68 results about "Sediment particle" patented technology

The invention discloses a bed load particle starting test method and device, and relates to the technical field of hydromechanics, the method comprises the following steps: laying sediment particles in a wave water tank, and adjusting the water flow rate through flow control until the bed surface shear stress is less than the critical shear stress; tracer particles are excited to emit fluorescence through a laser beam, and a camera array is used for synchronously collecting instantaneous flow velocity of a flow field and displacement data of sediment particles; analyzing spatial and temporal distribution characteristics of turbulence energy dissipation and pressure energy dissipation based on a turbulence burst process, and establishing a sediment particle starting mathematical model; experimental data and computational fluid mechanics numerical simulation are combined, and the mathematical model is verified and optimized. According to the technical scheme, the analysis precision and the experimental convergence speed of the sediment starting criterion under the complex hydrodynamic force condition can be remarkably improved, and full-chain efficient cooperation from micromechanical response to macroscopic engineering application is achieved.

The invention discloses an integrated measurement method and system for hydrological elements in a high-salinity and high-sand environment, and relates to the technical field of hydrological monitoring, and the method comprises the steps: correcting the theoretical signal receiving strength of each sonar through an established sound attenuation model, and then calculating an effective signal-to-noise ratio, thereby achieving the measurement of the underwater topography in the high-salinity and high-sand environment. According to the method, a dynamic weight fusion algorithm is adopted to perform data fusion on the water depth data of each sonar to obtain fused water depth data, and an inversion method based on residual error minimization is adopted to perform iterative optimization on model parameters, so that the accuracy is relatively high. When the water velocity and the flow rate are measured in the high-salt and high-sand environment, iterative decoupling is carried out based on the sediment particle motion comprehensive model to obtain the sediment particle velocity, then the water velocity is updated based on the measured apparent velocity and the difference value, and after the updated water velocity is converged, the flow rate is calculated. And the accurate water flow rate can be calculated by combining the flow cross section area. The measurement precision of the unmanned ship on the hydrological elements in the saline-alkali area can be improved.

The invention provides a suspended sediment concentration inversion method capable of resisting particle size interference, which comprises the following steps of: standardizing the original acoustic echo intensity of each observation grid to obtain the standardized volume back scattering intensity; establishing a sonar equation considering the sound wave attenuation of the sediment particles, and performing explicit processing on the sonar equation considering the sound wave attenuation of the sediment particles to obtain an explicit inversion model which resists particle size interference and considers the on-way change of the sediment particle size; and performing model parameter calibration on the explicit inversion model, and performing suspended sediment concentration inversion on the river observation section based on the suspended sediment concentration inversion value of each observation grid. According to the method, the dependence of ADCP inversion of the suspended sediment concentration on suspended sediment particle size distribution is effectively eliminated, and the stability and accuracy of suspended sediment concentration inversion are improved. The particle size interference resistant explicit method can realize continuous and real-time suspended sediment concentration monitoring, and is suitable for various water environments such as rivers, lakes, reservoirs and the like.

The invention provides a method of a deep-sea sediment particle sedimentation rate measuring device based on image processing. The method is used for accurately measuring terminal sedimentation velocities of non-spherical sediment particles with different particle sizes in a simulated deep-sea environment. A particle sedimentation track is dynamically captured through a high-precision image processing technology, and accurate measurement of the non-spherical particle sedimentation rate is realized by dynamically capturing the particle sedimentation track and combining morphological parameter correction and unsteady differential equation verification. According to the method, the limitation of the traditional spherical hypothesis is broken through, errors caused by form complexity are remarkably reduced, and high-reliability data support is provided for environment influence assessment of deep-sea mining activities.

