A rolling magnet monostable electromagnetic energy capture device

Abstract

The present invention provides a rolling magnet monostable electromagnetic energy capture device, comprising a fixed magnet, two limiting magnets, a moving magnet, and a coil. The fixed magnet is configured as an elongated strip, with one of its long sides serving as a moving track. The two limiting magnets are respectively positioned at the head and tail ends of the fixed magnet's moving track. All magnets are arranged in a plane, and the moving magnet is configured to move only along the moving track. There is an attractive force between the moving magnet and the fixed magnet, and a repulsive force between the moving magnet and the two limiting magnets. The coil is arranged on one side of the moving track, with the moving magnet's trajectory passing through one end of the coil to generate an induced current in the coil. This rolling magnet monostable electromagnetic energy capture device has the advantages of a wide response bandwidth, simple structure, and long life.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic vibration energy capture, in particular to a rolling magnet type monostable electromagnetic energy capture device. Background Art

[0002] With the rapid development of low-power, high-performance microprocessors and microsensor technologies, a large number of wireless sensors are being applied to important applications such as health monitoring, equipment status monitoring, and battlefield situation awareness. These devices can provide real-time feedback on the status of monitored objects, effectively improving the response speed to emergency events.

[0003] In addition, the rapid development of wearable technology has prompted a large number of portable electronic devices and embedded health monitoring devices to be applied in people's daily lives. These devices can monitor the body's movement status in real time and effectively prevent the occurrence of major diseases.

[0004] At present, such electronic devices are still powered by traditional batteries. Due to their limited size and capacity, they need to be replaced and charged regularly to maintain the stable demand of the equipment. There are also problems such as environmental pollution and recycling difficulties. Especially in some extremely harsh environments, the cost of replacing batteries is higher than the product itself, and it is even difficult to complete. Based on this situation, energy capture technology has been developed to capture energy in natural resources to power devices.

[0005] Vibration energy capture technology is one of them. It can convert vibration energy in the environment into electrical energy, store this energy through energy management components, and can be used to power wireless sensors and portable electronic devices. It has attracted widespread attention from academia and industry.

[0006] The electromagnetic energy capture structure in vibration energy capture technology has greater advantages in practical applications due to its low internal resistance and high output power.

[0007] Traditional electromagnetic vibration energy capture structures are mostly designed based on the principle of linear resonance, generating significant energy near their natural frequencies. Integrating this electromagnetic energy capture structure with an external circuit can create a complete self-powered system, replacing batteries to power low-power electronic devices.

[0008] However, the frequency band of the linear structure is very narrow, and when the external excitation frequency deviates from the natural frequency, the energy capture performance will be greatly affected.

[0009] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0010] The object of the present invention is to address the deficiencies of the prior art and thereby provide a rolling magnet type monostable electromagnetic energy capture device that can broaden the response bandwidth and improve the energy capture efficiency.

[0011] Specifically, the rolling magnet type monostable electromagnetic energy capture device uses a long permanent magnet as a moving track, and a cylindrical moving magnet cooperates with it to roll on the moving track, and then adds a pair of limiting magnets to limit the vibration range of the moving magnet. By receiving external excitation, the moving magnet produces displacement and generates electrical energy when passing through the coil. Under the action of the limiting magnet and the fixed magnet, the monostable characteristics are realized. By adjusting the spacing between the limiting magnets, the device can be adjusted to adapt to different environmental vibration frequencies and improve the energy capture efficiency.

[0012] In order to achieve the above object, the technical solution adopted by the present invention is: a rolling magnet type monostable electromagnetic energy capture device, comprising a fixed magnet, two limiting magnets, a moving magnet and a coil;

[0013] The fixed magnet is configured in a long strip shape, and one of the long sides of the fixed magnet serves as a motion track;

[0014] The two limiting magnets are respectively arranged at the head and tail ends of the fixed magnet motion track;

[0015] The magnets are all arranged in a plane, the moving magnet is configured to move only along the moving track, there is an attractive force between the moving magnet and the fixed magnet, and there is a repulsive force between the moving magnet and the two limiting magnets;

[0016] The coil is configured to be arranged on one side of the moving track, and the moving track of the moving magnet passes through one end of the coil so as to generate an induced current in the coil.

[0017] Based on the above, the moving magnet and the two limiting magnets are both cylindrical or column-shaped, and the diameters of the moving magnet and the two limiting magnets are equal, and the moving magnet is in rolling cooperation with the moving track.

[0018] Based on the above, the thickness of the moving magnet is equal to the thickness of the fixed magnet.

[0019] Based on the above, the position of the limiting magnet on the motion track is adjustable.

[0020] Based on the above, the fixed magnet is a rectangular strip structure or a strip structure with an arc.

