A layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly

Abstract

The present invention discloses a layered wind energy and vibration energy harvesting device based on the assembly of a hexagonal cantilever array, which belongs to the technical field of natural energy harvesting, and includes a plurality of regular hexagonal prism bases and a plurality of cylindrical bases, wherein the plurality of regular hexagonal prism bases and cylindrical bases are arranged alternately up and down, the position of the regular hexagonal prism base is fixed, and the cylindrical base can rotate along its central axis; the sides of the regular hexagonal prism base and the cylindrical base are fixedly connected with a plurality of hexagonal cantilever bodies, and the plurality of hexagonal cantilever bodies are electrically connected. The present invention can harvest wind energy and vibration energy at the same time, and can obtain multiple energy sources at the same time, thereby increasing the energy harvesting density. The hexagonal cantilever body can realize vibration energy harvesting in multiple directions, improve the energy harvesting efficiency, and can make fuller use of the wind energy and vibration energy in the environment. The capture of wind energy and vibration energy in different directions ensures the continuity of the output of the energy harvester, and provides more reliable and continuous power supply for microelectronic devices and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of natural energy collection, and in particular relates to a layered wind energy and vibration energy collection device based on a hexagonal cantilever array assembly. Background Art

[0002] In today's era of rapid technological change, the rapid progress of integrated circuit manufacturing technology has acted as a catalyst, giving rise to the booming development of low-power microelectronic products in all walks of life. However, in some special fields, such as human health monitoring, military security applications and field tracking, power supply issues have become a stumbling block for the widespread application of microelectronic devices - they are bulky, have limited lifespans and may cause environmental pollution. In order to break through this bottleneck and make the sensor system more powerful and have a longer lifespan, scientists have turned their attention to environmental energy harvesting, an underexplored energy source. On the one hand, mechanical vibration energy, an energy source that is ubiquitous and has great potential, is gradually becoming a solution by cleverly converting it into electrical energy through electrostatic, electromagnetic or piezoelectric technology. On the other hand, wind energy harvesting, as a clean and renewable energy utilization method, has the characteristics of wide distribution, environmental friendliness, diverse technologies and intelligent development. Then the coordinated use of mechanical energy and wind energy will hopefully contribute to the optimization and upgrading of the energy structure and the realization of sustainable development goals. In particular, wind energy and vibration energy harvesters that utilize the piezoelectric effect, with their simple structure, low cost, and green environmental protection, as well as their advantages of high output voltage, strong anti-interference ability, and easy integration, are like miniature green power stations, injecting endless vitality into the continuous operation of microelectronic devices.

[0003] In recent years, as an important branch of the field of natural energy harvesting, the diverse design and development of environmental energy harvesters have attracted widespread attention in the academic community. Traditional piezoelectric energy harvesters are usually classified as linear single-degree-of-freedom systems based on their vibration characteristics. Such devices are widely favored because of their simple structure and convenient processing. However, in practical applications, especially when faced with the randomness, intermittency and low-frequency characteristics of environmental vibrations, the limitations of linear single-degree-of-freedom devices gradually emerge. Due to their inherent narrow working bandwidth, such devices often exhibit poor energy harvesting performance under off-resonance conditions. To overcome this challenge, researchers began to explore multi-modal design ideas, aiming to broaden the operating frequency range of energy harvesters and improve their adaptability in complex environments. Early studies attempted to use multiple piezoelectric cantilever beams to form an array in order to capture vibration energy over a wider frequency range. However, this approach has a significant drawback: at any given frequency, only a single cantilever beam can effectively contribute to the output power, while the remaining cantilever beams are inefficient or ineffective. As the research deepened, researchers began to try more complex and efficient multi-modal structures. L-shaped structures, dual cantilever beam structures, truncated structures, and multi-resonance flexible energy harvesting structures have been proposed one after another. These new structures have improved the performance of the operating frequency bandwidth to a certain extent, enabling the energy harvester to maintain a high energy harvesting efficiency in a wider frequency range. However, these structures still face some defects, such as the reduction of the resonant frequency, the further broadening of the mode, and the continuous optimization of the energy harvesting efficiency.

[0004] Therefore, a layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly.

[0006] To achieve the above-mentioned purpose, the present invention provides a layered wind energy and vibration energy harvesting device assembled based on a hexagonal cantilever array, comprising: a plurality of regular hexagonal prism bases and a plurality of cylindrical bases, wherein the regular hexagonal prism bases and the cylindrical bases are alternately arranged up and down, the regular hexagonal prism bases are fixed in position, and the cylindrical bases can rotate along their central axes; the sides of the regular hexagonal prism bases and the cylindrical bases are fixedly connected with a plurality of hexagonal cantilevers, and the plurality of hexagonal cantilever bodies are electrically connected to each other.

