CN107508495A - A kind of piezoelectricity electromagnetic vibration power generation device - Google Patents
A kind of piezoelectricity electromagnetic vibration power generation device Download PDFInfo
- Publication number
- CN107508495A CN107508495A CN201710749760.6A CN201710749760A CN107508495A CN 107508495 A CN107508495 A CN 107508495A CN 201710749760 A CN201710749760 A CN 201710749760A CN 107508495 A CN107508495 A CN 107508495A
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- Prior art keywords
- permanent magnet
- magnet
- bistable state
- power generation
- generation device
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- 238000010248 power generation Methods 0.000 title claims description 14
- 239000000758 substrate Substances 0.000 claims abstract description 3
- 239000000725 suspension Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000000295 complement effect Effects 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1869—Linear generators; sectional generators
- H02K7/1876—Linear generators; sectional generators with reciprocating, linearly oscillating or vibrating parts
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a kind of piezoelectricity electromagnetic type TRT, the device includes bistable state piezoelectric cantilever, magnetic gives birth to electric structure and accessory structure；Described bistable state piezoelectric cantilever one end is fixed, and piezoelectric layer is pasted onto the root of basic unit, and lead is drawn respectively from piezoelectric layer upper surface and substrate surface.Vibration occurs in ambient vibration incentive action lower piezoelectric cantilever beam and produces voltage.Magnet II pumps in coil to be made to produce variation magnetic field around coil, so as to produce induced voltage in coil.The band moving magnet I that pumps of magnet II moves, and makes piezoelectric cantilever that complicated motion occur under the collective effect of ambient vibration excitation and magnetic force, produces larger electric energy；The motion of magnet I promotes the motion of magnet II again, greatly improves the efficiency of Electromagnetic generation.Bistable state piezo-electric generating is effectively combined by the present invention with Electromagnetic generation to be complementary to one another, and substantially increases the overall electromechanical conversion efficiency of system, greatly improves the generating capacity of system.
Description
Technical field
The present invention relates to a kind of piezoelectricity electromagnetic vibration power generation device, effectively can mutually tie piezo-electric generating with Electromagnetic generation
Close, belong to green regenerating environmental protection new energy field.
Background technology
With the fast development of microelectronics and wireless network, energy is captured from environment and is low power consuming devices power supply or is storage
Battery powered turns into urgent demand；Conventional batteries, which are powered, has a series of drawback, for example short life, needs are regular more
Change, pollute environment etc.；The mechanical energy of vibration mode in nature is changed into electric energy, the drawbacks of being both avoided that conventional batteries, again
Can be that low-power consumption electrical appliance is powered；Electromagnetic generation is to produce electric energy by wire cutting magnetic induction line, by Electromagnetic generation and piezoelectricity
Generate electricity the electromechanical conversion efficiency for organically combining and can effectively increasing system.Therefore, it is organic using piezo-electric generating and Electromagnetic generation
Combination be necessary, can effectively increase its generated energy.
Piezoelectricity electromagnetic vibration power generation device can sufficiently utilize the vibrational energy in nature, and its application is very
By force, the patent about piezo-electric generating is relatively fewer both at home and abroad, and the patent that piezo-electric generating is combined with Electromagnetic generation is even more very
It is few.Chinese patent (publication number 104821743A) discloses a kind of multi-mode vibration generating device, and the device is in conventional bi-stable
On the basis of piezo-electric generating coil is added on the periphery of two opposed magnets.Make magnet online during vibration in piezoelectric cantilever beam
Internal vibration is enclosed, wire cutting magnetic induction line produces electric energy.Piezo-electric generating is combined with Electromagnetic generation, greatly improves the generating of system
Amount.Chinese patent (publication number CN101764531A) discloses a kind of multi-operation mode piezoelectric generator, would operate in stretching and
Compression mode is integrated in the different parts of piezoelectric generator with the piezoelectric element for being operated in impact mode.When generator up-down vibration
When, piezoelectric patches or because tapping or because stretching and compressing producing electric energy.United States Patent (USP) (publication number WO2010151738A3) is open
A kind of bistable state piezoelectric cantilever generators, have effectively widened the resonance bands of cantilever beam, but the degree of bandwidth broadning is simultaneously
It is not very big.
