58 results about "Wave height" patented technology

The application discloses a marine buoy multi-source fusion positioning method and system based on a factor graph optimization, which acquires GNSS observation data, IMU measurement data and marine environment auxiliary data; a factor graph containing state nodes, GNSS position factors, IMU pre-integration factors and marine dynamics constraint factors is constructed, and wave and current theories are used to constrain buoy movement; in view of multipath effects, marine surface reflection geometry and marine root mean square wave height are combined to calculate a multipath weighting factor, and a GNSS covariance matrix is adaptively adjusted; according to IMU data, a sea state level is discriminated, and an edge window length and a trigger interval of incremental smoothing solving are adaptively linked and adjusted; through adjacent buoy ranging information, collaborative constraints are constructed, and based on Mahalanobis distance and chi-square distribution threshold value detection, abnormalities are detected and local reconstruction is performed. The application effectively suppresses marine surface multipath interference, slows down the accumulation of calculation errors during signal interruption, and realizes high-availability continuous positioning under limited computing power.

This invention proposes a method for observing ocean waves based on a binocular camera, belonging to the field of image processing technology. The method includes: S1: The binocular camera captures ocean wave images, generating ocean wave point cloud data at the current time t; S2: The ocean wave point cloud data in S1 is converted to ocean wave point cloud data in a geodetic coordinate system; S3: The ocean wave data in S2 undergoes quality screening and optimization, including: selecting the region of interest, quality screening, converting noisy data points to null values, null value filling, and Gaussian filtering; the quality screening classifies the ocean wave data into three levels: excellent, good, and poor; S4: Based on the excellent and good quality ocean wave point cloud data, the wave height, wavelength, and period at that time are calculated; S5: S1-S4 are repeated to obtain multiple frames of ocean wave point cloud data at different times, and the effective wave height, wavelength, period, and wave spectrum are calculated. This method can fill in null values, making the overall data more reasonable and the obtained elevation data more accurate.

This invention provides an underwater oil storage system, method, and medium, relating to the field of offshore oil development technology. The system includes: an interconnected underwater oil storage unit, a data acquisition unit, and a control unit, all located in an underwater environment. The underwater oil storage unit includes several oil tanks for storing crude oil. The data acquisition unit is used to acquire first parameters of the crude oil, second parameters of the oil-water separation layer in the oil tanks, and third parameters of the underwater environment. The control unit is used to regulate the underwater oil storage unit based on the first, second, and third parameters. The first parameters include temperature and content; the second parameters include pressure difference; and the third parameters include flow velocity and wave height. In this way, the data acquisition unit can monitor the oil-water separation and underwater environment conditions in real time, enabling the control unit to regulate the underwater oil storage unit. This allows for the timely detection and resolution of potential underwater safety hazards, ensuring the safety of underwater oil storage.

This invention provides a porous wave-damping plate for aquaculture cages, specifically belonging to the field of wave-damping technology for aquaculture cages. It comprises a porous plate, wave-damping buoys, and a hollow cavity structure, forming a highly efficient energy dissipation system. The alternating openings on the surface of the porous plate allow waves to pass through. When waves impact the plate, seawater enters the hollow cavity and drives the internal wave-damping buoys to generate minute movements and collisions, thereby significantly reducing wave height and impact force. This directly protects the fish in the cage from the impact of violent water currents. The invention includes a plate body, which is detachably and fixedly installed on the outside of the cage. The plate body is a hollow plate-like structure with through holes on both the front and back sides, and the cavity of the hollow plate-like structure is filled with several wave-damping buoys for dissipating wave energy. It includes multiple plate bodies, which are spliced ​​together to form a wave-damping plate assembly. The upper end of the plate body is provided with a tenon, and the lower end of the plate body is provided with a mortise. Adjacent plates are interlocked and positioned by the tenon and mortise.

This invention discloses an anti-sloshing device and its control method for an oil-water separator tank on an offshore platform, belonging to the field of offshore oil and gas development equipment. The device includes a tank body, a condition monitoring component (DVL flow meter and wave height meter), symmetrically arranged liftable wave generators, and a control unit. Based on the monitored fluid direction and wave height data, the control unit drives the wave generator on the same side as the flow direction to generate reverse waves with opposite propagation directions and matching wave heights, actively counteracting sloshing. This invention dynamically suppresses liquid sloshing through a closed-loop control system of "monitoring-analysis-reverse wave generation," significantly improving separation stability and efficiency while reducing structural load.

