17 results about "Sediment particle size" patented technology

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.

This utility model relates to the field of sediment separation technology and discloses a cyclone device for sediment separation, including a cyclone separator body and a switching disc. The switching disc has multiple discharge holes arranged in a circular array, each discharge hole containing a screen. The bottom end of each discharge hole is provided with a guide cylinder and an adjusting component, the guide cylinder changing direction via the adjusting component. A rotating component connects the switching disc and the cyclone separator body and is used to rotate the switching disc, switching different discharge holes to the discharge end of the cyclone separator body. This utility model allows for quick and convenient switching of screens with different apertures via the rotating component. Based on the required sediment particle size, the controller starts the motor, driving the switching disc to rotate, aligning the corresponding discharge hole with the discharge end of the cyclone separator body. The entire process is automated, reducing manual intervention and improving screening efficiency.

The invention belongs to the technical field of sand content detection, and particularly relates to a self-adaptive suspension water flow sand content measuring device and method. A lifting buoy; an air bag is arranged at the upper part in the lifting buoy; the air bag is connected with the air supply unit, and the air supply unit performs inflation and deflation control so as to control the sinking and floating position of the lifting buoy on the water surface; a grating detector, a lens and a light source are arranged in the sand content measuring cylinder, and the light source irradiates the grating detector through the lens; a water pressure gauge is mounted on the sand content measuring cylinder; and a controller. According to the scheme, through inflation and deflation control of the air bag, stable suspension and self-adaptive positioning of the equipment at the specified depth in water flow are achieved; the problems of data distortion and high maintenance cost caused by the sensor are avoided; the grating sensor is used for directly obtaining the weight and the sand content of water flow and detailed sand grain grading distribution data in a long time and high precision mode, and the bottleneck that a traditional indirect measuring method is greatly interfered by sand characteristics is broken through.

The invention relates to a wet-type rotary precise sample separation device and method for marine sediment particle size analysis. The wet-type rotary precise sample separation device comprises an anti-sedimentation sample injection unit, a rotary sample separation unit and a driving unit, the anti-sedimentation sample introduction unit comprises a sample introduction funnel and a dynamic homogenizer arranged in the sample introduction funnel, and a liquid outlet is formed in the bottom of the sample introduction funnel; the rotary sample separation unit is positioned below a liquid outlet of the anti-sedimentation sample injection unit and comprises a distribution disc capable of rotating around a vertical axis, and at least two stations for accommodating receiving containers are arranged on the distribution disc along the circumferential direction; and the driving unit is in transmission connection with the distribution disc and is used for driving the distribution disc to rotate. The device is compact in structure, easy and convenient to operate and high in sample separation precision, the influence of gravity sedimentation on sampling uniformity can be overcome in a mechanical mode, and it is ensured that each trace sample separated from original suspension liquid is highly consistent with an original sample in particle size composition, so that the requirement for high-precision laser particle size analysis is met.

The present application provides a kind of phosphorus transport and distribution calculation method based on suspended sediment settling probability, comprising the following steps: selecting a typical section, field determination section sediment particle size distribution, sediment concentration and water velocity;According to the sediment concentration, etc., the settling velocity of single-component sediment is calculated and checked, and the settling velocity of full particle size suspended sediment is obtained by particle size distribution composition;According to the settling velocity of sediment and the sediment settling probability function, the particle state phosphorus transport trajectory is analyzed;Based on the phase separation model, the functional relationship between different particle size groups of sediment, i.e. different sediment concentrations and adsorption phase phosphorus is determined through laboratory experiment;The sediment particle size distribution grouping information and the settling velocity of full particle size suspended sediment are introduced into the hydrodynamic water quality model to analyze the transport process and distribution characteristics of particle phosphorus and dissolved phase phosphorus. This method realizes the numerical analysis of the particle phosphorus transport trajectory, settling velocity and solid-liquid two-phase distribution of full particle size sediment.

The invention discloses a lake basin deepwater fine-grained sediment source analysis method and device, and the method comprises the steps: obtaining sedimentary microfacies recognition result data of a rock core sample of a to-be-detected lake basin region, and generating a sedimentary microfacies profile map of a single well high-frequency sequence; obtaining the fragment zircon age distribution in the fine grain sediment; utilizing the sedimentary microfacies profile map and the detrital zircon age distribution to determine the source associated information of the fine-grained sediment in the same deposition time period; the source associated information comprises fine-grained sediments from the same source; carrying out paleo-landform reduction analysis, paleo-water depth reduction analysis and sediment particle size distribution analysis on the lake basin area to be detected, and outputting sediment carrying characteristic data and sediment distribution characteristic data; based on the object source correlation information, the sediment carrying characteristic data and the deposition distribution characteristic data, density flow deposition body distribution characteristics are analyzed through a well seismic isochronous profile, and a deposition microfacies distribution diagram is output. According to the method, lake basin deepwater fine particle mixed deposition superposed material sources can be distinguished.

