CN207304406U - Equal strength beam type piezoelectric vibration energy collector - Google Patents
Equal strength beam type piezoelectric vibration energy collector Download PDFInfo
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- CN207304406U CN207304406U CN201720961787.7U CN201720961787U CN207304406U CN 207304406 U CN207304406 U CN 207304406U CN 201720961787 U CN201720961787 U CN 201720961787U CN 207304406 U CN207304406 U CN 207304406U
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- equal strength
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Abstract
The utility model provides a kind of equal strength beam type piezoelectric vibration energy collector, is made of pedestal, equal strength piezoelectric laminated beams and mass block.The piezoelectric cantilever of the vibrational energy collector is designed using equal strength piezoelectric laminated beams, and the bending resistant section coefficient of equal strength piezoelectric laminated beams changes with the change of moment of flexure, uses larger cross-section in moment of flexure larger part, small cross sections are used in moment of flexure smaller part；The maximum (normal) stress in each section of equal strength piezoelectric laminated beams is all equal, and is equal to the allowable stress of piezoelectric.The utility model can make full use of piezoelectric, improve the energy density of vibrational energy collector, and simple in structure, make and installation is very convenient.
Description
Technical field
It the utility model is related to energy acquisition field, more particularly to a kind of piezoelectric vibration that vibrational energy is converted to electric energy
Electricity energy harvester.
Background technology
The features such as due to the small of vibrational energy collector, long lifespan, high, pollution-free energy density, with self energizing
The quick hair of the low power dissipation electron equipment such as wireless internet of things technology and MEMS (micro-electro-mechanical system)
Exhibition, vibration energy harvesting have received widespread attention, and vibration energy harvesting technology also develops rapidly.Vibration energy harvesting, not only
It can power to MEMS, the utilization ratio of energy can also be improved in specific occasion, reduces harmful vibration, therefore it is good in structure
Many fields such as health monitoring, aerospace obtain important application.However, the piezoelectric type vibration collection of energy present at present
Device is uniform beam.For cross-section piezoelectric cantilever, the maximum (normal) stress on different cross section is different, is maximum in moment of flexure
On the section of value, maximum deflection direct stress is maximum, and moment of flexure is smaller on remaining each section, the maximum deflection direct stress in section also just compared with
Low, piezoelectric is not made the best use of everything；Moreover, the rigidity of uniform cantilever beam is larger.
Utility model content
To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of collection of equal strength beam type piezoelectric energy
Vibrational energy can be converted to electric energy by device, the energy collecting device, and there is simple in structure, easy for installation, piezoelectric utilization rate to fill
Grade advantage.Describe the structure of the utility model, including part in detail below in conjunction with the accompanying drawings, the connection of each part is closed
System, and the operation principle of the utility model.
(1) overall structure describes：
The equal strength beam type piezoelectric vibration energy collector of the utility model includes pedestal, equal strength piezoelectric laminated beams, matter
Gauge block is formed.
The pedestal is used to install equal strength piezoelectric laminated beams.
The equal strength piezoelectric laminated beams push material layer, variable cross-section metal substrate is formed by upper piezoelectric material layer.
Upper piezoelectric material layer is bonded on variable cross-section metal substrate with pushing material layer by non-conductive adhesive glue, and piezoelectric material layer is
The energy conversion unit of vibrational energy collector.Variable cross-section metal substrate is the rigidity unit of vibrational energy collector, using not
With metal material and different sizes to adjust the rigidity of energy harvester.
Pedestal, other end quality of connection block are fixed in described equal strength piezoelectric laminated beams one end.
The mass block is fixed on equal strength piezoelectric laminated beams, and quality block size is adjustable, by adjusting mass block
Size can adjust the working frequency of energy harvester.
(2) further design feature description：
Above-mentioned variable cross-section metal substrate is steel, copper material or aluminium alloy elastomeric material, its structure is variable cross-section knot
Structure.
Above-mentioned piezoelectric is piezoelectric ceramics or piezoelectric membrane.
The material that above-mentioned mass block is lead, steel isodensity is bigger makes.
