CN108616228B - Culvert type piezoelectricity-Electromagnetic heating wideband electricity energy harvester - Google Patents
Culvert type piezoelectricity-Electromagnetic heating wideband electricity energy harvester Download PDFInfo
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- CN108616228B CN108616228B CN201810487114.1A CN201810487114A CN108616228B CN 108616228 B CN108616228 B CN 108616228B CN 201810487114 A CN201810487114 A CN 201810487114A CN 108616228 B CN108616228 B CN 108616228B
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- 230000005611 electricity Effects 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 title claims description 24
- 230000000694 effects Effects 0.000 claims abstract description 13
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 5
- 230000005284 excitation Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 2
- 230000000873 masking effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010358 mechanical oscillation Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 241001124569 Lycaenidae Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 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
- H02N2/188—Vibration harvesters adapted for resonant operation
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Abstract
The invention discloses a kind of wideband electricity energy harvester for combining piezoelectric support beam and floated EMR electromagnetic resonance unit, which can be fixed on bridge pavement acquisition road vibration energy or be mounted on acquisition upper air current energy on the bridge steelframe of high-altitude.Wherein floated EMR electromagnetic resonance unit can be used as the end load quality of piezoelectric support beam, the main road vibration energy that low-frequency range is collected using electromagnetic induction principle；Wherein piezoelectric support beam carries out fluid structurecoupling as thin beam structural body and external air flow and generates Flow vibration, and the resonance characteristic of piezoelectric support beam can be adjusted by the quality sliding block on piezoelectric support beam, middle and high frequency range Flow vibration energy is mainly collected by direct piezoelectric effect.
Description
Technical field
The present invention relates to a kind of more supporting beam piezoelectricity of culvert type-Electromagnetic heating wideband electricity energy harvesters, can be efficiently
The bridge floor vibration or high-speed flow for acquiring different frequency bands section cause vibrational energy, which can be for for bridge structural health monitoring
Wireless sensor node power supply.
Background technique
Monitoring structural health conditions refer to that the component working condition to buildings such as bridges, structure physical state carry out real-time monitoring.
With the continuous improvement of bridge span, for the real-time and comprehensive, quantity and installation position to sensor for guaranteeing monitoring data
Setting all there are certain requirements, and cause the replacement of later period sensor node battery and maintenance that can face larger difficulty.Energy acquisition technology
It can replace conventional batteries and solve power consumption wireless sensor powerup issue, promote the steady of bridge structure Health Wireless Monitoring System
Qualitative and working life.
Vibrational energy acquisition technique is broadly divided into three classes at present: electromagnetic type, piezoelectric type and electrostatic, wherein electromagnetic type and pressure
Electric-type uses relatively broad.Electromagnetic energy acquisition system structure is simple, output electric current is big but output voltage is low and working frequency range
It is lower；Piezoelectric type energy acquisition system output voltage is high, the easy of integration but internal resistance of source is big and working frequency range is higher.Longspan Bridge
The inducement of structural vibration is presented bridge caused by diversification, including the vibration of bridge floor caused by vehicle driving and high-altitude natural wind and draws
Suo Zhendong etc., at present the energy collecting system of single form that there are working bands is relatively narrow, can not adaptive different vibration environment,
The disadvantages of energy acquisition efficiency is lower.
Summary of the invention
It is suitable for acquisition bridge floor low-frequency vibration and upper air current cause high frequency the technical problems to be solved by the present invention are: providing
Piezoelectricity-Electromagnetic heating electricity energy harvester that the working band of vibration is wide, resonant-frequency adjustable, energy utilization efficiency are high.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of culvert type piezoelectricity-Electromagnetic heating wideband electricity energy harvester comprising:
Cavity cylinder, inner hollow have open end and mounting base, and are fixed to installation table by the mounting base
Face；
At least one floated electromagnetism acquisition module is supported on by one end of at least two piezoelectric support beams described respectively
In cavity cylinder, the other end of the piezoelectric support beam is fixed on the cavity inboard wall of cylinder, all floated electromagnetism acquisitions
The central axes of module are aligned with cavity cylinder central axes, when floated electromagnetism acquisition module there are two it is above when, be alternatively arranged.
Preferably, each piezoelectric support beam is equipped with the mass block that can be slided on piezoelectric support beam, to change pressure
The resonance frequency of electric supporting beam.
Preferably, at least two piezoelectric supports beam is symmetrically arranged relative to floated electromagnetism acquisition module.
Preferably, it includes described that at least two piezoelectric supports beam is symmetrically arranged relative to floated electromagnetism acquisition module
At least two piezoelectric support beams are surrounded floated electromagnetism acquisition module and are arranged in a manner of equal angles.
