CN109470310B - Synchronous observing device for near-shore water body profile wave, flow and sand - Google Patents

Synchronous observing device for near-shore water body profile wave, flow and sand Download PDF

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Publication number
CN109470310B
CN109470310B CN201811484609.5A CN201811484609A CN109470310B CN 109470310 B CN109470310 B CN 109470310B CN 201811484609 A CN201811484609 A CN 201811484609A CN 109470310 B CN109470310 B CN 109470310B
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observation frame
frame body
anchor
observation
seat
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CN109470310A (en
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张文祥
唐明
章啸程
赵中豪
张赛赛
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East China Normal University
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East China Normal University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/30Supports specially adapted for an instrument; Supports specially adapted for a set of instruments

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The invention discloses a near-shore water profile wave, flow and sand synchronous observation device which comprises a main observation frame and detection instruments. The device is not easily affected by environment, is convenient to release and recover by the main measuring frame, has strong anti-interference capability, automatically stores the observed data, facilitates interpretation and analysis of the observed data, and is particularly suitable for observing water bodies in shallow water areas (less than 30 meters) near the shore and at the river mouth under extreme weather conditions.

Description

Synchronous observing device for near-shore water body profile wave, flow and sand
Technical Field
The invention relates to the field of field water body on-site observation technology, is suitable for observing shallow water areas near the shore and river mouth under extreme weather conditions, and in particular relates to a synchronous observation device for cross section waves, flow and sand of a near-shore water body.
Technical Field
The research on the hydrodynamic force, sediment and wave changes in the near-shore and estuary areas has important theoretical value and practical significance for the erosion and the siltation of the estuary coastal underwater topography, the evolution of tidal beaches and the protection of near-shore engineering. The field site is the most important source for acquiring hydrodynamic force, sediment and wave data of an observation site or region, and is also the basis for carrying out intensive research on the data.
The main methods of conventional field observation are ship survey, buoy or anchor system, and under-seat or seabed machine observation. The buoy or the anchor system can observe the flow velocity and the flow direction of the section of the water body and can also obtain the limited turbidity information through a turbidity chain; the base or seabed machine observation system can observe the hydrodynamic force, sediment and flow rate of the bottom boundary layer. The method is difficult to meet the requirements of synchronous on-site observation of water profile hydrodynamic force, suspended sediment and waves.
At present, a buoy is used for fixing a turbidity chain to observe section turbidity, and the section turbidity can be converted into suspended sand concentration information through calibration, so that the method is high in cost, and the field operation difficulty and risk are high. Due to the restriction of the field environment, the water depth of the observation point can change along with the size of the water flow, and the information of the change of the suspended sand concentration of a certain water depth is difficult to accurately observe. The device moving up and down at a certain depth is used for observing the section suspended sand information, the device is mature in the deep ocean section application, but for shallow water of which the offshore distance is less than 30 meters, no observing device for mature application is found at present. In particular, it is important to obtain hydrodynamic information with high space-time resolution and synchronous information of suspended sand concentration change under the condition of strong hydrodynamic force and shallow water depth, especially in the condition of storm surge weather. The conventional seat bottom observation frame, the fixed anchor system observation and the conventional ship survey are difficult to meet the practical requirement of synchronous observation of the surf and the quicksand.
Disclosure of Invention
The invention aims to provide a near-shore water profile wave, flow and sand synchronous observation device aiming at the defects of the prior art, an ADCP acoustic sensor, an ASM profile turbidimeter, an OBS-3A optical back scattering turbidimeter, an SBE-26 tide meter and a plurality of detection instruments are integrated on a main observation frame, the main observation frame is arranged at an observation point, and the detection instrument is used for collecting and storing near-bottom suspended sand concentration profile information, flow velocity and flow direction information, water profile flow velocity and flow direction, suspended sand concentration (acoustic inversion) information and sea surface wave information, so that the observation research and analysis on water dynamics are finally realized, the observation point selection is not influenced by the environment, the main observation frame 1 is convenient to release and recover, the anti-interference capability is strong, the observation data is automatically stored, the interpretation and analysis of the observation data are convenient, and the method is especially suitable for observing the water in the shallow water area near shore and river mouth under extreme weather conditions.
