A magnetoelectric vibration generator

Abstract

The present invention discloses a magnetoelectric vibration generator, which includes a generator housing, induction coils and magnetic beads. The generator housing is fixedly installed on a sealed vibrating object. An accommodation cavity is provided inside the generator housing, and the magnetic beads are placed in the accommodation cavity. The cross-sectional area of the magnetic beads is smaller than that of the accommodation cavity so that the magnetic beads can move in the accommodation cavity. Coil grooves are provided on the outer surface of the generator housing, and the number of coil grooves is equal to the number of induction coils. The induction coils are correspondingly arranged around the coil grooves, and two power terminals are led out from the induction coils. The magnetic beads are used to generate a changing electromagnetic field in the accommodation cavity when the vibrating object vibrates; the induction coils are used to inductively generate alternating current when the magnetic beads vibrate to generate a changing electromagnetic field, and output voltage through the power terminals. By adopting the present invention, the vibration energy in a sealed environment can be converted into electrical energy, so as to provide a sustainable independent power supply in the sealed environment to continuously supply power to small electronic devices.

Description

Technical Field

[0001] The present invention relates to a generator technology, and particularly to a magnetoelectric vibration generator. Background Art

[0002] In existing magnetoelectric generators, an inertial body vibrates according to a specific type of law to change the magnetic flux of an induction coil to generate an induced current. However, in reality, the vibration of the inertial body is irregular in some vibration scenarios. Currently, there is a lack of a micro generator device that can convert the vibration energy in the environment into electrical energy and supply it continuously. In addition, in some real scenarios, a micro power supply device needs to be installed to supply power to small devices. For example, when detecting the tire pressure of a vehicle, a small wireless sensor needs to be installed, and these wireless sensors generally need to be powered by button batteries. However, the power supply time of button batteries is short and they need to be replaced frequently, increasing the vehicle maintenance cost and bringing inconvenience to users. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a magnetoelectric vibration generator that can convert the vibration energy in a closed environment into electrical energy, so as to provide a sustainable independent power supply in the closed environment to continuously supply power to small electronic devices.

[0004] To solve the above technical problem, the present invention provides a magnetoelectric vibration generator, including a generator housing, an induction coil and a magnetic bead. The generator housing is fixedly installed on a closed vibrating object. An accommodation cavity is provided inside the generator housing. The magnetic bead is placed in the accommodation cavity. The cross-sectional area of the magnetic bead is smaller than the cross-sectional area of the accommodation cavity so that the magnetic bead can move in the accommodation cavity. A coil groove is provided on the outer surface of the generator housing. The number of coil grooves is equal to the number of induction coils. The induction coils are correspondingly arranged around the coil grooves. Two power supply terminals are led out from the induction coils. The magnetic bead is used to generate a changing electromagnetic field when the vibrating object vibrates and move in the accommodation cavity accordingly. The induction coil is used to inductively generate an alternating current when the magnetic bead vibrates to generate a changing electromagnetic field, and output a voltage through the power supply terminals.

[0005] As an improvement of the above solution, the generator housing is made of a non-electromagnetic conductive material.

[0006] As an improvement of the above solution, when there are two or more induction coils, the like-named ends of the induction coils are connected, and the remaining two ends are the power supply terminals.

[0007] As an improvement of the above solution, a thin strip-shaped groove is further provided on the outer surface of the generator housing.

[0008] As an improvement of the above solution, the magnetic bead is a permanent neodymium iron boron magnet.

[0009] As an improvement of the above solution, the magnetic bead is spherical, and the accommodating cavity is a cylindrical accommodating cavity.

[0010] As an improvement of the above solution, a V-shaped groove is provided in the cylindrical accommodating cavity.

[0011] As an improvement of the above solution, the size of the generator housing is such that the bottom diameter is 8 mm and the length is 31 mm.

[0012] As an improvement of the above solution, the magnetoelectric vibration generator of the present invention further includes an energy storage capacitor, and both ends of the energy storage capacitor are respectively connected to two power supply terminals through a rectifying circuit.

[0013] The beneficial effects of implementing the present invention are as follows:

[0014] By implementing the magnetoelectric vibration generator of the present invention, the vibration energy in a closed environment can be converted into electrical energy, thereby providing a sustainable independent power supply in the closed environment to continuously power small electronic devices.

