CN110212731A - Electromagnetic vibration energy collector based on folding cantilever beam of special - Google Patents
Electromagnetic vibration energy collector based on folding cantilever beam of special Download PDFInfo
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- CN110212731A CN110212731A CN201910607253.8A CN201910607253A CN110212731A CN 110212731 A CN110212731 A CN 110212731A CN 201910607253 A CN201910607253 A CN 201910607253A CN 110212731 A CN110212731 A CN 110212731A
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- cantilever beam
- special
- mass block
- folding cantilever
- energy collector
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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
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention belongs to vibrational energy power fields, a kind of electromagnetic vibration energy collector based on folding cantilever beam of special is provided, including pedestal, mass block and folding cantilever beam of special, the both ends of pedestal and the end of folding cantilever beam of special be fixedly connected, several coils are fixedly connected on pedestal through support base, mass block surrounds coil and is fixed under folding cantilever beam of special, and the mass block between adjacent windings is embedded in installation permanent magnet, and permanent magnet, mass block and folding cantilever beam of special collectively form spring-mass block oscillatory system.The present invention has compact-sized, the advantages such as electromechanical conversion efficiency height, the power supply particularly suitable as wireless sensor node.
Description
Technical field
The invention belongs to vibrational energy power field, it is related to the generator with movable magnet and stationary coil system, tool
Body is related to a kind of electromagnetic vibration energy collector based on folding cantilever beam of special.
Background technique
Under the historical background of integrated technology fast development, wireless sensor technology is sent out towards microminaturization, networking
Exhibition is widely used in the equipment course of work, structural health detection etc..Conventional wireless sensor node is driven using battery, is deposited
In limited lifetime, the problem of needing to frequently replace battery, the wireless sensor network numerous in large scale, number of nodes
For network, it is very high to implement the maintenance cost that this application mode needs.In fact, past in the working environment of wireless sensor devices
Toward there are the energy of many forms, such as luminous energy, mechanical energy, electromagnetic energy, the energy that environmental energy can be converted to electric energy is received
Collect device, the autonomy-oriented energy supply of wireless sensor system may be implemented, avoids large-scale application brought by battery power supply and ask
Topic.The fuel engines of power is provided for vehicles such as automobile, ships, its surface can generate certain amplitude and frequency when work
Mechanical oscillation, there are vibration mechanical energy, this energy is collected can drive using and engine structure health monitoring
Etc. microminiature wireless sensor system.
It is distinguished according to energy translative mode, vibrational energy collector mainly includes piezoelectric type, electromagnetic type and electrostatic, wherein
Piezoelectric type vibration energy harvester output impedance is high, voltage is high, needs complicated designing impedance matching；Electrostatic energy harvester
Variable capacitance design is generallyd use, size is smaller, and energy conversion efficiency is very low；Electromagnetic energy collector has suitable impedance
And output voltage, the disadvantage is that design structure is relative complex.Therefore, energy harvester structure is rationally designed for electromagnetic vibration energy
It is very necessary for measuring the large-scale application of collector.
Through retrieving, Chinese patent literature CN104104205A discloses a kind of cantilevered vibration for automotive tyre pressure monitoring
Energy collecting device, including sequentially connected beam type energy acquisition cylindrical unit, charging control circuit, accumulator and power supply
Output circuit, beam type energy acquisition cylindrical unit include cylindrical shell, cantilever beam, permanent magnet, iron core and electromagnetic coil,
The fixing end and iron core of cantilever beam are each attached on cylindrical container, and electromagnetic coil is embedding to be wound on iron core, and permanent magnet is fixed on outstanding
The free end of arm beam, permanent magnet are opposite with plunger position.Cantilever beam when for acquiring tire period rotation in vehicle traveling process
Mass block on periodic vibration caused by the alternation gravity that acts on energy, and since Uneven road generates automobile tire
The energy of random vibration, the energy of acquisition is for being powered Tire Pressure Monitor System transmitting terminal.
For electromagnetic energy collector, mostly important transduction assembly is elastic construction and internal magnetic field.Tradition
Although the elastic construction structure design of single straight beam formula is simple, volume is larger, and space utilization rate is low, the nothing small for size
Practicability is poor for line sensor node, therefore on the basis of guaranteeing coefficient of elasticity and controllable characteristic frequency, reduces outstanding
The size of arm beam, the space layout for optimizing cantilever beam are particularly significant for reducing energy harvester volume, while also contributing to more
A energy collection unit realizes array design.On the other hand, degree of coupling of the magnetic Circuit Design of internal magnetic field for magnetoelectricity
Tool has a significant impact, and optimizes magnetic Circuit Design, reduces the leakage in magnetic field for improving the electromechanical conversion efficiency of energy harvester very
It is important.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention reduces the size of cantilever beam and optimizes
The space layout of cantilever beam designs a kind of completely new vibrational energy collector.
