CN111817603A - Double-acting piezomagnetic coupling vibration energy harvester with main magnet and auxiliary magnet - Google Patents
Double-acting piezomagnetic coupling vibration energy harvester with main magnet and auxiliary magnet Download PDFInfo
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- CN111817603A CN111817603A CN202010646941.8A CN202010646941A CN111817603A CN 111817603 A CN111817603 A CN 111817603A CN 202010646941 A CN202010646941 A CN 202010646941A CN 111817603 A CN111817603 A CN 111817603A
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
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- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000003306 harvesting Methods 0.000 abstract description 10
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 3
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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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Abstract
The invention discloses a double-acting piezomagnetic coupling vibration energy harvester with a main magnet and a secondary magnet, which comprises a bracket and a simple beam, wherein the left side of an inner cavity of the bracket is fixedly connected with the simple beam, a piezoelectric sheet is pasted on the top of the simple beam, a first magnetic block is pasted on the top of the piezoelectric sheet, a second magnetic block is pasted in the middle of the top of the inner cavity of the bracket, a first coil is pasted on the right side of the top of the inner cavity of the bracket, a third magnetic block is pasted on the right side of the top of the simple beam, and a fourth magnetic block is pasted in the middle of the bottom of the simple beam. According to the invention, through the matching of the bracket, the piezoelectric sheet, the first magnetic block, the second magnetic block, the third magnetic block, the first coil, the fourth magnetic block, the fifth magnetic block, the simple beam, the sixth magnetic block and the second coil, the stress on the piezoelectric sheet and the simple beam is adjusted by utilizing the nonlinear magnetic force, so that the stress on the simple beam and the piezoelectric sheet is more uniform, the utilization rate of the piezoelectric sheet is improved, the energy harvesting effect of the device is improved, and the service life of the device is prolonged.
Description
Technical Field
The invention relates to the technical field of piezoelectric energy harvesting, in particular to a double-acting piezomagnetic coupling vibration energy harvester with a main magnet and an auxiliary magnet.
Background
In recent years, with the increase of global warming and the shortage of non-renewable resources such as petroleum, coal, natural gas and the like, the search for renewable and sustainable green energy becomes an important challenge for the sustainable development of human civilization; compared with the electrostatic and electromagnetic type piezoelectric energy harvester which converts vibration mechanical energy into electric energy, the piezoelectric energy harvester has the outstanding advantages of high energy harvesting efficiency, large energy density, reliable work, strong adaptability, no pollution, low cost and the like, has the best performance of extracting energy from environmental vibration or noise, becomes an effective good method for acquiring electric energy from environmental mechanical energy, and is widely valued.
The research of piezoelectric energy harvesting gradually appears in the teaching and production research of researchers, undergraduates and enterprises, the experiment table experiment structure used in the experiment of the existing vibration energy harvesting research has some defects, the stress adjusting effect on the simply supported beam and the piezoelectric plate is not good during the experiment, so that the phenomena of uneven stress distribution, poor experiment and application effect, uneven stress and breakage of the piezoelectric plate and the like are caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a primary and secondary magnet double-acting piezomagnetic coupling vibration energy harvester which has the advantages of being capable of utilizing nonlinear magnetic force to adjust the stress of a piezoelectric sheet and enabling the stress of the piezoelectric sheet and a simply supported beam to be uniform, and is excellent in experiment and use effects, and the problems that the stress adjusting effect is poor, the stress of the simply supported beam and the piezoelectric sheet is not uniform, the using effect of a device is poor and the service life of the device is short due to the fact that the structure of the device is not enough when the existing vibration energy harvester is used are solved.
The invention discloses a double-acting piezomagnetic coupling vibration energy harvester with a main magnet and a secondary magnet, which comprises a bracket and a simple beam, wherein the left side of an inner cavity of the bracket is fixedly connected with the simple beam, a piezoelectric sheet is pasted on the top of the simple beam, a first magnetic block is pasted on the top of the piezoelectric sheet, a second magnetic block is pasted in the middle position of the top of the inner cavity of the bracket, a first coil is pasted on the right side of the top of the inner cavity of the bracket, a third magnetic block is pasted on the right side of the top of the simple beam, a fourth magnetic block is pasted in the middle position of the bottom of the simple beam, a fifth magnetic block is pasted in the middle position of the bottom of the inner cavity of the bracket, a sixth magnetic block is pasted on the right side of the bottom of the simple beam, and a.
