CN103066884B - Self-tuning formula frequency conversion micro-power generators and method - Google Patents
Self-tuning formula frequency conversion micro-power generators and method Download PDFInfo
- Publication number
- CN103066884B CN103066884B CN201210564859.6A CN201210564859A CN103066884B CN 103066884 B CN103066884 B CN 103066884B CN 201210564859 A CN201210564859 A CN 201210564859A CN 103066884 B CN103066884 B CN 103066884B
- Authority
- CN
- China
- Prior art keywords
- piezoelectric
- self
- sliding block
- power generators
- guide rail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The present invention relates to a kind of self-tuning formula frequency conversion micro-power generators and method, it is mainly used in vibrating the collection of energy of working environment.It is made up of guide rail, sliding block, piezoelectric vibrator, mass, fixing device, vibrates to collect energy by the piezoelectric vibrator on device.The device changes the span of system by movement of the sliding block on guide rail, reach on a large scale, the purpose of high accuracy adjusting means resonant frequency, the TRT is suitable for different working environments in larger frequency range.This self-tuning frequency conversion micro-power generators can be combined with the sensor of motion sensitive application, there is provided self-powered monitoring capability.
Description
Technical field
The present invention relates to the compact apparatus of vibrational energy collection and method application in environment, it is particularly suited for working frequency
The environmental energy for changing greatly is collected, and is suitable for integrated with sensor application.
Background technology
Sensor network technique has a wide range of applications as a kind of emerging monitoring technology in production and living.For
Sensor network, especially radio sensing network, energy supply influence very big on it, general to be powered using battery.But engineering
Middle wireless sensor network node is usually due to monitoring position reason, and the replacing of battery is sometimes extremely difficult, and the use of battery
Restricted lifetime.Therefore, in order to realize the permanently effective work of whole sensor network, prolonging wireless sensor network application longevity
Life and reduces cost, for wireless sensor network provides enough, long-term energy firstly the need of facing.Effective method
It is the energy in collecting sensor network surrounding environment, and wireless sensor network offer energy is provided.
There is the mechanical vibrational energy of many forms in the use occasion of wireless sensor network, by the use of piezoelectric as
The function element of " energy acquisition ", can be converted to electric energy by the mechanical vibrational energy in environment, realize vibrational energy harvesting to replace
Generation traditional energy-provision way, for the work of wireless sensor network provides the energy.
Piezoelectric energy collects general using piezoelectric vibrator structure, when external excited frequency is equal to the intrinsic frequency of piezoelectric vibrator
When, i.e., when in resonant condition, piezoelectric produces maximum distortion, and generating effect is optimal, and output voltage or the quantity of electric charge are maximum.So
And in actual application environment, ambient vibration, if mechanical equipment vibration is often change, i.e., external working frequency be with when
Between be to change, there are problems that piezoelectric vibrator intrinsic frequency and external excited frequency are in disresonance.Piezoelectric is for frequency
Change it is very sensitive, even if extraneous frequency differs smaller with piezoelectric vibrator intrinsic frequency, its deformation will reduce rapidly, generating energy
Power is reduced rapidly.Common piezoelectric energy collecting device is due to structure, and its frequency range is smaller, it is difficult to adapt to outer
Boundary's environmental change.
Accordingly, it would be desirable to design a kind of microminiature piezoelectric energy collecting device of resonant-frequency adjustable, the device has larger
Frequency-tuning range, can adapt to different working environments, under different operating conditions can resonance, realize collection of energy
Maximization.The device can provide the energy with follow-up sensor integration, treated electric energy for sensor node, realize passing
The self power generation of sensor node.
The content of the invention
It is an object of the invention to provide a kind of self-tuning formula frequency conversion micro-power generators, by the mechanical vibrational energy conversion in environment
It is electric energy, realizes vibrational energy harvesting to substitute traditional energy-provision way, for the work of wireless sensor network provides the energy.
Self-tuning formula frequency conversion micro-power generators of the invention are made up of converter plant, TRT, the part of fixing device three.
Wherein, converter plant includes guide rail, fixed sliding block, movable slider.The effect of guide rail is the slip for carrying sliding block, can
To be designed as straight trough or dovetail groove.Equipped with fixed sliding block and movable slider on guide rail, sliding block is hinged with two piezoelectric vibrator one end, and two
The piezoelectric vibrator other end is hinged, it is therefore an objective to piezoelectric vibrator is moved with sliding block.Mass is arranged on two piezoelectricity
The position that oscillator is hinged.
