WO2018116276A1 - Générateur de mouvement d'onde basé sur un élastomère diélectrique à compensation de rigidité - Google Patents

Générateur de mouvement d'onde basé sur un élastomère diélectrique à compensation de rigidité Download PDF

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Publication number
WO2018116276A1
WO2018116276A1 PCT/IB2017/058362 IB2017058362W WO2018116276A1 WO 2018116276 A1 WO2018116276 A1 WO 2018116276A1 IB 2017058362 W IB2017058362 W IB 2017058362W WO 2018116276 A1 WO2018116276 A1 WO 2018116276A1
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WO
WIPO (PCT)
Prior art keywords
elastic membrane
compressible fluid
stiffness
membrane
insulated chamber
Prior art date
Application number
PCT/IB2017/058362
Other languages
English (en)
Inventor
Marco Fontana
Luca DANIELE
Giacomo MORETTI
Francesco DAMIANI
Michele RIGHI
Rocco Vertechy
Boris TEILLANT
Miguel VICENTE
Antonio SARMENTO
David Forehand
David Ingram
Original Assignee
Scuola Superiore Sant'anna
Alma Mater Studiorum Universtita' Di Bologna
Wave Energy Centre – Centro De Energia Das Ondas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scuola Superiore Sant'anna, Alma Mater Studiorum Universtita' Di Bologna, Wave Energy Centre – Centro De Energia Das Ondas filed Critical Scuola Superiore Sant'anna
Publication of WO2018116276A1 publication Critical patent/WO2018116276A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/148—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the static pressure increase due to the wave
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
    • F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
    • F03B13/188—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is flexible or deformable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/70—Application in combination with
    • F05B2220/709—Piezoelectric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/97—Mounting on supporting structures or systems on a submerged structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/20—Purpose of the control system to optimise the performance of a machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/20—Purpose of the control system to optimise the performance of a machine
    • F05B2270/202—Tuning to wave conditions
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the present invention falls within the technical field concerning electric power generators that use non-polluting renewable energies, such as the wave motion of the seas.
  • the transducers which, in general, fall into the aforementioned typology already find applications in other fields; one of the most common is represented by the microphones, in which the sound waves generated by the voice or by other sounds are switched into electrical impulses to be sent to a recorder or to an amplifier.
  • the specular application are the loudspeakers, in which the electrical signal determines the vibration of the membrane translator, which generates sound waves reproducing sounds and voices.
  • a specific type of electromechanical transducer is that of dielectric elastomer generators.
  • the latter are deformable systems, based on polymeric materials, able to convert mechanical energy into electrical energy in a direct way.
  • a dielectric elastomer generator is a deformable electrical capacitor, consisting of one or more dielectric elastomer membranes (capable of undergoing deformations over 500% of its initial length) coated with deformable electrodes.
  • the mechanism of energy conversion is based on the principles of electrostatics (in fact there is no significant or functional contribution from electromagnetic or electrodynamic phenomena).
  • an operating cycle provides that from an initial configuration the elastic membrane is deformed by the mechanical work of an external source up to a dilated configuration, after which the generator is activated by imposing a voltage to the electrodes. Subsequently the membrane is left free to return to the initial configuration.
  • the dilated configuration and the initial configuration there is a reduction in capacity which causes an increase in the potential energy of the charges present on the electrodes (part of the mechanical work previously done on the system is converted into electrical energy). Finally, the capacitor is completely discharged, thus recovering an amount of electrical energy greater than that spent to activate it.
  • the most simple type of said transducer is essentially constituted by a sandwich of three layers, obtained by two externals deformable conductive layers (electrodes) made for example of thin metal films (obtained by sputtering), or conductive elastomeric materials, which are separated by a dielectric elastomeric material.
  • the transformation into electric current takes place, preferably, by means of an electromechanical generator with an elastic membrane.
  • the energy produced can be used directly for the propulsion of the boat or to feed onboard services or stored in batteries for other uses.
  • WO2008133774 it is defended another system to obtain electric current from the sea waves, by electromechanical transducers in which electroactive polymers are present.
  • the system includes a sort of vertical bellows, in which the lower plate is anchored at a fixed height from the seabed while the upper one moves vertically by the waves action; inside the bellows there are a certain number of elastically extendable rods which constitute said electromechanical transducers, connected above and below the aforementioned plates and which are induced to follow the variation in distance which continuously intervenes between them, thereby producing electrical current.
  • a generator formed by an elastically extensible electromechanical transducer which can take the form of a membrane or an elongated body, capable of generating electric current.
  • German patent application DE 10 2009 053393 describes a system for extracting wave energy in which a dielectric elastomer generator is associated with a buoy.
  • the device is constituted by a rigid box-shaped structure defining at least a chamber insulated from the outside closed by an elastic membrane of said dielectric elastomeric generator, with the aforesaid rigid box-shaped structure designed to be partially immersed in the sea in a way that an outer side of the elastic membrane is subjected to the action of the wave motion.
  • the device is anchored to the seabed and floating thanks to the air inside the insulated chamber.
  • the wave energy converter in order to be efficient, must be dynamically tuned (eg resonant) with the typical frequencies of the sea waves, to ensure efficient operation and high wave energy capture factor. To do this, it is necessary to properly calibrate the stiffness of the device to match the dynamic response with the wave frequency. It is necessary to tune the device with different sea conditions, for example by adjusting the stiffness when sea conditions change.
  • the object of the present invention is to propose a device for generating electric current by means of marine waves, which for this purpose exploits the properties of a dielectric elastomer generator, but incorporates technical solutions suitable for making the same device usable in the actual use conditions, maximizing the extracted energy by tuning the natural frequency of the device with that of the incident waves and being able to withstand even extreme stresses in the event of a storm.
  • a specific object of the invention is to propose a device for generating electric power by means of marine waves through which it is possible to realize a tuning between the frequency of the waves and the natural frequency of the device by means of a negative hydrostatic stiffness effect in order to compensate for the elastic stiffness of the dielectric elastomer.
  • a further object of the invention is to propose a device for generating electric current by means of marine waves, which can be used in a simple and effective way to adjust the dynamic response (stiffness) of the system according to the sea conditions in order to both tuning the natural frequency with that of the waves and limiting the deformations of said dielectric elastomeric generator within pre- established limits.
  • a further object of the invention is to provide a device of simple design, devoid of moving rigid bodies that can easily deteriorates in the marine environment, therefore reliable over time and not very expensive in terms of periodic maintenance.
