CN107634676A - A kind of miniature energy gathers piezoelectricity tree - Google Patents
A kind of miniature energy gathers piezoelectricity tree Download PDFInfo
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- CN107634676A CN107634676A CN201711002296.0A CN201711002296A CN107634676A CN 107634676 A CN107634676 A CN 107634676A CN 201711002296 A CN201711002296 A CN 201711002296A CN 107634676 A CN107634676 A CN 107634676A
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Abstract
The invention discloses a kind of miniature energy to gather piezoelectricity tree, and it is made up of trunk, branch, leaf and fruit, and branch is fixed on trunk or other branches, has leaf or other branches on branch, has fruit on trunk and branch；Trunk root is connected with two Piezoelectric anisotropy beams in succession, this two Piezoelectric anisotropy beams are respectively in two orthogonal plane inner bendings, there is the Piezoelectric anisotropy bent in perpendicular a beam branch root with trunk junction, leaf is having a Piezoelectric anisotropy beam in vertical in-plane bending with branch junction, the part surface of leaf posts Piezoelectric anisotropy film, fruit is that it includes Piezoelectric anisotropy beam with the collision type vibrational energy collecting unit for rolling mass.Under the wind and/or effect of vibration of different directions, the vibrational energy of tree will be converted to electric energy by the piezoelectric on Piezoelectric anisotropy beam/film.Piezoelectricity tree environmental suitability proposed by the present invention is strong, be the fields such as radio sensing network there is an urgent need to a kind of microminiature power supply.
Description
Technical field
The invention belongs to field of renewable energy, is related specifically to a kind of middle low velocity wind for gathering multiple directions in environment
Can be with the miniature piezoelectric tree construction of weak vibration energy.
Background technology
Technology of wireless sensing network has wide application in fields such as environmental monitoring, building health monitoring, intelligence manufactures
Prospect.Current wireless sensing node uses battery powered mostly, because battery has big size, short life, pollution environment etc.
Shortcoming, for the wireless sense network comprising thousands of individual nodes, numerous sensing nodes is charged or changes electricity
Pond is not only time-consuming, laborious, is even difficult to sometimes.In recent years, using the kinetic energy that be widely present in environment (can be shaken
Kinetic energy, wind energy, flow kinetic energy etc.) be converted to electricity of the miniature energy acquisition system substituting battery of electric energy as wireless sensing node
Source, the focus studied both at home and abroad progressively is turned into.
Wind energy is the clean energy resource being widely present in nature, and wind energy is converted to the miniature energy acquisition system of electric energy and is
A kind of ideal source of wireless sensing node, by domestic and international extensive concern.With the wind-driven generator for having rotatable parts, (wind energy is adopted
Collecting system) to compare, the miniature wind collecting system based on wind-induced vibration mechanism has that simple in construction, cost is low, Miniaturized etc.
Many advantages, it is the emphasis of current miniature wind collecting system research.Miniature wind collecting system based on wind-induced vibration mechanism
The wind energy in environment is converted into electric energy first with wind-induced vibration phenomenon, further using electromagnetic induction, electrostatic effect or
Vibrational energy is converted to electric energy by the principles such as person's piezo-electric effect.For the miniature wind collecting system based on wind-induced vibration mechanism,
Only just there is higher electricity output when wind speed exceedes some specific critical wind velocity, current wind energy collector, which also exists, to be faced
The problems such as boundary's wind speed is high, it significantly limit its extensive use in wireless sensing field；In addition, the miniature wind energy developed at present
Acquisition system is simply very sensitive to the wind of certain specific direction, and the direction of natural environment apoplexy is often what is changed over time.
Therefore exploitation is respectively provided with the miniature wind collecting system of high collecting efficiency to the middle low velocity wind of different directions, to promoting wind collecting
System is of great significance in fields such as wireless sensings using tool.
