CN110389014A - A kind of piezoelectric energy collects array Flow vibration experimental provision and its operating method - Google Patents
A kind of piezoelectric energy collects array Flow vibration experimental provision and its operating method Download PDFInfo
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- CN110389014A CN110389014A CN201910640831.8A CN201910640831A CN110389014A CN 110389014 A CN110389014 A CN 110389014A CN 201910640831 A CN201910640831 A CN 201910640831A CN 110389014 A CN110389014 A CN 110389014A
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- round tube
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
Abstract
A kind of piezoelectric energy collects array Flow vibration experimental provision and its operating method, it is related to a kind of piezoelectric energy experimental provision and its operating method, entire experimental system is separated into preceding water storage tank, test water tank, rear water storage tank three parts using water proof grid, centrifugal pump provides power for entire experiment test device and constitutes water circulation system.In test water tank section, flexible round tube collection of energy array is fixed on the sliding rail of bottom end, use photosensitive displacement measurement system, tachymeter, oscillograph etc. was monitored and records to the case where fluid and [1] collection of energy structure, the flow velocity of experimental provision is adjusted using regulating valve, utilizes the distance between adjustable round tube array of sliding rail.The advantages of experimental provision of the present invention, is that occupied area is small, and flow velocity is steady, and numerical value is adjustable, can be by changing different parameters, and the vibration shape of monitoring fluid, collection of energy array records the important parameters such as vibration displacement and voltage.
Description
Technical field
The present invention relates to a kind of piezoelectric energy experimental provision and its operating methods, collect more particularly to a kind of piezoelectric energy
Array Flow vibration experimental provision and its operating method.
Background technique
Underwater wireless sensor network all plays an important role national economy and national defence, but due to underwater sensing
Device network is arranged in the bottom in river, sea, lake more, and cost when node not enough power supply needs replacing battery or safeguards is larger,
Therefore a kind of stabilization is provided for underwater wireless sensor network node, reliable, light and long-acting energy resource supply becomes urgently
It solves the problems, such as.
Currently, the experiment test device of available small-sized underwater Flow vibration piezoelectric energy collector is not shaped,
The test and analysis of laboratory stage are provided for the development of underwater Flow vibration piezoelectric energy collector.
Therefore, for this technical problem, need to design a kind of underwater Flow vibration piezoelectricity energy of small-sized flow speed stability
Measure the experiment test device of collector.
Summary of the invention
The purpose of the present invention is to provide a kind of piezoelectric energies to collect array Flow vibration experimental provision and its operating method,
The present invention proposes that a kind of piezoelectric energy of the flexible round tube of built-in bimorph piezo electric cantilever beam collects the Flow vibration experiment survey of array
Devices and methods therefor is tried, is specifically exactly that array is collected to flexible round tube piezoelectric energy and is being flowed by water circulation experiment system
The important parameters such as the lower displacement generated of vibration and voltage are caused to carry out experiment test and data analysis.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of piezoelectric energy collection array Flow vibration experimental provision, described device include preceding water storage tank, pipeline, water proof grid, survey
Fast instrument, photosensitive receiver board, display screen, photosensitive image processing instrument, flowmeter, regulating valve, centrifugal pump, rear water storage tank, test water tank,
Oscillograph, flexible round tube piezoelectric energy are collected array, lens, laser generator, Guang Qu, flexible round tube collection of energy array and are fixed
Pedestal, sliding rail, apopore；Centrifugal pump is installed, pipeline connects the water outlet and water inlet of entire sink, in centrifugal pump outside sink
Water outlet and water inlet regulating valve is respectively set；Sink both ends are respectively equipped with water proof grid, and entire sink is divided by water proof grid
Preceding water storage tank, test water tank, rear water storage tank three parts, water proof grid middle section is provided with apopore；Pipeline above water storage tank afterwards
Upper installation flowmeter；Photosensitive receiver board is installed above test water tank, tachymeter, photosensitive shadow are installed at pipeline above test water tank
As processing instrument, LED display is installed outside water tank, photosensitive receiver board, photosensitive image processing instrument and LED display are connected
Line connection；It tests water tank bottom and three sliding rails is installed；Flexible round tube piezoelectric energy is collected array and is fixed in slide rail base, flexible
It is bimorph piezo electric cantilever beam inside round tube, bimorph piezo electric cantilever beam selects copper as cantilever beam substrate, adheres in copper sheet two sides and press
Electroceramics layer, the fixed upper end in whole device bottom end is free, and flexible piezoelectric collection of energy array connecting line is connect with oscillograph；
It tests water tank lower end and laser generator is set, through lens by beam diffraction be planar light source signal after Laser emission, with always
Photosensitive receiver board is installed, the distance of flexible round tube upper surface to laser generator is equal to flexible round tube upper surface and connects to photosensitive on line
The distance for receiving plate, according to triangle correspondence theorem, amplification factor is 2 times；Photosensitive image processing instrument, interface and photosensitive reception are set
Plate and LED display are separately connected.
