CN101814817B - Disresonance non-contact type vibration energy collector - Google Patents
Disresonance non-contact type vibration energy collector Download PDFInfo
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- CN101814817B CN101814817B CN2010101438388A CN201010143838A CN101814817B CN 101814817 B CN101814817 B CN 101814817B CN 2010101438388 A CN2010101438388 A CN 2010101438388A CN 201010143838 A CN201010143838 A CN 201010143838A CN 101814817 B CN101814817 B CN 101814817B
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Abstract
The invention relates to a disresonance non-contact type vibration energy collector, which is characterized in that the energy collector consists of a mass block and a spring electricity generation system, wherein the mass block senses the external vibration, the spring electricity generation system generates the electric energy, the mass block senses the external vibration, the energy is transferred to a spring through repulsion force between the mass block and the spring electricity generation system, the spring is driven to vibrate, and the electric energy is generated through the electromagnetic effect. In the work process of the energy collector, the spring electricity generation system does not need to generate the resonance with the external vibration, so the energy collector can work in a low frequency range, and the influence of the electricity generation power by the external vibration frequency is little. The mass block is not in contact with the spring electricity generation system, so the reliability of the device is good. The spring is driven by the repulsion force, and the repulsion force can be very great, so the electricity generation power is high. The invention can be applied to wireless sensors, wireless communication and the like, can be used for supplying the electricity for wireless equipment, replaces the original battery electricity supply method, and has wide application prospect.
Description
Technical field
The present invention relates to the contactless vibration energy collector of a kind of disresonance, the invention belongs to the micro mechanical sensor field.
Background technology
Along with developing rapidly of radio sensing network and microelectromechanical systems, wireless devices such as many wireless sensers have appearred.How to be subjected to people's attention more and more for their power supplies effectively.At present these systems are mainly by powered battery, and still, the life-span of battery is short, and stored energy is limited, and for desiring power supply device, often volume and quality are big for they, and it is very high to change the battery cost in some applications, the process complexity.Therefore, the powerup issue that how to solve wireless device becomes the focus of research.
Vibration energy collector can convert the vibrational energy that exists in the environment to electric energy.According to its working method, can be divided into electrostatic, piezoelectric type and three kinds of (S.P.Beeby of electromagnetic type, M.J.Tudor and N.M.White, " Energy harvesting vibration sources for microsystems applications; " Measurement Science and Technology, vol.17, p.R175,2006.).For traditional vibration energy collector, when having only near the resonance frequency of vibration frequency vibrational structure in energy collecting device of external environment, vibrational structure generation resonance, amplitude is bigger, and energy collecting device could produce more electric energy.When the vibration frequency of external environment departed from the resonance frequency of vibrational structure in the energy collecting device, the electric energy of its generation was relatively very little.
2009, University of Michigan has made non-resonant energy collecting device (T.Galchev, H.Kim andK.Najafi, " Non resonant bi-stable frequency-increased power scavenger fromlow-frequency ambient vibration, " Transducers 2009, Denver, CO, USA, June21-25,2009, p.632.).By magnetic attraction, mass alternately with two springs up and down on the magnet adhesive and separate.Mass separates rear spring free vibration with magnet on the spring, generates electricity by galvanomagnetic effect.This energy collecting device passes through the adhesive of magnet and separates driving spring, does not need and extraneous vibration generation resonance, can work under the extraneous frequency of broad, and generating efficiency is subjected to the extraneous vibration frequency influence very little.But owing to use magnetic adhesion work, so the suction of magnet on the mass and the magnet on the vibrating spring can not be too big, otherwise can cause and can't separate, device can not be worked, so the power of its generating is restricted; And because each mass and spring adhesive bump, the reliability of its energy collecting device can not guarantee.