This invention discloses a method for estimating sea state levels based on visual information. The method includes acquiring image and video data of a target sea area through an image acquisition module; using a combination of median filtering and Gaussian filtering for noise reduction, and histogram equalization to enhance data contrast; performing image geometric correction using radial distortion correction and tangential distortion correction models; extracting wave texture features, motion features, and wave height features from the preprocessed data; inputting the extracted features into a trained sea state level classification model for training, and outputting the sea state level estimation result. During training, multi-model fusion and dynamic model updating methods are used to improve the accuracy and reliability of the estimation. This invention uses a camera to collect wave information within a certain distance and range, and automatically estimates the sea state level based on this information, thus solving the problems of high cost, limited measurement range, significant environmental influence, and low accuracy in existing sea state level estimation methods.

Disclosed in the present invention is a hull form of a shallow-draft anti-rolling transport vessel. The hull form comprises a stern section, a cargo hold section and a bow section which are connected in sequence, wherein the length of the stern section does not exceed 30% of the overall length of a vessel; the length of the bow section does not exceed 25% of the overall length of the vessel; the stern section uses a multi-hull structure; the cargo hold section uses a monohull structure; the bottom of the cargo hold section is of a double-bottom structure; the bow section uses a catamaran structure; side flare structures are arranged at both sides of the stern section and the bow section; the stern section, the cargo hold section and the bow section share a main deck; and the main deck is a flat grillage. In the present invention, by means of reducing the draft, a wetted surface area and a wave height during high-speed navigation are reduced, thereby greatly reducing wave-making resistance; and the stability and seakeeping performance of the vessel under severe sea conditions are also taken into account.

This invention discloses a method for identifying multiple wave breaking events in numerical calculations, belonging to the field of fluid dynamics in marine engineering. The method includes: determining saturated breaking wave state indices, modifying the wave energy dissipation expression, and constructing a cyclical discrimination logic combining critical breaking wave height and critical recovery wave height. This invention can accurately capture the multi-peak wave height characteristics during multiple wave breaking events, accurately reproduce the bimodal morphology of coastal current velocity profiles, significantly improve the accuracy of numerical simulations of wave propagation and nearshore circulation on gently sloping coasts, and provide reliable technical support for coastal engineering design, sediment transport prediction, and pollutant diffusion simulation.

The application discloses an effective wave height double-stage space-time prediction method and system based on diffusion residual correction, relates to the technical field of sea wave prediction, and inputs historical effective wave height data and corresponding historical wind field data into an effective wave height space-time prediction model for processing to obtain a preliminary effective wave height prediction result, and then inputs the preliminary effective wave height prediction result, the historical effective wave height data and synchronous forecast wind field data into a residual correction module based on a diffusion model to compensate for the preliminary prediction error and obtain a final effective wave height prediction result. The diffusion model based on the EDM architecture is innovatively introduced to finely reconstruct the prediction residual, the basic prediction field, the synchronous wind field dynamic factor and the prediction time limit are taken as multi-dimensional physical strong conditions to inject the diffusion generation process, the application can deterministically restore the high-frequency texture details and nonlinear wave components missed by the first-stage model, to a certain extent, the application can relieve the long-term deviation accumulation, improve the prediction quality in high wave areas and improve the prediction stability.

This application discloses a method and system for assessing extreme environmental conditions in coastal engineering, relating to the fields of marine and coastal engineering technology. The method includes: establishing wave propagation deformation conversion relationships; performing quality control on multi-source wave-tide data; performing tidal level decomposition on the total water level time series; identifying multiple independent extreme wave-tide coupling events, extracting characteristic parameters to form a multi-dimensional extreme sample set, and establishing a joint distribution model; determining the target probability level and constructing an environmental profile with equal exceedance probabilities; selecting representative combined operating conditions, and using the wave propagation deformation conversion relationships to convert the representative combined operating conditions to nearshore control points to obtain design wave elements. This application, driven by multi-source wave-tide data, establishes a joint distribution model of wave height, period, and tidal level and constructs an environmental profile with equal exceedance probabilities, achieving quantitative determination of extreme design wave conditions with clear joint probability meanings, thus improving the scientific and economical nature of coastal engineering design.