Vibrational energy is widely present simultaneously in natural environment, ambient vibration can be converted to the micro-vibration energy collector of electric energy
And the focus studied in the world.The conventional vibrational energy collector frequency band based on resonance mechanism is narrower, intrinsic frequency is higher, right
Common faint, wide-band vibration energy collecting efficiency is low in natural environment.In addition, the vibration in natural environment generally have it is multiple
The component in direction, and direction is also often continually changing, when current vibrational energy collector mostly can only highly effective gathering
The vibrational energy of a certain specific direction, it is very low to the vibrational energy collecting efficiency in other directions, therefore its collection of totality to vibrational energy
It is less efficient.Carry out the highly efficient collecting method research of low frequency faint in environment, broadband, multi-direction vibrational energy, it is miniature to promoting
Application of the vibrational energy collector in fields such as radio sensing networks is also significant.
There are substantial amounts of plant, Ru Shu, grass etc. in nature, because they have different structure and material features, it
To wind and vibration response it is also different.By observing the response characteristic of different plants, analytical structure form is to its dynamic
The influence of response, there is important reference value to exploitation high-performance micro wind energy and vibrational energy acquisition system.
The present invention can just be produced in the presence of the middle low velocity wind and weak vibration of different directions by trees and significantly swung
Phenomenon inspiration, propose a kind of miniature energy collection piezoelectricity tree construction, its trunk, branch, leaf and fruit include piezoelectricity
Energy conversion unit, its middle low velocity wind and weak vibration to different directions are respectively provided with higher collecting efficiency, with conventional wind
Energy acquisition system is compared with vibrational energy acquisition system has the advantages of unique, and environmental suitability is stronger, in radio sensing network etc.
Field has broad prospect of application.
The content of the invention
The present invention proposes a kind of miniature energy collection piezoelectricity tree, and the piezoelectricity tree can be by the middle low speed of different directions in environment
Wind and/or weak vibration are converted to electric energy.
In order to realize foregoing invention purpose, the present invention takes following technical scheme：
A kind of miniature energy gathers piezoelectricity tree, and it is made up of trunk, branch, leaf and fruit, branch be fixed on trunk or
There are leaf or other branches on other branches, on branch, have fruit on trunk and branch；
Wherein trunk root is connected with two Piezoelectric anisotropy beams in succession, and this two Piezoelectric anisotropy beams mutually hang down at two respectively
Straight plane inner bending；
There is the Piezoelectric anisotropy beam that can be bent in perpendicular branch root with trunk junction；
Piezoelectric anisotropy film is posted in epiphyllous subregion, has Piezoelectric anisotropy beam in the junction of leaf and branch, the pressure
Electric composite beam can be bent in perpendicular；
Fruit is that it includes more Piezoelectric anisotropy beams with the collision type kinetic energy collecting unit for rolling mass.
In the presence of the wind of different directions and/or vibration, trunk, branch, the leaf of piezoelectricity tree will all vibrate.Tree
Branch will bend vibration, cause the Piezoelectric anisotropy beam for being located at its root to bend vibration；Branch also will appear from vibrating, and cause
Piezoelectric anisotropy beam positioned at branch root bends vibration；Fruit is located on trunk and branch, and the vibration of trunk and branch will
Cause the vibration of fruit, the fruit be with the collision type energy collecting system for rolling mass, comprising Piezoelectric anisotropy beam, branch and
The vibration of trunk collides the rolling mass caused in fruit with Piezoelectric anisotropy beam, causes Piezoelectric anisotropy beam vibration；Tree
The swing of leaf will cause Piezoelectric anisotropy film thereon, and leaf to become with the stress alternation in the Piezoelectric anisotropy beam of branch junction
Change.Therefore in the presence of wind and/or vibration, Piezoelectric anisotropy beam/film in trunk, branch, leaf and fruit will also shake
It is dynamic, due to piezo-electric effect, electrical potential difference will be produced between the piezoelectric layer upper and lower surface of Piezoelectric anisotropy beam/film, is using the electrical potential difference
Can be that wireless sensing node even load is powered.
