Vibration energy collecting device

Abstract

The invention discloses a vibration energy collecting device which comprises a support and a first deformation beam, the middle of the first deformation beam is fixedly connected to the first end of the support, and a piezoelectric ceramic piece capable of deforming along with deformation of the first deformation beam is fixed to the first deformation beam. The two ends of the first deformation beam are connected with a first elastic plate and a second elastic plate respectively, the first elastic plate and the second elastic plate are located on the two sides of the first deformation beam respectively, and the first elastic plate and the second elastic plate are both perpendicular to the first deformation beam. The two elastic plates in the opposite directions are arranged at the two ends of the deformation beam, so that the deformation beam can be bent by vibration in the horizontal direction and can also be bent by vibration in the vertical direction. The piezoelectric ceramic piece can be bent along with bending of the variable beam, so that the two poles of the piezoelectric ceramic piece generate variable voltage output, and vibration mechanical energy is converted into electric energy.

Description

Technical Field

[0001] The invention relates to the technical field of vibration energy utilization, and in particular to a vibration energy collection device. Background Art

[0002] "Vibration energy" (or "vibration energy") generally refers to the energy generated or stored by the vibration of an object. It is the sum of the kinetic energy and potential energy of an object due to periodic vibration (such as spring vibration, mechanical structure shaking, etc.). In physics and engineering applications, it is a form of mechanical energy. "Vibration energy harvesting" is a technology that converts weak mechanical vibrations in the environment into electrical energy. It is particularly suitable for tiny devices that are difficult to power or inconvenient to wire, such as wireless sensors, medical implants, wearable devices, etc. At present, a more common method is to use a cantilever beam equipped with a piezoelectric ceramic sheet to collect vibration energy. For example, the application date is December 25, 2020, the application number is CN202011564456.2, and the invention name is a Chinese invention patent for a bistable vortex-induced vibration energy capture device based on internal resonance, which proposes such a device. Although this collection device has good collection efficiency, since its structure is only a beam, it is only conducive to collecting vibrations in one dimension, but not to the collection of multi-dimensional vibration energy. Summary of the invention

[0003] In order to solve the problem that the current vibration energy collection device is not conducive to multi-dimensional vibration energy collection, the present invention proposes a vibration energy collection device suitable for collecting multi-dimensional vibration energy.

[0004] The technical solution adopted by the present invention is to design a vibration energy collection device, including a bracket and a first deformable beam, the middle part of the first deformable beam is fixedly connected to the first end of the bracket, a piezoelectric ceramic piece that can deform as the first deformable beam deforms is fixed on the first deformable beam, the first elastic plate and the second elastic plate are respectively connected to the two ends of the first deformable beam, the first elastic plate and the second elastic plate are respectively located on both sides of the first deformable beam, the first elastic plate and the second elastic plate are both perpendicular to the first deformable beam, and the ends of the first elastic plate and the second elastic plate away from the first deformable beam are both provided with mass blocks.

[0005] In some embodiments, piezoelectric ceramic sheets are bonded and fixed on the plate surfaces of the first elastic plate and the second elastic plate.

[0006] In some embodiments, the piezoelectric ceramic sheet is located in the middle of the first deformable beam, and the first deformable beam and the piezoelectric ceramic sheet are symmetrical about the first end of the bracket.

[0007] In some embodiments, both ends of the first deformation beam are respectively connected to the first elastic plate and the second elastic plate through beam plates. The plate surface of the beam plate is perpendicular to the plate surface of the first deformation beam, and piezoelectric ceramic sheets are fixed on the plate surface of the beam plate.

[0008] In some embodiments, both the first elastic plate and the second elastic plate are bistable beams.

[0009] In some embodiments, the mass block is a first magnet block, and a second magnet block with a fixed position is arranged opposite to the mass block. The magnetic field directions of the first magnet block and the second magnet block are opposite.

[0010] In some embodiments, a second deformation beam is connected to the second end of the bracket opposite to the first deformation beam. The second deformation beam is perpendicular to the first deformation beam. Piezoelectric ceramic sheets are fixed on the second deformation beam. Both ends of the second deformation beam are respectively connected to a third elastic plate and a fourth elastic plate. The third elastic plate and the fourth elastic plate are respectively located on both sides of the second deformation beam. Both the third elastic plate and the fourth elastic plate are perpendicular to the second deformation beam. Mass blocks are arranged at the ends of the third elastic plate and the fourth elastic plate far from the second deformation beam.

[0011] In some embodiments, piezoelectric ceramic sheets are fixedly attached to the plate surfaces of both the third elastic plate and the fourth elastic plate.