The method for tracing a sediment source, including: sampling at sampling points and multiple additional testing points around each sampling point; measuring sediment grain size distribution and corresponding mass percentages to plot sediment grain size distribution curves of each sampling point and its additional testing points; plotting a sediment fingerprint matrix of each sampling point; comparing patterns of the sediment fingerprint matrix of the first sampling point with patterns of the sediment fingerprint matrix of the second sampling point, and determining whether sediment at the first sampling point and that at the second sampling point have the same source. The sediment fingerprint matrix that illustrates the variation of sediment characteristics in different grain size intervals. In addition, by comparing the sediment characteristics in the corresponding grain size intervals, the tracing and classification of sediment from different locations can be achieved.

The method for tracing a sediment source, including: sampling at sampling points and multiple additional testing points around each sampling point; measuring sediment grain size distribution and corresponding mass percentages to plot sediment grain size distribution curves of each sampling point and its additional testing points; plotting a sediment fingerprint matrix of each sampling point; comparing patterns of the sediment fingerprint matrix of the first sampling point with patterns of the sediment fingerprint matrix of the second sampling point, and determining whether sediment at the first sampling point and that at the second sampling point have the same source. The present disclosure provides the sediment fingerprint matrix that illustrates the variation of sediment characteristics in different grain size intervals. In addition, by comparing the sediment characteristics in the corresponding grain size intervals, the precise tracing and classification of sediment from different locations can be achieved.

This invention relates to the field of riverbed sediment measurement technology, and in particular to an image-based method, apparatus, equipment, and computer storage medium for riverbed sediment measurement. Under conditions where low-altitude drone flight is possible, this invention acquires images of the target riverbed sediment sampled by the drone at an altitude below the maximum flight altitude of a first drone, and then performs sediment particle size detection. Under conditions where low-altitude drone flight is not possible, it acquires images of the target riverbed sediment sampled by the drone at an altitude below the maximum flight altitude of a second drone, and inputs these images into a target sediment image super-resolution model to obtain a target super-resolution riverbed sediment image, which is then used for sediment particle size detection. This invention effectively improves the accuracy of riverbed sediment measurement.

The application discloses a kind of asphaltene agglomerated deposition particles and deposition thickness test method and equipment, under the condition of setting temperature, crude oil and settling agent are mixed, the mixture after mixing gradually enters sample tube, when mixture fills test tube, crude oil is injected into sample tube at different flow rates respectively, the inlet pressure and outlet pressure of sample tube are recorded in real time;The pressure difference of sample tube is calculated, and the deposition thickness of asphaltene in crude oil under different flow rates is calculated in real time based on the pressure difference of sample tube;When experiment ends, the deposit in mixed liquid is collected, the initial particle size of deposit in mixed liquid is obtained, the residual liquid in sample tube is replaced, the deposit precipitated in sample tube is dried and collected, and the particle size of the deposit collected at this time is obtained, the method can obtain the deposition thickness and the particle size of deposition particles of asphaltene in deposited crude oil under different flow rates, which is convenient for predicting the size of asphaltene agglomerated deposition particles and deposition thickness in application.

The application discloses a reservoir sedimentation risk two-dimensional evaluation method, comprising the following steps: determining reservoir sedimentation risk evaluation indexes; evaluating reservoir sedimentation present situation; evaluating reservoir sedimentation future development trend; constructing a reservoir sedimentation risk two-dimensional evaluation graph, evaluating reservoir sedimentation risk zoning; analyzing reservoir sedimentation risk regional characteristics; determining reservoir sedimentation risk control measures and engineering quantity schemes. The application comprehensively considers factors such as reservoir sedimentation amount, incoming water and sediment conditions, sediment particle size distribution and slope, quantitatively evaluates reservoir sedimentation risk from two aspects of reservoir sedimentation present situation and future development trend, accurately identifies reservoir groups with the most urgent needs of sedimentation control and reservoir capacity recovery, and gives reservoir sedimentation risk control schemes, which are important bases for reservoir sedimentation control and function recovery.

The application provides a deep-sea sediment washing and screening device capable of monitoring concentration changes and a working method thereof, which comprises, from top to bottom, a mud pretreatment system, a washing and screening system, a vibrating base and a PLC controller. The washing and screening system has a four-layer structure, from top to bottom, three-layer screening cages and a discharging layer, which are connected through flanges. The screening cage comprises, from top to bottom, a screening cage top cover, a sample treatment layer, a sample collection layer and a sample recycling device. Through the technical scheme, the time required for the experiment is greatly reduced through the highly automated vibrating screening system. The deep-sea sediment washing and screening device capable of monitoring concentration changes is provided, and efficient and standardized sediment treatment can be achieved. The improvement of the washing and screening technology of deep-sea sediments improves the working efficiency and accuracy of sediment particle size analysis, which has a positive significance for clarifying the source of seabed sediments, explaining sediment differentiation and determining the sediment environment.

