14 results about "Breaking wave" patented technology

The invention discloses an extremely shallow water blue-green laser sounding dynamic refraction vision correction method, which belongs to the technical field of marine surveying and mapping and underwater detection, is used for laser refraction correction, and comprises the following steps: synchronously acquiring binocular images and inertial measurement unit attitude data, and generating a three-dimensional point cloud; according to a light spot area in the laser emission angle index point cloud, fitting a micro-tangent plane to obtain a water surface original normal vector; calculating a confidence coefficient weight according to the image texture definition, and iteratively calculating an optimal estimation normal vector based on the original normal vector and the weight; calculating a real incident angle according to the optimal estimation normal vector and the laser emitting direction; calculating the direction vector of the underwater refracted light according to the Snell's law; and calculating the underwater three-dimensional coordinates of the target point by combining the propagation distance of the laser in the air and the water and the emission origin coordinates. According to the method, the visual confidence is introduced, so that the problem of data failure when the traditional visual sounding encounters water surface reflection, glare or broken waves is solved, and the robustness under the complex sea condition is remarkably improved.

The application discloses a method for correcting the vision of laser refraction in extremely shallow water, and belongs to the technical field of marine surveying and mapping and underwater detection, and is used for laser refraction correction. The method comprises the following steps: synchronously collecting binocular images and inertial measurement unit attitude data, and generating three-dimensional point clouds; indexing a light spot area in the point clouds according to a laser emission angle, fitting a micro tangent plane, and obtaining an original normal vector of the water surface; calculating a confidence weight according to the image texture definition, and iteratively calculating an optimal estimated normal vector based on the original normal vector and the weight; calculating a real incident angle according to the optimal estimated normal vector and a laser emission direction; calculating a direction vector of underwater refracted light according to Snell's law; and combining the propagation distances of the laser in the air and in the water and the emission origin coordinates, and calculating three-dimensional coordinates of a target point on the water bottom. The application introduces visual confidence, solves the problem of data failure of traditional visual depth measurement when encountering water surface reflection, glare or broken waves, and significantly improves the robustness under complex sea conditions.

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.

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 invention belongs to the technical field of new energy power generation, and relates to a bank wave impact kinetic energy capturing system and an energy storage method.The bank wave impact kinetic energy capturing system comprises a bank wave impact kinetic energy capturing device, a hydraulic workstation, a high-pressure gas storage tank set and a power generator; the hydraulic output end of the hydraulic pump communicates with the hydraulic input end of the hydraulic motor through a hydraulic pipeline, an air outlet of the compressor communicates with an air inlet of the high-pressure air storage tank set, an air outlet of the high-pressure air storage tank set communicates with an air inlet of the expansion machine, an output shaft of the expansion machine is in torque connection with the generator, and the generator is electrically connected to a power grid. According to the invention, a compressed air energy storage mode is adopted, and the mechanical energy of the bank waves is converted into compressed air energy for large-scale centralized storage; according to the electricity demand, the stored high-pressure air energy can be converted into the electric energy for grid-connected power generation at any time, the effectiveness of converting the shock kinetic energy of the bank waves into the electric energy is improved, and the problems that the voltage fluctuation is large and the current is interrupted when the shock kinetic energy of the bank waves is directly converted into the electric energy are solved.

The utility model provides an embankment structure which comprises a lower wave wall and an upper wave wall which are arranged along a water bank, the lower wave wall is arranged close to the water surface, the upper wave wall is located at the inclined upper position of the downstream side of the lower wave wall, a lower layer platform is arranged between the top face of the lower wave wall and the upper wave wall, and an upper layer platform is arranged on the downstream side of the upper wave wall. The lower wave wall is of a vertical wall body structure and comprises a slope protection outer wall, a consolidation wall and a retaining wall which are arranged in sequence, and the slope protection outer wall is arranged in a water facing mode and is of a concave-convex wave-shaped wall body structure. In the utility model, the embankment is provided with the upper layer platform and the lower layer platform, the upper layer platform is correspondingly provided with the upper wave wall, the lower layer platform is correspondingly provided with the lower wave wall, the lower wave wall comprises three layers, namely the slope protection outer wall, the consolidation wall and the retaining wall, and the slope protection outer wall is of a concave-convex wave-shaped wall body structure, so that the influence caused by wave breaking impact is reduced; the firmness and the stability of the embankment are improved.

The invention discloses a coastal polder area engineering construction design water level determination method, which comprises the following steps of: standardly calculating a coastal polder area design rainstorm process and a flow process of catchment of each surrounding hillside, and superposing the design rainstorm and the catchment of the hillside; in combination with the underwater topography of the engineering sea area, the breaking wave height and the significant wave height of each time period corresponding to the same tide level process are compared, and a significant wave height process line is obtained through standard calculation; based on the significant wave height process line, calculating a wave overtopping amount change process according to a seawall engineering design specification, and superposing the wave overtopping amount, a designed rainstorm process and a hillside catchment process to obtain a total runoff production process; sketching a water storage capacity and water level relation graph and a relation table; and iteratively calculating the maximum inland inundation water level of the coastal polder area corresponding to the drainage capacities of different pump stations based on the total runoff production process and the water level relational graph. The method can accurately calculate the designed inland inundation water levels of different pump station drainage capacities in different flood recurrence periods, is low in calculation cost, and meets the economic and safety requirements of engineering construction.

