LU102380B1 - Piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets - Google Patents
Piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets Download PDFInfo
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- LU102380B1 LU102380B1 LU102380A LU102380A LU102380B1 LU 102380 B1 LU102380 B1 LU 102380B1 LU 102380 A LU102380 A LU 102380A LU 102380 A LU102380 A LU 102380A LU 102380 B1 LU102380 B1 LU 102380B1
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- magnetic block
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- supported beam
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- 230000008878 coupling Effects 0.000 title claims abstract description 14
- 238000010168 coupling process Methods 0.000 title claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000003306 harvesting Methods 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001124569 Lycaenidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
- H02N2/186—Vibration harvesters
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The present invention discloses a piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets, including a bracket and a simply supported beam, where the simply supported beam is fixedly connected to a left side of an inner cavity of the bracket, a piezoelectric plate is adhered to a top of the simply supported beam, a first magnetic block is adhered to a top of the piezoelectric plate, a second magnetic block is adhered to a middle position of a top of the inner cavity of the bracket, a first coil is adhered to a right side of the top of the inner cavity of the bracket, a third magnetic block is adhered to a right side of the top of the simply supported beam, and a fourth magnetic block is adhered to a middle position of a bottom of the simply supported beam. In the present invention, the cooperation of the bracket, the piezoelectric plate, the first magnetic block, the second magnetic block, the third magnetic block, the first coil, the fourth magnetic block, the fifth magnetic block, the simply supported beam, the sixth magnetic block, and the second coil implements stress adjustment of the piezoelectric plate and the simply supported beam by using a nonlinear magnetic force, so that stress on the simply supported beam and the piezoelectric plate is more uniform, thereby increasing utilization of the piezoelectric plate, improving an energy harvest effect of the device, and prolonging a service life of the device.
Description
PIEZOMAGNETIC COUPLING VIBRATION ENERGY HARVESTER 192380 WITH DOUBLE-ACTION OF PRIMARY AND SECONDARY
BACKGROUND Technical Field The present invention relates to the field of piezoelectric energy harvesting, and in particular, to a piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets. Related Art In recent years, with the aggravation of global warming and the shortage of non-renewable resources such as oil, coal, and natural gas, seeking renewable and sustainable green energy has become an important challenge for the sustainable development of human civilization. A device that harvests energy from the environment by using a piezoelectric effect of a piezoelectric material is referred to as a piezoelectric energy harvester. Compared with electrostatic and electromagnetic energy harvesters that convert mechanical energy of vibrations into electrical energy, the piezoelectric energy harvester has prominent advantages such as high energy harvest efficiency, high energy density, reliable operation, strong adaptability, no pollution, and low costs, and has the best performance in extracting energy from environmental vibrations or noise, thereby becoming an effective method of obtaining electrical energy from environmental mechanical energy, and attracting wide attention. Researches on piezoelectric energy harvesting gradually appear in teaching of graduate students and undergraduates, and production researches of some enterprises. There are some disadvantages in existing experiment structures of test benches used in experiments for researches on vibration energy harvesting. During the experiments, a poor stress adjustment effect of a simply supported beam and a piezoelectric plate results in cases such as uneven stress distribution, poor experiment and application effects, and cracking of the piezoelectric plate due to uneven stress.
SUMMARY In view of the shortcomings of the prior art, the present invention provides a piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets, which is capable of adjusting stress of a piezoelectric plate by using a nonlinear magnetic force, so that the piezoelectric plate and a simply supported beam are uniformly stressed, to achieve good experiment and use effects, thereby resolving the problems of a poor stress adjustment effect, uneven stress of the simply supported beam and-V102380 the piezoelectric plate, and a poor use effect and a short service life of the device caused by defects in the device structure during use of the existing vibration energy harvester.
A piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets according to the present invention includes a bracket and a simply supported beam, where the simply supported beam is fixedly connected to a left side of an inner cavity of the bracket, a piezoelectric plate is adhered to a top of the simply supported beam, a first magnetic block is adhered to a top of the piezoelectric plate, a second magnetic block is adhered to a middle position of a top of the inner cavity of the bracket, a first coil is adhered to a right side of the top of the inner cavity of the bracket, a third magnetic block is adhered to a right side of the top of the simply supported beam, a fourth magnetic block is adhered to a middle position of a bottom of the simply supported beam, a fifth magnetic block is adhered to a middle position of a bottom of the inner cavity of the bracket, a sixth magnetic block is adhered to a right side of the bottom of the simply supported beam, and a second coil is adhered to a right side of the bottom of the inner cavity of the bracket.