The invention provides a method for evaluating and predicting the internal erosion resuspension amount of submarine sediments under the action of waves, which is based on a mass conservation equation, an erosion constitutive equation and a seepage continuity equation of sediment particles and considers the influence of accumulation of seabed pore water pressure on the internal erosion process of the sediments under the action of the waves. Meanwhile, the influence of seabed soil physical property change caused by internal erosion on the seabed accumulated pore water pressure development process is considered, a seabed accumulated response-internal erosion coupling mathematical model under the wave action is constructed, and a finite element method is used for solving; and the development change of the accumulated pore water pressure, the porosity, the suspended fine particle volume concentration and the eroded fine particle mass of the seabed is obtained. According to the method, the mass of fine particles in the seabed sediment moving outwards along with seepage under the action of waves and the spatio-temporal evolution characteristics and rules of the erosion process in the sediment are quantitatively evaluated, and therefore quantitative prediction analysis can be conducted on the seabed stability and the erosion resuspension characteristics in the seabed sediment.

The invention discloses a riverbed sediment particle analysis method and a related device, and relates to the technical field of hydraulic engineering and sediment testing.The method comprises the steps that firstly, the light intensity penetrating through a preset plane at each moment in a plurality of moments in the riverbed sediment sample sedimentation process is obtained; the preset plane is any one of the horizontal planes except the highest horizontal plane and the lowest horizontal plane in a sample container filled with the riverbed sediment uniformly-mixed suspension, riverbed sediment with different particle sizes in the riverbed sediment sample settles to the preset plane at different settling speeds, and for each particle size, based on the light intensity penetrating through the preset plane at each moment, the light intensity of the riverbed sediment in the riverbed sediment sample is calculated. Calculating to obtain the percentage of the sand weight smaller than the particle size, based on each particle size and the percentage of the sand weight smaller than the particle size, obtaining the grain composition and the grain composition curve, and further calculating the vertical line average grain composition, the section average grain composition and the section average particle size. According to the method, the particle analysis of the riverbed sediment can be accurately completed.

The present invention relates to the field of water control gates, and particularly to a water control gate for cleaning sediment. Existing water control gates will be eroded and worn by sediment particles, resulting in poor sealing effect of the water control gates, and it is difficult to clean the sediment adhering to the bottom of the ditch, resulting in poor sediment cleaning effect. A water control gate for cleaning sediment includes: a fixed frame with a sealing groove, a cover plate fixedly connected to the fixed frame, and a water retaining plate slidably connected in the sealing groove of the fixed frame. When the water retaining plate and the threaded rod move upward, they will drive the sliding frame to move upward. When the water retaining plate moves a certain distance to expose the diversion opening of the diversion ring, the water flow at the bottom of the ditch will drive the deposited sediment to flow when it reaches the other side of the water retaining plate, so that the flowing sediment passes through the diversion holes of the diversion ring. The diversion ring can protect the sealing groove of the fixed frame and the bottom of the water retaining plate, thereby enhancing the sealing effect between the fixed frame and the water retaining plate.

The present invention discloses a sediment interception and treatment system in a plain river network area, which includes a sediment interception tank arranged at the river connection point and the estuary, a conveying pipeline arranged along the river, a pneumatic pump, a treatment device, an automatic control system, and an estuary wetland system. The automatic control system includes a data center, a communication module, and water quality sensors and mud level sensors arranged in the sediment interception tank. The water quality sensors and mud level sensors are connected to the pneumatic pump through the data center via the communication module. The outlet of the treatment device is connected to the estuary wetland system. The sediment interception tank is formed by excavating the bottom sediment of the water body, and a support is arranged in the tank to support the communication module, water quality sensors, and mud level sensors. The present invention utilizes the characteristics of fine sediment particles, high water content, and large fluidity in the plain river network area to achieve automatic and rapid collection, in-depth treatment, and resource utilization of sediment from the river network to the estuary area, reduce the sediment and nutrient load entering the lake, and reduce the risk of eutrophication.