  • Another object of the invention is to provide a compact device, which can also be installed in relatively low seabeds, therefore not too far from the shore, with evident benefits in installation costs and with advantageous containment of the length of the cables intended to transport the electrical energy produced on the mainland.
  • a device for generating electric current by means of marine waves of the type comprising at least one dielectric elastomeric generator designed to be deformed and/or elongated by the thrust action received from the marine wave motion, with the aforesaid device characterized in that it comprises:
  • a rigid box-shaped structure defining at least one chamber insulated from the outside, closed at the top by an elastic membrane of said dielectric elastomeric generator, with the aforementioned rigid box-shaped structure designed to be immersed in the sea so that the top side of the aforementioned elastic membrane is subjected to the action of the wave motion; wherein geometrical, physical and/or installation parameters of said device are defined such that the combination of negative hydrostatic stiffness and positive elastic stiffness of the elastic membrane gives the device a natural frequency contained in the frequency range typical of wave motions, that is, in a range from 0.05 Hz to 0.3 Hz.
  • the peculiar definition of the geometrical, physical and installation parameters of the device allows to exploit the effect of negative stiffness to match the natural frequency of the device with that of the wave motion without introducing additional components, taking advantage of the particular geometry of the device. This allows to realize devices with high performances of energy capture from wave motion while limiting the dimensions of the device itself.
  • the device includes:
  • - elastic response variators means comprising a compressible fluid introduced by pressure into said insulated chamber, affecting the inner side of said elastic membrane;
  • Fig. 1 shows a schematic side view, in section, of the device in question, positioned on a seabed, in a not working condition;
  • Fig. 2 shows a plan view of the device of Fig. 1 ;
  • FIG. 3 shows views similar to Fig. 1 with the device working.
  • the device 1 is of the type comprising at least one dielectric elastomeric generator comprising an elastic membrane 2, capable of generating electrical current when subjected to elongation and/or deformation stresses impressed by an external mechanical energy source.
  • the aforementioned dielectric elastomeric generator is for example made of several layers of elastomeric material interposed between deformable laminar electrodes, so as to form a set of capacitors associated mechanically in series but electrically in parallel.
  • a rigid box-shaped structure 3 is provided defining at least a chamber 4 insulated from the outside, closed at the top by the elastic membrane 2 of said dielectric elastomeric generator.
  • the insulated chamber 4 has a cylindrical shape and the elastic membrane 2 has a circular shape.
  • the rigid box-shaped structure 3 is designed to be immersed in the sea M so that the upper side 2A of the elastic membrane 2 is subjected to the action of the overlying wave motion.
  • the rigid box-shaped structure 3 is held steady with respect to the seabed, FM, in proximity and resting on it, as illustrated in the figures, or maintained at a constant height, however in such a way as to cancel the hydrodynamic stresses admiring on the rigid box-shaped structure 3 itself.
  • the illustrated flow collector 30 has also a cylindrical section.
  • the flow collector 30 is designed to convey the hydrodynamic motion of the aforementioned marine waves to the underlying electromechanical elastic membrane generator, according to the differential pressure principle.
  • the device 1 also comprises dynamic response variator means 5, arranged for example outside the insulated chamber 4 and provided for introducing in pressure into the latter a compressible fluid 6 (air or gas), intended to affect the inner side 2B of the mentioned elastic membrane 2.
  • dynamic response variator means 5 arranged for example outside the insulated chamber 4 and provided for introducing in pressure into the latter a compressible fluid 6 (air or gas), intended to affect the inner side 2B of the mentioned elastic membrane 2.
  • the dynamic response variator means 5 are constituted, for example by at least one tank 50 for said compressible fluid 6 and by known members 51 , 52 (pumps, pipes, solenoid valves, pressure gauges and other components, not shown in detail) for the inflow and the outflow of the same compressible fluid 6 towards and from said insulated chamber 4.
  • the device unlike other known solutions, is shaped so as to exploit the wave motion according to the differential pressure principle.
  • the aforesaid device achieves a negative hydrostatic stiffness effect because to a deformation of the dielectric elastomeric membrane 2 downwards corresponds an increase in the hydrostatic pressure which tends to further deform the membrane 2 itself downwards (and vice versa, to a deformation upward corresponds a decrease of the hydrostatic pressure on the membrane).
  • This negative hydrostatic stiffness has clearly opposite contribution with respect to the elastic stiffness of the dielectric elastomeric membrane, whose stiffness is positive because to an increase in deformation (expansion of the membrane downwards) corresponds an increase in the elastic return forces on said membrane.
  • the abovesaid effect is exploited by suitably defining geometrical, physical and installation parameters of the device in such a way that the combination of negative hydrostatic stiffness and positive elastic stiffness of the elastic membrane 2 give the device 1 a natural frequency contained in the typical frequencies range of the wave motions, that is to say, in a range between 0.05 Hz and 0.3 Hz.
  • This peculiar and innovative definition of the geometrical, physical and installation parameters of the device that make it possible to exploit the negative hydrostatic stiffness of the elastic membrane 2 leads to the considerable advantage of being able to realize devices 1 having high performances for capturing energy from wave motion while limiting the dimensions of the device itself.
  • the dynamic response of the system comprising the elastic membrane 2 is overall changed.
  • the dynamic response variator means 5 can easily be set up to be remotely controlled with suitable organs, and/or connected to a weather station with appropriate interface means for being able to adapt in advance, and automatically, to the forecasts relating to the sea conditions.
  • the aforementioned effect of negative hydrostatic stiffness it is indeed possible to counteract the effect of positive mechanical stiffness of the dielectric elastomeric membrane.
  • This allows, through an appropriate selection of the design parameters, in particular geometrical, physical and of installation, to intrinsically obtain a natural frequency of the device comparable to that of the sea waves, while limiting the dimensions. More precisely, the diameter, the thickness and the preload of the elastic membrane 2, as well as the installation depth below the sea level of the device 1 , are defined and combined so as to give the device 1 a natural frequency contained in the typical frequency range of the wave motions, that is between 0.05Hz and 0.3Hz.
  • the device can be even more precisely and efficiently tuned with the wave motion in the real use conditions and in the presence of different wave motion conditions and can be able to withstand even extreme stresses in the event of a storm.
  • An advantage of the invention consists in realizing the device in such a way that its main components are particularly resistant to deterioration in the marine environment, making the device itself reliable over time and not very expensive in terms of periodic maintenance.
  • the device can also be installed in relatively low seabeds, therefore not too far from the shore, still guaranteeing high efficiency; with this, evident benefits are obtained in the installation costs (and maintenance) and in the containment of the lenght of the cables intended to transport the electric energy produced on the mainland.
  • the tank 50 which in the example shown is located outside the rigid box-shaped structure 3 could be housed inside it, for example at the bottom, or in a gap between an outer wall and an inner wall.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