[0015] Specifically, first, the generator housing is fixedly installed on the vibrating object. An accommodating cavity is provided inside the generator housing, and magnetic beads are placed in the accommodating cavity. Since the cross-sectional area of the magnetic beads is smaller than the cross-sectional area of the accommodating cavity, when the vibrating object vibrates, the magnetic beads will vibrate in the accommodating cavity following the vibrating object, thereby generating a magnetic field. Second, the outer surface of the generator housing is provided with coil grooves, and the number of coil grooves is equal to the number of induction coils. The induction coils are correspondingly arranged around in the coil grooves. Two power supply terminals are led out from the induction coils. When the magnetic beads vibrate in the accommodating cavity and generate a changing electromagnetic field, the magnetic flux of the induction coils changes, thereby inducing an induced current, and the induced voltage is output through the power supply terminals. Through the above two processes, the magnetoelectric vibration generator of the present invention converts the vibration energy of the vibrating object into electrical energy, thus making full use of the vibration energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an embodiment of the magnetoelectric vibration generator of the present invention;

[0017] Figure 2 is a schematic structural diagram of the generator housing of an embodiment of the magnetoelectric vibration generator of the present invention;

[0018] Figure 3 is a cross-sectional view of the generator housing of an embodiment of the magnetoelectric vibration generator of the present invention;

[0019] Figure 4 is a partial enlarged view of the cross-section of the generator housing of an embodiment of the magnetoelectric vibration generator of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the orientation terms such as up, down, left, right, front, back, inside and outside that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention and do not specifically limit the present invention.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the magnetoelectric vibration generator of the present invention. Figure 2 It is a schematic structural diagram of the generator housing of the magnetoelectric vibration generator of the present invention. The magnetoelectric vibration generator of the present invention includes a generator housing 1, an induction coil 2 and magnetic beads 3. The generator housing is fixedly installed on a sealed vibrating object. An accommodation cavity 11 is provided inside the generator housing. The magnetic beads 3 are placed in the accommodation cavity 11. The cross-sectional area of the magnetic beads 3 is smaller than the cross-sectional area of the accommodation cavity 11 so that the magnetic beads 3 can move in the accommodation cavity 11. A coil groove 12 is provided on the outer surface of the generator housing 1. The number of coil grooves is equal to the number of induction coils. In this embodiment, the number of both the coil grooves and the induction coils is 3. The induction coil 2 is correspondingly arranged around the coil groove 12. Two power supply terminals 21 are led out from the induction coil 2.

[0022] The magnetic beads 3 are used to follow the vibration in the accommodation cavity and generate a changing electromagnetic field when the vibrating object vibrates. The induction coil 2 is used to inductively generate alternating current when the magnetic beads vibrate to generate a changing electromagnetic field and output voltage through the power supply terminals.

[0023] Implementing the magnetoelectric vibration generator of the present invention can convert the vibration energy in a sealed environment into electrical energy, thereby providing a sustainable independent power supply in the sealed environment to continuously supply power to small electronic devices.

[0024] Specifically, first, the generator housing 1 is fixedly installed on the vibrating object. An accommodation cavity 11 is provided inside the generator housing. The magnetic beads 3 are placed in the accommodation cavity 11. Since the cross-sectional area of the magnetic beads is smaller than the cross-sectional area of the accommodation cavity, when the vibrating object vibrates, the magnetic beads will follow the vibrating object and vibrate in the accommodation cavity, thereby generating a magnetic field. Second, a coil groove 12 is provided on the outer surface of the generator housing. The number of coil grooves is equal to the number of induction coils. The induction coil 2 is correspondingly arranged around the coil groove 12. Two power supply terminals 21 are led out from the induction coil. When the magnetic beads vibrate in the accommodation cavity and generate a changing electromagnetic field, the magnetic flux of the induction coil changes, thereby inductively generating an induced current, and the induced current is output through the power supply terminals. Through the above two processes, the magnetoelectric vibration generator of the present invention converts the vibration energy of the vibrating object into electrical energy, thereby making full use of the vibration energy.

[0025] It should be noted that an important technical advantage of the magnetoelectric vibration generator of the present invention is that it can be applied in a closed environment, such as being installed inside a closed vehicle tire. When the vehicle is running, the vibration energy generated during the rotation and bumping of the tire is converted into electrical energy by the magnetoelectric vibration generator of the present invention for use by a wireless sensor also installed inside the tire to detect the tire pressure of the vehicle.

[0026] The generator housing is made of non-electromagnetic conductive material.

[0027] The generator housing made of non-metallic material can reduce the electromagnetic interference to the induction coil and improve the efficiency of converting the vibration energy of the magnetic beads into electrical energy.

[0028] When there are two or more induction coils, the like-named ends of the induction coils are connected, and the remaining two ends are the power supply ends.

[0029] By connecting the like-named ends of the induction coils in sequence and using the remaining two ends as the power supply ends, the output voltage can be effectively increased.

[0030] The outer surface of the generator housing 1 is also provided with a thin strip-shaped groove 13.

[0031] After the thin strip-shaped groove 13 is provided on the outer surface of the generator housing 1, the connection lines between the induction coils can be arranged in the thin strip-shaped groove 13, thereby protecting the lines and simplifying the line arrangement work.