The structure of above miniature energy collection piezoelectricity tree is that the wind-induced vibration response of tree is observed with being divided based on us
Itd is proposed on the basis of analysis.In nature, the dry of tree, branch, leaf, the configuration of fruit have many kinds, and Leaves'Shape is also different, this
The wind-induced vibration behavior to tree all has a significant impact a bit.It is observed that for the tree with walnut configuration, central low velocity wind from
When different directions blow over next, branch can produce larger swing.Further look at and find an interesting phenomenon：Although branch
Cylinder is close to, but as long as wind speed is not especially big, manage-style does not blow over from which direction, and the motion of branch is substantially
All it is upper and lower swing, the sideshake very little of branch.Main reason is that leaf and branch not exclusively in a plane, are set
Leaf also has a flexibility mostly, under different directions wind action, due to the difference of the inclination angle between leaf and branch, orientation etc.
Different, each leaf makes a concerted effort to substantially remain in vertical plane to branch, therefore branch is mainly swung up and down in vertical plane.This row
To make the design of tree-like wind collecting system more simple, i.e., branch vibrational energy is turned when in branch root setting Piezoelectric anisotropy beam
When being changed to electric energy, the flexural vibrations in vertical plane need to be only considered.Although branch mainly leans in vertical in plane vibration, trunk
It is probably then towards four corners of the world any direction, so if to set Piezoelectric anisotropy in the root of trunk during the bending of nearly root
Beam, then need to consider flexural vibrations of the trunk in different directions.In addition, wind energy of the flexibility of branch to collection different directions
Have an impact.This piezoelectricity tree is also suitable for gathering the vibrational energy of different directions in environment simultaneously.
Compared with prior art, the present invention has the advantages that：
1st, miniature energy proposed by the present invention gathers piezoelectricity tree by using tree-shaped three-dimensional structure, to the wind of different directions
And/or vibration is respectively provided with higher collecting efficiency, environmental suitability is strong, can be applied not only to wind direction and/or direction of vibration is constant
Application environment, while can also be applied to the application environment that wind direction and/or direction of vibration change over time；
2nd, miniature energy collection piezoelectricity tree proposed by the present invention, is only straining larger opening position (such as trunk root, branch
Root, leaf root and part surface, and fruit in Piezoelectric anisotropy beam on) be provided with piezoelectric, remaining big portion
There is no piezoelectric on separation structure, this method for arranging makes that piezoelectricity tree cost is lower, and making is easier；
3rd, miniature energy proposed by the present invention collection piezoelectricity tree, its branch root be provided only with can be in vertical plane it is curved
Bent Piezoelectric anisotropy beam, without setting the Piezoelectric anisotropy beam bent in the horizontal plane, the structure of piezoelectricity tree is simplified, is reduced
Processing cost；
4th, miniature energy collection piezoelectricity tree proposed by the present invention has hierarchy, and the wherein rigidity of trunk is maximum, branch
To take second place, the rigidity of leaf is minimum, and when wind speed changes, the ratio for the wind energy that trunk, branch, leaf and fruit gather is different,
Such as in wind speed and/or ambient vibration very little, the vibration of leaf is relatively large, the wind energy and/or vibrational energy accounting of leaf collection
Higher, this hierarchy expands the applicable wind speed range of piezoelectricity tree, and it is different it is can apply to oscillation intensity
Environment；
5th, miniature energy collection piezoelectricity tree proposed by the present invention rolls the collision type energy of mass by using existing band
The fruit that collecting unit is formed is measured, when trunk and branch swing, causes the rolling mass in collision type energy collecting system
Collided with Piezoelectric anisotropy beam, cause high vibration and the generating of Piezoelectric anisotropy beam, because collision type energy acquisition unit can be efficient
Low frequency, broadband and faint vibrational energy are gathered, therefore the vibrational energy of trunk and branch can be efficiently converted to electric energy by fruit；
6th, miniature energy collection piezoelectricity tree proposed by the present invention can not only gather the wind energy of different directions, can also gather
The vibrational energy of different directions in environment, has broad application prospects in fields such as radio sensing networks.
Brief description of the drawings
Fig. 1 is miniature energy collection piezoelectricity tree schematic diagram；
Fig. 2 is trunk root schematic diagram；
Fig. 3 is branch root schematic diagram；
Fig. 4 is leaf schematic diagram；
Fig. 5 is fruit schematic diagram.