Summary of the invention
Limited in order to overcome existing energy collecting device operating frequency, generated output is little, and the deficiency of poor reliability the object of the present invention is to provide the contactless vibration energy collector of a kind of disresonance.Described energy collecting device is made up of the mass of induction extraneous vibration and the spring-generation system of generation electric energy.Mass induction extraneous vibration is given spring by the pulse repulsive force between mass and the spring-generation system with energy delivery, and the driving spring vibration produces electric energy by galvanomagnetic effect.Energy collecting device of the present invention is by drive magnet and by the pulse repulsive force driving spring system vibration between the moving magnet, so do not need to vibrate with external environment, can in wide frequency range, work, generated output is subjected to the extraneous vibration frequency influence little, and the generated output height, unfailing performance is good.Described repulsive force can be a magnetic repulsion, and various forms of repulsive forces such as electric repulsive force are the example explanation with the magnetic repulsion in principle of the present invention explanation and example.
The basic principle of the vibration energy collector that disresonance of the present invention is contactless is as follows:
As shown in Figure 1, described energy collecting device is made up of the mass of induction extraneous vibration and the spring-generation system of generation electric energy.Drive magnet is arranged on the mass, and when device vibrated along with external environment, mass can move in direction as shown in the figure owing to be subjected to the effect of inertia force.The spring-generation system is by spring, is positioned at being formed with being fixed on by the coil around the moving magnet by moving magnet on the spring.Spring and constituted vibrational system by moving magnet can vibrate according to own eigenfrequency.By drive magnet with by the pulsed magnetic repulsive force between the moving magnet, mass is given the spring-generation system with energy delivery, the driving spring vibration, be positioned on the spring by moving magnet also along with spring vibration, magnetic flux in the coil changes, according to galvanomagnetic effect, can excite induced electromotive force in coil, thereby produce electric energy.
The course of work of energy collecting device of the present invention such as Fig. 2 are to shown in Figure 4.When not vibrating in the external world, mass is parked in position as shown in Figure 2.Because relative far away by the moving magnet distance on the drive magnet on the mass and the spring, the magnetic force between them is very little, so spring is static or free vibration.If at a time a downward acceleration acts on above the device, because effect of inertia, mass can move up with respect to spring.When it arrived as shown in Figure 3 position, the magnetic pole of drive magnet was relative with the magnetic pole by moving magnet on the spring on the mass, and magnetic pole is identical, so there is the effect of magnetic repulsion between them.Under the effect of this magnetic force, deformation can take place in spring.Mass continues to move up, and as shown in Figure 4, leaves position shown in Figure 3 and since only when two magnetic poles are relative magnetic force just apparent in view, so suffered magnetic repulsion can disappear at once on the spring, spring and begun free vibration by moving magnet.Since on the spring by the vibration of moving magnet, variations that can change of the magnetic flux in the coil, thus excite induced electromotive force, the generation electric energy.In the course of the work, mass pumps, and every drive magnet is given by pulsed magnetic repulsive force of moving magnet through as shown in Figure 3 position once, and the vibration of driving spring electricity generation system produces electric energy, thereby does not need and extraneous vibration generation resonance; Because active force is repulsive force, power can be very big, thus the generated output height, and mass and spring vibration system do not come in contact good reliability.
This shows that vibration energy collector provided by the invention is characterised in that:
1. adopt mass induction extraneous vibration, give the spring-generation system by the pulse repulsive force between mass and the spring-generation system with energy delivery, the driving spring vibration produces electric energy; Energy source is in the vibration in the external world; The driving magnetic patch is embedded in the mass or sticks on the mass surface;
2. by the extraneous vibration of mass induction, mass is with respect to the spring-generation system motion;
3. mass by and the spring-generation system between repulsive force give the spring-generation system with energy delivery, make spring generation deformation.This repulsive force can be various forms of repulsive forces such as magnetic repulsion, electrostatic repulsion forces; Be the repulsive force effect between mass and the spring-generation system, thereby in the course of the work, mass and spring-generation system do not come in contact;
4. the spring-generation system drives vibration afterwards through mass and the pulse repulsive force between it, do not need and extraneous vibration generation resonance, thus can in wide frequency range, work, and generated output is subjected to the extraneous vibration frequency influence little;
5. the electric energy of described energy collecting device is that vibration by the spring-generation system obtains, thereby the frequency of the electric energy that is produced is by the decision of spring-generation system, with the frequency-independent of extraneous vibration.