The specific technical scheme for realizing the aim of the invention is as follows:
the synchronous observation device for the cross section waves, the flow and the sand of the offshore water body is characterized by comprising a main observation frame and a detection instrument, wherein the main observation frame consists of an observation frame body, an anchor needle, an anchor system, an acoustic sensor mounting seat and a turbidity rod;
the observation frame body is formed by connecting a small circular ring at the top, a large circular ring at the bottom and four steel pipes at the periphery, wherein three nephelometer supports and a nephelometer rod upper seat are arranged at the periphery of the small circular ring, lifting lugs are arranged at the middle parts of the four steel pipes, a tide gauge seat is arranged between two adjacent steel pipes, and three anchor needle seats, four anchor system hinge seats and a nephelometer rod lower seat are arranged along the periphery of the large circular ring; the acoustic sensor mounting seat is rectangular box-shaped, four steel ropes are arranged at four corners of the acoustic sensor mounting seat, the acoustic sensor mounting seat is arranged in the observation frame body, and the four steel ropes are respectively connected with lifting lugs on steel pipes of the observation frame body; the turbidity rod is a rod piece and is vertically arranged in the observation frame body, and two ends of the turbidity rod are respectively connected with an upper turbidity rod seat and a lower turbidity rod seat of the observation frame body; the three anchor needles are vertically downwards arranged on the anchor needle seat of the large ring of the observation frame body, four anchor systems are arranged on the anchor systems, retractable anchor cables are arranged on the anchor systems, and the anchor systems are hinged with the anchor system hinged seat of the large ring of the observation frame body through the anchor cables;
the detection instrument is composed of an ADCP acoustic sensor, an ASM profile turbidimeter, an OBS-3A optical back scattering turbidimeter, an SBE-26 wave hygrometer and a sub-gram. The ADCP acoustic sensor is arranged in an acoustic sensor mounting seat of the observation frame body, the ASM section nephelometer is arranged on a nephelometer rod of the observation frame body, the OBS-3A optical backward scattering nephelometer is three, the ADCP acoustic sensor is respectively arranged on three scattering nephelometer brackets of a small ring on the observation frame body, the SBE-26 wave hygrometer is arranged on a wave hygrometer seat of the observation frame body, and the sub-force gram is arranged on a sub-force gram seat of the observation frame body.
The invention integrates an ADCP acoustic sensor, an ASM profile turbidimeter, an OBS-3A optical back scattering turbidimeter, an SBE-26 wave hygrometer and a plurality of detection instruments on a main detection frame, a main observation frame is applied to an observation point, near-bottom suspended sand concentration profile information and near-bottom flow velocity and flow direction information are acquired and stored through the detection instruments, and water profile flow velocity, flow direction, suspended sand concentration and sea surface wave information are acquired and stored, so that the dynamic observation research and analysis of a water body are finally realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the observation position of the main frame application;
FIG. 3 is a diagram of the change in attitude parameters of the main observation frame;
FIG. 4 is a graph of the effective wave height variation obtained by pressure wave hygrometer SBE-26.
