CN106899233A - A kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device - Google Patents
A kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device Download PDFInfo
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- CN106899233A CN106899233A CN201710244889.1A CN201710244889A CN106899233A CN 106899233 A CN106899233 A CN 106899233A CN 201710244889 A CN201710244889 A CN 201710244889A CN 106899233 A CN106899233 A CN 106899233A
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- 235000014676 Phragmites communis Nutrition 0.000 title claims abstract description 14
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 241000239290 Araneae Species 0.000 claims abstract description 9
- 230000008278 dynamic mechanism Effects 0.000 claims abstract description 9
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 230000006698 induction Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 1
- 230000007246 mechanism Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004377 microelectronic Methods 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
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- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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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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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The present invention relates to a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device.Including static mechanics and dynamic mechanism；Static mechanics include casing, and bearing spider, fixed magnet, upper coil and lower coil are provided with casing；Dynamic mechanism includes pendulum frame, spring leaf, oscillator magnet, and spring leaf is V-arrangement or U-shaped thin slice, and in its natural state, the upper and lower ends of spring leaf are in contact with the inner side roof and inner side bottom wall of casing respectively just；Oscillator magnet and fixed magnet magnetize vertically, and mutually exclusive.In the presence of extraneous vibrational excitation, pendulum frame is swung and drives axis of rotation, and then drives spring leaf and piezoelectric element to deform and produce electric charge, and electric energy is exported by electrode tip lead；On the other hand, the oscillator magnet on pendulum frame while swinging up and down, also moved therewith, and coil cutting magnetic induction line and produces induced-current in magnetic field, and electric current is exported by wire by the magnetic field around magnet.
Description
Technical field
The invention belongs to energy regenerating field, a kind of Reed type bistable electromagnetic Piezoelectric anisotropy collection of energy is related generally to
Device.
Background technology
In recent years, with the structure of the construction of smart city, the monitoring of environmental problem and Internet of Things, based on MEMS sensings
The technology of wireless sensing network of device, wireless telecommunications and embedded control system is able to fast development.But, allow radio sensing network
Node can be chronically at non-maintaining running status turns into the bottleneck for being pushed further into its application.Vibration is common as nature
Phenomenon, it is nearly ubiquitous and with energy density higher.Vibration energy harvesting technology can be by shaking in surrounding environment
Energy is converted to available electric energy, can effectively realize the self-power supply of radio sensing network node, is ground with great
Study carefully value and good development prospect.
The main method for collecting vibrational energy is using effects such as electrostatic, electromagnetism, piezoelectricity, by energy collecting device by outside
The vibrational energy in portion is converted into electric energy.Such as a kind of combined wide-band vibrational energy collector, the device is by shell and is arranged on
The piezoelectric beam of enclosure, two masses, two coils, two magnet compositions.One end of piezoelectric beam is horizontally fixed on shell
Inwall on, the other end is free end.Two masses are separately fixed at the upper and lower surface of piezoelectric beam free end；Two coils point
It is not fixed on two masses, two magnet are separately fixed on the inwall of shell.During vibration of piezoelectric beam, piezoelectric beam
The piezoelectric element of upper and lower surface is stressed and the effect that strains can produce electric charge to export.Meanwhile, vibration of piezoelectric beam causes it certainly
There is relative motion by the coil and upper and lower two magnet piece held, so that producing induced-current in coil.Although the structure is simultaneously
Electromagnetism, piezoelectricity double effect is employed to be generated electricity, but only when vibrational excitation frequency the consolidating close to piezoelectric beam of external environment
When having frequency, piezoelectric beam could be produced and significantly vibrated, and could produce obvious piezo-electric effect and electromagnetic induction phenomenon.But it is natural
Vibration in environment is often wide band random vibration, and the working band of the energy harvester is narrower, and generating efficiency extremely has
Limit.Therefore design the electromagnetism Piezoelectric anisotropy energy collecting device that a kind of working band is wide, oscillator vibration amplitude is big have it is larger
Research Significance and practical value.
