CN112003497A - Piezoelectric energy harvesting device based on wind-induced vibration principle - Google Patents
Piezoelectric energy harvesting device based on wind-induced vibration principle Download PDFInfo
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- CN112003497A CN112003497A CN202010705836.7A CN202010705836A CN112003497A CN 112003497 A CN112003497 A CN 112003497A CN 202010705836 A CN202010705836 A CN 202010705836A CN 112003497 A CN112003497 A CN 112003497A
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- 238000003306 harvesting Methods 0.000 title claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000001808 coupling effect Effects 0.000 abstract description 3
- 238000005485 electric heating Methods 0.000 abstract 1
- 239000003989 dielectric material Substances 0.000 description 6
- 230000005684 electric field Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- 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
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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- 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
Abstract
The invention discloses a piezoelectric energy harvesting device based on a wind-induced vibration principle. The fixed end and the limiting plate of the cantilever sheet are arranged on the mounting base body; the piezoelectric sheet array is arranged on the cantilever sheet; the two tile-shaped mounting bases are fastened to the cylindrical object by means of fastening elements. Under the action of wind load, the coupling action of aerodynamic force, elastic force and inertia force can make the cantilever thin plate produce vibration. The piezoelectric sheet on the thin plate has opposite positive and negative charges on two opposite surfaces due to vibration deformation and positive piezoelectric effect. The electric charge is led into the rectifying circuit through a lead, rectified into direct current and stored in the storage battery. The invention can capture the mechanical energy of the structural vibration under the action of wind load, is a wind energy collecting device and can be used as a green energy acquisition mode. The novel electric heating cooker has the advantages of simple structure, convenience in operation, low cost and easiness in popularization, and is not easy to damage.
Description
Technical Field
The invention relates to a wind energy capture device, in particular to a piezoelectric energy capture device based on a wind-induced vibration principle.
Background
In recent years, modern microelectronic technology, micro-electromechanical system, wireless sensor network technology have become the research hot spot at home and abroad. For embedded systems and a great number of wireless sensors, the conventional chemical energy battery has the defect of needing to be replaced periodically, and cannot play the maximum role of the wireless sensor. Therefore, environmental energy capture technology for providing sustainable energy for wireless sensor devices has been developed rapidly. Wherein vibrational energy trapping techniques are well established. The most basic vibration energy harvesting methods are electrostatic, electromagnetic and piezoelectric. The piezoelectric power generation device has the advantages of being high in energy density, free of electromagnetic interference, easy to process, convenient to achieve miniaturization and integration and the like, and has a very wide application prospect.
The piezoelectric effect was first discovered in curie brother in 1880: when some dielectrics are deformed by an external force in a certain direction, polarization occurs inside the dielectrics, and opposite charges of positive and negative polarities appear on two opposite surfaces of the dielectrics. When the external force is removed, it returns to an uncharged state, and this phenomenon is called positive piezoelectric effect. When the direction of the force changes, the polarity of the charge changes. Conversely, when an electric field is applied in the polarization direction of the dielectrics, these dielectrics also deform, and after the electric field is removed, the deformation of the dielectrics disappears, which is called the inverse piezoelectric effect. Nowadays, piezoelectric transducers based on the piezoelectric principle are widely used, which can convert mechanical vibrations into electrical signals or generate mechanical vibrations driven by an electric field.
When the structure bears the action of wind load, the structure can vibrate under the coupling action of time-varying aerodynamic force, elastic force generated by deformation and time-varying inertial force. This phenomenon is called aeroelastic phenomenon.
Disclosure of Invention
The invention designs a piezoelectric energy harvesting device based on a wind-induced vibration principle, which is used for capturing mechanical energy generated by a structure under the action of wind load, converting the mechanical energy into electric energy and storing the electric energy in a battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
a piezoelectric energy harvesting device based on a wind-induced vibration principle comprises a cantilever thin plate (1), a piezoelectric sheet (2), a limiting plate (3), an installation base body (4) and a fastening element (5).
Further, the fixed end of the cantilever thin plate (1) and the limiting plate (3) are arranged on the mounting base body (4); the piezoelectric sheets (2) are arranged on the cantilever sheet (1) in an array manner; the two tile-shaped mounting bases (4) are fastened to the cylindrical object by means of fastening elements (5).
Furthermore, under the action of wind load, the coupling action of time-varying aerodynamic force, elastic force generated by deformation and inertial force with time-varying magnitude direction can generate vibration on the cantilever thin plate (1). The piezoelectric sheet on the thin plate can generate polarization phenomenon in the piezoelectric sheet due to vibration deformation and positive piezoelectric effect, and charges with opposite positive and negative polarities appear on two opposite surfaces of the piezoelectric sheet. The electric charge is led into the rectifying circuit through a lead, rectified into direct current and stored in the storage battery. The rectification circuit and the storage battery are placed in the annular inner cavity of the mounting base body (4). In order to prevent the cantilever thin plates (1) from generating excessive deformation and instability in extreme weather and protect the piezoelectric sheets from being damaged by external force, two limiting plates (3) are respectively arranged on two sides of each cantilever thin plate (1). The mounting base body (4) is tile-shaped and can be mounted on a columnar object through a fastening element (5).
The invention can capture the mechanical energy of the structural vibration under the action of wind load, is a wind energy collecting device and can be used as a green energy acquisition mode. Has the advantages of simple structure, convenient operation, difficult damage, low cost and easy popularization.
