CN106899234B - A kind of multidirectional energy gathering apparatus of piezoelectric type - Google Patents
A kind of multidirectional energy gathering apparatus of piezoelectric type Download PDFInfo
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- CN106899234B CN106899234B CN201710299690.9A CN201710299690A CN106899234B CN 106899234 B CN106899234 B CN 106899234B CN 201710299690 A CN201710299690 A CN 201710299690A CN 106899234 B CN106899234 B CN 106899234B
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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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- 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
- H02N2/188—Vibration harvesters adapted for resonant operation
Abstract
The invention proposes a kind of multidirectional energy gathering apparatus of piezoelectric type, collecting direction existing for existing piezoelectric type energy collection device is single and the narrow technical problem of frequency bandwidth for solving, including fixing seat, bracket arranged on the fixing seat, inner beam, outer beam, elastic element, support rod, ring-type element, the first magnetic block and the second magnetic block；Inner beam includes the first elastic base plate, the first piezoelectric patches for being pasted onto the first elastic base plate fixing end and the first electrode being pasted on the first piezoelectric patches；Outer beam includes the second elastic base plate, the second piezoelectric patches for being pasted onto the second elastic base plate fixing end and the second electrode being pasted on the second piezoelectric patches；Second elastic base plate is fixed on bracket, and the first elastic base plate, elastic element and support rod are located in the notch of the second elastic base plate, and the first elastic base plate is vertical with the second elastic base plate；The fixing end of first elastic base plate and the free end of elastic element are fixed, and the free end of support rod is suspended on by ring-type element.
Description
Technical field
The invention belongs to energy collection technology fields, are related to a kind of energy collecting device, and in particular to a kind of piezoelectric type is more
To energy gathering apparatus, it can be used for the collection to multi-direction vibrational energy and complex vibration energy.
Background technique
Energy collecting device can obtain energy from the environment of surrounding, and be converted into electric energy, reached energy and returned
The purpose received and reused.With the fast development of wireless sensor technology and microelectric technique, the demand to micro- energy is got over
Come more urgent.Traditional battery power supply mode, the production due to replacing the frequent and maintenance cost high of battery, to the mankind
Many inconvenience is brought with life.And energy collecting device can be collected the energy unemployed in environment, is sharp again
With to carry out self-powered for low power dissipation electron equipment and device, effective solution is with problems brought by battery.
Therefore, the extensive concern of domestic and foreign scholars is caused.
Currently, the energy source that can be obtained from environment mainly includes solar energy, thermal gradient energy and mechanical vibrational energy,
In, mechanical vibrational energy is generally existing, and is easily converted to electric energy, is that one kind has prospect and very efficient energy very much
Acquisition modes.The type for obtaining mechanical vibrational energy mainly has piezoelectric type, electrostatic and electromagnetic type, wherein piezoelectric type vibration energy
Collector is measured with easy of integration, energy output density is big, is not necessarily to external power supply, advantages of simple structure and simple, it is considered to be most have uncommon
Hope the new energy-provision way of substitution conventional batteries.Its structure type has beam type, Cymbal formula, stack etc., cantilever beam knot
Structure is the mainstream structure of piezoelectric energy collector, has been achieved for some research achievements.
Traditional piezoelectric type vibration energy collecting device, including pedestal, elastic base plate, piezoelectric patches, mass block and two electricity
Pole.One end of elastic base plate is fixed on the base, and a mass block is arranged in the other end, for adjusting piezoelectric energy collecting device itself
Resonance frequency.Wherein piezoelectric patches is uniformly pasted onto elastic base plate upper surface, when perceiving external vibration, according to positive piezoelectricity
Effect just has charge output on piezoelectric patches surface, and two electrodes for being welded on piezoelectric patches upper surface and elastic base plate lower surface will
The charge on piezoelectric patches surface is exported to rear end power storage or electrical appliance equipment, to effectively turn mechanical vibrational energy in environment
It is changed to electric energy and is stored and utilized.Such as：Authorization Notice No. is CN103269179B, entitled " a kind of piezoelectric patches and vibration
The patent of invention of energy collector ", discloses a kind of piezoelectric patches and vibrational energy collector, including piezoelectric patches, for fixing
The pedestal of piezoelectric patches and the mass block for being set to piezoelectric patches free end, the piezoelectric patches include piezoelectric body and are coated on piezoelectric patches sheet
Body upper and lower surfaces and upper surface electrode, lower surface electrode and two side electrodes on two sides, wherein two sides
Electrode and upper surface electrode, lower surface electrode it is vertical and between be not connected to, each electrode of piezoelectric patches distinguishes extraction wire conduct
Output interface.The collector drives seat vibration using the low-frequency vibration in local environment, so that piezoelectric patches generates Curved
Become.The piezoelectric type energy collection device has the advantages of simple structure and easy realization, but since frequency bandwidth is smaller, resonance frequency is higher and only
The vibrational energy of single direction can be collected, and the direction of vibration in environment is changeable, and environmental vibration frequency is lower.Therefore, traditional
Piezoelectric type energy collection device has biggish limitation, is unable to satisfy efficient collection of energy demand.
