CN107623463A - Bistable state piezoelectric energy recovery device - Google Patents
Bistable state piezoelectric energy recovery device Download PDFInfo
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- CN107623463A CN107623463A CN201711002238.8A CN201711002238A CN107623463A CN 107623463 A CN107623463 A CN 107623463A CN 201711002238 A CN201711002238 A CN 201711002238A CN 107623463 A CN107623463 A CN 107623463A
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- piezoelectric
- cantilever beam
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- energy recovery
- circular arc
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Abstract
The invention discloses a kind of bistable state piezoelectric energy recovery device, belong to field of renewable energy.Described bistable state piezoelectric energy collector, the uniform sticking piezoelectric element on circular arc cantilever beam surface, cantilever beam installs piezoelectric actuator on surface, when extraneous vibration, circular arc cantilever beam surface produces homogeneous strain, and the mechanical strain on circular arc cantilever beam surface sufficiently can be changed into electric energy by piezoelectric element；Recycle piezoelectric actuator driving cantilever beam to change collection of energy state, allow its mutual saltus step between two kinds of stable states, and itself and energy recovering circuit are connected, form bistable state piezoelectric energy collector.The present invention has the features such as efficiency of energy collection is high, simple in construction.
Description
Technical field：
The present invention relates to a kind of bistable state piezoelectric energy recovery device, particularly a kind of bistable state piezoelectric energy recovery device
Ambient environment vibrations energy is reclaimed, belongs to renewable energy power generation technical field.
Background technology：
Vibration energy regeneration is that the vibrational energy in surrounding environment is converted into the electric energy that can be utilized, and is widely used in
In the micro energy lose system such as MEMS, with the development of technology of wireless sensing network, it leads in environmental monitoring, building, military affairs, automobile etc.
Domain is obtained for extensive utilization.But energy supply mode is still using chemical cell as major way, but because chemical cell is present
Need to regularly replace, volume is big, and recovery is difficult and the problems such as pollution environment, and piezoelectric energy recovery device have it is simple in construction,
Do not generate heat, without electromagnetic interference, it is easy to process make, realize being miniaturized of structure, it is integrated the features such as, therefore piezoelectric energy recovery
Turn into study hotspot.
In the prior art, piezoelectric energy recovery uses cantilever piezoelectric energy recycle device more.But cantilever piezoelectric
Energy recycle device Strain Distribution is uneven, general that piezoelectric patches progress energy regenerating is only pasted in the maximum root of mechanical strain,
Because other positions strain is smaller, typically can not all be effectively utilized, and when carrying out vibration energy harvesting, be merely able to
Vibrational energy is reclaimed under single stable state.So filled in the present invention using a kind of bistable state piezoelectric energy recovery
Put, the circular arc cantilever beam Strain Distribution of use is uniform, and there are two stable states to be collected ambient environment vibrations energy, improves
Efficiency of energy collection.
The content of the invention：
It is an object of the invention to provide a kind of simple in construction, stable performance, there is bistable state piezoelectric energy recovery device, it is real
Now the vibrational energy in environment in wide frequency range is collected.The method of bistable state piezoelectric energy recovery device be utilize etc. it is strong
Spend cantilever beam to produce homogeneous strain and switch two kinds of Stable structures using piezoelectric actuator, to improve to ambient environment vibrations energy
The efficiency of recovery.
To achieve the object of the present invention, the technical solution adopted by the present invention is as follows：
Realize that purpose of the present invention technical solution is, a kind of bistable state piezoelectric energy recovery device, the apparatus structure
Including：At least one circular arc cantilever beam, at least one piezoelectric actuator, at least one piezoelectric element, at least one pedestal, extremely
A few spring, cantilever beam, fixing end, piezoelectric energy collecting circuit.It is characterized in that：By designed circular arc piezoelectric cantilever
Beam one end is connected on a cantilever beam, and the other end is fixed, and cantilever beam and pedestal are linked together by spring, and in cantilever beam
Piezoelectric actuator is installed up and down and on the face of left and right, forms the bistable structure of piezoelectric energy recovery.Returned in bistable state piezoelectric energy
In receiving apparatus, circular arc piezoelectric cantilever upper and lower surface is pasted with piezoelectric element, forms piezoelectric bimorph structure, specifically by piezoelectricity member
Positioned at centre, metal level is that light metal aluminium or aluminium close for part, metal level, the sandwich structure of piezoelectric element composition, wherein metal level
Gold；Piezoelectric element is made up of the electrode of two sides coating, it is connected with piezoelectric energy recovery circuit in metal level both sides, is formed
Bistable state piezoelectric energy recovery device.