[0007] According to a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly provided by the present invention, the six sides of the hexagonal cantilever body fixed to the side of the regular hexagonal prism base respectively form angles of ±0°, ±60° and ±120° with the horizontal plane.

[0008] According to a layered wind energy and vibration energy harvesting device assembled based on a hexagonal cantilever array provided by the present invention, the six sides of the hexagonal cantilever body fixed to the side of the cylindrical base respectively form angles of ±30°, ±90° and ±150° with the horizontal plane.

[0009] According to the present invention, a layered wind energy and vibration energy harvesting device based on the assembly of a hexagonal cantilever array is provided, wherein the hexagonal cantilever includes six base layers, six piezoelectric layers and a mass block, the six base layers are spliced ​​together to form a hexagonal prism with a hollow interior, the six piezoelectric layers are respectively adhered to the outer sides of the six base layers, and the mass block is fixed to the free end of the hexagonal prism formed by splicing the six base layers together.

[0010] According to a layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly provided by the present invention, the length and width of the piezoelectric layer are adjustable.

[0011] According to a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly provided by the present invention, the sizes of the several hexagonal cantilever bodies on the side of the regular hexagonal prism base or the cylindrical base are different and are arranged in a gradually increasing or decreasing manner.

[0012] According to a layered wind energy and vibration energy harvesting device assembled based on a hexagonal cantilever array provided by the present invention, a connecting shaft is provided through the central axis position of the regular hexagonal prism base and the cylindrical base, the connecting shaft is fixedly connected to the regular hexagonal prism base, and the connecting shaft is rotatably connected to the cylindrical base; a connecting groove is provided at the bottom of the connecting shaft, and a plug rod is fixedly connected to the top surface of the regular hexagonal prism base or the cylindrical base at the top of the connecting shaft, and the plug rod matches the connecting groove.

[0013] Compared with the prior art, the present invention has the following advantages and technical effects:

[0014] The present invention adopts a layered connection method in which a regular hexagonal prism base and a cylindrical base are arranged alternately up and down, which can collect wind energy and vibration energy at the same time, and can obtain multiple energy sources at the same time, thereby increasing the energy collection density. When the present invention is placed in an actual environment including a wind energy and vibration energy system, under external vibration excitation, the regular hexagonal prism base vibrates and drives the hexagonal cantilever body on its entire side to vibrate together, and the hexagonal cantilever body transforms mechanical vibration energy into electrical energy by deforming during vibration; under wind energy excitation, the cylindrical base rotates and drives the hexagonal cantilever bodies on all sides to deform, and transforms mechanical vibration energy into electrical energy. This energy conversion method is based on the piezoelectric effect. The structural design of the device uniformly arrays multiple hexagonal cantilever bodies outside the regular hexagonal prism base and the cylindrical base makes the energy conversion process more efficient, and can convert more mechanical energy into electrical energy output. The vibration of the six sides of the hexagonal cantilever body in different directions can realize vibration energy collection in multiple dimensions. Compared with devices that can only collect energy in a single direction or a limited direction, the energy collection efficiency is greatly improved, and the wind energy and vibration energy in the environment can be more fully utilized. The capture of wind energy and vibration energy in different directions ensures the continuity of the energy harvester's output and provides more reliable and continuous power supply for microelectronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a schematic structural diagram of a layered wind energy and vibration energy harvesting device assembled based on a hexagonal cantilever array according to the present invention;

[0017] Figure 2 It is a schematic diagram of the connection structure between the regular hexagonal prism base and the hexagonal cantilever body in the present invention;

[0018] Figure 3 This is a schematic diagram of the connection structure between the cylindrical base and the hexagonal cantilever body in the present invention;

[0019] Figure 4 It is a schematic diagram of the installation direction structure of the hexagonal cantilever body on the regular hexagonal prism base in the present invention;

[0020] Figure 5 This is a schematic diagram of the installation direction structure of the hexagonal cantilever body on the cylindrical base in the present invention;

[0021] Figure 6 This is a voltage output comparison diagram of the layered wind energy and vibration energy harvesting device assembled based on the hexagonal cantilever array of the present invention.

[0022] In the figure: 1. regular hexagonal prism base; 2. cylindrical base; 3. hexagonal cantilever body; 31. base layer; 32. piezoelectric layer; 33. mass block; 4. connecting axis. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figures 1 to 6 As shown, this embodiment provides a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly, including: a plurality of regular hexagonal prism bases 1 and a plurality of cylindrical bases 2, the plurality of regular hexagonal prism bases 1 and the cylindrical bases 2 are alternately arranged up and down, the regular hexagonal prism bases 1 are fixed in position, and the cylindrical bases 2 can rotate along their central axes; a plurality of hexagonal cantilever bodies 3 are fixedly connected to the side surfaces of the regular hexagonal prism bases 1 and the cylindrical bases 2, and the plurality of hexagonal cantilever bodies 3 are electrically connected to each other.

