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43 results about "Sand wave" patented technology
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A sand wave is a lower regime sedimentary structure that forms across from tidal currents. Formation. Sand waves are formed through the action of the wind or water (through waves or tidal currents). Sand waves form also underwater. See also. Sand dune; References. External links. Media related to Sand ...
Apparatus and method for in-situ real-time observation of submarine sand waves
ActiveCN107631720ARealize in-situ real-time observationDocument the migration processOpen water surveyOcean bottomGrating
The invention relates to an apparatus and method for the in-situ real-time observation of submarine sand waves. The apparatus includes an observation system and auxiliary devices. The auxiliary devices comprise an auxiliary ship and a hoisting device; the observation system includes a gravity anchor, a fiber grating floating earth weight sensor, a Kevlar cable, an underwater acoustic releaser group, a lower floating ball bracket, a wave and tide gauge, an upper floating ball bracket, an MRU three-dimensional attitude sensor, a satellite communication machine, an imaging sonar, a solar cell anda main floating body. The principle of the apparatus and the method is characterized in that submarine pressure change caused by the migration of the submarine sand waves is observed, the time interval, elevation and wavelength data of two adjacent extreme submarine pressures are analyzed, and the migration rate of the submarine sand waves is calculated. The method includes the following steps: selection of an observation point and a deployment time, system deployment, recovery, and data processing. The apparatus and the method provide a new idea for the in-situ real-time observation of the submarine sand waves, have the characteristics of simple and easy device, long in-situ real-time measurement period and wide applicable water range, and can realize the in-situ real-time long-term observation of the migration of the submarine sand waves.
Owner:OCEAN UNIV OF CHINA
Shallow sea sand wave area multi-beam sounding terrain reconstruction method based on remote sensing image features
The invention provides a novel shallow sea sand wave area multi-beam sounding terrain reconstruction method based on remote sensing image features. Terrain reconstruction is conducted to multi-beam sounding data which are obtained in an interval type measuring line mode by that feature information (sand wave ripples and wave crests) and a sand wave terrain distribution law are utilized, wherein the feature information (sand wave ripples and wave crests) and the sand wave terrain distribution law of the shallow sea sand wave terrain are presented in a remote sensing image. Therefore, integrated sand wave terrain information is obtained. The shallow sea sand wave area multi-beam sounding terrain reconstruction method based on the remote sensing image features aims at terrain mapping requirements of wide distributed shallow sea sand wave terrain areas. Sand wave textures and sand wave crest lines in the remote sensing image are served as reference control information to lead into the multi-beam sounding data terrain reconstruction. High-accuracy shallow sea sand wave area terrain can be reconstructed through the multi-beam sounding data, wherein the multi-beam sounding data are obtained in an interval type measuring line mode. The shallow sea sand wave area multi-beam sounding terrain reconstruction method based on the remote sensing image features is an innovation of a cross application aspect of remote sensing information technology and multi-beam sounding technology. The shallow sea sand wave area multi-beam sounding terrain reconstruction method based on the remote sensing image features has great practical values.
Owner:SECOND INST OF OCEANOGRAPHY MNR
Seabed sand wave geomorphology movement detection method based on MBES (multi-beam echo sounding)
ActiveCN103389077AGuaranteed working conditionMeet the national standard requirementsOpen water surveyOcean bottomSurvey research
The invention discloses a method of hydrographic surveying and charting and submarine topography geomorphologic survey research, and particularly discloses a seabed sand wave geomorphology movement detection method based on MBES (multi-beam echo sounding). The method provided by the invention adopts a decimeter grade measurement accuracy multi-beam sounding technology and a sub-meter grade positional accuracy navigational positioning system, the movement rate and direction of the seabed sand wave geomorphology are obtained through preparation before seabed sand wave detection based on the MBES, the detection of the seabed sand wave geomorphology based on the MBES, a DDM (difference of depth of modulation) construction based on the MBES measured data, secondary detection and treatment as well as sand wave movement rate calculation. The invention provides an exquisite detection scheme of a seabed sand wave movement and a rapid construction method of seabed grids and further provides an exact calculating method of the movement rate of the seabed sand wave, the methods have the important application values for hydrographic surveying and charting, oceanographic survey and seabed scientific research in a seabed high active region.
