CN106533113A - Collision-based broadband low-frequency electromagnetic type vibration energy collector - Google Patents
Collision-based broadband low-frequency electromagnetic type vibration energy collector Download PDFInfo
- Publication number
- CN106533113A CN106533113A CN201611082425.7A CN201611082425A CN106533113A CN 106533113 A CN106533113 A CN 106533113A CN 201611082425 A CN201611082425 A CN 201611082425A CN 106533113 A CN106533113 A CN 106533113A
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- China
- Prior art keywords
- harvester
- coil
- vibration energy
- magnet
- spring
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Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
Abstract
The invention discloses a collision-based broadband low-frequency electromagnetic type vibration energy collector. The vibration energy collector mainly consists of a base, rolling wheels, a magnet bracket, springs, magnets, a coil bracket, a coil, a right baffle, a left baffle and a top cover, wherein the rolling wheels are placed in a sliding groove of the base of an outer framework (which consists of the base, the coil bracket, the coil, the right baffle, the left baffle and the top cover); an inner framework (which is consists of the magnet bracket, the springs and the magnets) is placed on the rolling wheels; and an initial spacing is formed between the free ends of the springs in the inner framework and the left baffle of the outer framework, and between the free ends of the springs in the inner framework and the right baffle of the outer framework. In environment vibration in a horizontal direction, relative movement between the inner framework and the outer framework can be generated by the rolling of the rolling wheels, which causes relative movement between the magnets and the coil so as to generate induced electromotive force to supply power for a load. The collector provided by the invention can perform efficient collection of weak low-frequency and broadband vibration energy from an environment, so that the collector has wide application prospect in the wireless sensing and other fields.
Description
Technical field
The invention belongs to wireless sensor network and field of renewable energy, are related specifically to a kind of broadband based on collision
Low-frequency electrical magnetic-type vibrational energy harvester structure.
Background technology
With the development of the technologies such as integrated circuit, micro-system, wireless telecommunications, combine embedded technology, sensor technology,
The wireless sensor network of wireless communication technology to human lives' mode of production produce significant impact, its military affairs, environment,
Medical treatment, family and other commercial kitchen areas have broad application prospects.However, most of radio sensing network nodes still make
Powered with conventional batteries, when during particularly condition is than relatively rugged environment in the wild when inserting knot, the periodic replacement battery to be
Hardly possible.So, limited battery electric quantity just decides Network morals, this greatly limits wireless sensing
The application of device network.For this purpose, by wireless sensor node is arranged the kinetic energy (vibrational energy, wind energy, the stream that are widely present in scene
Water kinetic energy etc.) electric energy is converted to, so as to realize the self energizing of node, it is that the one kind for solving the problems, such as wireless sensor node energy supply has
Efficacious prescriptions method, progressively becomes the focus of domestic and international micro- energy research.
Vibrational energy is widely present in natural environment, both at home and abroad to ambient vibration can be converted to the micro-vibration energy of electric energy
Harvester has carried out system in-depth study.Typical vibrational energy acquisition system is mostly based on resonance mechanism, and its typical structure is
One spring mass block system, only when environmental vibration frequency is matched with the natural frequency of collector systems, acquisition system is
There is larger output.Once environmental vibration frequency deviates the natural frequency of acquisition system, output is drastically reduced.According to tune
Look into, the vibration of the generation such as human body, automobile, trees and building is the low-frequency vibration of below 50Hz mostly, and while have it is faint,
The features such as bandwidth is big.However, both at home and abroad existing vibrational energy harvester frequency band is narrower, natural frequency is higher, and to faint
The collecting efficiency of vibrational energy is low.In development environment, faint low frequency, the highly efficient collecting method of wide-band vibration energy, miniature to promoting
Vibrational energy harvester in fields such as wireless sensor networks extensively using significant.
The present invention proposes a kind of broad band low frequency electromagnetic vibration energy harvester based on collision, to faint low in environment
Frequently, wide-band vibration can have higher collecting efficiency, can be widely applied to the fields such as wireless sensor network.
The content of the invention
The present invention proposes a kind of broad band low frequency electromagnetic vibration energy harvester based on collision, and the harvester can gather ring
Faint, low frequency, wide-band vibration energy in border.