In sum, the contactless vibration energy collector of this disresonance can be converted into electric energy with the vibrational energy of external environment.Particularly, the contactless energy collecting device of this disresonance is made up of the mass of induction extraneous vibration and the spring-generation system of generation electric energy.Adopt mass induction extraneous vibration, give spring by the pulse repulsive force between mass and the spring-generation system with energy delivery, the driving spring vibration produces electric energy by galvanomagnetic effect, and has the following advantages:
(1) is repulsive force owing to what utilize,, thereby increased the generated output of energy collecting device so magnetic repulsion can be very big;
(2) in the course of the work, induction mass and spring-generation system do not come in contact, and not collision is so the reliability of energy collecting device is improved;
(3) whole system is disresonance, drive vibrational system by drive magnet with by the pulse repulsive force between the moving magnet, vibrational system does not need and extraneous vibration generation resonance, so energy collecting device can be worked in very wide frequency range, generated output is subjected to the extraneous vibration frequency influence little;
(4) because generating is that vibration by spring obtains, its frequency can be changed by changing spring-mass piece vibrational structure so produce the frequency of electric energy, with the frequency-independent of extraneous vibration by the system frequency decision of spring-mass piece.
Vibration energy collector provided by the invention is expected to be applied to wireless senser, wireless telecommunications etc., for the wireless device power supply, substitutes original powered battery mode, is with a wide range of applications.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is the schematic diagram of energy collecting device of the present invention;
Fig. 2 is the structural representation of mass bottom the time;
Fig. 3 be on drive magnet on the mass and the spring by moving magnet over against the time structural representation;
Fig. 4 is that mass continues to move the structural representation when leaving magnet over against the position;
Fig. 5 is the voltage output image of this energy collecting device;
Fig. 6 is the output AC voltage frequency image of this energy collecting device.
Among the figure:
1---mass; 2---the drive magnet on the mass; 3---vibrating spring; 4---on the spring by moving magnet; 5---coil; 6---the moving direction of mass.
Embodiment
Further set forth the substantive distinguishing features and the marked improvement of the contactless vibration energy collector of disresonance provided by the invention below by specific embodiment.But the present invention only limits to embodiment by no means.
Shown in the schematic diagram of Fig. 1, the mass 1 of induction extraneous vibration is the copper product of cuboid, and is its long 46 millimeters, wide 20 millimeters, high 18 millimeters.By guide rail it is moved on vertical direction, movable displacement is 70 millimeters.Drive magnet 2 on the centroplasm gauge block adopts Nd-Fe-B permanent magnet, and it is shaped as cylindrical, and 6 millimeters of diameters are high 10 millimeters, magnetic field intensity 0.3 tesla.Vibrating spring 3 adopts 0.1 millimeter beryllium copper sheet to be made, and is adopted Nd-Fe-B permanent magnets by moving magnet 4 on the vibrating spring 3, and it is shaped as cylindrical, and 6 millimeters of diameters are high 10 millimeters, magnetic field intensity 0.3 tesla.Being fixed on by the coil around the moving magnet is 0.05 millimeter enamelled wire coiled by diameter, the number of turn 2000 circles, and resistance value is 1428 ohm.
This energy collecting device is under an acceleration of gravity, and the alternating voltage peak-to-peak value of its generation can reach 6 volts (as shown in Figure 5).The frequency of alternating voltage is 51 hertz (as shown in Figure 6).The instantaneous peak power of generating electricity surpasses 3 milliwatts.
Claims (9)
1. the vibration energy collector that disresonance is contactless is characterized in that described vibration energy collector is made of the mass of induction extraneous vibration and the spring-generation system of generation electric energy; Wherein, the driving magnetic patch is arranged on the mass, the spring-generation system by vibrating spring, be positioned at the passive magnetic patch on the vibrating spring and near be fixed on the vibrating spring coil constitutes.
2. by the described vibration energy collector of claim 1, it is characterized in that driving magnetic patch and be embedded in the mass or stick on the mass surface.
3. by the described vibration energy collector of claim 1, it is characterized in that the vibrational system that vibrating spring and passive magnetic patch constitute, by the eigenfrequency vibration.