This invention belongs to the field of flash flood and debris flow disaster prevention and mitigation, and provides a method for simulating flash flood and debris flow processes based on rheological evolution characteristics. The method includes the following steps: establishing a generalized numerical model of the target channel; using a CFD-DEM coupled model to simulate the transport process of sediment particles in the generalized numerical model under the action of water flow or debris flow slurry; and, based on the semi-empirical relationship between the drag coefficient and Reynolds number of sediment particles carried by flash floods and debris flows, derived in this invention, realizing real-time adjustment of rheological parameters during the simulated flash flood and debris flow transport process through the bidirectional coupling mechanism of the CFD-DEM coupled model. This invention's method can more realistically simulate the spatial distribution of sediment particles during flash flood and debris flow transport, increasing the accuracy of flash flood and debris flow process simulation, and solving the problem that existing technologies struggle to simulate the rheological evolution phenomenon of flash floods and debris flows caused by changes in volumetric sediment content.

The invention discloses a suspended sediment transportation and reservoir desilting system, and relates to the technical field of hydraulic engineering, the system comprises an acoustic control array module used for forming an acoustic potential well in water above a reservoir bottom sludge layer to capture sediment particle groups in the reservoir bottom sludge layer; the sediment gathering and collecting module is used for collecting sediment particle groups and gathering the sediment particle groups at a sediment gathering target point to form slurry; the control unit is used for generating an acoustic potential well moving path based on the acoustic control array module position information, the reservoir bottom terrain and the sediment collection target point, and is used for controlling emission parameters of the acoustic control array module based on the acoustic potential well and the movement state of the sediment particle population and the concentration of the sediment particle population; according to the invention, non-contact, directional and collaborative transportation of sediment particle groups can be realized, and the sediment particle groups are orderly guided to a collection point, so that low-energy-consumption, low-disturbance, high-efficiency and intelligent dredging operation is realized.

The invention discloses a device and method suitable for simulating the whole process of flocculation and sedimentation of sediment particles in a reservoir area, and belongs to the technical field of flocculation and sedimentation simulation. The device comprises a sediment uniform mixing device, a flocculation generator and a flocculation observation chamber; the silt uniform mixing device is located beside the flocculation generator, the flocculation generator comprises an inner cylinder and an outer cylinder, a water inlet is formed in the top of the flocculation generator, and the inner cylinder is driven by a motor to form water flow between the two cylinders; the flocculation observation chamber is located below the flocculation generator, a separation opening is formed in the top of the flocculation observation chamber, a water drainage opening is formed in the bottom of the flocculation observation chamber, a black background curtain is arranged on the inner wall of the back plate side of the flocculation observation chamber, a laser transmitter is arranged outside the flocculation observation chamber, and a CCD camera is arranged outside the flocculation observation chamber and used for observing the sedimentation process of floccules. According to the invention, the whole process from generation, development to sedimentation of the flocculating constituent is free from disturbance, quantitative simulation and observation can be realized, and a theoretical support is provided for research of reservoir sediment sedimentation and analysis of influence factors.

The application discloses a bridge scour simulation and boundary setting method for SPH water-sand two-phase flow, and comprises the following steps: model construction, including setting a bed sand layer area range and defining an inlet and outlet boundary area range; particle construction, including setting fluid particles and bed sand particles of a flow field area based on a multiphase flow theory, setting soil yield strength based on a HBP model and introducing a DP yield criterion, initializing inlet and outlet boundary particle parameters, setting particle type identification, and setting particle position identification; N-S control equation solving, obtaining corresponding flow force parameter results; entering a sediment solving module, including sediment particle conversion and viscosity updating calculation; entering an inlet and outlet boundary updating module, including inlet and outlet particle position retrieval, particle type conversion, and particle supplement and deletion; completing a calculation cycle and entering the next cycle; through secondary development based on the SPH multiphase flow theory, the application can realize numerical simulation of foundation local scour by applying the inlet and outlet boundaries to the multiphase flow model and introducing various structure and state models.

