CN102345552B - Piezoelectric sea wave power generation system - Google Patents
Piezoelectric sea wave power generation system Download PDFInfo
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- CN102345552B CN102345552B CN2010102422495A CN201010242249A CN102345552B CN 102345552 B CN102345552 B CN 102345552B CN 2010102422495 A CN2010102422495 A CN 2010102422495A CN 201010242249 A CN201010242249 A CN 201010242249A CN 102345552 B CN102345552 B CN 102345552B
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- 238000010248 power generation Methods 0.000 title claims abstract description 27
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- 230000000694 effects Effects 0.000 claims abstract description 14
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- 229910000831 Steel Inorganic materials 0.000 claims description 10
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- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 abstract description 2
- 230000000737 periodic effect Effects 0.000 abstract 1
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- 239000013078 crystal Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
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- 238000005452 bending Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 238000004873 anchoring Methods 0.000 description 1
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- 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
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Abstract
The invention discloses a piezoelectric sea wave power generation system. A twin-float ship fluctuates with sea waves to drive a hydraulic cylinder to pump liquid into a high-pressure tank, so that hydraulic energy of the liquid is formed to implement the sea wave power generation system; static pressure energy of the liquid is used to drive a motor to drive a rotating shaft piston to rotate, so that pressure of the liquid in the hydraulic cylinder is changed, and the function of a hydraulic vibration system is realized; and quasi-simple harmonic vibration is formed through the pressure change of the liquid to drive the piston to apply pressure stress of the quasi-simple harmonic vibration to a piezoelectric stack, so that mechanical energy is converted into electric energy through the direct piezoelectric effect of piezoelectric ceramic in a d33 mode, the piezoelectric stack is electrically connected with a rectifier bridge and an energy storage in turn, and the function of a piezoelectric conversion system is realized. The piezoelectric sea wave power generation system has the advantages that: the highest piezoelectric constant is used, the frequency of applying applied force is improved, conversion efficiency is greatly improved, instability caused by the periodic change and amplitude change of the sea waves is avoided, force applied to the piezoelectric ceramic is pressure, the natural long life of a piezoelectric transducer is kept, the system is easy to recycle and adjust, and the like.
Description
Technical field
The present invention relates to a kind of sea wave power generation system, relate in particular to the system that a kind of d33 of employing mode piezoelectric ceramic carries out seawave power generation.
Background technique
Great energy is contained in the ocean, and 71% of the ball gross area is taken up an area in the ocean.The United Nations in 1992 classify seawave power generation as the first place of exploitation regenerable marine energy, and Britain is placed on the research of seawave power generation the first place of new energy development, even are called " the 3rd energy ".The Patents of relevant seawave power generation has thousands of more than in the world, therefore can predict, and seawave power generation will not only become the important sources of renewable energy sources, also will become human from now on main energy sources mode.
First is Princeton ocean power company with the piezoelectricity transformation applications on extensive seawave power generation in the world.First piezoelectric generator abbreviation HPE, sheet, web-like or the banded piezopolymer component network between the floating drum and anchor forms in the ocean by being suspended on.When floating drum floated in wave, polymer was stretched and loosens, and produces the high pressure low-frequency current, and this electric current is admitted to the electrode that links to each other with polymer, and was adjusted to high voltage direct current by solid electronic device, then was sent on the bank by submarine cable.In case disembarkation can be converted into again Ac feed-in electrical network.Wave energy is free, and piezopolymer almost or fully need not maintenance.Polymer is not subjected to seawater corrosion, and can at the end be reclaimed row its projected life in 20 years again and adjust.Can say that the piezoelectricity transformation applications is that its unique advantage is arranged to seawave power generation.
The output power of piezoelectric transducer is proportional to active force, applies frequency and the piezoelectric crystal of active force.For HPE, because then must cause the frequency that applies active force lower (only the several seconds once) on the piezopolymer using floating drum to act directly on; Again because be that utilization stretches and bending is the d31 pattern, the relative d33 pattern of its piezoelectric crystal is lower, more crucial is that piezoelectric constant has good compressive strength, but tensile strength is very low, so when utilizing stretching and bending force, can not use piezoceramic material, although the toughness of piezoelectric material of having utilized the very big raising of polymer in the life-span that has strengthened piezoelectric device, also greatly reduces piezoelectric crystal simultaneously.Whole generating efficiency is subjected to the restriction of these three factors to make its generated output that multikilowatt only be arranged at present, and cost is higher.
