CN109728746A - A kind of bistable state nonlinear energy collection device using lever - Google Patents
A kind of bistable state nonlinear energy collection device using lever Download PDFInfo
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- CN109728746A CN109728746A CN201910133834.2A CN201910133834A CN109728746A CN 109728746 A CN109728746 A CN 109728746A CN 201910133834 A CN201910133834 A CN 201910133834A CN 109728746 A CN109728746 A CN 109728746A
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- lever
- bistable state
- energy collection
- fixing piece
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Abstract
The invention discloses a kind of bistable state nonlinear energy collection devices using lever, including energy gathering devices and lever construction；The energy gathering devices use bistable state nonlinear organization, convert electric energy for mechanical energy using vibration；The lever construction is combined with bistable state nonlinear organization, for amplifying the effect of excitation to improve efficiency of energy collection.A kind of bistable state nonlinear energy collection device using lever provided by the invention can greatly enlarged excitation effect, have good across trap dynamic response, efficiency of energy collection can be significantly improved.
Description
Technical field
The invention belongs to micro-electronic mechanical skill fields, and in particular to a kind of bistable state nonlinear energy receipts using lever
Acquisition means.
Background technique
People are intended to find a kind of energy collecting device for utilizing vibration for meeting miniaturized electronics all the time
And the energy requirement of sensor, the energy sustainability of microelectron-mechanical (MEMS) can be preferably realized in this way.Existing energy
Collection device usually using vibration, converts electric energy for mechanical energy.In order to improve energy conversion efficiency, it is necessary to assure excitation can be with
Cause vibration as big as possible, however, but can only operate in currently based on the energy collecting device that linear structure designs has very much
Bandwidth near the resonant frequency of limit.In order to expand effective collection bandwidth, nonlinear organization is introduced in energy collecting device
Design in.
In existing research, bistable state energy collecting device is widely used due to its excellent performance.Due to double
Steady state energy collection device tool may be shown violent " across trap between the two settling positions there are two settling position
Oscillation ", as long as this phenomenon can occur in wider frequency band after that is, excitation reaches some critical values.
In the prior art, if not considering various bistable implementations, bistable state energy collecting device can be approximatively
It is described as the Duffing oscillator structure of the single degree of freedom, which is made of linear damping and non-linear rigidity.To improve bistable
The performance of state energy collecting device, existing some technical solutions include introducing new Dynamic Coupling, such as add the line of auxiliary
Property structure etc., can effectively increase excitation, to improve across trap dynamic response, be improved its performance；On the other hand, also
There are some technical solutions by the interaction of multiple magnet, increases the potential energy well quantity of system, keep potential energy well depth obvious
Lower than conventional bistable state energy collecting device, across the trap dynamic response under small excitation can be promoted in this way.Nevertheless, these
Scheme implements more complicated and difficult.
Summary of the invention
For the above-mentioned problems in the prior art and disadvantage, it is non-using the bistable state of lever that the present invention provides a kind of
Linear energy collection device, can greatly enlarged excitation effect, have good across trap dynamic response, energy can be significantly improved
Measure collection efficiency.
For this purpose, the invention adopts the following technical scheme:
A kind of bistable state nonlinear energy collection device using lever, including energy gathering devices and lever construction；Institute
Energy gathering devices are stated using bistable state nonlinear organization, convert electric energy for mechanical energy using vibration；The lever construction with
Bistable state nonlinear organization combines, for amplifying the effect of excitation to improve efficiency of energy collection.
Preferably, which includes piezoelectric sheet beam, connector, lever mass block, lever, boundary fixing piece, lever company
Fitting hinge, lever rotation axis, compressing member and pedestal；The boundary fixing piece is equipped with two pieces, is placed in the two sides of pedestal；The pressure
Tight part also there are two, it is hinged with corresponding boundary fixing piece respectively, rotate compressing member；The piezoelectric sheet beam is located at two
Between a compressing member, both ends are compacted part respectively and clamp and fix；The lever rotation axis block boundary that is placed in one is fixed
In part, one end of the lever is placed on lever rotation axis and can be freely rotated around the axis, and the other end of lever places lever
The middle part of mass block, lever is equipped with lever slot；The middle part of piezoelectric sheet beam is fixed in one end of the connector, and the other end passes through
Lever connector hinge is articulated in the lever slot on lever, keeps it free to slide in slot.
Preferably, the top of the lever rotation axis and the middle part of lever are connected by oblique pull steel wire.