[0026] The present invention adopts a layered connection method in which a regular hexagonal prism base 1 and a cylindrical base 2 are arranged alternately up and down, which can collect wind energy and vibration energy at the same time, and can obtain multiple energy sources at the same time, thereby increasing the energy collection density. When the present invention is placed in an actual environment including a wind energy and vibration energy system, under external vibration excitation, the regular hexagonal prism base 1 vibrates and drives the hexagonal cantilever body 3 on its entire side to vibrate together, and the hexagonal cantilever body 3 converts mechanical vibration energy into electrical energy by deforming during vibration; under wind energy excitation, the cylindrical base 2 rotates and drives the hexagonal cantilever bodies 3 on all sides to deform, and converts mechanical vibration energy into electrical energy. This energy conversion method is based on the piezoelectric effect. The structural design of the device that evenly arrays multiple hexagonal cantilever bodies 3 outside the regular hexagonal prism base 1 and the cylindrical base 2 makes the energy conversion process more efficient, and can convert more mechanical energy into electrical energy output. The six sides of the hexagonal cantilever body 3 vibrate in different directions to achieve vibration energy collection in multiple directions. Compared with devices that can only collect energy in a single direction or limited directions, the energy collection efficiency is greatly improved, and the wind energy and vibration energy in the environment can be more fully utilized. The capture of wind energy and vibration energy in different directions ensures the continuity of the energy harvester output and provides more reliable continuous power supply for microelectronic devices and the like.

[0027] This embodiment provides a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly, wherein the six sides of the hexagonal cantilever 3 fixed to the side of the regular hexagonal prism base 1 form angles of ±0°, ±60° and ±120° with the horizontal plane respectively.

[0028] The hexagonal piezoelectric cantilever connected to the regular hexagonal prism base 1 mainly collects vibrations above and below in the vertical direction, as well as in the directions with angles of 60°, -60°, 120° and -120° to the vertical direction, adapting to the direction of vibration energy in the natural environment to achieve large energy output.

[0029] This embodiment provides a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly, wherein the six sides of the hexagonal cantilever 3 fixed to the side of the cylindrical base 2 form angles of ±30°, ±90° and ±150° with the horizontal plane respectively.

[0030] The hexagonal cantilever body 3 connected to the cylindrical base 2 mainly collects vibrations in the front and rear directions in the horizontal direction, as well as in the directions with angles of 60°, -60°, 120° and -120° with the horizontal direction. It adapts to the direction of vibrations brought to the hexagonal cantilever body 3 connected to the cylindrical base 2 after the cylindrical base 2 rotates driven by wind energy, so as to achieve large energy output.

[0031] The present embodiment provides a layered wind energy and vibration energy harvesting device assembled based on a hexagonal cantilever array. The hexagonal cantilever 3 includes six base layers 31, six piezoelectric layers 32 and a mass block 33. The six base layers 31 are spliced ​​together to form a hexagonal prism with a hollow interior. The six piezoelectric layers 32 are respectively adhered to the outer sides of the six base layers 31, and the mass block 33 is fixed to the free end of the hexagonal prism formed by splicing the six base layers 31 together.

[0032] The base layer 31 is preferably made of one of aluminum and copper. The mass block 33 is preferably a low-cost iron block.

[0033] This embodiment provides a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly, and the length and width of the piezoelectric layer 32 are adjustable.

[0034] By adjusting the size of the piezoelectric layer 32, the stress distribution and strain of the piezoelectric material during the vibration process can be changed, the electromechanical coupling efficiency of the piezoelectric material can be optimized, the power conversion efficiency can be further improved, and multi-modal energy harvesting can be achieved, so that the device can better adapt to vibration excitations of different frequencies and directions, thereby improving the energy harvesting effect.

[0035] This embodiment provides a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly, wherein the sizes of the several hexagonal cantilever bodies 3 on the side of the regular hexagonal prism base 1 or the cylindrical base 2 are different and are arranged in a gradually increasing or decreasing manner.

[0036] By adjusting and changing the cantilever beam size in the hexagonal cantilever body 3 on the regular hexagonal prism base 1 and the cylindrical base 2, the vibration frequency shift on different hexagonal cantilever bodies 3 can be achieved. This helps to broaden the low-frequency band in multi-dimensional directions, allowing the device to adapt to a wider range of vibration frequencies, especially when low-frequency environmental vibrations are more common, improving the energy harvester's ability to respond to vibrations of different frequencies and enhancing its adaptability in complex environments.