Preferably, the piezoelectric support beam of different floated electromagnetism acquisition modules is in cavity cylinder in the radial direction relative to that
This biasing, to reduce mutual masking of the piezoelectric support beam on cavity column axis direction, to make preceding layer piezoelectric support beam
The air-flow decaying at place will not excessively influence the fluid structurecoupling excitation of later layer piezoelectric support Liang Chu.
Preferably, at least two piezoelectric supports beam is four piezoelectric support beams, and adj acent piezoelectric supporting beam forms 90 degree
Angle.
Preferably, the open end is in horn-like.
Preferably, the floated electromagnetism acquisition module include EMR electromagnetic resonance shell, it is coil, upper fixed permanent magnet, removable
Dynamic permanent magnet, lower fixed permanent magnet, wherein upper fixed permanent magnet and lower fixed permanent magnet are separately fixed at EMR electromagnetic resonance shell two
End, coil setting move permanent magnet in the magnetic pole of upper fixed permanent magnet and lower fixed permanent magnet in EMR electromagnetic resonance shell middle section
It is suspended under mutual repulsion effect in EMR electromagnetic resonance shell, is moved in coil when by external force.
Preferably, the cavity cylinder is cylinder.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
1) the energy acquisition scheme of piezoelectricity and Electromagnetic heating formula, effective use frequency domain model from several hertz to several hundred hertz are used
Interior mechanical oscillation are enclosed, energy acquisition efficiency is improved；2) design feature of science of bridge building is combined, proposing can efficiently use
Bridge floor low-frequency vibration and upper air current cause the combined type cavity design of high-frequency vibration；3) internal to use floated EMR electromagnetic resonance list
Member reduces frictional dissipation when vibration and noise；4) the resettlement effect sliding block on piezoelectric support beam, by changing supporting beam
Mass Distribution changes the resonance frequency of entire electricity energy harvester, preferably carries out from the Flow vibration under different wind friction velocities
Energy coupling；5) it is offset each other arrangement design using multiple field piezoelectric beam, the reasonable distribution Mass Distribution of whole device, simultaneously
Also multiple utilization has been carried out to the high-speed flow for entering cavity.
Detailed description of the invention
Fig. 1 is the energy of culvert type piezoelectricity of the invention-Electromagnetic heating wideband electricity energy harvester different installation
Acquire flow graph；
Fig. 2 is culvert type piezoelectricity of the invention-Electromagnetic heating wideband electricity energy harvester perspective view；
Fig. 3 is culvert type piezoelectricity of the invention-Electromagnetic heating wideband electricity energy harvester partial sectional view；
Fig. 4 is culvert type piezoelectricity of the invention-Electromagnetic heating wideband electricity energy harvester top view；
Fig. 5 is culvert type piezoelectricity of the invention-Electromagnetic heating wideband electricity energy harvester bottom view；
Fig. 6 is the structural schematic diagram of floated electromagnetism acquisition module of the invention；
Fig. 7 is a kind of signal of mounting means of culvert type piezoelectricity of the invention-Electromagnetic heating wideband electricity energy harvester
Figure；
Fig. 8 is showing for another mounting means of culvert type piezoelectricity of the invention-Electromagnetic heating wideband electricity energy harvester
It is intended to.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawings and detailed description, the example of the embodiment
It is shown in the accompanying drawings, is exemplary below with reference to the embodiment of attached drawing description, for explaining only the invention, and cannot
It is construed to limitation of the present invention.
Fig. 2 and Fig. 3 diagram support beam type piezoelectric-Electromagnetic heating wideband electricity energy harvester comprising the cavity with pedestal
Cylinder 2, piezoelectric support beam 3, the slidably parts such as mass block 4, floated EMR electromagnetic resonance unit 5.Four 3 one end of piezoelectric support beam
It is fixed on 2 inner wall of cavity cylinder, the other end and the connection of floated EMR electromagnetic resonance unit 5, slidably mass block 4 is nested in piezoelectricity
And can be free to slide in supporting beam, floated EMR electromagnetic resonance unit 5 can be equivalent to fixed mass block, and when vibration drives supporting beam
On piezoelectric bimorph, itself can also pass through electromagnetic induction effect collecting energy.When being generated vibration by dynamic excitation, pressure
Electrical twining piece is mainly used for acquiring medium-high frequency energy, and EMR electromagnetic resonance unit is mainly used for acquiring low frequency energy, thus realization device
Wideband energy acquisition.Piezoelectric support beam uses the piezoelectric bimorph of four parallel outputs, is nested in piezoelectric bimorph support
Slidably mass block 4 on beam can adjust its position being located on piezoelectric support beam according to actual vibration situation, to change
The Mass Distribution of piezoelectric support beam plays the effect for adjusting piezoelectric support beam resonant frequency.