In various patents about seawave power generation, relate to most of the employing immediately of wave transformation of energy and transform, the storage of considering sea wave energy is seldom arranged, and consider that its energy conversion efficiency of sea wave energy storage is lower." a kind of wave-type electric generator " as Chinese patent application 00228121.X provides is comprised of kickboard, fuel tank, accumulator, rotating hydraulic cylinder, oil hydraulic motor and generator.Be connected by oil pipe between rotating hydraulic cylinder and the oil hydraulic motor, wherein high-voltage tube is provided with accumulator, and low pressure fuel pipe is provided with fuel tank; Rotating hydraulic cylinder is located at the kickboard place.Under the effect of wave, the swing that utilizes kickboard to produce drives rotating hydraulic cylinder work, produces high pressure oil in the oil hydraulic cylinder and promotes the oil hydraulic motor rotation, thereby drive the generator generating.
Above-mentioned patent is the kinetic energy that sea wave energy is converted into coil type generating rotor, and it utilizes hydraulic pressure installation to carry out the storage of energy, and this brings persistency with regard to the generation of giving electric energy, so that the impacts such as the periodicity of wave and amplitude reduce to minimum.But it drives the generator generation mode with oil hydraulic motor, because oil hydraulic motor is lower with the efficient that static energy is converted to rotor kinetic energy, so whole generating efficiency must reduce.
The patent that also has is as collecting unrestrained plate, thereby employing is the rotation that pressure stress that impact force with wave is converted to liquid in the oil hydraulic cylinder drives turbine, comes rotor driven to make the generating of coil type generator set by turbine again.Shortcoming is clearly, and collecting unrestrained plate requirement floating drum will exert oneself to produce huge Driving force simultaneously in certain limit, and " simultaneously " property will make the complexity of system improve.And the energy conversion efficiency of turbine is also lower in ocean environment.
Summary of the invention
In order to overcome defects, the invention provides a kind of piezoelectric sea wave power generation system, this power generation system structure is simple, cost is relatively cheap, transformation efficiency is high, and practical.
The present invention for the technological scheme that solves its technical problem and adopt is:
A kind of piezoelectric sea wave power generation system mainly comprises sea wave power system, hydraulic vibrating system and piezoelectricity converting system, wherein:
Described sea wave power system comprises double-floating drum ship, the first oil hydraulic cylinder and pressure pan, described double-floating drum ship is fixedly connected with the first oil hydraulic cylinder, described double-floating drum ship can drive the first oil hydraulic cylinder with the heave of waves liquid in this first oil hydraulic cylinder is pumped in the pressure pan, thereby the kinetic transformation that makes wave is the static energy of liquid, finish the sea wave power systemic-function, this structure is: pass through pipeline communication between described the first oil hydraulic cylinder and pressure pan, and be provided with first one-way valve that only can make liquid flow to pressure pan from described the first oil hydraulic cylinder at this pipeline; Be provided with first piston at described the first oil hydraulic cylinder, be fixed with the first static pulley and the second static pulley on this double-floating drum ship; The first cable one end and first piston are connected, and the first cable the other end connects by the first static pulley and anchoring, and anchor can make the pressure in the first oil hydraulic cylinder increase when moving by the first static pulley tension first piston; The second cable one end and first piston are connected, and the second cable the other end is connected by the second static pulley and weight, when weight moves by the second static pulley tension first piston the pressure in the first oil hydraulic cylinder are reduced.Double-floating drum ship dipping and heaving not only under the effect of wave, but also under the promotion of wave, to a direction skew.When double-floating drum ship during away from anchor, the first cable is pulling force, and move by the first static pulley pulling first piston, first piston rises by the second cable and the second static pulley pulling weight and heavy load potential energy is increased, first piston produced vertical the first cylinder and inside pressure and made that pressure increases the first oil hydraulic cylinder in this moment, and then made the first oil hydraulic cylinder by the first one-way valve highly pressurised liquid be pumped in the pressure pan form storage with static energy;
