CN113507234B - Nonlinear multi-directional piezoelectric energy recovery device - Google Patents
Nonlinear multi-directional piezoelectric energy recovery device Download PDFInfo
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- CN113507234B CN113507234B CN202110808165.1A CN202110808165A CN113507234B CN 113507234 B CN113507234 B CN 113507234B CN 202110808165 A CN202110808165 A CN 202110808165A CN 113507234 B CN113507234 B CN 113507234B
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- 238000011084 recovery Methods 0.000 title claims abstract description 18
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- 230000010355 oscillation Effects 0.000 claims abstract description 10
- 238000005036 potential barrier Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 9
- 238000003306 harvesting Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
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- 239000010951 brass Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 3
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
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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
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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
- H02N2/181—Circuits; Control arrangements or methods
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Abstract
The invention discloses a nonlinear multidirectional piezoelectric energy recovery device which comprises a support and a special-shaped cantilever beam, wherein the right side of the top of the inner side of the support is fixedly connected with the special-shaped cantilever beam, a piezoelectric sheet is adhered to the top of the left side of the special-shaped cantilever beam, a first magnet is adhered to the top of the right side of the special-shaped cantilever beam, a spring is fixedly connected to the right side of the top of the support, and a second magnet is fixedly connected to the top of the spring. The invention introduces magnetic force to construct a nonlinear bistable system, is beneficial to overcoming potential barriers to realize inter-well oscillation, generates frequent bistable transition oscillation, and can generate resonance under vibration excitation in a wider frequency range, thereby greatly improving the broadband energy acquisition efficiency.
Description
Technical Field
The invention relates to a nonlinear multidirectional piezoelectric energy recovery device, and belongs to the technical field of piezoelectric vibration energy harvesting and new energy development.
Background
In recent years, the development of electronic devices has entered the age of miniaturization and low power consumption, and providing a long-term stable power supply for wireless sensors has been an important problem that hinders the development progress of wireless sensor networks. The use of chemical batteries tends to limit the widespread use of wireless sensor networks, since the batteries used in devices have several fatal drawbacks, such as: short life, low power density, generation of hazardous waste and high maintenance costs. The piezoelectric vibration energy collection mode has gained wide attention due to its advantages of small volume, high energy density, etc. The traditional linear piezoelectric vibration energy collecting device is difficult to be applied to a broadband vibration environment due to the narrow frequency band. The nonlinear piezoelectric cantilever beam vibration energy collecting system designed by applying the acting force of the nonlinear magnet can effectively expand the frequency band of the system and collect vibration energy in different environments. Generally, the traditional piezoelectric energy collector is based on a single piezoelectric cantilever beam, and has the defect that the vibration energy in one direction of a space can be collected only. The vibration in the actual environment can come from any direction of a three-dimensional space, so how to realize the vibration energy collection in all directions has important research value and significance for acquiring more vibration energy.
In recent years, scholars at home and abroad propose various energy harvesting structures to solve the above problems, such as: the piezoelectric vibration energy recovery device comprises an L-shaped mass block structure, a disc type structure, a dandelion-shaped structure, a magnetic sphere structure and the like, but the piezoelectric vibration energy recovery device cannot independently realize three-direction vibration energy collection of a nonlinear broadband under the condition of not multi-direction arrays.
Disclosure of Invention
The invention aims to provide a nonlinear multidirectional piezoelectric energy recovery device which has the advantages of small volume, simplicity and convenience in use and strong stability, realizes nonlinear broadband three-directional vibration energy collection under the condition of only using a special-shaped cantilever beam structure, and solves the problems that the existing vibration energy collection device is single in collection direction, complex in structure, large in volume, narrow in collection frequency band, harsh in requirements on external vibration environment, low in vibration energy collection efficiency and incapable of independently realizing nonlinear broadband three-directional vibration energy collection under the condition of not multi-directional arrays.