L'invention concerne un dispositif (1) de production de courant électrique au moyen des vagues de la mer. Ce dispositif comprend une structure rigide en forme de caisson (3) immergée dans la mer (M), qui définit une chambre isolée (4) fermée au sommet par la membrane élastique (2) d'un générateur élastomère diélectrique, dont le côté supérieur (2A) est soumis à l'action de la vague. Dans la chambre isolée (4), il est prévu un fluide compressible sous pression (6), dont la pression peut être régulée pendant le fonctionnement au moyen de moyens de variateur de réponse dynamique (5), comprenant des éléments (51, 52) pour le débit entrant et le débit sortant. La géométrie particulière du dispositif conduit à la combinaison d'un effet de rigidité hydrostatique négative (les forces hydrostatiques tendent plus à déformer la membrane (2) vers le bas, plus la membrane (2) elle-même est déformée) qui est opposée à la rigidité élastique positive intrinsèque de la membrane élastique (2), permettant à la fréquence naturelle du dispositif d'être accordée à la fréquence typique des vagues de mer par l'intermédiaire d'une sélection appropriée des paramètres de conception. Par augmentation ou réduction de la pression du fluide compressible (6) dans la chambre isolée (4), plus, les rigidité hydrostatique négative et rigidité élastique positive augmentent ou diminuent la rigidité de la membrane élastique (2) et son niveau de déformabilité sous l'action dudit mouvement de vague, ce qui permet d'optimiser l'efficacité énergétique du dispositif dans les différentes conditions de la mer et d'assurer sa sécurité dans des conditions extrêmes.
PCT/IB2017/058362 2016-12-23 2017-12-22 Générateur de mouvement d'onde basé sur un élastomère diélectrique à compensation de rigidité WO2018116276A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000130691A IT201600130691A1 (it) 2016-12-23 2016-12-23 Generatore da moto ondoso basato su un elastomero dielettrico con compensazione di rigidezza
IT102016000130691 2016-12-23