A kind of piezoelectric energy collects array Flow vibration experimental provision, and the sink main body is by organic glass system
At a length of 120cm, width 60cm, a height of 35cm.
A kind of piezoelectric energy collects array Flow vibration experimental provision, and the pipeline is D3The PVC of 2.9mm
Water pipe.
A kind of piezoelectric energy collects array Flow vibration experimental provision, and the sliding rail is placed in parallel, every two cunnings
Spacing between rail is adjustable, and several firm bankings are arranged on every sliding rail.
A kind of piezoelectric energy collection array Flow vibration experimental provision operating method, was tested the method includes following
Journey:
In laser irradiation can not be received by the part that flexible round tube blocks on photosensitive receiver board, with the vibration of flexible round tube,
The laser irradiation situation of photosensitive receiver board constantly changes, and the photosensitive image processing instrument connecting with photosensitive receiver board will record photosensitive connect
It receives the illumination bounds of plate and changes over time situation, photosensitive image processing instrument reads illumination edge on photosensitive receiver board and sits
Mark, records the oscillation trajectory of flexible round tube, and calculates the maximum vibration amplitude of flexible round tube；Piezoelectric energy collects array bottom end
Fixed, upper end is free, and piezoelectric cantilever plane is parallel to direction of flow, and array is fixed on the sliding rail in test water tank, In
Preceding water storage tank fills water, and water flows to whole device by the apopore of water proof grid, opens centrifugal pump, is controlled and is tested by regulating valve
Flow velocity in device, guarantee the water flow of Experimental Water Tank with certain flow rate smooth flow, bimorph piezo electric cantilever beam built in water impact
Flexible round tube, forming the whirlpool that the period falls off at rear causes flexible round tube Cyclic flexion to vibrate, to drive piezoelectric cantilever
Beam vibration observes the vibrational state of flexible round tube using its photosensitive measuring system to producing electricl energy, analyze generation displacement and
Voltage condition.
The advantages and effects of the present invention are:
Experimental provision occupied area of the present invention is smaller, and by different in flow rate in control valve adjusting test water tank, guarantee experiment exists
It is carried out under steady flow velocity.Adjust the position of flexible round tube piezoelectric energy collecting device on sliding rail, come compare different arrangement modes and
The experimental conditions of spacing are intuitively observed and are recorded flexible round tube piezoelectric energy by photosensitive Displacement Analysis system and oscillograph and collect
The motion state of array and the voltage condition of generation meet more experiment conditions and compare experiment, to flexible round tube piezoelectric energy
The displacement and voltage that device generates carry out data analysis.
Detailed description of the invention
Fig. 1 is the overall schematic of apparatus of the present invention；
Fig. 2 is the flexible round tube piezoelectric energy collecting device schematic diagram of bimorph piezo electric cantilever beam built in the present invention；
Fig. 3 is that the flexible round tube piezoelectric energy of the present invention collects array schematic diagram；
Fig. 4 is the photosensitive Displacement Analysis system schematic of the present invention；
Fig. 5 is the whole axis side schematic diagram of apparatus of the present invention.