In order to achieve the purpose, the invention provides the following technical scheme: a nonlinear multi-direction piezoelectric energy recovery device comprises a support and a special-shaped cantilever beam, wherein the special-shaped cantilever beam is fixedly connected to the right side of the top of the inner side of the support, the special-shaped cantilever beam comprises a left bottom beam, a left side beam, a right side beam and a right bottom beam, a piezoelectric sheet is adhered to the top of the left bottom beam through conductive adhesive, a first magnet is adhered to the right side of the top of the right bottom beam, a spring is fixedly connected to the right side of the top of the support, a second magnet is fixedly connected to the top of the spring, the special-shaped cantilever beam is made of H60 brass, the left side of the special-shaped cantilever beam is a trapezoid, the right side of the special-shaped cantilever beam is a rectangle, the left side beam, the right side beam and the right bottom beam are all made by folding the rectangle part on the right side of the special-shaped cantilever beam, the left bottom beam is a trapezoid part on the left side of the special-shaped cantilever beam, the included angle between the left bottom beam and the left side beam is 120 degrees, and the included angle between the left side beam is 35 degrees, the horizontal height of right side floorbar will be higher than left floorbar, first magnet central point puts and second magnet central point puts on same water flat line, first magnet N level is installed right, second magnet N level is installed left for magnetism is relative, there is certain clearance between first magnet and second magnet, the support adopts acrylic material, the material of piezoelectric patches adopts PZT-5H piezoceramics piece, the wire has all been welded to the two polar surfaces of piezoelectric patches, first magnet and second magnet are Ru iron boron material, left side floorbar size is 12mm 24mm 48mm 0.2mm, the piezoceramics piece size is 10mm 22mm 45mm 0.2 mm.
Further, a specific energy harvesting method of the nonlinear multidirectional piezoelectric energy recovery device comprises the following steps:
A. firstly, a support is arranged on a platform which can collect vibration outside, when the vibration platform outside starts to vibrate up and down and left and right, the support vibrates under the driving of the vibration platform, the special-shaped cantilever beam starts to swing, the left bottom beam in the swing can deform to force the piezoelectric sheet to deform to generate electric energy, when the vibration platform vibrates, the distance between the first magnet and the second magnet changes ceaselessly due to the fact that the vibration and the swing modes of the left bottom beam, the left side beam, the right side beam and the right bottom beam are different from the irregular vibration mode of the spring, so that the potential function of the cantilever beam changes accordingly, when the special-shaped cantilever beam is positioned in a certain deeper potential well to perform single-well vibration, the vibration of the spring always increases the distance between the first magnet and the second magnet at a certain moment, and the distance between the first magnet and the second magnet increases to make the special-shaped potential well shallower, therefore, the opportunity is created for the special-shaped cantilever beam to cross the potential barrier to generate transition, the increase of the transition probability brings the improvement of the transition frequency, further the special-shaped cantilever beam is promoted to generate frequent bistable transition oscillation, resonance can be generated under the vibration excitation of a wide frequency range, the frequency band is widened, the energy conversion efficiency is increased, and the vibration energy collection of the wide frequency band ranges in the upper direction, the lower direction, the left direction and the right direction is realized.
B. When the external vibration source enables the energy recovery device to vibrate back and forth, external exciting force can act on the second magnet through the spring, so that the second magnet generates a motion track consistent with the top end of the spring, meanwhile, the second magnet acts on the first magnet in a magnetic excitation mode, so that the first magnet generates a vibration action, the motion track of the vibration is converted into the vertical swing of the special-shaped cantilever beam through a structure of mutual angulation between the right bottom beam, the right side beam, the left side beam and the left bottom beam, so that the piezoelectric piece is deformed to generate electric energy, in the vibration process, the distance between the first magnet and the second magnet is also changed along with the inconsistency between the swing of the special-shaped cantilever beam and the vibration of the spring, so that frequent bistable transition oscillation can be generated, and the broadband vibration energy collection in the third direction is realized.