Preferably, the first magnetic block, the second magnetic block, the fourth magnetic block, and the fifth magnetic block are magnets of the same specification and model, and the third magnetic block and the fourth magnetic block are magnets of the same specification.
Preferably, the same poles of the first magnetic block and the second magnetic block are mounted facing each other, the same poles of the fourth magnetic block and the fifth magnetic block are mounted facing each other, and opposite poles of the first magnetic block and the fourth magnetic block are mounted facing each other.
Preferably, N poles of the third magnetic block and the sixth magnetic block are mounted upward, a gap exists between the third magnetic block and the first coil, and a gap exists between the sixth magnetic block and the second coil.
Preferably, both the first coil and the second coil are enameled coils having the same quantity of turns, and the quantity of turns of the first coil and the second coil is adjustable.
Preferably, the bracket is made of an acrylic material, the simply supported beam is an H60 copper beam, and the piezoelectric plate is a PZT-SH piezoelectric ceramic plate.
Compared with the prior art, the present invention has the following beneficial effects:
1. In the present invention, the cooperation of the bracket, the piezoelectric plate, the first magnetic block, the second magnetic block, the third magnetic block, the first coil, the fourth magnetic block, the fifth magnetic block, the simply supported beam, the sixth magnetic block, and the second coil implements adjustment of stress on the piezoelectric plate and the simply supported beam by using a nonlinear magnetic force, so that stress on the simply supported." 02380 beam and the piezoelectric plate is more uniform, thereby increasing utilization of the piezoelectric plate, improving an energy harvesting effect of the device, and prolonging a service life of the device.
2. In the present invention, two sets of upper and lower primary magnet adjustment structures located on a side of the simply supported beam are formed by disposing the first coil, the second coil, the third magnetic block, and the sixth magnetic block, thereby well introducing the nonlinear magnetic force adjustment into the stress distribution adjustment of the piezoelectric plate and the simply supported beam, making the stress distribution more uniform, and optimizing a structure of a piezoelectric vibrator. Two sets of secondary magnet adjustment structures located on an upper side and a lower side of the simply supported beam and the piezoelectric plate are formed by disposing the first magnetic block, the second magnetic block, the fourth magnetic block, and the fifth magnetic block, thereby successfully applying the nonlinear magnetic force to a middle position of the simply supported beam and the piezoelectric plate, further increasing the stress distribution adjustment, and improving response sensitivity of low-frequency and low-amplitude excitation, and output performance of the piezoelectric vibrator.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings described herein are used to provide a further understanding of this application, and form a part of this application. Exemplary embodiments of this application and descriptions thereof are used to explain this application, and do not constitute any inappropriate limitation to this application. In the drawings: FIG. 1 is a schematic structural diagram of the present invention. FIG. 2 is a front view of the present invention.
In the drawings: 1. bracket, 2. piezoelectric plate, 3. first magnetic block, 4. second magnetic block, 5. third magnetic block, 6. first coil, 7. fourth magnetic block, 8. fifth magnetic block, 9. simply supported beam, 10. sixth magnetic block, and 11. second coil.
DETAILED DESCRIPTION A plurality of embodiments of the present invention are disclosed with reference to drawings. For clear descriptions, many details in practice are described together in the following descriptions. However, it should be understood that such details in practice should not be used to limit the invention. That is, the details in practice are not necessary in some implementations of the present invention. In addition, to simplify the drawings, some well- known and usual structures and components are shown in the drawings in a simple schematic manner. LU102380 Further, descriptions including "first", "second", and the like in the present invention are only used for a description purpose, do not specifically mean an order or a sequence, and are not used for limiting the present invention, but are merely used for distinguishing between components or operations described by using the same technical term, and cannot be understood as indicating or implying relative importance thereof or implying a quantity of the indicated technical features. Therefore, a feature defined by "first" or "second" can explicitly or implicitly include at least one of the features. Furthermore, technical solutions of various embodiments may be combined with each other, but need to be based on the technical solutions that can be implemented by a person of ordinary skill in the art. When a combination of the technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of the technical solutions does not exist and does not fall within the protection scope of the present invention.