The content of the invention
In order to effectively increase the efficiency that the mechanical energy of vibration mode is converted into electric energy, this patent provides a kind of piezoelectric electro
Magnetic-type TRT, piezo-electric generating is combined well with Electromagnetic generation, the two is mutually promoted, and the energy for greatly improving system turns
Change efficiency.Generation electric energy is deformed upon in outer incentive action lower piezoelectric beam, magnet pumps in coil makes coil all
Enclose and produce variation magnetic field, so as to produce induced voltage in coil.Magnet movement frequency in the magnet and coil of cantilever beam end
Rate is different, and the two has non-linear magnetic force again, two magnet movements is mutually promoted and greatly improves piezo-electric generating and Electromagnetic generation
Efficiency, and then the generating efficiency of system is greatly improved.
To achieve these goals, the technical solution adopted by the present invention is a kind of piezoelectricity electromagnetic vibration power generation device, should
Device includes bistable state piezoelectric cantilever, magnetic gives birth to electric structure and accessory structure；Bistable state piezoelectric cantilever includes lead 1, piezoelectricity
Layer 2, basic unit 3, permanent magnet I 4 and permanent magnet II 6；Magnetic gives birth to electric structure and accessory structure include permanent magnet II 6, guide rail 7,
Support 9, coil 10, permanent magnet III 5 and permanent magnet IV 8.One end of the bistable state piezoelectric cantilever is fixed, piezoelectric layer 2
The root of basic unit 3 is pasted onto, lead 1 is drawn respectively from the upper surface of piezoelectric layer 2 and substrate surface 3.Bistable state piezoelectric cantilever
A permanent magnet I 4 is pasted in free end, and magnetic is given birth to the one end of support 9 of electric structure with coil 10 and fixed, and setting one among support 9 leads
Rail 7, permanent magnet II 6 are enclosed on guide rail 7.Permanent magnet III 5 and permanent magnet IV 8 are separately fixed at the upper of permanent magnet II 6
Lower both sides, permanent magnet III 5 and permanent magnet IV 8 with permanent magnet II 6 is mutually exclusive permanent magnet II 6 is suspended in coil
Between.Permanent magnet II 6 and permanent magnet I 4 are in the same horizontal line, mutually exclusive staggered relatively.
There is a determining deviation in the permanent magnet III 5 and permanent magnet II 6, permanent magnet IV 8 exists with permanent magnet II 6
One determining deviation, permanent magnet II 6 are suspended among coil.
The permanent magnet II 6 is enclosed on guide rail 7 by an aperture, orifice surface and the surface of guide rail 7 of permanent magnet II 6
It is smooth.
There is a determining deviation in the permanent magnet I 4, bistable state piezoelectric cantilever can be made to swash small with permanent magnet II 6
The dynamic lower holding bistable motion of vibrator.
A determining deviation be present with permanent magnet II 6 in the support 9.
The coil 10 is wrapped in the surface of support 9, by the way of multi-lay winding.From one end of support 9 around support 9
Surface wrap is reached after the other end of support 9 again towards original one ends wound, and so on.
The material of the piezoelectric layer 2 is the PVDF after PZT or polarization.
The material of the basic unit 3 is one kind in brass, carbon fiber or aluminium alloy.
Compared with prior art, the beneficial effects of the invention are as follows：
1. making magnet suspend using the repulsion between magnet in the present invention, transport suspension magnet using magnetic force and dynamic excitation
Dynamic, suspension magnet constantly adjusts the movement degree of bistable state piezoelectric cantilever, produces larger electric energy.
2. on the one hand movement degree that the up and down motion of suspension magnet can constantly adjust bistable state piezoelectric cantilever carries significantly
The generating capacity of high bistable state piezoelectric cantilever, one side suspension magnet pumps in coil to be made to produce around coil
Variation magnetic field, so as to produce induced voltage in coil.The magnet of cantilever beam end is different from the magnet movement frequency in coil,
There is non-linear magnetic force in the two, two magnet movements is mutually promoted and greatly improve the efficiency of piezo-electric generating and Electromagnetic generation again.This
Bistable state piezo-electric generating is effectively combined and is complementary to one another by invention with Electromagnetic generation, substantially increases the overall data-collection of system
Efficiency, greatly improve the generating capacity of system.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
In figure：1st, lead, 2, piezoelectric layer, 3, basic unit, 4, permanent magnet I, 5, permanent magnet III, 6, permanent magnet II, 7,
Guide rail, 8, permanent magnet IV, 9, support, 10, coil.
Embodiment
The present invention is described in further detail with reference to embodiment.