The invention provides a nonlinear multidirectional piezoelectric energy recovery device, which is characterized in that a nonlinear bistable system is constructed by introducing magnetic force, frequent bistable transition oscillation of a special-shaped cantilever beam is promoted, resonance can be generated under vibration excitation in a wider frequency range, and vibration energy collection in three directions can be realized by matching with magnetic excitation, so that vibration energy collection in broadband, multidimensional, efficient and free-of-real-time adjustment of structure spacing is finally realized, and the problems that the conventional vibration energy recovery device is single in collection direction, complex in structure, large in size, narrow in collection frequency band, strict in requirement on external vibration environment, low in vibration energy collection efficiency, incapable of independently realizing nonlinear broadband three-direction vibration energy collection under the condition of not multi-direction array and the like are solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is a top view of the present invention.
In the figure: the piezoelectric ceramic resonator comprises a support 1, a piezoelectric sheet 2, a special-shaped cantilever beam 3, a left bottom beam 4, a left side beam 5, a right side beam 6, a right bottom beam 7, a first magnet 8, a second magnet 9 and a spring 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a nonlinear multidirectional piezoelectric energy recovery device comprises a support 1 and a special-shaped cantilever beam 3, wherein the special-shaped cantilever beam 3 is fixedly connected to the right side of the top of the inner side of the support 1, the special-shaped cantilever beam 3 comprises a left bottom beam 4, a left side beam 5, a right side beam 6 and a right bottom beam 7, a piezoelectric plate 2 is adhered to the top of the left bottom beam 4 through conductive adhesive, a first magnet 8 is adhered to the right side of the top of the right bottom beam 7, a spring 10 is fixedly connected to the right side of the top of the support 1, a second magnet 9 is fixedly connected to the top of the spring 10, the special-shaped cantilever beam 3 is made of H60 brass, the left side of the special-shaped cantilever beam 3 is a trapezoid, the right side of the special-shaped cantilever beam 3 is a rectangle, the left bottom beam 4 is a trapezoid part on the left side of the special-shaped cantilever beam 3, an included angle between the left bottom beam 4 and the left side beam 5 is 120 degrees, an included angle between the left side beam 5 and the right side beam 6 is 35 degrees, the horizontal height of the right bottom beam 7 is higher than that of the left bottom beam 4, the central position of the first magnet 8 and the central position of the second magnet 9 are on the same horizontal line, 8N stages of the first magnet are installed rightwards, 9N stages of the second magnet are installed leftwards, magnetism is opposite, a certain gap exists between the first magnet 8 and the second magnet 9, the support 1 is made of an acrylic material, the piezoelectric sheet 2 is made of a PZT-5H piezoelectric ceramic sheet, leads are welded on two pole faces of the piezoelectric sheet 2, the first magnet 8 and the second magnet 9 are made of Ru-Fe-B materials, the size of the left bottom beam 4 is 12mm 24mm 48mm 0.2mm, and the size of the piezoelectric sheet 2 is 10mm 22mm 45mm 0.2 mm.
A specific energy harvesting method of a nonlinear multidirectional piezoelectric energy recovery device comprises the following steps:
A. firstly, a support is arranged on a platform which can collect vibration outside, when the vibration platform outside starts to vibrate up and down and left and right, the support 1 is driven by the vibration platform to vibrate, meanwhile, the special-shaped cantilever beam 3 starts to swing, the left bottom beam 4 in the swinging process can deform to force the piezoelectric plate 2 to deform to generate electric energy, when the vibration platform vibrates, the potential function of the cantilever beam 3 is changed because the vibration and the swinging modes of the left bottom beam 4, the left side beam 5, the right side beam 6 and the right bottom beam 7 are inconsistent with the irregular vibration mode of the spring 10, the distance between the first magnet 8 and the second magnet 9 is changed ceaselessly, when the special-shaped cantilever beam 3 is positioned in a certain deeper potential well to perform single-well vibration, the vibration of the spring 10 always increases the distance between the first magnet 8 and the second magnet 9 at a certain moment, the distance between the first magnet 8 and the second magnet 9 increases to make the potential well of the cantilever beam 3 shallower, therefore, the opportunity is created for the special-shaped cantilever beam 3 to cross a potential barrier to generate transition, the increase of the transition probability brings the improvement of the transition frequency, further the special-shaped cantilever beam 3 is promoted to generate frequent bistable transition oscillation, resonance can be generated under the vibration excitation of a wide frequency range, the frequency band is widened, the energy conversion efficiency is increased, and the vibration energy collection of the wide frequency band ranges in the upper direction, the lower direction, the left direction and the right direction is realized.
