CN112491298A - Diagonal beam type three-way broadband piezoelectric vibration energy harvesting device - Google Patents
Diagonal beam type three-way broadband piezoelectric vibration energy harvesting device Download PDFInfo
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Abstract
The invention discloses an oblique diagonal beam type three-dimensional broadband piezoelectric vibration energy harvesting device which comprises a base and an energy harvesting mechanism, wherein the energy harvesting mechanism is arranged at the top of the base, a mounting hole is formed in the middle of the top of the base, the energy harvesting mechanism comprises a transverse plate, a vertical plate, a piezoelectric beam, a mass block, a first magnetic block and a second magnetic block, the transverse plate is fixedly connected to the top of the base, the vertical plate is fixedly connected to the top of one section of the transverse plate, the other end of the top of the transverse plate is movably connected with a cushion block, and the first magnetic block is fixedly connected to the top. According to the invention, through the matching of the transverse plate, the cushion block, the bolt, the vertical plate, the mass block, the piezoelectric sheet, the first magnetic block, the piezoelectric beam and the second magnetic block, the bistable characteristic of the device is realized, the acquisition frequency band is widened, the larger and stable output power under the vibration of different frequencies is realized, the collection of three-dimensional vibration energy in the environment is realized, the energy collection can be realized for the vibration of X, Y, Z shafts in three directions, and the energy collection efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of piezoelectric energy harvesting, in particular to an oblique diagonal beam type three-way broadband piezoelectric vibration energy harvesting device.
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 piezoelectricity energy harvesting has appeared gradually in the teaching and production research of research student, this branch of academic or vocational study and some enterprises, there are some not enough in current energy harvesting device and energy harvesting structure, current vibration energy harvesting device structure is complicated, and when carrying out vibration energy harvesting, current energy harvesting device is the energy of the one-way vibration of needle most and carries out the energy harvesting, but in the actual conditions, can have many three-dimensional vibration environment, lead to current vibration energy harvester can not the high-efficient vibration energy of gathering in the environment, current vibration energy harvesting device still is the monostable state simultaneously, lead to the collection frequency band of device narrower, cause to follow the actual environment that natural frequency is complicated changeable energy harvesting efficiency lower, so need a vibration energy harvesting device to solve above-mentioned problem now.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an oblique diagonal beam type three-way broadband piezoelectric vibration energy harvesting device which has good vibration sensitivity, and the device has good two-degree-of-freedom bistable collection performance through the mutual coupling action of magnetic repulsion and mass block gravity, so that a wide energy collection frequency band is generated, the efficient collection of three-way vibration energy in the environment can be realized, meanwhile, the capability of the device for responding to low amplitude is increased due to the instability of an oblique diagonal structure, the utilization of micro-vibration energy is increased, meanwhile, the device has a simple structure and is convenient to produce, and the problems that the energy collection frequency band is narrow in the aspect of monostability and the energy collection of three-way vibration cannot be realized by the existing vibration energy harvesting device are solved.
In order to achieve the purpose, the invention provides the following technical scheme: an oblique diagonal beam type three-way broadband piezoelectric vibration energy harvesting device comprises a base and an energy harvesting mechanism, wherein the energy harvesting mechanism is arranged at the top of the base, and a mounting hole is formed in the middle of the top of the base;
the energy harvesting mechanism comprises a transverse plate, a vertical plate, a piezoelectric beam, a mass block, a first magnetic block and a second magnetic block, the transverse plate is fixedly connected to the top of the base, the vertical plate is fixedly connected to the top of one section of the transverse plate, the other end of the top of the transverse plate is movably connected with a cushion block, the first magnetic block is fixedly connected to the top of one side of the vertical plate, the piezoelectric beam comprises a bottom beam, a middle beam and a top beam, the second magnetic block is fixedly connected to one side of the top beam, the mass block is fixedly attached to the top and the bottom of the middle beam at the middle position, piezoelectric sheets are attached to the top and the bottom of one side of the middle beam through conductive adhesives, the top of the bottom beam is movably connected with a bolt through a threaded hole, and one end of.
Preferably, the base adopts the cruciform structure, the through-hole that is used for lightening the weight and aims at the installation is all seted up to one side of the top of base, the top of diaphragm and riser.