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WO2018116276A1 true WO2018116276A1 (fr) 2018-06-28

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IT (1) IT201600130691A1 (fr)
WO (1) WO2018116276A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110700987A (zh) * 2019-09-20 2020-01-17 天津大学 一种基于介电弹性体的调谐液柱波能采集器
CN112442968A (zh) * 2020-11-24 2021-03-05 荆淑巧 一种水利工程防汛装置
CN113107746A (zh) * 2021-04-01 2021-07-13 湖南国天电子科技有限公司 一种基于介电弹性体材料的振荡水柱式波浪能供电装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997037123A1 (fr) * 1996-04-02 1997-10-09 A.P. Van Den Berg Beheer B.V. Convertisseur hydropneumatique immerge permettant d'exploiter l'energie des vagues
WO1999066198A1 (fr) * 1998-06-14 1999-12-23 Yosef Feldman Systeme hydrostatique servant a convertir l'energie des vagues
FR2906274A1 (fr) * 2006-09-27 2008-03-28 Acri In Soc Par Actions Simpli Installation et procede pour l'amortissement et/ou la recuperation de l'energie de la houle.
WO2008133774A1 (fr) * 2007-04-25 2008-11-06 Single Buoy Moorings, Inc. Systèmes de générateur d'énergie houlomotrice
US20090243298A1 (en) * 2008-03-25 2009-10-01 Jean Philippe F Minimal wave power generator
DE102009053393A1 (de) * 2009-11-14 2011-05-19 Robert Bosch Gmbh Wellenenergietransformer mit elektroaktiver Polymerfolie

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011086256A1 (de) * 2011-11-14 2013-05-16 Robert Bosch Gmbh Wellenenergiewandler mit elektroaktiven Polymeren

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997037123A1 (fr) * 1996-04-02 1997-10-09 A.P. Van Den Berg Beheer B.V. Convertisseur hydropneumatique immerge permettant d'exploiter l'energie des vagues
WO1999066198A1 (fr) * 1998-06-14 1999-12-23 Yosef Feldman Systeme hydrostatique servant a convertir l'energie des vagues
FR2906274A1 (fr) * 2006-09-27 2008-03-28 Acri In Soc Par Actions Simpli Installation et procede pour l'amortissement et/ou la recuperation de l'energie de la houle.
WO2008133774A1 (fr) * 2007-04-25 2008-11-06 Single Buoy Moorings, Inc. Systèmes de générateur d'énergie houlomotrice
US20090243298A1 (en) * 2008-03-25 2009-10-01 Jean Philippe F Minimal wave power generator
DE102009053393A1 (de) * 2009-11-14 2011-05-19 Robert Bosch Gmbh Wellenenergietransformer mit elektroaktiver Polymerfolie

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110700987A (zh) * 2019-09-20 2020-01-17 天津大学 一种基于介电弹性体的调谐液柱波能采集器
CN110700987B (zh) * 2019-09-20 2021-02-12 天津大学 一种基于介电弹性体的调谐液柱波能采集器
CN112442968A (zh) * 2020-11-24 2021-03-05 荆淑巧 一种水利工程防汛装置
CN113107746A (zh) * 2021-04-01 2021-07-13 湖南国天电子科技有限公司 一种基于介电弹性体材料的振荡水柱式波浪能供电装置
CN113107746B (zh) * 2021-04-01 2023-03-10 湖南国天电子科技有限公司 一种基于介电弹性体材料的振荡水柱式波浪能供电装置

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