B. When the external vibration source makes the energy recovery device vibrate back and forth, the external exciting force can act on the second magnet 9 through the spring 10, so that the second magnet 9 generates a motion track consistent with the top end of the spring 10, meanwhile, the second magnet 9 acts on the first magnet 8 in a magnetic excitation mode, so that the first magnet 8 generates vibration action, and then the vibration motion track is converted into the vertical swing of the special-shaped cantilever beam 3 through the mutual angled structure among the right bottom beam 7, the right side beam 6, the left side beam 5 and the left bottom beam 4, thereby realizing the electric energy generation by the piezoelectric sheet 2 deformation, at the same time of vibration, the distance between the first magnet 8 and the second magnet 9 is changed along with the inconsistency between the swing of the special-shaped cantilever beam 3 and the vibration of the spring 10, therefore, frequent bistable transition oscillation can be generated, and further vibration energy collection in a broadband range in the third direction is achieved.
The invention provides a nonlinear multidirectional piezoelectric energy recovery device, which is characterized in that a nonlinear bistable system is constructed by introducing magnetic force, frequent bistable transition oscillation of a beam is promoted, resonance can be generated under vibration excitation in a wider frequency range, and vibration energy collection in three directions can be realized by matching with magnetic excitation, so that vibration energy collection in broadband, multidimensional and efficient is finally realized, and the vibration energy collection with real-time adjustment of structure spacing is not needed.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. The utility model provides a multi-direction piezoelectricity energy recuperation device of nonlinearity, includes support (1) and special-shaped cantilever beam (3), its characterized in that: the special-shaped cantilever beam (3) is fixedly connected to the right side of the top of the inner side of the support (1), the special-shaped cantilever beam (3) comprises a left bottom beam (4), a left side beam (5), a right side beam (6) and a right bottom beam (7), the top of the left bottom beam (4) is adhered with a piezoelectric sheet (2) through conductive adhesive, the right side of the top of the right bottom beam (7) is adhered with a first magnet (8), the right side of the top of the support (1) is fixedly connected with a spring (10), the top of the spring (10) is fixedly connected with a second magnet (9), the special-shaped cantilever beam (3) is made of H60 brass material, the left side of the special-shaped cantilever beam (3) is a trapezoid, the right side of the left side beam (5), the right side beam (6) and the right side of the special-shaped cantilever beam (7) are all made by folding, the left side of the special-shaped cantilever beam (4) is a trapezoid part of the left side of the special-shaped cantilever beam (3), the included angle of left floorbar (4) and left sill beam (5) is 120 degrees, left sill beam (5) and right sill beam (6) included angle are 35 degrees, the level of right floorbar (7) will be higher than left floorbar (4), first magnet (8) central point puts and second magnet (9) central point puts on same water flat line, first magnet (8) N level is installed right, second magnet (9) N level is installed left, makes magnetism relative, there is certain clearance between first magnet (8) and second magnet (9), support (1) adopts the ya keli material, the material of piezoelectric patch (2) adopts PZT-5H piezoelectric ceramic piece, the two terminal surfaces of piezoelectric patch (2) all weld the lead, first magnet (8) and second magnet (9) are Ru iron boron material, left sill beam (4) size is 12mm 24mm 48mm 0.2mm, the piezoelectric sheet (2) has dimensions of 10mm 22mm 45mm 0.2 mm.
