CN207377699U - A kind of wave energy and the drifting buoy self-power supply device of solar energy complementation - Google Patents

A kind of wave energy and the drifting buoy self-power supply device of solar energy complementation Download PDF

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Publication number
CN207377699U
CN207377699U CN201720942699.2U CN201720942699U CN207377699U CN 207377699 U CN207377699 U CN 207377699U CN 201720942699 U CN201720942699 U CN 201720942699U CN 207377699 U CN207377699 U CN 207377699U
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China
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main body
energy
solar panel
wave
drifting buoy
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Expired - Fee Related
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CN201720942699.2U
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Chinese (zh)
Inventor
刘云平
王月鹏
刘青山
刘佳
王皖东
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Nanjing University of Information Science and Technology
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Nanjing University of Information Science and Technology
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

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  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The utility model discloses a kind of wave energies and the drifting buoy self-power supply device of solar energy complementation, drifting buoy main body in device includes solar panel power generation part, wave-energy power generation part and controller part, being attached with conducting wire between each part.Solar panel power generation part is located at the top of drifting buoy main body, and sea is exposed in this part, convenient for converting the solar into electric energy;Wave-energy power generation part is mainly made of wave energy capture mechanism and cylinder type permanent magnet linear generator, and positioned at the middle part of drifting buoy, this part is intersected with sea, and wave energy is captured convenient for wave energy capture mechanism;Controller part is located at the bottom of drifting buoy, this part mainly includes CPU, AC/DC modular converter, power management module and accumulator, it is mainly used for after treatment storing the voltage of the voltage of solar panel output and the output of cylinder type permanent magnet linear generator into battery, for uses such as drifting buoy data collecting system and communication systems.

Description

A kind of wave energy and the drifting buoy self-power supply device of solar energy complementation
Technical field
The utility model is related to a kind of wave energies and the drifting buoy self-power supply device of solar energy complementation, belong to renewable energy Source field of comprehensive utilization.
Background technology
Drifting buoy is current widely used marine hydrometeorology monitoring platform, it is in sea or certain depth The buoy to float with ocean current obtains its location information with satellite or acoustic method, is obtained with Lagrangian method by buoy flow trace To ocean current.Drifting buoy belongs to deserted, and at sea continuous monitoring can not withdraw and replace battery, therefore drifting buoy Long-term continued power is one of problem.With the development of science and technology, existing available marine natural resources generation technology is main Have wind energy, solar energy and wave energy etc., design one kind can self-powered drifting buoy device become popular research direction.
A kind of maritime meteorology announced such as 205643749 U of patent No. CN monitors drifting buoy, the powering mode used It is solar panel power supply.The voltage exported by solar panel is connected to solar energy conversion circuit, passes through a series of turns It gets the operating voltage needed for system in return, realizes the self-powered of drifting buoy.But the working environment of this drifting buoy is subject to The limitation of weather, can only use under the weather environment of solar energy abundance, and effect is just lost in wind and rain weather.And due to too The voltage of positive energy solar panel output is smaller, therefore needs polylith battery plate serioparallel that can just obtain the operating voltage needed for system, relates to And to polylith solar panel, therefore its mounting structure is key technology, and the maritime meteorology monitoring drifting buoy without reference to Explanation.
The ocean Intelligent generating set announced such as 206054168 U of patent No. CN.The device includes lightweight raft and heavy Raft.When running into wave, wave promotes lightweight raft to move up and down, and then rotation axis and helical gear is driven to rotate, so as to So that bevel pinion also rotates, finally so that coupled the first alternator operation power generation.Simultaneously when lightweight raft With heavy raft when sea surface level moves, it is also possible that water wheels rotate so that the second coupled alternator operation Power generation, in addition solar power generation cell can also obtain solar energy and generate electricity, and the electric energy that their final work generate can lead to It is stored in after over commutation device adjustment current direction in accumulator.The device fully utilizes wave energy and solar energy, the different day of energy Gas utilizes different renewable energy power generations.The advantages of power generator, is that its heavy raft area greatly can be directly by the polylith sun Energy solar panel is mounted on heavy raft surface.But the shortcomings that power generator be using two generators add power generator from Weight so that when running into wave, up and down motion amplitude is restricted for lightweight raft and heavy raft, affects the power generation effect of generator Rate;In addition solar panel and heavy raft are installed together by the device, can cause heavy raft move up and down when solar-electricity Pond plate is subject to seawater, can influence the service life of solar panel in the past for a long time.Space and drift in view of drifting buoy Properties of flow, ocean Intelligent generating set are not suitable for being applied on drifting buoy.
