CN116683724A - Miniature three-dimensional energy acquisition device - Google Patents
Miniature three-dimensional energy acquisition device Download PDFInfo
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- CN116683724A CN116683724A CN202310712302.0A CN202310712302A CN116683724A CN 116683724 A CN116683724 A CN 116683724A CN 202310712302 A CN202310712302 A CN 202310712302A CN 116683724 A CN116683724 A CN 116683724A
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- frame body
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The invention belongs to the technical field of energy collection, and particularly provides a miniature three-dimensional energy collection device which comprises a support shell structure, a coil, a center magnet and a linear spring, wherein the support shell structure is arranged on the support shell structure; the support shell structure comprises a frame body, a front end cover plate and a rear end cover plate, wherein the middle of the frame body is rectangular, a wire slot is formed in the outer portion of the frame body and used for arranging a series wire, and a plurality of coil slots are formed in four wall surfaces in the frame body and used for placing coils respectively; the frame body is provided with a connector; the front end cover plate and the rear end cover plate have the same structure and are buckled on two sides of the frame body; the inner side wall surface structures of the two cover plates are the same as the wall surface structure of the frame body; a center magnet on which a plurality of connectors are mounted; the linear springs are arranged in the frame body, one end of each linear spring is connected to the connector of the frame body, the other end of each linear spring is connected to the connector of the central magnet, and the four linear springs are distributed in a crossed symmetrical mode in the frame body and support the central magnet at the center of the space in the frame body.
Description
Technical Field
The invention belongs to the technical field of energy collection, and particularly provides a miniature three-dimensional energy collection device.
Background
Micro-wearable electronic devices have received extensive attention and research in recent years. It has been found in research that the power supply strategy of conventional chemical batteries presents significant drawbacks in the application of such devices, including short battery life, the need for periodic recharging, environmental pollution, and the like. Therefore, along with the lower and lower power consumption of the wearable electronic equipment, the vibration energy generated by the human body is converted into electric energy by adopting the vibration energy acquisition device, so that the power supply of the low-power consumption electronic equipment becomes a focus and a hot spot of research. The vibration energy collector can be divided into a plurality of modes such as piezoelectric energy collection, electrostatic energy collection, electromagnetic energy collection and composite energy collection, wherein the energy collector of the type has fast development and great progress due to the characteristics of simple electromagnetic energy collection structure, large output voltage, convenient manufacture, easy analysis and the like. However, the problems of low acquisition efficiency, less output energy, disappearance of energy output along with vibration stop, lack of sustainability of output and the like still exist at present. Therefore, it is necessary to design a simple miniature wearable capacitive energy harvesting device with high harvesting efficiency and sustainable output.
Disclosure of Invention
In view of the above, the present invention provides a miniature three-dimensional energy harvesting device, comprising a support housing structure, a coil 8, a center magnet 4 and a linear spring 2;
the supporting shell structure comprises a frame body 1 with a rectangular middle part, a front end cover plate 6 and a rear end cover plate 5,
the coil winding device comprises a frame body 1, wherein a wire slot is formed in the outer portion of the frame body and used for arranging wires in series, and a plurality of coil 8 slots are formed in four wall surfaces in the frame body 1 and used for placing coils 8; the frame body 1 is provided with a connector 3;
the front end cover plate 6 and the rear end cover plate 5 have the same structure and are buckled on the two sides of the frame body 1; the inner side wall surface structures of the two cover plates are the same as the wall surface structure of the frame body 1;
a center magnet 4 on which a plurality of connectors 3 are mounted; the four linear springs 2 are arranged, one end of each linear spring 2 is connected to the connector 3 of the frame body 1, the other end of each linear spring is connected to the connector 3 on the central magnet 4, the four linear springs 2 are distributed in a cross symmetry mode inside the frame body 1, and the central magnet 4 is supported at the center of the space in the frame body 1;
the coils (8) of all the wall surfaces are wound in the corresponding coil grooves, two ends of the coils are led out of two small holes reserved in the coil grooves and led into a serial wire groove outside the supporting shell, then the positive ends and the positive ends of the coils led out respectively from six surfaces are connected in series in the serial wire groove outside the supporting shell, the negative ends and the negative ends are connected in series, finally the two positive and negative ends after being connected in series are fixed at positive and negative pole identification positions arranged on a front end cover plate (6), and the positive and negative pole connectors are connected with an external circuit or electric equipment when the electric equipment is used.