Preferably, the first magnetic block, the second magnetic block, the fourth magnetic block and the fifth magnetic block are magnets with the same specification and model, and the third magnetic block and the fourth magnetic block are magnets with the same specification and model.
Preferably, the first magnetic block and the second magnetic block are installed in a same primary opposite manner, the fourth magnetic block and the fifth magnetic block are installed in a same primary opposite manner, and the first magnetic block and the fourth magnetic block are installed in an opposite primary opposite manner.
Preferably, the third magnetic block and the sixth magnetic block are installed with the N stages facing upward, and gaps are formed between the third magnetic block and the first coil and between the sixth magnetic block and the second coil.
Preferably, the first coil and the second coil both adopt enameled coils with the same number of turns, and the number of turns of the first coil and the second coil can be adjusted.
Preferably, the support is made of an acrylic material, the simply supported beam is a copper beam made of H60, and the piezoelectric patches are PZT-5H piezoelectric ceramic patches.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the matching of the bracket, the piezoelectric sheet, the first magnetic block, the second magnetic block, the third magnetic block, the first coil, the fourth magnetic block, the fifth magnetic block, the simple beam, the sixth magnetic block and the second coil, the stress on the piezoelectric sheet and the simple beam is adjusted by utilizing the nonlinear magnetic force, so that the stress on the simple beam and the piezoelectric sheet is more uniform, the utilization rate of the piezoelectric sheet is improved, the energy harvesting effect of the device is improved, and the service life of the device is prolonged.
2. The invention forms two groups of main magnet adjusting structures which are positioned at the upper part and the lower part of one side of the simply supported beam by arranging the first coil, the second coil, the third magnet and the sixth magnet, well introduces nonlinear magnetic force adjustment into the stress distribution adjustment of the piezoelectric sheet of the simply supported beam, evens the stress distribution situation to a certain extent, optimizes the structure of the piezoelectric vibrator, forms two groups of auxiliary magnet adjusting structures which are positioned at the upper part and the lower part of the simply supported beam and the piezoelectric sheet by arranging the first magnet, the second magnet, the fourth magnet and the fifth magnet, successfully applies nonlinear magnetic force to the middle positions of the simply supported beam and the piezoelectric sheet, further increases the stress distribution adjusting effect, and improves the response sensitivity to low-frequency and low-amplitude excitation and the output performance of the piezoelectric vibrator.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a front view of the present invention.
In the figure: the piezoelectric device comprises a support 1, a piezoelectric sheet 2, a first magnetic block 3, a second magnetic block 4, a third magnetic block 5, a first coil 6, a fourth magnetic block 7, a fifth magnetic block 8, a simple beam 9, a sixth magnetic block 10 and a second coil 11.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and 2, the double-acting piezomagnetic coupling vibration energy harvester with the main magnet and the auxiliary magnet comprises a bracket 1 and a simply supported beam 9, the simply supported beam 9 is fixedly connected to the left side of an inner cavity of the bracket 1, a piezoelectric sheet 2 is adhered to the top of the simply supported beam 9, a first magnetic block 3 is adhered to the top of the piezoelectric sheet 2, a second magnetic block 4 is adhered to the middle position of the top of the inner cavity of the bracket 1, a first coil 6 is adhered to the right side of the top of the inner cavity of the bracket 1, a third magnetic block 5 is adhered to the right side of the top of the simply supported beam 9, a fourth magnetic block 7 is adhered to the middle position of the bottom of the simply supported beam 9, a fifth magnetic block 8 is adhered to the middle position of the bottom of the inner cavity of the bracket 1, a sixth magnetic block 10 is adhered to the