Specific embodiment
The present invention is described in detail for illustrated embodiment with reference to the accompanying drawing.
A kind of flexible round tube piezoelectric energy of the present invention collects the Flow vibration experiment test device and application method of array, is
The Flow vibration experiment test and analysis for completing built-in bimorph piezo electric cantilever beam flexibility round tube piezoelectric energy collector, according to stream
Vibration principle is caused, by adjusting the flow and flow rate of water circulation in the control experiment of pipeline regulating valve, designs photosensitive displacement measurement system
System collects the vibration of array to flexible round tube piezoelectric energy by test devices such as flowmeter, current meter, oscillograph, computers
State, the parameters such as the displacement of generation and voltage are recorded, in order to which the stream to flexible round tube piezoelectric energy collecting device causes vibration
Dynamic and piezoelectric property is analyzed.
The entire experimental trough of the present invention is isolated with water proof grid 3, is divided into preceding water storage tank 1, test water tank 12, rear water storage tank 11 3
A major part, water proof grid lower part, which is set up separately, sets apopore 20, guarantees that water energy is enough unobstructed and flows in entire experimental trough.
Further, whole device is connected with pipeline 2 using centrifugal pump 10, experimental provision is made to constitute water circulation system.Afterwards
Water storage tank 11 is connect with the water inlet of centrifugal pump 10, and the water outlet of centrifugal pump 10 is connect with preceding water storage tank 1.When experiment starts, open
Centrifugal pump 10 is opened, centrifugal pump 10 provides power for package unit, guarantees the flow speed stability of test 12 part of water tank.
Further, regulating valve 9 is respectively set in the water inlet of centrifugal pump and water outlet, changes flow and stream by regulating valve
Speed carries out the experiment of control variable, collects array to the piezoelectric energy under different in flow rate and experiment condition and produce by adjusting flow velocity
Raw vibration and voltage condition carry out sample data analysis.
Further, flowmeter 8 is installed on pipeline 2, monitors the flow of entire experimental provision, guarantees that the water energy in device is enough
The speed smooth flow needed with experimentation.
Further, sliding rail 19 is installed in test 12 bottom of water tank, firm banking 18 is arranged in slideway in slideway parallel laid,
Its 18 position of firm banking is adjustable, and it is adjustable to guarantee that flexible round tube piezoelectric energy collects 14 spacing of array.
Further, flexible round tube piezoelectric energy collects array 14 using the thin wall flexible round tube of built-in bimorph piezo electric cantilever beam
14-1, piezoelectric cantilever use substrate of the copper sheet as beam, and piezoelectric layer uses PZT piezoelectric ceramics, piezoelectric cantilever plane is put down
Row is axial in round tube and direction of flow is placed in inside thin wall flexible round tube, and water flow, which flows through the vortex shedding formed when round tube, to be caused
Flexible round tube Cyclic flexion vibration, to drive vibration in piezoelectric cantilever beam and produce electricl energy.
Further, it is by beam diffraction through lens 15 after test water tank lower end setting laser generator 16, Laser emission
Planar light source signal, installs photosensitive receiver board 5 on the same line, and the distance of flexible round tube upper surface to laser generator is equal to
Photosensitive image processing instrument 7, interface and photosensitive receiver board 5 and LED is arranged to the distance of photosensitive receiver board in flexible round tube upper surface
Display screen 6 is separately connected.Laser irradiation can not be received by the part that flexible round tube blocks on photosensitive receiver board in experimentation,
With the vibration of flexible round tube, the laser irradiation situation of photosensitive receiver board constantly changes, the photosensitive shadow connecting with photosensitive receiver board
As the illumination bounds that processing instrument will record photosensitive receiver board read photosensitive with situation, photosensitive influence processing instrument is changed over time
Illumination edge coordinate on receiver board plate, records the oscillation trajectory of flexible round tube, and calculates the maximum vibration amplitude of flexible round tube.
Further, tachymeter is installed on the pipeline above test water tank, to the water velocity and water flow in test water tank
State etc. is monitored in real time and is analyzed.