Owner:SECOND INST OF OCEANOGRAPHY MNR
Method and device for observing submarine sand wave migration based on pressure meter
ActiveCN107063196ARealize long-term in-situ observationHigh reusabilityOpen water surveyWater resource assessmentMeasurement deviceObservation point
The invention discloses a method and device for observing submarine sand wave migration based on a pressure meter. The device comprises an observation system and auxiliary equipment, wherein the auxiliary equipment comprises an auxiliary ship, a lifting device and the like; the observation system is integration of a fixed device, a period observation device and a wavelength observation device; the period observation device and the wavelength observation device are balls with holes, a water depth pressure meter, an MRU three-dimensional attitude sensor and a rotary sediment profile imager are fixed in each of the period observation device and the wavelength observation device; and the principle is measuring a time interval between adjacent water pressure with extreme values and wavelengths thereof and then calculating the migration rate of a submarine sand wave. The method comprises the steps of calibrating instruments indoors; positioning a target observation point by using the auxiliary ship and laying the observation system; and observing and recording the period and the wavelength of submarine sand wave migration through the period and wavelength observation system, thereby achieving observation of submarine sand wave migration. A novel idea and method is provided for observation of submarine sand wave migration, and the device and the method have the characteristics of being simple in operation step and long in in-situ measurement period, can be repeatedly utilized, and are suitable for long-term in-situ observation of shallow submarine sand wave migration.
Owner:OCEAN UNIV OF CHINA
Multi-stage penetration type submarine sand wave in-situ observation device and method based on resistivity feeler lever
ActiveCN109579801AEnsure safetyIn-situ real-time measurement is applicable to a wide range of watersOpen water surveyOcean bottomStructure of the Earth
The invention provides a multi-stage penetration type submarine sand wave in-situ observation device and method based on a resistivity feeler lever. The device comprises a support structure, a multi-stage penetration mechanism, an annular electrode resistivity feeler lever, and a matched observation apparatus. The principle thereof is as follows: penetration of the feeler lever is performed depending on a multi-stage penetration system triggered by characteristics of different stages of sand wave migration, observation of a potential value of a penetration region is performed through the feeler lever, a resistivity sudden change cross section elevation is extracted, and the change of a sandy seabed surface elevation with time is analyzed. The method includes implementation of the multi-stage penetration system and resistivity inversion submarine sand wave elevation change. According to the device and method, a new observation thought is provided for in-situ real-time observation of submarine sand wave migration, a new method is provided for penetration of medium and small submarine sand wave development areas, the device is simple and easy to use, and the applicable water area of in-situ real-time measurement is wide.
Owner:OCEAN UNIV OF CHINA
Reconstruction method for terrain of shallow-sea large-sized complicated sand wave area
The invention discloses a reconstruction method for terrain of a shallow-sea large-sized complicated sand wave area. According to the reconstruction method, the terrain reconstruction is carried out on multi-beam depth sounding data of the shallow-sea large-sized complicated sand wave area acquired in an interval measuring line way by utilizing characteristic information (sand wave ripples and wave ridges) in a remote sensing image and the distribution rule of the sand wave terrain, so that complete sand wave terrain information can be acquired. Aiming at the surveying and mapping requirement of the shallow-sea sand wave area which is widely distributed, the sand wave ripples and the sand wave ridges in the remote sensing image are used as reference control information to be introduced into the multi-beam depth sounding data terrain reconstruction, the high-precision terrain reconstruction of the multi-beam depth sounding data acquired in the interval measuring line way in the shallow-sea large-sized complicated sand wave area can be realized by virtue of partition combination and overlap continuous assignment treatment of the large-sized complicated sand wave area can be realized, and the reconstruction method is an innovation on the aspect of cross application of a remote sensing information technology and a multi-beam depth sounding technology and is relatively high in practical value.
Owner:SECOND INST OF OCEANOGRAPHY MNR
Device and experimental method for simulating influence on pipeline project by seabed tide sand waves
The invention discloses a device and experimental method for simulating influence on a pipeline project by seabed tide sand waves. The device includes an experimental sink and tide generating system,a terrain scanning system, a seabed pipeline simulation measurement system and a data acquisition and processing controller. The experimental sink and tide generating system is used for simulating seabed sand slopes and utilizing a water pump for forming reciprocating current. The terrain scanning system collects forms of the sand slopes by utilizing an ultrasonic topographic instrument and transmits data to the data collecting and processing controller. The seabed pipeline simulation measurement system utilizes optical fiber strain sensors arranged on the side walls of a pipeline model to collect pipeline deformation data, utilizes a high speed camera to collect pipeline displacement information and transmits the information to the data collection and processing controller. By adopting the device provided by the invention, experiments studying influence on the pipeline project by seabed tide sand waves can be conducted. According to the invention, the water pump is utilized for forming a periodically changing water current simulation tide field, in combination with the formation of tide sand slopes, influence on seabed pipelines by sand waves is simulated. The collected data is real and the reference value is high.