In order to improve the efficiency of energy collection of conventional piezoelectric formula energy collecting device, scientific research personnel proposes a variety of improvement and passes
The method for energy collecting device performance of uniting.Such as：Authorization Notice No. is CN103647475B, a kind of entitled " broadband piezoelectric vibration
The patent of invention of energy collection device " provides a kind of broadband piezoelectric energy gathering apparatus, including at least two gusts
Cantilever beam, mass block, collision tip, fixed bracket, piezoelectric patches and the substrate of column distribution；One end of cantilever beam and fixed bracket connect
It connects, the free end lower surface of cantilever beam is fixed with collision tip；Mass block and cantilever beam correspond, and are fixed on cantilever beam
Free end；Piezoelectric patches is located at substrate surface；Piezoelectric patches is provided with top electrode and lower electrode；Substrate is located at the cantilever beam of array distribution
Underface, and be fixed on fixed bracket.By the way that extraneous vibration is changed into cantilever beam to substrate using array cantilever beam
Mechanical impact, the piezoelectric patches for making to be set to substrate surface generates deformation, and then is converted into electrical energy form output.According to actual rings
Vibration source frequency range in border designs the number and resonance frequency of cantilever beam, makes the resonant frequency range of array cantilever beam
Vibration source frequency bandwidth in overlay environment realizes the collection of energy of wideband.Authorization Notice No. is CN102064745B, entitled
The patent of invention of " a kind of bistable piezoelectric cantilever a period of time device " can make piezoelectricity using the non-linear repulsion between permanent magnet
Cantilever beam a period of time constitutes a nonlinear bistable system, and bistable state piezoelectric cantilever a period of time can generate at random under certain condition
Covibration can significantly improve the piezoelectric vibration power generation efficiency under broad band low frequency vibration environment, particularly suitable for broadband, low
Frequently, the efficient capture of low amplitude vibrations energy.Although the above device for collecting piezoelectric vibration energy improves frequency band to a certain extent
Width, but the vibrational energy of single direction can only be collected, therefore there is certain limitation.
Summary of the invention
It is an object of the invention to overcome the problems of the above-mentioned prior art, a kind of multidirectional vibrational energy of piezoelectric type is proposed
Collection device is measured, for solving present in existing piezoelectric type vibration energy collecting device because collection of energy direction is single, frequency band
The low technical problem of efficiency of energy collection caused by width is small.
To achieve the goals above, the technical scheme adopted by the invention is as follows：
A kind of multidirectional energy gathering apparatus of piezoelectric type, including the fixing seat 1, bracket being arranged in fixing seat 12, interior
Beam 3, outer beam 4, elastic element 5, support rod 6, ring-type element 7, the first magnetic block 8 and the second magnetic block 9, wherein：
The inner beam 3, including the first elastic base plate 31, be pasted onto 31 fixing end one end plate face of the first elastic base plate
One piezoelectric patches 32 and the first electrode 33 that is pasted on the first piezoelectric patches 32；First elastic base plate 31 uses lightweight conductive square
Shape plate；First piezoelectric patches 32 is using the material with direct piezoelectric effect；The first electrode 33 uses metallic conduction material
Material, for exporting the electric energy of the first piezoelectric patches 32 generation；
The outer beam 4, including the second elastic base plate 41, be pasted onto 41 fixing end one end plate face of the second elastic base plate
Two piezoelectric patches 42 and the second electrode 43 that is pasted on the second piezoelectric patches 42；Second elastic base plate 41 uses lightweight conductive square
Shape plate, fixing end are provided with rectangular notch, form U-shaped structure；Second piezoelectric patches 42 is using with direct piezoelectric effect
Material；The second electrode 43 uses conductive metal material, for exporting the electric energy of the second piezoelectric patches 42 generation；
Second elastic base plate 41 is fixed on bracket 2, deviates equilbrium position for generating under the conditions of ambient vibration
The direction y vibration, and electric energy is translated by the second piezoelectric patches 42；The elastic element 5, which is fixed on bracket 2, to be located at
The indentation, there of second elastic base plate 41, the vibrational energy for sensing external environment in the direction x, and pass it to inner beam 3；It is described
Support rod 6 is fixed on the top of elastic element 5；First elastic base plate 31 is located in the notch of the second elastic base plate 41, and
Vertical with the second elastic base plate 41, the fixing end of first elastic base plate 31 and the free end of elastic element 5 are fixed, and pass through ring
Shape element 7 is suspended on the free end of support rod 6, for generating the vibration for deviateing the direction z of equilbrium position under the conditions of ambient vibration
It is dynamic, and electric energy is translated by the first piezoelectric patches 32；First magnetic block 8 is fixed on the freedom of the first elastic base plate 31
End, for adjusting the resonance frequency of inner beam 3；Second magnetic block 9 is fixed on the free end of the second elastic base plate 41, for adjusting
The resonance frequency of outer beam 4 is saved, and realizes the magnetic coupling between the first magnetic block 8.