Another aspect, a kind of user of the Flow vibration experiment test device of flexibility round tube piezoelectric energy collection array
Method fills water in preceding water storage tank 1, and water flows to whole device by the apopore 20 of water proof grid 3, opens centrifugal pump 10, adjusts and adjusts
It saves valve 9 and controls flow velocity in experimental provision, guarantee the water flow of Experimental Water Tank with certain experimental flow rate smooth flow, flexible round tube piezoelectricity
14 bottom end of collection of energy array is fixed, and upper end is free, and piezoelectric cantilever plane is parallel to direction of flow, and array is fixed on test
On sliding rail in water tank, the flexible round tube of bimorph piezo electric cantilever beam built in water impact, the whirlpool that the formation period falls off at rear
Flexible round tube Cyclic flexion vibration is driven, to drive vibration in piezoelectric cantilever beam and then produce electricl energy, utilizes photosensitive displacement point
Analysis system and oscillograph observe the vibrational state of flexible round tube, analyze the displacement and voltage condition of generation.
Specific embodiment
As shown in Figures 1 to 4, the present invention include centrifugal pump provide power, regulating valve coutroi velocity, current meter and flowmeter monitoring,
The flexible round tube piezoelectric energy of pipeline connection collects the Flow vibration experiment test system of array；Built-in bimorph piezo electric cantilever beam
The voltage monitoring system that the piezoelectric energy collection structure and oscillograph of flexible round tube are constituted；Flexible round tube piezoelectric energy collects battle array
Column；Displacement Analysis system including laser generator, photosensitive Displacement Analysis system etc..
Specifically, a kind of flexibility round tube piezoelectric energy collects the whole signal of the Flow vibration experiment test device of array
Entire sink is divided into preceding water storage tank 1, test water tank 12,11 three parts of rear water storage tank using water proof grid 3 by figure.In entire sink
Outside installation centrifugal pump 10, the water outlet and water inlet of entire sink are connected using pipeline 2, are distinguished in water inlet and water outlet
Regulating valve is set, flowmeter 8 is installed on pipeline above rear water storage tank.In test water tank lower end, laser generator 16, laser are set
After transmitting through lens 15 by beam diffraction be planar light source signal, test water tank above photosensitive receiver board 5, photosensitive image are installed
Processing instrument 7 installs LED display 6 outside water tank, and photosensitive receiver board, photosensitive image processing instrument and LED display are connected
Line connection.Testing tachymeter 4 is installed above water tank at pipeline, flexible round tube piezoelectric energy collection array 14 is fixed on sliding rail
On 19 firm banking 18, flexible piezoelectric collection of energy array connecting line is connect with oscillograph 13.
Specifically, the flexible round tube piezoelectric energy collecting device of bimorph piezo electric cantilever beam built in the attached drawing 2, cantilever beam are adopted
Use copper sheet 14-2 as the substrate of beam, the two sides of copper sheet are PZT piezoelectric layer 14-3 parallel-connection structure, and one end of piezoelectric cantilever is fixed
In the bottom of flexible round tube, entire cantilever beam is embedded in flexible round tube.Flexible round tube piezoelectric energy collecting device and oscillograph 15
It, being capable of real-time monitoring piezoelectric energy collecting device the case where generating voltage with connecting line 14-4 connection.
Specifically, flexible round tube piezoelectric energy collection array 14 is fixed on firm banking 18 in the attached drawing 3, rectangular battle array
Column arrangement, the center of every two flexibility round tube is away from being medium center away from (4D).
Specifically, the attached drawing 4 emits laser in test water tank lower end laser generator 16, laser is through lens 15 by wave beam
Be refracted as planar light source signal, photosensitive receiver board 5 be installed on the same line, flexible round tube upper surface to laser generator away from
From being equal to a distance from flexible round tube upper surface to photosensitive receiver board, according to triangle correspondence theorem, amplification factor is 2 times.Light is set
Quick image processing instrument 7, interface are separately connected with photosensitive receiver board 5 and LED display 6.In experimentation on photosensitive receiver board
Laser irradiation can not be received by the part that flexible round tube blocks, with the vibration of flexible round tube, the laser of photosensitive receiver board shines
It penetrates situation constantly to change, the photosensitive image processing instrument connecting with photosensitive receiver board will record the illumination bounds of photosensitive receiver board
With change over time situation, photosensitive influence processing instrument reads illumination edge coordinate on photosensitive receiver board plate, and record presses flexible round tube
Oscillation trajectory, and calculate the maximum vibration amplitude of flexible round tube.