Owner:TIANJIN UNIV
Method for renovating movable-bed physical model design in upper Yangtze River pebble beach dangerous sea channel
The invention discloses a method for renovating the movable-bed physical model design in an upper Yangtze River pebble beach dangerous sea channel. The method comprises the following steps of: selecting proper model sand; determining a proper model scale; determining the geometrical morphology of the model. According to the method disclosed by the invention, the physical properties of light model sand and natural sand are compared; the motion characteristics of two model sands, i.e. the natural sand and the light sand, are compared from three aspects of sediment start, sand transmission rate and sand wave motion by a 28m flume experiment; the Chongqing urban city Zhuerqi river reach positioned on the Three Gorges varying backwater tail end is selected to research and compare the adaptation of the natural model sand and the light model sand when dredged channel scouring and siltation are simulated via the physical model experiment; the adaptation of the two types of model sand in a bed load movable-bed physical model is analyzed; the characteristics of different types of model sands are combined with the motion characteristics of the water flow and the dredged channel sediment of the upper Yangtze River pebble beach to analyze to obtain the method for renovating the movable-bed physical model design in the upper Yangtze River pebble beach dangerous sea channel.
Owner:CHONGQING JIAOTONG UNIVERSITY
Method for using remote sensing images to measure sand wave water depth
The invention discloses a new method for using remote sensing images to measure the sand wave water depth of shallow sea. The new method for using the remote sensing images to measure the sand wave water depth of the shallow sea uses the bright-dark stripe feature information of the shallow sea sand wave terrain presented in the remote sensing images and the quantitative relations among the space position thereof, intensity and sand wave water depth to measure the sand wave water depth of the shallow sea. According to the terrain change monitoring requirement for the broadly distributed shallow sea sand wave regions, by means of the large-scale coverage and high-frequency revisit ability of a remote sensing technology method, the gray data of the remote sensing images are quantitatively processed based on the bright-dark stripe features (comprising the strength and space distribution features of the bright and dark stripes) in the remote sensing images generated by the modulation of the sand wave terrain for the water body flow field and sea surface roughness, and moreover, the gray data are converted through a little of measured data to obtain the sand wave water depth information; the new method for using the remote sensing images to measure the sand wave water depth is used for monitoring the dynamic change of the underwater terrain of the shallow sea, is an innovation for using the remote sensing information technology for the shallow sea water depth measurement, and is very high in practical value.
Owner:SECOND INST OF OCEANOGRAPHY MNR
Self-stabilization type high-precision sediment bed load measuring system and measuring method
ActiveCN111060427ANo disturbanceMeet measurement needsFlow propertiesHydrodynamic testingOriginal dataBed load
The invention relates to a self-stabilization type high-precision sediment bed load measuring system and a measuring method. The measuring method comprises the steps of determining a measuring river reach; selecting a measuring section; planning a position of a depth measuring ship; positioning the depth measuring ship in place; carrying out measurement early-stage preparation work; simultaneouslystarting measurement at two points; processing original data; and calculating and outputting a result. In the invention, a motion form and characteristics of sand waves on a surface of a riverbed areobtained by stably and accurately measuring a riverbed form of the river reach so that a single-width bed load sediment transport rate of the riverbed is accurately measured and analyzed in real timeunder a condition that original sediment transport and water flow of the riverbed are not interfered.
Owner:HOHAI UNIV +1
Device and method for in-situ real-time observation of seabed sand waves
ActiveCN107631720BRealize in-situ real-time observationStable and reliable observation resultsOpen water surveyOcean bottomGrating
The invention relates to an apparatus and method for the in-situ real-time observation of submarine sand waves. The apparatus includes an observation system and auxiliary devices. The auxiliary devices comprise an auxiliary ship and a hoisting device; the observation system includes a gravity anchor, a fiber grating floating earth weight sensor, a Kevlar cable, an underwater acoustic releaser group, a lower floating ball bracket, a wave and tide gauge, an upper floating ball bracket, an MRU three-dimensional attitude sensor, a satellite communication machine, an imaging sonar, a solar cell anda main floating body. The principle of the apparatus and the method is characterized in that submarine pressure change caused by the migration of the submarine sand waves is observed, the time interval, elevation and wavelength data of two adjacent extreme submarine pressures are analyzed, and the migration rate of the submarine sand waves is calculated. The method includes the following steps: selection of an observation point and a deployment time, system deployment, recovery, and data processing. The apparatus and the method provide a new idea for the in-situ real-time observation of the submarine sand waves, have the characteristics of simple and easy device, long in-situ real-time measurement period and wide applicable water range, and can realize the in-situ real-time long-term observation of the migration of the submarine sand waves.