The content of the invention
In order to make up, common electromagnetism Piezoelectric anisotropy energy collecting device working band is narrow, oscillator vibration amplitude is small, generating
The low defect of efficiency, the present invention provides a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device.
A kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device includes static mechanics and dynamic mechanism；
The static mechanics include box casing 1, and a middle side part is provided with bearing spider 4, relative opposite side in casing 1
Middle part is provided with one piece of fixed magnet of column 7；Casing 1 inside top adjacent with fixed magnet 7 is provided with least one upper coil
8, inside bottom is provided with least one lower coil 10, and at least one upper coil 8 and at least one lower coil
About 10 correspond to；
The dynamic mechanism includes the pendulum frame 2 of rectangular frame, and pendulum frame 2 is located at by rotating shaft 3 and the cooperation of bearing spider 4
In casing 1；The middle part of the rotating shaft 3 is connected to the middle part of the spring leaf 5 of V-arrangement or U-shaped, and the surface of spring leaf 5 is provided with piezoelectric element 9；
In its natural state, one end of spring leaf 5 is in contact with the inner side roof of casing 1 just, the other end just with the inner side of casing 1
Bottom wall is in contact；The other end of pendulum frame 2 is provided with the oscillator magnet 6 of at least one column, and the oscillator magnet 6 is perpendicular to pendulum frame
2, the two ends of at least one oscillator magnet 6 correspond to the lower coil of at least one upper coil 8 and at least one respectively
10；
Described at least one oscillator magnet 6 and fixed magnet 7 magnetizes vertically, and mutually exclusive；
During work, casing 1 is fixed on into mechanical structure or building structure etc. can produce in the structure of vibration；
In the presence of extraneous vibrational excitation, the swing for putting frame 2 drives rotating shaft 3 to rotate, and then drives spring leaf 5 and piezoelectricity
Element 9 deforms and produces electric charge, and electric energy is exported by the electrode tip lead of piezoelectric element 9；On the other hand, the oscillator on pendulum frame 2
Magnet 6 while swinging up and down, also move therewith by the magnetic field around magnet, at least one upper coil 8 and at least one
Lower coil 10 cutting magnetic induction line and produce induced-current in magnetic field, electric current is exported by wire.
The technical scheme for further limiting is as follows：
The material of the casing 1 is copper or aluminium；Insulating barrier is respectively equipped with the inner side roof and inner side bottom wall of casing 1, from
And avoid being turned on the lower coil 10 of described at least one upper coil 8 and at least one.
The other end of the pendulum frame 2 is provided with three oscillator magnet 6.
The material of the pendulum frame 2 is copper.
The material of the spring leaf 5 is spring steel or elastic metallic.
The material of the fixed magnet 7 and the material of oscillator magnet 6 are Nd-Fe-B permanent magnet.
The material of the piezoelectric element 9 is Kynoar.
Advantageous Effects of the invention embody in the following areas：
1. the present invention is a kind of electromagnetism Piezoelectric anisotropy energy collecting device, while having used electromagnetic induction phenomenon and piezoelectricity to imitate
Two kinds of electricity generating principles are answered to be operated, space structure utilization rate is higher, and energy acquisition efficiency can also be effectively improved.Can not disappear
Consume the microelectronic components such as the microsensor that any fossil energy is low-power consumption and adopt and can and power, be a kind of environmentally friendly energy
Amount collection device.
2. traditional elastic cantilever and oscillator mass instead of present invention uses pendulum frame and oscillator magnet.Traditional
Elastic cantilever one end is often using the connected mode being fixedly connected, and the pendulum frame one end in apparatus of the present invention is realized by rotating shaft
Connection is rotated, this oscillator magnet for causing to put the frame other end is obtained in that bigger vibration displacement, it is possible to increase electromagnetic induction effect,
Make to produce bigger induced-current in coil.