Embodiment
The present invention will be described in detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, a kind of miniature energy collection piezoelectricity tree, it is made up of trunk 1, branch 2, leaf 3 and fruit 4, tree
Branch 2 is fixed on trunk 1 or other branches 2, has leaf 3 or other branches 2 on branch 2, has fruit 4 on trunk 1 and branch 2；
As shown in Fig. 2 the root of trunk 1 is connected with two Piezoelectric anisotropy beams 5 and 6 in succession, this two Piezoelectric anisotropy beams respectively can be two
Individual orthogonal plane inner bending；It can be bent as shown in figure 3, the root of branch 2 has with trunk junction in perpendicular
Piezoelectric anisotropy beam 7；As shown in figure 4, there is a Piezoelectric anisotropy beam 8 junction of leaf 3 and branch 2, the subregion patch on leaf 3
There is Piezoelectric anisotropy film 9；As shown in figure 5, fruit 4 is with the collision type kinetic energy collecting unit for rolling mass, it includes more pressures
Electric composite beam 10.
In the presence of the wind of different directions and/or vibration, trunk 1, branch 2, the leaf 3 of piezoelectricity tree will all shake
It is dynamic.Trunk 1 will bend vibration, cause the Piezoelectric anisotropy beam 5 and/or 6 positioned at its root to bend vibration；Branch 2
It will swing up and down, the Piezoelectric anisotropy beam 7 of the root of branch 2 bends vibration；The swing of leaf 3 will cause piezoelectricity thereon
Composite membrane 9, and the Piezoelectric anisotropy beam 8 of leaf 3 and the junction of branch 2 bend vibration；Fruit 4 is located at trunk 1 and branch 2
On, fruit 4 is with the collision type energy collecting system for rolling mass, and it includes Piezoelectric anisotropy beam 10, trunk 1 and branch 2
Vibration collides the rolling mass caused in fruit 4 with Piezoelectric anisotropy beam 10, causes Piezoelectric anisotropy beam 10 to vibrate.Cause
This, under wind action, the Piezoelectric anisotropy beam 5,6,7,8 and 10 in trunk 1, branch 2, leaf 3 and fruit 4, and piezoelectricity are answered
Close film 9 to vibrate, will produce due to piezo-electric effect, between the upper and lower surface of piezoelectric layer of Piezoelectric anisotropy beam/film and change with the time
The electrical potential difference of change, it can think that the electricity consumption such as wireless sensing node object is powered using the electrical potential difference.
Fruit 4 is the collision type kinetic energy collecting unit with rolling mass, such as can be directly by collision type piezoelectric vibration
Can acquisition system (patent of invention：A kind of system for collecting wide-band low-frequency micro piezoelectric vibration energy, the patent No.：
ZL201110175061.8), or collision type environment kinetic energy gathers the collision type kinetic energy collecting unit (patent of invention in array：
A kind of collision type environment kinetic energy collection array with rolling element, application number：201610943746.5) be arranged on and set as fruit 4
Dry 1 and branch 2 diverse location at.Both the above collision type kinetic energy collecting unit more Piezoelectric anisotropy beams 10, will vibration
Electric energy can be converted to.Fruit 4 can also use the broad band low frequency electromagnetic vibration energy collecting unit (patent of invention based on collision：
A kind of broad band low frequency electromagnetic vibration energy collector based on collision, application number:201611082425.7).
Piezoelectricity tree scalability proposed by the present invention is strong, and it can not only gather wind energy and vibrational energy, if in addition, in leaf
One layer of photoelectricity conversion thin film is grown on 3 grade surfaces, the piezoelectricity tree can also gather the solar energy in environment simultaneously.
It is last it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although ginseng
The present invention is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution (such as realizes conversion of the vibrational energy to electric energy using electromagnetic induction or electrostatic principle
Deng), without departing from the objective and scope of the technical program, it all should cover among scope of the presently claimed invention.