Owner:OCEAN UNIV OF CHINA
Method for automatically identifying seabed sand wave features based on ODP
ActiveCN104063614AAccurate identificationEfficient identificationSpecial data processing applicationsOcean bottomComputer graphics
The invention discloses a method for automatically identifying seabed sand wave features based on an ODP. By means of the method, feature points of ridge lines and valley lines of seabed sand waves are extracted by means of an extreme value derived and judged according to the optimal profile direction of a water depth curve, and used for automatic identification and extraction of a seabed sand wave feature line. By means of the steps of (1) constructing a digital water depth matrix, (2) constructing an optimal direction matrix and (3) extracting the seabed sand wave features, automatic identification of the seabed sand waves is achieved. The method is verified by a multi-beam water depth data test in an actual measurement mode, the correlation coefficient of the seabed sand wave feature automatically identified by the method and the feature line identified by workers is higher than 80 percent, and compared with the traditional method, and the accuracy rate of automatic identification is increased by 30 percent averagely. Furthermore, no setting of a threshold value is needed, so that working efficiency is increased greatly. The method can be applied to automatic identification of other types of submarine topography and land topography, and has important practical application value in aspects of hydrographic surveying and charting, marine geographic information systems, computer graphics, seabed scientific researches and the like.
Owner:SECOND INST OF OCEANOGRAPHY MNR
Method for identifying pebble sand waves on upper reach channels of Yangtze River
The invention discloses a method for identifying pebble sand waves on upper reach channels of the Yangtze River. The method comprises the following steps that actual measurement of fundamental data is conducted on a channel to be distinguished, or the fundamental data are calculated and acquired by establishing a two-dimensional mathematical model of a river reach; the range of the water flow of the water reach is determined; the transport and distinguishing coefficient of bed loads in the range of the channel is calculated; whether pebble sand waves are generated or not nearby the channel in the range of an engineering river reach is judged according to a calculating result; counter measures are taken after the sand waves happen. According to the method, the movement rule of the pebble sand waves is systematically studied through indoor flume experiments and site inspection data analysis, the critical conditions of occurring of the pebble sand wave movement are obtained, an identifying technology for identifying whether the pebble sand wave movement occurs or not in the upper reach channels of the Yangtze River is provided, ships are effectively protected to navigate safely, and the problem of lacking the identifying method for the pebble sand wave movement currently is better solved.
Owner:CHONGQING JIAOTONG UNIVERSITY
Seabed sand wave evolution simulation method
ActiveCN112580270AEliminate the steps of surveying and mappingImprove accuracyHydrodynamic testingMeasuring open water movementSeabed sedimentNumerical models
The invention discloses a seabed sand wave evolution simulation method, which comprises the following steps of: acquiring characteristic hydrodynamic parameters of a research area by establishing a hydrodynamic numerical model based on a shallow water equation by utilizing water depth data and tide division data of an international public database; and based on the characteristic hydrodynamic parameters, integrating a vertical two-dimensional sediment geomorphic model to predict seabed sediment wave characteristics and activity, acquiring characteristic geomorphic wavelengths and characteristic geomorphic wave heights, and simulating the sediment wave evolution process in the target sea area and predicting the sediment wave evolution form. Multiple numerical calculations are combined, under the condition of less basic data, the wave length and wave height characteristics of the seabed sand wave can be predicted more efficiently, the evolution of the seabed sand wave can be simulated, the simulation accuracy is higher, the simulation result is more reasonable, the existing public database data is fully utilized. Time cost and economic cost are saved, and reference opinions can be provided for ocean engineering infrastructure and pipeline arrangement.