4. by the described vibration energy collector of claim 1, it is characterized in that mass be by and the spring-generation system between repulsive force give the spring-generation system with energy delivery, make spring generation deformation.
5. by the described vibration energy collector of claim 4, it is characterized in that described repulsive force is a magnetic repulsion.
6. by the described vibration energy collector of claim 1, it is characterized in that in the collector course of work mass and spring-generation system do not come in contact.
7. by the described vibration energy collector of claim 1, the whole system that it is characterized in that described collector is disresonance, does not need and extraneous vibration generation resonance, works in wide frequency range.
8. by the described vibration energy collector of claim 1, it is characterized in that:
1. mass is the cuboid copper product, and it is in movement in vertical direction by guide rail;
2. driving magnetic patch on the mass and the passive magnetic patch on the vibrating spring are the cylinder type neodymium iron boron permanent magnet, and magnetic field intensity is 0.3 tesla;
3. vibrating spring adopts 0.1 millimeter beryllium copper sheet to be made;
4. be fixed on coil around the passive magnetic patch and be enamelled wire coiled by 0.05mm.
9. by the described vibration energy collector of claim 1-8, it is characterized in that the alternating voltage peak-to-peak value that produces can reach 6 volts under an acceleration of gravity, the generating instantaneous power surpasses 3 milliwatts.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158039B (en) * | 2011-03-02 | 2013-01-09 | 上海交通大学 | Micro broadband electromagnetic type vibration energy collector |
| CN102882344A (en) * | 2012-10-29 | 2013-01-16 | 河北工业大学 | Permanent-magnet vibration power generating device for small-power electronic equipment |
| CN103795219B (en) * | 2014-01-15 | 2016-09-14 | 江苏大学 | A kind of generated output adjustable electromagnetic vibration energy catcher |
| CN108964400B (en) * | 2017-05-23 | 2023-08-04 | 西华大学 | Permanent magnet array type vibration energy collector based on arch structure |
| CN107857231B (en) * | 2017-10-24 | 2019-06-11 | 华中科技大学 | A kind of Micro-electro-mechanaccelerometer accelerometer and preparation method thereof |
| CN108054896B (en) * | 2017-12-22 | 2019-07-19 | 华中科技大学 | A kind of Three Degree Of Freedom electromagnetism absorbing energy accumulator |
| CN109217613B (en) * | 2018-11-27 | 2020-07-14 | 上海交通大学 | Vibration absorption power generation system |
| CN115296505A (en) * | 2022-07-19 | 2022-11-04 | 山东大学 | Nonlinear energy trap and magnet coil combined energy capturer and control method thereof |
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| DE10055908A1 (en) * | 2000-11-10 | 2002-05-23 | Erhard Otte | Device for obtaining electrical energy has end stops that temporarily store inertial mass kinetic energy released during braking as potential energy, release it to mass again as it leaves stop |
| US7498681B1 (en) * | 2007-03-21 | 2009-03-03 | Sandia Corporation | Mechanical vibration to electrical energy converter |
| CN101515746A (en) * | 2009-03-20 | 2009-08-26 | 北京大学 | Micro electromagnetic energy harvester and a preparation method |
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| JP2005155345A (en) * | 2003-11-20 | 2005-06-16 | Denso Corp | Free-piston engine and generating equipment using the same |
| ITFI20060294A1 (en) * | 2006-11-24 | 2008-05-25 | Accent S P A | MINIATURIZED GENERATOR FOR OBTAINING ELECTRICAL ENERGY FROM VIBRATIONS. |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10055908A1 (en) * | 2000-11-10 | 2002-05-23 | Erhard Otte | Device for obtaining electrical energy has end stops that temporarily store inertial mass kinetic energy released during braking as potential energy, release it to mass again as it leaves stop |
| US7498681B1 (en) * | 2007-03-21 | 2009-03-03 | Sandia Corporation | Mechanical vibration to electrical energy converter |
| CN101515746A (en) * | 2009-03-20 | 2009-08-26 | 北京大学 | Micro electromagnetic energy harvester and a preparation method |
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