3. the present invention is a kind of bistable structure, for the pendulum frame in device, there is upper and lower two stable positions, is made
Spring leaf is mutually balanced for the rotating torque that the repulsion of the elastic-restoring force that provides of pendulum frame and magnet is produced at rotating shaft so that
Pendulum frame and oscillator magnet is produced bistable vibration mode, can further increase the amplitude of fluctuation of pendulum frame, significantly increase system
The deflection of bandwidth, increase spring leaf and piezoelectric element, strengthens piezo-electric effect.Compared with monostable cantilever beam structure,
Under identical external vibration incentive action, pendulum frame vibration amplitude of the invention can reach more than 1.6 times of cantilever beam vibration amplitude,
The Open Output Voltage of piezoelectric element is at least 2 times of cantilever beam structure.Meanwhile, the increase of amplitude can further improve coil again
Variation rate of magnetic flux, so as to significantly improve generating efficiency.
Brief description of the drawings：
Fig. 1 is the space structure figure of apparatus of the present invention.
Fig. 2 is the static mechanics of apparatus of the present invention.
Fig. 3 is the dynamic mechanism of apparatus of the present invention.
Fig. 4 be apparatus of the present invention in put frame swing to top stable position when force diagram.
Fig. 5 is the device space structure figure comprising three blocks of oscillator magnet and three pairs of coils.
Fig. 6 is the static mechanics of apparatus housing, bearing spider, three pairs of coils and fixed magnet composition.
Fig. 7 puts frame, rotating shaft, spring leaf, piezoelectric element and three pairs of dynamic mechanisms of oscillator magnet composition for device.
In all of the figs, identical reference be used for represent identical element or structure, wherein：
Sequence number in upper figure：Casing 1, pendulum frame 2, rotating shaft 3, bearing spider 4, spring leaf 5, oscillator magnet 6, fixed magnet 7, top
Coil 8, piezoelectric element 9, lower coil 10.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is further described by embodiment.
Embodiment 1
Referring to Fig. 1, a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device includes static mechanics and dynamic
Mechanism.
Referring to Fig. 2, static mechanics include box casing 1, and a middle side part is provided with bearing spider 4 in casing 1, relative
Opposite side middle part is provided with one piece of fixed magnet of column 7；Casing 1 inside top adjacent with fixed magnet 7 is provided with a top
Coil 8, inside bottom is provided with a lower coil 10, and upper coil 8 and lower coil are corresponded to about 10.The material of casing 1
Expect to be aluminium, insulating barrier is respectively equipped with the inner side roof and inner side bottom wall of casing 1, so as to avoid and upper coil 8 and lower line
Circle 10 is turned on.
Referring to Fig. 3, dynamic mechanism includes the pendulum frame 2 of rectangular frame, and the material for putting frame 2 is copper.The one end for putting frame 2 passes through
Rotating shaft 3 and the cooperation of bearing spider 4 are installed in casing 1.The middle part of rotating shaft 3 is connected to the middle part of spring leaf 5, and spring leaf 5 is V-arrangement
Thin slice, material is spring steel.In its natural state, the lucky inner side roof and inner side bottom respectively with casing 1 in the two ends of spring leaf 5
Wall is in contact, and the surface of spring leaf 5 is provided with piezoelectric element 9；The material of piezoelectric element 9 is Kynoar (PVDF).Put the another of frame 2
One end is provided with an oscillator magnet 6 for column, and perpendicular to pendulum frame 2, the two ends of oscillator magnet 6 correspond to oscillator magnet 6 respectively
Upper coil 8 and lower coil 10.A diameter of 30mm of oscillator magnet 6, is the half of the diameter of upper coil 8, and oscillator magnet 6 is arrived
The distance of rotating shaft 3 is 4 with the ratio of distances constant of oscillator magnet 6 to fixed magnet 7：1.The material of fixed magnet 7 and the material of oscillator magnet 6
Nd-Fe-B permanent magnet is, the performance trade mark is N35, magnetizes vertically, and mutually exclusive.
During work, device is fixed on into mechanical structure or building structure etc. by casing 1 can produce in the structure of vibration.