Detailed Description
Referring to fig. 1, the invention comprises a main observation frame 1 and a detecting instrument 2, wherein the main observation frame 1 is composed of an observation frame body 11, an anchor needle 12, an anchor system 13, an acoustic sensor mounting seat 14 and a turbidity rod 15. The observation frame body 11 is formed by connecting a small circular ring at the top, a large circular ring at the bottom and four steel pipes at the periphery, wherein three nephelometer supports and a nephelometer rod upper seat are arranged at the periphery of the small circular ring, lifting lugs 16 are arranged at the middle parts of the four steel pipes, a wave hygrometer seat is arranged between two adjacent steel pipes, three anchor needle seats, four anchor hinge seats and a nephelometer rod lower seat are arranged along the periphery of the large circular ring, the acoustic sensor mounting seat 14 is in a rectangular box shape, four steel ropes are arranged at four corners of the acoustic sensor mounting seat, the acoustic sensor mounting seat 14 is arranged in the observation frame body 11, and the four steel ropes are respectively connected with the lifting lugs 16 on the steel pipes of the observation frame body 11; the turbidity rod 15 is a rod piece and is vertically arranged in the observation frame body 11, and two ends of the turbidity rod are respectively connected with an upper seat and a lower seat of the observation frame body 11; the anchor needle 12 is three pieces, the anchor needle 12 is vertically and downwards arranged on an anchor needle seat of the large ring of the observation frame body 11, the anchor system 13 is four pieces, the anchor system 13 is provided with a retractable anchor cable, and the anchor system 13 is hinged with an anchor system hinged seat of the large ring of the observation frame body 11 through the anchor cable.
Referring to FIG. 1, the detection instrument 2 is composed of an ADCP acoustic sensor 21, an ASM profile turbidimeter 22, an OBS-3A optical back-scattering turbidimeter 23, an SBE-26 Langchao meter 24, and a sub-gram 25. The ADCP acoustic sensor 21 is arranged in the acoustic sensor mounting seat 14 of the observation frame 11, the ASM section nephelometer 22 is arranged on the nephelometer rod 15 of the observation frame 11, the OBS-3A optical back scattering nephelometer 23 is three pieces and is respectively arranged on the three scattering nephelometer brackets 17 of the small circular ring on the observation frame 11, and the SBE-26 tide meter 24 is arranged on the tide meter seat 18 of the observation frame 11. The sub-force gram 25 is arranged on the sub-force gram seat 19 of the observation frame body 11.
Examples
The invention is suitable for observing the water body in shallow water areas near the shore and the estuary under extreme weather conditions, wherein the observation information comprises water body profile flow velocity, flow direction information and suspended sand concentration information, near-bottom suspended sand concentration profile information, near-bottom flow velocity flow direction information sea surface and sea surface wave information, and comprises the following observation steps:
1) Setting of observation information
The observation information comprises water section flow velocity, flow direction, sea surface wave information, suspended sand concentration, near-bottom suspended sand concentration section information and near-bottom flow velocity flow direction information;
2) Combination and installation of instruments
Referring to fig. 1, the detecting instrument 2 is composed of an ADCP acoustic sensor 21, an ASM section turbidimeter 22, an OBS-3A optical back-scattering turbidimeter 23, an SBE-26 wave hygrometer 24 and a sub-power gram 25, wherein the ADCP acoustic sensor 21 is arranged in the acoustic sensor mounting seat 14 of the observing rack 11, the ASM section turbidimeter 22 is arranged on the turbidity rod 15 of the observing rack 11, the OBS-3A optical back-scattering turbidimeter 23 is three pieces and is respectively arranged on the three scattering turbidimeter supports 17 of the small circular ring on the observing rack 11, and the SBE-26 wave hygrometer 24 is arranged on the wave hygrometer seat 18 of the observing rack 11. The sub-force gram 25 is arranged on the sub-force gram seat 19 of the observation frame body 11;
3) Preparation of the application of the device
Referring to fig. 1, determining an observation site of a device, and ascertaining relevant information of water depth, hydrodynamic force, substrate and underwater topography of the observation site; preparing a survey ship, a buoy and a cable, connecting the buoy with a main survey frame 1 by the cable, connecting the survey ship with the main survey frame 1, hoisting the main survey frame 1 to the survey ship by a crane on the survey ship, and driving the survey ship to an observation site;