(3) operation principle：
In order to make full use of piezoelectric, the energy density of piezoelectric type vibration energy harvester is improved, the utility model is adopted
With equal strength piezoelectric laminated beams designing scheme, the bending resistant section coefficient of equal strength piezoelectric laminated beams is set to become with the change of moment of flexure
Change, use larger cross-section in moment of flexure larger part, small cross sections are used in moment of flexure smaller part；The maximum in each section of non-uniform beam is just
Stress is all equal, and is equal to the allowable stress of piezoelectric.If the moment of flexure on any section of non-uniform beam is M (x), and is cut
The bending resistant section coefficient in face is W (x), then should meet：
In formula (1), σmaxFor section maximum (normal) stress, [σ] is allowable stress, and n is safety coefficient, and x is stress point to fixation
The distance at end.Above formula (1) can be written as：
For the structure shown in attached drawing 1, the equivalent statical model of the utility model is as shown in Figure 3.The width of its fixing end
It is any cross-sectional width to spend for a, effective length l, b (x), and depth of beam is that then its Bending Moment Equations is h：
M (x)=P (l-x) (3)
In formula (3), P is external applied load.
Section maximum stress is：
In formula (4), ymaxFor the distance of maximum stress point to neutral axis.
The moment of inertia of rectangular cross section is：
If the maximum stress on equal strength piezoelectric laminated beams surface is equal everywhere, have：
Formula (3) and formula (5) are substituted into formula (6) the change width rules of equal strength piezoelectric laminated beams can be obtained and be：
The beneficial effects of the utility model are：
In order to make full use of piezoelectric, the energy density of piezoelectric type vibration energy harvester is improved, the utility model is adopted
With equal strength piezoelectric laminated beams designing scheme, i.e. the bending resistant section coefficient of equal strength piezoelectric cantilever becomes with the change of moment of flexure
Change, use larger cross-section in moment of flexure larger part, small cross sections are used in moment of flexure smaller part；The maximum in each section of non-uniform beam is just
Stress is all equal, and is equal to allowable stress.The utility model has the following advantages：
(1) piezoelectric can be made full use of, improves the energy conversion efficiency of vibrational energy collector；
(2) it is simple in structure, make and installation is very convenient.
Brief description of the drawings
Fig. 1 is equal strength beam type piezoelectric vibration energy collector front view；
Fig. 2 is equal strength beam type piezoelectric vibration energy collector top view；
Fig. 3 is the statics equivalent model of equal strength beam type piezoelectric vibration energy collector；
Shown in figure label：1st, pedestal, 2, upper piezoelectric material layer, 3, push material layer, 4, variable cross-section metal substrate, 5,
Mass block.
Embodiment
The specific implementation method of the utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the utility model proposes equal strength beam type piezoelectric vibration energy collector by pedestal (1), etc. it is strong
Spend piezoelectric laminated beams and mass block (5) composition.The equal strength piezoelectric laminated beams are by upper piezoelectric material layer (2), lower piezoelectric material
The bed of material (3), variable cross-section metal substrate (4) are formed；The pedestal (1) is used to install equal strength piezoelectric laminated beams；Variable cross-section gold
The left end for belonging to substrate (4) is fixed on pedestal (1), and right end quality of connection block (5), variable cross-section metal substrate is vibration energy harvesting
The rigidity unit of device, using different metal materials and different sizes adjusting the rigidity of energy harvester；The upper pressure
Material layer (2) is bonded on variable cross-section metal substrate (4) with pushing material layer (3) by nonconducting adhesive glue, piezoelectricity
Material layer is the energy conversion unit of vibrational energy collector；The mass block (5) is fixed on equal strength piezoelectric laminated beams,
Quality block size is adjustable, by adjusting the size of mass block to adjust the working frequency of vibrational energy collector.
Above example is only to illustrate the technological thought of the utility model, it is impossible to the protection model of the utility model is limited with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical solution, each falls within this reality
Within the scope of novel protected.