Further, two springs are installed in a group of obliquely corresponding mode; in the same group, the upper end of one linear spring 2 is fixed on a connector 3 at one corner of the upper part of the middle frame body 1, then the lower end of the group of linear springs 2 corresponding to the inclination is fixed on the connector 3 at the corner corresponding to the inclined lower part of the fixed corner of the group of linear springs 2, the same group of linear springs 2 correspond to the installation position of the central magnet 4 in an inclined manner from top to bottom, and the two groups of springs enable the central magnet 4 to be positioned at the center through the two-to-two inclined stretching.
Further, booster magnet mounting grooves are respectively formed in the centers of the four wall surfaces of the frame body 1 and the inner wall surfaces of the front end cover plate 5 and the rear end cover plate 5, and a plurality of coil 8 grooves on each wall surface are arranged in parallel with each other by taking the magnet mounting grooves as the centers; and the booster magnet is arranged in the booster magnet mounting groove, and the height of the booster magnet is smaller than the depth of the booster magnet mounting groove.
Further, the number of the connectors 3 is matched with the number of the linear springs 2.
According to the invention, the four spring vibrator structures which are arranged in an up-down crossing way provide support for the center magnet 4, so that the center magnet 4 can vibrate freely inside; and 6 booster magnets are arranged around the central magnet 4, no matter which direction the central magnet is subjected to, the vibration is attracted by the booster magnets and amplified due to the change of the distance; meanwhile, even if external vibration excitation stops, the internal center magnet 4 can continuously vibrate due to inertia and mutual coupling of the booster magnet and the spring vibrator structure, so that output sustainability is ensured; and be provided with 6 coil 8 regions of establishing ties all around for after the central magnet 4 position changes arouses the magnetic flux change of all coils 8, and produces induced current because electromagnetic induction, and produces induced electromotive force at coil both ends, and the mutual series connection of positive negative pole through 6 face induction coils is final gathers induced electromotive force to a pair of positive negative pole port, thereby realizes efficient vibration energy collection and electric energy conversion output.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic diagram of an exploded construction of the present invention;
FIG. 3 is a schematic diagram of the structure of an internal crossed spring vibrator;
FIG. 4 is a schematic view of a planar front view structure of the present invention;
FIG. 5 is a schematic view of the B-B structure of FIG. 4;
FIG. 6 is a schematic view of the structure A-A of FIG. 4;
the device comprises a frame body 1, a linear spring 2, a connector 3, a center magnet 4, a rear end cover plate 5, a front end cover plate 6, a booster magnet groove 7 and a coil 8.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1-6, the invention provides a miniature three-dimensional energy acquisition device based on a magnetic-assisted cross spring oscillator structure, which comprises a support shell structure, a coil 8, a center magnet 4 and a linear spring 2;
the supporting shell structure comprises a frame body 1 with a rectangular middle part, a front end cover plate 6 and a rear end cover plate 5,
the wire slot is arranged outside the frame body 1 and used for arranging the wires in series, a plurality of coil 8 slots are respectively arranged on four wall surfaces inside the frame body 1 and used for placing the coils 8, and the connector 3 is arranged on the frame body 1;
the front end cover plate 6 and the rear end cover plate 5 have the same structure and are buckled on the two sides of the frame body 1; the inner side wall structures of the two cover plates are the same as the wall structure of the frame body 1. The rear end cap plate 5 is also provided with a coil 8 slot and a booster magnet slot 7, and is provided with a wire slot on the outside for connecting the coils 8 in series. The front end cover plate 6 is similar to the rear end cover plate 5, but positive and negative electrode indications are arranged on the outer side, the positive and negative electrodes of the coil 8 of the whole device are mutually connected in series and then led out at the positive and negative electrode indication position of the front end cover plate 6 for connecting electric equipment through external wires.
A center magnet 4 on which a plurality of connectors 3 are mounted; the four linear springs 2 are arranged, one end of each linear spring 2 is connected to the connector 3 of the frame body 1, the other end of each linear spring is connected to the connector 3 on the central magnet 4, the four linear springs 2 are distributed in a cross symmetry mode inside the frame body 1, and the central magnet 4 is supported at the center of the space in the frame body 1; . The linear spring 2 and the connector 3 are kept at the middle part of the middle frame when the linear spring is static, so that the linear spring is used for sensing external vibration and changing the magnetic flux of the peripheral coil 8 through displacement, and electromagnetic induction is generated.
The positive electrode joint of the coils 8 of all the wall surfaces is connected to one end of a wire, the negative electrode joint is connected to the other end of the wire, and the wire is connected with electric equipment.