Preferably, the energy capturing mechanism is provided with four groups, the four groups of energy capturing mechanisms are fixed to the top of the base in 90-degree included angles, the vertical plates and the transverse plates are mutually perpendicular, and the four groups of vertical plates are mutually contacted in pairs.
Preferably, the piezoelectric beam is made by bending a copper sheet with the thickness of 85x20x0.3mm, and the size of the top beam is as follows: 15x20x0.3mm, the middle beam size is: 55x20x0.3mm, the sill beam size is: 15x20x0.3mm, all be 135 degrees contained angles between back timber and well roof beam, floorbar and the well roof beam.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the matching of the transverse plate, the base plate, the bolt, the vertical plate, the mass block, the piezoelectric sheet, the first magnetic block, the piezoelectric beam and the second magnetic block, the repulsion force of the magnet and the gravity of the mass block are mutually coupled, and the elasticity of the copper piezoelectric beam is matched to form a two-free oblique diagonal beam structure, so that the bistable characteristic of the device is realized, the sensitivity of the device to vibration is improved, the response capability of the device to low-amplitude vibration is enhanced, the acquisition frequency band of the device is effectively widened, the larger and stable output power under the vibration of different frequencies is realized, and meanwhile, the four groups of energy harvesting mechanisms are arranged in an array manner, the three-dimensional vibration energy collection in the environment is realized, the adaptability to the vibration environment is improved, namely, the energy collection can be realized on the vibration in three directions of X, Y, Z axes, and the energy collection efficiency is greatly improved.
2. The energy harvesting device is convenient to mount and place by arranging the base and the mounting hole, the bistable state of the piezoelectric beam is realized by arranging the first magnetic block, the second magnetic block and the mass block, coupling the repulsive force between magnets and the gravity of the mass block and matching the elasticity of the copper piezoelectric beam, the structure that the top beam and the middle beam form an included angle of 135 degrees is adopted by matching the top beam, the middle beam, the bottom beam and the bolt, the oblique diagonal structure of the device is realized by fixedly mounting the bottom beam, and the mass block fixedly adhered to the middle beam is matched, so that two degrees of freedom of the piezoelectric beam are realized, the opposite area between the two magnetic blocks is changed by arranging the cushion block, the repulsive force between the magnetic blocks is further changed, and the deformation effect of the piezoelectric beam in a vibration environment is increased.
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 schematic structural diagram of an energy harvesting structure according to the present invention;
FIG. 3 is a schematic structural view of a piezoelectric beam of the present invention;
fig. 4 is a schematic structural diagram of the base of the present invention.
In the figure: the energy harvesting device comprises a base 1, an energy harvesting mechanism 2, a transverse plate 3, a cushion block 4, bolts 5, vertical plates 6, a mass block 7, a piezoelectric plate 8, a second magnetic block 9, a piezoelectric beam 10, a first magnetic block 11, a top beam 12, a middle beam 13, a bottom beam 14 and mounting holes 15.
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. 1-4, an oblique diagonal beam type three-way broadband piezoelectric vibration energy harvesting device comprises a base 1 and an energy harvesting mechanism 2, wherein the energy harvesting mechanism 2 is arranged at the top of the base 1, a mounting hole 15 is formed in the middle of the top of the base 1, and the base 1 and the mounting hole 15 are arranged to facilitate mounting and placement of the energy harvesting device;
the energy harvesting mechanism 2 comprises a transverse plate 3, a vertical plate 6, a piezoelectric beam 10, a mass block 7, a first magnetic block 11 and a second magnetic block 9, the transverse plate 3 is fixedly connected to the top of the base 1, the vertical plate 6 is fixedly connected to the top of one section of the transverse plate 3, the other end of the top of the transverse plate 3 is movably connected with a cushion block 4, the opposite area between the two magnetic blocks is changed by arranging the cushion block 4, the size of repulsive force between the magnetic blocks is further changed, the deformation effect of the piezoelectric beam 10 in a vibration environment is increased, the first magnetic block 11 is fixedly connected to the top of one side of the vertical plate 6, the bistable state of the piezoelectric beam 10 is realized by utilizing the mutual coupling of the repulsive force between the magnets and the gravity of the mass block 7 and matching with the elasticity of the copper piezoelectric beam 10, the piezoelectric beam 10 comprises a bottom beam 14, a middle beam 13 and a top beam 12, the second magnetic block 9 is fixedly connected to one, the mass block 7 is fixedly adhered to the top and the bottom of the middle position of the middle beam 13, the piezoelectric pieces 8 are adhered to the top and the bottom of one side of the middle beam 13 through conductive adhesives, the top beam 12, the middle beam 13, the bottom beam 14 and the bolts 5 are matched, the top beam 12 and the middle beam 13 are adopted, the bottom beam 14 and the middle beam 13 are in a structure with a 135-degree included angle, the oblique diagonal structure of the device is realized in a bottom beam 14 fixed installation mode, the mass block 7 fixedly adhered to the middle beam 13 is matched at the same time, two degrees of freedom of the piezoelectric beam 10 are further realized, the bolt 5 is movably connected to the top of the bottom beam 14 through a threaded hole, one end of the bolt 5 sequentially penetrates through the bottom beam 14, the cushion block 4 and the transverse plate.