Preferably, it is attached between the boundary fixing piece and compressing member by boundary fixing piece hinge.
Preferably, the pedestal is cuboid pedestal with holes, and pedestal is equipped with bottom tub, the lower part of the boundary fixing piece
Equipped with the sliding block to match with bottom tub, the lower slider of boundary fixing piece can be slided along bottom tub, for adjusting spacing.
Preferably, the piezoelectric sheet beam is made of spring steel and piezoelectric ceramics.
Preferably, the mass values of the lever mass block and connector are adjustable in a certain range.
Preferably, the lever mass block, connector are respectively with the ratio of the distance between lever rotation axis in certain model
Enclose interior variation.
Preferably, the connector, lever, boundary fixing piece, compressing member and pedestal are all made of aluminum material.
Preferably, the boundary fixing piece for pushing side causes piezoelectric sheet beam buckling, is formed about center symmetrical two
A stable equilibrium position.
Compared with prior art, the beneficial effects of the present invention are:
(1) it greatly enlarged can motivate, there is good across trap dynamic response.
(2) efficiency of energy collection can be significantly improved.
(3) structure is simple, easy to use, and parameter regulation is flexible.
Detailed description of the invention
Fig. 1 is a kind of axonometric drawing of bistable state nonlinear energy collection device using lever provided by the present invention.
Fig. 2 is a kind of main view of bistable state nonlinear energy collection device using lever provided by the present invention.
Fig. 3 is that a kind of working principle of bistable state nonlinear energy collection device using lever provided by the present invention is shown
It is intended to.
Fig. 4 is the power generation performance experimental result of the non-linear power generator of conventional bi-stable provided by the embodiment of the present invention
Figure.
Fig. 5 is a kind of power generation of the bistable state nonlinear energy collection device using lever provided by the embodiment of the present invention
Performance test result figure.
Description of symbols: 1, piezoelectric sheet beam；2, connector；3, lever mass block；4, lever；5, boundary fixing piece；
6, lever connector hinge；7, lever rotation axis；8, compressing member；9, pedestal；4A, lever slot；4B, oblique pull steel wire；5A, boundary are solid
Determine part hinge；9A, bottom tub.
Specific embodiment
With reference to the accompanying drawing and specific embodiment come the present invention will be described in detail, specific embodiment therein and explanation only
For explaining the present invention, but it is not as a limitation of the invention.
The invention discloses a kind of bistable state nonlinear energy collection device using lever, including energy gathering devices and
Lever construction, the energy gathering devices use bistable state nonlinear organization, convert electric energy for mechanical energy using vibration；It is described
Lever construction is combined with bistable state nonlinear organization, for amplifying the effect of excitation to improve efficiency of energy collection.
Specifically, as depicted in figs. 1 and 2, which includes piezoelectric sheet beam 1, connector 2, lever mass block 3, lever
4, boundary fixing piece 5, lever connector hinge 6, lever rotation axis 7, compressing member 8 and pedestal 9；The boundary fixing piece 5 is equipped with
Two pieces, it is placed in the two sides of pedestal 9；The compressing member 8 also there are two, it is hinged with corresponding boundary fixing piece 5 respectively, make compressing member
8 can rotate；The piezoelectric sheet beam 1 is located between two compressing members 8, and both ends are compacted part 8 respectively and clamp and fix；Institute
It states lever rotation axis 7 to be placed in one in a block boundary fixing piece 5, one end of the lever 4 is placed on lever rotation axis 7 and can be with
It is freely rotated around the axis, the other end of lever 4 places lever mass block 3, and the middle part of lever 4 is equipped with lever slot 4A；The connection
The middle part of piezoelectric sheet beam 1 is fixed in one end of part 2, and the other end is articulated with the lever on lever 4 by lever connector hinge 6
In slot 4A, keep it free to slide in slot.
Specifically, the top with the middle part of lever 4 of the lever rotation axis 7 are connect by oblique pull steel wire 4B.
Specifically, it is attached between the boundary fixing piece 5 and compressing member 8 by boundary fixing piece hinge 5A.
Specifically, the pedestal 9 is cuboid pedestal with holes, and pedestal 9 is equipped with bottom tub 9A, the boundary fixing piece 5
Lower part be equipped with the sliding block that matches with bottom tub 9A, the lower slider of boundary fixing piece 5 can be slided along bottom tub 9A, is used for
Adjust spacing.
Specifically, the piezoelectric sheet beam 1 is made of spring steel and piezoelectric ceramics.