The structure of floated EMR electromagnetic resonance unit is as shown in fig. 6, include EMR electromagnetic resonance shell 51, coil, upper fixed permanent magnetism
Body 53, removable permanent magnet 54, lower fixed permanent magnet 55, wherein upper fixed permanent magnet 53 and lower fixed permanent magnet 55 are solid respectively
51 both ends of EMR electromagnetic resonance shell are scheduled on, in 51 middle section of EMR electromagnetic resonance shell, the EMR electromagnetic resonance unit is mutual using magnetic pole for coil setting
The method of reprimand replaces spring structure using the repulsion between magnet, and removable permanent magnet 54 is made to be suspended in EMR electromagnetic resonance shell 51
In, it avoids spring fatigue bring from being lost, improves system reliability；Changing magnet model just can be changed magnetic in EMR electromagnetic resonance unit
The magnet of different model can be selected to improve collecting efficiency in the direct repulsion of body and stiffness coefficient.
In embodiment as shown in Figure 4 and Figure 5, each floated EMR electromagnetic resonance unit is furnished with four piezoelectric support beams 3,
Angle is 90 degree between piezoelectric support beam, and however, the present invention is not limited thereto, as long as being able to maintain stable structure, it is can be used in the present invention
The piezoelectric support beam and angle of its number can be different.
In embodiment, entire piezoelectricity-Electromagnetic heating wideband electricity energy harvester shape is culvert type cavity cylindrical body knot
Structure, open end have a horn-like collection air port 6, the other end be with screw hole can firm banking 7, as shown in Figure 4 and Figure 5,
In order to improve the energy conversion efficiency by duct interior air-flow, designed using two-layer equation.As shown, two layers of piezoelectric support beam 3
Layout angle differ 45 degree, when high-speed flow from collection air port enter impact first layer piezoelectric support beam generation high-frequency vibration after,
The speed of intracavitary air-flow reduces and the contact of second layer piezoelectric support beam, utilizes residual vaporous stream energy again.Certainly, in duct
Also two layers or more piezoelectric support beam 3 and floated EMR electromagnetic resonance unit 5 can be used.Moreover, each offset angle for being laminated electric supporting beam 3
Degree may differ from 45 degree, as long as can guarantee that the stream for the piezoelectric support beam that one layer of air-flow decaying will not excessively influence succeeding layer consolidates coupling
Close excitation.
, can be there are two types of mounting means according to the difference of collecting energy target, mounting means (1): when needing to acquire with bridge
When energy based on the low-frequency vibration of face, can by can firm banking be riveted on bridge floor (as shown in Figure 7), when vehicle is through passing a bridge
When face, low-frequency vibration is transmitted in piezoelectric support beam and floated EMR electromagnetic resonance unit by pedestal, by piezoelectric effect with
And vibrational energy is converted into mechanical energy by electromagnetic induction effect (main acquisition mode)；Mounting means (2): when needs are acquired with high outage
When high-frequency energy based on fast air-flow, which can be mounted on to (such as Fig. 8 on high-altitude bridge steelframe or drag-line
It is shown), will collection tuyere line towards air-flow come to, when enter cavity gas shock piezoelectric support beam when, can produce upper frequency
Mechanical oscillation, electric energy is converted mechanical energy by piezoelectric effect (main acquisition mode) and electromagnetic induction effect.
Bridge has vehicle to pass through or when external air flow acts on acquisition device, and when piezoelectric support beam can generate difference
The vibration of frequency range, generated low frequency energy are collected by electromagnetic unit in acquisition device, vibrate the high-frequency energy of generation
It is then collected by piezoelectric support beam, to realize wideband energy acquisition；Nested slidably mass block can on piezoelectric support beam
Position is adjusted according to practical extraneous vibration, to change the resonance frequency of device, improves collecting efficiency, the energy of different installation
Amount acquisition flow graph is as shown in Figure 1.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (9)
1. a kind of culvert type piezoelectricity-Electromagnetic heating wideband electricity energy harvester characterized by comprising
Cavity cylinder, inner hollow have open end and mounting base, and are fixed to mounting surface by the mounting base；Extremely
A few floated electromagnetism acquisition module, is supported on the cavity cylinder by one end of at least two piezoelectric support beams respectively
Interior, the other end of the piezoelectric support beam is fixed on the cavity inboard wall of cylinder, in all floated electromagnetism acquisition modules
Axis is aligned with cavity cylinder central axes, when floated electromagnetism acquisition module there are two it is above when, be alternatively arranged；
The electricity energy harvester further include: slidably mass block and piezoelectric bimorph, slidably mass block is nested in piezoelectricity branch
It supports on beam and can be free to slide, floated electromagnetism acquisition module is equivalent to fixed mass block, when vibration in drive supporting beam
Piezoelectric bimorph, itself can also pass through electromagnetic induction effect collecting energy；When being generated vibration by dynamic excitation, piezoelectricity is double
Chip is for acquiring medium-high frequency energy, and EMR electromagnetic resonance unit is for acquiring low frequency energy, so that the wideband energy of realization device is adopted
Collection；Piezoelectric support beam uses the piezoelectric bimorph of four parallel outputs, is nested in piezoelectric bimorph supporting beam slidably
Mass block can adjust its position being located on piezoelectric support beam according to actual vibration situation, to change the matter of piezoelectric support beam
Amount distribution, plays the effect for adjusting piezoelectric support beam resonant frequency.