A kind of above-mentioned multidirectional energy gathering apparatus of piezoelectric type, first piezoelectric patches 32 are pasted onto the first bullet
The one or both sides of property 31 plate face of substrate.
A kind of above-mentioned multidirectional energy gathering apparatus of piezoelectric type, second piezoelectric patches 42 are pasted onto the second bullet
The one or both sides of property 41 plate face of substrate.
A kind of above-mentioned multidirectional energy gathering apparatus of piezoelectric type, second elastic base plate 41, U-shaped structure are pair
Claim U-shaped structure.
A kind of above-mentioned multidirectional energy gathering apparatus of piezoelectric type, first magnetic block 8 are fixed on the first elastic base
The middle position of 31 free end of plate.
A kind of above-mentioned multidirectional energy gathering apparatus of piezoelectric type, second magnetic block 9 are fixed on the second elastic base
The middle position of 41 free end of plate.
Compared with prior art, the present invention having the following advantages that：
1. the present invention is due to that can collect vertical using the first elastic base plate structure fixed vertical with the second elastic base plate
In the vibrational energy of the first elastic base plate plate face and two orthogonal directions perpendicular to the second elastic base plate plate face, while using first
The structure that the fixing end of elastic base plate is connected with elastic element can be felt since elastic element can be used as mechanical energy buffer device
Know that external environment in the vibrational energy in the direction x, and passes it to inner beam, trigger in beam vibration, to make the energy collecting device
The vibrational energy for being parallel to elastic base plate plate face can be collected, therefore has expanded the collection of energy dimension of energy collecting device, and it is existing
There is the energy collecting device that can only collect single direction in technology to compare, effectively improves efficiency of energy collection.
2. the present invention uses the first magnetic block and the second magnetic block, by intercoupling between two magnetic blocks, can incite somebody to action
The energy coupling of inner beam gives outer beam, and inner beam is prevented to be broken because deformation is excessive.Meanwhile the magnetic coupling between two magnetic blocks
It can cause frequency upconversion, to widen the frequency bandwidth of the energy collecting device, further improve collection of energy effect
Rate.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the specific embodiment of the invention；
Fig. 2 is the exploded orthogonal view of any direction vibrational energy in three dimensions.
Specific embodiment
Below in conjunction with drawings and concrete examples, invention is further described in detail.
