Bell-shaped dual-mode vibration energy collector

Abstract

The bell-shaped dual-mode vibration energy collector comprises an insulating shell, the insulating shell is of a box type structure defined by a back plate, a face plate, a left side plate, a right side plate, a top plate and a bottom plate, a first magnet is arranged in the middle of the bottom plate, a pendulum is arranged in the insulating shell and comprises a connecting rod and a pendulum body fixed to the lower end of the connecting rod, and the connecting rod is connected with the pendulum body. The upper end of the connecting rod is installed on the back plate through a rigid rod, a second magnet is arranged at the bottom of the swing body, the first magnet and the second magnet are arranged in an N pole opposite mode, a friction film is arranged between the swing body and the back plate, and collision films are symmetrically arranged between the swing body and the left side plate and between the swing body and the right side plate. Small-amplitude low-speed low-frequency vibration can be converted into large-amplitude high-speed motion response, and the low-frequency vibration energy collection efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to a bell-shaped dual-mode vibration energy collector. Background Art

[0002] In view of the various shortcomings of existing vibration energy harvesting technology, researchers have begun to explore new energy harvesting methods. Sliding friction phenomena are widely present in daily life and industrial production. For example, the relative sliding between mechanical parts and the movement of human joints will produce sliding friction. The sliding friction vibration energy harvester is a new type of energy harvesting device proposed based on this common physical phenomenon. It aims to utilize the vibration mechanical energy generated during the sliding friction process and efficiently convert it into electrical energy through a specific friction conversion mechanism, providing a new way to solve the energy problem of small electronic devices.

[0003] Compared with traditional vibration energy harvesters, sliding friction vibration energy harvesters have unique advantages. They can adapt to a wider range of vibration frequencies and amplitudes, and can utilize some originally neglected tiny sliding friction energy sources, which is expected to play a role in more practical scenarios. As an emerging energy harvesting technology, sliding friction vibration energy harvesters have great potential in solving the energy supply problem of modern electronic devices. Their research and development are of great significance to promoting sustainable energy development and autonomous operation of electronic devices.

[0004] At present, the vibration energy harvesters that have received widespread attention mainly include electromagnetic vibration energy harvesters, electrostatic vibration energy harvesters, triboelectric vibration energy harvesters and piezoelectric vibration energy harvesters. Triboelectric vibration energy harvesters have significant advantages such as high energy conversion efficiency, simple structure and processing, and have thus received widespread attention in vibration energy harvesting. Among them, adding a collision mechanism to the triboelectric vibration energy harvester to form a sliding dual-mode vibration harvester, electromagnetic has the advantages of simple structure and simple design, and is widely used in triboelectric energy harvesters. Triboelectric vibration energy harvesters have been widely used in vibration energy harvesting of mechanical equipment. Although triboelectric vibration energy harvesters have shown excellent energy conversion effects in vibration energy harvesting of mechanical equipment and have been promoted and applied, they are rarely reported in bistable sliding triboelectric vibration energy harvesters, and the impact of installing a bistable sliding triboelectric vibration energy harvester on the contact behavior of the friction interface and the corresponding energy conversion mechanism are still unclear. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a bell-shaped dual-mode vibration energy harvester with simple structure and high energy collection efficiency.

[0006] The technical solution of the present invention to solve the above technical problems is: a bell-shaped dual-mode vibration energy collector, including an insulating shell, wherein the insulating shell is a box-type structure enclosed by a back plate, a face plate, a left plate, a right plate, a top plate and a bottom plate, a first magnet is provided in the middle position of the bottom plate, a pendulum is provided in the insulating shell, the pendulum includes a connecting rod and a pendulum body fixed at the lower end of the connecting rod, the upper end of the connecting rod is mounted on the back plate through a rigid rod, a second magnet is provided at the bottom of the pendulum body, the first magnet and the second magnet are arranged with their N poles facing each other, a friction film is provided between the pendulum body and the back plate, and collision films are symmetrically provided between the pendulum body and the left plate and the right plate.

[0007] In the bell-shaped dual-mode vibration energy collector, the friction film is a three-layer structure, including a first FEP film in the middle, and a first copper film is arranged on both the inner and outer sides of the first FEP film.