Described hydraulic vibrating system comprises motor and the second oil hydraulic cylinder, motive bearing one end of this motor extends out and is connected into mutually together axle with the rotating shaft piston, this rotating shaft piston seal is movably set in the second oil hydraulic cylinder, described motor can drive the rotating shaft piston rotation and make the second piston produce simple harmonic oscillation in the second oil hydraulic cylinder, thereby finish the hydraulic vibrating system function, its structure is: described motor is oil hydraulic motor, pass through pipeline communication between described pressure pan and the motor, and be provided with second one-way valve that only can make liquid be flowed to motor by pressure pan at this pipeline, thereby realize that drive motor rotates, certainly direct current or alternating current motor then need not hydraulic driving in this way for motor, alternating current motor then need be used speed reducer, these as long as generally speaking can drive the rotating shaft piston rotation, all are this routine claimed scope all for being equal to replacement; Described the second oil hydraulic cylinder is isolated into a hydraulic pressure cavity and a cavity by the second piston, and described rotating shaft piston is movably set in this hydraulic pressure cavity; Be provided with low pressure (LP) cylinder, the hydraulic pressure cavity of described the second oil hydraulic cylinder is provided with high pressure entry and low tension outlet, pass through pipeline communication between the high pressure entry of this second oil hydraulic cylinder and the pressure pan, pass through pipeline communication between the low tension outlet of this second oil hydraulic cylinder and the low pressure (LP) cylinder, described rotating shaft piston is provided with a pair of through hole, this is communicated with the hydraulic pressure cavity of through hole with described the second oil hydraulic cylinder, only can make during described rotating shaft piston rotation described this to through hole in the through hole and the conducting of one of described high pressure entry and low tension outlet, open or closed condition thereby one of high pressure entry and low tension outlet are in; Pressure pan drives oil hydraulic motor and drives the rotating shaft piston rotation, when the through hole on the rotating shaft piston and high pressure entry connection, low tension outlet is closed, and liquid flows to the second oil hydraulic cylinder from pressure pan, pressure increases in the second oil hydraulic cylinder thereby make, and makes the second piston produce corresponding stress; When the rotating shaft piston rotation disconnects and when being communicated with low tension outlet, the interior liquid of the second oil hydraulic cylinder flows to low pressure (LP) cylinder from low tension outlet, thereby the interior pressure of the second oil hydraulic cylinder is reduced to through hole and high pressure entry, the stress on the second piston reduces and even disappears;
Described piezoelectricity converting system comprises piezoelectric stack, rectifier bridge and accumulator, in the described hydraulic vibrating system in the second oil hydraulic cylinder the simple harmonic oscillation of the second piston can produce to piezoelectric stack the pressure stress of accurate simple harmonic oscillation, thereby make the direct piezoelectric effect of d33 mode piezoelectric ceramic that mechanical energy is converted into electric energy, every one deck at piezoelectric stack is drawn upper/lower electrode, mutually forms one of series, parallel and series-parallel circuit and reaches suitable output power parameter and be electrically connected successively rectifier bridge, accumulator, change-over circuit and output circuit.The charge property that the positive and negative electric charge that produces in each cycle through the effect of rectifier bridge all is converted into requirement is stored in the accumulator, be adjusted into high frequency ac signal and carry out the output attribute coupling through output circuit adjustment voltage and phase place through change-over circuit, finish piezoelectricity converting system function.
As another embodiment of the invention, outside described the first oil hydraulic cylinder, be provided with steel frame construction, the first piston steel frame construction that is connected, first and second cable is fixed respectively in the relative both sides of steel frame construction, realizes the be connected function of first and second cable of first piston with this.
As a further improvement on the present invention, connect by pipeline between described the first oil hydraulic cylinder and the low pressure (LP) cylinder, and between this pipeline, be provided with the one-way valve that only can make liquid flow to the first oil hydraulic cylinder from low pressure (LP) cylinder.
As a further improvement on the present invention, the structure that the simple harmonic oscillation of the second piston can produce the pressure stress of accurate simple harmonic oscillation to piezoelectric stack in the second oil hydraulic cylinder in the described hydraulic vibrating system is: fix a support at the double-floating drum ship, place piezoelectric stack at this support, and make the certain precompression of formation between the second piston and the piezoelectric stack.