Referring to Fig.1, the multidirectional energy gathering apparatus of a kind of piezoelectric type including fixing seat 1, is arranged in fixing seat 1
Bracket 2, inner beam 3, outer beam 4, elastic element 5, support rod 6, ring-type element 7, the first magnetic block 8 and the second magnetic block 9, wherein：
Inner beam 3 including the first elastic base plate 31, is pasted onto the first piezoelectric patches 32 of 31 fixing end of the first elastic base plate and is pasted onto first
First electrode 33 on piezoelectric patches 32；Outer beam 4 including the second elastic base plate 41, is pasted onto 41 fixing end of the second elastic base plate
Second piezoelectric patches 42 and the second electrode 43 that is pasted on the second piezoelectric patches 42, wherein the fixing end of the second elastic base plate is provided with
Rectangular notch forms U-shaped structure.The U-shaped structure can be symmetrical structure or unsymmetric structure, and symmetrical U-shaped knot is used in this example
Structure.Fixing seat 1 uses the acrylic board material of cuboid-type in this example；Bracket 2 still anticipates the knot of system using acryl plates
Structure；First elastic base plate 31 and the second elastic base plate 41 are all made of the rectangle copper sheet of lightweight；In order to guarantee that inner beam 3 and outer beam 4 have
There are biggish elasticity modulus and direct capacitance, the first elastic base plate 31 and the second elastic base plate 41 are all made of elastic good conductor material
Expect, selects the superior copper sheet of performance to be made in this example.In order to improve the performance parameter of conventional piezoelectric materials, and then improve energy
It collects and the efficiency of conversion, the first piezoelectric patches 31 and the second piezoelectric patches 41 uses piezo-electricity composite material.First piezoelectric patches 31 can be with
Upper surface, lower surface or the upper and lower surface for being pasted onto the first elastic base plate 31 are pasted, and the first elastic base plate is used in this example
A piezoelectric patches is pasted in 31 upper surface, forms monocrystalline piezoelectric a period of time.Second piezoelectric patches 41 can be pasted onto the second elastic base plate
41 outer surface, inner surface or surfaces externally and internally is pasted, and pastes two using in the outer surface of the second elastic base plate 41 in this example
The mode of piece piezoelectric patches.First electrode 33 and second electrode 43 use metallic tin, and copper good with electric conductivity, that resistivity is low
Line accesses in external circuit, to reduce unnecessary power loss, improves the collection efficiency of energy collecting device.Elastic element is adopted
With compression-type metal spring, stiffness factor 20N/cm, line footpath 1mm, outer diameter 8mm, length 30mm；Support rod 6 uses lightweight
Cylinder type steel thin bar, the length is 35mm, diameter 3mm；Ring-type element 7 uses diameter for the round iron hoop of 15mm,
Its line footpath is 2mm；First magnetic block 8 and the second magnetic block 9 are all made of magnet block, and the size of two magnet blocks is：Long 15mm,
Wide 15mm, high 15mm.
In this example, bracket 2 is firmly pasted onto fixing seat 1 with AB glue, ensures bracket 2 during installation and fixes
The contact surface of seat 1 uniformly smears glue.Second elastic base plate 41, elastic element 5 and support rod 6 are each attached on bracket 2,
And elastic element 5 and support rod 6 are respectively positioned on the indentation, there of the second elastic base plate 41, support rod 6 is fixed on the upper of elastic element 5
Side.Ensure straight line of the installation site of the second elastic base plate 41, elastic element 5 and support rod 6 on bracket 2 during installation
On, and with the second elastic base plate 41 to be formed by the inner edge of U-shaped structure parallel for the straight line.First elastic base plate 31 and elasticity member
Part 5 is fixed using adhesive means, i.e., mutually fixes the free end of elastic element 5 and the broadside of the first elastic base plate 31, and guarantee
First elastic base plate 31 is located within the notch of the second elastic base plate 41.Due to the first elastic base plate 31 and the second elastic base plate 41
Can be at different angles when installation, and the first elastic base plate 31 can be except the notch of the second elastic base plate 41.In order to true
Protecting the energy collecting device has optimal performance, uses the first elastic base plate 31 vertical with the second elastic base plate 41 in this example
Fixed mode, and the first elastic base plate 31 is in the symmetry axis of length direction and the axis of symmetry phase mutual respect of the second elastic base plate 41
It closes, even if the first elastic base plate 31 and the second elastic base plate face are vertically fixed.In order to avoid elastic element 5 is because connecting the first bullet
Property substrate 31 after generate deformation, the first elastic base plate 31 is suspended on to the free end of support rod 6 using a ring-type element 7, this
In order to avoid ring-type element 7 and support rod 6 are because of the multidirectional vibration of the friction effects piezoelectric type existing between contact surface in example
The performance of energy collecting device, by the way of the contact surface coating lubricating oil in ring-type element 7 and support rod 6, to eliminate
The influence of frictional force.In order to adjust the resonance frequency of inner beam 3 and outer beam 4, can vibration frequency in matched environment so that
Resonance occurs in it, so that maximum output voltage is generated, in the free end of the first elastic base plate 31 and the second elastic base plate 41
Middle position fastens with glue the first magnetic block 8 and the second magnetic block 9 respectively, and the first magnetic block 8 and the second magnetic block 9 according to
Positive area is maximum and magnetic pole is fixed for the mode of homopolarity, and in this example, the level of the first magnetic block 8 and the second magnetic block 9 is just
The distance that begins is 7mm.