In order to realize foregoing invention purpose, the present invention takes technical scheme below：
It is a kind of based on collision broad band low frequency electromagnetic vibration energy harvester, its mainly by base, right baffle-plate, right shell body,
Top cover, magnet holder, Magnet, coil brace, coil, roller and spring are constituted, and wherein Magnet is fixed in magnet holder and constitutes
Magnet array, coil are fixed on coil brace and constitute coil array, and one end of spring is fixed in magnet holder, the other end with
There is initial separation between the left baffle of outside framework.
It is connected by screw between base, coil brace, coil, right baffle-plate, right shell body and top cover and constitutes the outer of harvester
Framework；Magnet holder, spring and Magnet constitute the free end of spring and outside framework on inner frame, and inner frame left baffle it
Between have certain free movement stroke；Roller is placed on the base of outside framework as the connection member between outside framework and inner frame
In corresponding chute in inner frame magnet holder, can roll along chute direction.
Under harvester ambient vibration effect in the horizontal direction, the rolling of roller will cause inner frame that phase occurs with outside framework
To motion, cause Magnet relative to coil movement.When inner frame and the relative displacement of outside framework to exceed therebetween it is initial
During spacing, inner frame will collide with outside framework, and the collision process will cause larger energy loss.The present invention is in inner frame
On be provided with spring, the part kinetic energy of inner frame and outside framework can be converted into the elastic potential energy of spring and store before collision
Come, so as to reduce energy loss.Initial separation is provided between the left baffle of the free end and outside framework of the spring of inner frame,
When inner frame moves past the initial separation relative to outside framework, the spring in magnet holder is compressed, outside in inner frame
In the baffle plate approach process of framework, the part kinetic energy of inner frame and outside framework is converted into the elastic potential energy of spring, in inner frame and
In outside framework separation process, in spring, the elastic potential energy of storage changes the phase that inner frame and outside framework will be made to produce another direction
To motion, be amplified the speed of the relative motion of the two, improve the rate of change of magnetic flux, so as to increase induct it is electronic
Gesture.Thus, producing cycle reciprocal relative motion between Magnet and coil, induction electromotive force is produced, so as to by extraneous vibration
Electric energy can be converted to, can be the power supply such as wireless sensor node after subsequent conditioning circuit process.
By introducing roller, the broad band low frequency electromagnetic vibration energy harvester based on collision proposed by the present invention is no longer one
, there are two kinds of different kinestates in the course of the work in individual simple spring-quality system.Do not compress in spring and do not exist
During elastic force, harvester is not a spring mass block system, no natural frequency；When there is elastic force in spring-compressed, harvester
Similar to a spring mass block system, there is natural frequency.As when harvester works, two kinds of kinestates are alternately present,
Therefore there is significant difference with the vibrational energy harvester typically based on resonance mechanism in the behavior of the harvester, when ambient vibration frequency
In an interior change in a big way, harvester has higher energy acquisition efficiency to rate.More specifically it is exactly：The present invention is carried
The broad band low frequency electromagnetic vibration energy harvester based on collision for going out has bigger than conventional resonance type vibration energy harvester
Bandwidth.
Compared to existing technology, the present invention has the advantages that：
1st, the electromagnetic vibration energy harvester based on collision proposed by the present invention reduces frictional force system by introducing roller
About, increase the response that harvester is encouraged to weak vibration；
2nd, it is proposed by the present invention based on collision electromagnetic vibration energy harvester by introduce roller, make harvester it is interior,
Outside framework is easier to relative motion under low-frequency ambient vibrations effect, improves the collecting efficiency to low-frequency vibration energy；
3rd, the electromagnetic vibration energy harvester based on collision proposed by the present invention reduces internal and external frames by introducing spring
Energy loss caused by frame collision institute, so that improve energy acquisition efficiency；
4th, the electromagnetic vibration energy harvester based on collision proposed by the present invention, by the direction of motion arrange northern (N) pole,
The Distribution of Magnetic Field of southern (S) pole alternate, when moving relative to magnet array in ambient vibration effect lower coil array, passes through
The direction upset that the magnetic flux of coil occurred within a period of motion, produces bigger magnetic flux change, so as to increase collection
The output of device；
5th, the electromagnetic vibration energy harvester based on collision proposed by the present invention makes harvester by introducing roller and spring
Different from conventional resonance type vibration energy harvester, with larger bandwidth；
6th, it is proposed by the present invention based on collision electromagnetic vibration energy harvester have simple structure, it is easy to carry, low into
This and can mass production the advantages of, have broad application prospects in fields such as wireless sensor networks.