TRT is two piezoelectric vibrators, and the piezoelectric vibrator is made up of piezoelectric layer with neutral line.Neutral line is used can
Conductive sheet metal, such as bronze thin plate；Piezoelectric layer is piezoelectric monocrystal, piezoelectric ceramics, lead zirconate titanate or composite piezoelectric material
PVDF thin film, is distributed in sheet metal upper and lower end face, can be one or more layers.Between piezoelectric layer and piezoelectric layer, piezoelectric layer with
Pass through conductive adhesive between sheet metal.
Fixing device is various informative, the purpose is to device is fixed on vibrating mechanism, is vibrated together with external agency, from
And obtain exciting force.Set forth below is a kind of fixed form of preferred structure of the invention.
The guide rail, sliding block, mass, the material of fixing device can use rigid plastics, aluminium or stainless steel, according to
Working environment frequency is just selected.
Beneficial effect：The vibration of working environment drives the vibration of micro-power generators, and piezoelectric patches produces electricity under stress
Lotus, realizes the conversion of mechanical energy and electric energy, is processed through subsequent conditioning circuit, you can for sensor node is powered.Sliding block is on guide rail
Motion, can change two piezoelectric vibrator end points spans, and then change device rigidity, intrinsic frequency.The accurate adjustment of span ensures
Intrinsic frequency can realize the optimization of generating capacity under Frequency condition of work in interior change in a big way.
The content of the invention
It is an object of the invention to provide a kind of self-tuning formula frequency conversion micro-power generators, by the mechanical vibrational energy conversion in environment
It is electric energy, realizes vibrational energy harvesting to substitute traditional energy-provision way, for the work of wireless sensor network provides the energy.
Self-tuning frequency conversion micro-power generators of the invention are made up of guide rail, sliding block, piezoelectric vibrator, mass, fixing device.
The present apparatus is fixed together by fixing device with external agency, realizes common vibration.The effect of guide rail is the cunning for carrying sliding block
It is dynamic, can be designed as straight trough or dovetail groove.Cut with scissors equipped with fixed sliding block and movable slider, sliding block and two piezoelectric vibrator one end on guide rail
Connect, the two piezoelectric vibrator other ends are hinged, it is therefore an objective to piezoelectric vibrator is moved with sliding block.Mass is arranged on and two
The symmetrical two ends of folding that individual piezoelectric vibrator is hinged.
The piezoelectric vibrator is made up of piezoelectric layer with neutral line.Neutral line uses conductive sheet metal, and such as bronze is thin
Plate；Piezoelectric layer is piezoelectric monocrystal, piezoelectric ceramics, lead zirconate titanate or composite piezoelectric material PVDF thin film, is distributed on sheet metal
Lower surface, can be one or more layers.By conductive gluing between piezoelectric layer and piezoelectric layer, between piezoelectric layer and sheet metal
Connect.
The guide rail, sliding block, mass, the material of fixing device can use rigid plastics, aluminium or stainless steel, according to
Working environment frequency is just selected.
Beneficial effect：The vibration of working environment drives the vibration of micro-power generators, and piezoelectric patches produces electricity under stress
Lotus, realizes the conversion of mechanical energy and electric energy, is processed through subsequent conditioning circuit, you can for sensor node is powered.Sliding block is on guide rail
Motion, can change two piezoelectric vibrator end points spans, and then change system stiffness, so as to accurately change device intrinsic frequency.Across
Away from accurate adjustment ensure that intrinsic frequency can realize generating capacity under Frequency condition of work in interior change in a big way
Optimize.
Brief description of the drawings
Fig. 1：Self-tuning formula frequency conversion micro-power generators view.
Specific embodiment
Below in conjunction with the accompanying drawings 1, the invention will be further described.It is emphasized that explanation below is only exemplary,
Rather than in order to limit the scope of the present invention and application.
This self-tuning formula frequency conversion micro-power generators are by guide rail（1）, movable slider（2）, fixed sliding block（5）, folding（7,10,
13）, piezoelectric vibrator（8,12）, mass（9,11）, base（6）, angle steel（3）, screw（14）, bolt（4）Composition.Angle steel（3）
Positioned at rail back, with base（6）And guide rail（1）By bolt（4）Connection, plays support fixation.Movable slider（2）Can be
Guide rail（1）On slidably, during regulation pass through screw（14）Guide rail can be fixed in（1）On.Fixed sliding block（5）By bonding
Agent and guide rail（1）It is fixed together.Base（6）Two screwed holes of frontal design, angle steel（3）By bolt（4）With base (6) and
Workbench in actual environment is fixed, and plays support meanss.Piezoelectric vibrator（8）With piezoelectric vibrator（12）By folding
（10）It is hinged, piezoelectric vibrator（8）The other end passes through folding（7）With fixed sliding block（5）It is hinged, piezoelectric vibrator（12）Left end is by folding
Page（13）With fixed sliding block（2）It is hinged.Mass（9,11）It is symmetrically mounted on folding（10）Two ends.