2. culvert type piezoelectricity according to claim 1-Electromagnetic heating wideband electricity energy harvester, which is characterized in that each
Piezoelectric support beam is equipped with the mass block that can be slided on piezoelectric support beam, to change the resonance frequency of piezoelectric support beam.
3. culvert type piezoelectricity according to claim 1-Electromagnetic heating wideband electricity energy harvester, which is characterized in that described
At least two piezoelectric support beams are symmetrically arranged relative to floated electromagnetism acquisition module.
4. culvert type piezoelectricity according to claim 3-Electromagnetic heating wideband electricity energy harvester, which is characterized in that described
It includes at least two piezoelectric supports beam that at least two piezoelectric support beams are symmetrically arranged relative to floated electromagnetism acquisition module
It is arranged in a manner of equal angles around floated electromagnetism acquisition module.
5. culvert type piezoelectricity according to claim 1-Electromagnetic heating wideband electricity energy harvester, which is characterized in that different
The piezoelectric support beam of floated electromagnetism acquisition module biases relative to each other in the radial direction in cavity cylinder, to reduce piezoelectricity branch
Support mutual masking of the beam on cavity column axis direction.
6. culvert type piezoelectricity according to claim 1-Electromagnetic heating wideband electricity energy harvester, which is characterized in that described
At least two piezoelectric support beams are four piezoelectric support beams, and adj acent piezoelectric supporting beam forms 90 degree of angles.
7. culvert type piezoelectricity according to claim 1-Electromagnetic heating wideband electricity energy harvester, which is characterized in that described
Open end is in horn-like.
8. culvert type piezoelectricity according to claim 1-Electromagnetic heating wideband electricity energy harvester, which is characterized in that described
Floated electromagnetism acquisition module includes EMR electromagnetic resonance shell, coil, upper fixed permanent magnet, removable permanent magnet and lower fixed permanent magnetism
Body, wherein upper fixed permanent magnet and lower fixed permanent magnet are separately fixed at EMR electromagnetic resonance shell both ends, coil setting is humorous in electromagnetism
Shake shell middle section, and removable permanent magnet is suspended in electromagnetism under the magnetic pole mutual repulsion effect of upper fixed permanent magnet and lower fixed permanent magnet
In resonance shell, moved in coil when by external force.
9. culvert type piezoelectricity according to claim 1-Electromagnetic heating wideband electricity energy harvester, which is characterized in that described
Cavity cylinder is cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN109995215A (en) * | 2019-04-19 | 2019-07-09 | 西安工业大学 | Piezoelectricity and electromagnetic coupling vibrating sensor |
| CN110380645B (en) * | 2019-07-22 | 2021-09-24 | 哈尔滨工业大学 | Modular directional flow pipeline type circumferential array arranged piezoelectric energy harvester |
| CN110661445B (en) * | 2019-09-12 | 2022-07-26 | 重庆邮电大学 | Parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism and excitation method thereof |
| CN110985322A (en) * | 2020-01-02 | 2020-04-10 | 广州大学 | Wake flow galloping power generation device |
| CN111564945B (en) * | 2020-06-15 | 2022-08-02 | 河南工业大学 | Combined type vibration energy collector |
| CN112491297B (en) * | 2020-11-23 | 2021-09-07 | 杭州电子科技大学 | Piezoelectric-electromagnetic coupling energy collection device and method based on wind-induced vibration |
| CN112311278A (en) * | 2020-11-27 | 2021-02-02 | 安徽理工大学 | Piezoelectric-magnetoelectric combined aeroelastic vibration energy harvesting device |
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| KR20090077095A (en) * | 2008-01-10 | 2009-07-15 | 문수민 | Free electricity three |
| CN202634319U (en) * | 2012-06-14 | 2012-12-26 | 广州市番禺奥迪威电子有限公司 | Wind tunnel type piezoelectric generator |
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