Description of the drawings
Fig. 1 is the structural representation of the electromagnetic vibration energy harvester based on collision；
Fig. 2 is coil array and its support bracket fastened structural representation；
Fig. 3 is the schematic diagram of Magnet, coil array and magnetic induction line direction；
Fig. 4 is the structural representation of harvester outside framework；
Fig. 5 is the structural representation of harvester inner frame.
Specific embodiment
Describe the present invention with reference to the accompanying drawings and detailed description.
As shown in figure 1, a kind of broad band low frequency electromagnetic vibration energy harvester based on collision, which is mainly by base 1, roller
2nd, magnet holder 3, spring 4, Magnet 5, coil brace 6, coil 7, right shell body 8, right baffle-plate 9 and top cover 10 are (for complete describer
Part internal structure, top cover are not closed) constitute, wherein Magnet 5 is fixed in magnet holder 3 and constitutes magnet array, and coil 7 is fixed on
Coil array is constituted on coil brace 6,4 one end of spring is fixed in magnet holder 3, the other end is freely hanging.As shown in figure 4,
The outside framework of the harvester be connected by screw by base 1, coil brace 6, coil 7, right shell body 8, right baffle-plate 9 and top cover 10 and
Into；As shown in figure 5, the inner frame of harvester is made up of magnet holder 3, spring 4 and Magnet 5, and the freedom of the spring 4 of inner frame
There is initial separation between end and the left baffle of outside framework；Outside framework is connected by roller 2 with inner frame, the base 1 of outside framework
With have in the magnet holder 3 of inner frame for roller 2 motion chute；As shown in figure 3, the harvester totally three row Magnet and two row
Coil, arranges two alignment circles, and the initial separation between single Magnet 5, the size of coil 7 and internal and external frame is big between three row Magnet
Cause identical, the adjacent magnets polarity in same row all press northern (N), south (S) and is alternately arranged, and coil both sides just to Magnet pole
Property conversely, arranging the Distribution of Magnetic Field of northern (N) pole, south (S) pole alternate in the direction of motion.
The environment kinetic energy harvester is placed in when generating electricity in environment, under ambient vibration effect in the horizontal direction, due to
Connected using roller 2 between outside framework and inner frame, be difficult to keep balance under external vibration, the rolling of roller 2 will cause outer
There is relative motion between framework and inner frame, when inner frame exceedes the spring 4 of inner frame relative to outside framework move distance
During initial separation between free end and the left baffle of outside framework, the spring 4 in magnet holder 3 is compressed, inner frame to
In the baffle plate approach process of outside framework, the part kinetic energy of inner frame and outside framework is converted into the elastic potential energy of spring 4, in inner frame
In outside framework separation process, the elastic potential energy conversion of storage in spring 4 will make inner frame and outside framework produce another direction
Relative motion, be amplified the speed of the relative motion of the two, improve the rate of change of magnetic flux, induct so as to increase
Electromotive force.Thus, producing cycle reciprocal relative motion between Magnet 5 and coil 7, induction electromotive force is produced, so as to by the external world
Vibrational energy be converted to electric energy, can be the power supply such as wireless sensor node after subsequent conditioning circuit process.
As the above analysis, by the Distribution of Magnetic Field in northern (N) pole of direction of motion setting, south (S) pole alternate, when
When ambient vibration effect lower coil array is moved relative to magnet array, by the magnetic flux of coil within the period of motion
The direction upset of generation, produces bigger magnetic flux change, so as to increase the output of harvester；By introduce roller 2 (or other
Rolling element) so that harvester when by low frequency, faint vibrational excitation can just produce higher output and be wireless sensing section
Point power supply；By introducing spring 4 (or other elastomers), the energy loss in inside and outside collision process is reduced, so as to improve collection
The energy acquisition efficiency of device；By introducing roller 2 and spring 4, harvester is enable to be different from conventional resonance type vibration harvester,
With larger bandwidth.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent (such as realizing vibrational energy to the conversion etc. of electric energy using piezoelectric effect or electrostatic principle),
Without deviating from the objective and scope of the technical program, which all should be covered in the middle of scope of the presently claimed invention.