In bistable state piezoelectric energy recovery device, the vibrational energy in surrounding environment is converted into electric energy, passes through circular arc
Cantilever beam is acted on its surface by extraneous vibration and produces strain, and due to direct piezoelectric effect, mechanical vibrational energy is converted into electricity
Can, when the energy of collection deviates the energy collected near intrinsic frequency, you can with pressure of the drive installation on cantilever beam surface
Electric drive, in the presence of piezoelectric actuator, it will jump to another Stable structure from current steady state structure and be pressed
Electric flux collect, by the presence of piezoelectric actuator external applied load can the mutual saltus step between two kinds of Stable structures, its structure
Efficiency of energy collection will be greatly improved.
The present invention compared with the prior art, has following remarkable advantage：(1) the circular arc cantilever beam that the present invention uses, its
Circular arc piezoelectric has the characteristics of Strain Distribution is uniform, more effectively can be strained using caused by piezoelectric, it is tied
Structure is simple, and energy conversion efficiency is high,.(2) present invention uses piezoelectric actuator, under drive installation on a cantilever beam and left and right face
Piezoelectric actuator, thus it is possible to vary the state of cantilever beam, allow it to become back and forth in the environment of two kinds of stable states and change jobs.(3) it is of the invention
Mechanical vibrational energy in surrounding environment can be converted into electric energy by designed structure, be powered for other microelectronic components.
Brief description of the drawings：
Fig. 1 is a kind of bistable state piezoelectric energy recovery device of the present invention；
Fig. 2 is that the present invention pastes piezoelectric patches on circular arc cantilever beam；
Fig. 3 is that the present invention installs piezoelectric actuator on a cantilever beam.
In figure：1 arc cantilever beam, 2 cantilever beams, 3 piezoelectric actuators, 4 piezoelectric elements, 5 fixing ends, 6 pedestals, 7 springs, 8
Piezoelectric energy collecting circuit
Embodiment：
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
A kind of bistable state piezoelectric energy recovery device, the apparatus structure include：Arc cantilever beam 1, cantilever beam 2, piezoelectricity drive
Dynamic device 3, piezoelectric element 4, fixing end 5, pedestal 6, spring 7, piezoelectric energy collecting circuit 8.Designed circular arc piezoelectricity is hanged
Arm beam one end is connected on a cantilever beam, and the other end is fixed, and cantilever beam and pedestal are linked together by spring, and in cantilever beam
Upper and lower and left and right face on piezoelectric actuator is installed, form the bistable structure of piezoelectric energy recovery.In bistable state piezoelectric energy
In retracting device, circular arc piezoelectric cantilever upper and lower surface is pasted with piezoelectric element, piezoelectric bimorph structure is formed, specifically by piezoelectricity
Element, metal level, the sandwich structure of piezoelectric element composition, wherein for metal level positioned at centre, metal level is light metal aluminium or aluminium
Alloy；Piezoelectric element is made up of the electrode of two sides coating, it is connected with piezoelectric energy recovery circuit, group in metal level both sides
Into bistable state piezoelectric energy recovery device.
As shown in figure 1, in bistable state piezoelectric energy collecting device, external mechanical vibrations pass through in circular arc cantilever beam table
Face produces mechanical strain and then produces electric charge, then by driving piezoelectric actuator on cantilever beam, when switching piezoelectric energy is collected
Two kinds of Stable structures, high efficiente callback is carried out to extraneous ambient vibration energy；As shown in Fig. 2 in circular arc cantilever beam surface mount
Piezoelectric patches, circular arc cantilever beam is because vibration can produce strain, according to direct piezoelectric effect, the piezoelectric patches meeting that can be pasted on its surface
Produce electric charge；As shown in figure 3, piezoelectric actuator is installed in the upper and lower and left and right face of cantilever beam, it is outstanding for driving cantilever beam to change
The state of arm beam, when piezoelectric energy is collected, it can be toggled between two kinds of stable states.