2. The nonlinear multidirectional piezoelectric energy recovery apparatus of claim 1, wherein: the specific energy harvesting method comprises the following steps:
A. firstly, a bracket is arranged on a platform which can collect vibration outside, when the vibration platform outside starts to vibrate up and down and left and right, the bracket (1) is driven by the vibration platform to vibrate, meanwhile, the special-shaped cantilever beam (3) starts to swing, the left bottom beam (4) in the swing can deform to force the piezoelectric plate (2) to deform to generate electric energy, when in vibration, the potential function of the cantilever beam (3) is changed continuously due to the fact that the vibration and the swing mode of the left bottom beam (4), the left side beam (5), the right side beam (6) and the right bottom beam (7) are inconsistent with the irregular vibration mode of the spring (10), and the vibration of the spring (10) always increases the distance between the first magnet (8) and the second magnet (9) at a certain moment, the distance between the first magnet (8) and the second magnet (9) is increased, so that the potential well of the special-shaped cantilever beam (3) becomes shallow, the opportunity is created for the special-shaped cantilever beam (3) to jump over a potential barrier, the jump frequency is improved due to the increase of the jump probability, the special-shaped cantilever beam (3) is promoted to generate frequent bistable state jump oscillation, resonance can be generated under the vibration excitation of a wide frequency range, the frequency band is widened, the energy conversion efficiency is increased, and the vibration energy collection of the wide frequency band range in the upper direction, the lower direction, the left direction and the right direction is realized;
B. when the external vibration source enables the energy recovery device to vibrate back and forth, external exciting force can act on the second magnet (9) through the spring (10), so that the second magnet (9) generates a motion track consistent with the top end of the spring (10), meanwhile, the second magnet (9) acts on the first magnet (8) in a magnetic excitation mode, so that the first magnet (8) generates vibration action, the vibration motion track is converted into vertical swing of the special-shaped cantilever beam (3) through a structure of mutual angulation among the right bottom beam (7), the right side beam (6), the left side beam (5) and the left bottom beam (4), and therefore the piezoelectric plate (2) is deformed to generate electric energy, and meanwhile, the distance between the first magnet (8) and the second magnet (9) is changed along with the inconsistency between the swing of the special-shaped cantilever beam (3) and the vibration of the spring (10), therefore, frequent bistable transition oscillation can be generated, and further vibration energy collection in a broadband range in the third direction is achieved.
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| CN202110808165.1A CN113507234B (en) | 2021-07-16 | 2021-07-16 | Nonlinear multi-directional piezoelectric energy recovery device |
| ZA2021/05773A ZA202105773B (en) | 2021-07-16 | 2021-08-13 | Nonlinear multi-directional piezoelectric energy harvesting device and energy harvesting method |
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| CN113507234B true CN113507234B (en) | 2022-05-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354434A (en) * | 2013-07-02 | 2013-10-16 | 天津大学 | Bistable piezoelectric cantilever beam vibration energy collector |
| CN108418467A (en) * | 2018-03-12 | 2018-08-17 | 佛山市顺德区中山大学研究院 | A kind of novel low-frequency piezoelectric type vibration energy collecting device |
| CN108880328A (en) * | 2018-08-24 | 2018-11-23 | 石河子大学 | A kind of Z-type piezoelectric vibrator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011083762A1 (en) * | 2010-01-07 | 2011-07-14 | パナソニック株式会社 | Piezoelectric power generation device and power generation method using piezoelectric power generation device |
| CN111669072B (en) * | 2020-06-25 | 2022-12-02 | 安徽理工大学 | Nonlinear broadband piezoelectric-magnetoelectric combined low-amplitude vibration energy harvester |
| CN112491298A (en) * | 2020-12-11 | 2021-03-12 | 安徽理工大学 | Diagonal beam type three-way broadband piezoelectric vibration energy harvesting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354434A (en) * | 2013-07-02 | 2013-10-16 | 天津大学 | Bistable piezoelectric cantilever beam vibration energy collector |
| CN108418467A (en) * | 2018-03-12 | 2018-08-17 | 佛山市顺德区中山大学研究院 | A kind of novel low-frequency piezoelectric type vibration energy collecting device |
| CN108880328A (en) * | 2018-08-24 | 2018-11-23 | 石河子大学 | A kind of Z-type piezoelectric vibrator |
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