Claims (6)
1. a kind of based on the broad band low frequency electromagnetic vibration energy harvester for colliding, which is mainly by base, right baffle-plate, right shell body, top
Lid, magnet holder, Magnet, coil brace, coil, roller and spring are constituted；Wherein Magnet is fixed in magnet holder and constitutes magnetic
Ferrum array, coil are fixed on coil brace and constitute coil array, and one end of spring is fixed in magnet holder.In institute of the present invention
In the structure of proposition, base, coil brace, coil, right baffle-plate, right shell body, top cover are connected by screw and constitute the outer of harvester
Framework；Magnet holder, spring and Magnet constitute inner frame, and the left baffle of the free end of the spring of inner frame and outside framework it
Between have certain initial separation；Roller is placed on the base and inside casing of outside framework as the connection member between outside framework and inner frame
In the magnet holder of frame in corresponding chute, roll along chute direction.
2. as claimed in claim 1 based on the electromagnetic vibration energy harvester for colliding, it is characterised in that：Electromagnetic energy is gathered
Device reduces the constraint between inter and outer gimbal by introducing roller, makes inner frame be easier to phase under ambient vibration effect
For the motion of outside framework, collecting efficiency of the harvester to weak vibration energy in environment is improve.
3. as claimed in claim 1 based on the electromagnetic vibration energy harvester for colliding, it is characterised in that：By introducing roller,
Make the inter and outer gimbal of harvester be easier to relative motion under low-frequency ambient vibrations effect, improve to low-frequency vibration energy
Collecting efficiency.
4. as claimed in claim 1 based on the electromagnetic vibration energy harvester for colliding, it is characterised in that：By introducing spring,
The energy loss in inter and outer gimbal collision process is reduced, so as to improve the energy acquisition efficiency of harvester.
5. as claimed in claim 1 based on the electromagnetic vibration energy harvester for colliding, it is characterised in that：By introduce roller and
Spring, enables harvester to be different from conventional resonance type vibration harvester, with larger bandwidth.
6. as claimed in claim 1 based on the electromagnetic vibration energy harvester for colliding, it is characterised in that：By in the direction of motion
Northern (N) pole, the Distribution of Magnetic Field of south (S) pole alternate are set, when acting on lower coil array relative to Magnet battle array in ambient vibration
During row motion, the direction occurred within a period of motion by the magnetic flux of coil overturns, and produces bigger magnetic flux change,
So as to increase the output of harvester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611082425.7A CN106533113A (en) | 2016-11-30 | 2016-11-30 | Collision-based broadband low-frequency electromagnetic type vibration energy collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611082425.7A CN106533113A (en) | 2016-11-30 | 2016-11-30 | Collision-based broadband low-frequency electromagnetic type vibration energy collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106533113A true CN106533113A (en) | 2017-03-22 |
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ID=58355321
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611082425.7A Pending CN106533113A (en) | 2016-11-30 | 2016-11-30 | Collision-based broadband low-frequency electromagnetic type vibration energy collector |
Country Status (1)
| Country | Link |
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| CN (1) | CN106533113A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112532011A (en) * | 2020-11-24 | 2021-03-19 | 上海大学 | Plane energy collector based on magnetic flux density abrupt change |
| CN112701871A (en) * | 2020-12-31 | 2021-04-23 | 重庆大学 | Microminiature electromagnetic type wind power generation set |
| CN113321026A (en) * | 2021-06-03 | 2021-08-31 | 魏永清 | Non-woven fabrics processing production is with dustproof coiling material device of vibration |
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| CN1877973A (en) * | 2006-06-30 | 2006-12-13 | 深圳市杰特电信控股有限公司 | Vibration generating device for portable electronic apparatus |
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Application publication date: 20170322 |