Piezoelectric vibrator（8）With（12）It is identical structure, intermediate layer is conductive sheet metal, and upper and lower piezoelectric patches passes through
Conducting resinl is Nian Jie with intermediate layer.Metallic intermediate layer thin plate is processed using beryllium-bronze material, and the piezoelectric patches of piezoelectric layer is used
PZT-5H or other piezoelectrics.Two piezoelectric patches need longitudinal polarization, and polarised direction conversely, upper and lower piezoelectric patches is drawn lead respectively
Line electrode.
It is lifting generating capacity, can be in piezoelectric vibrator（8,12）Intermediate layer up and down respectively paste multi-layer piezoelectric piece, shake
Multi-layer piezoelectric piece deformation when dynamic, produces the quantity of electric charge to increase, generating capacity increase.
Guide rail, sliding block, folding, the material of mass use rigid plastics, aluminium or stainless steel, according to working environment frequency
Height is selected.The general Material texture for using is softer, lighter weight when, device intrinsic frequency can be reduced.
The course of work：When TRT works, movable slider（2）By screw（14）Tightening.The vibration of working environment makes
The adjoint vibration of whole device, due to mass（9,11）Motion, piezoelectric patches can produce tension and compression deformation, piezoelectric layer aggregation electric charge,
Potential is produced, the conversion of energy is realized.Any time upper and lower two panels piezoelectric vibrator（8,12）Tension and compression deformation is in opposite direction, is differential
Decline electrification structure.
Micro-power generators variable frequency adjustment mode：Unclamp holding screw（14）, make movable slider（2）In guide rail（1）Upper movement
Certain displacement, that is, change two piezoelectric vibrators（8,12）Span, this kind of method can change device rigidity, so as to accurately change dress
Intrinsic frequency is put, makes the intrinsic frequency of micro-power generators consistent with the frequency of working environment, system resonance, generating capacity enhancing.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.It is any to change system resonance frequencies by changing span, realize micro- generating
Invention should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection of claim
Scope is defined.
Claims (4)
1. self-tuning frequency conversion micro-power generators, it is characterised in that：It is by guide rail, sliding block, piezoelectric vibrator, mass, fixing device
Constitute；
With external agency be fixed together the present apparatus by fixing device, realizes common vibration；
Fixed sliding block and movable slider are installed, two piezoelectric vibrator one end are hinged with fixed sliding block, movable slider respectively on guide rail,
The two piezoelectric vibrator other ends are hinged, it is therefore an objective to piezoelectric vibrator is moved with sliding block；
The symmetrical two ends of folding that mass is arranged on and two piezoelectric vibrators are hinged.
2. self-tuning frequency conversion micro-power generators according to claim 1, it is characterised in that：The piezoelectric vibrator is by piezoelectric layer
Constituted with neutral line；
Neutral line uses conductive sheet metal；Piezoelectric layer is piezoelectric monocrystal, piezoelectric ceramics, lead zirconate titanate or composite piezoelectric material
Material PVDF thin film, is distributed in sheet metal upper and lower end face, can be one or more layers；Between piezoelectric layer and piezoelectric layer, piezoelectric layer with
Pass through conductive adhesive between sheet metal.
3. self-tuning frequency conversion micro-power generators according to claim 1, it is characterised in that：The guide rail, sliding block, quality
Block, the material of fixing device use rigid plastics, aluminium or stainless steel, are selected according to working environment frequency height.