The invention discloses a water wave surface measurement software and hardware system based on multi-line structured light and a monocular camera, and belongs to the technical field of ship wave surface measurement. The method comprises the following steps: building and calibrating a system, arranging a multi-line laser and a monocular camera to form a hardware system, using a checkerboard marker to fix camera parameters and fitting a laser plane equation; water wave image acquisition: acquiring laser stripe images reflected by water waves; preprocessing the image, and enhancing and denoising the image; stripe center extraction and sorting: extracting stripe center coordinates with sub-pixel precision and carrying out clustering sorting to correspond to a laser plane; and three-dimensional wave surface reconstruction: converting the coordinates into three-dimensional points and carrying out interpolation to obtain wave surface morphology data. According to the method, the multi-line structured light is combined with the monocular vision, so that the interference of the broken wave surface is overcome, the problem of feature matching is avoided, and the high-precision and high-robustness measurement of the high-dynamic water wave transient full-field three-dimensional morphology is realized.

The application discloses a kind of ground surface large-scale hydrodynamics simulation simulation methods based on shallow water equation group, belong to the technical field of fluid mechanics, steps include: introducing bed bottom source term, shallow water lattice Boltzmann equation is constructed;Combining single relaxation model constructs dry-wet boundary processing equation;The model to be simulated is constructed, and the calculation domain is set according to the constructed model;Simulation parameters of the model to be simulated are set;The boundary condition of the model to be simulated is set;According to the shallow water lattice Boltzmann equation and dry-wet boundary processing equation constructed, the dynamic phenomenon of the model to be simulated is simulated.The application uses the above method, on the premise of guaranteeing mass-momentum conservation, significantly improves the calculation stability of dam-break wave front, intertidal zone submergence and other dynamic boundary scenarios, and shortens the time consumption of calculation.

The utility model relates to the technical field of abalone culture, and discloses a floating box for abalone culture, which comprises a floating plate, the whole floating plate is circular, both sides of the floating plate are fixedly provided with wave breaking plates for breaking waves, both sides of the floating plate are fixedly provided with inclined connecting rods, and the inclined connecting rods are fixedly connected with the floating plate. The floating device comprises a floating plate and a connecting rod, floating pieces used for floating bearing are fixedly installed at the two ends of the bottom of the connecting rod, the floating device further comprises a row-connecting assembly, the row-connecting assembly is arranged at the top of the floating plate, the row-connecting assembly is used for connecting and fixing the floating boxes on the two sides, and the row-connecting assembly comprises a sleeve rod, an inserting groove and a fixing inserting piece; through mutual cooperation of the structures, the device is stable in structure, convenient to connect and high in wind and wave resistance, can effectively cope with the severe marine environment, improves the abalone culture efficiency and safety, reduces the generation of sea floating garbage, protects the marine ecological environment, and is more practical.

The application discloses a kind of video inside biological physics priori guide's nearshore breaking wave propagation trajectory detection method, wherein the method includes: obtaining shore-based video image, setting across-shore sampling section in video field of view, extracting pixel brightness value along the across-shore sampling section frame by frame and stacking in time sequence, generate space-time stack image;The space-time stack image is analyzed by time sequence statistical characteristics, generate inside biological physics priori;The inside biological physics priori includes breaking wave activity enhancement representation and two-dimensional space priori;Wherein, the breaking wave activity enhancement representation is obtained by standardization image and across-shore breaking wave activity intensity weighting, the two-dimensional space priori is copied along time direction by one-dimensional space priori in across-shore direction, and the one-dimensional space priori is determined based on the across-shore distribution characteristics of breaking wave activity intensity, etc.;The present application can be applied to long-term continuous monitoring of natural beach wave breaking process, breaking wave activity area identification, wave propagation characteristic extraction and the like.

The utility model discloses a kind of simulation water floating rocking ship body devices, belong to the field of recreational facilities. Device includes: ship body, lifting mechanism, compression spring assembly and buoyancy counterweight box assembly;Wherein, ship body is elastically connected on lifting mechanism by compression spring assembly, can be lifted under the drive of lifting mechanism and move back and forth under the action of compression spring assembly;Ship body bottom installs buoyancy counterweight box assembly, realizes the purpose of buoyancy weight reduction to ship body. The ship body device of the utility model combines and uses lifting mechanism and compression spring assembly, realizes the running effect that ship body is up and down in water and moves back and forth, its structure is simple and practical, can be used for similar small boat in water performance occasion of breaking waves with wind.

A wave pool for generating surfable waves is disclosed. The wave pool includes a pool for containing water. The pool defines a channel having a first side wall, a second side wall, and a bottom with a contour that slopes upward from a deep area proximate the first side wall toward a sill defined by the second side wall. The wave pool further includes at least one foil at least partially submerged in the water near the side wall, and being adapted for movement by a moving mechanism in a direction along the side wall for generating a wave in the channel that forms a breaking wave on the sill. The wave pool further includes one or more passive flow control mechanisms to mitigate a mean flow of the water induced by the movement of the at least one foil in the direction along the side wall.