The invention discloses a wetland nitrogen cycle optimization method and system based on machine learning, and belongs to the technical field of ecological engineering.The method comprises the steps that according to a comprehensive environment data set, a transverse lateral infiltration path and a vertical priority flow path are recognized, spatio-temporal evolution simulation is conducted through a cellular automaton model, and a nitrogen migration path is constructed; analyzing the interaction between the water flow driving flux and the underground water level on the path resistance, and determining the broadening degree of the transverse lateral seepage path; if the widening degree exceeds a preset threshold value, integrating the water body turbulence intensity data and the flow velocity shear effect value, and obtaining a bubble escape rate and a surface sediment disturbance frequency; calculating the nitrogen saturation and the spatial distribution of the sediment particle suspension amount, and obtaining the total re-release flux through flux overlay analysis; and constructing a nitrogen loss flux model in combination with the fluctuation rule, simulating the change of the nitrogen loss proportion, and determining the net nitrogen loss flux. According to the invention, fine monitoring of the dynamic change of wetland nitrogen can be realized.

The invention discloses a filtering device for slowing down plume discharge of deep-sea mining tail water and a use method thereof.The filtering device comprises a water inlet pipeline, a water outlet pipeline, a filtering system and a filter residue treatment system used for storing filter residues and discharging the filter residues, and the filtering system comprises a filtering assembly; the filter assembly is arranged at the joint of the water inlet pipeline and the water outlet pipeline, the edge of the filter assembly extends into the filter residue treatment system, and the filter residue treatment system is communicated with the water inlet pipeline. According to the filtering device for slowing down plume discharge of deep-sea mining tail water, the filtering system is arranged between the water inlet pipeline and the water outlet pipeline, and the filter residue treatment system is arranged in a matched mode, so that solid-liquid separation can be effectively conducted on sediment particles and seawater, filtering and filter residue storage are synchronously conducted, discharge of the sediment particles is reduced, and the service life of the filtering device is prolonged. And plume formation can be effectively slowed down, and the influence on the marine environment is reduced.

The present invention relates to the technical field of sediment monitoring equipment, and discloses an online pipeline particle monitoring device based on the electrostatic principle, which solves the problem of low monitoring accuracy. The device comprises a sediment pipeline, wherein two boreholes are provided at the lower end of the sediment pipeline, a reversing pipe is provided at the bottom of each borehole, a water inlet pipe is provided at the bottom of the reversing pipe at the left end, a booster pump is fixed at the bottom of the water inlet pipe, a sediment particle electrostatic sensor is fixed at the right end of the booster pump, a telescopic tube is fixed at the right end of the sediment particle electrostatic sensor, an adapter tube is slidably connected to the outside of the telescopic tube, a water outlet pipe is fixed at the right end of the adapter tube, and a sampling tube is provided at the bottom of the water outlet pipe. Due to the electrostatic attraction effect, the present invention transmits the signal to a host computer after signal conditioning inside a fixing ring of the induction tube for online monitoring, and outputs an induced charge output amplitude change curve and a signal waveform diagram, thereby realizing real-time monitoring and ensuring the accuracy of monitoring.

The invention provides an ancient coastal sand dam prediction method and device, equipment and a medium, and relates to the technical field of oil-gas exploration. Comprising the following steps: acquiring fluctuation data of an ancient landform in a region, wave mark parameters in sedimentary rock, sediment particle diameter and sediment density; according to the fluctuation data of the ancient landform, determining the gradient of the ancient landform of the region; determining the sedimentary paleo-water depth according to the wave mark parameter, the sediment particle diameter and the sediment density in the sedimentary rock; and the thickness of the ancient coastal sand dam is determined according to the paleo-terrain gradient and the sedimentary paleo-water depth. According to the method, the thickness of the paleo-coastal sand dam is determined by analyzing the paleo-terrain gradient and the sedimentary paleo-water depth in the area, the potential reservoir in the area is rapidly identified in the early stage of exploration, and a basis is provided for well drilling deployment.

The application relates to the technical field of salt rock underground storage, in particular to a salt rock storage water-soluble cavity sediment accumulation angle prediction method. The method comprises the following steps: preparing at least four groups of sediment samples according to different particle sizes; obtaining average particle parameters and average accumulation angles of the sediment samples; obtaining an initial prediction formula of the accumulation angle, wherein the initial prediction formula of the accumulation angle comprises four prediction parameters; calculating the prediction parameters according to the average particle parameters and the average accumulation angles, and determining an accumulation angle prediction formula, so as to realize the prediction of the sediment accumulation angle. The application solves the problems that the sediment particle accumulation angle is not easy to measure and is not accurately measured, improves the transparency of the underground sediment particle accumulation, and can be used not only for analyzing the dynamic accumulation angle change process of the salt cavity bottom sediment particles in the water-soluble cavity forming process, but also for predicting the sediment accumulation situation at the bottom of the unexplored salt cave.