4) Application process of main measuring frame
Referring to fig. 1, reaching an observation site, lifting a main observation frame 1 by using a crane on a survey vessel, rotating to the outer side of a chord, slowly placing on the water surface, standing for a moment, finally checking the setting positions of all detection instruments 2, setting the setting positions of an ADCP acoustic sensor 21 and an acoustic sensor mounting seat 14, adjusting the vertical state of the main observation frame 1, slowly lowering a main observation frame system 1 by using the crane after the checking is completed, enabling three anchor needles 12 to touch the water bottom, enabling four anchor systems 13 to touch the water bottom in sequence until the main observation frame 1 is placed on the water bottom, finally tightening anchor cables on the anchor systems 13, at the moment, releasing the crane, unlocking cables connected with the main observation frame 1 by the survey vessel, floating on the water surface by using buoys connected with the cables of the main observation frame 1, and driving back the survey vessel, thereby completing the application of the main observation frame 1;
5) Acquisition and storage of detection information
The main observation frame 1 is placed at an observation point for several days, and the ADCP acoustic sensor 21, the ASM section turbidimeter 22, the OBS-3A optical back scattering turbidimeter 23, the SBE-26 tide meter 24 and the sub-power gram 25 respectively collect and store detection data of a water area;
6) Recovery process of main measuring frame
When the observation time is finished, the main observation frame 1 is recovered, firstly, a ship to be measured is driven to an observation site, a crane is used for connecting a buoy on the sea surface which is connected with the main observation frame 1, the crane for the ship is started, the crane is slowly lifted, the main observation frame 1 is recovered, and meanwhile, the buoy is recovered;
7) Processing and analysis of collected data
7.1, the ADCP acoustic sensor 21 can obtain the information of the water section flow velocity, the flow direction, the acoustic backscattering of different water layers and the like according to the acoustic Doppler principle;
7.2, the SBE-26 wave hygrometer 24 can obtain sea surface wave change data through continuous pressure sampling, wherein the sea surface wave change data comprise average wave height, effective wave height, maximum wave height, average wave energy density and average water depth, so that the purpose of measuring wave parameters can be achieved;
7.3, the OBS-3A optical back scattering turbidimeter 23 converts the scattering amount of the received infrared radiation light into a turbidity value, so as to monitor suspended substances, a correlation model of water turbidity and suspended sand concentration is established through a synchronous suspended sand water sample obtained on site, and the acquired turbidity information is converted into sediment concentration through calculation through the established model, so that suspended sand concentration information of an observation point is obtained;
7.4, an ASM profile turbidimeter is similar to the principle of 3, and near-bottom suspended sand concentration profile information can be obtained;
7.5, the secondary force gram 25 is provided with a two-dimensional electromagnetic flow rate sensor, a water temperature sensor and a flow direction sensor, and can be used for measuring the speed, the direction and the water temperature of ocean currents for a long time; because the secondary force gram 25 is also provided with a two-dimensional spherical electromagnetic sensor and a high-sensitivity Hall compass, the secondary force gram can ensure that the small flow of the water body is measured and the vector value of the average flow velocity near the bottom is read.
Application cases: submarine observation frame power sediment observation experiment
Experimental background
The typhoon moraxel pedicel was grown on the pacific ocean surface in the northwest at day 14, 9, 10, 2016. Logging in Xiamen city of Fujian province in China with a strong wind level in 9 months and 15 days, wherein the maximum wind force is 48m/s at the center during logging in; typhoon malerka was generated in pacific northwest at 8 am at 13 a 9 th of 2016 and logged in ninety japan at 20 a 9 th.
Experimental area
Referring to fig. 2, the Yangtze river mouth Chong Ming and Donghai region seashore I station (122.4380983 degrees E/31.40104167 degrees N). Experimental time
2016 9-20
Purpose of experiment
The purpose 1 is that whether the synchronous observing device for the cross section waves, the flow and the sand of the water body on the near shore can normally operate in extreme weather or not;
and 2, synchronously obtaining hydrodynamic force, sediment, wave and suspended sand concentration change information in an offshore shallow water area by using the device.