[0008] In the above-mentioned bell-shaped dual-mode vibration energy collector, the first FEP film and the first copper film located on the inner side of the first FEP film are both attached to the pendulum body, and the first copper film located on the outer side of the first FEP film is attached to the back plate.

[0009] In the bell-shaped dual-mode vibration energy collector, the pendulum, the first FEP film, and the first copper film are all pentagonal.

[0010] In the bell-shaped dual-mode vibration energy collector, the collision film is a three-layer structure, including a second FEP film in the middle, and a second copper film is arranged on both the inner and outer sides of the second FEP film.

[0011] In the above-mentioned bell-shaped dual-mode vibration energy collector, the second FEP film and the second copper film located on the inner side of the second FEP film are both attached to the side of the pendulum body, and the second copper film located on the outer side of the second FEP film is attached to the corresponding left plate or right plate.

[0012] In the bell-shaped dual-mode vibration energy harvester, the second FEP film and the second copper film are both square.

[0013] In the above-mentioned bell-shaped dual-mode vibration energy collector, when the pendulum is located in the middle position, the pendulum is in a bistable equilibrium state.

[0014] In the bell-shaped dual-mode vibration energy collector, the back plate, the front plate, the left plate, the right plate, the top plate and the bottom plate are all made of insulating materials.

[0015] In the above-mentioned bell-shaped dual-mode vibration energy collector, the first magnet and the second magnet are of the same size and are located in the same vertical plane.

[0016] The beneficial effects of the present invention are: 1 The present invention utilizes the repulsive force between magnets to realize negative stiffness. The action force between the first magnet and the second magnet is combined with the negative stiffness to form a bistable structure. A friction film is provided at the relative sliding friction part between the pendulum and the back plate to realize friction nano-power generation. A collision film is provided at the collision part between the side of the pendulum and the left and right side plates to realize friction nano-power generation. The bistable structure is combined with friction nano-power generation and collision nano-power generation, and the sliding power generation mode is combined with the collision power generation mode, which are jointly applied to nano-power generation. By utilizing the bistable mechanical mechanism, a small amplitude and low speed low-frequency vibration can be converted into a large and high-speed motion response, which significantly improves the low-frequency vibration energy collection efficiency.

[0017] 2. Under low-frequency environmental vibration, the present invention can adjust the potential energy barrier height of the bistable structure by changing the distance between the first magnet and the second magnet, thereby broadening the bandwidth of the low-frequency vibration energy collection frequency band and enhancing environmental applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the friction film and the collision film of the present invention.

[0020] Figure 3 It is the stiffness-angular displacement curve diagram of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1 , Figure 2 As shown, a bell-shaped dual-mode vibration energy collector includes an insulating shell, which is a box-type structure surrounded by a back plate 1, a panel 3, a left side plate 2-2, a right side plate 2-3, a top plate 2-4 and a bottom plate 2-1. The panel 3 is hinged to achieve opening and closing, and the back plate 1, the panel 3, the left side plate 2-2, the right side plate 2-3, the top plate 2-4 and the bottom plate 2-1 are all made of insulating materials.

[0023] A first magnet 8 is provided in the middle position of the bottom plate 2-1, and a pendulum 7 is provided in the insulating shell. The pendulum 7 includes a connecting rod and a pendulum body fixed at the lower end of the connecting rod. The upper end of the connecting rod is mounted on the back plate 1 through a rigid rod 6. A second magnet 5 is provided at the bottom of the pendulum body. The first magnet 8 and the second magnet 5 are arranged with their N poles facing each other. The first magnet 8 and the second magnet 5 are of the same size and are located in the same vertical plane. A friction film 9 is provided between the pendulum body and the back plate 1, and collision films 10 are symmetrically provided between the pendulum body and the left plate 2-2 and the right plate 2-3.

[0024] The friction film 9 is a three-layer structure, including a first FEP film 9-2 in the middle, and a first copper film 9-1 is arranged on both the inner and outer sides of the first FEP film 9-2. The first FEP film 9-2 and the first copper film 9-1 located inside the first FEP film 9-2 are both attached to the pendulum body, and the first copper film 9-1 located outside the first FEP film 9-2 is attached to the back plate 1. The pendulum body, the first FEP film 9-2, and the first copper film 9-1 are all pentagonal.