A production apparatus for a shaped body containing sedimenting particles and a method for producing a shaped body containing sedimenting particles that can continuously mass-produce shaped bodies containing a fixed amount of sedimenting particles. A production apparatus for a shaped body containing sedimenting particles, the apparatus being provided with an ejection head that ejects a liquid containing sedimenting particles, as a liquid droplet, onto a droplet landing element, and a supply apparatus that supplies the liquid to the ejection head, wherein the supply apparatus includes a storage module that extends in a direction transverse to the vertical direction and that stores the liquid, a supply module that supplies the liquid in the storage module from one end in a central axis direction of the storage module, and an agitation unit that rotates the storage module in a circumferential direction about the central axis of the storage module to agitate the liquid inside the storage module.

The utility model relates to collecting device technical field especially, it relates to a sediment interface water in situ collection device with prevent blocking microfiltration head. The utility model provides such a sediment interface water in situ collection device with prevent blocking microfiltration head, including cylinder, water outlet pipe, valve, screen, threaded block, first suspension ball, counterweight, motor and rotating frame, the cylinder is hollow column, and its upper portion outside is spaced apart and is equipped with a plurality of water inlets along the circumference, and the lower left side of cylinder is connected and is communicated with water outlet pipe, and the valve is installed on water outlet pipe, and the screen is detachably connected with the upper side in the cylinder. Through screen filtration sampling water, effectively block sediment particle and macromolecular impurity, cooperate motor drive's rotating frame, can remove flocculent pollutant, biological membrane etc. blocking object on the surface of screen in real time, solve the problem that traditional screen is easy to block.

The present invention provides a method for evaluating and predicting the amount of internal erosion and resuspension of seabed sediments under wave action. Based on the mass conservation equation for sediment particles, the erosion constitutive equation, and the seepage continuity equation, this method considers the impact of the accumulation of seabed pore-water pressure under wave action on the internal erosion process of sediments. It also considers the impact of changes in the physical properties of seabed soil caused by internal erosion on the development of the cumulative pore-water pressure of the seabed. A coupled mathematical model of the cumulative response of the seabed under wave action and internal erosion is constructed. The model is solved using the finite element method to obtain the development and changes in the cumulative pore-water pressure, porosity, volume concentration of suspended fine particles, and the mass of eroded fine particles. The present invention quantitatively assesses the mass of fine particles within seabed sediments that migrate outward with seepage under wave action, as well as the spatiotemporal evolution characteristics and patterns of the internal erosion process of sediments. This allows for quantitative prediction and analysis of seabed stability and the internal erosion and resuspension characteristics of seabed sediments.

This invention relates to the field of sediment and water sample filtration technology, specifically to a high-efficiency and environmentally friendly automatic sediment and water sample filtration cabinet. It includes a cabinet body and multiple filtration devices. Two doors are rotatably connected to the surface of the cabinet body. Multiple water sample bottles are inserted inside the cabinet body. The multiple filtration devices are located inside the cabinet body, each filtration device including a support plate fixedly connected to the inside of the cabinet body. The water sample bottles are inserted inside the support plate. A connecting plate is inserted inside the cabinet body, and multiple filter papers are inserted inside the connecting plate, positioned directly below the water sample bottles. A fixing plate is fixedly connected inside the cabinet body. Through the parallel design of multiple water sample bottles, multiple filter papers, and multiple containers, dozens or even hundreds of water samples can be filtered simultaneously, thereby improving processing efficiency. The high-frequency micro-vibration generated by the vibration motor is transmitted to the filter paper through the connecting plate, which can disperse the sediment particles accumulated on the filter paper in real time, reducing sediment adsorption and clogging of the filter paper pores.