As an improvement of the scheme, the four springs are installed in a group of obliquely corresponding manner; in the same group, the upper end of one linear spring 2 is fixed on a connector 3 at one corner of the upper part of the middle frame body 1, then the lower end of the group of linear springs 2 corresponding to the inclination is fixed on the connector 3 at the corner corresponding to the inclined lower part of the fixed corner of the group of linear springs 2, the same group of linear springs 2 correspond to the installation position of the central magnet 4 in an inclined manner from top to bottom, and the two groups of springs enable the central magnet 4 to be positioned at the center through the two-to-two inclined stretching. The spring crossed inclined arrangement has the advantages that the rigidity of the central magnet in all directions is guaranteed to be the same while the central magnet can move in any direction, the movement regularity of the central magnet is improved, and the current output stability is further improved. Meanwhile, the spring which is obliquely arranged can ensure that the spring stretches radially when the central magnet moves, and excessive bending deformation cannot occur.
As an improvement of the scheme, booster magnet mounting grooves are respectively arranged at the centers of the four wall surfaces of the frame body 1 and the inner wall surfaces of the front end cover plate 5 and the rear end cover plate 5, and a plurality of coil 8 grooves on each wall surface are mutually parallel with the magnet mounting grooves as the center; a booster magnet is arranged in the booster magnet mounting groove, and vibration is amplified and prolonged under the comprehensive influence of the spring vibrator and the magnetic booster structure; the height of the booster magnet is smaller than the depth of the booster magnet mounting groove, and the center magnet 4 is prevented from being contacted with the booster magnet in the swinging process.
As an improvement of the scheme, the number of the connectors 3 is matched with the number of the linear springs 2, and two ends of each linear spring 2 are mounted on the connectors 3.
The miniature three-dimensional energy acquisition device provided by the invention has the advantages that the central magnet is mainly subjected to combined action of self gravity, spring force, magnetic force of the booster magnet, inertial force generated by external vibration excitation and the like in the working process.
Let the spring force be F k Then:
F k ＝-kx
where k is the spring rate and x is the amount of deflection. When the system is excited by external vibration, the position of the central magnet changes, resulting in the extension or compression of the spring, and the displacement of the central magnet contains delta x ，δ y ，δ z The deformation of the spring is satisfied by three directional components, taking the x directional component as an example:
wherein θ is the spring angle.
Assuming that the resultant force of attraction between the booster magnet and the center magnet is F d Taking the z-axis direction as an example, if the center magnet is displaced in the z-axis direction by delta z The formula according to the attraction force of the magnet is:
where k is a constant, m 0 For the magnetic moment of the central magnet, m 1 、m 2 The magnetic moment of each booster magnet in the z-axis direction (the displacement in the x-axis direction and the y-axis direction are the same)。
Let the gravity of the central magnet be F G And introduces the inertial force of the central magnet induced by external vibration excitation as F g And F g The method meets the following conditions:
F g ＝-ma
where m is the center magnet mass and a is the inertial acceleration.
In summary, the system satisfies at any time:
potential energy in the miniature three-dimensional energy acquisition device is calculated, the self gravity of the center magnet and the magnetic force and linear spring force of the surrounding booster magnets are considered, and a potential energy function can be expressed as:
after the coil 8 is shaped, the coil 8 is fixed in the coil 8 grooves of the middle frame and the front and rear end cover plates 5 by means of double-sided adhesive tape and the like, and two ends of the coil 8 extend out of the reserved holes of the coil 8 grooves; then fixing 6 booster magnets in the booster magnet mounting grooves of the middle frame and the front and rear ends by means of glue and the like, and ensuring that the surfaces of the booster magnets are lower than the edges of the grooves; then, the connectors 3 are respectively and crossly fixed on the middle frame reserved groove and the center magnet 4 one by one; then the center magnet 4 is placed at the center part of the middle frame by using the linear spring 2, and the springs are installed according to the sequence of first and then second, so that the uniformity and symmetry of the overall stress of the springs are ensured in the placing process; and finally, fixing the front cover plate and the rear cover plate at two ends of the middle frame, connecting two ends of the coil 8 extending out of the outer side wire slot in series by utilizing copper wires, and finally outputting the coil at the positive and negative indication positions outside the front end. When vibration excitation occurs outside, the central magnet 4 can generate vibration and displacement relative to a central point due to self inertia, and amplify and prolong the vibration under the comprehensive influence of the spring vibrator and the magnetic assistance structure, when the central magnet 4 vibrates, the magnetic flux passing through the peripheral coil 8 can change, and current is generated due to the law of electromagnetic induction, and is output to an external power original along a wire in an outer wire slot, so that the effect of collecting vibration and converting the vibration into electric energy output is achieved.