A kind of bistable state piezoelectric energy recovery device, implementation steps are as follows：
1st step:The structure of the present apparatus is designed, the characteristics of being uniformly distributed first with circular arc cantilever beam with strain, if
Circular arc cantilever beam structure is counted out, its one end is fixed, the other end is fixed on a cantilever beam, and cantilever beam passes through spring supporting, bullet
Spring is fixed on pedestal, then, pastes multiple piezoelectric elements on the circular arc cantilever beam of design, due to direct piezoelectric effect,
When being acted on by power, electric charge can be produced on its surface；
2nd step：On the basis of the first step, it will be collected in electric charge caused by piezoelectric element surface by piezoelectric energy
Circuit is collected, and the circuit of collection is carried out into rectification by rectification circuit first when designing circuit, reconnects DC-DC electricity
Road, obtained electric energy is stored or applied；
3rd step：Judge the size of collection voltage, collected when vibration energy harvesting voltage is less than near this Stable structure
Voltage when, it can feed back to signal piezoelectric actuator, and driving piezoelectric actuator work, piezoelectric actuator can adjust piezoelectricity
The collection status of cantilever beam, circular arc piezoelectric cantilever is operated in another Stable structure.Then the work of the 2nd step is repeated；
4th step：The collection of energy of apparatus of the present invention will be repeated in above-mentioned steps：1st step, the 2nd step and the 3rd step, to shaking
Energy is collected.
In summary, proposed by the invention is a kind of bistable state piezoelectric energy recovery device.It has in the present apparatus
Device is simple, light weight, efficiency of energy collection are high, its structure can be carried out into saltus step back and forth between two stable states, to vibrational energy
The advantages that amount is reclaimed.
In those skilled in the art of the present technique it is understood that unless otherwise defined, all terms being used herein (wrap
Include technical term and scientific terminology) have and anticipated with the general understanding identical of the those of ordinary skill in art of the present invention
Justice.It should also be understood that some terms such as defined in general dictionary are it is understood that as having and prior art
Context in meaning have a consistent meaning, and except some specified otherwises, excessively idealization or excessively just will not be used
The implication of formula is explained.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, but will be understood by, the foregoing is only the embodiment of the present invention, be not limited to this hair
It is bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., it should be included in the present invention
Protection domain within.
Claims (8)
1. a kind of bistable state piezoelectric energy recovery device, the apparatus structure include：It is at least one circular arc cantilever beam, at least one
Piezoelectric actuator, at least one piezoelectric element, at least one pedestal, at least one spring, cantilever beam, fixing end, piezoelectric energy
Collecting circuit；It is characterized in that：By designed circular arc piezoelectric cantilever one end connection on a cantilever beam, the other end is fixed,
Cantilever beam and pedestal are linked together by spring, and piezoelectric actuator, structure are installed on the upper and lower and left and right face of cantilever beam
Into the bistable structure of piezoelectric energy recovery；In bistable state piezoelectric energy recovery device, following table on circular arc piezoelectric cantilever
Face is pasted with piezoelectric element, forms piezoelectric bimorph structure, the sandwich being specifically made up of piezoelectric element, metal level, piezoelectric element
Positioned at centre, metal level is light metal aluminum or aluminum alloy for structure, wherein metal level；Piezoelectric element is in metal level both sides, by two sides
The electrode composition of coating, it is connected with piezoelectric energy recovery circuit, forms bistable state piezoelectric energy recovery device.
2. bistable state piezoelectric energy recovery device according to claim 1, it is characterized in that, described cantilever beam is by metal level
Some piezoelectric elements of upper and lower surface mount are formed, and the quantity that piezoelectric element upper and lower surface is pasted is equal.
3. bistable state piezoelectric energy recovery device according to claim 1, it is characterized in that, described piezoelectric element is by piezoelectricity
The electrode of the two sides coating of material is formed.
4. bistable state piezoelectric energy recovery device according to claim 1, it is characterized in that, described piezoelectric is piezoelectricity
Monocrystalline or piezoelectric ceramics or polymer piezoelectric polymer or piezoelectric fabric polymer.