Referring to FIG. 1 and FIG. 2, a piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets is provided, including a bracket 1 and a simply supported beam 9, where the simply supported beam 9 is fixedly connected to a left side of an inner cavity of the bracket 1, a piezoelectric plate 2 is adhered to a top of the simply supported beam 9, a first magnetic block 3 is adhered to a top of the piezoelectric plate 2, a second magnetic block 4 is adhered to a middle position of a top of the inner cavity of the bracket 1, a first coil 6 is adhered to a right side of the top of the inner cavity of the bracket 1, a third magnetic block 5 is adhered to a right side of the top of the simply supported beam 9, a fourth magnetic block 7 is adhered to a middle position of a bottom of the simply supported beam 9, a fifth magnetic block 8 is adhered to a middle position of a bottom of the inner cavity of the bracket 1, a sixth magnetic block 10 is adhered to a right side of the bottom of the simply supported beam 9, and a second coil 11 is adhered to a right side of the bottom of the inner cavity of the bracket 1. Two sets of upper and lower primary magnet adjustment structures located on a side of the simply supported beam 9 are formed by disposing the first coil 6, the second coil 11, the third magnetic block 5, and the sixth magnetic block 10, thereby well introducing the nonlinear magnetic force adjustment into stress distribution adjustment of the piezoelectric plate 2 and the simply supported beam 9, making the stress distribution more uniform, and optimizing a structure of a piezoelectric vibrator. Two sets of secondary magnet adjustment structures located on an upper side and a lower side of the simply supported beam 9 and the piezoelectric plate 2 are formed by disposing the first magnetic block 3, the second magnetic block 4, the fourth magnetic block 7, and the fifth magnetic block 8, thereby successfully applying the nonlinear magnetic force to a middle position of the simply-Y102380 supported beam 9 and the piezoelectric plate 2, further increasing the stress distribution adjustment, and improving response sensitivity of low-frequency and low-amplitude excitation, and output performance of the piezoelectric vibrator.
5 The first magnetic block 3, the second magnetic block 4, the fourth magnetic block 7, and the fifth magnetic block 8 are magnets of the same specification and model. The third magnetic block 5 and the fourth magnetic block 7 are magnets of the same specification. The same poles of the first magnetic block 3 and the second magnetic block 4 are mounted facing each other, the same poles of the fourth magnetic block 7 and the fifth magnetic block 8 are mounted facing each other, and opposite poles of the first magnetic block 3 and the fourth magnetic block 7 are mounted facing each other. N poles of the third magnetic block 5 and the sixth magnetic block 10 are mounted upward, a gap exists between the third magnetic block 5 and the first coil 6, and a gap exists between the sixth magnetic block 10 and the second coil 11. Both the first coil 6 and the second coil 11 are enameled coils having the same quantity of turns, and the quantity of turns of the first coil 6 and the second coil 11 is adjustable. The bracket 1 is made of an acrylic material, the simply supported beam 9 is an H60 copper beam, and the piezoelectric plate 2 is a PZT-5H piezoelectric ceramic plate. The cooperation of the bracket 1, the piezoelectric plate 2, the first magnetic block 3, the second magnetic block 4, the third magnetic block 5, the first coil 6, the fourth magnetic block 7, the fifth magnetic block 8, the simply supported beam 9, the sixth magnetic block 10, and the second coil 11 implements stress adjustment of the piezoelectric plate 2 and the simply supported beam 9 by using a nonlinear magnetic force, so that stress on the simply supported beam 9 and the piezoelectric plate 2 is more uniform, thereby increasing utilization of the piezoelectric plate
2. An energy harvest effect of the device is improved, and a service life of the device is prolonged.
During use, the piezoelectric plate 2 is first adhered to the top of the simply supported beam 9. Then the first magnetic block 3, the second magnetic block 4, the fourth magnetic block 7, and the fifth magnetic block 8 are fixed after being adjusted to appropriate positions. Next, the first coil 6 and the second coil 11 are respectively fixed on the right side of the top and the right side of the bottom of the inner cavity of the bracket 1; the third magnetic block 5 and the sixth magnetic block 10 are respectively fixed on the right side of the top and the right side of the bottom of the simply supported beam 9; and the third magnetic block 5 and the sixth magnetic block 10 are respectively adjusted to be aligned with a central position of the first coil 6 and a central position of the second coil 11. Then the piezoelectric plate 2, the first coil 6, and the second coil 11 are electrically connected through a wire to an external U102380 micro-power device that needs to be powered, and then the entire energy harvester is fixed on an external platform that can collect vibration, to implement energy harvest.
When the energy harvester is working, the simply supported beam 9 swings up and down due to a force of an external vibration source, and a nonlinear magnetic force of the first magnetic block 3, the second magnetic block 4, the fourth magnetic block 7, and the fifth magnetic block 8 acts on the simply supported beam 9 and the piezoelectric plate 2, thereby implementing stress distribution adjustment of the simply supported beam 9 and the piezoelectric plate 2, and improving vibration utilization of the piezoelectric plate 2 and a response sensitivity of low amplitude and low frequency. Centers of a positive charge and a negative charge inside are separated due to deformation of the piezoelectric plate 2, thereby generating a polarization voltage. Under the impact of the external vibration, the third magnetic block 5 and the sixth magnetic block 10 at a tail end of the piezoelectric plate 2 respectively move relative to the first coil 6 and the second coil 11 to complete a movement of cutting a magnetic induction line and generate an induced current. The collected vibration energy can be converted into electric energy required for operation of the micro-power device by using the wire.