The multidirectional energy gathering apparatus of the piezoelectric type, working principle are as follows：
Three-dimensional coordinate system is established, defining the direction parallel with inner beam 3 and 4 length direction of outer beam is the direction x, with elasticity
The vertical direction of 41 plate face of substrate is the direction y, and the direction vertical with 31 plate face of elastic base plate is the direction z.Elastic base plate 31 can be with
The vibrational energy in the direction z is perceived, and converts electric energy for vibrational energy using the first piezoelectric patches 32, passes through what is connect with first electrode 33
Lead output.Elastic base plate 41 can perceive the vibrational energy in the direction y, and convert electricity for vibrational energy using the second piezoelectric patches 42
Can, it is exported by the lead being connect with second electrode 43.Elastic element 5 can perceive the vibrational energy in the direction x, and slow as energy
It rushes device and vibrational energy is stored as potential energy, and be released to inner beam 3, triggering inner beam 3 vibrates, so that the vibrational energy in the direction x is converted to
Electric energy.Under the vibration in the direction x and the direction z, inner beam 3 generates the vibration for deviateing equilbrium position, to change the first magnetic block 8
And the second spacing between magnetic block 9, the magnetic coupling of two magnetic blocks is caused, to couple by inner beam 3 vibrational energy to outer
Beam 4 triggers outer beam 4 and vibrates, outer beam 4 is made to generate voltage output.Under the vibration in the direction y, outer beam 4, which generates, deviates equilbrium position
Vibration, to change the spacing between the first magnetic block 8 and the second magnetic block 9, causes the magnetic coupling of two magnetic blocks, thus
Inner beam 3 is couple by outer beam 4 by vibrational energy, triggering inner beam 3 vibrates, and inner beam 3 is made to generate output voltage.Due to the first magnetic block
8 and second magnetic block 9 magnetic coupling interaction, cause frequency upconversion, to extend the frequency bandwidth of inner beam 3 and outer beam 4,
Improve output voltage and output power.
Referring to Fig. 2, any one vector u according to the Orthogonal Decomposition principle in three-dimensional space, i.e., in three-dimensional space
Be decomposed in tri- reference axis of x, y and z, in this example, the deflection of vector u and x-axis, y-axis and z-axis be respectively α, β,
γ, therefore, the vibration in any one direction in three dimensions can be decomposed on the direction x, the direction y and the direction z.Due to
Piezoelectric type vibration energy collecting device proposed by the present invention can collect the vibrational energy on tri- directions x, y and z, so of the invention
The piezoelectric type vibration energy collecting device of proposition can collect the vibrational energy in any one direction in three-dimensional space.
Above description is only example of the present invention, it is clear that for those skilled in the art, is being understood
After the contents of the present invention and principle, all form and details may be carried out without departing substantially from the principle of the present invention, structure
On various modifications and variations, but these modifications and variations based on inventive concept are still protected in claim of the invention
Within the scope of.
Claims (6)
1. a kind of multidirectional energy gathering apparatus of piezoelectric type, which is characterized in that including fixing seat (1), be arranged in fixing seat (1)
On bracket (2), inner beam (3), outer beam (4), elastic element (5), support rod (6), ring-type element (7), the first magnetic block (8) and
Second magnetic block (9), wherein：
The inner beam (3) including the first elastic base plate (31), is pasted onto the plate face of the first elastic base plate (31) fixing end one end
First piezoelectric patches (32) and the first electrode (33) being pasted on the first piezoelectric patches (32)；First elastic base plate (31) uses
Lightweight conductive rectangular plate；First piezoelectric patches (32) is using the material with direct piezoelectric effect；The first electrode (33)
Using conductive metal material, for exporting the electric energy of the first piezoelectric patches (32) generation；
The outer beam (4) including the second elastic base plate (41), is pasted onto the plate face of the second elastic base plate (41) fixing end one end
Second piezoelectric patches (42) and the second electrode (43) being pasted on the second piezoelectric patches (42)；Second elastic base plate (41) uses
Lightweight conductive rectangular plate, fixing end are provided with rectangular notch, form U-shaped structure；Second piezoelectric patches (42) is using tool
There is the material of direct piezoelectric effect；The second electrode (43) uses conductive metal material, produces for exporting the second piezoelectric patches (42)
Raw electric energy；
Second elastic base plate (41) is fixed on bracket (2), deviates balance for generating under the conditions of extraneous ambient vibration
The vibration in the direction y of position, and electric energy is translated by the second piezoelectric patches (42)；The elastic element (5) is fixed on branch
It is located at the indentation, there of the second elastic base plate (41), the vibrational energy for sensing external environment in the direction x on frame (2), and is passed
Pass inner beam (3)；The support rod (6) is fixed on bracket (2), and is located at the top of elastic element (5)；First elasticity
Substrate (31) is located in the notch of the second elastic base plate (41), and vertical with the second elastic base plate (41), first elastic base plate
(31) fixing end and the free end of elastic element (5) are fixed, and the freedom of support rod (6) is suspended on by ring-type element (7)
End for generating the vibration for deviateing the direction z of equilbrium position under the conditions of extraneous ambient vibration, and passes through the first piezoelectric patches (32)
It is translated into electric energy；First magnetic block (8) is fixed on the free end of the first elastic base plate (31), for adjusting inner beam
(3) resonance frequency；Second magnetic block (9) is fixed on the free end of the second elastic base plate (41), for adjusting outer beam (4)
Resonance frequency, and realize and the first magnetic block (8) between magnetic coupling.