[0012] In some embodiments, both the third elastic plate and the fourth elastic plate are bistable beams.

[0013] In some embodiments, both ends of the second deformation beam are respectively connected to the third elastic plate and the fourth elastic plate through beam plates. The plate surface of the beam plate is perpendicular to the plate surface of the second deformation beam, and piezoelectric ceramic sheets are fixed on the plate surface of the beam plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention utilizes two elastic plates with opposite directions arranged at both ends of the deformation beam, so that the deformation beam can be bent not only by horizontal vibrations but also by vertical vibrations. The piezoelectric ceramic sheets can be bent as the deformation beam bends, so that a changing voltage output is generated between the two poles of the piezoelectric ceramic sheets, thereby realizing the conversion of the mechanical energy of vibrations into electrical energy. Then, by arranging two mutually perpendicular deformation beams, the device can collect the energy in two vibration directions in the horizontal direction and is suitable for the collection of multi-dimensional vibration energy. Description of the Drawings

[0016] The present invention will be described in detail below in conjunction with specific embodiments and the accompanying drawings. For the purpose of showing details and facilitating the understanding of its principle, it is not necessarily drawn to scale, and similar reference numerals may describe similar components in different views. The drawings generally illustrate, by way of example and not limitation, the embodiments discussed herein. Among them:

[0017] Figure 1 is a schematic diagram of the acquisition device of the first embodiment.

[0018] Figure 2 is Figure 1 the left view schematic diagram of.

[0019] Figure 3 is a schematic diagram when the acquisition device moves to the right in the direction of the first deformation beam.

[0020] Figure 4 is a schematic diagram when the acquisition device moves to the left in the direction of the first deformation beam.

[0021] Figure 5 is a schematic diagram when the acquisition device moves to the left in the direction of the second deformation beam.

[0022] Figure 6 is a schematic diagram when the acquisition device moves to the right in the direction of the second deformation beam.

[0023] Figure 7 is a schematic diagram when the bracket moves upward.

[0024] Figure 8 is a schematic diagram when the bracket moves downward.

[0025] Figure 9 is the Figure 7 left view schematic diagram of.

[0026] Figure 10 is Figure 8 the left view schematic diagram of.

[0027] Figure 11 is a schematic diagram of the second embodiment.

[0028] Figure 12 is a schematic diagram of the third embodiment.

[0029] In the figure, 1, the first deformation beam; 2, the first rod body; 3, the second rod body; 4, the piezoelectric ceramic sheet; 5, the first elastic plate; 6, the second elastic plate; 10, the mass block; 7, the second deformation beam; 8, the third elastic plate; 9, the fourth elastic plate; 11, the beam plate; 12, the first magnet block; 13, the second magnet block; 14, the cylinder. Detailed implementation manners

[0030] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily essential to the solution of the invention.

[0031] The principle and structure of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] Embodiment 1

[0033] As Figure 1 、 2 shown, a vibration energy collection device includes a bracket and a first deformation beam 1. The middle of the first deformation beam 1 is fixedly connected to the first end of the bracket. The bracket can be used to be fixed on a vibration source. The bracket in this embodiment includes a first rod body 2 connected to the first deformation beam 1 and a second rod body 3 connected to the first rod body 2. The second rod body 3 is used to be connected to the vibration source. The first deformation beam 1 can simply be a long strip-shaped elastic strip. The material of the elastic strip can be, for example, a metal material or an organic polymer material with good elasticity, so that it is easy to undergo elastic deformation under the excitation of vibration. The connection part between the end of the first rod body 2 and the first deformation beam 1 is as small as possible to avoid affecting the deformation of the first deformation beam 1. For example, in this embodiment, a cylinder 14 is used to connect the first rod body 2 and the first deformation beam 1.

[0034] A piezoelectric ceramic sheet 4 that can deform with the deformation of the first deformation beam 1 is fixed on the first deformation beam 1, so that the piezoelectric ceramic sheet 4 can bend with the bending of the first deformation beam 1, so that a changing voltage output is generated at both poles of the piezoelectric ceramic sheet 4, thereby realizing the conversion of the mechanical energy of vibration into electrical energy.

[0035] A first elastic plate 5 and a second elastic plate 6 are respectively connected to both ends of the first deformation beam 1. The first elastic plate 5 and the second elastic plate 6 are respectively located on both sides of the first deformation beam 1. The first elastic plate 5 and the second elastic plate 6 are both perpendicular to the first deformation beam 1. Mass blocks 10 are provided at the ends of the first elastic plate 5 and the second elastic plate 6 away from the first deformation beam 1. The first elastic plate 5 and the second elastic plate 6 can adopt elastic strips with the same material and shape as the first deformation beam 1.