As shown in figure 1, a kind of piezoelectricity electromagnetic vibration power generation device, the device includes piezoelectric cantilever, magnetic gives birth to electric structure
And accessory structure；Piezoelectric cantilever bag lead 1, piezoelectric layer 2, basic unit 3, permanent magnet I 4, permanent magnet II 6；Magnetic gives birth to electric structure
And accessory structure includes permanent magnet II 6, guide rail 7, support 9, coil 10, permanent magnet III 5, permanent magnet IV 8.The bistable
State piezoelectric cantilever one end is fixed, and piezoelectric layer 2 is pasted onto the root of basic unit 3, and lead 1 is from the upper surface of piezoelectric layer 2 and basic unit's table
Draw respectively in face 3.Paste a permanent magnet I 4 in the bistable state piezoelectric cantilever free end.It is wired that the magnetic gives birth to electric structure band
One end of support 9 of circle 10 is fixed, and a guide rail 7 is set among support 9, permanent magnet II 6 is enclosed on guide rail 7.Permanent magnet III 5 and forever
Long magnet IV 8 is separately fixed at the both sides up and down of permanent magnet II 6, permanent magnet III 5 and permanent magnet IV 8 and permanent magnet II
6 mutually exclusive make permanent magnet II 6 be suspended among coil.Permanent magnet II 6 and permanent magnet I 4 in the same horizontal line, phase
Mutually repel staggered relatively.
The permanent magnet III 5 and permanent magnet IV 8 have certain spacing with permanent magnet II 6 makes permanent magnet II 6
It is suspended among coil.
The permanent magnet II 6 has an aperture to be enclosed on guide rail 7, orifice surface and the surface light of guide rail 7 of permanent magnet II 6
It is sliding.
There is certain spacing in the permanent magnet I 4, can make bistable state piezoelectric cantilever small with permanent magnet II 6
Bistable motion is kept under excited vibration.
Certain spacing be present with permanent magnet II 6 in the support 9.
The coil 10 is wrapped in the surface of support 9, by the way of multi-lay winding.From one end of support 9 around support 9
Surface wrap is reached after the other end of support 9 again towards original one ends wound, and so on.
The material of the piezoelectric layer 2 is the PVDF after PZT or polarization.
The material of the basic unit 3 is brass, carbon fiber, the one kind therein such as aluminium alloy.
Vibrated in ambient vibration incentive action lower piezoelectric cantilever beam, magnet II 6 pumps and made around coil
Produce variation magnetic field and induced voltage is produced in coil.The band moving magnet I 4 that pumps of magnet II 6 moves, and is shaken in environment
Make piezoelectric cantilever that complicated motion occur under the collective effect of dynamic excitation and magnetic force, suspension magnet constantly adjusts bistable state piezoelectricity
The movement degree of cantilever beam, produce larger electric energy.The motion of magnet I 4 promotes pumping for magnet II 6, two magnet again
Motion, which is mutually promoted, greatly improves the efficiency of piezo-electric generating and Electromagnetic generation.
In summary, bistable state piezo-electric generating is effectively combined by the present invention with Electromagnetic generation is complementary to one another, and greatly improves
The overall electromechanical conversion efficiency of system, greatly improve the generating capacity of system.
Above-mentioned embodiment is only schematic, rather than restricted, is not departing from the situation of present inventive concept
Under, many variations can also be made.Belong to the protection category of the present invention.
Claims (7)
- A kind of 1. piezoelectricity electromagnetic vibration power generation device, it is characterised in that：The device includes bistable state piezoelectric cantilever, magnetic life electricity Structure and accessory structure；Bistable state piezoelectric cantilever bag lead (1), piezoelectric layer (2), basic unit (3), permanent magnet I (4) and permanent Magnet II (6)；Magnetic gives birth to electric structure and accessory structure includes permanent magnet II (6), guide rail (7), support (9), coil (10), permanent Magnet III (5) and permanent magnet IV (8)；One end of the bistable state piezoelectric cantilever is fixed, and piezoelectric layer (2) is pasted onto basic unit (3) root, lead (1) are drawn respectively from piezoelectric layer (2) upper surface and substrate surface (3)；The bistable state piezoelectric cantilever Paste a permanent magnet I (4) in the free end of beam；The magnetic is given birth to support (9) one end of electric structure with coil (10) and fixed, and props up A guide rail (7) is set among frame (9), permanent magnet II (6) is enclosed on guide rail (7)；Permanent magnet III (5) and permanent magnet IV (8) It is separately fixed at the both sides up and down of permanent magnet II (6), permanent magnet III (5) and permanent magnet IV (8) and permanent magnet II (6) It is mutually exclusive permanent magnet II (6) is suspended among coil；Permanent magnet II (6) is with permanent magnet I (4) in same horizontal line On, it is mutually exclusive staggered relatively.