In summary, according to the piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets, the cooperation of the bracket 1, the piezoelectric plate 2, the first magnetic block 3, the second magnetic block 4, the third magnetic block 5, the first coil 6, the fourth magnetic block 7, the fifth magnetic block 8, the simply supported beam 9, the sixth magnetic block 10, and the second coil 11 resolves the problems of a poor stress adjustment effect, uneven stress of the simply supported beam and the piezoelectric plate, and a poor use effect and a short service life of the device caused by defects in the device structure during use of the existing vibration energy harvester.
The foregoing descriptions are merely implementations of the present invention and are not intended to limit the present invention. For a person skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the scope of the claims of the present invention.
Claims (6)
1. A piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets, comprising a bracket (1) and a simply supported beam (9), wherein the simply supported beam (9) is fixedly connected to a left side of an inner cavity of the bracket (1), a piezoelectric plate (2) is adhered to a top of the simply supported beam (9), a first magnetic block (3) is adhered to a top of the piezoelectric plate (2), a second magnetic block (4) is adhered to a middle position of a top of the inner cavity of the bracket (1), a first coil (6) is adhered to a right side of the top of the inner cavity of the bracket (1), a third magnetic block (5) is adhered to a right side of the top of the simply supported beam (9), a fourth magnetic block (7) is adhered to a middle position of a bottom of the simply supported beam (9), a fifth magnetic block (8) is adhered to a middle position of a bottom of the inner cavity of the bracket (1), a sixth magnetic block (10) is adhered to a right side of the bottom of the simply supported beam (9), and a second coil (11) is adhered to a right side of the bottom ofthe inner cavity of the bracket (1).
2. The piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets according to claim 1, wherein the first magnetic block (3), the second magnetic block (4), the fourth magnetic block (7), and the fifth magnetic block (8) are magnets of the same specification and model, and the third magnetic block (5) and the fourth magnetic block (7) are magnets of the same specification.
3. The piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets according to claim 1, wherein the same poles of the first magnetic block (3) and the second magnetic block (4) are mounted facing each other, the same poles of the fourth magnetic block (7) and the fifth magnetic block (8) are mounted facing each other, and opposite poles of the first magnetic block (3) and the fourth magnetic block (7) are mounted facing each other.
4. The piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets according to claim 1, wherein N poles of the third magnetic block (5) and the sixth magnetic block (10) are mounted upward, a gap exists between the third magnetic block (5) and the first coil (6), and a gap exists between the sixth magnetic block (10) and the second coil (11).
5. The piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets according to claim 1, wherein both the first coil (6) and the second coil (11) are enameled coils having the same quantity of turns, and the quantity of turns of the first coil (6) and the second coil (11) is adjustable. LU102380
6. The piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets according to claim 1, wherein the bracket (1) is made of an acrylic material, the simply supported beam (9) is an H60 copper beam, and the piezoelectric plate (2) is a PZT-5H piezoelectric ceramic plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010646941.8A CN111817603A (en) | 2020-07-07 | 2020-07-07 | Double-acting piezomagnetic coupling vibration energy harvester with main magnet and auxiliary magnet |
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| Publication Number | Publication Date |
|---|---|
| LU102380B1 true LU102380B1 (en) | 2021-07-06 |
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|---|---|---|---|
| LU102380A LU102380B1 (en) | 2020-07-07 | 2021-01-06 | Piezomagnetic coupling vibration energy harvester with double-action of primary and secondary magnets |
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| LU (1) | LU102380B1 (en) |
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| EP3892325B1 (en) * | 2020-04-09 | 2022-03-16 | Cairdac | Leadless capsule type autonomous cardiac implant, comprising an energy recovery device with piezoelectric blade |
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| JP6413914B2 (en) * | 2015-05-08 | 2018-10-31 | 株式会社Ｓｏｋｅｎ | Power generator |
| CN106899233B (en) * | 2017-04-14 | 2018-10-02 | 合肥工业大学 | A kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device |
| CN207069941U (en) * | 2017-08-17 | 2018-03-02 | 浙江师范大学 | A kind of piezoelectric beam energy accumulator of combined type spring leaf indirect excitation |
| CN108471258A (en) * | 2018-04-24 | 2018-08-31 | 天津大学 | A kind of magnet coupling double cantilever beam energy gathering apparatus |
| CN110912455B (en) * | 2019-11-15 | 2021-02-09 | 北京机械设备研究所 | Broadband vibration energy harvester |
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