Technical solution: the electromagnetic vibration energy collector provided by the invention based on folding cantilever beam of special, including pedestal, matter
Gauge block and folding cantilever beam of special, the both ends and middle part of the folding cantilever beam of special form circuitous configuration, and both ends are fixedly connected with pedestal, in
Portion is fixedly connected with mass block；Several coils are fixedly connected on pedestal through support base, and the mass block surrounds coil, adjacent
Mass block between coil is embedded in installation permanent magnet, and the permanent magnet, mass block and folding cantilever beam of special collectively form spring matter
Gauge block oscillatory system.
Specifically, the coil is in rectangle, and each support base fixes two coils.
Specifically, the support base is fixed on pedestal or is integrally formed with pedestal.
Specifically, the permanent magnet is fixedly connected on mass block, and material is Nd Fe B alloys.
Specifically, the folding cantilever beam of special material is beryllium-bronze, using centrosymmetric structure, the shape with single lap
Shape.
It specifically, further include electric power management circuit, electric power management circuit includes full-wave rectifier filter circuit and pressure stabilizing electricity
Road, output interface is for exporting 3.3V or 1.8V burning voltage.
Using multiple permanent magnets, pole orientation arrangement is consistent, and the opposite face of each two permanent magnets is equal in horizontal direction
For opposite magnetic pole, closed magnetic circuit is consequently formed, reduces magnetic induction line leakage, improves magnetic flux utilization rate.Coil winding direction is identical,
And connection type is series connection, the induced electromotive force generated in multiple coils is overlapped mutually, effectively enhancing output voltage.
In use, pedestal is fixedly mounted on the vibration source surface of energy to be collected, the both ends of pedestal and folding cantilever beam of special
End be fixedly connected, several coils are fixedly connected on pedestal through support base, mass block surround coil simultaneously be fixed on folding
Below the hanging middle part of cantilever beam, permanent magnet is mounted in the mass block between adjacent windings；I.e. mass block is equipped with several
Hollow-out parts are surrounded coil and are sequentially arranged at intervals with the hollow-out parts that permanent magnet is fixedly mounted；Permanent magnet, mass block and folding cantilever beam of special
Collectively form spring-mass block oscillatory system.When pedestal vibration, the coil is moved with respect to the magnetic force line cutting of permanent magnet, line
Induced current is generated in circle.
The utility model has the advantages that space layout of the present invention using optimization cantilever beam, the series design pressure of coupling coil and permanent magnet
Contracted volume, is set by optimization magnetic circuit and improves electromechanical conversion efficiency.
Except it is above-described present invention solves the technical problem that, constitute technical solution technical characteristic and by these technologies
Outside advantage brought by the technical characteristic of scheme.To keep the object of the invention, technical scheme and beneficial effects clearer, below will
In conjunction with the attached drawing in the embodiment of the present invention, to other for including in the other technologies problem of the invention that can solve, technical solution
The advantages of technical characteristic and these technical characteristics are brought does apparent, complete description.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the folded beam electromagnetic vibration energy collector of the embodiment of the present invention；
Fig. 2 is the cross-sectional view of Fig. 1；
In figure: 1- pedestal；2- electric power management circuit；3- support base；4- coil；5- folding cantilever beam of special；6- permanent magnet；7- mass
Block.
Specific embodiment
Embodiment:
For the mechanical equipments such as gasoline engine, diesel engine generate at work specific frequency vibration characteristic, the present embodiment based on
The electromagnetic vibration energy collector of folding cantilever beam of special is for collecting surface vibration energy, and it is micro- that these energy, which are converted to electric energy,
Miniature electric system power supply, the microminiature electronic system are micro wireless sensor nodes, and the power supply for accessing energy harvester can
Extend battery.