- A kind of 2. piezoelectricity electromagnetic vibration power generation device according to claim 1, it is characterised in that：According to claim 1 A kind of piezoelectricity electromagnetic vibration power generation device, it is characterised in that：The permanent magnet III (5) and permanent magnet II (6) have one There is a determining deviation in determining deviation, permanent magnet IV (8), permanent magnet II (6) is suspended among coil with permanent magnet II (6).
- 3. according to a kind of piezoelectricity electromagnetic vibration power generation device of claim 1, it is characterised in that：Suspension permanent magnet II (6) with There is certain spacing in permanent magnet I (4), bistable state piezoelectric cantilever can be made to keep bistable state to transport under small excited vibration It is dynamic.
- 4. according to a kind of piezoelectricity electromagnetic vibration power generation device of claim 1, it is characterised in that：The permanent magnet II (6) is logical Cross an aperture to be enclosed on guide rail (7), the orifice surface of permanent magnet II (6) and guide rail (7) surface are smooth.
- 5. according to a kind of piezoelectricity electromagnetic vibration power generation device of claim 1, it is characterised in that：Suspension permanent magnet II (6) with Certain interval be present between (9) in support.
- 6. according to a kind of piezoelectricity electromagnetic vibration power generation device of claim 1, it is characterised in that：The material of the piezoelectric layer (2) PVDF after being PZT or polarizing；Basic unit (3) material is one kind in brass, carbon fiber or aluminium alloy.
- 7. according to a kind of piezoelectricity electromagnetic vibration power generation device of claim 1, it is characterised in that：Suspension permanent magnet II (6) Move up and down and interacted with the permanent magnet I (4) of cantilever beam end, mutually promoted；Bistable state piezoelectric cantilever is set to coordinate certainly While increasing generating capacity, the up and down motion increase magnetic for being greatly facilitated suspension magnet again gives birth to the generating capacity of electric part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710749760.6A CN107508495A (en) | 2017-08-28 | 2017-08-28 | A kind of piezoelectricity electromagnetic vibration power generation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710749760.6A CN107508495A (en) | 2017-08-28 | 2017-08-28 | A kind of piezoelectricity electromagnetic vibration power generation device |
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| CN107508495A true CN107508495A (en) | 2017-12-22 |
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| CN201710749760.6A Pending CN107508495A (en) | 2017-08-28 | 2017-08-28 | A kind of piezoelectricity electromagnetic vibration power generation device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023501A (en) * | 2017-12-28 | 2018-05-11 | 西华师范大学 | A kind of combined-type magnetic suspension wideband vibration energy collector using structure for amplifying |
| CN108054897A (en) * | 2017-12-29 | 2018-05-18 | 浙江工业大学 | Piezomagnetic cantilever beam energy gathering apparatus |
| CN108325831A (en) * | 2018-05-04 | 2018-07-27 | 新乡市东振机械制造有限公司 | A kind of vibrating screen being convenient for changing sieve |
| CN109194086A (en) * | 2018-09-19 | 2019-01-11 | 大连理工大学 | A kind of combined type energy accumulator of non-linear magnetomechanical coupling |
| CN109600013A (en) * | 2019-02-26 | 2019-04-09 | 成都云天智轨科技有限公司 | Magnetic confinement vibrating power-generation equipment and vibrating power-generation system |
| CN110336442A (en) * | 2019-04-29 | 2019-10-15 | 中北大学 | A kind of micro- energy resource collecting device of magnetoelectricity Piezoelectric anisotropy |
| CN110365184A (en) * | 2018-04-11 | 2019-10-22 | 天津大学 | A kind of bistable state multi-mode vibration energy collector having raising frequency technology |