4. the conversion method of self-tuning frequency conversion micro-power generators according to claim 1, it is characterised in that：Unclamp clamp screw
Nail, makes movable slider mobile certain displacement on guide rail, that is, change the span of two piezoelectric vibrators, so as to whole device can be changed
Intrinsic frequency, to reach and external environment vibration frequency resonance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210564859.6A CN103066884B (en) | 2012-12-24 | 2012-12-24 | Self-tuning formula frequency conversion micro-power generators and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210564859.6A CN103066884B (en) | 2012-12-24 | 2012-12-24 | Self-tuning formula frequency conversion micro-power generators and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103066884A CN103066884A (en) | 2013-04-24 |
| CN103066884B true CN103066884B (en) | 2017-06-09 |
Family
ID=48109375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210564859.6A Expired - Fee Related CN103066884B (en) | 2012-12-24 | 2012-12-24 | Self-tuning formula frequency conversion micro-power generators and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103066884B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160571B (en) * | 2016-06-20 | 2018-05-22 | 重庆大学 | Multi-direction broad-band piezoelectricity oscillating generating set |
| CN106899233B (en) * | 2017-04-14 | 2018-10-02 | 合肥工业大学 | A kind of Reed type bistable electromagnetic Piezoelectric anisotropy energy collecting device |
| CN109713770A (en) * | 2019-01-29 | 2019-05-03 | 上海交通大学 | Circuit is managed using the faint energy acquisition of high q-factor piezo-electric resonator |
| CN112030616B (en) * | 2020-07-21 | 2021-08-24 | 中南大学 | Vibration reduction power generation sleeper based on resonance principle |
| CN114070129B (en) * | 2021-11-18 | 2023-06-23 | 郑州大学 | Rotary-driven composite energy capture device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684550A (en) * | 2012-05-09 | 2012-09-19 | 南京航空航天大学 | Y-type composite vibration generator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7692365B2 (en) * | 2005-11-23 | 2010-04-06 | Microstrain, Inc. | Slotted beam piezoelectric composite |
| DE102008033048A1 (en) * | 2008-07-14 | 2010-02-04 | Abb Technology Ag | Field device of a process automation system with a device for the local production of electrical energy |
| CN101895232A (en) * | 2010-08-06 | 2010-11-24 | 武汉钢铁(集团)公司 | Piezoelectric energy harvester with elastic element linkage |
| FR2971650B1 (en) * | 2011-02-11 | 2013-02-22 | Commissariat Energie Atomique | MECHANICAL ENERGY CONVERSION DIDSPOSITIVE IN OPTIMIZED ELECTRICITY |
-
2012
- 2012-12-24 CN CN201210564859.6A patent/CN103066884B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684550A (en) * | 2012-05-09 | 2012-09-19 | 南京航空航天大学 | Y-type composite vibration generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103066884A (en) | 2013-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103066884B (en) | Self-tuning formula frequency conversion micro-power generators and method | |
| CN103023377B (en) | Piezoelectric and electromagnetic hybrid variable-frequency micro-power generation assembly and method for same | |
| Yang et al. | High-efficiency compressive-mode energy harvester enhanced by a multi-stage force amplification mechanism | |
| CN102013837B (en) | Dandelion-like multi-directional broadband piezoelectric vibration energy collection device | |
| CN202385032U (en) | Cantilever piezoelectric generator with adjustable fundamental frequency resonant frequency | |
| US8866316B2 (en) | Tunable vibration energy harvester and method | |
| CN102412757A (en) | Cantilever-type piezoelectric generator with adjustable base frequency resonant frequency | |
| CN103595295B (en) | Magnetic/piezoelectric broadband vibration energy collector | |
| CN103414379B (en) | Based on the piezoelectric energy gatherer of linear resonator and non-linear vibration generator | |
| Ramírez et al. | A multi-modal energy harvesting device for low-frequency vibrations | |
| JP2010051945A (en) | Resonance frequency-adjustable apparatus for collecting piezoelectric vibration energy | |
| CN103235200B (en) | Dynamic resonance method for measuring piezoelectric coefficient d15 of piezoelectric material | |
| CN104011889A (en) | Piezoelectric energy harvesting device or actuator | |
| CN103560640A (en) | Magneto-electricity/electromagnetic compound type low-frequency wideband vibration energy collector | |
| CN108023502A (en) | A kind of beam type negative stiffness device for collecting piezoelectric vibration energy | |
| EP2610935A1 (en) | An energy harvesting device | |
| CN102751910B (en) | Up-conversion vibration energy collecting device suitable for collecting low-frequency vibration energy | |
| Ren et al. | Piezoelectric energy harvesting based on shear mode 0.71 Pb (Mg 1/3 Nb 2/3) O 3-0.29 PbTiO 3 single crystals | |
| Nyamayoka et al. | Design of a prototype generator based on piezoelectric power generation for vibration energy harvesting | |
| CN105515442B (en) | A kind of mortar type piezoelectric harvester | |
| Çetin et al. | A flexible piezoelectric energy harvesting system for broadband and low-frequency vibrations | |
| Ramadoss et al. | Human vibration energy harvester with PZT | |
| Alameh et al. | Study and design of mems cross-shaped piezoelectric vibration energy harvesters | |
| Neha et al. | Design and analysis of piezoelectric cantilever based vibration energy harvester for low power devices | |
| CN112865600B (en) | Broadband three-dimensional piezoelectric vibration energy collecting array structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170609 Termination date: 20171224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |