CN207603479U - A kind of vibrational energy collector - Google Patents
A kind of vibrational energy collector Download PDFInfo
- Publication number
- CN207603479U CN207603479U CN201721076093.1U CN201721076093U CN207603479U CN 207603479 U CN207603479 U CN 207603479U CN 201721076093 U CN201721076093 U CN 201721076093U CN 207603479 U CN207603479 U CN 207603479U
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- CN
- China
- Prior art keywords
- mass block
- cantilever beam
- stopper
- free end
- vibrational energy
- 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.)
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Abstract
The utility model discloses a kind of vibrational energy collectors, mass block including cantilever beam, set on the free end of the cantilever beam and the piezoelectric layer set on the cantilever beam surface, the top of the free end of the cantilever beam are equipped with stopper corresponding with the mass block position；The distance between the minimum point of the stopper and the equalization point of mass block are less than the amplitude when mass block works normally.The utility model in the top of cantilever beam free end by setting stopper corresponding with the mass block position of cantilever beam, when the vibrational energy of external environment forces mass block up-down vibration, since the distance between stopper and mass block equalization point are d, when the oscillation amplitude of mass block is more than d, mass block will mutually be collided with stopper, so that output amplitude is certain in wider frequency range, the stability of device output is improved.
Description
Technical field
The utility model is related to the technical fields of collection of energy, and in particular to a kind of vibrational energy collector.
Background technology
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 as each colleges and universities, research institution and company research hot spot.Wherein, wireless sensor network（WSN）For 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,
Need energy supply module that is small-sized, persistently energizing.And it is collected based on environmental energy（Energy Harvesting）MEMS
Micro- energy theoretically, can provide inexhaustible energy for wireless sensor node, therefore either academia is still
Industrial quarters 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 of most generally existing in nature, the mode of collection includes piezoelectric type, electromagnetism
Formula is electrostatic etc..Piezoelectric type energy collector generally using cantilever beam structure, compared with the collection mode of other modes, has phase
When simple structure, energy density is high, and micromechanics can be used（MEMS）The advantages that processing technology makes, becomes collection of energy in recent years
The hot spot in device field.
All there is some shortcomings for the current vibrational energy collector for being mostly based on piezoelectric effect:(1) it is existing at present
Output voltage/power of piezoelectric energy collector is too low, it is difficult to meet the requirement of energy stores and the multiple devices of driving;(2) work
Make narrower bandwidth, can only just there is larger output in the range of very little near resonant frequency.Based on this, some patents also proposed one
A little solutions.Such as Chinese patent CN103647475A（Publication date：2014.03.19）Become using tip and Basement collision
Shape, so as to which piezoelectric patches be driven to deform, and then the mode for generating charge carries out collection of energy.The tip of the collector needs and base
Bottom collides, and tip strength is originally smaller, and multiple impacts can cause to damage.Chinese patent CN105262371A（Publication date：
2016-01-20）Frequency range is widened using the collector unit array of different parameters structure.The energy harvester of which
Each collector unit resonant frequency is different, therefore no matter is operated in which frequency, in array other energy collection units due to
The frequency of vibration be not its resonant frequency and in stagnating working condition, so the general work efficiency of the energy harvester compared with
It is low.
Utility model content
In view of the deficiencies of the prior art, the utility model is intended to provide a kind of vibrational energy collector, by setting cantilever
The stopper of beam, when the vibrational energy of external environment forces mass block up-down vibration, if the oscillation amplitude of mass block is more than
With the distance of stopper, mass block will mutually be collided with stopper so that the same voltage of the output phase in wider frequency range
Or power magnitude, improve the stability that device exports.
To achieve these goals, the utility model adopts the following technical solution:
A kind of vibrational energy collector, including cantilever beam, set on the free end of the cantilever beam mass block and be set on
The piezoelectric layer on the cantilever beam surface, the top of the free end of the cantilever beam are equipped with blocking corresponding with the mass block position
Block；The distance between the minimum point of the stopper and the equalization point of mass block are less than the shaking when mass block works normally
Width.
Further, the vibrational energy collector has further included package casing；The package casing includes upper cover under
Lid has vacuum lumen between the upper cover and lower cover, the free end of the cantilever beam is located in the vacuum lumen, and have
There is oscillation space；Upper cover position corresponding with the mass block position is as stopper.
The beneficial effects of the utility model are：
1st, by setting stopper corresponding with the mass block position of cantilever beam in the top of cantilever beam free end, work as the external world
When the vibrational energy of environment forces mass block up-down vibration, since the distance between stopper and mass block equalization point are d, work as matter
When the oscillation amplitude of gauge block is more than d, mass block will mutually be collided with stopper so that the output amplitude in wider frequency range
Centainly, the stability of device output is improved.
