CN113922622A - Low-frequency vibration energy collecting device - Google Patents
Low-frequency vibration energy collecting device Download PDFInfo
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- CN113922622A CN113922622A CN202111287044.3A CN202111287044A CN113922622A CN 113922622 A CN113922622 A CN 113922622A CN 202111287044 A CN202111287044 A CN 202111287044A CN 113922622 A CN113922622 A CN 113922622A
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- frequency vibration
- vibration energy
- permanent magnet
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- rigid rods
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/04—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving coil systems and stationary magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention discloses a low-frequency vibration energy collecting device. The device comprises a mechanical main body structure, an elastic element, a micro-coil structure and a permanent magnet structure. The main structure of the machine has six side surfaces, including four side surfaces formed by rigid rods and upper and lower bottom surfaces formed by two cover plates. The four side surfaces are composed of eight L-shaped rigid rods, and every two rigid rods are connected and fixed through hinges. The cover plates on the upper and lower bottom surfaces are fixed at the right angle position of the L-shaped rod in a hinged connection mode. The mechanical main body structure comprises a long spring connected between the hinged middle parts of two opposite side L-shaped rigid rods, and two short sides of the two pairs of rigid rods on the upper and lower sides are respectively connected with a short spring; the three springs are in parallel position. The micro-coil structure and the permanent magnet structure comprise a permanent magnet arranged on a top cover plate, and a coil arranged on a bottom cover plate. The invention can collect the energy generated during low-frequency vibration, and simultaneously improves the acquisition efficiency of the low-frequency vibration energy due to the quasi-zero rigidity characteristic of the device.
Description
Technical Field
The invention relates to an energy collecting device, in particular to a low-frequency vibration energy collecting device.
Background
With the development of sensor networks, the sensor networks are applied to various scenes, and the traditional battery has the defects of short service life, environmental pollution, limited energy and the like. Many of the mechanical vibrations encountered in our daily lives are in the low frequency domain. For example, humans walk at a frequency of about 2 Hz, and vehicles travel on normal roads at 0.5-25 Hz. People need to find a novel power supply mode which can continuously generate power, has long service life and is more environment-friendly, and the energy collection technology utilizing low-frequency vibration is concerned by people because the energy collection technology meets the characteristics.
Disclosure of Invention
The invention provides a low-frequency vibration energy collecting device based on a quasi-zero stiffness structure, aiming at overcoming the defects of the prior art, and the low-frequency vibration energy collecting device can convert external low-frequency vibration into electric energy to supply power for subsequent low-power consumption equipment.
For the purpose of the invention, the technical scheme adopted by the invention is as follows:
the permanent magnet motor comprises a mechanical main body structure, an elastic element, a micro-coil structure and a permanent magnet structure, wherein the elastic element and the micro-coil structure are positioned in the mechanical main body structure.
The main structure of the machine is a hexahedron and comprises four side surfaces formed by rigid rods and upper and lower bottom surfaces formed by two cover plates, wherein the four side surfaces are formed by eight L-shaped rigid rods, and every two rigid rods are hinged through a pivot point. The cover plates on the upper and lower bottom surfaces are connected with the right angle of the L-shaped rod through pivot points and are hinged.
The elastic element in the main mechanical structure comprises a long spring connected between the hinged two L-shaped rigid rods, a short spring connected with the short edge of the rigid rod opposite to the upper side surface, and a short spring connected with the short edge of the rigid rod opposite to the lower side surface; the three springs are coplanar and parallel.
The top cover plate is provided with a permanent magnet structure, the bottom cover plate is provided with a micro-coil structure for collecting low-frequency vibration energy, and the device has the characteristic of quasi-zero rigidity and is used for improving the collection efficiency of the low-frequency vibration energy in the environment where the device is located.
The invention has the beneficial effects that: when the device is subjected to low-frequency vibration of not higher than 25HZ in the environment, the reliability of the structure can be ensured; the acquisition efficiency of low-frequency vibration energy in the environment is improved through a quasi-zero stiffness structure; secondly, the designed structure is manufactured by adopting a 3D printing technology without adopting expensive instruments and equipment, so that the manufacturing cost of the device can be reduced, and the process steps are simplified.
Drawings
FIG. 1 is a front three-dimensional view of the present invention.
Fig. 2 is a side three-dimensional view of the present invention.
Fig. 3 is a three-dimensional view of a coil structure of the present invention.
Fig. 4 is a three-dimensional view of the permanent magnet structure of the present invention.
In the figure: 1. the mechanical structure comprises a mechanical main body structure 2, an elastic element 3, a permanent magnet structure 4, a micro-coil structure 5, an L-shaped rigid rod 6, a pivot point 7, a cover plate 8, a long spring 9, a short spring 10, a permanent magnet 11 and a coil.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the device of the present invention includes a mechanical body structure 1, an elastic element 2, a permanent magnet structure 3 and a micro-coil structure 4. The elastic element 2, the permanent magnet structure 3 and the micro-coil structure 4 are located inside the machine body structure 1.