5. bistable state piezoelectric energy recovery device according to claim 1, it is characterized in that, described hardware be aluminium or
Aluminium alloy.
6. bistable state piezoelectric energy recovery device, its apparatus structure collection of energy step is as follows：
1st step:The structure of the present apparatus is designed, the characteristics of being uniformly distributed first with circular arc cantilever beam with strain, is designed
Circular arc cantilever beam structure, its one end is fixed, and the other end is fixed on a cantilever beam, and cantilever beam is solid by spring supporting, spring
Be scheduled on pedestal, then, paste multiple piezoelectric elements on the circular arc cantilever beam of design, due to direct piezoelectric effect, by
During the effect of power, electric charge can be produced on its surface；
2nd step：On the basis of the first step, piezoelectric energy collecting circuit will be passed through in electric charge caused by piezoelectric element surface
It is collected, the circuit of collection is subjected to rectification by rectification circuit first when designing circuit, reconnects DC-DC circuit, and
Obtained electric energy is stored or applied；
3rd step：The size of collection voltage is judged, when vibration energy harvesting voltage is less than the electricity collected near this Stable structure
During pressure, it can feed back to signal piezoelectric actuator, driving piezoelectric actuator work, and piezoelectric actuator can adjust piezoelectric cantilever
The collection status of beam, circular arc piezoelectric cantilever is operated in another Stable structure, then repeatedly the 2nd step works；
4th step：The collection of energy of apparatus of the present invention will be repeated in above-mentioned steps：1st step, the 2nd step and the 3rd step, to vibrational energy
Amount is collected.
7. bistable state piezoelectric energy recovery device according to claim 6, in the structure of device, it is characterised in that：
There is the characteristics of strain deformation is uniformly distributed using circular arc cantilever beam in 1st step, design suitable circular arc cantilever beam knot
Structure.
8. bistable state piezoelectric energy recovery device according to claim 6, in the structure of device, collection of energy is to utilize
Piezoelectric actuator drive cantilever beam, change arc cantilever beam state, realize to the collection of energy in environment two kinds of stable states it
Between mutually switch.
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| CN201711002238.8A CN107623463A (en) | 2017-10-24 | 2017-10-24 | Bistable state piezoelectric energy recovery device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390589A (en) * | 2018-05-02 | 2018-08-10 | 南京邮电大学 | A kind of interdigitation circular arc piezoelectric type energy collector |
| CN108390448A (en) * | 2018-01-31 | 2018-08-10 | 浙江大学宁波理工学院 | Piezoelectricity energy-collecting device |
| CN108809150A (en) * | 2018-06-30 | 2018-11-13 | 浙江工业大学 | One kind being based on piezoelectric ceramics energy recovery system and its energy reclaiming method |
| CN112886866A (en) * | 2021-03-30 | 2021-06-01 | 合肥工业大学 | Low-frequency pre-tightening type bistable vibration energy collector and manufacturing method thereof |
| CN114307768A (en) * | 2022-03-15 | 2022-04-12 | 杭州电子科技大学 | Thermoelectric coupling flexible oscillator and driving method thereof |
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| CN108390448A (en) * | 2018-01-31 | 2018-08-10 | 浙江大学宁波理工学院 | Piezoelectricity energy-collecting device |
| CN108390589A (en) * | 2018-05-02 | 2018-08-10 | 南京邮电大学 | A kind of interdigitation circular arc piezoelectric type energy collector |
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| CN112886866A (en) * | 2021-03-30 | 2021-06-01 | 合肥工业大学 | Low-frequency pre-tightening type bistable vibration energy collector and manufacturing method thereof |
| CN112886866B (en) * | 2021-03-30 | 2022-06-21 | 合肥工业大学 | Low-frequency pre-tightening type bistable vibration energy collector and manufacturing method thereof |
| CN114307768A (en) * | 2022-03-15 | 2022-04-12 | 杭州电子科技大学 | Thermoelectric coupling flexible oscillator and driving method thereof |
| CN114307768B (en) * | 2022-03-15 | 2022-05-27 | 杭州电子科技大学 | Thermoelectric coupling flexible oscillator and driving method thereof |
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Application publication date: 20180123 |