[0025] The collision film 10 is a three-layer structure, including a second FEP film 10-2 in the middle, and a second copper film 10-1 is arranged on both the inner and outer sides of the second FEP film 10-2. The second FEP film 10-2 and the second copper film 10-1 located inside the second FEP film 10-2 are both attached to the side of the pendulum body, and the second copper film 10-1 located outside the second FEP film 10-2 is attached to the corresponding left plate 2-2 or right plate 2-3. The second FEP film 10-2 and the second copper film 10-1 are both square.

[0026] When the pendulum 7 is located at the middle position, the pendulum 7 is in a bistable equilibrium state.

[0027] The working process of the present invention is as follows: under the external low-frequency vibration excitation, the present invention moves as a whole, and under the repulsive force of the first magnet 8 and the second magnet 5, the pendulum 7 and the insulating shell move relative to each other. Figure 3 As shown, from the perspective of the restoring force of the bistable structure, when the pendulum 7 rotates from the vertical state, there are two corresponding curve protrusions, and the restoring force is back to the middle position, converting the magnetic potential energy into kinetic energy, which will make its rotation speed faster and the amplitude larger. Gravity and magnetic force are balanced with each other. Under the action of low-frequency vibration, the equilibrium state will be broken, and the pendulum 7 will hit the left plate 2-2 and the right plate 2-3, thereby converting the low-frequency vibration into a large amplitude and high-speed motion). The pendulum 7 will produce a large amplitude and high-speed motion response, and a large potential difference will be generated between the first FEP film 9-2 and the first copper film 9-1, thereby generating a large output voltage. A large potential difference will be generated between the second FEP film 10-2 and the second copper film 10-1, thereby generating a large output voltage. Therefore, the present invention can convert a small amplitude and low-speed vibration into a large-speed motion response, thereby efficiently collecting low-frequency vibration energy.

Claims

1. A bell-shaped dual-mode vibration energy harvester, characterized in that: The invention comprises an insulating shell, which is a box-type structure surrounded by a back plate, a front plate, a left plate, a right plate, a top plate and a bottom plate. A first magnet is arranged in the middle of the bottom plate. A pendulum is arranged in the insulating shell. The pendulum comprises a connecting rod and a pendulum body fixed at the lower end of the connecting rod. The upper end of the connecting rod is mounted on the back plate through a rigid rod. A second magnet is arranged at the bottom of the pendulum body. The first magnet and the second magnet are arranged with their N poles facing each other. A friction film is arranged between the pendulum body and the back plate. Collision films are symmetrically arranged between the pendulum body and the left plate and the right plate.

2. The bell-shaped dual-mode vibration energy harvester according to claim 1, characterized in that: The friction film is a three-layer structure, including a first FEP film in the middle, and a first copper film is arranged on both the inner and outer sides of the first FEP film.

3. The bell-shaped dual-mode vibration energy harvester according to claim 2, characterized in that: The first FEP film and the first copper film located inside the first FEP film are both attached to the pendulum body, and the first copper film located outside the first FEP film is attached to the back plate.

4. The bell-shaped dual-mode vibration energy harvester according to claim 3, characterized in that: The pendulum body, the first FEP film and the first copper film are all pentagonal.

5. The bell-shaped dual-mode vibration energy harvester according to claim 1, characterized in that: The collision film is a three-layer structure, including a second FEP film in the middle, and a second copper film is arranged on both the inner and outer sides of the second FEP film.

6. The bell-shaped dual-mode vibration energy harvester according to claim 5, characterized in that: The second FEP film and the second copper film located inside the second FEP film are both attached to the side surface of the pendulum body, and the second copper film located outside the second FEP film is attached to the corresponding left plate or right plate.

7. The bell-shaped dual-mode vibration energy harvester according to claim 6, characterized in that: The second FEP film and the second copper film are both in a square shape.

8. The bell-shaped dual-mode vibration energy harvester according to claim 1, characterized in that: When the pendulum is in the middle position, the pendulum is in a bistable equilibrium state.

9. The bell-shaped dual-mode vibration energy harvester according to claim 1, characterized in that: The back plate, the front plate, the left plate, the right plate, the top plate and the bottom plate are all made of insulating materials.

10. The bell-shaped dual-mode vibration energy harvester according to claim 1, characterized in that: The first magnet and the second magnet are of the same size and are located in the same vertical plane.

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