2. the multidirectional energy gathering apparatus of a kind of piezoelectric type according to claim 1, which is characterized in that first pressure
Electric piece (32), is pasted onto the one or both sides of the first elastic base plate (31) plate face.
3. the multidirectional energy gathering apparatus of a kind of piezoelectric type according to claim 1, which is characterized in that second pressure
Electric piece (42), is pasted onto the one or both sides of the second elastic base plate (41) plate face.
4. the multidirectional energy gathering apparatus of a kind of piezoelectric type according to claim 1, which is characterized in that second bullet
Property substrate (41), U-shaped structure be symmetrical U-shaped structure.
5. the multidirectional energy gathering apparatus of a kind of piezoelectric type according to claim 1, which is characterized in that first magnetic
Property block (8), is fixed on the middle position of the first elastic base plate (31) free end.
6. the multidirectional energy gathering apparatus of a kind of piezoelectric type according to claim 1, which is characterized in that second magnetic
Property block (9), is fixed on the middle position of the second elastic base plate (41) free end.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107302323A (en) * | 2017-07-10 | 2017-10-27 | 天津大学 | Three-dimensional piezoelectric cantilever beam vibrational energy acquisition system |
| CN107167277B (en) * | 2017-07-26 | 2023-04-25 | 中国工程物理研究院总体工程研究所 | Universal triggering impact fuze sensor with single piezoelectric sheet piezoelectric transduction |
| CN108832842B (en) * | 2018-06-12 | 2020-04-24 | 南京航空航天大学 | Frequency-raising type piezoelectric generator for collecting horizontal direction ultralow frequency vibration energy |
| CN108847785A (en) * | 2018-06-29 | 2018-11-20 | 安徽工程大学 | Two-freedom low-frequency vibration energy acquisition device based on corrugated beams |
| CN109058367B (en) * | 2018-07-30 | 2020-12-04 | 中国舰船研究设计中心 | Shafting supporting structure with vibration reduction function |
| CN110572076B (en) * | 2019-09-02 | 2021-06-08 | 西安电子科技大学 | Multi-direction piezoelectric vibration energy collecting device |
| CN111779784B (en) * | 2020-06-05 | 2022-02-01 | 长江大学 | Cantilever type piezoresistance damper |
| CN112855414B (en) * | 2021-03-12 | 2023-02-28 | 武汉理工大学 | Power generation system based on piezoelectric-electromagnetic effect |
| CN114400926A (en) * | 2021-12-28 | 2022-04-26 | 中国航天空气动力技术研究院 | Flutter energy collecting device of two-degree-of-freedom wing segment and wind power generation equipment |
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| CN101404468B (en) * | 2008-11-25 | 2011-06-08 | 重庆大学 | Vibration energy collector with piezomagnetic/piezoelectric composite energy conversion structure |
| CN102064745B (en) * | 2010-11-15 | 2013-07-31 | 中国人民解放军国防科学技术大学 | Bistable piezoelectric cantilever beam vibrator device |
| CN202076957U (en) * | 2011-04-22 | 2011-12-14 | 中南大学 | Ambient vibration energy collecting device based on two-degree-of-freedom piezoelectric vibrator |
| CN203219211U (en) * | 2013-01-11 | 2013-09-25 | 浙江工商大学 | Efficient wideband vibrating energy collector with elastic amplifying mechanism |
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