14 results about "Sand wave" patented technology

The invention discloses an indoor water tank sediment pushing characteristic acquisition system and method, the system mainly comprises a water tank main body, a buffer unit, a drainage adjusting unit, a sediment throwing device, an imaging unit, an adjustable support and a data processing unit, and according to the method, non-contact data acquisition is carried out through a high-definition camera and a three-dimensional terrain measuring instrument; automatic identification, parameter extraction and migration speed calculation of landforms such as sand waves are achieved, the sediment bed surface is not touched in the whole process, damage to the bed surface form caused by traditional contact type measurement is eliminated, and the authenticity and reliability of data are ensured. Meanwhile, the buffer design of the combination of the flow slowing plate and the multi-stage water baffle is adopted, the kinetic energy of water flow is effectively dissipated through the graded water outlet structure, the impact force of injected water flow is greatly reduced, the bed surface is prevented from being scoured in the initial water injection stage, and the stability of the initial test condition is powerfully protected.

The invention relates to the technical field of ocean engineering experiments, and discloses a high-precision sand wave form capturing device for an offshore sand wave migration experiment, which comprises a wave water tank, a sand wave form high-precision monitoring system, a flow field synchronous measurement system and a data acquisition and processing system, a sand bed is arranged in the wave water tank, the sand wave form high-precision monitoring system comprises a terrain scanning subsystem and an image acquisition subsystem, and the data acquisition and processing system is used for synchronously acquiring, processing and fusing terrain scanning data, image data and flow field data. Through the sand wave form high-precision monitoring system, the flow field synchronous measurement system and the data acquisition and processing system, the sand wave form is accurately captured, the evolution of the flow field and the sand wave is synchronously monitored, and a coupling mechanism of the flow field and the sand wave is revealed through data fusion analysis; the experimental design is rigorous and controllable, the influence of multiple factors can be systematically researched, and a reliable basis is provided for ocean engineering anti-scouring design.

The invention provides an offshore sand wave coupling pile foundation scouring monitoring system based on a multi-beam echo sounding technology, which belongs to the technical field of offshore pile foundation structure scouring monitoring and comprises a data acquisition module, a data processing and analysis module, a sand wave recognition and feature extraction module, a pile foundation scouring evaluation module and a result output and early warning module. The system further comprises a calibration module and a solidified soil protection material database. According to the system, dynamic evaluation and early warning of scouring pits around piles are achieved through multi-source data collaborative acquisition (multi-beam sounding, layered flow velocity and pile foundation parameters) and precision calibration, coupling hydrodynamic force-scouring simulation (considering pile foundation turbulent flow) and sand wave migration feature extraction; and when the scouring exceeds the threshold value, a protection scheme can be output based on the stabilized soil database. The system solves the problems that traditional monitoring data are isolated, analysis is split and no protection suggestions exist, and monitoring comprehensiveness, predictability and engineering practical value are improved.

The invention relates to the technical field of simulation experiment equipment, in particular to a sand wave simulation test device under an ice cover flow condition, which comprises an experiment table provided with a water tank, a sand wave sequence component arranged at the bottom of the water tank, and an underground reservoir connected with the experiment table; the water circulation assembly is used for driving water flow to circulate in the water tank and the underground reservoir; the ice cover simulation assembly is used for simulating different ice conditions; the rapid replacement assembly comprises a water flow energy storage mechanism and a position adjusting mechanism, the water flow energy storage mechanism is used for storing energy when water flows out of the underground reservoir, and the position adjusting mechanism is used for adjusting the position of the simulated ice cover assembly during use. According to the invention, the position adjusting mechanism and the sand wave sequence design of the rapid replacement assembly support the completion of ice cover form switching in a short time, so that the experiment preparation time is greatly shortened, and the research efficiency is improved.

The invention discloses a pre-embedded bed load sediment transport rate measuring device based on sand wave motion, and the device comprises a measuring module which is used for measuring water pressure and sediment pressure; the pressure sensing module is used for measuring the sum of water pressure and sediment pressure above the inside of the riverbed; the water level measuring module is used for synchronously acquiring water level data; the central processing module is used for extracting sand wave elements including the sand wave height, the sand wave movement speed and the sand wave form coefficient and calculating the bed load sand transport rate; the data transmission module is used for transmitting the bed load sediment transport rate information to a remote terminal; the power supply module is used for supplying power to the pressure sensing module, the water level measuring module, the central processing module and the data transmission module. The method realizes real-time, interference-free and automatic monitoring of the bed load sediment transport rate, has the advantages of high precision, strong adaptability and the like, and is suitable for monitoring the shallow river bed load sediment transport rate.