right side of the bottom of the simply supported beam 9, a second coil 11 is adhered to the right side of the bottom of the inner cavity of the bracket 1, and two main magnets, the nonlinear magnetic force adjustment is well introduced into the stress distribution adjustment of the piezoelectric plate 2 of the simply supported beam 9, the stress distribution condition is uniform to a certain extent, the structure of the piezoelectric vibrator is optimized, two groups of auxiliary magnet adjusting structures positioned on the upper side and the lower side of the simply supported beam 9 and the piezoelectric plate 2 are formed by arranging the first magnetic block 3, the second magnetic block 4, the fourth magnetic block 7 and the fifth magnetic block 8, the nonlinear magnetic force is successfully acted on the middle positions of the simply supported beam 9 and the piezoelectric plate 2, the stress distribution adjusting effect is further increased, and the response sensitivity to low-frequency and low-amplitude excitation and the output performance of the piezoelectric vibrator are improved;
the first magnetic block 3, the second magnetic block 4, the fourth magnetic block 7 and the fifth magnetic block 8 are magnets with the same specification and model, the third magnetic block 5 and the fourth magnetic block 7 are magnets with the same specification and model, the first magnetic block 3 and the second magnetic block 4 are installed in a same primary-stage opposite mode, the fourth magnetic block 7 and the fifth magnetic block 8 are installed in a same primary-stage opposite mode, the first magnetic block 3 and the fourth magnetic block 7 are installed in an opposite primary-stage opposite mode, the N stages of the third magnetic block 5 and the sixth magnetic block 10 are installed upwards, gaps exist among the third magnetic block 5, the first coil 6, the sixth magnetic block 10 and the second coil 11, the first coil 6 and the second coil 11 are all enameled coils with the same number of turns, the number of turns of the first coil 6 and the second coil 11 can be adjusted, the support 1 is made of acrylic materials, the simple support beam 9 is a copper beam of H60, the piezoelectric piece 2 is made of PZT-5H piezoelectric pieces, the support 1, The piezoelectric sheet 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 simple beam 9, the sixth magnetic block 10 and the second coil 11 are matched, so that the stress of the piezoelectric sheet 2 and the simple beam 9 is adjusted by utilizing nonlinear magnetic force, the stress of the simple beam 9 and the stress of the piezoelectric sheet 2 are more uniform, and the utilization rate of the piezoelectric sheet 2 is improved. The energy harvesting effect of the device is improved, and the service life of the device is prolonged.
When the piezoelectric energy harvesting device is used, firstly, the piezoelectric sheet 2 is 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 adjusted to be in proper positions and then fixed, then the first coil 6 and the second coil 11 are respectively fixed on the right sides of the top and the bottom of the inner cavity of the support 1, then the third magnetic block 5 and the sixth magnetic block 10 are fixed on the top and the bottom of the right side of the simply-supported beam 9, the third magnetic block 5 and the sixth magnetic block 10 are respectively adjusted to be aligned with the central positions of the first coil 6 and the second coil 11, then the piezoelectric sheet 2, the first coil 6 and the second coil 11 are electrically connected with micro-power devices needing power supply from the outside through leads, and then the energy harvesting device is integrally fixed on a platform capable of collecting vibration from the outside, and then energy harvesting work can be.
When the energy harvester works, an external vibration source can enable the simply-supported beam 9 to be stressed to swing up and down, the 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 sheet 2, so that the stress distribution of the simply-supported beam 9 and the piezoelectric sheet 2 is adjusted, the vibration utilization rate and the low-amplitude and low-frequency response sensitivity of the piezoelectric sheet 2 are improved, the deformation of the piezoelectric sheet 2 can cause the separation of the internal positive and negative charge centers, and polarization voltage is generated.