[0021] Based on the above, one of the vertical side surfaces of the fixed magnet serves as a motion track, and a supporting structure for supporting the movement of the moving magnet is provided at the bottom end of the motion track.

[0022] Based on the above, guardrails for limiting the displacement of the moving magnet are provided on opposite sides of the moving track. The guardrails, the supporting structure, the moving track and the two limiting magnets together form a closed moving space, and the moving magnet is located in the moving space.

[0023] Based on the above, the side surface of the fixed magnet serves as a moving track, and the moving magnet and the moving track are in rolling cooperation.

[0024] Based on the above, the coil is a copper core enameled wire structure, and the coil is externally connected to an electric energy collection module.

[0025] Based on the above, the supporting structure is a planar supporting surface, the coil is embedded in the supporting surface, and the axis of the coil passes through the motion trajectory of the moving magnet.

[0026] Based on the above, the vacant surface of the movement space is provided with an end cover.

[0027] Compared with the existing technology, the present invention has outstanding substantial features and significant progress. Specifically, the present invention designs a long fixed magnet, and uses one of its side surfaces as a track surface. The moving magnet moves along the track surface, and the moving magnet and the fixed magnet are attractive. The advantages of this design are: the moving magnet is less restricted and has high sensitivity to external excitation, and can receive more external excitation. At the same time, the fixed magnet attracts the moving magnet and does not deviate from its motion track, so that it has higher sensitivity under regular motion; the limiting magnets at both ends are used to limit the travel range of the moving magnet, prompting the moving magnet to generate back and forth motion after receiving external excitation, and then frequently pass through the coil, causing the coil to generate current, thereby improving the power generation efficiency.

[0028] Furthermore, the diameters of the two limiting magnets, the moving magnet, and the thickness of the fixed magnet are equal, so that the motion state of the moving magnet is easy to calculate and controllable, and the moving magnet can also achieve a relatively regular motion state.

[0029] Furthermore, by adjusting the distance between the two limiting magnets, a monostable system with different nonlinear restoring forces can be realized, thereby adapting to different environmental vibration frequencies, improving energy capture efficiency, and broadening the response bandwidth, solving the problem of the current linear system's narrow frequency band.

[0030] Furthermore, designing a motion space enclosed by the motion trajectory can enhance the application scenarios of the device and diversify its applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural principle diagram of the rolling magnet type monostable electromagnetic energy capture device in the present invention.

[0032] Figure 2It is a top view of the rolling magnet monostable electromagnetic energy capture device in Example 1 of the present invention.

[0033] Figure 3 It is a side view of the rolling magnet type monostable electromagnetic energy capture device in Example 2 of the present invention.

[0034] Figure 4 It is a structural diagram of the rolling magnet type monostable electromagnetic energy capture device in Example 3 of the present invention.

[0035] In the figure: 1. Fixed magnet; 2. Moving magnet; 3. Limiting magnet; 4. Moving track; 5. Coil; 6. Support structure; 7. Guardrail; 8. End cover. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0037] Example 1

[0038] like Figure 1 and Figure 2 As shown, a rolling magnet type monostable electromagnetic energy capture device includes a fixed magnet 1, two limiting magnets 2, a moving magnet 3 and a coil 5;

[0039] The fixed magnet 1 is configured as a long strip, and one of the long sides of the fixed magnet 1 serves as the moving track 4. In this embodiment, one of the vertical sides of the fixed magnet 1 serves as the moving track 4, and a supporting structure 6 is provided below the fixed magnet, such as a supporting plane serving as a limiting surface or supporting surface for the movement of the moving magnet.

[0040] The two limiting magnets 2 are respectively arranged at the head and tail ends of the moving track 4 of the fixed magnet 1, and their main function is to limit the travel range of the moving magnet.

[0041] The moving magnet 3 is configured to move only along the moving track 4. There is an attractive force between the moving magnet 3 and the fixed magnet 1, and a repulsive force between the moving magnet 3 and the two limiting magnets 2. The fixed magnet 1 prevents the moving magnet from deviating from the moving track by attracting the moving magnet, and the limiting magnet 2 drives the moving magnet to reciprocate on the moving track 4 between the two limiting magnets through the repulsive force.

[0042] The coil 5 is configured to be arranged on one side of the moving track 4, and the moving trajectory of the moving magnet 3 passes through one end of the coil 5 so as to generate an induced current in the coil 5. In this embodiment, the coil 5 uses a copper-core enameled wire and an external power collection module to convert, store or output the collected electrical energy.