Owner:OFFSHORE OIL ENG CO LTD +1
Estimation method for bed load sediment transport rate of natural riverway
ActiveCN113737710AReduce inputThe calculation result is accurateHydraulic engineering apparatusWater resource assessmentSoil scienceRiver routing
The invention discloses a method for estimating a bed load sediment transport rate of a natural riverway. The method comprises the following steps: 1) acquiring boundary conditions; step 2) dividing sub-sections; step 3) calculating a riverbed resistance coefficient of each sub-section; step 4) calculating the average flow velocity of each sub-section; step 5) calculating the sand wave height and movement velocity of each sub-section; and step 6) calculating the bed load sediment transport rate of the whole section. According to the method for estimating the bed load sediment transport rate of the natural riverway, the bed load sediment transport rate under any flow condition can be rapidly and efficiently predicted, the defects of the traditional technology in the aspects of economic investment, data dependence and the like are overcome, and the method has wide universality and convenience in the field.
Owner:CHINA THREE GORGES CORPORATION
Testing device for monitoring submarine landslide mass transportation process, and test method
The invention discloses a testing device for monitoring submarine landslide mass transportation process, and a test method, and belongs to the technical field of the ocean engineering. Based on a critical shear stress starting condition, an equivalent simulation method is adopted, a testing device for monitoring the transportation of the submarine landslide body to the water environment is provided, and a test method for effectively testing and analyzing the characteristic parameters of the submarine landslide mass transportation process is provided according to the establishment and parameterconversion of an equivalent simulation relation and a test calibration relation. The testing device provided by the invention can monitor a change condition of the submarine landslide mass transportation process in real time, the parameters are convenient to obtain, and the data volume is rich; the test method is full in theory, convenient to popularize and beneficial to landslide hazard evaluation and engineering facility design work in ocean engineering; in addition, the method can be applied to the research of the mass transportation characteristics in the submarine landslide motion process and the research of the marine geological problems such as submarine sand waves, submarine sediment resuspension and the like.
Owner:DALIAN UNIV OF TECH +1
Method and device for measuring parameters of grait sand waves
InactiveCN103278427AImprove maintenance management levelImprove passabilityFlow propertiesSystems researchWavelength
The invention discloses a method and a device for measuring the parameters of grait sand waves in the upper reaches of Yangtze River. The method comprises the steps of analyzing factors, which influence the sand waves, by a single factor way according to test data, and carrying out relationship fitting to obtain a sand wave height expression. The method provided by the invention is used for measuring the dimension and the movement velocity of the grait sand waves in the upper reaches of Yangtze River. The method comprises the following steps of: systematically researching the movement low of the grait sand waves according to an indoor flume experiment and site inspection data analysis, expressing the factors, which influence the movement velocity of the sand waves, by an equation, fitting the factors with test flume data to obtain an equation of the wave velocity, analyzing the factors, which influence the height and the length of the sand waves, by the single factor way according to the test data, and carrying out the relationship fitting to obtain the height and the length of the sand waves. The method and the device have great significance for judging the grait sand wave navigation obstacle characteristic and the grait sand wave beach risk governance, so that the maintenance management level of the channel in the upper reaches of Yangtze River and the whole trafficability of the channel in the Xu-Yu segment can be improved, and the quick development of the Yangtze river transportation can be promoted.
Owner:CHONGQING JIAOTONG UNIVERSITY
Seabed sand wave sediment sampling device and method
ActiveCN111721581ARealize acquisitionRealize collection and recyclingWithdrawing sample devicesSeabed sedimentSand wave
The invention relates to the field of seabed sediment sampling, and particularly relates to a seabed sand wave sediment sampling device and method. The device comprises an extracting part and a sampling part, wherein the sampling part is movably connected with the extracting part; the extracting part comprises a plurality of steel pipe connecting rods which are arranged in parallel in the verticaldirection and a plurality of annular sand storage bins which are arranged in the axial direction of the steel pipe connecting rods; the annular sand storage bins are arranged between every two of theplurality of steel pipe connecting rods, an annular cavity is formed in the annular sand storage bin, the annular side wall of the annular sand storage bin is fixedly connected with the plurality ofsteel pipe connecting rods outside the annular sand storage bin, the top of the annular sand storage bin is open, and an annular hole is formed in the bottom of the annular sand storage bin. Effectivecollection of seabed sand wave soil samples is achieved, the structure is simple, recycling can be achieved for multiple times, and the use cost is reduced.