In summary, the following steps: this two effect pressure magnetic coupling vibration energy harvesters of major-minor magnet passes through support 1, piezoelectric patches 2, first magnetic path 3, second magnetic path 4, third magnetic path 5, first coil 6, fourth magnetic path 7, fifth magnetic path 8, simple beam 9, sixth magnetic path 10, the cooperation of second coil 11, it is not good because of the stress control effect that leads to of device structure to have solved current vibration energy harvester when using, simple beam and piezoelectric patches atress are uneven, device result of use is not good, the short-lived problem.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1. Main and auxiliary magnet double-acting piezomagnetic coupling vibration energy accumulator, including support (1) and simple beam (9), its characterized in that: support (1) inner chamber's left side fixedly connected with simple beam (9), the top of simple beam (9) is pasted and is had piezoelectric patches (2), the top of piezoelectric patches (2) is pasted and is had first magnetic path (3), the intermediate position at support (1) inner chamber top is pasted and is had second magnetic path (4), the right side at support (1) inner chamber top is pasted and is had first coil (6), the right side at simple beam (9) top is pasted and is had third magnetic path (5), the intermediate position of simple beam (9) bottom is pasted and is had fourth magnetic path (7), the intermediate position of support (1) inner chamber bottom is pasted and is had fifth magnetic path (8), the right side of simple beam (9) bottom is pasted and is had sixth magnetic path (10), the right side of support (1) inner chamber bottom is pasted and is had second coil (11).
2. The primary and secondary magnet double-acting piezomagnetic coupling vibration energy harvester of claim 1, wherein: the first magnetic block (3), the second magnetic block (4), the fourth magnetic block (7) and the fifth magnetic block (8) adopt magnets with the same specification and model, and the third magnetic block (5) and the fourth magnetic block (7) adopt magnets with the same specification and model.
3. The primary and secondary magnet double-acting piezomagnetic coupling vibration energy harvester of claim 1, wherein: the first magnetic block (3) and the second magnetic block (4) are installed in a same primary opposite mode, the fourth magnetic block (7) and the fifth magnetic block (8) are installed in a same primary opposite mode, and the first magnetic block (3) and the fourth magnetic block (7) are installed in an opposite primary opposite mode.
4. The primary and secondary magnet double-acting piezomagnetic coupling vibration energy harvester of claim 1, wherein: n stages of the third magnetic block (5) and the sixth magnetic block (10) are installed upwards, and gaps exist among the third magnetic block (5), the first coil (6), the sixth magnetic block (10) and the second coil (11).
5. The primary and secondary magnet double-acting piezomagnetic coupling vibration energy harvester of claim 1, wherein: first coil (6) and second coil (11) all adopt the enameled coil of the same turn, and the turn of first coil (6) and second coil (11) can be adjusted.
6. The primary and secondary magnet double-acting piezomagnetic coupling vibration energy harvester of claim 1, wherein: the support (1) adopts acrylic material, the copper roof beam of H60 is adopted in simple beam (9), piezoelectric patches (2) adopt PZT-5H piezoceramics piece.
Priority Applications (2)
| 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 |
| 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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| 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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| CN111817603A true CN111817603A (en) | 2020-10-23 |
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| CN202010646941.8A Pending 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11357994B2 (en) * | 2020-04-09 | 2022-06-14 | Cairdac | Autonomous cardiac implant of the leadless capsule type, including a piezoelectric beam energy harvester |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016181603A1 (en) * | 2015-05-08 | 2016-11-17 | 株式会社デンソー | Power generation device |
| CN106899233A (en) * | 2017-04-14 | 2017-06-27 | 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 |
| CN110912455A (en) * | 2019-11-15 | 2020-03-24 | 北京机械设备研究所 | Broadband vibration energy harvester |
-
2020
- 2020-07-07 CN CN202010646941.8A patent/CN111817603A/en active Pending
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2021
- 2021-01-06 LU LU102380A patent/LU102380B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016181603A1 (en) * | 2015-05-08 | 2016-11-17 | 株式会社デンソー | Power generation device |
| CN106899233A (en) * | 2017-04-14 | 2017-06-27 | 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 |
| CN110912455A (en) * | 2019-11-15 | 2020-03-24 | 北京机械设备研究所 | Broadband vibration energy harvester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11357994B2 (en) * | 2020-04-09 | 2022-06-14 | Cairdac | Autonomous cardiac implant of the leadless capsule type, including a piezoelectric beam energy harvester |
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| LU102380B1 (en) | 2021-07-06 |
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