[0036] As Figure 3 、 4As shown, under the drive of the seismic force in the horizontal direction, the horizontal movement of the bracket causes the first elastic plate 5 and the second elastic plate 6 to bend, and then drives the first deformation beam 1 to bend up and down relative to the first rod 2, thereby driving the piezoelectric ceramic sheet 4 to deform and generate electricity.

[0037] As Figure 5 , 6 shown, under the drive of the seismic force in the vertical direction, the vertical movement of the bracket will also cause the first elastic plate 5 and the second elastic plate 6 to bend, and then will also drive the first deformation beam 1 to bend up and down relative to the first rod 2, thereby driving the piezoelectric ceramic sheet 4 to deform and generate electricity.

[0038] Piezoelectric ceramic sheets 4 are fixedly attached to the surfaces of the first elastic plate 5 and the second elastic plate 6, so as to generate electricity by using the deformation of the first elastic plate 5 and the second elastic plate 6, and improve the utilization efficiency of seismic energy.

[0039] The piezoelectric ceramic sheet 4 is located in the middle of the first deformation beam 1. The first deformation beam 1 and the piezoelectric ceramic sheet 4 are both symmetric about the first end of the bracket, so that the piezoelectric ceramic sheet 4 is located at the maximum deformation position.

[0040] A second deformation beam 7 is connected to the second end of the bracket opposite to the first deformation beam 1. The second deformation beam 7 is perpendicular to the first deformation beam 1. Piezoelectric ceramic sheets 4 are fixed on the second deformation beam 7. The two ends of the second deformation beam 7 are respectively connected to a third elastic plate 8 and a fourth elastic plate 9. The third elastic plate 8 and the fourth elastic plate 9 are respectively located on both sides of the second deformation beam 7. The third elastic plate 8 and the fourth elastic plate 9 are both perpendicular to the second deformation beam 7. Mass blocks 10 are arranged at the ends of the third elastic plate 8 and the fourth elastic plate 9 far from the second deformation beam 7. That is to say, the combined structure composed of the second deformation beam 7, the third elastic plate 8 and the fourth elastic plate 9 is the same as the combined structure composed of the first deformation beam 1, the first elastic plate 5 and the second elastic plate 6, but the two combined structures are respectively connected to the upper and lower ends of the first rod 2. The deformation principle of the first deformation beam 1 when it is vibrated is the same. The second deformation beam 7 can also convert the vertical and horizontal vibrations into electrical energy of the piezoelectric ceramic sheet 4. Since the length directions of the first deformation beam 1 and the second deformation beam 7 are perpendicular, the first deformation beam 1 and the second deformation beam 7 can respectively utilize the vibrations in two mutually perpendicular horizontal directions. As Figure 7 , 8 shown, the first deformation beam 1 can better utilize the vibration along the length direction of the first deformation beam, and the second deformation beam 7 can better utilize the vibration along the length direction of the second deformation beam. AsFigure 9 , 10 As shown, the second deformable beam is also conducive to utilizing vertical vibrations, i.e., it undergoes bending deformation under vertical vibrations.

[0041] Having the same structure as the first elastic plate 5 and the second elastic plate 6, piezoelectric ceramic sheets 4 are fixedly attached to the surfaces of the third elastic plate 8 and the fourth elastic plate 9, respectively, so as to generate electricity by the deformation of the third elastic plate 8 and the fourth elastic plate 9.

[0042] Embodiment Two

[0043] As Figure 11 shown, both ends of the second deformable beam 7 are respectively connected to the third elastic plate 8 and the fourth elastic plate 9 through beam plates 11. The surface of the beam plate 11 is perpendicular to the surface of the second deformable beam 7, and piezoelectric ceramic sheets 4 are fixed on the surface of the beam plate 11. At the same time, both ends of the first deformable beam 1 can also be respectively connected to the first elastic plate 5 and the second elastic plate 6 through beam plates 11. The surface of the beam plate 11 is perpendicular to the surface of the first deformable beam 1, and piezoelectric ceramic sheets 4 are fixed on the surface of the beam plate 11. In this way, when vibrations cause the first deformable beam 1 and the second deformable beam 7 to have a rotational effect around the first rod 2 as the axis of rotation, the beam plate 11 is prone to undergo large deformation, thereby driving the deformation of the piezoelectric ceramic sheet 4 to generate electricity.