As a further improvement on the present invention, described piezoelectric stack is to utilize the direct piezoelectric effect of d33 pattern to come switching energy.
The invention has the beneficial effects as follows: use the d33 mode piezoelectric ceramic to carry out seawave power generation as the Conversion of Energy main body, utilize hydraulic pressure installation, transformation mode by sea wave energy-static energy-vibrational energy-electric energy, utilize the highest piezoelectric crystal, improved the frequency that applies active force, improved greatly conversion efficiency, the unstability of having avoided Periods and changes in amplitude to bring, the power that piezoelectric constant is applied is pressure, has kept the intrinsic long lifetime of piezoelectric transducer, easily reclaims the advantages such as adjustment.
Description of drawings
Fig. 1 is the plan view of piezoelectric sea wave power generation system of the present invention;
Fig. 2 is the side view of piezoelectric sea wave power generation system of the present invention.
By reference to the accompanying drawings, make the following instructions:
1---weight 2---double-floating drum ship
3---anchors 4---the first cable
5---first static pulley 6---the first oil hydraulic cylinder
7---steel frame construction 8---pressure pan
9---motors 10---the second piston
11---piezoelectric stacks 12---the second one-way valve
13---rotating shaft piston 14---high pressure entry
15---low tension outlets 16---the second oil hydraulic cylinder
17---low pressure (LP) cylinders 18---the second static pulley
19---first pistons 20---the first one-way valve
21---supports 22---the second cable
100---the sea level
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing and concrete mode of execution:
Fig. 1 is the piezoelectric sea wave power generation system schematic diagram, it has comprised weight 1, double-floating drum ship 2, anchor 3, the first cable 4, the second cable 22, the first static pulley 5, the second static pulley 18, the first oil hydraulic cylinder 6, the second oil hydraulic cylinder 16, steel frame construction 7, pressure pan 8, oil hydraulic motor 9, first piston 19, the second piston 10, piezoelectric stack 11, the first one-way valve 20, the second one-way valve 12, rotating shaft piston 13, high pressure entry 14, low tension outlet 15, low pressure (LP) cylinder 17, support 21, and the double-floating drum ship floats 2 and floats on the sea level 100.
Double-floating drum ship 2 dipping and heaving not only under the effect of wave, but also under the promotion of wave, to a direction skew.When double-floating drum ship 2 during away from anchor 3, be pulling force in the first cable 4, effect by the first static pulley 5, so that 4 pairs of steel frame constructions of the first cable 7 produce perpendicular to the first oil hydraulic cylinder 6 and inside pressure, at this moment the first oil hydraulic cylinder 6 pumps into highly pressurised liquid by the first one-way valve 20 that the form with static energy stores in the pressure pan 8; Pulling force in the first cable 4 makes weight 1 potential energy increase simultaneously.
During to anchor 3 motion, without active force, so that the first oil hydraulic cylinder 6 is subject to outside pulling force, at this moment the first oil hydraulic cylinder 6 sucks liquid in the low pressure (LP) cylinder 17 by one-way valve steel frame construction 7 double-floating drum ship 2 under the effect of weight 1 in the first cable 4 under the wave effect.
By the continuous active force of wave, thereby so that the first oil hydraulic cylinder 6 constantly sucks liquid from low pressure (LP) cylinder 17, and change into highly pressurised liquid and pump into pressure pan 8 and store.Finished like this Wave energy be converted into hydrostatic pressure in the pressure pan can step.
Pressure pan 8 drives oil hydraulic motors 9 and drives the operation that rotating shaft pistons 13 make liquid in the second oil hydraulic cylinder 16 be communicated with, disconnect with pressure pan 8, low pressure (LP) cylinder 17 respectively, the pressure of liquid in the second oil hydraulic cylinder 16 is changed, thereby form the accurate simple harmonic oscillation of micrometric displacement, large pressure so that produce the relevant pressure effect on the second piston 10, the effect of vibration of special piston forms a kind of quasi-static pressure stress at piezoelectric stack 11.Thereby the direct piezoelectric effect of utilizing the d33 mode piezoelectric ceramic is electric energy with the transformation of energy of wave.