When test, first by each flexible round tube collection of energy structure, array places the sliding rail for being fixed on test water tank bottom
On, spacing to each other can refer to the best vortex street state based on peripheral flow vortex and be arranged.Then in experiment water
Water is injected in slot, opens centrifugal pump, controls to adjust valve, the flow velocity in Experimental Water Tank is made according to general ocean flow velocity (≤1.5m/s)
To test required flow velocity；Current meter, flowmeter, photosensitive image processing instrument, oscillograph are opened simultaneously, it is flat to water flow in Experimental Water Tank
Surely, water speed is observed and records to the vibration frequency of piezoelectric energy collecting device, displacement and voltage etc. after stablizing.
Further, adjust water velocity, record and observe it is different in flow rate under experimental data.
Further, flexible round tube piezoelectric energy collecting device is adjusted apart from the distance between preceding water storage tank and rear water storage tank,
The arrangement mode of the distance between every two energy collecting device and entire array is adjusted, experimental data is enriched.
It is enlightenment above according to an example of the invention, limitation in any form, related work not is done to the present invention
Make personnel can be without departing from inventive technique thought of expecting in the range of, it is carried out multiplicity modification.It is all according to the present invention
Technical spirit carries out any type of modification, simple change to above embodiment, same to change, and each falls within protection of the invention
Within the scope of.
Claims (5)
1. a kind of piezoelectric energy collects array Flow vibration experimental provision, which is characterized in that described device includes preceding water storage tank
(1), pipeline (2), water proof grid (3), tachymeter (4), photosensitive receiver board (5), display screen (6), photosensitive image processing instrument (7), stream
Meter (8), regulating valve (9), centrifugal pump (10), rear water storage tank (11), test water tank (12), oscillograph (13), flexible round tube pressure
Electric flux collection array (14), lens (15), laser generator (16), light area (17), flexible round tube collection of energy array are fixed
Pedestal (18), sliding rail (19), apopore (20)；Centrifugal pump (10) are installed outside sink, pipeline (2) connects the water outlet of entire sink
Mouth and water inlet, are respectively set regulating valve (9) in the water outlet and water inlet of centrifugal pump；Sink both ends are respectively equipped with water proof grid
(3), entire sink is divided into preceding water storage tank (1), test water tank (12), rear water storage tank (11) three parts, water proof grid by water proof grid (3)
(3) middle section is provided with apopore (20)；Flowmeter (8) are installed on pipeline above water storage tank (11) afterwards；In test water tank
(12) photosensitive receiver board (5) is installed in top, installs tachymeter (4), photosensitive image processing instrument above test water tank (12) at pipeline
(7), LED display (6) are installed outside water tank, by photosensitive receiver board (5), photosensitive image processing instrument (7) and LED display
(6) it is connected with connecting line；It tests water tank bottom and three sliding rails (19) is installed；It is fixed that flexible round tube piezoelectric energy collects array (14)
It is bimorph piezo electric cantilever beam inside flexible round tube in slide rail base, bimorph piezo electric cantilever beam selects copper as cantilever beam substrate,
Adhere to piezoceramics layer in copper sheet two sides, the fixed upper end in whole device bottom end is free, and flexible piezoelectric collection of energy array is connected
Wiring connect (13) with oscillograph；Water tank lower end setting laser generator (16) is tested, through lens (15) by wave after Laser emission
Beam is refracted as planar light source signal, installs on the same line photosensitive receiver board (5), flexible round tube upper surface to laser generator
Distance be equal to the distance that photosensitive receiver board is arrived in flexible round tube upper surface, according to triangle correspondence theorem, amplification factor is 2 times；If
Photosensitive image processing instrument (7) is set, interface is separately connected with photosensitive receiver board (5) and LED display (6).
2. a kind of piezoelectric energy according to claim 1 collects array Flow vibration experimental provision, which is characterized in that described
Sink main body is made of organic glass, a length of 120cm, width 60cm, a height of 35cm.
3. a kind of piezoelectric energy according to claim 1 collects array Flow vibration experimental provision, which is characterized in that described
Pipeline is D3The PVC water pipe of 2.9mm.
4. a kind of piezoelectric energy according to claim 1 collects array Flow vibration experimental provision, which is characterized in that described
Sliding rail is placed in parallel, and the spacing between every two sliding rails is adjustable, and several firm bankings (18) are arranged on every sliding rail.
5. a kind of piezoelectric energy collects array Flow vibration experimental provision operating method, which is characterized in that the method includes with
Lower experimentation:
In laser irradiation can not be received by the part that flexible round tube blocks on photosensitive receiver board, with the vibration of flexible round tube,
The laser irradiation situation of photosensitive receiver board constantly changes, and the photosensitive image processing instrument connecting with photosensitive receiver board will record photosensitive connect
It receives the illumination bounds of plate and changes over time situation, photosensitive image processing instrument reads illumination edge on photosensitive receiver board and sits
Mark, records the oscillation trajectory of flexible round tube, and calculates the maximum vibration amplitude of flexible round tube；Piezoelectric energy collects array bottom end
Fixed, upper end is free, and piezoelectric cantilever plane is parallel to direction of flow, and array is fixed on the sliding rail in test water tank, In
Preceding water storage tank fills water, and water flows to whole device by the apopore of water proof grid, opens centrifugal pump, is controlled and is tested by regulating valve
Flow velocity in device, guarantee the water flow of Experimental Water Tank with certain flow rate smooth flow, bimorph piezo electric cantilever beam built in water impact
Flexible round tube, forming the whirlpool that the period falls off at rear causes flexible round tube Cyclic flexion to vibrate, to drive piezoelectric cantilever
Beam vibration observes the vibrational state of flexible round tube using its photosensitive measuring system to producing electricl energy, analyze generation displacement and
Voltage condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910640831.8A CN110389014A (en) | 2019-07-16 | 2019-07-16 | A kind of piezoelectric energy collects array Flow vibration experimental provision and its operating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910640831.8A CN110389014A (en) | 2019-07-16 | 2019-07-16 | A kind of piezoelectric energy collects array Flow vibration experimental provision and its operating method |
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| Publication Number | Publication Date |
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| CN110389014A true CN110389014A (en) | 2019-10-29 |
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| CN201910640831.8A Withdrawn CN110389014A (en) | 2019-07-16 | 2019-07-16 | A kind of piezoelectric energy collects array Flow vibration experimental provision and its operating method |
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| CN104868785A (en) * | 2015-04-30 | 2015-08-26 | 沈阳化工大学 | Cylindrical vortex-induced vibration generation device with built-in piezoelectric beam |
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| CN108919113A (en) * | 2018-04-03 | 2018-11-30 | 哈尔滨工业大学 | A kind of piezoelectric energy harvesters test device and test method |
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2019
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| US9887346B2 (en) * | 2012-10-05 | 2018-02-06 | Nokia Technologies Oy | Apparatus and associated methods |
| CN104993737A (en) * | 2015-04-28 | 2015-10-21 | 北京航空航天大学 | Bidirectional energy collection apparatus based on flow-induced vibration |
| CN104868785A (en) * | 2015-04-30 | 2015-08-26 | 沈阳化工大学 | Cylindrical vortex-induced vibration generation device with built-in piezoelectric beam |
| CN105811803A (en) * | 2016-03-16 | 2016-07-27 | 江苏大学 | Piezoelectric material based fluid vibration energy collection apparatus |
| CN108919113A (en) * | 2018-04-03 | 2018-11-30 | 哈尔滨工业大学 | A kind of piezoelectric energy harvesters test device and test method |
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Application publication date: 20191029 |