As depicted in figs. 1 and 2, energy harvester includes pedestal 1, electric power management circuit 2, coil support seat 3, coil 4, folding
Folded cantilever beam 5, permanent magnet 6 and mass block 7.1 folding cantilever beam of special 5 of pedestal provides fixed support, and passes through coil branch
Support seat 3 is that coil 4 provides fixed support.The support base 3 can be directly integrated with pedestal 1, or it is fixed by the methods of glue connection
In pedestal 1.The coil 4 is fixed on the two sides at 3 top of support base by the method for glue connection.All coils winding having the same
Direction, and be connected in series to together.The folded beam 5 uses beryllium-bronze material, easily adds since beryllium-bronze has
The high feature of work, elasticity, can be realized, and coefficient of elasticity with higher and service life by surface manufacturing process.It is described
Symmetrical thin slice centered on the shape of folded beam 5 can be equivalent to two small straight beams with equal length and use parallel, can be with
While guaranteeing cantilever beam coefficient of elasticity, cantilever beam volume, and the cantilever beam structure of this Distributed Design are effectively reduced
Central part has larger space, and permanent magnet 6 and mass block 7 are integrated in the inner space of cantilever beam encirclement, keeps system whole
Compact layout improves space utilization rate.The mass block 7 is screwed with folding cantilever beam of special 5 or glue connection is fixed.Institute
Stating 6 material of permanent magnet is Nd Fe B alloys, has the characteristics that residual magnetic flux density is high, and pole orientation arrangement is consistent, horizontal
The opposite face of each two permanent magnets is opposite magnetic pole on direction, and closed magnetic circuit is consequently formed, and reduces magnetic induction line leakage, improves
Magnetic flux utilization rate.The electric power management circuit 2 is fixed on pedestal 1 by the method for glue connection, by pcb board and electronic component group
At with current rectifying and wave filtering circuit and voltage regulator circuit, guarantee output port can export burning voltage in certain loading range.
The intermediate hollow out of mass block 7 can generate relative motion with coil 4 in vertical direction, and by foldable suspension arm
The constraint of beam 5 will not generate over-large displacement, and displacement amplitude controls within coil height.Exist between permanent magnet 6 and coil 4
The air gap within 0.5mm, when guaranteeing vertical direction relative motion, permanent magnet 6 and coil 4 are not in friction, collision
Phenomena such as.Permanent magnet 6 and mass block 7 collectively form system vibration mass block, and constitute spring mass with folding cantilever beam of special 5
Block oscillatory system has specific resonant frequency.When vibration source vibration frequency is approached or is equal to resonant frequency, cantilever beam 5 will
Reach the amplitude peak of vibration.Level of vibrational energy collector answering is fixed on vibration source surface.When vibration source surface generates vibration
It will drive energy harvester pedestal 1 to vibrate jointly, permanent magnet 6 and mass block 7 transmitted these vibrations to by folding cantilever beam of special 5.
When reaching resonance condition, mass block 7 drives permanent magnet 6 to generate relative motion with coil in vertical direction.Due to this movement
Under the conditions of, magnetic flux generating period changes in coil 4, to generate induced electromotive force in coil 4；Again due to 4 coiling of coil
Direction is identical, and connection type is series connection, and the induced electromotive force generated in coil 4 is overlapped mutually, effectively enhancing output voltage.Line
Circle is in identical height, and under the driving of oscillating magnetic field, the alternating voltage that generates in coil 4 has same phase, will not be because of
Phase is asynchronous and generates the loss of voltage.Rectifying and wave-filtering electricity in the alternating voltage input power management circuit 2 of coil output 4
Road is rectified into half-wave signa by full-wave bridge rectifier circuit, then realizes preliminary direct current signal by filter capacitor.But this
When direct-flow signal voltage stability bandwidth it is higher, and not the standard supply voltage of common electronics device, it is therefore desirable to which input is steady
Volt circuit further decreases noise, and voltage stabilization is guaranteed that stablizing for device supplies in the standard supply voltage level of load
Electricity.
The present invention provides a kind of completely new structure for electromagnetic vibration energy collector, implements the technical solution
There are many method and approach, and described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Usually herein
The component of the embodiment of the present invention described and illustrated in place's attached drawing can be arranged and be designed with a variety of different configurations.Therefore,
The range of claimed invention is not intended to limit to the detailed description of the embodiment of the present invention provided in attached drawing, but
It is merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Claims (8)
1. a kind of electromagnetic vibration energy collector based on folding cantilever beam of special, it is characterised in that: including pedestal, mass block and folding
Folded cantilever beam, the both ends and middle part of the folding cantilever beam of special form circuitous configuration, and both ends are fixedly connected with pedestal, middle part and quality
Block is fixedly connected；Several coils are fixedly connected on pedestal through support base, and the mass block surrounds coil, between adjacent windings
Mass block be embedded in installation permanent magnet, the permanent magnet, mass block and folding cantilever beam of special collectively form the oscillation of spring-mass block
System.
2. the electromagnetic vibration energy collector according to claim 1 based on folding cantilever beam of special, it is characterised in that: described
Coil is in rectangle, and each support base fixes two coils.