Owner:OCEAN UNIV OF CHINA
Side-scan sonar seabed sand wave detection method based on multi-scale convolution and pooling strategy
PendingCN113516626ASolve the problem of various morphological characteristics and serious interference of ocean reverberation noiseSolve the uneven distribution of sample sizeImage enhancementImage analysisWave shapeEcho intensity
The present invention provides a side-scan sonar seabed sand wave detection method based on the multi-scale convolution and pooling strategy, seabed sand wave identification is carried out based on deep learning, waveform matching analysis is combined, and the side-scan sonar seabed sand wave detection method is applied to seabed sand wave detection. Deep semantic information of a seabed sand wave image is extracted based on an accumulative learning bilateral branch network, and a pyramid convolution module and strip pooling are introduced according to characteristics of seabed sand waves to carry out feature adaptive optimization and global information enhancement, so that the problems of unbalanced number distribution of seabed sand wave samples, diverse morphological characteristics of sand waves in a complex seabed environment and serious interference of ocean reverberation noise are solved, the seabed sand waves are positioned by taking echo intensity as a research object through waveform matching, and the morphological characteristics such as wavelength, wave height and asymmetric index of the seabed sand waves and the migration trend of the seabed sand waves are analyzed. Therefore, a foundation is laid for further investigation and analysis of seabed sand waves.
Owner:OCEAN UNIV OF CHINA
Device for measuring seabed sand wave migration based on triangular pressure sensor and working method
ActiveCN113587908AThe principle of measurement is simpleImprove economyOpen water surveySea trialSand wave
The invention provides a device for measuring seabed sand wave migration based on a triangular pressure sensor and a working method. The device comprises a penetration probe rod, a stabilizing frame and the triangular pressure sensor, and the working method comprises the steps: S1, acquiring data, and determining a laying sea area; S2, carrying out equipment preparation; S3, performing sea trial; S4 ,enabling the device to work; and S5, recovering the device. According to the technical scheme, the method can guarantee that the migration direction and speed of the seabed sand waves are inversed through the pressure sensor, and has the advantages that the sand wave period and wave crest and wave trough morphological characteristic parameters can be measured, the migration speed and direction of the sand waves can be measured, wavelength characteristics can be inversed through a mathematical method; compared with a traditional method, the method is simple in measuring principle, and various sand wave migration characteristic data can be obtained; and compared with a similar method applied in the past, the method provided by the invention can obtain the morphological characteristics and migration parameters of the seabed sand waves only by using one technology of the pressure sensor, and has good economical efficiency.
Owner:OCEAN UNIV OF CHINA
Seabed sand wave landform motion detection device based on MBES
ActiveCN114739366AReduce distractionsImprove reliabilityMeasuring open water movementMeasuring open water depthGear wheelLandform
The invention provides a seabed sand wave landform motion detection device based on MBES, and relates to the technical field of seabed sand wave landform motion detection. The MBES-based seabed sand wave geomorphic motion detection device comprises an outer cylinder, three diagonal planes are arranged at the lower end of the outer cylinder, Doppler velocimeters are arranged at the diagonal planes, an electric push rod is fixedly connected to the upper inner wall of the outer cylinder, and a pressing frame is fixedly connected to the output end of the electric push rod; and the lower side wall of the outer cylinder is rotationally connected with a rotating inner seat, a second motor is arranged in the lower side wall of the outer cylinder, the output end of the second motor is fixedly connected with a gear, and outer teeth meshed with the gear are arranged on the outer side face of the middle of the rotating inner seat. According to the multi-beam echo depth sounder, the flow velocity of water flow in the water body can be measured through the Doppler current meter, then the flow direction of the water flow can be obtained, the blocking cover faces the water flow under the driving of the motor, the interference of the water flow on the multi-beam echo depth sounder is reduced under the action of the resonator, and the detection reliability is improved.
Owner:山东海慧勘察测绘有限公司
A device for in-situ observation of seabed sand waves based on internal solitary waves and its working method
ActiveCN111964651BImprove accuracyReduce the cost of observationHydrodynamic testingFluid resistance measurementsClassical mechanicsControl cell
The invention provides a seabed sand wave in-situ observation device based on internal solitary waves and a working method of the seabed sand wave in-situ observation device. The seabed sand wave in-situ observation device comprises a penetration power system, an observation system and a stabilization system. The penetration power system is composed of a recovery ring, a buoy, a Kevlar cable, a limiting cylinder, a cubic limiting block, a control unit, an annular control cabin, a heavy block and an annular iron block. The observation system is composed of an acoustic probe rod, an acoustic probe rod storage unit, a circular-truncated-cone-shaped limiting block, an one-way limiting device, a horizontal supporting rod, a resistivity probe rod, an electrode ring, a transmitting transducer, afirst penetration conical tip, a receiving transducer, a horizontal supporting rod and a second penetration conical tip. The stabilizing system is composed of a four-foot-frame limiting cylinder, a circular pipe, a stabilizing circular ring, a buffer device and a gravity anchor. By means of the seabed sand wave in-situ observation device, the penetration requirement of the seabed sand wave in-situobservation device is met, the penetration effect is guaranteed, the energy of the internal solitary waves is used as a resource, the design and operation cost of the device is reduced, and the seabed sand waves can be observed in situ in real time.