| EP3621187A1 (en) * | 2019-02-12 | 2020-03-11 | Ventus Engineering GmbH | Hybrid energy harvesting unit and use hereof |
| CN110912371A (en) * | 2019-11-15 | 2020-03-24 | 北京机械设备研究所 | Multi-mechanism combined type broadband vibration energy harvester |
| CN111355355A (en) * | 2020-04-07 | 2020-06-30 | 南京邮电大学 | Wearable piezoelectric-electromagnetic composite energy harvesting vibration device |
| CN111987934A (en) * | 2020-08-14 | 2020-11-24 | 河海大学 | Cantilever beam vibration power generation device |
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| CN104836478A (en) * | 2015-05-19 | 2015-08-12 | 北京理工大学 | Piezoelectric-electromagnetic composite low-frequency broadband energy harvester |
| CN105375818A (en) * | 2015-12-11 | 2016-03-02 | 中国地质大学（武汉） | Dual-crank arm type piezoelectric-electromagnetic composite power generation device |
| CN106123914A (en) * | 2016-06-15 | 2016-11-16 | 浙江师范大学 | A kind of self-powered vehicle positioning is followed the tracks of and alarm device |
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| CN202503456U (en) * | 2012-03-23 | 2012-10-24 | 东南大学 | Piezoelectricity-magnetoelectricity mixing energy harvesting device |
| CN104821743A (en) * | 2015-04-22 | 2015-08-05 | 北京工业大学 | Multi-mode vibration power generation device |
| CN104836478A (en) * | 2015-05-19 | 2015-08-12 | 北京理工大学 | Piezoelectric-electromagnetic composite low-frequency broadband energy harvester |
| CN105375818A (en) * | 2015-12-11 | 2016-03-02 | 中国地质大学（武汉） | Dual-crank arm type piezoelectric-electromagnetic composite power generation device |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023501A (en) * | 2017-12-28 | 2018-05-11 | 西华师范大学 | A kind of combined-type magnetic suspension wideband vibration energy collector using structure for amplifying |
| CN108054897A (en) * | 2017-12-29 | 2018-05-18 | 浙江工业大学 | Piezomagnetic cantilever beam energy gathering apparatus |
| CN108054897B (en) * | 2017-12-29 | 2023-11-07 | 浙江工业大学 | Piezomagnetic cantilever beam vibration energy collecting device |
| CN110365184A (en) * | 2018-04-11 | 2019-10-22 | 天津大学 | A kind of bistable state multi-mode vibration energy collector having raising frequency technology |
| CN108325831A (en) * | 2018-05-04 | 2018-07-27 | 新乡市东振机械制造有限公司 | A kind of vibrating screen being convenient for changing sieve |
| CN109194086B (en) * | 2018-09-19 | 2019-12-27 | 大连理工大学 | Nonlinear magnet-machine coupled composite energy harvester |
| CN109194086A (en) * | 2018-09-19 | 2019-01-11 | 大连理工大学 | A kind of combined type energy accumulator of non-linear magnetomechanical coupling |
| WO2020164756A1 (en) * | 2019-02-12 | 2020-08-20 | Ventus Engineering GmbH | Hybrid energy harvesting unit and use hereof |
| EP3621187A1 (en) * | 2019-02-12 | 2020-03-11 | Ventus Engineering GmbH | Hybrid energy harvesting unit and use hereof |
| US20220109385A1 (en) * | 2019-02-12 | 2022-04-07 | Ventus Engineering GmbH | Hybrid energy harvesting unit and use thereof |
| CN109600013B (en) * | 2019-02-26 | 2019-12-24 | 成都云天智轨科技有限公司 | Magnetic confinement vibration power generation equipment and vibration power generation system |
| CN109600013A (en) * | 2019-02-26 | 2019-04-09 | 成都云天智轨科技有限公司 | Magnetic confinement vibrating power-generation equipment and vibrating power-generation system |
| CN110336442A (en) * | 2019-04-29 | 2019-10-15 | 中北大学 | A kind of micro- energy resource collecting device of magnetoelectricity Piezoelectric anisotropy |
| CN110912371A (en) * | 2019-11-15 | 2020-03-24 | 北京机械设备研究所 | Multi-mechanism combined type broadband vibration energy harvester |
| CN111355355A (en) * | 2020-04-07 | 2020-06-30 | 南京邮电大学 | Wearable piezoelectric-electromagnetic composite energy harvesting vibration device |
| CN111987934A (en) * | 2020-08-14 | 2020-11-24 | 河海大学 | Cantilever beam vibration power generation device |
| CN111987934B (en) * | 2020-08-14 | 2024-04-02 | 河海大学 | Cantilever beam vibration power generation device |
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Application publication date: 20171222 |
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