[0043] Working principle: When capturing vibration energy, the device can be excited in the same direction as the moving track 4 of the moving magnet 3. Under the excitation, the moving magnet 3 rolls along the surface of the moving track 4 of the fixed magnet 1, thereby generating a changing magnetic field, thereby generating an induced current in the coil 5. By drawing out the current in the coil 5 and collecting it, the open-circuit voltage of the coil 5 can be obtained.

[0044] When the device is placed horizontally, it exhibits monostable characteristics.

[0045] Preferably, in order to broaden the response bandwidth, the position of the limiting magnet 3 on the motion track 4 is adjustable. By adjusting the distance between the two limiting magnets 3, a monostable system with different nonlinear restoring forces can be realized, thereby adapting to different environmental vibration frequencies and improving energy capture efficiency.

[0046] Example 2

[0047] like Figure 3 As shown, in this embodiment, in order to optimize the performance of the device, the moving magnet 3 and the two limiting magnets 2 are set as cylinders, and the diameters of the moving magnet 3 and the two limiting magnets 2 are equal, the moving magnet 3 and the moving track 4 are in rolling cooperation, and the thickness of the moving magnet 3 is equal to the thickness of the fixed magnet 1.

[0048] The fixed magnet 1 is a rectangular long strip structure, and one of the vertical side surfaces of the fixed magnet 1 serves as a moving track. The bottom end of the moving track 4 is provided with a supporting structure 6 for supporting the movement of the moving magnet. The supporting structure 6 is a planar supporting surface in this embodiment, and the coil 5 is embedded in the supporting surface. The axis of the coil 5 passes through the moving track of the moving magnet 3.

[0049] Example 3

[0050] like Figure 4 As shown, a guardrail 7 for limiting the displacement of the moving magnet is provided on the opposite side of the moving track 4. The guardrail 7, the supporting structure 6, the moving track 4 and the two limiting magnets 2 together form a closed moving space, and the moving magnet is located in the moving space. This structure can adapt to more application environments, is less restricted, and external excitation can also be directly applied to the external structure.

[0051] Preferably, the vacant surface of the movement space is provided with an end cover, and by completely enclosing the moving magnet in the closed space, the device can be applied to a wider range of application fields, such as powering portable electronic components.

[0052] In other embodiments, the fixed magnet may be a long strip structure with an arc, and the movable track of the fixed magnet is designed to be the top surface. The moving magnet 3 will also produce a reciprocating motion under the influence of its own gravity during the movement process.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. A rolling magnet monostable electromagnetic energy capture device, characterized in that: It includes a fixed magnet, two limiting magnets, a moving magnet and a coil; The fixed magnet is configured in a long strip shape, and one of the long sides of the fixed magnet serves as a motion track; Two limiting magnets are respectively arranged at the head and tail ends of the fixed magnet motion track; The magnets are all arranged in a plane, the moving magnet is configured to move only along the moving track, there is an attractive force between the moving magnet and the fixed magnet, and there is a repulsive force between the moving magnet and the two limiting magnets; The coil is configured to be arranged on one side of the moving track, and the moving trajectory of the moving magnet passes through one end of the coil so as to generate an induced current in the coil; the moving magnet and the two limiting magnets are both cylindrical or annular, and the diameters of the moving magnet and the two limiting magnets are equal, the moving magnet is in rolling engagement with the moving track, and the thickness of the moving magnet is equal to the thickness of the fixed magnet.

2. The rolling magnet monostable electromagnetic energy capture device according to claim 1, characterized in that: The position of the limiting magnet on the motion track is adjustable.

3. The rolling magnet monostable electromagnetic energy capture device according to claim 2, characterized in that: The fixed magnet is a rectangular strip structure or a curved strip structure.

4. The rolling magnet monostable electromagnetic energy capture device according to any one of claims 1 to 3, characterized in that: One of the vertical side surfaces of the fixed magnet serves as a moving track, the moving magnet and the moving track are in rolling cooperation, and a supporting structure for supporting the movement of the moving magnet is provided at the bottom end of the moving track.

5. The rolling magnet monostable electromagnetic energy capture device according to claim 4, characterized in that: Guardrails for limiting the displacement of the moving magnet are provided on opposite sides of the moving track. The guardrails, the supporting structure, the moving track and the two limiting magnets together form a closed moving space, and the moving magnet is located in the moving space.

6. The rolling magnet monostable electromagnetic energy capture device according to claim 5, characterized in that: The coil is a copper core enameled wire structure, and the coil is externally connected to an electric energy collection module.

7. The rolling magnet monostable electromagnetic energy capture device according to claim 4, characterized in that: The supporting structure is a planar supporting surface, the coil is embedded in the supporting surface, and the axis of the coil passes through the motion track of the moving magnet.

8. The rolling magnet monostable electromagnetic energy capture device according to claim 7, characterized in that: The vacant surface of the movement space is provided with an end cover.

Images