The invention belongs to the technical field of sediment monitoring, and particularly relates to a sediment particle size monitoring device and method under the ice cover flow condition, the sediment particle size monitoring device comprises a mounting frame, positioning plates are symmetrically and fixedly mounted at the bottom of the mounting frame, guide rails are symmetrically and fixedly mounted on the vertical section of the mounting frame, and translation blocks are symmetrically and slidably mounted on the inner walls of the guide rails; the translation blocks on the same side form a group, a sliding column is fixedly mounted between the translation blocks in each group, a monitoring assembly is arranged on one side of one translation block in each group, and an adjusting assembly is arranged on the inner side of the mounting frame. By adjusting the position of the monitoring assembly, the monitoring area can be flexibly adjusted according to different monitoring requirements, so that the monitoring assembly can be used for monitoring a water area with more representative sediment particle distribution, and more representative monitoring data can be obtained, so that the sediment particle size data can be more accurately and comprehensively obtained; the monitoring result deviation caused by the fixed monitoring position is avoided, and the scientificity and the reliability of the monitoring data are improved.

The invention provides a reservoir siltation sediment particle size and sound wave penetrability inversion model determination method, which comprises the following steps of: determining a reservoir siltation section through river sections in different periods; through the sediment sediment particle size data set, sediment particle size data of a reservoir sediment section and a cleaning non-sediment section are combined; determining the sound wave penetration thickness according to the sound wave upper edge and lower edge data in the sound wave data set; therefore, a data set of the sound wave penetration thickness and the average particle size of the corresponding deposited sediment is formed, models of the sound wave penetration thickness and the corresponding deposited sediment are established, and model evaluation is performed by using decision coefficients.

The invention discloses a sediment particle size analysis screen analysis method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a first particle size of first sieved powder; determining at least one screen size according to the first particle size, and determining at least one first mass; performing vibration screening on the first screened powder according to a screen mesh, and weighing to obtain second mass; a first mass fraction is determined from the at least one first mass and the second mass. According to the method, the screen is selected according to the first particle size, the first screened powder is weighed according to the selected screen, and the mass fractions of the particles with different particle sizes in the sediment are determined according to the obtained mass, so that automatic weighing can be realized, and meanwhile, due to direct weighing, the particles do not need to be replaced by a weighing tray, and the weighing efficiency is improved. The problem of particle loss generated in the weighing process is avoided, and accurate data basis and higher test efficiency are provided for content analysis of sediments while the accuracy of quality acquisition is improved.

The invention relates to the technical field of monitoring systems, in particular to a method and system for analyzing the influence of coast engineering on biodiversity. Comprising the following steps: acquiring microtopography parameters, water salinity parameters, substrate parameters and biological larva attachment parameters of a coast engineering area in real time through a sensor module; the microtopography parameters comprise engineering structure height, sediment median particle size, tidal cycle and intertidal zone average water depth, the water body salinity parameters comprise initial salinity and water body temperature before engineering, the substrate parameters comprise substrate initial organic carbon content and porosity, and the biological larva attachment parameters comprise larva attachment base effective area; the collected parameters are input into a data processing module, and the data processing module sequentially calculates the microtopography disturbance intensity, the salinity layering intensity, the substrate organic carbon mineralization rate and the larva attachment success rate based on a microtopography salinity substrate cascade effect model; the method can adapt to complex terrains and dynamic environments, and efficient data processing and stable operation are achieved.

The present application relates to a system and method for simulating the response of oxygen-rich and sticky sediment fish eggs hatching under sediment deposition, comprising a water storage tank, a water pump, and an incubation tank. The incubation tank includes an incubation tank body, at least one water flow channel as a working condition area separated by a water-tight partition in the incubation tank body, a respective water outlet at the other end of each flow channel, at least one incubation box arranged along the flow direction above the egg gravel in the flow channel, egg gravel laid at the bottom, and sediment laid on the egg gravel, with the egg gravel and sediment immersed in water maintaining a certain flow rate. The present application simulates the oxygen-rich process of natural river channels through the water flow channel, simulates the bottom material of the natural environment by laying egg gravel at the bottom of the incubation box, and sets fish eggs and sediment on the egg gravel, allowing the sediment and fish eggs to naturally deposit in the egg gravel. The present application can simulate the influence of real sediment deposition on fish egg hatching, not only qualitatively observing the influence of sediment deposition on fish egg hatching, but also observing the influence of sediment particle size deposition on the hatching mechanism of fish eggs.