Electric energy in the accumulator is sent on the bank by submarine cable.In case disembarkation is converted into again Ac feed-in electrical network, thereby finishes the purpose that reaches seawave power generation.
Claims (5)
1. a piezoelectric sea wave power generation system mainly comprises sea wave power system, hydraulic vibrating system and piezoelectricity converting system, it is characterized in that:
Described sea wave power system comprises double-floating drum ship (2), the first oil hydraulic cylinder (6) and pressure pan (8), described double-floating drum ship (2) is fixedly connected with the first oil hydraulic cylinder (6), between described the first oil hydraulic cylinder (6) and pressure pan (8), pass through pipeline communication, and be provided with first one-way valve (20) that only can make liquid flow to pressure pan (8) from described the first oil hydraulic cylinder (6) at this pipeline; Be provided with first piston (19) at described the first oil hydraulic cylinder (6), be fixed with the first static pulley (5) and the second static pulley (18) on this double-floating drum ship (2); The first cable (4) one ends and first piston (19) are connected, the first cable (4) the other end is connected by the first static pulley (5) and anchor (3), and anchor (3) can make the pressure in the first oil hydraulic cylinder increase when moving by the first static pulley (5) tension first piston; The second cable (22) one ends and first piston (19) are connected, the second cable (22) the other end is connected by the second static pulley (18) and weight (1), and weight can make the pressure in the first oil hydraulic cylinder reduce when moving by the second static pulley (18) tension first piston;
Described hydraulic vibrating system comprises motor (9) and the second oil hydraulic cylinder (16), motive bearing one end of this motor (9) extends out and is connected into mutually together axle with rotating shaft piston (13), and this rotating shaft piston (13) air-tight movable is sheathed in the second oil hydraulic cylinder (16); Described motor (9) is oil hydraulic motor, passes through pipeline communication between described pressure pan (8) and the motor (9), and is provided with second one-way valve (12) that only can make liquid be flowed to motor (9) by pressure pan (8) at this pipeline; Described the second oil hydraulic cylinder (16) is isolated into a hydraulic pressure cavity and a cavity by the second piston (10), and described rotating shaft piston (13) is movably set in this hydraulic pressure cavity; Be provided with low pressure (LP) cylinder (17), the hydraulic pressure cavity of described the second oil hydraulic cylinder (16) is provided with high pressure entry (14) and low tension outlet (15), pass through pipeline communication between the high pressure entry of this second oil hydraulic cylinder and the pressure pan, the low tension outlet of this second oil hydraulic cylinder and low pressure (LP) cylinder pass through pipeline communication between (17), described rotating shaft piston is provided with a pair of through hole, this is communicated with the hydraulic pressure cavity of through hole with described the second oil hydraulic cylinder (16), only can make when described rotating shaft piston (13) rotates described this to through hole in the through hole and the conducting of one of described high pressure entry and low tension outlet;
Described piezoelectricity converting system comprises piezoelectric stack (11), rectifier bridge and accumulator, the simple harmonic oscillation of the second piston can be to the pressure stress of the accurate simple harmonic oscillation of piezoelectric stack (11) generation in the second oil hydraulic cylinder (16) in the described hydraulic vibrating system, every one deck at piezoelectric stack (11) is drawn upper/lower electrode, and what mutually form series, parallel and series-parallel circuit is electrically connected rectifier bridge and accumulator in the lump successively.
2. piezoelectric sea wave power generation system according to claim 1, it is characterized in that: outside this first oil hydraulic cylinder (6), be provided with steel frame construction (7), first piston (19) steel frame construction (7) that is connected, first and second cable is fixed respectively in the relative both sides of steel frame construction (7).
3. piezoelectric sea wave power generation system according to claim 2, it is characterized in that: connect by pipeline between described the first oil hydraulic cylinder (6) and the low pressure (LP) cylinder (17), and between this pipeline, be provided with the one-way valve that only can make liquid flow to the first oil hydraulic cylinder (6) from low pressure (LP) cylinder (17).