The base 1 adopts a cross structure, through holes for reducing mass and aligning installation are formed in the top of the base 1, the top of the transverse plate 3 and one side of the vertical plate 6, four groups of energy harvesting mechanisms 2 are arranged, 90-degree included angles are formed between every two groups of energy harvesting mechanisms and are fixed on the top of the base 1, the vertical plates 6 and the transverse plate 3 are perpendicular to each other, every two groups of the four groups of vertical plates 6 are in mutual contact, the piezoelectric beam 10 is formed by bending a copper sheet with the thickness of 85x20x0.3mm, 135-degree included angles are formed between the top beam 12 and the middle beam 13 and between the bottom beam 14 and the middle beam 13, two free diagonal beam structures are formed by the cooperation of the transverse plate 3, the cushion block 4, the bolt 5, the vertical plate 6, the mass block 7, the piezoelectric sheet 8, the first magnetic block 11, the piezoelectric beam 10 and the second magnetic block 9, the repulsive force of the magnet and the gravity of the mass block 7 are mutually coupled, therefore, the response capability of the device to low-amplitude vibration is enhanced, the acquisition frequency band of the device is effectively widened, the larger and stable output power under the vibration of different frequencies is realized, meanwhile, the four groups of energy harvesting mechanisms 2 are arranged in an array mode, the three-dimensional vibration energy in the environment is collected, the adaptability to the vibration environment is improved, the energy collection can be realized for the vibration of the X, Y, Z shaft in three directions, and the energy collection efficiency is greatly improved.
When the energy harvesting device is used, firstly, four groups of energy harvesting mechanisms 2 are respectively fixedly arranged at the top of a base 1 through holes on the base 1 and a transverse plate 3, the four groups of energy harvesting mechanisms 2 form an angle of 90 degrees between every two groups, then the energy harvesting device is fixed in a vibration environment through a mounting hole 15, when a vibration source in the environment vibrates, the vibration impacts the energy harvesting mechanisms 2, a piezoelectric beam 10 vibrates, a middle beam 13 deforms and drives a piezoelectric sheet 8 to deform, so that polarization current is generated, meanwhile, as a bottom beam 14 is fixed at the top of a cushion block 4, the piezoelectric beam 10 forms an oblique diagonal structure through the angle between a top beam 12 and the middle beam 13 and the bottom beam 14, a mass block 7 drives the middle beam 13 and the top beam 12 to move downwards along a vertical plate 6 under the action of gravity, and meanwhile, a second magnetic block 9 fixedly connected to one side of the top beam 12 is subjected to the magnetic repulsion action of a first magnetic, the top beam 12 and the middle beam 13 are driven to move to generate the vertical plates 6, and are matched with an elastic copper diagonal piezoelectric beam 10 structure, at the moment, under the composite action of various forces, the middle beam 13, the top beam 12 and the mass block 7 swing by taking the bottom beam 14 as a vertex to drive the middle beam 13 and the piezoelectric plate 8 to continuously deform, so that the continuous generation of polarization current is realized, the dynamic stable state of the two-freedom-degree piezoelectric beam 10 in the vibration process is realized, the vibration energy collection frequency band of the device is greatly widened, and the sensitivity of the device to vibration is improved, so that the response capability of the device to low-amplitude vibration is enhanced, the larger and stable output power under the vibration of different frequencies is realized, and the application range of the device is greatly widened.