The invention discloses a river suspended sediment concentration measurement method and equipment, and the method comprises the steps: taking a region non-local diffusion equation based on a near-field dynamics differential operator as a core to carry out profile inversion, and carrying out the measurement of the suspended sediment concentration through a predefined weight function and a finite interaction domain; bridging is achieved between a local Rouse model and a global fractional order model, and the physical constraint that sediment particles cannot be instantly sent to the free water surface in a near-bed turbulence event is met, so that the full-water-depth suspended sediment concentration is reconstructed through a small number of actual measurement points. The river suspended sediment concentration measuring method provided by the invention better conforms to the actual distribution condition of suspended sediment in a natural river, the obtained result is more accurate, and further scientific guidance can be provided for engineering sediment measurement.

The invention relates to the technical field of sediment detection equipment, in particular to sediment thickness detection equipment for foundation construction, which comprises a moving device, a regulation and control device arranged in the moving device, a lowering device arranged at the top of the moving device and a detection probe arranged on the outer side of the lowering device, the moving device comprises a fixed frame body, rotating wheels arranged at the corners of the outer side wall of the fixed frame body and two sets of downward pressing parts arranged in the fixed frame body. The position, making contact with the top face of the pull-down frame, of the cam continuously changes in the rotating process of the rotating shaft, then the traction rope is discontinuously pulled down through the pull-down pulley, manual work is simulated, the detection probe discontinuously moves upwards in the downward moving process, certain disturbance is generated when the detection probe is lowered, and the detection accuracy is improved. Therefore, the probe is prevented from being blocked by sediment particles, and the probe is ensured to be more accurately lowered to the top surface of the sediment layer while the jamming phenomenon is prevented.

The application discloses a suspended sediment transport and reservoir dredging system, and relates to the technical field of hydraulic engineering.The system comprises an acoustic control array module, a sediment collection module and a control unit.The acoustic control array module is used for forming an acoustic potential well in water above a reservoir bottom silt layer to capture a sediment particle group in the reservoir bottom silt layer; the sediment collection module is used for collecting the sediment particle group to gather at a sediment collection target point to form a slurry; and the control unit is used for generating an acoustic potential well moving path based on position information of the acoustic control array module, a reservoir bottom topography and the sediment collection target point, and for controlling emission parameters of the acoustic control array module based on a motion state of the acoustic potential well and the sediment particle group and a concentration of the sediment particle group.The application can realize non-contact, directional and cooperative transport of the sediment particle group, orderly guide the sediment particle group to a collection point, and realize low-energy-consumption, low-disturbance, high-efficiency and intelligent dredging operation.

The present invention belongs to the technical field of oil and gas resource exploration and discloses a classification method, system, medium, equipment, and terminal for fine-grained sedimentary particles. Based on multi-scale, multi-field scanning electron microscopy identification technology, the microstructural images of fine-grained sedimentary rocks are spliced ​​and identified using FE-SEM. The identified images are then grayscale processed using ImageJ software to determine the microstructural characteristic parameters of the fine-grained sedimentary particles. Nanoindentation experiments are used to measure the micromechanical properties of the fine-grained sedimentary particles, including hardness and elastic modulus. A five-unit characterization method is constructed using particle size, flatness, angularity, elastic modulus, and hardness to determine the characteristics of the fine-grained sedimentary particles. Based on the principle of the five basic properties of fine-grained sedimentary particles, the combination types of fine-grained sedimentary particles are classified. The novel image analysis technology of the present invention is more comprehensive and intuitive than local observation under a scanning electron microscope, providing new ideas for quantitative characterization and qualitative analysis of microstructures.

