CN204361937U - Novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device - Google Patents
Novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device Download PDFInfo
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- CN204361937U CN204361937U CN201420850415.3U CN201420850415U CN204361937U CN 204361937 U CN204361937 U CN 204361937U CN 201420850415 U CN201420850415 U CN 201420850415U CN 204361937 U CN204361937 U CN 204361937U
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Abstract
One is novel turns round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device, comprises pedestal and turns round the multi-modal piezoelectric vibrator of longitudinal vibration.Turn round the multi-modal piezoelectric vibrator of longitudinal vibration and comprise some branches, the end copper sheet connecting branch and mass.Each branch is made up of the basic unit of brass material, upper bimorph piezo electric layer, lower bimorph piezo electric layer, upper copper electrodes, lower copper electrodes.The branch on middle branch head both sides is short, and the length of both sides branch is not identical yet.The basic unit of all branches is separately fixed on perpendicular end copper sheet.Upper bimorph piezo electric layer, lower bimorph piezo electric layer use epoxy bond respectively on the basic unit of branch, below on, be stained with copper electrodes and lower copper electrodes respectively in the lower floor of the upper strata of upper bimorph piezo electric layer and lower bimorph piezo electric layer.Mass be fixed on connect all basic units end copper sheet on.One end of the longest medial fascicle is connected and fixed on pedestal by key, and other parts are unsettled.The vibrational energy of different modalities in environment can be collected, widen the frequency range collecting vibrational energy, improve energy conversion efficiency.
Description
Technical field
The utility model relates to a kind of energy collecting device of MEMS energy technologies field, especially relates to a kind of novelly turning round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device.
Background technology
In recent years, along with the innovation of the technology such as microelectronics, microsensor, radio communication, what integrate the wireless sensor network of the functions such as wireless telecommunications, information gathering and distributed information processing obtains good development.Wireless sensor network is the network formed by Ad hoc mode by the sensor node of a large amount of low cost integrated microsensor, data processor and wireless transport module.By the transducer be built in node, perception in real time, collection and monitoring are carried out to residing surrounding signals, the mankind and natural interactive mode will be changed, realization is implemented comprehensively to control and monitoring to the physical world residing for us, the logical message world and the objective physical world are merged mutually, and it shows application prospect widely at numerous areas such as environmental monitoring, remote measurement and control, urban traffic control, warehousing management, medical monitoring, military surveillance, space explorations.
Along with the development in epoch, the continuous progress of MEMS (micro electro mechanical system) (MEMS) technology and integrated circuit technique, the MEMS energy collecting device based on vibration continues long and environmentally friendly advantage seems particularly important due to it.Energy harvester is extensive use, comprises various civil and military.In such applications, the most outstanding is for wireless sensor node is powered.The Main Bottleneck of the application of multi-hop sensor network is the powerup issue of each node.Due to wiring or replacing battery high cost, the dense node in network is powered and is become key issue.Concerning implanted or portable node transducer and electronic equipment, common Power supply equipment is battery.But the energy density of battery and restricted lifetime, lithium battery energy density is generally at 0.8kWh/cm under normal circumstances
3left and right.Thus the battery in electronic equipment is constantly changed, but in a lot of occasion, replacing battery is very inconvenient even can cause hardly imaginable consequence.For solving powered battery problem, can from environment harvest energy, for battery charging or be directly electronics.The energy-autarchic that energy in recent years in collection environment realizes low energy-consumption electronic device receives extensive concern.The energy of Collection utilization solar energy, heat energy, mechanical vibrational energy etc. can be had in environment.Mechanical vibrational energy is one of energy widely in environment, naturally life is almost ubiquitous with the vibration in operational environment, and be subject to natural conditions restriction unlike solar energy, heat energy etc., from environment, directly collect vibrational energy is that the energy supply of low power dissipation electron device has broad application prospects.