The content of the invention
The utility model provides to solve the limitation of technical barrier that drifting buoy is powered for a long time and the prior art A kind of drifting buoy self-power supply device of wave energy and solar energy complementation.The device not only effectively solves generator dead weight The defects of influencing wave energy capture, and solve solar power generation part and what wave energy generator part interfered with each other asks Topic, realizes the purpose that drifting buoy is powered for a long time under different weather.
The utility model solves its technical problem and is achieved through the following technical solutions:
A kind of wave energy and the drifting buoy self-power supply device of solar energy complementation, including drifting buoy main body and main body outside Shell is divided into upper and lower part inside the main body cover by partition plate, and the upper end outside the main body cover be covered with it is transparent outer Shell;
The drifting buoy main body includes solar panel power generation part, wave-energy power generation part and controller portion Point, the solar panel power generation part includes solar panel, and the solar panel is arranged in transparent outer cover;
The wave-energy power generation part includes wave energy capture mechanism and cylinder type permanent magnet linear generator, the cylinder type Permanent magnet linear generator is arranged at the top in main body cover, and the cylinder type permanent magnet linear generator includes kinematic axis, described It is set on kinematic axis there are two types of opposite polarity permanent magnet, described two opposite polarity permanent magnets are distributed in kinematic axis On, mover yoke is installed on the kinematic axis between opposite polarity permanent magnet, and the periphery of the kinematic axis be equipped with around Group;The lower end of kinematic axis is also associated with tension spring, and described tension spring one end connects kinematic axis, and the other end of the tension spring is connected outside main body Partition plate inside shell;The wave energy capture mechanism includes float and stationary housing, and the stationary housing is connected with main body cover, And stationary housing is in the outside on main body cover top;Disk is rotatablely equipped in the stationary housing, is opened up on the disk There is axis hole, the disk is connected with shaft by axis hole interference fit, and the shaft is horizontally disposed with, and shaft stretches into main body cover In, the one end of the shaft away from disk is rotatablely equipped with disc cam, and the disc cam is located at cylinder type permanent magnet linear The downside of generator kinematic axis;The float lower end is equipped with moving lever, and the moving lever is vertically arranged, and the moving lever is stretched Enter in stationary housing;Connecting rod is connected with by pin one and pin two on the disk, the pin one is located at the edge and connecting rod of disk One end port, the pin two is located at the center of disk and the center of connecting rod, and port of the connecting rod away from pin one passes through pin three Connect port of the moving lever away from float;
The controller part is arranged at the lower part of main body cover, and the controller part includes CPU, for by wave energy Power generation part alternating current is converted to the AC/DC modular converters, power management module and the accumulator for storing electric energy of direct current, The power management module is used to manage the electric energy of wave-energy power generation part and solar panel output, and passes through voltage regulation filtering Accumulator is input to after processing;
The input terminal of the output terminal connection AC/DC modular converters of the cylinder type permanent magnet linear generator, the AC/DC The input terminal of the output terminal connection power management module of modular converter, and the solar panel also connects power management module Input terminal, the power management module output terminal connection accumulator.
Further, the solar panel has five pieces, and one of solar panel is horizontal positioned, remaining four pieces Solar panel is placed respectively in horizontal positioned four Peripheral rakes of solar panel, and described tilted-putted four pieces too It is positive can solar panel towards horizontal positioned solar panel.
Further, the angle of inclination of tilted-putted four pieces of solar panels is 45 °.
Further, the stationary housing is fixed on by fixed link on main body cover, described fixed link one end and main body Shell is fixedly connected, and the fixed link other end is fixedly connected with stationary housing.