Experimental procedure
1) And (3) installing and debugging: referring to fig. 1, the survey vessel was launched from the south-sink major river company location to the harbour dock at 9/9 of 2016, and the sea taker and the instrument were launched for installation and debugging of the instrument and equipment. An ADCP acoustic sensor 21 is arranged in an acoustic sensor mounting seat 14 of an observation frame 11, an ASM profile turbidimeter 22 is arranged on a turbidimeter rod 15 of the observation frame 11, an OBS-3A optical back scattering turbidimeter 23 is three, and is respectively arranged on three scattering turbidimeter brackets of a small circular ring on the observation frame 11, and an SBE-26 tide meter 24 is arranged on a tide meter seat of the observation frame 11; the sub-force g is suspended with a rope on a cross bar between two vertical steel pipes. Debugging before water entering is carried out after the combined installation of the instruments, so that all the instruments are ensured to work normally;
2) And (3) a main measuring frame applying process: the method comprises the steps that a measuring ship is started to a measuring area in the morning of 9 th and 10 th of 2016, under the condition that relevant personnel find relevant information of water depth, hydrodynamic force, substrate and underwater topography of an observation site, a main observation frame 1 is lifted by a crane on the measuring ship, the crane is rotated to the outer side of a ship chord, the main observation frame 1 is slowly placed on the water surface, a moment is kept still, the setting positions of all detection instruments 2 are finally checked, the setting positions of an ADCP acoustic sensor 21 and an acoustic sensor mounting seat 14 are finally checked, the vertical state of the main observation frame 1 is adjusted, after the checking is completed, the crane slowly lowers the main observation frame system 1, three anchor needles 12 touch the water bottom, four anchor systems 13 touch the water bottom in sequence until the main observation frame 1 is placed on the water bottom, finally anchor cables on the anchor systems 13 are tightened, at the moment, the crane is released, a cable connected with the main observation frame 1 is released, a buoy connected with the cable is floated on the water surface, the measuring ship is driven back, and the main observation frame 1 is finished;
3) And (3) a recovery process: and after the measurement task is finished, the main observation frame 1 is recovered in the year 2016, 9 and 20. Firstly, when a ship to be tested arrives at an observation site, a buoy of a main observation frame is recovered, a ship-borne anchor starting system is utilized to slowly lift the main observation frame system 1 out of the water surface, and then a ship-borne crane is utilized to place the observation frame on the ship to be tested. After the main observation frame is taken out, the small anchor under the auxiliary buoy is also taken out from the water surface through the anchor chain of the main observation frame. Finally, unloading related instruments from the observation frame system 1 successively;
4) Experimental data processing and analysis: the measuring ship is semi-ashore at four afternoon in 2016, 9 and 20, then the instrument is moved back to the unit through land traffic, and the related instrument is communicated and data are exported in the later period, so that data processing and analysis are carried out. The ADCP acoustic sensor obtains the information such as the water section flow velocity, the water flow direction and the like through Winriver II software; OBS-3A obtains suspension sand concentration information of a near-bottom point by using a suspension sand water sample collected on site for calibration; the pressure wave tide meter SBE-26 obtains wave values of a measuring area through Sea soft for waves special software, wherein the wave values comprise average wave height, effective wave height, maximum wave height, average wave energy density and average water depth; sub-power is used for obtaining near-bottom flow velocity and flow direction information; the ASM profile turbidimeter obtains profile information of near-bottom suspended sand concentration by calibrating a suspended sand water sample collected by a site survey ship. And calibrating and attenuation compensating acoustic scattering intensities of different water layers obtained by the acoustic sensor by using a ship testing water sample and an existing model algorithm, so as to obtain suspended sand concentration information of the water body profile.
Experimental results
Results 1, referring to fig. 3, the attitude parameter change results of the main observation frame are obtained in the ship motion state in the experimental time (under storm surge condition) by the adcp: the typhoons pass through the environment twice, and the rolling and pitching are less than 5 degrees; the maximum yaw is less than 10 degrees. As the device is provided with the universal joint, normal observation data can be obtained within 15 degrees of inclination. It is therefore known that: the device for observing the hydrodynamic sediment wave of the water body profile can be used for operating well under the extreme weather condition.
Results 2, referring to fig. 4, the effective wave height change obtained by the wave tide meter SBE-26, the results show that: the effective wave height value change range of the experimental area is 0.2-5.8m, the effective wave height value gradually increases along with the approach of double typhoons and reaches the maximum value of 5.8m at about 13 points on day 17 of 9 months, which proves that the instrument in the hydrodynamic sediment wave observation device for the water body profile can obtain good wave data under extreme weather conditions.

Claims (1)

1. The synchronous observation device for the cross section waves, the flow and the sand of the near-shore water body is characterized by comprising a main observation frame (1) and a detection instrument (2), wherein the main observation frame (1) consists of an observation frame body (11), an anchor needle (12), an anchor system (13), an acoustic sensor mounting seat (14) and a turbidity rod (15); the observation frame body (11) is formed by connecting a small circular ring at the top, a large circular ring at the bottom and four steel pipes at the periphery, wherein three nephelometer supports and a nephelometer rod upper seat are arranged at the periphery of the small circular ring, lifting lugs (16) are arranged at the middle parts of the four steel pipes, a hygrometer seat is arranged between two adjacent steel pipes, and three anchor needle seats, four anchor hinge seats and a nephelmachine lower seat are arranged along the periphery of the large circular ring;
the acoustic sensor mounting seat (14) is rectangular box-shaped, four steel ropes are arranged at four corners of the acoustic sensor mounting seat, the acoustic sensor mounting seat (14) is arranged in the observation frame body (11), and the four steel ropes are respectively connected with lifting lugs (16) on steel pipes of the observation frame body (11); the turbidity rod (15) is a rod piece and is vertically arranged in the observation frame body (11), and two ends of the turbidity rod are respectively connected with an upper seat and a lower seat of the observation frame body (11); the anchor needle (12) is three, the anchor needle (12) is vertically downwards arranged on the anchor needle seat of the large ring of the observation frame body (11), four anchor systems (13) are arranged, the anchor system (13) is provided with retractable anchor cables, and the anchor system (13) is hinged with the anchor system hinged seat of the large ring of the observation frame body (11) through the anchor cables;
the detection instrument (2) is composed of an ADCP acoustic sensor (21), an ASM profile turbidimeter (22), an OBS-3A optical back scattering turbidimeter (23), an SBE-26 wave hygrometer (24) and a sub-gram (25); the ADCP acoustic sensor (21) is arranged in an acoustic sensor mounting seat (14) of the observation frame body (11), the ASM section nephelometer (22) is arranged on a nephelometer rod (15) of the observation frame body (11), the OBS-3A optical backward scattering nephelometer (23) is three, and is respectively arranged on three nephelometer brackets (17) of a small ring on the observation frame body (11), and the SBE-26 wave hygrometer (24) is arranged on a wave hygrometer seat (18) of the observation frame body (11); the sub-force gram (25) is arranged on a sub-force gram seat (19) of the observation frame body (11);
the secondary force sensor (25) is provided with a two-dimensional electromagnetic flow rate sensor, a water temperature sensor and a flow direction sensor, and is used for measuring the speed, the direction and the water temperature of ocean currents for a long time; the secondary force gram (25) is also provided with a two-dimensional spherical electromagnetic sensor and a high-sensitivity Hall compass, so that the measurement of the tiny flow of the water body and the reading of the vector value of the near-bottom average flow velocity can be ensured.
CN201811484609.5A 2018-12-06 2018-12-06 Synchronous observing device for near-shore water body profile wave, flow and sand Active CN109470310B (en)

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CN101533035A (en) * 2009-04-02 2009-09-16 华东师范大学 Method for observing estuary seacoast near-bottom water and sediment under high turbidity environment
CN106932018A (en) * 2017-03-16 2017-07-07 天津水运工程勘察设计院 A kind of ocean caisson bottom-sitting type measurement apparatus
CN107063770A (en) * 2017-03-21 2017-08-18 上海河口海岸科学研究中心 A kind of nearly bottom multilayer in sublittoral region region based on transmission-light turbidity instrument control hangs the acquisition method and its device of sand-like product
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