The application discloses a kind of compartmentalization type wave overtopping measurement method and measuring device.The device includes a plurality of cascading arrangement measuring cabin, each measuring cabin is divided into front pool and rear store by the partition with communication hole, wave height instrument is arranged in rear store.The method includes: obtaining the water level data of rear store;Based on the time rate of change of water level data and the preset partition hydraulic transfer function, the instantaneous total amount of water storage of measuring cabin is determined;According to the time rate of change of instantaneous total amount of water storage, the instantaneous wave overtopping flow entering measuring cabin is obtained by inversion;Based on the time distribution characteristics of instantaneous wave overtopping flow, single-wave wave overtopping event is identified and single-wave wave overtopping volume is calculated.The application solves the contradiction between large-capacity trapping and high-precision single-wave trapping by the combination of physical compartmentation and algorithm inversion, and realizes the synchronous measurement of average wave overtopping and single-wave maximum wave overtopping.

A management device (100) acquires the wave height and the wind speed at the installation site of a wind turbine generator (20). The management device (100) generates individual prediction information on the basis of prediction information from a weather server (80), the wave height, and the wind speed. The management device (100) then determines a maintenance schedule for the wind turbine generator (20) on the basis of the individual prediction information.

This invention belongs to the field of wave height prediction technology and discloses a wave prediction method that considers the evolution characteristics of the marine environment. The method includes the following steps: (1) collecting historical data on significant wave height, average period, and wind speed of waves in the target sea area and processing the data; (2) performing seasonal trend decomposition on the significant wave height sequence to obtain trend terms, seasonal terms, and residual terms; (3) calculating wind and wave response indices based on wind speed changes, wave average period changes, and significant wave height changes; (4) generating wind and wave response state weights and using these weights to adjust the influence of different historical time steps, different wave height components, and meteorological and oceanographic elements in the prediction process; (5) correcting the prediction contributions of the trend terms, seasonal terms, and residual terms with weights, and reconstructing the predicted future significant wave height. This invention can improve the stability of significant wave height prediction during periods of significant wind speed changes or sea state transitions.

This invention relates to the field of marine engineering safety early warning and intelligent prediction, and in particular to a point-to-area short-term wave height prediction method and system for offshore construction early warning. The invention takes historical pattern wave height, historical reference monitoring wave height, and future pattern wave height of a measurement point as inputs. It constructs a short-term prediction model based on a Transformer encoder and introduces a joint loss function including absolute error, large value underestimation penalty, trend asymmetry, residual, and peak time terms to automatically output the future correction results for each measurement point. Then, based on the mapping relationship between the measurement point and the corresponding coverage area, the correction results of the measurement point are extended to the entire target area to form a corrected wave height field. Combined with construction thresholds, it automatically determines the levels of normal, attention, alert, and work stoppage. Without requiring continuous manual interpretation, it forms a complete closed loop from data acquisition, regional analysis, prediction, regional correction to graded early warning and result storage and push.

The application discloses a kind of compartmentalization type wave overtopping measurement method and measuring device.The device includes a plurality of cascaded measurement cabin, each measurement cabin is divided into front pool and rear store by the partition with communication hole, wave height instrument is arranged in rear store.The method includes: obtaining the water level data of rear store;Based on the time rate of change of water level data and the preset partition hydraulic transfer function, the instantaneous total amount of water storage of measurement cabin is determined;According to the time rate of change of instantaneous total amount of water storage, the instantaneous wave overtopping flow entering measurement cabin is obtained by inversion;Based on the time distribution characteristics of instantaneous wave overtopping flow, single-wave wave overtopping event is identified and single-wave wave overtopping volume is calculated.The application solves the contradiction between large-capacity trapping and high-precision single-wave trapping by the combination of physical compartmentation and algorithm inversion, and realizes the synchronous measurement of average wave overtopping and single-wave maximum wave overtopping.

The application discloses a marine buoy multi-source fusion positioning method and system based on a factor graph optimization, which acquires GNSS observation data, IMU measurement data and marine environment auxiliary data; a factor graph containing state nodes, GNSS position factors, IMU pre-integration factors and marine dynamics constraint factors is constructed, and wave and current theories are used to constrain buoy movement; in view of multipath effects, marine surface reflection geometry and marine root mean square wave height are combined to calculate a multipath weighting factor, and a GNSS covariance matrix is adaptively adjusted; according to IMU data, a sea state level is discriminated, and an edge window length and a trigger interval of incremental smoothing solving are adaptively linked and adjusted; through adjacent buoy ranging information, collaborative constraints are constructed, and based on Mahalanobis distance and chi-square distribution threshold value detection, abnormalities are detected and local reconstruction is performed. The application effectively suppresses marine surface multipath interference, slows down the accumulation of calculation errors during signal interruption, and realizes high-availability continuous positioning under limited computing power.

The application provides a cross-medium cooperative sensing underwater acoustic communication method applied to a wave glider platform, comprising the following steps: acquiring a wave height parameter by using a wave height instrument carried on the wave glider platform, and performing cross-medium cooperative estimation on sea surface dynamic parameters based on a correlation between the wave height parameter and dynamic characteristics of sea surface waves; for a slowly-varying underwater acoustic channel, setting a channel update time of a time reversal underwater acoustic communication receiver by using a stationary time corresponding to the wave height parameter, periodically acquiring underwater acoustic channel characteristics to ensure that the parameters of the time reversal receiver are adapted to the channel; and for a fast-varying underwater acoustic channel, using time reversal channel estimation to reduce the number of periodic channel estimation times. The method fully utilizes the characteristics that the wave glider platform works at the water-air interface, and provides a kind of underwater acoustic communication method which is adapted to the working characteristics of the wave glider platform.

A seaplane model water entry experiment synchronous control system and method, including: central control module, wave generator control module, motor control module and trigger and data acquisition module, based on real-time wave height data and propagation model prediction wave arrival experiment water area target phase delay Δt1; combined with real-time speed and free fall model dynamic calculation model release delay Δt2; in the accurate timing trigger release, shooting and collection; and innovatively adopt multi-frame image sequence depth learning phase regression and incremental bayesian optimization method, construct closed loop error compensation mechanism, adaptive correction subsequent experiment parameter. The present application is unified by central control module scheduling, realizes the time sequence synchronization of multiple devices (less than 100 mu s) at the same time, based on the adaptive control and error compensation of position feedback, realizes the accurate experiment test.

This invention proposes a method and apparatus for designing an equivalent model of ocean wave backgrounds. The method acquires simulated ocean wave echo data of different wave levels and performs data analysis and fitting to generate multiple sets of simulated ocean wave echo data for different scenarios. Each set of simulated ocean wave echo data is distributed, and a signal amplitude simulation device is used to simulate the reflection characteristics. Simultaneously, a detection device is controlled to collect multiple sets of ocean wave echo amplitude data. Then, through statistical analysis of the collected echo data, it is compared and evaluated with the corresponding simulation data to obtain the true wave height, corresponding wave level, echo amplitude, and statistical accuracy of the data matching between the simulation data and the echo data. This yields a realistic assessment and simulation of the target ocean wave level. The established echo model can realistically reflect the characteristics of actual ocean wave echoes, eliminating the shortcomings of previous models that could not be verified in real-world scenarios within simulation environments. This achieves an effective closed loop of real-time generation and real-time evaluation feedback.

This invention relates to an experimental apparatus and method for simulating ship motion under severe sea conditions, belonging to the field of ship wave load testing technology. It addresses the problem that existing severe sea condition wave load testing technologies are insufficient in simulating realistic waves under actual sea conditions, such as high wave heights, distorted waves, and breaking waves. The wave-generating system includes a wave-generating plate located at one end of a water tank and swinging along the length of the tank, and a driving component for driving the wave-generating plate's swing. The nonlinear wave generation system includes a wave-generating rod and several jet pipes. The wave-generating rod is arranged along the width of the water tank and slidably set along the height of the water tank via a height adjustment component. The jet pipes are all located at the bottom of the water tank. This invention enables the simulation of the water-air mixture flow field and accurate measurement of loads in distorted and nonlinear waves under severe sea conditions. It allows for a wide variety of experimental types and diverse functions, and can replace the expensive and costly towing tanks used for general ship models.

The present application relates to a kind of wave energy convergence device based on floating flexible flat, including flexible flat, mooring chain, seabed anchor block and wave power generation device;Mooring chain two ends are connected to flexible flat and seabed anchor block respectively;The thickness of flexible flat gradually increases from one end of flexible flat to the other end, recess is arranged in the middle of flexible flat and extends from one end of flexible flat to the other end;Wave power generation device is arranged in the back of the recess of flexible flat.Wave can form hydroelastic wave that spreads on flexible flat when wave is incident to the front edge end of flexible flat.Hydroelastic wave is transmitted at the back end of flexible flat, and wave enters the water surface behind flexible flat.Wave power generation device is arranged in the back of the recess of flexible flat, and it is the place where wave height and wave energy density are maximum due to the influence of the effect of hydroelastic wave convergence by flexible flat, so potential energy and kinetic energy of wave can be converted into mechanical energy and electric energy to the greatest extent, and flexible flat will not hinder the natural flow of water body, and the construction and installation cost is low.