The beneficial effects of the utility model are:
The utility model can be in sunny and wind and rain weather operation, can be in different weather using the device drifting buoy Realize self-powered.The utility model employs the structure that wave energy capture mechanism is separated with drifting buoy housing, solves cylinder The effect of weight capture mechanism of type permanent magnet linear generator and buoy captures the problem of wave energy.The utility model combines drift The characteristic of buoy is flowed, it is exactly a kind of new drifting buoy to monitor system and communication system in carrying.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model;
Fig. 2 is the structure diagram of the utility model wave energy capture mechanism;
Fig. 3 is the installation schematic top plan view of the utility model solar panel;
Flow direction schematic diagram when Fig. 4 is the kinematic axis firm setting in motion of cylinder type permanent magnet linear generator;
Fig. 5 is the flow direction schematic diagram after one tooth pitch of axis of motion of cylinder type permanent magnet linear generator;
Fig. 6 is the utility model connection schematic diagram.
Reference sign
1- controllers part, 2- tension springs, 3- movers yoke, 4- permanent magnet poles, 5- solar panels, 6- are transparent outer Shell, 7- floats, 8- moving levers, 9- stationary housings, 10- fixed links, 11- disks, 12- shafts, 13- windings, 14- disc cams, 15- axis holes, 16- connecting rods, 17- pins one, 18- deviate from permanent magnet, 21- pins two, the 22- of axis towards the permanent magnet of axis, 20- Pin three, 23- main body covers, 24- partition plates, 25- kinematic axis.
Specific embodiment
Below by specific embodiment, the utility model is described in further detail, following embodiment be it is descriptive, no It is limited, it is impossible to which the scope of protection of the utility model is limited with this.
As shown in Figure 1, a kind of wave energy and the drifting buoy self-power supply device of solar energy complementation, including drifting buoy main body With main body cover 23.Divided inside main body cover 23 by partition plate 24 for upper and lower part, and the upper end shield outside main body cover 23 There is transparent outer cover 6.
Drifting buoy main body includes solar panel power generation part, wave-energy power generation part and controller part 1, institute Stating solar panel power generation part includes solar panel 5, and solar panel is arranged in transparent outer cover 6.This practicality New solar panel 5 is mounted on the top of main body cover 23.It is smaller in view of solar cell monolithic output voltage, therefore Using 5 solar panels.It is limited be subject to drifting buoy overall space, therefore by the way of being installed using space, such as 3 institute of attached drawing Show, intermediate solar panel is horizontally mounted, remaining four pieces of solar panel is respectively in horizontal positioned solar cell Four Peripheral rakes of plate are placed, tilted-putted four pieces of solar panels towards horizontal positioned solar panel, And the angle of inclination of tilted-putted four pieces of solar panels is 45 °.Such mounting structure ensure that the system of can obtain Required voltage also meets the space requirement of entire drifting buoy.When in bright and sunny weather, solar panel After absorbing luminous energy opto-electronic conversion occurs for the semi-conducting material in 5, generates electric current, the electric current of generation is conveyed to control by conducting wire Device part 1.
Mechanical movement is mainly become electric energy by generator, and the utility model uses cylinder type permanent magnet linear generator, will Linear motion mechanical energy is converted to electric energy.Wave-energy power generation part includes wave energy capture mechanism and cylinder type permanent magnet linear generates electricity Machine, wave energy capture mechanism and power generation organizational separation, power generation mechanism is mounted on inside main body cover 23, and wave energy capture mechanism Mounted on the outside of drifting buoy main body cover 23, this avoid because influencing wave capture during the gravity of buoy and generator Mechanism ripple obtains wave energy.Cylinder type permanent magnet linear generator is arranged at the top in main body cover 23, cylinder type permanent magnet linear hair Motor includes kinematic axis 25, sets on kinematic axis 25 there are two types of opposite polarity permanent magnet, between two kinds of opposite polarity permanent magnets Every being distributed on kinematic axis 25, mover yoke 3 is installed on kinematic axis 25 between opposite polarity permanent magnet, and kinematic axis 25 Periphery is equipped with winding 13.The lower end of kinematic axis 25 is also associated with tension spring 2,2 one end of tension spring connection kinematic axis, tension spring 2 it is another Partition plate 24 inside end connection main body cover 23.
