CN109428509A - A kind of micro-strip energy harvester and wideband fluid energy collector - Google Patents
A kind of micro-strip energy harvester and wideband fluid energy collector Download PDFInfo
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- CN109428509A CN109428509A CN201710742796.1A CN201710742796A CN109428509A CN 109428509 A CN109428509 A CN 109428509A CN 201710742796 A CN201710742796 A CN 201710742796A CN 109428509 A CN109428509 A CN 109428509A
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- 239000012530 fluid Substances 0.000 title claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 6
- 230000008676 import Effects 0.000 claims abstract description 5
- 239000010408 film Substances 0.000 claims description 28
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- 229910017083 AlN Inorganic materials 0.000 claims description 9
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 7
- 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 claims description 6
- 239000011787 zinc oxide Substances 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 5
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 229910052706 scandium Inorganic materials 0.000 claims description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 3
- 229960001296 zinc oxide Drugs 0.000 claims description 3
- 241001124569 Lycaenidae Species 0.000 abstract 1
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Classifications
-
- 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
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a kind of micro-strip energy harvesters, including fluid inlet, nozzle, bluff body, microlaser cavity, micro-strip and fluid outlet；The fluid inlet is respectively communicated with the import in external and the nozzle, and the outlet of the nozzle is in the microlaser cavity；The bluff body is located at position corresponding with the outlet of the nozzle inside microlaser cavity, generates flutter when fluid enters microlaser cavity by nozzle and has an effect with bluff body；The micro-strip is located in microlaser cavity, is located at the side in the direction that bluff body is flowed along fluid and keeps the distance of setting therewith；The fluid outlet is connected to the inside and outside of the microlaser cavity；The micro-strip is piezoelectricity film material with function.The flow velocity of fluid is improved by using nozzle, so that reducing fluid energy collects difficulty, bluff body is added by the entrance in microlaser cavity, so that intracavitary fluid generates whirlpool, driving piezoelectricity film material with function, deformation occurs, produces electricl energy.
Description
Technical field
The present invention relates to energy collection technology fields, and in particular to a kind of micro-strip energy harvester and wideband fluid energy are received
Storage.
Background technique
With the development of science and technology, the improvement of people's living standards and the support energetically of country, Internet of Things achieve greatly
Development, also become each colleges and universities, research institution and company research hot spot.Wherein, wireless sensor network (WSN) is Internet of Things
Key provides the information of substance for Internet of Things.The sensor node of wireless sensor network has the characteristics that quantity is big, small in size,
Need energy supply module that is small-sized, persistently energizing.And the MEMS of (Energy Harvesting) is collected based on environmental energy
Micro- energy theoretically, can provide inexhaustible energy for wireless sensor node, therefore either academia is still
Industry all produces great interest to the confession power technology based on micro-nano collection of energy.
In addition, vibrational energy is a kind of energy most generally existing in nature, the mode of collection includes piezoelectric type, electromagnetism
Formula is electrostatic etc..Piezoelectric type energy collector generally uses cantilever beam structure, compared with the acquisition mode of other modes, has phase
The advantages that when simple structure, energy density is high, and the production of micromechanics (MEMS) processing technology can be used, becomes collection of energy in recent years
The hot spot in device field.
All there is some disadvantages for the current vibrational energy collector for being mostly based on piezoelectric effect: (1) ready-made at present
Output voltage/power of piezoelectric energy collector is too low, it is difficult to meet the requirement of energy stores and driving element;(2) work belt
Width is relatively narrow, can only very a small range just has larger output near resonant frequency.Based on this, some patents also proposed some solutions
Certainly method.Such as Chinese patent CN103647475A(publication date: 2014.03.19) it is deformed using tip with Basement collision, from
And piezoelectric patches is driven to deform, and then the mode for generating charge carries out collection of energy.The tip of the collector need to be sent out with substrate
Raw collision, tip strength is originally smaller, and multiple impacts will lead to damage.Chinese patent CN105262371A(publication date: 2016-
Frequency range 01-20) is widened using the collector unit array of different parameters structure.Each receipts of the energy harvester of which
It is different to collect unit resonance frequency, therefore no matter works in which frequency, other energy collection units are due to vibration in array
Frequency be not its resonance frequency and in working condition is stagnated, so the general work efficiency of the energy harvester is lower.
Summary of the invention
In view of the deficiencies of the prior art, the present invention is intended to provide a kind of micro-strip energy harvester and wideband fluid energy are collected
Device improves the flow velocity of fluid by using pointed nozzle, so that reducing fluid energy collects difficulty；Additionally by microlaser cavity
Entrance add bluff body so that intracavitary fluid generates whirlpool, driving piezoelectricity film material with function, deformation occurs, generates
Electric energy.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of micro-strip energy harvester, including fluid inlet, nozzle, bluff body, microlaser cavity, micro-strip and fluid outlet；The stream
Body import is respectively communicated with the import in external and the nozzle, and the outlet of the nozzle is in the microlaser cavity；The choked flow
Body is located at position corresponding with the outlet of the nozzle inside microlaser cavity, when fluid enters microlaser cavity and and bluff body by nozzle
Flutter is generated when having an effect；The micro-strip is located in microlaser cavity, is located at the side in the direction that bluff body is flowed along fluid
And the distance of setting is kept therewith；The fluid outlet is connected to the inside and outside of the microlaser cavity；The micro-strip is piezoelectricity
Film material with function.
Further, the micro-strip is piezoelectricity film material with function, using PZT thin film PZT, aluminium nitride film
AlN, zinc-oxide film ZnO, aluminium nitride scandium film ScxAl1-xN, PVDF thin film, PVDF-TrFE film or PDMS film etc..
Further, the nozzle is sharp mouth nozzle.
A kind of wideband fluid energy collector with above-mentioned micro-strip energy harvester, including it is force transmission mechanism, fluid cavity, micro-
Band energy harvester and fluid line, the fluid inlet of the micro-strip energy harvester are connected to the fluid by fluid line
Chamber, the force transmission mechanism are used to apply pressure to the fluid cavity.
It further, further include having pedestal, the micro-strip energy harvester is set on the pedestal.
The beneficial effects of the present invention are: the flow velocity of fluid is improved by using nozzle, is received so that reducing fluid energy
Collect difficulty, bluff body is added by the entrance in microlaser cavity, so that intracavitary fluid generates whirlpool, drives piezoelectricity function thin
Deformation occurs for membrane material, produces electricl energy.
Detailed description of the invention
Fig. 1 is the overall structure diagram of micro-strip energy harvester of the present invention；
Fig. 2 is the concrete structure schematic diagram of microlaser cavity；
Fig. 3 is the overall structure diagram of wideband fluid energy collector of the present invention；
Fig. 4 is the relational graph of air velocity and piezoelectricity film material with function vibration frequency and damped coefficient.
Specific embodiment
Below with reference to attached drawing, the invention will be further described, it should be noted that the present embodiment is with this technology side
Premised on case, the detailed implementation method and specific operation process are given, but the scope of the present invention is not limited to the present embodiment.
As shown in Figs. 1-2, a kind of micro-strip energy harvester, including it is fluid inlet 1, nozzle 2, bluff body 3, microlaser cavity 4, micro-
Band 6 and fluid outlet 5；The fluid inlet 1 is respectively communicated with the import in external and the nozzle 2, and the outlet of the nozzle 2 connects
Pass through the microlaser cavity 4；It is (i.e. described that the bluff body 3 is located at 4 inside of microlaser cavity position corresponding with the outlet of the nozzle 2
Bluff body 3 is set to the inlet of the microlaser cavity 4), when fluid 7 enters microlaser cavity 4 by nozzle 2 and makees with bluff body 3
Used time bluff body 3 generates flutter；The micro-strip 6 is located in microlaser cavity 4, is located at the direction that bluff body 3 is flowed along fluid 7
Side (i.e. if being direction from front to back with the direction that fluid 7 flows, the micro-strip is located at the rear of the bluff body)
And keep the distance of setting therewith (this is determined apart from size by bluff body size, microlaser cavity size and fluid flow rate)；The stream
Body outlet 5 is connected to the inside and outside of the microlaser cavity 4；The micro-strip 6 is piezoelectricity film material with function.
In specific implementation, it can be set according to actual needs the quantity of microlaser cavity, be provided with three in the present embodiment
Microlaser cavity.Micro-strip and bluff body are set in a manner described in each microlaser cavity, and are connected between each microlaser cavity by nozzle.
Multiple micro-strips can also be set in microlaser cavity, as shown in Figure 2.The collection of energy can be then realized by multiple micro-strips.
Further, the micro-strip 6 is piezoelectricity film material with function, using PZT thin film PZT, aluminium nitride film
AlN, zinc-oxide film ZnO, aluminium nitride scandium film ScxAl1-xN, PVDF thin film, PVDF-TrFE film or PDMS film etc..
Further, the nozzle is sharp mouth nozzle.Pointed nozzle can further enhance the speed of fluid ejection.
As shown in figure 3, a kind of wideband fluid energy collector with above-mentioned micro-strip energy harvester, including force transmission mechanism
8, the fluid inlet of fluid cavity 9, micro-strip energy harvester 101 and fluid line 10, the micro-strip energy harvester 101 passes through stream
Body pipeline 10 is connected to the fluid cavity 9, and the force transmission mechanism 8 is used to apply pressure to the fluid cavity 9.
It further, further include having pedestal 11, the micro-strip energy harvester 101 is set on the pedestal 11.
The working principle of the wideband fluid energy collector is: when vibrational energy acts on fluid by force transmission mechanism
Chamber, it is assumed that suffered fluid cavity is pressure, then the fluid in fluid cavity is pressed into micro-strip energy harvester by pipeline.Into micro-
Fluid with energy harvester flow velocity after nozzle becomes larger, and fluid enters microlaser cavity later.Fluid encounters resistance in microlaser cavity
Fluid generates flutter (generating whirlpool), and deformation occurs for the micro-strip that flutter drives film material with function to form, to generate charge, reaches
To the effect of collection of energy.Micro-strip, which is electrically connected to electrical component, can be realized the utilization of electric energy.
Gentle fluid generates fierce flutter after bluff body, which acts on piezoelectricity film material with function generation,
So that piezoelectricity film material with function generates deformation, there is piezoelectric effect, produce electricl energy.Fig. 4 is that air velocity and piezoelectricity function are thin
The relational graph of membrane material vibration frequency and damped coefficient, when air velocity is more than a certain numerical value (such as A point corresponding speed), fluid
Flutter will force piezoelectricity film material with function to vibrate.
For those skilled in the art, it can be provided various corresponding according to above technical solution and design
Change and modification, and all these change and modification, should be construed as being included within the scope of protection of the claims of the present invention.
Claims (5)
1. a kind of micro-strip energy harvester, which is characterized in that including fluid inlet, nozzle, bluff body, microlaser cavity, micro-strip and stream
Body outlet；The fluid inlet is respectively communicated with the import in external and the nozzle, and the outlet of the nozzle is in described micro-
Type chamber；The bluff body is located at position corresponding with the outlet of the nozzle inside microlaser cavity, when fluid by nozzle into micro-
Type chamber and while having an effect with bluff body generates flutter；The micro-strip is located in microlaser cavity, is located at bluff body along fluid stream
The side in dynamic direction and the distance for keeping setting therewith；The fluid outlet is connected to the inside and outside of the microlaser cavity；
The micro-strip is piezoelectricity film material with function.
2. micro-strip energy harvester according to claim 1, which is characterized in that the micro-strip is piezoelectricity function film material
Material, using PZT thin film PZT, aluminium nitride film AlN, zinc-oxide film ZnO, aluminium nitride scandium film ScxAl1-xN、PVDF
Film, PVDF-TrFE film or PDMS film.
3. micro-strip energy harvester according to claim 1, which is characterized in that the nozzle is sharp mouth nozzle.
4. a kind of wideband fluid energy collector with any micro-strip energy harvester of claim 1-3, feature
It is, including force transmission mechanism, fluid cavity, micro-strip energy harvester and fluid line, the fluid of the micro-strip energy harvester enters
Mouth is connected to the fluid cavity by fluid line, and the force transmission mechanism is used to apply pressure to the fluid cavity.
5. wideband fluid energy collector according to claim 4, which is characterized in that it further include having pedestal, the micro-strip
Energy harvester is set on the pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742796.1A CN109428509A (en) | 2017-08-25 | 2017-08-25 | A kind of micro-strip energy harvester and wideband fluid energy collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742796.1A CN109428509A (en) | 2017-08-25 | 2017-08-25 | A kind of micro-strip energy harvester and wideband fluid energy collector |
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| Publication Number | Publication Date |
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| CN109428509A true CN109428509A (en) | 2019-03-05 |
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| CN201710742796.1A Pending CN109428509A (en) | 2017-08-25 | 2017-08-25 | A kind of micro-strip energy harvester and wideband fluid energy collector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049425A (en) * | 2019-12-31 | 2020-04-21 | 厦门大学 | Novel low-frequency multidirectional vibration energy collecting device with liquid as energy capturing medium |
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| CN102348959A (en) * | 2009-03-12 | 2012-02-08 | 恩德斯+豪斯流量技术股份有限公司 | Vortex flow measuring device for monitoring and/or measuring a distributed particle and/or droplet flow |
| TW201419745A (en) * | 2012-11-09 | 2014-05-16 | David Da-Wei Lin | Piezoelectric micro power generator |
| WO2014204410A1 (en) * | 2013-06-21 | 2014-12-24 | Agency For Science, Technology And Research | Energy harvesting device and method of harvesting energy |
| CN206111499U (en) * | 2016-10-10 | 2017-04-19 | 青岛农业大学 | Infundibulate valveless piezoelectric pump |
| CN106837666A (en) * | 2017-01-12 | 2017-06-13 | 安徽工程大学 | A kind of water flow vibration electricity energy harvester based on Karman vortex street |
-
2017
- 2017-08-25 CN CN201710742796.1A patent/CN109428509A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102348959A (en) * | 2009-03-12 | 2012-02-08 | 恩德斯+豪斯流量技术股份有限公司 | Vortex flow measuring device for monitoring and/or measuring a distributed particle and/or droplet flow |
| TW201419745A (en) * | 2012-11-09 | 2014-05-16 | David Da-Wei Lin | Piezoelectric micro power generator |
| WO2014204410A1 (en) * | 2013-06-21 | 2014-12-24 | Agency For Science, Technology And Research | Energy harvesting device and method of harvesting energy |
| CN206111499U (en) * | 2016-10-10 | 2017-04-19 | 青岛农业大学 | Infundibulate valveless piezoelectric pump |
| CN106837666A (en) * | 2017-01-12 | 2017-06-13 | 安徽工程大学 | A kind of water flow vibration electricity energy harvester based on Karman vortex street |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049425A (en) * | 2019-12-31 | 2020-04-21 | 厦门大学 | Novel low-frequency multidirectional vibration energy collecting device with liquid as energy capturing medium |
| CN111049425B (en) * | 2019-12-31 | 2020-12-11 | 厦门大学 | Low-frequency multidirectional vibration energy collecting device with liquid as energy harvesting medium |
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Application publication date: 20190305 |
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