Owner:OCEAN UNIV OF CHINA
Seabed sand wave geomorphology movement detection method based on MBES (multi-beam echo sounding)
ActiveCN103389077BFor precise detectionSolutions for Fine Probing SolutionsOpen water surveyOcean bottomSurvey research
The invention discloses a method of hydrographic surveying and charting and submarine topography geomorphologic survey research, and particularly discloses a seabed sand wave geomorphology movement detection method based on MBES (multi-beam echo sounding). The method provided by the invention adopts a decimeter grade measurement accuracy multi-beam sounding technology and a sub-meter grade positional accuracy navigational positioning system, the movement rate and direction of the seabed sand wave geomorphology are obtained through preparation before seabed sand wave detection based on the MBES, the detection of the seabed sand wave geomorphology based on the MBES, a DDM (difference of depth of modulation) construction based on the MBES measured data, secondary detection and treatment as well as sand wave movement rate calculation. The invention provides an exquisite detection scheme of a seabed sand wave movement and a rapid construction method of seabed grids and further provides an exact calculating method of the movement rate of the seabed sand wave, the methods have the important application values for hydrographic surveying and charting, oceanographic survey and seabed scientific research in a seabed high active region.
Owner:SECOND INST OF OCEANOGRAPHY MNR
Seabed sand wave feature identification method
ActiveCN113283437ADosa wave feature samplesShorten the timeCharacter and pattern recognitionSand waveWave height
The invention discloses a seabed sand wave feature identification method, and relates to the technical field of offshore ocean engineering dynamic geologic and geomorphic environments. The method comprises the following steps: acquiring wave crest lines and wave trough lines of sand waves by utilizing actually measured water depth data and adopting an image identification method, grouping the wave crest lines and the wave trough lines of the sand waves through linear fitting and coordinate transformation, and further automatically acquiring characteristic information of the wave length, the wave height and the like of the sand waves in a large area by utilizing information of the wave crest lines and the wave trough lines of the sand waves. According to the method, the wave crest line and the wave trough line of the large-area seabed sand wave can be automatically identified, classified statistics can be automatically carried out on the wave crest line and the wave trough line of the sand wave, a large amount of sand wave characteristic data is further obtained, basic data is provided for further analyzing the relation among the wave length, the wave height, the water depth, the hydrodynamic force and the like of the sand wave, time and cost are saved, and efficiency is improved.
Owner:OCEAN UNIV OF CHINA
Measuring system and method of moving mass sediment transport rate based on cross-correlation method
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION +1
Device and method for observing seabed sand wave migration based on piezometer
ActiveCN107063196BRealize long-term in-situ observationHigh reusabilityOpen water surveyWater resource assessmentOcean bottomMeasurement device
The invention discloses a method and device for observing submarine sand wave migration based on a pressure meter. The device comprises an observation system and auxiliary equipment, wherein the auxiliary equipment comprises an auxiliary ship, a lifting device and the like; the observation system is integration of a fixed device, a period observation device and a wavelength observation device; the period observation device and the wavelength observation device are balls with holes, a water depth pressure meter, an MRU three-dimensional attitude sensor and a rotary sediment profile imager are fixed in each of the period observation device and the wavelength observation device; and the principle is measuring a time interval between adjacent water pressure with extreme values and wavelengths thereof and then calculating the migration rate of a submarine sand wave. The method comprises the steps of calibrating instruments indoors; positioning a target observation point by using the auxiliary ship and laying the observation system; and observing and recording the period and the wavelength of submarine sand wave migration through the period and wavelength observation system, thereby achieving observation of submarine sand wave migration. A novel idea and method is provided for observation of submarine sand wave migration, and the device and the method have the characteristics of being simple in operation step and long in in-situ measurement period, can be repeatedly utilized, and are suitable for long-term in-situ observation of shallow submarine sand wave migration.