In the presence of extraneous vibration excitation, pendulum frame 2 swings and drives rotating shaft 3 to rotate, and then drives spring leaf 5 and piezoelectric element 9 to deform
And produce electric charge, electric energy to be exported by electrode tip lead；On the other hand, the oscillator magnet 6 on pendulum frame 2 is same what is swung up and down
When, the magnetic field around magnet is also moved therewith, and upper coil 8 and lower coil 10 cutting magnetic induction line and produce sensing in magnetic field
Electric current, electric current is drawn by wire.
Referring to Fig. 4, ignore induced current in coil produce magnetic field to the micro force of the end oscillator magnet 6 of pendulum frame 2 with
And gravity influence, when put frame 2 swing to top a certain ad-hoc location when, spring leaf 5 for pendulum frame 2 provide elastic-restoring force turn
The rotating torque size produced at axle 3 is M, the magnetic reprimand of the end oscillator magnet 6 of the pendulum of fixed magnet 7 pairs frames on the right side inwall of casing 12
Power size is F, and the distance of spindle central point to magnetic repulsion F positions is d, and M=Fd, i.e. spring leaf 5 are now met just is
The elastic-restoring force that pendulum frame 2 is provided and the rotating torque that the repulsion of magnet is produced at rotating shaft 3 are mutually balanced, therefore this position
It is a stable position for putting frame 2.Similarly, in lower section corresponding position, there is another stable position so that pendulum frame 2 stress is put down
Weighing apparatus.In the presence of extraneous vibrational excitation, pendulum frame 2 produces bistable vibration, significantly increases the amplitude of fluctuation of pendulum frame 2, increases
Big system bandwidth, increased the deflection of spring leaf 5 and piezoelectric element 9.Compared with monostable cantilever beam structure, in phase
Under same external vibration incentive action, the pendulum vibration amplitude of frame 2 of the invention can reach more than 1.6 times of cantilever beam vibration amplitude,
The Open Output Voltage of piezoelectric element is at least 2 times of cantilever beam structure.At the same time, the increasing of pendulum frame 2 and the amplitude of oscillator magnet 6
The big variation rate of magnetic flux for also improving upper coil 8 and lower coil 10, so as to greatly improve efficiency of energy collection.
Embodiment 2
Referring to Fig. 5, Fig. 6 and Fig. 7, in the present embodiment, casing 1 inside top adjacent with fixed magnet 7 is provided with three
Portion's coil 8, inside bottom is provided with three lower coils 10；The other end for putting frame 2 is provided with three oscillator magnet 6 of column；
Three two ends of oscillator magnet 6 correspond to three upper coils 8 and three lower coils 10 respectively.Other structures with embodiment 1,
Operation principle is with embodiment 1.
The present embodiment has used three oscillator magnet, 6, three upper coils 8 and three lower coils 10, can greatly improve
The Electromagnetic generation amount of coil；On the other hand, because the quantity of oscillator magnet 6 increases three, therefore put what the end of frame 2 was subject to
Magnet repulsion sum can also be doubled.Compared with Example 1, the top stable position in the pendulum vibration processes of frame 2 will be shifted up, and bottom is steady
State position can move down, and the distance of upper and lower two stable positions becomes big, thus pendulum frame 2 can produce the bistable state of bigger amplitude to shake
Dynamic, spring leaf 5 and piezoelectric element 9 can also produce bigger deflection, while improve upper coil 8 and lower coil 10 again
Variation rate of magnetic flux, efficiency of energy collection has obtained further raising.
Apparatus of the present invention can be used for the vibration energy harvesting of mechanical structure, building structure etc..It is multiple as a kind of electromagnetism piezoelectricity
Energy collecting device is closed, the present invention is operated with two kinds of electricity generating principles of electromagnetic induction phenomenon and piezo-electric effect simultaneously, empty
Between Fabric utilization it is higher, can effectively collect the vibrational energy in environment, any fossil energy can not be consumed for low-power consumption
The microelectronic components such as microsensor are adopted and can and powered, and are a kind of environmentally friendly energy collecting devices.