[0032] The magnetic beads are permanent neodymium iron boron magnets.

[0033] The permanent neodymium iron boron magnet can maintain its magnetism for a long time and does not need to be replaced frequently.

[0034] The magnetic beads are spherical, and the accommodating cavity is a cylindrical accommodating cavity.

[0035] The spherical magnetic beads cooperate with the cylindrical accommodating cavity, effectively reducing the friction force between the magnetic beads and the accommodating cavity, thereby reducing the vibration energy loss due to the mutual friction between the magnetic beads and the accommodating cavity, so that most of the vibration energy can be converted into electrical energy.

[0036] The cylindrical accommodating cavity is provided with a V-shaped groove 14.

[0037] Figure 3 is a cross-sectional view of the generator housing 1, Figure 4 is Figure 3 a partial enlarged view of part A in Figure 3 shows that there are 4 V-shaped grooves in the cylindrical accommodating cavity, and the direction of the V-shaped grooves is the same as that of the thin strip-shaped groove 13. The V-shaped grooves can play a certain role in restricting the moving direction of the magnetic beads. Figure 4 shows the shape characteristics of the V-shaped grooves, which can effectively reduce the air damping when the magnetic beads move along the V-shaped grooves in the accommodating cavity 11.

[0038] The bottom diameter of the generator housing is 8 mm and the length is 31 mm.

[0039] The generator housing is small in size, which is convenient for installation on various vibrating objects. For example, in a device for detecting the tire pressure of a vehicle, there are small detection devices such as wireless sensors. These devices require continuous and effective power supply. By installing the magnetoelectric vibration generator of the present invention on such small electronic devices that require continuous power supply as wireless sensors, the power supply problem can be solved.

[0040] The magnetoelectric vibration generator of the present invention further includes an energy storage capacitor. The two ends of the energy storage capacitor are respectively connected to the two power supply terminals through a rectifying circuit.

[0041] Since the vibration energy of the vibrating object cannot be converted into continuous and stable alternating current, when the vibration energy occurs, the converted electric energy can be stored in the energy storage capacitor, and the electric energy of the energy storage capacitor can be used for power supply when needed.

[0042] In addition, the magnetoelectric vibration generator of the present invention may further include a rectifier bridge and a filter energy storage capacitor. The two power supply terminals led out by the induction coil are respectively connected to the first input terminal and the second input terminal of the rectifier bridge, and the output terminal of the rectifier bridge is connected to the filter energy storage capacitor.

[0043] The rectifier bridge and the filter energy storage capacitor are used to rectify and filter the current output from the power supply terminal, and then output stable direct current for use by electronic devices. At the same time, the filter energy storage capacitor can also play a role in energy storage.

[0044] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A magnetoelectric vibration generator, characterized in that, it includes a generator housing, an induction coil and magnetic beads. The generator housing is fixedly installed on a sealed vibrating object. An accommodation cavity is provided inside the generator housing. The magnetic beads are placed in the accommodation cavity. The cross-sectional area of the magnetic beads is smaller than that of the accommodation cavity so that the magnetic beads can move in the accommodation cavity; a coil groove is provided on the outer surface of the generator housing. The number of the coil grooves is equal to the number of the induction coils. The induction coils are correspondingly arranged around in the coil grooves. Two power terminals are led out from the induction coils; the magnetic beads are used to follow the vibration in the accommodation cavity and generate a changing electromagnetic field when the vibrating object vibrates; the induction coil is used to inductively generate alternating current when the magnetic beads vibrate to generate a changing electromagnetic field, and output voltage through the power terminals; a thin strip-shaped groove is further provided on the outer surface of the generator housing. The thin strip-shaped groove is located between two adjacent coil grooves and communicates with two adjacent coil grooves; the magnetic beads are spherical, and the accommodation cavity is a cylindrical accommodation cavity; a V-shaped groove is provided in the cylindrical accommodation cavity. The trend of the V-shaped groove is the same as that of the thin strip-shaped groove.

2. The magnetoelectric vibration generator according to claim 1, characterized in that, the generator housing is made of non-electromagnetic conductive material.

3. The magnetoelectric vibration generator according to claim 1, characterized in that, when there are two or more induction coils, the like-named ends between the induction coils are connected, and the remaining two ends are the power terminals.

4. The magnetoelectric vibration generator according to claim 1, characterized in that, the magnetic beads are permanent neodymium iron boron magnets.

5. The magnetoelectric vibration generator according to claim 1, characterized in that, the bottom surface diameter of the generator housing is 8 mm and the length is 31 mm.

6. The magnetoelectric vibration generator according to claim 1, characterized in that, it further includes an energy storage capacitor. Two ends of the energy storage capacitor are respectively connected to the two power terminals through a rectifying circuit.

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