As shown in fig. 2, the machine body structure 1 has six sides, including four sides formed by the rigid rods 5 and upper and lower bottom surfaces formed by the two cover plates 7. The four sides are formed by eight L-shaped rigid rods 5, each two rigid rods 5 being fixed by a hinged connection via a pivot point 6. The same cover plates 7 on the upper and lower bottom surfaces are fixed at the right angle of the L-shaped rod through hinged connection.
The elastic element 2 in the main machine body structure 1 comprises a long spring 8 arranged between two pairs of opposite L-shaped rigid rods 5, and short sides of the rigid rods 5 on the upper side and the lower side are respectively connected with a short spring 9; the three springs are positioned parallel to each other.
The spring used for the elastic element 2 is from MYSUMI-VONA, the long spring 8 is UFSP12-1.2-90, and the short spring 9 is WFSP 9-1.2-30.
As shown in fig. 3 and 4, the permanent magnet structure 3 and the micro-coil structure 4 include a permanent magnet 10 and a coil 11, the coil 11 is installed on the top cover plate, and the permanent magnet 10 is installed on the bottom cover plate right below.
The length of the long side of the L-shaped rigid rod 5 in the device is 0.09-0.15 meter, and the length of the short side is 0.03-0.05 meter. The permanent magnet 10 in the permanent magnet structure 3 is made of rare earth permanent magnet NdFe35, the radius of the permanent magnet is 3.8mm, and the height of the permanent magnet is 9 mm. The coil 11 in the micro-coil structure 4 is a copper wire with a radius of 1.7 mm.
The machine body structure 1 in the device is a frame having the external shape of a hexahedron. The mechanical body structure 1 of the device is manufactured by a 3D printing process and uses stainless steel rods as hinges to connect the elements. The device has the characteristic of quasi-zero stiffness.
At zero load, the device has large static stiffness (bearing stiffness) to ensure high bearing capacity and small static displacement, and when the load compression device is in a static balance position, the dynamic stiffness of the device is greatly reduced, so that the device has both high bearing capacity and low natural frequency. This is a quasi-zero stiffness characteristic. The quasi-zero stiffness structure of the device is composed of a mechanical main body structure, a negative stiffness structure (long spring) and a positive stiffness structure (short spring). At zero load, the device has large static stiffness (bearing stiffness) to ensure high bearing capacity and small static displacement, when the load compresses the device to a static balance position, the long spring is pulled, the short spring is compressed, and the dynamic stiffness of the device is greatly reduced, so that the device has both high bearing capacity and low natural frequency. The effective load of the device is coupled with the system, and the effective load should vibrate in an ultra-low frequency band below 25 Hz.
The working principle of the invention is as follows: when the device is subjected to vibration in the environment, the micro-coil structure 3 can generate forced vibration, because the device has the characteristic of quasi-zero rigidity, the displacement of the permanent magnet 10 can be almost ignored, namely, the coil 11 vibrates up and down relative to the permanent magnet 10, so that the magnetic flux in the coil 11 changes, and according to the Faraday's law of electromagnetic induction, induced current and induced electromotive force can be generated in the coil 11. The spring element 2 of the present invention has a low spring constant and the coil 11 is less air damped when vibrating, thus allowing the coil 11 to displace significantly when vibrating. In addition, the main body of the invention is formed by 3D printing, so that the coil 11 can obtain large displacement by vibration in the environment with the external low-frequency vibration frequency close to 25Hz, and the low-frequency vibration energy in the environment can be efficiently collected.
Claims (4)
1. A low frequency vibration energy harvesting device characterized by: the permanent magnet synchronous motor comprises a mechanical main body structure, an elastic element, a micro-coil structure and a permanent magnet structure, wherein the elastic element and the micro-coil structure are positioned in the mechanical main body structure;
the mechanical main body structure is a hexahedron and comprises four side surfaces formed by rigid rods and upper and lower bottom surfaces formed by two cover plates, wherein the four side surfaces are formed by eight L-shaped rigid rods, and each two rigid rods are hinged through a pivot point; the cover plates on the upper and lower bottom surfaces are connected with the right angle of the L-shaped rod through pivot points and are hinged;
the elastic element in the main mechanical structure comprises a long spring connected between the hinged two L-shaped rigid rods, a short spring connected with the short edge of the rigid rod opposite to the upper side surface, and a short spring connected with the short edge of the rigid rod opposite to the lower side surface; the three springs are coplanar and parallel;
the top cover plate is provided with a permanent magnet structure, the bottom cover plate is provided with a micro-coil structure for collecting low-frequency vibration energy, and the device has the characteristic of quasi-zero rigidity and is used for improving the collection efficiency of the low-frequency vibration energy in the environment where the device is located.
2. A low frequency vibration energy harvesting apparatus according to claim 1 wherein: the mechanical main body structure is manufactured by adopting a 3D printing process, and a stainless steel rod is used for hinged connection.
3. A low frequency vibration energy harvesting apparatus according to claim 1 wherein: the length of the long side of the L-shaped rigid rod is 0.09-0.15 meter, and the length of the short side of the L-shaped rigid rod is 0.03-0.05 meter.