Claims (5)
1. a kind of miniature energy gathers piezoelectricity tree, it is made up of trunk, branch, leaf and fruit, and multiple branches are fixed on trunk
Or have leaf or other branches on other branches, on branch, there is fruit on trunk and branch；Trunk root is connected with two in succession
There is a Piezoelectric anisotropy beam Piezoelectric anisotropy beam, branch root with trunk junction, and leaf is having a piezoelectricity with branch junction
Composite beam, the subregion of leaf are pasted with Piezoelectric anisotropy film, and fruit is collision type vibrational energy collecting unit, and it is answered comprising piezoelectricity
Close beam.
2. miniature energy as claimed in claim 1 gathers piezoelectricity tree, it is characterised in that：Two are connected with succession in the root of limb
Root Piezoelectric anisotropy beam, this two Piezoelectric anisotropy beams are respectively in two orthogonal plane inner bendings.
3. miniature energy as claimed in claim 1 gathers piezoelectricity tree, it is characterised in that：The root of each branch is provided only with
A piece Piezoelectric anisotropy beam, the root per leaf are provided only with a Piezoelectric anisotropy beam, and these Piezoelectric anisotropy beams are only capable of perpendicular
Straight plane inner bending.
4. miniature energy as claimed in claim 1 gathers piezoelectricity tree, it is characterised in that：Fruit is fixed with trunk and branch
Real, fruit directly rolls the collision type kinetic energy collecting unit of mass using existing band.
5. miniature energy as claimed in claim 1 gathers piezoelectricity tree, it is characterised in that：By using tree-shaped three-dimensional structure,
It can not only gather the middle low velocity wind energy of different directions in environment, can also gather the weak vibration of different directions in environment
Energy.
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| CN201711002296.0A CN107634676A (en) | 2017-10-24 | 2017-10-24 | A kind of miniature energy gathers piezoelectricity tree |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108444496A (en) * | 2018-03-15 | 2018-08-24 | 中国科学院兰州化学物理研究所 | A kind of complete green triboelectrification and its sensing and detecting system |
| CN112910312A (en) * | 2021-03-18 | 2021-06-04 | 重庆大学 | Wind-induced vibration piezoelectric wind power generation device and piezoelectric wind power generation device group |
| US11543389B2 (en) * | 2018-03-16 | 2023-01-03 | Mitsumi Electric Co., Ltd. | Vibrational sensing system, vibrational sensing method, and non-transitory computer readable medium for sensing growth degree of fruit crop |
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| JP2005273644A (en) * | 2004-02-25 | 2005-10-06 | Taiheiyo Cement Corp | Wind power generator and wind power generating system |
| JP2006226153A (en) * | 2005-02-15 | 2006-08-31 | Taiheiyo Cement Corp | Wind power generation light emission device |
| CN202560479U (en) * | 2012-04-20 | 2012-11-28 | 襄樊学院 | Tree-based generator combined with piezoelectric generating sheets, springs and elastic sheets |
| CN103762895A (en) * | 2014-02-17 | 2014-04-30 | 重庆大学 | Piezoelectric type wind power generation system on building outer wall |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108444496A (en) * | 2018-03-15 | 2018-08-24 | 中国科学院兰州化学物理研究所 | A kind of complete green triboelectrification and its sensing and detecting system |
| CN108444496B (en) * | 2018-03-15 | 2021-12-07 | 中国科学院兰州化学物理研究所 | Full-green friction electrification sensing detection system |
| US11543389B2 (en) * | 2018-03-16 | 2023-01-03 | Mitsumi Electric Co., Ltd. | Vibrational sensing system, vibrational sensing method, and non-transitory computer readable medium for sensing growth degree of fruit crop |
| CN112910312A (en) * | 2021-03-18 | 2021-06-04 | 重庆大学 | Wind-induced vibration piezoelectric wind power generation device and piezoelectric wind power generation device group |
| CN112910312B (en) * | 2021-03-18 | 2023-03-10 | 重庆大学 | Wind-induced vibration piezoelectric wind power generation device and piezoelectric wind power generation device group |
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