[0044] Embodiment Three

[0045] Both the third elastic plate 8 and the fourth elastic plate 9 are bistable beams. Both the first elastic plate 5 and the second elastic plate 6 are bistable beams. A bistable beam refers to a beam with two stable equilibrium states. Such a beam can jump between two stable positions and remain in either state without the action of a continuous external force.

[0046] As Figure 12 shown, in this embodiment, the mass block 10 is the first magnet block 12, and a second magnet block 13 with a fixed position is arranged opposite to the mass block 10. The magnetic field directions of the first magnet block 12 and the second magnet block 13 are opposite, so that the elastic plate has two stable bending states.

[0047] Of course, a bistable beam can also adopt, for example, the bifurcated cantilever beam disclosed in the Chinese invention patent with the application number CN202411913729.8, the application date of December 24, 2024, and the name of a cantilever vibration power generation device based on a bistable structure.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains may make various modifications or supplements to the described specific embodiments, or use similar means to replace them, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0049] Those of ordinary skill in the art should understand that all directional references (e.g., above, below, upward, up, downward, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively for the drawings to assist the reader's understanding, and do not represent (e.g., for position, orientation, use, etc.) a limitation on the scope of the present invention defined by the appended claims. They are merely for the convenience of describing the present application and simplifying the description. In the absence of contrary statements, these directional terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The terms "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0050] For the sake of convenience in description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship of one device or feature to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0051] In addition, some ambiguous terms (e.g., substantially, certain, generally, etc.) can refer to a slight imprecision or slight deviation of conditions, quantities, values, dimensions, etc., some of which are within the manufacturing tolerances or margins. It should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus cannot be construed as a limitation on the protection scope of the present application.

Claims

1. A vibration energy collection device, characterized in that, It includes a bracket and a first deformation beam. The middle of the first deformation beam is fixedly connected to the first end of the bracket. A piezoelectric ceramic sheet that can deform as the first deformation beam deforms is fixed on the first deformation beam. The two ends of the first deformation beam are respectively connected to a first elastic plate and a second elastic plate. The first elastic plate and the second elastic plate are respectively located on both sides of the first deformation beam. The first elastic plate and the second elastic plate are both perpendicular to the first deformation beam. Mass blocks are provided at the ends of the first elastic plate and the second elastic plate away from the first deformation beam.

2. The vibration energy collection device according to claim 1, characterized in that, Piezoelectric ceramic sheets are fixedly attached to the surfaces of the first elastic plate and the second elastic plate.

3. The vibration energy collection device according to claim 1, characterized in that, The piezoelectric ceramic sheet is located in the middle of the first deformation beam. The first deformation beam and the piezoelectric ceramic sheet are both symmetric about the first end of the bracket.

4. The shock energy acquisition device according to claim 1, characterized in that, The two ends of the first deformation beam are respectively connected to the first elastic plate and the second elastic plate through beam plates. The surface of the beam plate is perpendicular to the surface of the first deformation beam. Piezoelectric ceramic sheets are fixed on the surface of the beam plate.

5. The shock energy acquisition device according to claim 1, characterized in that, Both the first elastic plate and the second elastic plate are bistable beams.

6. The shock energy acquisition device according to claim 5, characterized in that, The mass block is a first magnet block. A second magnet block with a fixed position is arranged opposite to the mass block. The magnetic field directions of the first magnet block and the second magnet block are opposite.

7. The shock energy acquisition device according to claim 1, wherein A second deformation beam is connected to the second end of the bracket opposite to the first deformation beam. The second deformation beam is perpendicular to the first deformation beam. A piezoelectric ceramic sheet is fixed on the second deformation beam. The two ends of the second deformation beam are respectively connected to a third elastic plate and a fourth elastic plate. The third elastic plate and the fourth elastic plate are respectively located on both sides of the second deformation beam. The third elastic plate and the fourth elastic plate are both perpendicular to the second deformation beam. Mass blocks are provided at the ends of the third elastic plate and the fourth elastic plate away from the second deformation beam.

8. The vibration energy collection device according to claim 7, wherein, Piezoelectric ceramic sheets are fixedly attached to the surfaces of the third elastic plate and the fourth elastic plate.

9. The vibration energy collection device according to claim 7, characterized in that, Both the third elastic plate and the fourth elastic plate are bistable beams.

10. The shock energy acquisition device according to claim 7, characterized in that, The two ends of the second deformation beam are respectively connected to the third elastic plate and the fourth elastic plate through beam plates. The surface of the beam plate is perpendicular to the surface of the second deformation beam. Piezoelectric ceramic sheets are fixed on the surface of the beam plate.

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