester according to claim 1, is characterized in that described bistable state arc plate adopts composite material and metal hybrid laying.
3. piezoelectricity bistable state energy harvester according to claim 1, it is characterized in that described composite material symmetric layups is 90 ° of composite materials and 0 ° of composite material symmetric layups, wherein 90 ° of composite layers are in outside, 0 ° of composite layer is in the middle of 90 ° of composite layers, and described metallic composite hybrid ply is made up of 90 ° of composite layers, metal level, 90 ° of composite layers successively.
4. piezoelectricity bistable state energy harvester according to claim 3, is characterized in that the gross thickness of 0 ° of described composite layer is identical with the thickness of metal level.
5. the piezoelectricity bistable state energy harvester according to claim 1 or 2 or 3 or 4, is characterized in that described composite material is carbon fiber resin composite material or glass fiber resin compound material.
6. the piezoelectricity bistable state energy harvester according to claim 1 or 2 or 3 or 4, is characterized in that described metal is light metal.
7. piezoelectricity bistable state energy harvester according to claim 6, is characterized in that described light metal is aluminum or aluminum alloy.
8. piezoelectricity bistable state energy harvester according to claim 1, is characterized in that the upper and lower surface of described bistable state plate pastes the identical piezoelectric of quantity in same position symmetry.
9. the piezoelectricity bistable state energy harvester according to claim 1 or 8, is characterized in that described piezoelectric is piezoelectric ceramic, piezoelectric chip or piezoelectric membrane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335356.0A CN104065303B (en) | 2014-05-28 | 2014-07-15 | Piezoelectricity bistable state energy harvester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410228675.1A CN103956936A (en) | 2014-05-28 | 2014-05-28 | Piezoelectric bi-stable-state energy collector |
| CN201410228675.1 | 2014-05-28 | ||
| CN201410335356.0A CN104065303B (en) | 2014-05-28 | 2014-07-15 | Piezoelectricity bistable state energy harvester |
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| CN104065303A CN104065303A (en) | 2014-09-24 |
| CN104065303B true CN104065303B (en) | 2016-01-27 |
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| CN201410335356.0A Active CN104065303B (en) | 2014-05-28 | 2014-07-15 | Piezoelectricity bistable state energy harvester |
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| CN104536534B (en) * | 2015-01-19 | 2017-08-22 | 张文明 | Electronic equipment pose adjustment device based on bistable structure |
| CN105235302B (en) * | 2015-11-06 | 2018-05-25 | 青岛阿斯顿工程技术转移有限公司 | A kind of bistable state merges carbon fibre reinforced composite |
| CN106531565B (en) * | 2016-11-07 | 2018-10-19 | 戴煊 | It is a kind of energy-saving and can collection of energy bistable electromagnetic relay |
| CN107623463A (en) * | 2017-10-24 | 2018-01-23 | 安徽理工大学 | Bistable state piezoelectric energy recovery device |
| CN107863904A (en) * | 2017-12-21 | 2018-03-30 | 安徽理工大学 | Bistable state piezoelectricity-Electromagnetic heating collection of energy structure |
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| CN201821288U (en) * | 2010-10-26 | 2011-05-04 | 温州大学 | Piezoelectric energy collecting device |
| CN102668598A (en) * | 2009-12-15 | 2012-09-12 | 日本电气株式会社 | Actuator, piezoelectric actuator, electronic device, and method for attenuating vibration and converting vibration direction |
| WO2013064841A1 (en) * | 2011-11-04 | 2013-05-10 | Altenergis Plc | Piezoelectric energy harvesting device or actuator |
| CN103296923A (en) * | 2013-06-04 | 2013-09-11 | 中国科学院上海硅酸盐研究所 | Magnet-free bistable piezoelectric transducer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2990320B1 (en) * | 2012-05-07 | 2014-06-06 | Commissariat Energie Atomique | DIGITAL SPEAKER WITH IMPROVED PERFORMANCE |
| US9438139B2 (en) * | 2012-08-06 | 2016-09-06 | Board Of Trustees Of Michigan State University | Energy harvesting devices for low frequency applications |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102668598A (en) * | 2009-12-15 | 2012-09-12 | 日本电气株式会社 | Actuator, piezoelectric actuator, electronic device, and method for attenuating vibration and converting vibration direction |
| CN201821288U (en) * | 2010-10-26 | 2011-05-04 | 温州大学 | Piezoelectric energy collecting device |
| WO2013064841A1 (en) * | 2011-11-04 | 2013-05-10 | Altenergis Plc | Piezoelectric energy harvesting device or actuator |
| CN103296923A (en) * | 2013-06-04 | 2013-09-11 | 中国科学院上海硅酸盐研究所 | Magnet-free bistable piezoelectric transducer |
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| CN103956936A (en) | 2014-07-30 |
| CN104065303A (en) | 2014-09-24 |
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