4. piezoelectric sea wave power generation system according to claim 1, it is characterized in that: the structure that the simple harmonic oscillation of the second piston can produce the pressure stress of accurate simple harmonic oscillation to piezoelectric stack (11) in the second oil hydraulic cylinder (16) in the described hydraulic vibrating system is: fix a support (21) at the double-floating drum ship, place piezoelectric stack (11) at this support (21), and make the certain precompression of formation between the second piston (10) and the piezoelectric stack (11).
5. piezoelectric sea wave power generation system according to claim 1, it is characterized in that: described piezoelectric stack (11) is to utilize the direct piezoelectric effect of d33 pattern to come switching energy.
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| CN2010102422495A CN102345552B (en) | 2010-07-30 | 2010-07-30 | Piezoelectric sea wave power generation system |
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| CN2010102422495A CN102345552B (en) | 2010-07-30 | 2010-07-30 | Piezoelectric sea wave power generation system |
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| CN102345552A CN102345552A (en) | 2012-02-08 |
| CN102345552B true CN102345552B (en) | 2013-05-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102797655B (en) * | 2012-08-24 | 2014-02-19 | 昆山攀特电陶科技有限公司 | Automotive piezoelectric shock absorber power generation system |
| CN103199739B (en) * | 2013-03-12 | 2015-10-28 | 张平 | Wave and wind power generation plant |
| CN104314740A (en) * | 2014-10-09 | 2015-01-28 | 长沙理工大学 | Floating type wave energy oxygen supply device utilizing buoyancy pendulum |
| CN104485838B (en) * | 2014-11-04 | 2017-01-18 | 哈尔滨工业大学 | Stack type dielectric elastomer wave energy collector |
| CN105298730B (en) * | 2015-11-10 | 2018-03-16 | 浙江大学 | Utilize the removable aircraft sea landing platform of wave-energy power generation |
| CN107191314B (en) * | 2017-07-25 | 2023-08-04 | 青岛大学 | A marine wave energy power generation device based on piezoelectric effect |
| CN111038649A (en) * | 2019-12-12 | 2020-04-21 | 邹小飞 | Self-flashing type marine warning equipment |
| CN112284355B (en) * | 2020-09-14 | 2022-07-26 | 北京致感致联科技有限公司 | Passive piezoelectric sensor and monitoring system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4341959A (en) * | 1979-04-19 | 1982-07-27 | Kvaerner Brug A/S | Wave energy power station |
| CN1199822A (en) * | 1998-06-03 | 1998-11-25 | 李建卫 | Sea wave power generator |
| CN201794706U (en) * | 2010-07-30 | 2011-04-13 | 昆山攀特电陶科技有限公司 | Piezoelectric wave power generation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04203477A (en) * | 1990-11-30 | 1992-07-24 | Tsunehisa Tsuchiya | Wave activated power generation device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4341959A (en) * | 1979-04-19 | 1982-07-27 | Kvaerner Brug A/S | Wave energy power station |
| CN1199822A (en) * | 1998-06-03 | 1998-11-25 | 李建卫 | Sea wave power generator |
| CN201794706U (en) * | 2010-07-30 | 2011-04-13 | 昆山攀特电陶科技有限公司 | Piezoelectric wave power generation system |
Non-Patent Citations (1)
| Title |
|---|
| JP平4-203477A 1992.07.24 |
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Address after: 215300 development zones in Jiangsu province Kunshan City Road No. 385 Patentee after: SUZHOU PANT PIEZOELECTRIC TECH Co.,Ltd. Address before: 215300 development zones in Jiangsu province Kunshan City Road No. 385 Patentee before: KUNSHAN PANT PIEZOELECTRIC TECH Co.,Ltd. |
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Effective date of registration: 20210226 Address after: 226671 Shuanglou Industrial Park, Qutang Town, Hai'an County, Nantong City, Jiangsu Province (LiuXu Village) Patentee after: JIANGSU JIN SHENGYUAN SPECIAL VALVE LIMITED BY SHARE Co.,Ltd. Address before: 215300 no.385, Kunjia Road, Kunshan Development Zone, Jiangsu Province Patentee before: SUZHOU PANT PIEZOELECTRIC TECH Co.,Ltd. |
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Granted publication date: 20130501 |