Meanwhile, the four energy harvesting mechanisms 2 are arranged on the top of the base 1 in an array mode, so that the energy harvesting device can adapt to three-dimensional vibration from the environment, namely no matter a vibration source in the environment comes from the X-axis direction, the Y-axis direction or the Z-axis direction, the two-degree-of-freedom bistable diagonal piezoelectric beam 10 of the array can efficiently collect energy, and the problem that the existing vibration energy harvesting device is poor in effect in the aspect of three-dimensional vibration energy collection is solved.
In summary, the following steps: the utility model provides a diagonal beam formula three-dimensional broadband piezoelectricity vibration energy harvesting device passes through base 1, energy harvesting mechanism 2, diaphragm 3, cushion 4, bolt 5, riser 6, quality piece 7, piezoelectric patches 8, second magnetic path 9, piezoelectric beams 10, first magnetic path 11, back timber 12, well roof beam 13, floorbar 14 and mounting hole 15's cooperation, and it is narrower to have solved current vibration energy harvester structure energy acquisition frequency band, can not effectually collect and the less problem of range of application to three-dimensional vibration energy.
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 (4)
1. The utility model provides an oblique diagonal beam formula three-dimensional broadband piezoelectricity vibration energy harvesting device, includes base (1) and energy harvesting mechanism (2), its characterized in that: the energy harvesting mechanism (2) is arranged at the top of the base (1), and a mounting hole (15) is formed in the middle of the top of the base (1);
the energy harvesting mechanism (2) comprises a transverse plate (3), a vertical plate (6), a piezoelectric beam (10), a mass block (7), a first magnetic block (11) and a second magnetic block (9), the transverse plate (3) is fixedly connected to the top of the base (1), the vertical plate (6) is fixedly connected to the top of one section of the transverse plate (3), the other end of the top of the transverse plate (3) is movably connected with a cushion block (4), the first magnetic block (11) is fixedly connected to the top of one side of the vertical plate (6), the piezoelectric beam (10) comprises a bottom beam (14), a middle beam (13) and a top beam (12), the second magnetic block (9) is fixedly connected to one side of the top beam (12), the mass block (7) is fixedly adhered to the top and the bottom of the middle beam (13), and piezoelectric sheets (8) are adhered to the top and the bottom of one side of the middle beam (13) through conductive adhesives, the top of floorbar (14) has bolt (5) through screw hole swing joint, the one end of bolt (5) runs through floorbar (14), cushion (4) and diaphragm (3) in proper order and the surface cover is equipped with the nut.
2. The diagonal beam type three-way broadband piezoelectric vibration energy harvesting device according to claim 1, wherein: base (1) adopts the cruciform structure, the through-hole that is used for lightening the mass and aims at the installation is all offered to one side of the top of base (1), top and riser (6) of diaphragm (3).
3. The diagonal beam type three-way broadband piezoelectric vibration energy harvesting device according to claim 1, wherein: the energy harvesting mechanism (2) is provided with four groups, 90-degree included angles are formed between every two groups of energy harvesting mechanisms and are fixed at the top of the base (1), the vertical plates (6) and the transverse plates (3) are perpendicular to each other, and every two vertical plates (6) of the four groups of energy harvesting mechanisms are in contact with each other.
4. The diagonal beam type three-way broadband piezoelectric vibration energy harvesting device according to claim 1, wherein: the piezoelectric beam (10) is made by bending a copper sheet with the thickness of 85x20x0.3mm, and the size of the top beam (12) is as follows: 15x20x0.3mm, well roof beam (13) size is: 55x20x0.3mm, the size of the bottom beam (14) is as follows: 15x20x0.3mm, all be 135 degrees contained angles between roof beam (12) and well roof beam (13), floorbar (14) and well roof beam (13).
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| CN202011456181.0A CN112491298A (en) | 2020-12-11 | 2020-12-11 | Diagonal beam type three-way broadband piezoelectric vibration energy harvesting device |
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| CN202011456181.0A CN112491298A (en) | 2020-12-11 | 2020-12-11 | Diagonal beam type three-way broadband piezoelectric vibration energy harvesting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113507234A (en) * | 2021-07-16 | 2021-10-15 | 安徽理工大学 | Nonlinear multidirectional piezoelectric energy recovery device and energy recovery method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113507234A (en) * | 2021-07-16 | 2021-10-15 | 安徽理工大学 | Nonlinear multidirectional piezoelectric energy recovery device and energy recovery method |
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