The application discloses a sand wave surface three-dimensional flow field synchronous detection system and method, which comprises the following steps: obtaining time-synchronous particle image data set and morphological image data set; obtaining initial three-dimensional three-component velocity vector field and corresponding vector confidence field; obtaining three-dimensional three-component velocity vector field after confidence screening and continuity constraint correction; generating a multi-scale turbulent flow feature set; outputting a three-dimensional vortex structure evolution feature set based on vortex structure identification criteria; extracting sand wave profile and sand wave motion parameters based on the morphological image data set, constructing a sand wave surface macroscopic skeleton curve model and a bed surface coordinate system changing with time; obtaining a bed surface registration aligned three-dimensional flow field model; and generating a sand wave surface three-dimensional flow field synchronous detection report. The application realizes true bed surface phase alignment by macroscopic bed surface fluctuation stripping and bed surface phase-flow field phase corresponding relationship establishment, so that flow fields at different time frames can be compared and aligned on the wave peak-valley phase axis.

The invention provides an optical fiber sensing monitoring device and method for local scouring of a pile foundation in an offshore sand wave environment, and belongs to the technical field of offshore engineering monitoring, the device comprises an optical fiber sensing module, a data acquisition unit, a data processing unit and an early warning module, and a sensing-acquisition-processing-early warning automatic closed-loop system is formed; the method comprises the steps of system layout, data acquisition, processing and analysis, early warning release and regular calibration. According to the scheme, the seabed scouring form and the pile body strain are obtained by means of hybrid optical fiber sensing, the precision is improved by combining the Brillouin / Raman scattering technology, numerical simulation assistance and multi-source calibration, active early warning is achieved through trend prediction, the problems that traditional monitoring is scattered, depends on manpower and is low in precision are solved, and the method is suitable for severe offshore unmanned monitoring and has a wide application prospect. And reliable support is provided for safety of the pile foundation.

The invention provides a method and a device for measuring sand wave water depth by using a remote sensing image, and relates to the technical field of optical remote sensing, sand wave morphological parameters are extracted through spectral analysis and are inversed with the water depth, large-range and rapid water depth measurement can be performed by using a multispectral image without depending on traditional acoustic detection, and meanwhile, the method and the device can be applied to the field of water depth measurement. The measurement path is optimized based on the position information value function, path planning in the measurement process is optimized, redundant measurement areas are reduced, and the measurement efficiency is improved; according to the method, a Kriging spatial interpolation algorithm is adopted for error correction, an error estimation surface can be generated based on a residual value of actually-measured high-precision water depth data and inversion data, error correction is performed through pixel-by-pixel algebraic operation, comparison and matching of the actually-measured data and the inversion data are ensured through spatial registration, and the accuracy and accuracy of the data are improved. The problem of application of a traditional remote sensing method in complex water areas and unstable illumination conditions is solved.

The invention relates to the technical field of graphic rendering, in particular to a real-time sand sea rendering method and electronic equipment. Comprising the steps of performing dynamic noise disturbance processing on world coordinates to generate global coordinates of a sand sea; mapping the global coordinate to a periodic local coordinate space to obtain a local coordinate; based on the local coordinates, a sand wave foundation form with adjustable peak features is generated; superposing a plurality of scales of sandwave forms to form a composite sandwave height field; carrying out dynamic fusion on the composite sand wave height field and the terrain height map; and calculating a surface normal based on a fusion result and completing rendering output. The method can be highly fused with elements such as a terrain height map, a mask map and the like on the basis of truly expressing the sand wave flow feeling, and supports multi-scale detail control and performance optimization at the same time. And the requirements of games, movies and televisions and other fields on high-quality landform performance and real-time performance can be met.