Wave energy capture mechanism includes float 7 and stationary housing 9, and stationary housing 9 is connected with main body cover 23, and stationary cylinder Body 9 is in the outside on 23 top of main body cover.Stationary housing 9 is fixed on by fixed link 10 on main body cover 23, fixed link 10 One end is fixedly connected with main body cover 23, and 10 other end of fixed link is fixedly connected with stationary housing 9.Peace is rotated in stationary housing 9 Equipped with disk 11, axis hole 15 is offered on disk 11, disk 11 is connected with shaft 12,12 water of shaft by the interference fit of axis hole 15 It is flat to set, and shaft 12 is stretched into main body cover 23, the one end of shaft 12 away from disk 11 is rotatablely equipped with disc cam 14, And disc cam 14 is located at the downside of cylinder type permanent magnet linear generator kinematic axis 25.7 lower end of float is equipped with moving lever 8, fortune Lever 8 is vertically arranged, and moving lever 8 is stretched into stationary housing 9.Connecting rod is connected with by pin 1 and pin 2 21 on disk 11 16, pin 1 is located at the edge of disk 11 and one end port of connecting rod 16, and pin 2 21 is located at the center of disk 11 and connecting rod 16 Center, port of the connecting rod 16 away from pin 1 connect port of the moving lever 8 away from float 7 by pin 3 22.As shown in Fig. 2, work as When moving lever 8 moves up and down as driving link, the degree of freedom of wave energy capture mechanism is:
F=3 × 3-2 × 4-0 × 1=1
Driving link is equal with degree of freedom, so there is definite movement in the mechanism.When moving lever 8 moves up and down, disk 11 Round-trip rotary motion can be done.
Controller part 1 is arranged at the lower part of main body cover 23, and controller part 1 includes CPU, for by wave-energy power generation Part alternating current is converted to the AC/DC modular converters, power management module and the accumulator for storing electric energy of direct current, power supply Management module is used to manage the electric energy that wave-energy power generation part and solar panel 5 export, and after being handled by voltage regulation filtering It is input to accumulator.
The input terminal of the output terminal connection AC/DC modular converters of cylinder type permanent magnet linear generator, AC/DC modular converters Output terminal connects the input terminal of power management module, and solar panel 5 also connects the input terminal of power management module, power supply The output terminal connection accumulator of management module.
When the utility model is used, after wave is transmitted through coming, float 7 moves up and down with wave, and moving lever 8 is and then floating Son 7 moves up and down together.Since moving lever 8 is connected to by pin 3 22 on connecting rod 16, connecting rod 16 is under the action of moving lever 8 It moves up and down together.Since connecting rod 16 is connected to by pin 1 and pin 2 21 on disk 11, and wherein one of connection Point pin 2 21 is located at the center of disk 11, another tie point pin 1 is at the edge of disk 11, when one end of connecting rod 16 is done During lower movement, the other end can do reverse motions around the tie point in the center of circle.Disk 11 is with connecting by pin 1 and pin 2 21 What bar 16 connected, connecting rod 16 moves up and down, and disk 11 can do round-trip circular motion.Since shaft 12 and disk 11 are to pass through axis What hole 15 was interference fitted, shaft 12 can follow disk 11 to sit back and forth movement together.Shaft 12 can be with disk while rotation Shape cam 14 does identical movement.
When float 7 moves downward under wave action, disk 11 rotates counterclockwise, the shaft under the action of disk 11 12 also rotate counterclockwise, and 14 negative direction of disc cam can be by the kinematic axis 25 of cylinder type permanent magnet linear generator slowly when rotating It jacks up so that kinematic axis 25 moves upwards.After a tooth pitch is moved to, overturning variation occurs for flow direction, as shown in figure 5, It will be overturn and changed by the flow direction of coil when kinematic axis 25 is continuously moved upwards, coil can induce exchange potential.