The application relates to the technical field of marine ecological disaster monitoring, and discloses a green algae area estimation method based on an unmanned aerial vehicle non-orthographic operation mode, which comprises the following steps: firstly, spectrum energy analysis is used to determine a sea state mode and to inversely calculate a basic wave height, a vertical non-uniform atmospheric extinction model is constructed to perform physical defogging; secondly, a fluid-solid coupling damping coefficient is inversely calculated based on texture entropy and glare characteristics, and a green algae microscopic equivalent mean square slope is corrected; finally, pixel-level macroscopic slant range projection, a wave shielding compensation factor and a microscopic surface area correction factor are comprehensively used, and a Sigmoid smoothing truncation weight function is combined to calculate a green algae physical total surface area. The application solves the measurement error caused by the non-uniformity of atmospheric medium, wave shielding and the absence of microscopic geometric characteristics under non-orthographic observation, and significantly improves the monitoring accuracy under complex sea conditions.

The utility model relates to a kind of flexible resin flow guide tape, the flexible resin flow guide tape includes wave-shaped flow guide net layer and surface felt layer, the surface felt layer is set in the upper and lower two surfaces of the wave-shaped flow guide net layer, and the surface felt layer is also set in the two side surfaces of the wave-shaped flow guide net layer opposite to each other;The wave-shaped flow guide net layer includes wave-shaped flow guide net;The wave-shaped flow guide net has continuous wave-shaped convex arrangement of flow guide fiber composition;The ratio of the average wave height and average wavelength of the wave-shaped flow guide net is 1:(0.5~1.5).Flexible resin flow guide tape provided by the utility model has the advantages of being bendable, not easy to compress, easy to lay, easy to demould after pouring is finished.

The application discloses a ship fuel consumption prediction and correction method based on AIS and marine environment data, and relates to the technical field of ship fuel consumption prediction, and comprises the following steps: acquiring AIS dynamic data of a target ship and constructing a continuous navigation state sequence; acquiring wind speed, wind direction, flow speed, flow direction and effective wave height at a corresponding moment according to space-time position matching; calculating relative water body speed and relative wind speed based on vector decomposition, and respectively calculating ship body resistance, wind resistance and wave additional resistance; superimposing the three to obtain total resistance; inversely calculating propelling power according to the dynamic relationship between total resistance and relative water body speed; and finally calculating real-time fuel consumption according to the propelling power and a preset main engine fuel consumption rate. The method realizes ship fuel consumption prediction based on a physical model under the condition of no actual measured fuel consumption data. The application realizes high-precision physical model prediction of ship fuel consumption through dynamic coupling and power inversion of AIS and marine environment data under the condition of no actual measured fuel consumption data.

This invention relates to the field of wave height prediction technology, and particularly to a method and system for mitigating the problem of cross-site wave height prediction domain offset. The method for mitigating the cross-site wave height prediction domain offset problem includes the following steps: S10: acquiring a pre-trained wave prediction model and wave height data of the target domain stations; the pre-trained wave prediction model is a model obtained by iteratively training historical wave height data of source domain stations until the loss function converges; the target domain station wave height data is real-time or historical wave height observation data collected within the target area to be predicted. This solution eradicates domain offset from the data end through target domain statistical adaptation, and zero-parameter updates solve the high time consumption problem of existing methods. It also has the advantages of convenient deployment and strong generalization, significantly improving the accuracy and consistency of cross-site prediction while greatly reducing the reuse cost of the pre-trained wave prediction model and improving the feasibility of engineering implementation.

This invention proposes a design method for an omnidirectional icebreaker wave generator in actual ice-covered sea areas. First, data collection and processing are performed, collecting and processing relevant information about the target sea area and sea ice. Then, based on the potential flow theory model, the wave generation period interval, sea ice strain response, wave height scaling factor are calculated. The wave height scaling factor is used to calculate the target wave height and maximum stroke, resulting in the target period wave. Finally, the target period wave is used to obtain the wave generator shape curve, completing the wave generator design.

This invention discloses a wave generation control method and apparatus for wave generators deployed at both ends in a wave testing tank. First, the target positions and target angular frequencies of two wave trains are determined based on the target function, which can be wave attenuation, bidirectional wave generation, or focused wave generation. Then, the propagation times of the two wave trains are calculated respectively. Based on the propagation times, the target activation time of the corresponding wave generator is determined. Finally, the corresponding wave generator is activated at the target activation time, generating the corresponding waves based on the target wave height and target angular frequency. In this invention, each end of the wave generators deployed at both ends can independently control wave generation at each end. Based on the synergistic effect of the wave generators deployed at both ends, wave propagation and superposition are controlled, accurately generating focused waves and simulating the effect of concentrated waves on marine structures.