The invention discloses a riverbed sand surface morphological characteristic test simulation measurement system under the action of tidal current, which is applied to a riverbed erosion and deposition physical model test. Based on the liftable water spray pipe, a small-capacity movable bed closed box body is formed, the problem that an artificial sand surface is easily eroded and damaged by boundary water flow is effectively solved, sand is dynamically and timely supplemented, and convenient simulation of a river bed sand surface morphological characteristic test under the bidirectional flow condition is realized. Based on combined measurement of sand surface form monitoring equipment such as a near-infrared depth camera and an ultrasonic topography instrument, systematic monitoring of the sand wave form under the non-contact condition is achieved, the characteristics such as the development mechanism, the form and appearance and riverbed resistance distribution of sand waves can be analyzed conveniently, sand wave parameter monitoring is comprehensive, and operation is easy.

The invention discloses a sand wave surface three-dimensional flow field synchronous detection system and method. The method comprises the steps that a particle image data set and a morphological image data set which are synchronous in time sequence are obtained; obtaining an initial three-dimensional three-component velocity vector field and a corresponding vector confidence field; obtaining a three-dimensional three-component velocity vector field after confidence screening and continuity constraint correction; generating a multi-scale turbulence feature set; outputting a three-dimensional vortex structure evolution characteristic set based on a vortex structure identification criterion; extracting a sand wave contour and a sand wave motion parameter based on the morphological image data set, and constructing a sand wave surface macroscopic skeleton curved surface model and a bed surface coordinate system of the sand wave surface changing along with time; a three-dimensional flow field model of bed surface registration and alignment is obtained; and generating a sand wave surface three-dimensional flow field synchronous detection report. According to the method, through macroscopic bed surface fluctuation stripping and establishment of the corresponding relationship between the bed surface phase and the flow field phase, the flow fields of different time frames can be comparably aligned on a wave crest-wave trough phase axis, so that bed surface phase alignment in a real sense is realized.

The application discloses an indoor water tank sediment pushover feature collection system and method, and the system mainly comprises a water tank main body, a buffer unit, a drainage adjusting unit, a sediment feeding device, an imaging unit, an adjustable support and a data processing unit. The method realizes automatic identification, parameter extraction and migration speed calculation of sand wave and other geomorphic forms through non-contact data collection of a high-definition camera and a three-dimensional terrain measuring instrument, does not touch the sediment bed surface in the whole process, eliminates the damage of the traditional contact type measurement to the bed surface form, and ensures the authenticity and reliability of the data. Meanwhile, the buffer design of the slow flow plate combined with the multi-stage water retaining plate effectively dissipates the kinetic energy of the water flow through the hierarchical water outlet structure, greatly reduces the impact force of the injected water flow, avoids the scouring of the bed surface in the initial water injection stage, and effectively protects the stability of the test starting condition.

The application discloses a DRP dense sandstone wave attribute prediction method introducing a mineral boundary constraint, and particularly relates to the field of dense sandstone reservoirs. The original CT data of the dense sandstone is taken as a data source of an original image gray scale histogram. The original image gray scale histogram is preprocessed and threshold segmented to obtain a preliminary multi-component CT image. Mineral boundary recognition is performed based on the preliminary phase subjected to the threshold segmentation processing. The binary image of the segmented mineral components and the boundary is obtained through boundary thinning, adjustment and optimization. The representative volume is selected based on the segmented binary image. The mineral component analysis is performed on the segmentation result in the representative volume. All analysis results are integrated. The wave attribute of the representative dense sandstone multi-component digital core model is simulated through the finite element method and the finite difference method.

The invention discloses a multi-resource sand-forming dam knowledge base construction method and a medium. The method comprises the following steps: obtaining image data of an outcrop area of a sand-forming dam to construct outcrop geologic features; obtaining modern deposition data screening suitability parameters of the sand wave dam; different types of sand-formed wave dam research data are obtained, and the sedimentary microfacies-rock corresponding relation of the different types of sand-formed wave dams is obtained; obtaining macroscopic image data of the sand-formed-wave dam and extracting macroscopic constraints of the sand-formed-wave dam; and simulating a dynamic deposition process formed by the sand-formed-wave dam through a preset model according to the geologic features, the adaptability parameters, the sedimentary microfacies-rock corresponding relationships of the different types of sand-formed-wave dams and the macroscopic constraints of the sand-formed-wave dam, and obtaining parameters in the simulation process for association to obtain a sand-formed-wave dam knowledge base. According to the method, the integrated sand-formed-wave dam knowledge base is constructed based on the multi-resource data, so that the reservoir configuration analysis of the underground sand-formed-wave dam is finer.