CN114017244A - Self-powered sensor for measuring ocean surface waves - Google Patents
Self-powered sensor for measuring ocean surface waves Download PDFInfo
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- CN114017244A CN114017244A CN202111115045.XA CN202111115045A CN114017244A CN 114017244 A CN114017244 A CN 114017244A CN 202111115045 A CN202111115045 A CN 202111115045A CN 114017244 A CN114017244 A CN 114017244A
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- 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
- F03B13/1805—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 hinged to the rem
- F03B13/181—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 hinged to the rem for limited rotation
- F03B13/1815—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 hinged to the rem for limited rotation with an up-and-down movement
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- 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
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/02—Casings
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
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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
- Y02E10/20—Hydro energy
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Hydrology & Water Resources (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention is used for measuring the wave period, frequency and wave height on the ocean surface, belongs to the field of geological drilling and instruments and meters, and particularly relates to a self-powered sensor for measuring ocean surface waves. The self-powered sensor comprises a shell, wherein the first induction electrode unit is of a cylindrical structure, is coaxially arranged in the shell and can slide along the axial direction of the supporting part, and a floating ball is arranged at the upper end of the first induction electrode unit; the second induction electrode unit is arranged on the inner wall of the supporting part and is connected with the first induction electrode unit; the friction electrode unit is arranged on the outer side of the first induction electrode unit; the third induction electrode units are of arc-shaped structures and are provided with a plurality of induction electrode units, and the third induction electrode units are horizontally arranged in the shell and are uniformly distributed at intervals from top to bottom; the fourth sensing unit is arranged at the lower end of the first sensing electrode unit, and a gap is formed between the fourth sensing unit and the third sensing electrode.
Description
Technical Field
The invention is used for measuring the wave period, frequency and wave height on the ocean surface, belongs to the field of geological drilling and instruments and meters, and particularly relates to a self-powered sensor for measuring ocean surface waves.
Background
The guarantee of the undisrupted ocean forecast of activities such as ocean resource exploration and development, ocean traffic, ocean fishery and the like can be realized, and the ocean forecast can not be continuously, accurately and timely for the live data on the ocean. In recent years, ocean disasters such as typhoons, storm tides, disastrous sea waves, sea ice, red tides and the like frequently occur, and accurate forecast and early warning of the ocean disasters are required to prevent and reduce the ocean disasters in advance.
Waves are an important element of ocean monitoring. The high-precision wave information plays an important role in the fields of navigation safety, meteorological transformation, marine disaster prediction, mineral mining, energy development and the like. At present, radar remote sensing, photoelectric remote sensing, satellite remote sensing, laser type wave measurement methods and the like have high accuracy, but the methods monitor sea wave frequency spectrum by using recursive inversion and Fourier transform of signals, the signals are seriously distorted, and the problems are serious,
in addition to this, these sensors require an external power source to provide energy, making them monitor the frequency spectrum of the waves, greatly affecting the service life. In the prior art, the service life of a storage battery is limited, and the size of the storage battery is large, so that the whole size of the sensor is large. In addition, to ensure the normal use of the wave sensor in the buoy, the storage battery is replaced and maintained periodically, which prevents the sensor buoy from being continuously powered and consequently collecting wave parameters for a long time.
The concept of triboelectric nanogenerators (TENG) was first proposed in 2012 by wangzhining yards. Due to its low cost, lightness, high sensitivity and high low frequency efficiency, it is widely used in energy collection and self-powered sensing. For example, in the field of sensors, acceleration sensors, flow sensors, skin touch sensors, vibration sensors, humidity sensors and the like are developed; in the field of energy collection, wind energy, rain energy, water wave energy, sound wave energy and human body movement energy are collected.
Disclosure of Invention
In view of the above, the present invention provides a self-powered sensor for measuring ocean surface waves.
The invention provides a self-powered sensor for measuring ocean surface waves, which comprises a shell, a first induction electrode unit, a second induction electrode unit, a friction electrode unit, a third induction electrode unit and a fourth induction electrode unit, wherein the shell is provided with a first end and a second end;
the shell is of a hollow cylindrical structure, the upper end of the shell is provided with a cylindrical supporting part, and the inside of the supporting part is communicated with the inside of the shell;
the first induction electrode unit is of a cylindrical structure and is coaxially arranged in the shell, the upper end of the first induction electrode unit penetrates through the supporting part to extend out of the shell and can slide along the axial direction of the supporting part, and a floating ball is arranged at the upper end of the first induction electrode unit;
the second induction electrode unit is arranged on the inner wall of the supporting part and is connected with the first induction electrode unit;
the friction electrode unit is arranged on the outer side of the first induction electrode unit;
the third induction electrode units are of arc-shaped structures and are provided with a plurality of induction electrode units, and the third induction electrode units are horizontally arranged in the shell, are fixedly connected with the inner wall of the shell and are uniformly distributed at intervals from top to bottom;
the fourth sensing unit is arranged at the lower end of the first sensing electrode unit, and a gap is formed between the fourth sensing unit and the third sensing electrode.
The self-powered sensor for measuring ocean surface waves of claim 1, wherein the lower end of the housing is an open structure and the lower end of the housing is provided with an end cap, and the end cap is detachably connected with the housing.
The self-powered sensor for measuring sea surface waves of claim 1, said first sensing electrode unit being made of aluminum material.
The self-powered sensor for measuring sea surface waves of claim 1, the second sensing electrode unit being a tubular aluminum foil coaxially disposed on an inner wall of an upper portion of the support.
The self-powered sensor for measuring ocean surface waves of claim 1, wherein the friction electrode element is a teflon film wrapped around the outside of the upper portion of the one sensing electrode element.
A self-powered sensor for measuring sea surface waves according to claim 1, said third sensing electrode unit being made of aluminium foil, provided with six, said six third sensing electrode units having arc degrees corresponding to 60 °, 120 °, 180 °, 240 °, 300 ° and 360 ° from top to bottom.
A self-powered sensor for measuring sea surface waves as defined in claim 1, wherein said first sensing electrode unit is coaxially provided at a lower end thereof with a disc, and said fourth sensing electrode unit is wrapped outside said disc.
The self-powered sensor for measuring ocean surface waves of claim 7, said fourth sensing electrode unit being a polytetrafluoroethylene film.
The self-powered sensor for measuring sea surface waves of claim 1, wherein the gap between said fourth sensing electrode unit and each said third sensing electrode is 0.5 mm.
The technical scheme provided by the invention has the beneficial effects that: the self-powered sensor for measuring ocean surface waves has the following advantages:
1. the self-powered sensor adopts a horizontal sliding mode in a working mode of a friction nano generator, low-frequency energy on the surface of the ocean is collected to provide a power supply for the sensor, and the generating capacity of TENG completely meets the normal use of the sensor, so that the self-power of the sensor is realized;
2. the traditional sensor is complex to manufacture and needs to be matched with a data collector, so that the volume of the buoy is large;
3. the friction of the inner wall is converted into an induction type, so that the abrasion is reduced, and the service life and the reliability are effectively improved;
4. the wave height (H), period (T) and frequency (f) elements of the sea waves are measured with high precision, and a high-precision sea wave frequency spectrum is obtained.
Drawings
FIG. 1 is a schematic diagram of the self-powered sensor of the present invention for measuring ocean surface waves;
fig. 2 is a sectional view taken along line a-a of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1-2, an embodiment of the present invention provides a self-powered sensor for measuring ocean surface waves, comprising a housing 7, a first sensing electrode unit 5, a second sensing electrode unit 3, a friction electrode unit 2, a third sensing electrode unit 4 and a fourth sensing electrode unit 6;
the shell 7 is a hollow cylindrical structure, the upper end of the shell is provided with a cylindrical supporting part 11, and the inside of the supporting part 11 is communicated with the inside of the shell 7;
the first induction electrode unit 5 is of a cylindrical structure, is coaxially arranged in the shell 7, has an upper end penetrating through the supporting part 11 and extending out of the shell 7, and can slide along the axial direction of the supporting part 11, and a floating ball 1 is arranged at the upper end of the first induction electrode unit 5;
the second sensing electrode unit 3 is arranged on the inner wall of the supporting part 11 and is connected with the first sensing electrode unit 5;
the friction electrode unit 2 is arranged at the outer side of the first induction electrode unit 5;
the third induction electrode units 4 are arc-shaped structures and are provided with a plurality of third induction electrode units 4, and the third induction electrode units 4 are horizontally arranged in the shell 7, fixedly connected with the inner wall of the shell 7 and uniformly distributed at intervals from top to bottom;
the fourth sensing electrode unit 6 is disposed at the lower end of the first sensing electrode unit 5 with a gap therebetween.
In the present invention, the lower end of the housing 7 is fixed on the ocean platform by the bolt 10, and the support part 11 is integrally formed with the upper end of the housing 7, which provides an installation space for the second sensing electrode unit 3 and ensures the moving track of the first sensing electrode unit 5. The floating ball 1 is a Foam buoy ball and is used for driving the first sensing electrode unit 5 to slide up and down under the action of external force. First response electrode unit 5, friction electrode unit 2 and second response electrode unit 3 constitute from the sensing portion of power supply sensor, and first response electrode unit 5 and second response electrode unit 3 are direct to be connected through the wire to external singlechip gathers the signal of telecommunication, and the size of second response electrode unit 3 is unanimous with the size of friction electrode unit 2. Third inductive electrode unit 4 and fourth inductive electrode unit 6 constitute from power supply sensor's the portion of generating electricity, and is specific, and third inductive electrode unit 4 is equipped with 6, and 6 third inductive electrode units 4 all external singlechip. Specifically, the gap between the fourth sensing electrode unit 6 and each of the third sensing electrodes is 0.5 mm.
In the above embodiment, the lower end of the housing 7 is an open structure, the lower end of the housing is provided with an end cover 9, and the end cover 9 is detachably connected with the housing 7.
In the invention, the shell 7 with the open structure is convenient for maintaining the induction electrode unit in the shell 7, and the end cover 9 is fixedly connected with the shell 7 through screws, so that the assembly and disassembly are convenient.
In the above embodiment, the first sensing electrode unit 5 is made of an aluminum material.
In the above embodiment, the second sensing electrode unit 3 is a tubular aluminum foil, which is coaxially disposed on the inner wall of the upper portion of the supporting portion 11.
In the invention, the tubular aluminum foil has stronger electron-gaining capability.
In the above embodiment, the third sensing electrode unit 4 is made of an aluminum foil material, and the radians of the third sensing electrode unit 4 are 60 °, 120 °, 180 °, 240 °, 300 ° and 360 ° from top to bottom.
In the invention, the radians of the third sensing electrode units 4 are different, and the generated area of each third sensing electrode unit 4 is different, so that the sensed electric charge quantity is different, the generated electric signals are different, and the detection precision can be improved.
In the above embodiment, the lower end of the first sensing electrode unit 5 is coaxially provided with the disc 51, and the outer side of the disc is wrapped with the fourth sensing electrode unit 6.
In the present invention, the disc 51 and the first sensing electrode unit 5 are integrally formed and made of aluminum. The disc 51 can drive the fourth sensing electrode unit 6 to move up and down, so that the purpose of reducing the material consumption of the fourth sensing electrode unit 6 can be achieved, and the cost is reduced.
In the above embodiment, the fourth sensing electrode unit 6 is a teflon film.
In the invention, the electron losing capability of the polytetrafluoroethylene film is stronger.
In the above embodiment, the rubbing electrode unit 2 is a teflon film, which is wrapped on the outer side of the upper part of the first sensing electrode unit 5.
The working principle of the self-powered sensor is as follows: the second induction electrode units 3 are connected through the first induction electrode units 5 to form the friction nanometer power generation device. In the working process, the Foam buoy ball positioned on the ocean surface is connected with the first induction electrode unit 5 to move up and down along with the up-and-down fluctuation of the ocean waves. The friction electrode unit 2 attached to the first sensing electrode unit 5 and the second sensing electrode unit 3 slide up and down in a friction manner, and positive charges are transferred along a lead to form current. In addition, the current output performance is determined by the distance of the up and down movement of the rubbing electrode unit 2. Therefore, the electric signal output by the friction nano generator is collected by the single chip microcomputer, and the parameter of the sea wave height can be measured by identification, so that the sea wave height is measured.
The fourth sensing electrode unit 6 moves up and down along with the up-and-down fluctuation of the sea wave under the driving of the disc 51, and forms an independent layer mode in four working modes of the friction nano generator with the third sensing electrode unit 4, because the third sensing electrode unit 4 is connected with the port of the single chip microcomputer, and the generated area of each layer of the third sensing electrode unit 4 is different in size, the sensed electric charge amount is different in size, and the generated electric signal is different in size. The electric signals are input into the single chip microcomputer, the single chip microcomputer identifies all the collected electric signals, so that the time difference from the first appearance of the electric signals to the last disappearance of the electric signals is the periodic parameter of the waves, and the frequency of the waves can be measured through the formula relation between the frequency and the period.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The self-powered sensor is used for measuring ocean surface waves and is characterized by comprising a shell, a first induction electrode unit, a second induction electrode unit, a friction electrode unit, a third induction electrode unit and a fourth induction electrode unit;
the shell is of a hollow cylindrical structure, the upper end of the shell is provided with a cylindrical supporting part, and the inside of the supporting part is communicated with the inside of the shell;
the first induction electrode unit is of a cylindrical structure and is coaxially arranged in the shell, the upper end of the first induction electrode unit penetrates through the supporting part to extend out of the shell and can slide along the axial direction of the supporting part, and a floating ball is arranged at the upper end of the first induction electrode unit;
the second induction electrode unit is arranged on the inner wall of the supporting part and is connected with the first induction electrode unit;
the friction electrode unit is arranged on the outer side of the first induction electrode unit;
the third induction electrode units are of arc-shaped structures and are provided with a plurality of induction electrode units, and the third induction electrode units are horizontally arranged in the shell, are fixedly connected with the inner wall of the shell and are uniformly distributed at intervals from top to bottom;
the fourth sensing unit is arranged at the lower end of the first sensing electrode unit, and a gap is formed between the fourth sensing unit and the third sensing electrode.
2. The self-powered sensor for measuring sea surface waves of claim 1, wherein the lower end of the housing is open structure and has an end cap at the lower end, the end cap being removably connected to the housing.
3. The self-powered sensor for measuring sea surface waves of claim 1, wherein the first sensing electrode unit is made of an aluminum material.
4. The self-powered sensor for measuring sea surface waves of claim 1, wherein the second sensing electrode unit is a tubular aluminum foil coaxially disposed on the inner wall of the upper portion of the support.
5. The self-powered sensor for measuring ocean surface waves of claim 1 wherein the friction electrode element is a teflon membrane wrapped around the outside of the upper portion of the one sensing electrode element.
6. The self-powered sensor for measuring ocean surface waves as defined in claim 1, wherein said third sensing electrode unit is made of aluminum foil, and has six, and the radian of six of said third sensing electrode units is 60 °, 120 °, 180 °, 240 °, 300 ° and 360 ° from top to bottom.
7. The self-powered sensor for measuring ocean surface waves of claim 1, wherein the lower end of the first inductive electrode unit is coaxially provided with a disc, and the outer side of the disc is wrapped with the fourth inductive electrode unit.
8. The self-powered sensor for measuring ocean surface waves of claim 7 wherein the fourth sensing electrode unit is a polytetrafluoroethylene film.
9. The self-powered sensor for measuring ocean surface waves of claim 1, wherein the gap between said fourth inductive electrode unit and each of said third inductive electrodes is 0.5 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111115045.XA CN114017244B (en) | 2021-09-23 | 2021-09-23 | Self-powered sensor for measuring ocean surface waves |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111115045.XA CN114017244B (en) | 2021-09-23 | 2021-09-23 | Self-powered sensor for measuring ocean surface waves |
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| CN114017244A true CN114017244A (en) | 2022-02-08 |
| CN114017244B CN114017244B (en) | 2023-03-28 |
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Citations (6)
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|---|---|---|---|---|
| CN208046481U (en) * | 2018-05-03 | 2018-11-02 | 淮北师范大学 | A kind of multi-electrode triboelectricity device |
| US20190131889A1 (en) * | 2016-03-14 | 2019-05-02 | Universidade Do Porto | Triboelectric turbine for generating electricity from the motion of fluids |
| CN111307120A (en) * | 2019-07-22 | 2020-06-19 | 北京纳米能源与系统研究所 | Sensor, ocean wave spectrum measuring system and measuring method thereof |
| CN112814829A (en) * | 2021-01-25 | 2021-05-18 | 中山大学 | Point absorption type wave energy power generation device |
| CN112924014A (en) * | 2021-01-29 | 2021-06-08 | 中国地质大学（武汉） | Self-powered downhole drilling tool vibration sensor based on friction nanometer generator |
| CN113124837A (en) * | 2021-03-10 | 2021-07-16 | 中国地质大学（武汉） | Self-powered sensor for measuring wave parameters |
-
2021
- 2021-09-23 CN CN202111115045.XA patent/CN114017244B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190131889A1 (en) * | 2016-03-14 | 2019-05-02 | Universidade Do Porto | Triboelectric turbine for generating electricity from the motion of fluids |
| CN208046481U (en) * | 2018-05-03 | 2018-11-02 | 淮北师范大学 | A kind of multi-electrode triboelectricity device |
| CN111307120A (en) * | 2019-07-22 | 2020-06-19 | 北京纳米能源与系统研究所 | Sensor, ocean wave spectrum measuring system and measuring method thereof |
| CN112814829A (en) * | 2021-01-25 | 2021-05-18 | 中山大学 | Point absorption type wave energy power generation device |
| CN112924014A (en) * | 2021-01-29 | 2021-06-08 | 中国地质大学（武汉） | Self-powered downhole drilling tool vibration sensor based on friction nanometer generator |
| CN113124837A (en) * | 2021-03-10 | 2021-07-16 | 中国地质大学（武汉） | Self-powered sensor for measuring wave parameters |
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