Drawings
Fig. 1 is a top view of a piezoelectric energy harvesting device based on a wind-induced vibration principle;
fig. 2 is a front (sectional) view of a piezoelectric energy harvesting device based on the wind-induced vibration principle;
FIG. 3 is a view of the outer shape of the cantilever sheet;
FIG. 4 is a front view of the mounting substrate;
the meanings of the numbers and letters in the figures:
1: a cantilever sheet; 2: a piezoelectric sheet; 3: a limiting plate; 4: mounting the substrate 5: a fastening element.
a: annular inner cavity for mounting base body
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a piezoelectric energy harvesting device based on the wind-induced vibration principle according to the present invention includes: the piezoelectric element comprises a cantilever thin plate (1), a piezoelectric sheet (2), a limiting plate (3), a mounting base body (4) and a fastening element (5).
A plurality of (not limited to four, the number of the cantilever sheets (1) and the limiting plates (3) is determined according to specific situations) are arranged on the mounting base body (4) in an annular array; the piezoelectric sheets (2) are arranged in an array in the maximum strain area on the cantilever sheet (1); so as to generate more charges under the same amplitude and frequency of the thin plate; fastening the two tile-shaped mounting bases (4) to the columnar object by fastening elements (5); when the base body (4) is firmly mounted on the columnar object, the normal direction of the plane of the cantilever thin plate is parallel to the normal wind direction of the mounting position as much as possible. So that the amplitude and frequency of the wind load produced by the sheet is greater.
The device can be installed on the trunk of an endangered tree species and supplies power for a measurement and control sensor installed on the tree; the device can be arranged on a street lamp pole and used as an auxiliary power source of the street lamp; may be installed on large power transmission towers to power health monitoring sensors of the tower structure, etc.
The foregoing description is only exemplary for the purpose of illustrating the principles and features of the invention, and is not intended to limit the invention to the particular forms or embodiments disclosed herein, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (5)
1. A piezoelectric energy harvesting device based on a wind-induced vibration principle comprises a cantilever thin plate (1), a piezoelectric sheet (2), a limiting plate (3), an installation base body (4) and a fastening element (5). The cantilever type thin plate mounting structure is characterized in that a fixed end of a cantilever thin plate (1) and a limiting plate (3) are mounted on a mounting base body (4); the piezoelectric sheets (2) are arranged on the cantilever sheet (1) in an array manner; the two tile-shaped mounting bases (4) are fastened to the cylindrical object by means of fastening elements (5).
2. The piezoelectric energy harvesting device based on the wind-induced vibration principle is characterized in that the cantilever sheet (1) is a fly-swatter-shaped sheet. The narrow handle end is a fixed end and is arranged on the installation base body (4). The other end is a free end which is far larger than the width of the narrow handle end, so that the aerodynamic force generated by wind and the inertia force of the beam end can be increased. When wind acts on the cantilever thin plate (1), the cantilever thin plate (1) vibrates under the combined action of aerodynamic force, inertia force and elastic force generated by the deformation of the thin plate.
3. The piezoelectric energy harvesting device based on the wind-induced vibration principle is characterized in that the piezoelectric sheets (2) are arranged in an array in the maximum strain area on the cantilever sheet (1). The piezoelectric sheet converts mechanical energy into electrical energy with deformation synchronized with the thin plate.
4. The piezoelectric energy harvesting device based on the wind-induced vibration principle is characterized in that a limiting plate (3) is arranged on each side of each cantilever thin plate (1) and is used for preventing the cantilever thin plate (1) from generating excessive deformation and preventing external factors from damaging the piezoelectric sheet.
5. The piezoelectric energy harvesting device based on the wind-induced vibration principle is characterized in that the mounting base (4) is tile-shaped and can be mounted on a columnar object through a fastening element (5). The interior of the case has a cavity for receiving the rectifier circuit and the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705836.7A CN112003497A (en) | 2020-07-21 | 2020-07-21 | Piezoelectric energy harvesting device based on wind-induced vibration principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705836.7A CN112003497A (en) | 2020-07-21 | 2020-07-21 | Piezoelectric energy harvesting device based on wind-induced vibration principle |
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| CN112003497A true CN112003497A (en) | 2020-11-27 |
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| CN202010705836.7A Pending CN112003497A (en) | 2020-07-21 | 2020-07-21 | Piezoelectric energy harvesting device based on wind-induced vibration principle |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117677A (en) * | 2013-02-03 | 2013-05-22 | 苏州市职业大学 | Piezoelectric energy harvesting device |
| CN105958865A (en) * | 2016-06-21 | 2016-09-21 | 南京邮电大学 | Isosceles trapezoid cantilever beam-based piezoelectric-electromagnetic energy capture device |
| CN109194195A (en) * | 2018-11-27 | 2019-01-11 | 重庆大学 | A kind of piezoelectricity photoelectric coupling power generator |
| CN111064390A (en) * | 2020-01-15 | 2020-04-24 | 山东理工大学 | Piezoelectric generator with full-wind-direction excitation square column vibration |
-
2020
- 2020-07-21 CN CN202010705836.7A patent/CN112003497A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117677A (en) * | 2013-02-03 | 2013-05-22 | 苏州市职业大学 | Piezoelectric energy harvesting device |
| CN105958865A (en) * | 2016-06-21 | 2016-09-21 | 南京邮电大学 | Isosceles trapezoid cantilever beam-based piezoelectric-electromagnetic energy capture device |
| CN109194195A (en) * | 2018-11-27 | 2019-01-11 | 重庆大学 | A kind of piezoelectricity photoelectric coupling power generator |
| CN111064390A (en) * | 2020-01-15 | 2020-04-24 | 山东理工大学 | Piezoelectric generator with full-wind-direction excitation square column vibration |
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Application publication date: 20201127 |
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