4. A low frequency vibration energy harvesting apparatus according to claim 1 wherein: the spring used by the elastic element is from MYSUMI-VONA, wherein the long spring is in a negative stiffness structure and is in a UFSP12-1.2-90 model, and the short spring is in a positive stiffness structure and is in a WFSP9-1.2-30 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111287044.3A CN113922622A (en) | 2021-11-02 | 2021-11-02 | Low-frequency vibration energy collecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111287044.3A CN113922622A (en) | 2021-11-02 | 2021-11-02 | Low-frequency vibration energy collecting device |
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| Publication Number | Publication Date |
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| CN113922622A true CN113922622A (en) | 2022-01-11 |
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| CN202111287044.3A Pending CN113922622A (en) | 2021-11-02 | 2021-11-02 | Low-frequency vibration energy collecting device |
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Citations (12)
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|---|---|---|---|---|
| GB664941A (en) * | 1949-04-16 | 1952-01-16 | Lockers Engineers Ltd | Improvements in and relating to a vibratory motor |
| CN101141093A (en) * | 2007-10-11 | 2008-03-12 | 上海交通大学 | Minisize electromagnetic low-frequency vibration energy collecting device |
| RU2463497C1 (en) * | 2011-05-20 | 2012-10-10 | Государственное образовательное учреждение высшего профессионального образования "Уфимский государственный нефтяной технический университет" | Bumper with quasi-zero stiffness |
| CN106402267A (en) * | 2016-05-23 | 2017-02-15 | 福州大学 | Extension type quasi-zero stiffness vibration isolator and implementation method thereof |
| US9920793B1 (en) * | 2013-12-06 | 2018-03-20 | Hrl Laboratories, Llc | Negative stiffness system with variable preload adjustment |
| CN108155774A (en) * | 2018-01-17 | 2018-06-12 | 北京林业大学 | A kind of tunable energy gathering apparatus |
| CN108533653A (en) * | 2018-04-26 | 2018-09-14 | 合肥工业大学 | It is a kind of that novel negative stiffness structure that stablizing negative stiffness value can be provided |
| CN110365249A (en) * | 2019-07-15 | 2019-10-22 | 上海大学 | Based on the quasi- zero stiffness vibration isolation of Stewart platform and energy collecting system |
| CN111911576A (en) * | 2020-09-09 | 2020-11-10 | 吉林大学 | Quasi-zero stiffness vibration isolator with cantilever leaf springs |
| CN111927912A (en) * | 2020-07-15 | 2020-11-13 | 江苏大学 | Quasi-zero rigidity vertical vibration isolator capable of realizing balance position adjustment |
| WO2020264146A1 (en) * | 2019-06-25 | 2020-12-30 | Arizona Board Of Regents On Behalf Of Arizona State University | Mechanical metamaterials as an energy shield |
| CN113357308A (en) * | 2021-07-14 | 2021-09-07 | 吉林大学 | High-efficient low frequency vibration isolation device |
-
2021
- 2021-11-02 CN CN202111287044.3A patent/CN113922622A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB664941A (en) * | 1949-04-16 | 1952-01-16 | Lockers Engineers Ltd | Improvements in and relating to a vibratory motor |
| CN101141093A (en) * | 2007-10-11 | 2008-03-12 | 上海交通大学 | Minisize electromagnetic low-frequency vibration energy collecting device |
| RU2463497C1 (en) * | 2011-05-20 | 2012-10-10 | Государственное образовательное учреждение высшего профессионального образования "Уфимский государственный нефтяной технический университет" | Bumper with quasi-zero stiffness |
| US9920793B1 (en) * | 2013-12-06 | 2018-03-20 | Hrl Laboratories, Llc | Negative stiffness system with variable preload adjustment |
| CN106402267A (en) * | 2016-05-23 | 2017-02-15 | 福州大学 | Extension type quasi-zero stiffness vibration isolator and implementation method thereof |
| CN108155774A (en) * | 2018-01-17 | 2018-06-12 | 北京林业大学 | A kind of tunable energy gathering apparatus |
| CN108533653A (en) * | 2018-04-26 | 2018-09-14 | 合肥工业大学 | It is a kind of that novel negative stiffness structure that stablizing negative stiffness value can be provided |
| WO2020264146A1 (en) * | 2019-06-25 | 2020-12-30 | Arizona Board Of Regents On Behalf Of Arizona State University | Mechanical metamaterials as an energy shield |
| CN110365249A (en) * | 2019-07-15 | 2019-10-22 | 上海大学 | Based on the quasi- zero stiffness vibration isolation of Stewart platform and energy collecting system |
| CN111927912A (en) * | 2020-07-15 | 2020-11-13 | 江苏大学 | Quasi-zero rigidity vertical vibration isolator capable of realizing balance position adjustment |
| CN111911576A (en) * | 2020-09-09 | 2020-11-10 | 吉林大学 | Quasi-zero stiffness vibration isolator with cantilever leaf springs |
| CN113357308A (en) * | 2021-07-14 | 2021-09-07 | 吉林大学 | High-efficient low frequency vibration isolation device |
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