Claims (7)
1. a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device, it is characterised in that：Including static mechanics and dynamic
State mechanism；
The static mechanics include box casing, and a middle side part is provided with bearing spider in casing, and relative opposite side middle part sets
There is one piece of fixed magnet of column；The internal side of shell top adjacent with fixed magnet is provided with least one upper coil, inside bottom
At least one lower coil is provided with, and at least one upper coil and at least one lower coil are corresponded to up and down；
The dynamic mechanism includes the pendulum frame of rectangular frame, and pendulum frame is by rotating shaft and the cooperation of bearing spider in casing；
The rotating shaft middle part is connected to the middle part of the spring leaf of V-arrangement or U-shaped, and spring leaf surface is provided with piezoelectric element；In its natural state,
One end of spring leaf is in contact with the inner side roof of casing just, and the other end is in contact with the inner side bottom wall of casing just；Pendulum frame
The other end be provided with least one column oscillator magnet, the oscillator magnet perpendicular to pendulum frame, at least one oscillator magnetic
The two ends of iron correspond at least one upper coil and at least one lower coil respectively；
Described at least one oscillator magnet and fixed magnet magnetizes vertically, and mutually exclusive；
During work, casing is fixed on into mechanical structure or building structure etc. can produce in the structure of vibration；
In the presence of extraneous vibrational excitation, the swing for putting frame drives axis of rotation, and then drives spring leaf and piezoelectric element to become
Shape simultaneously produces electric charge, and electric energy is exported by the electrode tip lead of piezoelectric element；On the other hand, the oscillator magnet on pendulum frame is upper and lower
While swing, the magnetic field around magnet is also moved therewith, and at least one upper coil and at least one lower coil exist
Cutting magnetic induction line and induced-current is produced in magnetic field, electric current is exported by wire.
2. a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device according to claim 1, its feature exists
In：The material of the casing is copper or aluminium；Be respectively equipped with insulating barrier on the inner side roof and inner side bottom wall of casing, so as to avoid with
Described at least one upper coil and the conducting of at least one lower coil.
3. a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device according to claim 1, its feature exists
In：The other end of the pendulum frame is provided with three oscillator magnet.
4. a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device according to claim 1 or 3, its feature
It is：The material of the pendulum frame is copper.
5. a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device according to claim 1, its feature exists
In：The material of the spring leaf is spring steel or elastic metallic.
6. a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device according to claim 1, its feature exists
In：The material of the fixed magnet and the material of oscillator magnet are Nd-Fe-B permanent magnet.
7. a kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device according to claim 1, its feature exists
In：The material of the piezoelectric element is Kynoar.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342707A (en) * | 2017-08-17 | 2017-11-10 | 浙江师范大学 | A kind of self-powered anemoscope |
| CN107395063A (en) * | 2017-09-13 | 2017-11-24 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Energy collecting device |
| CN107508493A (en) * | 2017-08-17 | 2017-12-22 | 浙江师范大学 | A kind of piezoelectricity windmill equipped with magnetic spring |
| CN107769611A (en) * | 2017-10-31 | 2018-03-06 | 长春工业大学 | Piezoelectricity electromagnetism combined wideband energy capture device based on Vehicle Suspension Vibration |
| CN109194086A (en) * | 2018-09-19 | 2019-01-11 | 大连理工大学 | A kind of combined type energy accumulator of non-linear magnetomechanical coupling |
| CN109306945A (en) * | 2018-10-18 | 2019-02-05 | 洛阳理工学院 | A kind of adjustable monoblock type raising frequency pendulum energy collection device of rigid sheet amount of bow |
| JP2019075846A (en) * | 2017-10-12 | 2019-05-16 | オムロン株式会社 | Mechanoelectric transducer, chair and cushion |
| CN110401326A (en) * | 2019-08-02 | 2019-11-01 | 南方电网科学研究院有限责任公司 | Cable energy collecting device |
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| CN107342707A (en) * | 2017-08-17 | 2017-11-10 | 浙江师范大学 | A kind of self-powered anemoscope |
| CN107508493A (en) * | 2017-08-17 | 2017-12-22 | 浙江师范大学 | A kind of piezoelectricity windmill equipped with magnetic spring |
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