[0037] The present embodiment provides a layered wind energy and vibration energy harvesting device assembled based on a hexagonal cantilever array, wherein a connecting shaft 4 is provided through the central axis positions of the regular hexagonal prism base 1 and the cylindrical base 2, the connecting shaft 4 is fixedly connected to the regular hexagonal prism base 1, and the connecting shaft 4 is rotatably connected to the cylindrical base 2; a connecting groove is provided at the bottom of the connecting shaft 4, and a plug rod is fixedly connected to the top surface of the regular hexagonal prism base 1 or the cylindrical base 2 at the top of the connecting shaft 4, and the plug rod matches the connecting groove.

[0038] The regular hexagonal prism base 1 or cylindrical base 2 located below is connected by inserting the top insertion rod into the connecting groove of the regular hexagonal prism base 1 or cylindrical base 2 located above. The regular hexagonal prism base 1 is fixedly connected to the connecting shaft 4, and the cylindrical base 2 is rotatably connected to the connecting shaft 4. When wind blows, the cylindrical base 2 can rotate with the connecting shaft 4 as the axis.

[0039] This embodiment provides a layered wind energy and vibration energy harvesting device assembled based on a hexagonal cantilever array. The piezoelectric layer 32 is a piezoelectric material film with strong piezoelectricity and high piezoelectric constant. The piezoelectric layer 32 is spin-coated on the outer side of the base layer 31 by a spinning method.

[0040] The material of the piezoelectric layer 32 is preferably lead zirconate titanate, polyvinylidene fluoride, barium titanate, or a composite film of one or two or more thereof, or a composite film of one of them and C-based materials such as graphene, acetylene black, and carbon nanotubes.

[0041] This embodiment provides a layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly, wherein the regular hexagonal prism base 1 and the cylindrical base 2 are made of a highly elastic molecular material with a low Young's modulus.

[0042] The regular hexagonal prism base 1 and the cylindrical base 2 are made of highly elastic molecular materials with low Young's modulus such as polydimethylsiloxane PDMS, which have good flexibility, can better adapt to the vibration environment, and reduce the energy loss or damage risk caused by the rigid structure.

[0043] The details not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0044] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A layered wind energy and vibration energy harvesting device based on a hexagonal cantilever array assembly, characterized in that: include: A plurality of regular hexagonal prism bases (1) and a plurality of cylindrical bases (2), wherein the regular hexagonal prism bases (1) and the cylindrical bases (2) are arranged alternately up and down, the regular hexagonal prism bases (1) are fixed in position, and the cylindrical bases (2) can rotate along their central axes; the sides of the regular hexagonal prism bases (1) and the cylindrical bases (2) are both fixedly connected with a plurality of hexagonal cantilever bodies (3), and the plurality of hexagonal cantilever bodies (3) are electrically connected to each other.

2. The layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly according to claim 1 is characterized in that: The six sides of the hexagonal cantilever body (3) fixedly connected to the side surface of the regular hexagonal prism base (1) respectively form angles of ±0°, ±60° and ±120° with the horizontal plane.

3. The layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly according to claim 1 is characterized in that: The six sides of the hexagonal cantilever body (3) fixedly connected to the side surface of the cylindrical base (2) respectively form angles of ±30°, ±90° and ±150° with the horizontal plane.

4. The layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly according to claim 1 is characterized in that: The hexagonal cantilever body (3) comprises six base layers (31), six piezoelectric layers (32) and a mass block (33); the six base layers (31) are spliced ​​together to form a hexagonal prism with a hollow interior; the six piezoelectric layers (32) are respectively adhered to the outside of the six base layers (31); and the mass block (33) is fixed to the free end of the hexagonal prism formed by splicing the six base layers (31) together.

5. The layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly according to claim 4 is characterized in that: The length and width of the piezoelectric layer (32) are adjustable.

6. The layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly according to claim 1 is characterized in that: The sizes of the plurality of hexagonal cantilever bodies (3) on the side of the regular hexagonal prism base (1) or the cylindrical base (2) are different, and are arranged in a gradually increasing or decreasing manner.

7. The layered wind energy and vibration energy harvesting device based on hexagonal cantilever array assembly according to claim 1 is characterized in that: A connecting shaft (4) is provided through the central axis of the regular hexagonal prism base (1) and the cylindrical base (2); the connecting shaft (4) is fixedly connected to the regular hexagonal prism base (1), and the connecting shaft (4) is rotatably connected to the cylindrical base (2); a connecting groove is provided at the bottom of the connecting shaft (4); a plug rod is fixedly connected to the top surface of the regular hexagonal prism base (1) or the cylindrical base (2) at the top of the connecting shaft (4); the plug rod matches the connecting groove.

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