Specifically, the mass values of the lever mass block 3 and connector 2 are adjustable in a certain range.
Specifically, the lever mass block 3, connector 2 respectively the ratio with the distance between lever rotation axis 7 certain
Variation in range.
Specifically, the connector 2, lever 4, boundary fixing piece 5, compressing member 8 and pedestal 9 are all made of aluminum material.
Specifically, the boundary fixing piece 5 for pushing side causes 1 buckling of piezoelectric sheet beam, is formed symmetrical about center
Two stable equilibrium positions.
Embodiment
A kind of bistable state nonlinear energy collection device using lever is mainly pressed made of spring steel and piezoelectric ceramics
4, two pieces of the lever of electric thin slice beam 1, aluminum connector 2, the lever mass block 3 with certain mass, aluminum with lever slot 4A tools
There are the aluminum of the door assembly with hinge and glass in right hand and left 5A of concave and convex platform structure boundary fixing piece 5 with holes, lever connector hinge 6,7, two pieces of lever rotation axis
The cuboid of aluminum compressing member 8, aluminum with the bottom tub 9A pedestal 9 with holes that thin slice can be clamped forms.
In the present apparatus, two block boundary fixing pieces 5 are placed on pedestal 9, and its underpart sliding block can be sliding along the bottom tub 9A on pedestal 9
It moves to adjust spacing.Compressing member 8 and boundary fixing piece 5 are hinged, can be rotated compressing member 8, and compressing member 8 clamps piezoelectric sheet beam 1
Make its two fixed ends.Lever rotation axis 7 is placed in one in a block boundary fixing piece 5, and 4 one end of lever is made to be placed in lever rotation axis
Lever 4 be freely rotated can around axis, one end of connector 2 is articulated with the thick stick on lever 4 by lever connector hinge 6
In bar slot 4A, keep it free to slide in slot, while can be rotated by lever connector hinge 6, the other end is fixed on piezoelectricity
On thin slice beam 1.Lever mass block 3 is placed in the other end of lever 4.Meanwhile it will be in the top of lever rotation axis 7 and lever 4
Portion passes through oblique pull steel wire 4B connection.
The working principle of the present apparatus is as follows: as shown in figure 3, pushing boundary fixing piece 5 along bottom tub, causing piezoelectric sheet beam
1 buckling brings bistable state non-linear to be formed about symmetrical two stable equilibrium positions of Graphic Center.Work as device
When being placed on vibrating machine, by the vibrational excitation illustrated, the vibration of piezoelectric sheet beam 1 can be caused.The device and lever knot
Structure (including lever 4 and lever mass block 3) has Dynamics Coupling effect, and lever construction can amplify vibrational excitation to piezoelectric sheet
The incentive action of beam 1, so that piezoelectric sheet beam 1 be made to be easier to do the violent oscillatory motion across center line.The violent oscillatory motion energy
Amount can be converted into electric energy by piezoelectric effect and be stored.
Fig. 4 is power generation performance experimental result (the piezoelectricity output of the non-linear power generator of conventional bi-stable (no lever construction)
Voltage), Fig. 5 is the power generation performance experimental result of the embodiment of the present invention.The excitation of the two is 3Hz, 3m/s2.Parameter μ in Fig. 5
For the ratio of lever mass block 3 and 2 mass of connector, and the distance between lever mass block 3 and lever rotation axis 7 are connectors
1.5 times of distance between 2 and lever rotation axis 7.The results showed that conventional bi-stable is non-thread under same stimulation level
Property power generator voltage output be less than 0.06V, and the voltage output result of the corresponding three kinds of mass ratioes of the present invention is far longer than
0.06V, and mass ratio is bigger, and power generation performance is better.From experimental result comparison it can be found that the present invention is better than conventional bi-stable
Non-linear power generator.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to restrict the invention, all in essence of the invention
Made any modification, equivalent replacement and improvement etc., should be included in protection scope of the present invention within mind and spirit
Within.
Claims (10)
1. a kind of bistable state nonlinear energy collection device using lever, including energy gathering devices and lever construction, special
Sign is: the energy gathering devices use bistable state nonlinear organization, convert electric energy for mechanical energy using vibration；The thick stick
Rod structure is combined with bistable state energy nonlinear organization, for amplifying the effect of excitation to improve efficiency of energy collection.