3. the electromagnetic vibration energy collector according to claim 1 based on folding cantilever beam of special, it is characterised in that: described
Support base is fixed on pedestal or is integrally formed with pedestal.
4. the electromagnetic vibration energy collector according to claim 1 based on folding cantilever beam of special, it is characterised in that: described
Permanent magnet is fixedly connected on mass block, and the material of permanent magnet is Nd Fe B alloys.
5. the electromagnetic vibration energy collector according to claim 1 based on folding cantilever beam of special, it is characterised in that: described
Folding cantilever beam of special material is beryllium-bronze, and using single lap structure, top view is centrosymmetric.
6. the electromagnetic vibration energy collector according to claim 1 based on folding cantilever beam of special, it is characterised in that: also wrap
Electric power management circuit is included, electric power management circuit includes full-wave rectifier filter circuit and voltage regulator circuit, and output interface is for exporting
3.3V or 1.8V burning voltage.
7. the electromagnetic vibration energy collector according to claim 1 based on folding cantilever beam of special, it is characterised in that: described
The pole orientation arrangement of permanent magnet is consistent.
8. the electromagnetic vibration energy collector according to claim 1 based on folding cantilever beam of special, it is characterised in that: described
Coil winding direction is identical, and adjacent windings are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607253.8A CN110212731B (en) | 2019-07-07 | 2019-07-07 | Electromagnetic vibration energy collector based on folding cantilever beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607253.8A CN110212731B (en) | 2019-07-07 | 2019-07-07 | Electromagnetic vibration energy collector based on folding cantilever beam |
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| Publication Number | Publication Date |
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| CN110212731A true CN110212731A (en) | 2019-09-06 |
| CN110212731B CN110212731B (en) | 2021-03-19 |
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| CN201910607253.8A Active CN110212731B (en) | 2019-07-07 | 2019-07-07 | Electromagnetic vibration energy collector based on folding cantilever beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337372A (en) * | 2022-02-21 | 2022-04-12 | 上海声动微科技有限公司 | MEMS energy collector and manufacturing method thereof |
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| US7245049B2 (en) * | 2003-02-28 | 2007-07-17 | Citizen Electronics Co., Ltd. | Vibrator and method for manufacturing the same |
| CN101924451A (en) * | 2010-07-30 | 2010-12-22 | 安徽大学 | High-performance micro electromagnetic vibration energy harvester easy for integrated manufacturing |
| CN102468738A (en) * | 2010-10-28 | 2012-05-23 | 财团法人工业技术研究院 | Vibrating Electromagnetic Generator |
| CN102611351A (en) * | 2012-03-23 | 2012-07-25 | 东南大学 | Piezoelectricity-magnetic electricity mixed energy collection device |
| CN203301337U (en) * | 2013-06-03 | 2013-11-20 | 张新朋 | Absorption converter of linear electromagnetic vibration energy |
| CN105720779A (en) * | 2016-03-10 | 2016-06-29 | 西南交通大学 | Electromagnetic vibration power generation device |
| CN107465325A (en) * | 2017-09-30 | 2017-12-12 | 清华大学深圳研究生院 | Micro electromagnetic vibration energy harvester and self-powered module |
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- 2019-07-07 CN CN201910607253.8A patent/CN110212731B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7245049B2 (en) * | 2003-02-28 | 2007-07-17 | Citizen Electronics Co., Ltd. | Vibrator and method for manufacturing the same |
| CN101924451A (en) * | 2010-07-30 | 2010-12-22 | 安徽大学 | High-performance micro electromagnetic vibration energy harvester easy for integrated manufacturing |
| CN102468738A (en) * | 2010-10-28 | 2012-05-23 | 财团法人工业技术研究院 | Vibrating Electromagnetic Generator |
| CN102611351A (en) * | 2012-03-23 | 2012-07-25 | 东南大学 | Piezoelectricity-magnetic electricity mixed energy collection device |
| CN203301337U (en) * | 2013-06-03 | 2013-11-20 | 张新朋 | Absorption converter of linear electromagnetic vibration energy |
| CN105720779A (en) * | 2016-03-10 | 2016-06-29 | 西南交通大学 | Electromagnetic vibration power generation device |
| CN107465325A (en) * | 2017-09-30 | 2017-12-12 | 清华大学深圳研究生院 | Micro electromagnetic vibration energy harvester and self-powered module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337372A (en) * | 2022-02-21 | 2022-04-12 | 上海声动微科技有限公司 | MEMS energy collector and manufacturing method thereof |
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| CN110212731B (en) | 2021-03-19 |
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