The present invention discloses a method for measuring the turbulence intensity of sediment-laden water flow in a sediment environment and its model. The model includes a water flow control system and a measurement system. The method includes determining the model input conditions, including the range of values ​​of sediment content and median sediment particle size; debugging and running the model, regulating the water flow control system, and measuring the water depth and flow velocity data of the model section; determining the model experimental conditions based on the uniform flow-turbulent flow-slow flow mode; collecting test data, measuring the pulsating pressure of the water flow at each measuring point; processing the collected test data, and outputting a quantitative index of the turbulence intensity of the sediment-laden water flow. The present invention replaces the pulsating flow velocity with the pulsating pressure as a quantitative index of the turbulence intensity of the sediment-laden water flow, while ensuring the measurement accuracy, not only improving the calculation efficiency, but also breaking through the technical bottleneck of high sediment content and extremely fine sediment particles, and providing certain technical support for conducting physical model test research on the turbulence characteristics of sediment-laden water flow, especially high sediment content water flow.

The application discloses a sediment particle impact test device and a test method thereof, and relates to the technical field of sediment impact tests.The device comprises a first container for storing a fluid, a second container with at least one transparent surface for observing test phenomena, a connecting pipe with a first end in communication with the first container and a second end in communication with the second container, a driving device for conveying the fluid in the connecting pipe from the first end to the second end, and a sediment injection device for adding sediment to the inside of the connecting pipe.The device enables sediment particles to impact in the fluid in the second container, the second container with the transparent surface facilitates observation and recording of test results, and is beneficial to relevant personnel to explore the mechanical law mechanism of the sediment particles after impacting in the fluid.

The present invention belongs to the technical field of monitoring the particle size of sediment particles, and in particular, relates to a sediment particle size monitoring device for monitoring river flow, comprising a conical tube, at least three conical tubes are installed in sequence from left to right, the outer tube wall of the conical tubes installed in sequence from left to right is designed to be non-contact with the other outer tube wall, the mesh formed by the tube wall of the conical tube on the left is located inside the conical tube on the right, and the diameters of the mesh holes opened on the tube walls of the three conical tubes decrease in sequence from left to right, a particle size monitoring component is detachably installed at the tube mouth of the leftmost conical tube through a supporting mechanism, and at least three conical tubes are installed in a river channel to be monitored by supporting a sedimentation component; the monitoring device of the present invention can not only monitor the particle size of the mixed sediment particles in the river, but also collect and sample the monitored sediment particles in a graded manner, thereby improving the application scope of the monitoring device of the present invention.

The embodiment of the present application discloses a method, device, equipment and medium for determining riverbed deformation elevation, which relates to the technical field of water conservancy engineering. It includes: determining the friction barrier parameters of the riverbed sediment in the river to be measured relative to the water flow interface at different scouring times according to the river depth, cylinder Reynolds number, cylinder radius, riverbed sediment radius and riverbed sediment density of the river to be measured; determining the friction barrier critical value according to the sediment repose angle of the river to be measured and the water flow direction at the riverbed; determining the scouring mode corresponding to each friction barrier parameter according to the relative size of each friction barrier parameter and the friction barrier critical value; using the corresponding proportion determination method of the corresponding scouring mode to determine the proportion of moving sediment particles corresponding to each friction barrier parameter at different scouring times; determining the riverbed deformation elevation of the river to be measured at the corresponding scouring time according to the proportion of moving sediment particles at different scouring times. This technical solution improves the accuracy of the riverbed deformation elevation.

The application provides a kind of based on scanning electron microscope image deep-sea sediment particle three-dimensional structure reconstruction method: obtain the scanning electron microscope image of deep-sea sediment particle and carry out gray scale, filtering and contrast enhancement;Based on automatic threshold segmentation and connected domain analysis lock target particle area, and synchronous cutting gray scale and binary image;To target particle binary mask is maximum connected domain reservation, hole filling and size standardization processing;Gray value is mapped to relative height and shield background area, generate only cover target particle height field;Based on the height field generates multi-view three-dimensional graph, color height distribution graph, center profile, error band, local refinement reconstruction graph and height classification graph.Through the technical scheme of the application, the efficiency and stability of particle morphology contrast analysis can be improved without changing the existing scanning electron microscope hardware, realizing the automatic extraction, background shielding, three-dimensional morphology reconstruction and quantitative expression of deep-sea sediment particles in a single SEM image.