When float 7 moves upwards under wave action, disk 11 rotates clockwise, and shaft 12 rotates clockwise, disk 14 positive direction of shape cam rotates and slowly ineffective, and the kinematic axis 25 of cylinder type permanent magnet linear generator is in tension spring 2 It is moved downward under stretching action, generates the overturning variation of flow direction, continuous movement generates sensing exchange potential.So transport repeatedly Dynamic, cylinder type permanent magnet linear generator can export alternating current, and the confession of drifting buoy device can be so realized in wind and rain weather Electricity.
Assuming that the speed that kinematic axis 25 moves upwards is vt, can be obtained according to the characteristic of permanent magnet linear generator and parameter Winding calculation of lightning induced voltage formula is:
Wherein:
ephIt is winding induced voltage;
Z is the displacement that kinematic axis 25 rises;
vtThe speed that kinematic axis 25 moves upwards;
KEFor voltage constant;
T λ are 2 times of wave wavelength;
Voltage constant KECalculation formula it is as follows:
Wherein:vavIt is the average speed of axis of motion;
It is gap magnetic flux density;
Nph=NcPq is the coil number of each phase, and p is magnetic pole logarithm, and q is slot number;
WsStator width;
MsThe quantity of armature;
Gap magnetic flux density can be used to lower calculation formula:Gap magnetic flux density:
Wherein:
BrThe core flux density allowed for kinematic axis;
hmFor the height of magnet;
HcFor enforceable magnetic field intensity;
μ0For space permeability;
geq=Kc·gaFor effective air gap;
KcFor Carter's coefficient;
gaFor air gap.
Float using common size, the cylinder type permanent magnet linear of general power can be calculated by above-mentioned theory formula Generator, the device designed using the utility model, the voltage of output can be used for drifting buoy system.
After solar panel 5 and cylinder type permanent magnet linear output generator current, controller part 1 is sent to. After processing by controller power source management module, store in accumulator and used for drifting buoy.The present apparatus is in fine day and wind Rainy day gas can work, and realize the long-term self-powered of drifting buoy.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, on the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improve and Retouching also should be regarded as the scope of protection of the utility model.

Claims (4)

1. a kind of wave energy and the drifting buoy self-power supply device of solar energy complementation, it is characterised in that:Including drifting buoy main body With main body cover (23), the main body cover (23) is internal to be divided into upper and lower part, and the main body cover by partition plate (24) (23) external upper end is covered with transparent outer cover (6);
The drifting buoy main body includes solar panel power generation part, wave-energy power generation part and controller part (1), The solar panel power generation part includes solar panel (5), and the solar panel is arranged at transparent outer cover (6) In;
The wave-energy power generation part includes wave energy capture mechanism and cylinder type permanent magnet linear generator, the cylindrical permanent Linear electric generator is arranged at the top in main body cover (23), and the cylinder type permanent magnet linear generator includes kinematic axis (25), It is set on the kinematic axis (25) there are two types of opposite polarity permanent magnet, described two opposite polarity permanent magnets are distributed in On kinematic axis (25), mover yoke (3), and the movement are installed on the kinematic axis (25) between opposite polarity permanent magnet The periphery of axis (25) is equipped with winding (13);The lower end of the kinematic axis (25) is also associated with tension spring (2), the tension spring (2) one End connection kinematic axis, the partition plate (24) of other end connection main body cover (23) inside of the tension spring (2);The wave energy capture Mechanism includes float (7) and stationary housing (9), and the stationary housing (9) is connected with main body cover (23), and stationary housing (9) In the outside on main body cover (23) top;Disk (11) is rotatablely equipped in the stationary housing (9), on the disk (11) Axis hole (15) is offered, the disk (11) is connected with shaft (12), shaft (12) water by axis hole (15) interference fit It is flat to set, and shaft (12) is stretched into main body cover (23), the one end of the shaft (12) away from disk (11) is rotatablely equipped with Disc cam (14), and the disc cam (14) is located at the downside of cylinder type permanent magnet linear generator kinematic axis (25);It is described Float (7) lower end is equipped with moving lever (8), and the moving lever (8) is vertically arranged, and the moving lever (8) stretches into stationary housing (9) in;Connecting rod (16) is connected with by pin one (17) and pin two (21) on the disk (11), the pin one (17) is located at disk (11) edge and one end port of connecting rod (16), the pin two (21) are located in the center and connecting rod (16) of disk (11) The heart, port of the connecting rod (16) away from pin one (17) connect port of the moving lever (8) away from float (7) by pin three (22);
The controller part (1) is arranged at the lower part of main body cover (23), and the controller part (1) includes CPU, for general Wave-energy power generation part alternating current is converted to the AC/DC modular converters of direct current, power management module and for storing electric energy Accumulator, the power management module are used to manage the electric energy of wave-energy power generation part and solar panel (5) output, and lead to Accumulator is input to after crossing voltage regulation filtering processing;
The input terminal of the output terminal connection AC/DC modular converters of the cylinder type permanent magnet linear generator, the AC/DC conversions The input terminal of the output terminal connection power management module of module, and the solar panel (5) also connects power management module Input terminal, the power management module output terminal connection accumulator.