In a specific test, the central magnet and the booster magnet are both N52 neodymium magnets, the induction coil adopts a 0.2mm direct welding type enamelled copper wire, the frame body structure is manufactured by photo-curing 3D printing, the spring material is a stainless steel spring (the stainless steel spring is weaker than the spring steel material and has smaller magnetic influence with the magnets), the total mass is 34.181g after manufacturing and assembling is completed, at least 30mv of effective voltage can be generated through unidirectional natural shaking of an arm (namely, natural shaking of the arm when a person walks), and the device can be applied to power supply of microelectronic sensor equipment and the like through an external rectifying circuit.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. A miniature three-dimensional energy acquisition device is characterized in that: comprises a supporting shell structure, a coil (8), a central magnet (4) and a linear spring (2);
the supporting shell structure comprises a frame body (1) with a rectangular middle part, a front end cover plate (6) and a rear end cover plate (5),
the coil winding device comprises a frame body (1), wherein a wire slot is formed in the outer portion of the frame body and used for arranging wires in series, and a plurality of coil (8) slots are formed in four wall surfaces of the inner portion of the frame body (1) and used for placing coils (8); the frame body (1) is provided with a connector (3);
the front end cover plate (6) and the rear end cover plate (5) have the same structure and are buckled on the two sides of the frame body (1); the inner side wall surface structures of the two cover plates are the same as the wall surface structure of the frame body (1);
a center magnet (4) on which a plurality of connectors (3) are mounted; the four linear springs (2) are arranged, one end of each linear spring is connected to the connector (3) of the frame body (1), the other end of each linear spring is connected to the connector (3) on the central magnet (4), the four linear springs (2) are distributed in a cross symmetry mode in the frame body (1), and the central magnet (4) is supported at the center of the inner space of the frame body (1);
the coils (8) of all the wall surfaces are wound in the corresponding coil grooves, two ends of the coils are led out of two small holes reserved in the coil grooves and led into a serial wire groove outside the supporting shell, then the positive ends and the positive ends of the coils led out respectively from six surfaces are connected in series in the serial wire groove outside the supporting shell, the negative ends and the negative ends are connected in series, finally the two positive and negative ends after being connected in series are fixed at positive and negative pole identification positions arranged on a front end cover plate (6), and the positive and negative pole connectors are connected with an external circuit or electric equipment when the electric equipment is used.
2. A miniature three-dimensional energy harvesting device as defined by claim 1, wherein: the four springs are installed in a group of obliquely corresponding mode; in the same group, the upper end of one linear spring (2) is fixed on a connector (3) at one corner of the upper part of the middle frame body (1), then the lower end of the group of corresponding linear springs (2) is fixed on the connector (3) at the lower corner of the fixed corner of the same group of linear springs (2), the installation positions of the same group of linear springs (2) on the central magnet (4) are corresponding to one upper corner and one lower corner, and the two groups of springs enable the central magnet (4) to be positioned at the center through two-to-two oblique stretching.
3. A miniature three-dimensional energy harvesting device as defined by claim 1, wherein: the center of the inner wall surfaces of the four wall surfaces of the frame body (1) and the front and rear end cover plates (5) is respectively provided with a booster magnet mounting groove, and a plurality of coil (8) grooves on each wall surface are mutually parallel with each other by taking the magnet mounting groove as the center; the booster magnet is installed in the booster magnet installation groove, and the height of the booster magnet is smaller than the depth of the booster magnet installation groove so as to prevent the center magnet from being in direct contact with the booster magnet during movement.
4. A miniature three-dimensional energy harvesting device as defined by claim 1, wherein: the number of connectors (3) is matched with the number of linear springs (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310712302.0A CN116683724A (en) | 2023-06-16 | 2023-06-16 | Miniature three-dimensional energy acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310712302.0A CN116683724A (en) | 2023-06-16 | 2023-06-16 | Miniature three-dimensional energy acquisition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116683724A true CN116683724A (en) | 2023-09-01 |
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ID=87787066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310712302.0A Pending CN116683724A (en) | 2023-06-16 | 2023-06-16 | Miniature three-dimensional energy acquisition device |
Country Status (1)
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|---|---|
| CN (1) | CN116683724A (en) |
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2023
- 2023-06-16 CN CN202310712302.0A patent/CN116683724A/en active Pending
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