Owner:OCEAN UNIV OF CHINA
In-situ observation system for seabed sand wave migration process
PendingCN114088067ASimple structureImprove anti-interference abilityWaterborne vesselsOpen water surveyBuoySand wave
The invention discloses an in-situ observation system for a seabed sand wave migration process, which comprises a set of sand wave sonar system, and is characterized in that the sand wave sonar system is arranged at a selected seabed target position to scan the same seabed area; the sand wave sonar system comprises a sonar assembly, a self-weight anchor, a support and a mooring rope; the sonar assembly is connected with the support, and the support is connected with the self-weight anchor and the cable; and the mooring rope is connected with a floating ball and a buoy from top to bottom. The in-situ observation system for the seabed sand wave migration process is simple and reasonable in structure, convenient to install and use, wide in application range and high in anti-interference capacity. Fixed-point and in-situ seabed sand wave migration observation can be realized, short-time-interval and long-time-period continuous observation can also be realized, and the system is of great significance to research of a seabed sand wave migration rule. The system is worthy of popularization and use.
Owner:海南省地球物理学会 +1
A Sand Wave Movement Prediction Method Applicable to Typhoon Region
ActiveCN109145467BExact fitPrediction results are stable and accurateDesign optimisation/simulationSpecial data processing applicationsWave shapeSand wave
The invention provides a sand wave movement prediction method suitable for typhoon region, which is based on three angles of statistics, physics and practicality, puts forward the movement speed of spectral energy average, and the prediction result is stable and accurate. Different from the existing scalar form, the action vector of typhoon movement process is calculated, and the influence of different typhoon positions is superposed. According to the reason that some typhoons have great influence in a short time, but the typhoons cancel each other in a long time, the movement caused by the interaction of conventional wave and current is calculated, and the long-term waveform is predicted. Compared with other methods, this model has the advantages of high efficiency and high precision, andcan be used to predict the bed evolution in 10-20 years.
Owner:INST OF MECHANICS CHINESE ACAD OF SCI
Device and method for multi-stage penetration submarine sand wave in-situ observation based on resistivity probe rod
ActiveCN109579801BEnsure safetyIn-situ real-time measurement is applicable to a wide range of watersOpen water surveySand waveSubmarine
The invention provides a multi-stage penetration type submarine sand wave in-situ observation device and method based on a resistivity feeler lever. The device comprises a support structure, a multi-stage penetration mechanism, an annular electrode resistivity feeler lever, and a matched observation apparatus. The principle thereof is as follows: penetration of the feeler lever is performed depending on a multi-stage penetration system triggered by characteristics of different stages of sand wave migration, observation of a potential value of a penetration region is performed through the feeler lever, a resistivity sudden change cross section elevation is extracted, and the change of a sandy seabed surface elevation with time is analyzed. The method includes implementation of the multi-stage penetration system and resistivity inversion submarine sand wave elevation change. According to the device and method, a new observation thought is provided for in-situ real-time observation of submarine sand wave migration, a new method is provided for penetration of medium and small submarine sand wave development areas, the device is simple and easy to use, and the applicable water area of in-situ real-time measurement is wide.
Owner:OCEAN UNIV OF CHINA
Seabed sand wave long-term observation device and observation method applied to internal wave development area
ActiveCN111721575BRealize in situ observation researchAccurate and reliable observation resultsWithdrawing sample devicesMeasuring open water movementObservational methodSand wave
The invention relates to the field of seabed observation, in particular to a seabed sand wave long-term observation device and observation method applied to an internal wave development area. The support mechanism is in the shape of a balance, including a gravity anchor, a hexagonal rod, a ring-shaped instrument control cabin and a support rod. The gravity anchor is located at the bottom of the entire device. The gravity anchor is connected to the ring-shaped instrument control cabin above it through several hexagonal rods. The internal wave energy The power generating mechanism is set in the ring-shaped instrument control cabin. Two support rods are symmetrically fixed on the outside of the ring-shaped instrument control cabin. One of the support rods is connected to the multi-functional observation rod through the mechanical grip ring at its end, and the other support rod is connected to the multi-functional observation rod through its end. The mechanical grabbing ring of the instrument is connected with the sandy sediment sampling rod, and the top of the ring-shaped instrument control cabin is connected with the submersible buoy at the seawater boundary level through a Kevlar cable. It makes full use of the energy of internal ocean waves to realize long-term in-situ observation of seabed sand waves. The observation results are accurate and reliable, and the observation cost is low. It also realizes the collection and recovery of seabed sand wave soil samples.
Owner:OCEAN UNIV OF CHINA
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