2. a kind of bistable state nonlinear energy collection device using lever according to claim 1, it is characterised in that: should
Device includes piezoelectric sheet beam (1), connector (2), lever mass block (3), lever (4), boundary fixing piece (5), lever connection
Part hinge (6), lever rotation axis (7), compressing member (8) and pedestal (9)；The boundary fixing piece (5) is equipped with two pieces, is placed in pedestal
(9) two sides；The compressing member (8) also there are two, it is hinged with corresponding boundary fixing piece (5) respectively, make compressing member (8) can be with
Rotation；The piezoelectric sheet beam (1) is located between two compressing members (8), and both ends are compacted part (8) respectively and clamp and fix；
The lever rotation axis (7) is placed in one in a block boundary fixing piece (5), and one end of the lever (4) is placed in lever rotation axis
(7) it can be freely rotated on and around the axis, the other end of lever (4) places lever mass block (3), and the middle part of lever (4) is equipped with
Lever slot (4A)；The middle part of piezoelectric sheet beam (1) is fixed in one end of the connector (2), and the other end passes through lever connector
Hinge (6) is articulated with the lever slot (4A) on lever (4) Nei, keeps it free to slide in slot.
3. a kind of bistable state nonlinear energy collection device using lever according to claim 2, it is characterised in that: institute
The top for stating lever rotation axis (7) is connect with the middle part of lever (4) by oblique pull steel wire (4B).
4. a kind of bistable state nonlinear energy collection device using lever according to claim 2, it is characterised in that: institute
It states and is attached between boundary fixing piece (5) and compressing member (8) by boundary fixing piece hinge (5A).
5. a kind of bistable state nonlinear energy collection device using lever according to claim 2, it is characterised in that: institute
Stating pedestal (9) is cuboid pedestal with holes, and pedestal (9) is equipped with bottom tub (9A), and the lower part of the boundary fixing piece (5) is equipped with
The lower slider of the sliding block to match with bottom tub (9A), boundary fixing piece (5) can be slided along bottom tub (9A), for adjusting
Spacing.
6. a kind of bistable state nonlinear energy collection device using lever according to claim 2, it is characterised in that: institute
Piezoelectric sheet beam (1) is stated to be made of spring steel and piezoelectric ceramics.
7. a kind of bistable state nonlinear energy collection device using lever according to claim 2, it is characterised in that: institute
It states lever mass block (3) and the mass values of connector (2) is adjustable in a certain range.
8. a kind of bistable state nonlinear energy collection device using lever according to claim 2, it is characterised in that: institute
The ratio of lever mass block (3), connector (2) respectively with the distance between lever rotation axis (7) is stated to change in a certain range.
9. a kind of bistable state nonlinear energy collection device using lever according to claim 2, it is characterised in that: institute
It states connector (2), lever (4), boundary fixing piece (5), compressing member (8) and pedestal (9) and is all made of aluminum material.
10. a kind of bistable state nonlinear energy collection device using lever according to any one of claim 2 to 9,
It is characterized by: pushing the boundary fixing piece (5) of side, piezoelectric sheet beam (1) buckling is caused, is formed symmetrical about center
Two stable equilibrium positions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133834.2A CN109728746B (en) | 2019-02-22 | 2019-02-22 | Bistable nonlinear energy collecting device using lever |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133834.2A CN109728746B (en) | 2019-02-22 | 2019-02-22 | Bistable nonlinear energy collecting device using lever |
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| CN109728746B CN109728746B (en) | 2020-02-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934581A (en) * | 2020-06-18 | 2020-11-13 | 重庆大学 | Energy recovery device utilizing piezoelectric stack to capture energy |
| CN115051527A (en) * | 2022-06-27 | 2022-09-13 | 华中科技大学 | Bistable nonlinear energy harvesting devices and methods of use |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150135869A1 (en) * | 2012-05-25 | 2015-05-21 | Cambridge Enterprise Limited | Energy-harvesting apparatus and method |
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2019
- 2019-02-22 CN CN201910133834.2A patent/CN109728746B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150135869A1 (en) * | 2012-05-25 | 2015-05-21 | Cambridge Enterprise Limited | Energy-harvesting apparatus and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934581A (en) * | 2020-06-18 | 2020-11-13 | 重庆大学 | Energy recovery device utilizing piezoelectric stack to capture energy |
| CN115051527A (en) * | 2022-06-27 | 2022-09-13 | 华中科技大学 | Bistable nonlinear energy harvesting devices and methods of use |
| CN115051527B (en) * | 2022-06-27 | 2024-05-24 | 华中科技大学 | Bistable nonlinear energy harvesting device and method of use thereof |
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| CN109728746B (en) | 2020-02-07 |
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