Claims (8)
1. a kind of equal strength beam type piezoelectric vibration energy collector, it is characterised in that by pedestal, equal strength piezoelectric laminated beams and matter
Gauge block is formed；The bending resistant section coefficient of equal strength piezoelectric laminated beams changes with the change of moment of flexure, is used in moment of flexure larger part
Larger cross-section, small cross sections are used in moment of flexure smaller part；The maximum (normal) stress in each section is all equal, and is equal to piezoelectric
Allowable stress；Equal strength piezoelectric laminated beams push material layer, variable cross-section metal substrate is formed by upper piezoelectric material layer.
2. equal strength beam type piezoelectric vibration energy collector according to claim 1, it is characterised in that the pedestal is used
In installation equal strength piezoelectric laminated beams.
3. equal strength beam type piezoelectric vibration energy collector according to claim 1, it is characterised in that the upper piezoelectricity
Material layer is bonded on variable cross-section metal substrate, piezoelectric material layer is vibration with pushing material layer by non-conductive adhesive glue
The energy conversion unit of energy harvester.
4. equal strength beam type piezoelectric vibration energy collector according to claim 1, it is characterised in that the variable cross-section
Metal substrate is the rigid element of vibrational energy collector, uses different metal materials and different sizes to adjust energy receipts
The rigidity of storage.
5. equal strength beam type piezoelectric vibration energy collector according to claim 1, it is characterised in that the equal strength
Pedestal, other end quality of connection block are fixed in piezoelectric laminated beams, one end.
6. equal strength beam type piezoelectric vibration energy collector according to claim 1, it is characterised in that the quality
Block, is fixed on equal strength piezoelectric laminated beams, and quality block size is adjustable, by adjusting the size of mass block to adjust collection of energy
The working frequency of device.
7. the equal strength beam type piezoelectric vibration energy collector according to claim 1 or 3 or 4, it is characterised in that described
Variable cross-section metal substrate is the elastic metallic material of steel, copper material or aluminium alloy, its structure is variable section structure.
8. the equal strength beam type piezoelectric vibration energy collector according to claim 1 or 3, it is characterised in that the pressure
Electric material is piezoelectric ceramics or piezoelectric membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720961787.7U CN207304406U (en) | 2017-08-03 | 2017-08-03 | Equal strength beam type piezoelectric vibration energy collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720961787.7U CN207304406U (en) | 2017-08-03 | 2017-08-03 | Equal strength beam type piezoelectric vibration energy collector |
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| Publication Number | Publication Date |
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| CN207304406U true CN207304406U (en) | 2018-05-01 |
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| CN201720961787.7U Expired - Fee Related CN207304406U (en) | 2017-08-03 | 2017-08-03 | Equal strength beam type piezoelectric vibration energy collector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294424A (en) * | 2017-08-03 | 2017-10-24 | 安徽理工大学 | Equal strength beam type piezoelectric vibration energy collector |
| CN109149101A (en) * | 2018-08-31 | 2019-01-04 | 迪泰（浙江）通信技术有限公司 | A kind of satellite antenna outer cover |
| CN110391769A (en) * | 2019-08-09 | 2019-10-29 | 安徽理工大学 | One kind being rounded section piezoelectricity low amplitude vibration energy accumulator |
| CN111585021A (en) * | 2020-05-16 | 2020-08-25 | 西安工业大学 | Self-powered antenna system based on graphene composite material and manufacturing method |
-
2017
- 2017-08-03 CN CN201720961787.7U patent/CN207304406U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294424A (en) * | 2017-08-03 | 2017-10-24 | 安徽理工大学 | Equal strength beam type piezoelectric vibration energy collector |
| CN109149101A (en) * | 2018-08-31 | 2019-01-04 | 迪泰（浙江）通信技术有限公司 | A kind of satellite antenna outer cover |
| CN110391769A (en) * | 2019-08-09 | 2019-10-29 | 安徽理工大学 | One kind being rounded section piezoelectricity low amplitude vibration energy accumulator |
| CN111585021A (en) * | 2020-05-16 | 2020-08-25 | 西安工业大学 | Self-powered antenna system based on graphene composite material and manufacturing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20200803 |