2nd, further, by using the internal encapsulating structure with vacuum lumen, it is possible to reduce mass block was being swung
Damping in journey improves the collection efficiency of energy harvester.
And so that the free end of the cantilever beam is located in the vacuum lumen and with oscillation space, then in Vacuum Package
The spacing of vacuum chamber is controlled in the process, is collided with cavity wall when mass block motion amplitude is larger, can also be played setting and be hindered
The effect of block so that output amplitude is certain in wider frequency range, improves the stability of device output.
Description of the drawings
Fig. 1 is the simplification structure diagram of the utility model embodiment 1；
Fig. 2 is the structure diagram of the utility model embodiment 2.
Specific embodiment
Below with reference to attached drawing, the utility model will be further described, it should be noted that the present embodiment is with this skill
Premised on art scheme, detailed embodiment and specific operating process are given, but the scope of the present invention is not limited to this reality
Apply example.
Embodiment 1
As shown in Figure 1, a kind of vibrational energy collector, including AlN/Si（Or other piezoelectric materials and structural material
Combination）Cantilever beam 1, the mass block 2 set on the free end of the cantilever beam 1 and the piezoelectric layer set on 1 surface of cantilever beam；
The top of the free end of the cantilever beam 1 is equipped with stopper 3 corresponding with 2 position of mass block；The stopper 3 it is minimum
The distance between point and the equalization point of mass block 2 are less than the amplitude during mass block 2 normal work.Wherein dotted portion represents
Mass block is vibrated to position signal when being collided with stopper.
When the vibrational energy of external environment forces mass block up-down vibration, amplitude when being worked normally due to mass block must
Distance d must be more than（D sizes are determined jointly by vibration frequency, vibration acceleration and the required bandwidth under mass block specific works environment
It is fixed, and pass through numerical simulation and obtain concrete numerical value）.When the oscillation amplitude of mass block is more than d, mass block will be with stopper phase
Mutually collision so that output amplitude is certain in wider frequency range, improves the stability of device output.
Embodiment 2
As shown in Fig. 2, the mass block 2 in addition to cantilever beam 1 and set on the free end of the cantilever beam 1, vibration energy harvesting
Device has further included package casing；The package casing includes upper cover 4 and lower cover 5, has vacuum between the upper cover 4 and lower cover 5
Inner cavity 6, the free end of the cantilever beam 1 are located in the vacuum lumen 6, and with oscillation space（I.e. with upper cover and lower cover
There is a certain distance）, the upper cover 4 position corresponding with 2 position of mass block is equivalent to stopper, the position of upper cover 4
Amplitude when being necessarily less than mass block normal work of the distance d of equalization point of bottom surface and mass block 2.In the present embodiment, institute
It states upper cover 4 and serves as the stopper, collided with the bottom surface of upper cover corresponding position when mass block motion amplitude is larger, can risen
To the effect of setting stopper so that output amplitude is certain in wider frequency range, improves the stability of device output.Piezoelectricity
Layer includes electrode 7 and piezoelectric layer 8 as shown in Figure 2.
For those skilled in the art, it can be provided various corresponding according to above technical solution and design
Change and deformation, and all these change and deformation, should be construed as being included in the utility model claims protection domain it
It is interior.
Claims (2)
1. a kind of vibrational energy collector, including cantilever beam, set on the mass block of the free end of the cantilever beam and set on institute
State the piezoelectric layer on cantilever beam surface, which is characterized in that the top of the free end of the cantilever beam is equipped with and the mass block position
Corresponding stopper；The distance between the minimum point of the stopper and the equalization point of mass block are less than the normal work of the mass block
Amplitude when making.
2. vibrational energy collector according to claim 1, which is characterized in that further included package casing；The encapsulation
Shell includes upper cover and lower cover, has vacuum lumen between the upper cover and lower cover, the free end of the cantilever beam is positioned at described
In vacuum lumen, and with oscillation space；Upper cover position corresponding with the mass block position is as stopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721076093.1U CN207603479U (en) | 2017-08-25 | 2017-08-25 | A kind of vibrational energy collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721076093.1U CN207603479U (en) | 2017-08-25 | 2017-08-25 | A kind of vibrational energy collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207603479U true CN207603479U (en) | 2018-07-10 |
Family
ID=62753352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721076093.1U Expired - Fee Related CN207603479U (en) | 2017-08-25 | 2017-08-25 | A kind of vibrational energy collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207603479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428514A (en) * | 2017-08-25 | 2019-03-05 | 青岛因菲尼思微电子科技有限公司 | A kind of vibrational energy collector |
-
2017
- 2017-08-25 CN CN201721076093.1U patent/CN207603479U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428514A (en) * | 2017-08-25 | 2019-03-05 | 青岛因菲尼思微电子科技有限公司 | A kind of vibrational energy collector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180710 Termination date: 20210825 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |