CN106685263B - The bandwidth dot matrix vibration energy collector of adjustable n × 3 based on modal Separation - Google Patents
The bandwidth dot matrix vibration energy collector of adjustable n × 3 based on modal Separation Download PDFInfo
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- 239000011159 matrix material Substances 0.000 title claims abstract description 18
- 238000000926 separation method Methods 0.000 title claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 20
- 239000003292 glue Substances 0.000 claims description 18
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 239000004332 silver Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 5
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 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 5
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 Methylsiloxane Chemical class 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
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- 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
- H02N2/186—Vibration harvesters
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
The present invention relates to a kind of environmental energy sampler of micro- energy technology field, specifically a kind of bandwidth based on modal Separation the is adjustable dot matrix vibration energy collector of n × 3.A kind of bandwidth based on modal Separation the is adjustable dot matrix vibration energy collector of n × 3, including flexible frame main beam structure, piezoelectric cantilever and mass block；Flexible frame main beam structure is rectangle, is sequentially provided with the identical hollow, rectangular hole of n-1 spacing equal in magnitude along the axis direction above rectangle, forms n row's flexible girder altogether, wherein n >=2；It is pasted on each flexible girder and is fixed with the identical multiple piezoelectric cantilevers of quantity；A mass block is stained in the suspension end of each piezoelectric cantilever.The present invention passes through increase or the number of rows n of reduction piezoelectric cantilever, change simultaneously piezoelectric cantilever and mass size size, can timely adjustment system effective frequency belt width, improve energy collecting device output stability, enhance the adaptive capacity to environment of vibration energy collector.
Description
Technical field
It is specifically a kind of to be based on modal separation the present invention relates to a kind of environmental energy sampler of micro- energy technology field
The bandwidth of technology the is adjustable dot matrix vibration energy collector of n × 3.
Background technique
With wireless mobile sensing technology field environment, monitoring of working condition and it is carry-on in terms of it is extensive
Using with fast development, how for these be applied to special dimension in electronics become be pushed further into its application
Critical issue.Get rid of that chemical cell volume is big, the service life is short, the constraint of the conventional energies supply method such as cable power bridge joint difficulty,
Energy in acquisition sensor perimeter environment is directly the research that system power supply has become wireless mobile sensing technology application field
Hot spot.
Vibrational energy is widely present in communications and transportation (means of transports such as automobile, aircraft and track), mining equipment (big moulded coal
Machine, numerically-controlled machine tool), the application environments such as engineering construction (bridge, building) and organism activity.With the environment such as solar energy, wind energy
Form of energy is compared, and vibrational energy is excellent with significantly powering to the Portable movable wireless sensor in above-mentioned application environment
Gesture.However, conventional vibration energy collecting device frequency band is narrow, energy conversion efficiency is low, output power is small, it is not able to satisfy still at present wireless
The power demands of mobile sensor device.The output power for how improving energy collecting device is widened acquisition frequency band and is allowed to and environment
It is vibrational energy acquisition field critical issue urgently to be resolved that vibration frequency, which matches,.
Notification number is that the Chinese patent of 103346696 A of CN devises the energy of a kind of array piezoelectricity and Electromagnetic heating
Collector widens energy acquisition band width by array architecture, improves energy conversion efficiency, but piezoelectricity and electromagnetic combination
Mode make vibration pick-up structure complicated, be not easy to debug and process.The Chinese patent that notification number is 103023378 A of CN proposes
A kind of multi-direction vibration energy collector of broadband is opened up by 6 T-type structure cantilever beams in the energy acquisition of multiple directions
Broadband, but this device volume is larger, structure is complicated, is not easy to realize.Notification number is the Chinese patent of 102931340 A of CN
A kind of wideband micro piezoelectric vibration energy collector is devised, realizes wider frequency using the different cantilever array of multiple groups
Band output, but its micro fabrication is complicated, and cost of manufacture is higher.Xue et al. proposed multiple bimorph strings in 2008
Connection and energy acquisition structure in parallel, obtain different first order resonance frequencies using the different-thickness of each bimorph,
So that all first order resonance frequencies are very close to come the frequency bandwidth that increases collector.This method has obviously widened work
Frequency band, but its operating frequency range (90-110 Hz) is still higher than the frequency (bridge: 7-10 of vibration source in some environment
Hz, building: 15-20 Hz, rotating machinery: 43-50 Hz, animal activity: 1-45 Hz).Based on this, a kind of low frequency, broadband,
Energy conversion efficiency, high power stablize output, and vibration energy collector design easy to process is particularly important.
Summary of the invention
It is narrow to solve existing energy collecting device working band, the problems such as energy conversion efficiency is low, and output power is small, the present invention
It is proposed a kind of adjustable n × 3 of the bandwidth based on modal Separation dot matrix vibration energy collector vibration pick-up structure, the structure is not only
Be adjustable and widen the frequency range of collector, and designed using dot matrix structure, can effectively improve energy conversion efficiency and
Output power.
The technical scheme adopted by the invention is that: the dot matrix of n × 3 vibration that a kind of bandwidth based on modal Separation is adjustable
Energy collecting device, including flexible frame main beam structure, piezoelectric cantilever and mass block；Flexible frame main beam structure is rectangle, choosing
Determine a center line of rectangle as axis, it is identical along the axis direction to be sequentially provided with n-1 spacing equal in magnitude above rectangle
Hollow, rectangular hole, it is flexible to form n row as flexible girder the entity part of all hollow, rectangular holes two sides in the axial direction altogether
Girder, wherein n >=2；It is pasted on each flexible girder and is fixed with the identical multiple piezoelectric cantilevers of quantity；All piezoelectric cantilevers
Beam towards identical and parallel with axis direction；One end of all piezoelectric cantilevers is pasted and fixed on the upper table of flexible girder
Face, the other end of the piezoelectric cantilever on one most edge flexible girder are suspended in the outside of the most edge flexible girder,
The other end of remaining piezoelectric cantilever is suspended on neighbouring rectangular opening；Multiple piezoelectric cantilevers on the same flexible girder
Beam equidistantly arranges；A mass block is stained in the suspension end of each piezoelectric cantilever.(Fig. 1).
The dot matrix vibration energy collector vibration pick-up structure of the n × 3, including flexible frame main beam structure, piezoelectric cantilever
Beam and mass block.The flexible frame main beam structure uses the high resiliency molecular material of low Young's modulus, and the present invention preferably poly- two
Methylsiloxane (PDMS).The piezoelectric cantilever includes substrate and piezoelectric layer, and wherein piezoelectric layer is piezoceramics film, with
It is bonded between substrate one end by conductive silver glue, mass block is adhered to the suspension end of substrate.Substrate selects elasticity modulus small and strong
Degree is big, can bear the material of larger deformation, the preferred copper sheet substrate of the present invention.Piezoelectric layer selects piezoelectricity strong, and piezoelectric constant is high
Piezoelectric material, the preferred PZT of the present invention.Mass block selects density big, inexpensively, the metal material of easy processing, the preferred iron block of the present invention.
The operation principle of the present invention is that: (both ends in the axial direction are fixed) is fixed at flexible frame main beam structure both ends, when
When the present invention is placed in actual environment vibration system, under extraneous excitation, the fixing end of flexible frame main beam structure is shaken
It moves and entire flexible frame main beam structure is driven to vibrate, to make the piezoelectric cantilever being pasted on flexible frame main beam structure surface
Beam vibrates together, and piezoelectric cantilever converts electric energy for mechanical vibrational energy by the way that deformation occurs in vibration.Flexible Main is arranged by n
The design of beam, adjusts piezoelectric cantilever and mass size on every row's flexible girder to change the effective mass of flexible girder, real
Mode of oscillation separation between existing different flexible girders, and then achieve the effect that widen low-frequency band.All piezoelectric cantilevers use
Cascaded structure realizes connection.
Compared with prior art, the invention has the following advantages:
Using flexible frame structure as girder.The Young's modulus of flexible material is small, structural elasticity is high.Using flexible frame
Structure is easier to experience the vibration of external environment, and vibrational energy is passed to piezoelectric cantilever, to reduce every row's piezoelectric cantilever
Vibration of beam mode can realize that broadband vibration energy acquires in 50 Hz low-frequency range below.
Using the dot matrix Piezoelectric Cantilever Beams of n × 3.By adjusting piezoelectric cantilever and quality on every row's flexible girder
Block size changes the effective mass of different flexible girders, realizes the mode of oscillation separation between different flexible girders, and then reach and open up
The effect of wide low-frequency band.
With the increase of number of rows n in the dot matrix Piezoelectric Cantilever Beams of n × 3, the mode of oscillation of energy collecting device increases, can
The effective band utilized is widened.As number of rows n increases, the quantity of piezoelectric cantilever increases in energy collecting device, output electricity
Pressure increases, while improving the output power of system.
By increasing or reduce the number of rows n of piezoelectric cantilever, piezoelectric cantilever and mass size size are changed simultaneously,
Can timely adjustment system effective frequency belt width, improve energy collecting device output stability, and then enhance vibration
The adaptive capacity to environment of energy collecting device.
Detailed description of the invention
Fig. 1 is overall structure diagram (a- flexible frame main beam structure, b- piezoelectric cantilever, c- mass of the invention
Block).
Fig. 2 is the structural schematic diagram (c- mass block, d- substrate, e- piezoelectric layer) of piezoelectric cantilever.
Fig. 3 by 1 invention of embodiment 2 × 3 dot matrix vibration pick-up structures output frequency resonse characteristic.
Fig. 4 by 2 invention of embodiment 3 × 3 dot matrix vibration pick-up structures output frequency resonse characteristic.
Fig. 5 by 3 invention of embodiment 5 × 3 dot matrix vibration pick-up structures output frequency resonse characteristic.
Specific embodiment
Further clear, complete explanation is made to the present invention below in conjunction with specific embodiment.
Embodiment 1
The present invention includes flexible frame main beam structure a, piezoelectric cantilever b and mass block c, and flexible frame main beam structure a is
Rectangular box-like structure, center are provided with a hollow rectangular opening；One end of piezoelectric cantilever b is pasted and fixed on flexible frame girder
The upper surface of structure a, the other end is hanging, and piezoelectric cantilever b hanging length is less than the width of rectangular opening, and mass block c is adhered to
The suspension end of piezoelectric cantilever b；Six piezoelectric cantilever b(n=2) it is equidistantly arranged in the same direction in rectangular opening two sides respectively.
Flexible frame main beam structure a selects PDMS material, and the lateral surface on the framework both sides parallel with piezoelectric cantilever b is solid
It is fixed.
Piezoelectric cantilever b includes substrate d and piezoelectric layer e, and piezoelectric layer e is pasted onto the rear end table of substrate d using conductive silver glue
Face, mass block c are pasted onto the front end of substrate d with AB glue.Wherein: substrate d uses copper sheet material, and piezoelectric layer e uses PZT-5H material
Material.As shown in figure 3, the width of substrate d and the width of piezoelectric layer e are equal, but the length of substrate d is greater than the length of piezoelectric layer e,
In implementation process, after allowing piezoelectric layer e to be aligned with the one end substrate d, is pasted and fixed with conductive silver glue.Six shown in this embodiment
A piezoelectric cantilever size is identical with mass size, in rectangular opening two sides towards the right side in two rows of distributions, and along hollow, rectangular
Longitudinal direction it is equidistantly arranged in parallel；3 sides substrate d of 1st row and the left alignment of flexible frame main beam structure a are arranged
The right side long side alignment of hollow, rectangular, is then used on column, 3 sides substrate d of the 2nd row and flexible frame main beam structure a
The substrate d of piezoelectric cantilever b is pasted and fixed on the upper surface of flexible frame main beam structure a by AB glue, and the other end is hanging；Six pressures
The connection type of electric cantilever beam b is to be connected in series.
Mass block c uses ferrous material.Mass block c is pasted and fixed on the front end of substrate d with AB glue, with substrate d front end edge
Bound pair is neat, and does not contact with piezoelectric layer e；Mass block c is of same size with piezoelectric cantilever b's.Its frequency response characteristic exported
Curve is as shown in Figure 3.
Embodiment 2
The present invention includes flexible frame main beam structure a, piezoelectric cantilever b and mass block c, and flexible frame main beam structure a is
Rectangular box-like structure, opens that there are two hollow rectangular openings in rectangular configuration；One end of piezoelectric cantilever b is pasted and fixed on flexible box
The upper surface of frame main beam structure a, the other end is hanging, and piezoelectric cantilever b hanging length is less than the width of rectangular opening, mass block c
It is adhered to the suspension end of piezoelectric cantilever b；Nine piezoelectric cantilever b(n=3) respectively two rectangular opening two sides in the same direction
Equidistant arrangement.
Flexible frame main beam structure a selects PDMS material, and the lateral surface on the framework both sides parallel with piezoelectric cantilever b is solid
It is fixed.
Piezoelectric cantilever b includes substrate d and piezoelectric layer e, and piezoelectric layer e is pasted onto the rear end table of substrate d using conductive silver glue
Face, mass block c are pasted onto the front-end surface of substrate d with AB glue.Wherein: substrate d uses copper sheet material, and piezoelectric layer e uses PZT-
5H material.The width of substrate d and equal with the width of piezoelectric layer e that it is pasted, but the length of substrate d is greater than the length of piezoelectric layer e
Degree after allowing piezoelectric layer e to be aligned with the one end substrate d, is pasted with conductive silver glue and is fixed in implementation process.In this embodiment
Nine piezoelectric cantilever sizes and the not exactly the same (size and quality of the 1st row and the 3rd row's piezoelectric cantilever b of mass size
Block size is identical, different from the size of the 2nd row), it is in respectively three rows in two hollow, rectangular holes same direction of two lateral edges
Distribution, and it is equidistantly arranged in parallel along the longitudinal direction of hollow, rectangular；3 sides substrate d of 1st row and flexible frame girder knot
The left alignment of structure a arranges, the side of 3 substrate d of 3 substrate d and the 3rd row of the 2nd row respectively with flexible frame girder knot
The substrate d of piezoelectric cantilever b, is then pasted and fixed on AB glue by the right side long side alignment of upper two hollow, rectangulars of structure a
The upper surface of flexible frame main beam structure a, the other end are hanging；The connection type of nine piezoelectric cantilever b is to be connected in series.
Mass block c uses ferrous material.Mass block c is pasted and fixed on the front end of substrate d with AB glue, with substrate d front end edge
Bound pair is neat, and does not contact with piezoelectric layer e；The width of mass block c and of same size with its piezoelectric cantilever b pasted.Its is defeated
Frequency response characteristic out is as shown in Figure 4.
Embodiment 3
The present invention includes flexible frame main beam structure a, piezoelectric cantilever b and mass block c, and flexible frame main beam structure a is
Rectangular box-like structure, opens that there are four hollow rectangular openings in rectangular configuration；One end of piezoelectric cantilever b is pasted and fixed on flexible box
The upper surface of frame main beam structure a, the other end is hanging, and piezoelectric cantilever b hanging length is less than the width of rectangular opening, mass block c
It is adhered to the suspension end of piezoelectric cantilever b；15 piezoelectric cantilever b(n=5) respectively in four same sides of two lateral edge of rectangular opening
To equidistant arrangement.
Flexible frame main beam structure a selects PDMS material, and the lateral surface on the framework both sides parallel with piezoelectric cantilever b is solid
It is fixed.
Piezoelectric cantilever b includes substrate d and piezoelectric layer e, and piezoelectric layer e is pasted onto the rear end table of substrate d using conductive silver glue
Face, mass block c are pasted onto the front-end surface of substrate d with AB glue.Wherein: substrate d uses copper sheet material, and piezoelectric layer e uses PZT-
5H material.The width of substrate d and equal with the width of piezoelectric layer e that it is pasted, but the length of substrate d is greater than the length of piezoelectric layer e
Degree after allowing piezoelectric layer e to be aligned with the one end substrate d, is pasted with conductive silver glue and is fixed in implementation process.In this embodiment
15 piezoelectric cantilever sizes and not exactly the same (the wherein size and mass block of different row's piezoelectric cantilevers of mass size
Size is not exactly the same, and the size of 3 piezoelectric cantilevers of each row is identical with mass size), respectively in four
Empty rectangular opening two sides are distributed towards the right side in five rows, and equidistantly arranged in parallel along the longitudinal direction of hollow, rectangular；3 bases of 1st row
The left alignment of the side plate d and flexible frame main beam structure a arrange, 3 sides substrate d of remaining every row (row of the 2nd, 3,4 and 5)
Respectively with the right side long side alignment of upper four hollow, rectangulars of flexible frame main beam structure a, then with AB glue by piezoelectric cantilever
The substrate d of beam b is pasted and fixed on the upper surface of flexible frame main beam structure a, and the other end is hanging；15 piezoelectric cantilever b's
Connection type is to be connected in series.
Mass block c uses ferrous material.Mass block c is pasted and fixed on the front end of substrate d with AB glue, with substrate d front end edge
Bound pair is neat, and does not contact with piezoelectric layer e；The width of mass block c and of same size with its piezoelectric cantilever b pasted.Its is defeated
Frequency response characteristic out is as shown in Figure 5.
Claims (4)
1. a kind of bandwidth based on modal Separation the is adjustable dot matrix vibration energy collector of n × 3, which is characterized in that including
Flexible frame main beam structure, piezoelectric cantilever and mass block；Flexible frame main beam structure is rectangle, selectes a center of rectangle
Line is sequentially provided with the identical hollow, rectangular hole of n-1 spacing equal in magnitude along the axis direction above rectangle, owns as axis
The entity part of hollow, rectangular hole two sides in the axial direction forms n row's flexible girder, wherein n >=2 as flexible girder altogether；Often
It is pasted on a flexible girder and is fixed with the identical multiple piezoelectric cantilevers of quantity；All piezoelectric cantilevers towards identical and equal
It is parallel with axis direction；One end of all piezoelectric cantilevers is pasted and fixed on the upper surface of flexible girder, is located at a most edge
The other end of piezoelectric cantilever on flexible girder is suspended in the outside of the most edge flexible girder, remaining piezoelectric cantilever it is another
One end is suspended on neighbouring rectangular opening；Multiple piezoelectric cantilevers on the same flexible girder equidistantly arrange；Every
The suspension end of a piezoelectric cantilever is stained with a mass block；By adjusting piezoelectric cantilever and matter on every row's flexible girder
Gauge block size changes the effective mass of different flexible girders, realizes the mode of oscillation separation between different flexible girders, and then reach
Widen the effect of low-frequency band；All piezoelectric cantilevers realize connection using cascaded structure.
2. the bandwidth dot matrix vibration energy collector of adjustable n × 3 as described in claim 1 based on modal Separation,
It is characterized in that, the axis is the long center line of flexible frame main beam structure；The short side of rectangular opening is parallel with axis；Each flexibility
Fixed piezoelectric cantilever is three on girder.
3. the bandwidth dot matrix vibration energy collector of adjustable n × 3 as claimed in claim 1 or 2 based on modal Separation,
It is characterized in that, piezoelectric cantilever includes substrate and piezoelectric layer, piezoelectric layer is pasted onto the rear end surface of substrate using conductive silver glue,
Mass block is pasted onto the front-end surface of substrate with AB glue.
4. the bandwidth dot matrix vibration energy collector of adjustable n × 3 as claimed in claim 3 based on modal Separation,
It is characterized in that, substrate uses copper sheet material, and piezoelectric layer uses PZT-5H material；The width of substrate and the piezoelectric layer pasted with it
Width is equal, and the length of substrate is greater than the length of piezoelectric layer；Flexible frame main beam structure uses PDMS material.
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| CN107894610A (en) * | 2017-12-13 | 2018-04-10 | 中国地质大学（武汉） | A kind of both arms piezoelectric seismometer |
| CN107884818A (en) * | 2017-12-13 | 2018-04-06 | 中国地质大学（武汉） | A kind of piezoelectric seismometer |
| CN110403288B (en) * | 2019-07-10 | 2022-09-23 | 林爱迪 | Safety airbag helmet and special helmet accelerometer thereof |
| CN112865600B (en) * | 2020-12-31 | 2023-01-17 | 山西财经大学 | Broadband three-dimensional piezoelectric vibration energy collecting array structure |
| CN112865599B (en) * | 2020-12-31 | 2023-01-24 | 山西财经大学 | Three-dimensional broadband vibration energy acquisition structure based on long thin sheet and rod-shaped combination |
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| CN203278696U (en) * | 2012-10-26 | 2013-11-06 | 北京理工大学 | Multiple cantilever wideband MEMS piezoelectric energy harvester |
| CN103633879B (en) * | 2013-12-13 | 2016-03-02 | 太原理工大学 | Based on the vibration energy collector vibration pick-up structure of flexible girder |
| US20160141980A1 (en) * | 2014-11-14 | 2016-05-19 | Microgen Systems, Inc. | Piezoelectric energy harvesting and signal processing system, and method of use |
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