2. a kind of wave energy as described in claim 1 and the drifting buoy self-power supply device of solar energy complementation, it is characterised in that: The solar panel (5) has five pieces, and one of solar panel is horizontal positioned, remaining four pieces of solar panel point It is not placed in horizontal positioned four Peripheral rakes of solar panel, tilted-putted four pieces of solar panel directions Horizontal positioned solar panel.
3. a kind of wave energy as claimed in claim 2 and the drifting buoy self-power supply device of solar energy complementation, it is characterised in that: The angle of inclination of tilted-putted four pieces of solar panels is 45 °.
4. a kind of wave energy as described in claim 1 and the drifting buoy self-power supply device of solar energy complementation, it is characterised in that: The stationary housing (9) is fixed on by fixed link (10) on main body cover (23), outside described fixed link (10) one end and main body Shell (23) is fixedly connected, and fixed link (10) other end is fixedly connected with stationary housing (9).
CN201720942699.2U 2017-07-31 2017-07-31 A kind of wave energy and the drifting buoy self-power supply device of solar energy complementation Expired - Fee Related CN207377699U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107288808A (en) * 2017-07-31 2017-10-24 南京信息工程大学 The complementary drifting buoy self-power supply device of a kind of wave energy and solar energy
IT202100009872A1 (en) * 2021-04-19 2021-07-19 Hydrosolar S R L Single span photovoltaic system mounted on a floating structure for bodies of water, anchored to the shore with Adaptive Smart Strap systems
IT202100009869A1 (en) * 2021-04-19 2021-07-19 Hydrosolar S R L Double span photovoltaic system mounted on a floating structure for bodies of water, anchored to the shore with Adaptive Smart Strap systems
WO2022224281A1 (en) * 2021-04-19 2022-10-27 Hydrosolar S.R.L. Single- or double-span photovoltaic system mounted on a floating structure for bodies of water, anchored on the shore with adaptive smart strap systems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107288808A (en) * 2017-07-31 2017-10-24 南京信息工程大学 The complementary drifting buoy self-power supply device of a kind of wave energy and solar energy
CN107288808B (en) * 2017-07-31 2024-02-27 南京信息工程大学 Wave energy and solar energy complementary drifting buoy self-power device
IT202100009872A1 (en) * 2021-04-19 2021-07-19 Hydrosolar S R L Single span photovoltaic system mounted on a floating structure for bodies of water, anchored to the shore with Adaptive Smart Strap systems
IT202100009869A1 (en) * 2021-04-19 2021-07-19 Hydrosolar S R L Double span photovoltaic system mounted on a floating structure for bodies of water, anchored to the shore with Adaptive Smart Strap systems
WO2022224281A1 (en) * 2021-04-19 2022-10-27 Hydrosolar S.R.L. Single- or double-span photovoltaic system mounted on a floating structure for bodies of water, anchored on the shore with adaptive smart strap systems

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