Although piezoelectric vibration energy collection structure is studied relatively many at present, there is many defects in it.As single cantilever beam single mass piezoelectric vibration energy collection structure, its frequency bandwidth is 2 ξ ω
n(ξ is structural damping ratio; ω
nfor structural natural frequencies), when working in its low-frequency vibration environment at tens hertz, when damping ratio is 0.02, its bandwidth is less than 1 hertz.And generally there is certain fluctuation in the vibration frequency of actual environment, just cannot practical requirement if the bandwidth of piezoelectric energy collection structure is narrow.
Summary of the invention
In order to overcome the problems such as existing energy collecting device bandwidth is narrower, the utility model provides a kind of novel longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device of turning round, can broaden application frequency range, with practical requirement.
The utility model solves to achieve these goals, adopts following technical scheme:
Comprise pedestal and turn round the multi-modal piezoelectric vibrator of longitudinal vibration.Turning round the multi-modal piezoelectric vibrator of longitudinal vibration is cantilever piezoelectric oscillator, comprises some branches, the end copper sheet connecting branch and mass.Each branch is made up of the basic unit of brass material, upper bimorph piezo electric layer, lower bimorph piezo electric layer, upper copper electrodes, lower copper electrodes.The branch on middle branch head both sides is short, and the length of both sides branch is not identical yet.The basic unit of all branches is separately fixed on perpendicular end copper sheet.Upper bimorph piezo electric layer, lower bimorph piezo electric layer use epoxy bond respectively on the basic unit of branch, below on, be stained with copper electrodes and lower copper electrodes respectively in the lower floor of the upper strata of upper bimorph piezo electric layer and lower bimorph piezo electric layer.Mass be fixed on connect all basic units end copper sheet on.One end of the longest medial fascicle is connected and fixed on pedestal by key, and other parts are unsettled.
By such scheme, described branch is provided with the first branch, the second branch, the 3rd branch, and the first branch, the 3rd branch on the second branch head both sides are short, and the length of the first branch, the 3rd branch is not identical yet.Three branches are separately fixed on perpendicular end copper sheet.It is three right that upper bimorph piezo electric layer, lower bimorph piezo electric layer have, three use epoxy bond respectively on the first basic unit of branch, the second basic unit of branch, the 3rd basic unit of branch to upper bimorph piezo electric layer, lower bimorph piezo electric layer, below on, become three piezoelectric cantilevers.
By such scheme, described branch is provided with the first branch, the second branch, the 3rd branch, the 4th branch, quintafurcation, first branch on the second middle branch head both sides, the 3rd branch, the 4th branch, quintafurcation are short, the length of both sides branch is not identical yet, and the 4th branch, quintafurcation are shorter than the first branch, the 3rd branch.Five branches are separately fixed on perpendicular end copper sheet.It is five right that upper bimorph piezo electric layer, lower bimorph piezo electric layer have, five use epoxy bond respectively on the basic unit of five branches to upper bimorph piezo electric layer, lower bimorph piezo electric layer, below on, become five piezoelectric cantilevers.
By such scheme, described upper bimorph piezo electric layer, lower bimorph piezo electric layer are PZT-5H material.
By such scheme, described mass is tungsten alloy material.
The beneficial effects of the utility model are: utilize direct piezoelectric effect, by the piezoelectric vibrator branch that different length is differently strained, can collect the vibrational energy of different modalities in environment, widen the frequency range collecting vibrational energy, improve energy conversion efficiency.
Accompanying drawing explanation
Fig. 1 is structural upright schematic diagram of the present utility model.
Fig. 2 is structure schematic top plan view of the present utility model.
Fig. 3 is the structural representation of branch of the present utility model.
Fig. 4 is the structural representation of basic unit of the present utility model.
Fig. 5 is the structural upright schematic diagram of the utility model expansion branch.
In figure: 1. pedestal, 2. the first branch, 3. the second branch, 4. the 3rd branch, 5. mass, 6. goes up copper electrodes, 7. go up bimorph piezo electric layer, 8. basic unit, 9. descend bimorph piezo electric layer, 10. descend copper electrodes, 11. the 3rd basic units of branch, 12. second basic units of branch, 13. first basic units of branch, 14. end copper sheets, 15. the 4th branches, 16. quintafurcations.
Embodiment
The utility model is further illustrated below in conjunction with drawings and Examples.
Embodiment one
As shown in Fig. 1, Fig. 2 and Fig. 3, comprise pedestal 1 and turn round the multi-modal piezoelectric vibrator of longitudinal vibration.Turning round the multi-modal piezoelectric vibrator of longitudinal vibration is cantilever piezoelectric oscillator, comprises the first branch 3 of branch 2, second, the 3rd branch 4, connects the end copper sheet 14 of three branches and the mass 5 of tungsten alloy material.The basic unit 8 of the brass material be made up of the first basic unit of branch 12 of basic unit of branch 13, second, the 3rd basic unit of branch 11 forms mountain font with the end copper sheet 14 being connected three basic units of branch.The upper bimorph piezo electric layer 7 of three pairs of PZT-5H materials, lower bimorph piezo electric layer 9 use epoxy bond respectively in first basic unit of branch 12 of basic unit of branch 13, second, the 3rd basic unit of branch 11 of basic unit 8, are stained with copper electrodes 6 and lower copper electrodes 10 respectively in the lower floor of the upper strata of upper bimorph piezo electric layer 7 and lower bimorph piezo electric layer 9.
Be positioned at the second middle branch 3 long, the 3rd branch 4 on both sides and the first branch 2 short, the 3rd branch 4 and the first branch length are not identical yet.
Mass be fixed on connect all basic units 8 end copper sheet 14 on, one end of the second the longest branch 3 is connected and fixed on pedestal 1 by key, and other parts are unsettled.
Embodiment two
As shown in Figure 5, the frequency range of energy collecting device better can be widened by expanding more branch.On the basis of embodiment one, increase by the 4th branch 15 and quintafurcation 16, the length of the 4th branch 15 and quintafurcation 16 is all less than other three branches, and the 4th branch 15 and quintafurcation 16 form by the basic unit 8 of brass material, the upper bimorph piezo electric layer 7 of PZT-5H material, lower bimorph piezo electric layer 9, upper copper electrodes 6, lower copper electrodes 10.By expansion branch, thus add different resonant frequency points, reach the object widening frequency range.
Based on above-described embodiment, by increasing more branch, the effect of better broadened bandwidth can also be reached.
Under nature, bimorph piezo electric oscillator transfixion.When there is vibrational energy in environment, piezoelectric vibrator vibrates thereupon, upper bimorph piezo electric layer 7 in basic unit 8 and lower bimorph piezo electric layer 9 are due to direct piezoelectric effect generation electric energy, when the vibration frequency in environment is close with this structural natural frequencies, mesomerism, now the output voltage of this structure will reach maximum.Due to this energy collecting device, to turn round longitudinal vibration multi-modal, the length of its branch is different, the longest branch is only had to fix in all branches, and there is resonance frequencys different separately in each branch, this device not only has moderate finite deformation in vertical state, also has larger moment of torsion, makes resonance frequency continuous by adjust structure parameter, thus at certain frequency range interior resonance or close to resonance, thus efficient harvest energy in wider frequency range can be realized.
Claims (5)
1. novelly turn round a longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device, it is characterized in that: comprise pedestal (1) and turn round the multi-modal piezoelectric vibrator of longitudinal vibration; Turning round the multi-modal piezoelectric vibrator of longitudinal vibration is cantilever piezoelectric oscillator, comprises some branches, the end copper sheet (14) connecting branch and mass (5); Each branch is made up of the basic unit (8) of brass material, upper bimorph piezo electric layer (7), lower bimorph piezo electric layer (9), upper copper electrodes (6), lower copper electrodes (10); The branch on middle branch head both sides is short, and the length of both sides branch is not identical yet; The basic unit of all branches is separately fixed on perpendicular end copper sheet (14); Upper bimorph piezo electric layer (7), lower bimorph piezo electric layer (9) use epoxy bond respectively on the basic unit (8) of branch, below on, be stained with upper copper electrodes (6) and lower copper electrodes (10) respectively on the upper strata of upper bimorph piezo electric layer (7) and the lower floor of lower bimorph piezo electric layer (9); Mass (5) is fixed on the end copper sheet (14) of all basic units of connection (8); One end of the longest medial fascicle is connected and fixed on pedestal (1) by key, and other parts are unsettled.
2. according to claim 1ly novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device, it is characterized in that: described upper bimorph piezo electric layer (7), lower bimorph piezo electric layer (7) are PZT-5H material.
3. according to claim 1 and 2ly novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device, it is characterized in that: described mass (5) is tungsten alloy material.
4. according to claim 3ly novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device, it is characterized in that: described branch is provided with the first branch (2), the second branch (3), the 3rd branch (4), first branch (2), the 3rd branch (4) on the second branch (3) long both sides are short, and the length of the first branch (2), the 3rd branch (4) is not identical yet; Three branches are separately fixed on perpendicular end copper sheet (14); It is three right that upper bimorph piezo electric layer (7), lower bimorph piezo electric layer (9) have, the three pairs of upper bimorph piezo electric layers (7), lower bimorph piezo electric layer (9) use epoxy bond respectively on the first basic unit of branch (13), the second basic unit of branch (12), the 3rd basic unit of branch (11), below on, become three piezoelectric cantilevers.
5. according to claim 3ly novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device, it is characterized in that: described branch is provided with the first branch (2), second branch (3), 3rd branch (4), 4th branch (15), quintafurcation (16), first branch (2) on middle the second branch (3) long both sides, 3rd branch (4), 4th branch (15), quintafurcation (16) is short, the length of both sides branch is not identical yet, 4th branch (15), quintafurcation (16) is shorter than the first branch (2), 3rd branch (4), five branches are separately fixed on perpendicular end copper sheet (14), it is five right that upper bimorph piezo electric layer (7), lower bimorph piezo electric layer (9) have, the five pairs of upper bimorph piezo electric layers (7), lower bimorph piezo electric layer (9) use epoxy bond respectively on the basic unit (8) of five branches, below on, become five piezoelectric cantilevers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850415.3U CN204361937U (en) | 2014-12-29 | 2014-12-29 | Novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850415.3U CN204361937U (en) | 2014-12-29 | 2014-12-29 | Novelly turn round longitudinal vibration multi-modality broad-frequency bimorph piezo electric energy collecting device |
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| CN204361937U true CN204361937U (en) | 2015-05-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515442A (en) * | 2015-12-04 | 2016-04-20 | 国网江西省电力科学研究院 | Socket-type piezoelectric energy harvester |
| CN107733282A (en) * | 2017-10-24 | 2018-02-23 | 安徽理工大学 | One kind has adaptive cantilever piezoelectric energy recycle device |
| CN108957031A (en) * | 2018-08-07 | 2018-12-07 | 东南大学 | Wide range high sensitivity vibration of optical sensor based on vibration coupling |
| CN109428516A (en) * | 2017-08-29 | 2019-03-05 | 三角力量管理株式会社 | Generating element |
-
2014
- 2014-12-29 CN CN201420850415.3U patent/CN204361937U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515442A (en) * | 2015-12-04 | 2016-04-20 | 国网江西省电力科学研究院 | Socket-type piezoelectric energy harvester |
| CN105515442B (en) * | 2015-12-04 | 2017-12-12 | 国网江西省电力科学研究院 | A kind of mortar type piezoelectric harvester |
| CN109428516A (en) * | 2017-08-29 | 2019-03-05 | 三角力量管理株式会社 | Generating element |
| CN109428516B (en) * | 2017-08-29 | 2020-01-07 | 三角力量管理株式会社 | Power generating element |
| US11329576B2 (en) | 2017-08-29 | 2022-05-10 | Tri-Force Management Corporation | Power generating element |
| CN107733282A (en) * | 2017-10-24 | 2018-02-23 | 安徽理工大学 | One kind has adaptive cantilever piezoelectric energy recycle device |
| CN108957031A (en) * | 2018-08-07 | 2018-12-07 | 东南大学 | Wide range high sensitivity vibration of optical sensor based on vibration coupling |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20161229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |