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42 results about "River ice" patented technology
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Drill tool and method for measuring thicknesses of sea ice and river ice while drilling
InactiveCN103321567AImprove the efficiency of thickness measurementReduce labor intensitySurveyConstructionsMeasuring instrumentDisplay device
The invention discloses a drill tool and a method for measuring the thicknesses of sea ice and river ice while drilling. The drill tool comprises a display, a detection control unit, a direct-current motor, a screw drill pipe, a drill bit and a storage battery. A PLC (programmable logic control) module is integrated inside the detection control unit and can collect data measured by a torque sensor and a laser distance measuring instrument, and the drilling torque of the drill pipe and the thickness of an ice layer can be displayed via the display on the upper side of the detection control unit. The drill tool and the method have the advantages that drilling machines and tools can be effectively combined with measurement-while-drilling and automatic detection control measures, the data of the thickness of the sea ice can be acquired in a drilling procedure and can be displayed via the display, accordingly, the sea ice and river ice thickness measuring efficiency is greatly improved, and the labor intensity is reduced; the data are acquired and processed by the PLC module, and sudden change values can be adjusted according to different properties of ice of different regions, so that the detection method is excellent in practicality and applicability when applied to large regions.
Owner:JILIN UNIV
Dual-system ice layer thickness measuring device
ActiveCN102679861AReduce intermediate conversion linksHigh measurement accuracyElectrical/magnetic thickness measurementsHydrometryMeasurement device
The invention relates to a dual-system ice layer thickness measuring device and belongs to the technical field of automatic detection. The measuring device has high precision and high durability, is mainly applied to the technical fields of water conservancy, hydrology and the like and is used for the automatic detection on the icing ice layer thickness of river ice, lake ice and sea ice. The dual-system ice layer thickness measuring device is characterized in that the measuring device belongs to the dual-system ice layer thickness measuring device for high-precision forecasting of water conservancy and hydrology ice conditions, and the whole set of measuring device consists of two parts including a transmission system and a measuring system. The dual systems are characterized in that the transmission system consists of two sets of identical lead screw transmission systems which are respectively a front transmission system and a back transmission system, the measuring precision of the measuring device is higher and can reach + / -2mm, and the measuring device belongs to an automatic monitoring device. The measuring device has the advantages that the measuring method is intuitional and is similar to the most common clamping measuring method (such as a caliper rule and a micrometer) in the mechanical industry, and the high-precision measurement of the ice layer thickness is realized. The dual-system ice layer thickness measuring device is suitable for the automatic measurement of the ice layer thickness of nearshore sea ice and riverway river ice or lake ice around a hydrological station.
Owner:TAIYUAN UNIV OF TECH
Bubble ice breaking method
ActiveCN106917392AAvoid damageLow costWater cleaningIce breakersStructure of the EarthMarine engineering
The invention belongs to the technical field of ocean and inland river ice breaking, and particularly relates to a bubble ice breaking method. A bubble generating device is used for pulsation bubbles at the position, vertically away from an ice layer by D, below the ice layer, D is larger than 0 and smaller than 2R, R is the maximum radius capable of being reached by the bubbles generated by the bubble generating device under the situations that the water depth is the same, and the ice layer does not exist, the near ice layer is damaged through the movement of underwater movable bubbles, and ice breaking is conducted; one or more bubbles are generated in water, the bubbles are expanded and then contracted, and ice layer damage is caused through at least one of the following four forms. According to the bubble ice breaking method, designing and manufacturing of an ice breaker are not needed, throwing of bombs, explosives and the like is not needed, and cost is saved; a mechanical structure does not directly collide with the ice, and damage of a ship body or a machine is avoided; and substances such as the explosives do not need to be used, explosion pollutants are avoided, and the bubble ice breaking method is more environment-friendly and safer.
Owner:HARBIN ENG UNIV
Cooperated detecting method for ice of The Yellow River based on multispectral image and SAR image
ActiveCN105913023AQuick checkEfficient detectionImage enhancementImage analysisMultispectral imageSuperpixel segmentation
The invention discloses a cooperated detecting method for ice of The Yellow River based on a multispectral image and an SAR image, wherein the cooperated detecting method is used for settling a technical problem of low precision in existing detecting methods for the ice of The Yellow River. The cooperated detecting method is characterized in that a remote sensing image is used; through performing preprocessing such as geometric correction, Bow-tie correction, cloud elimination and image cutting on a Yellow River remote sensing image, performing rough dividing on a river area, and integrally utilizing an NDSI detecting method and a clustering method, a divided area set m is obtained; then the area m is used as an SAR image detecting method input, a divided area set n is obtained through super-pixel dividing and calculating a salient map, and finally a solution for optimizing a Yellow River ice detecting model is searched through alternative iteration, thereby obtaining an optimal ice detecting area. Quick and effective testing for the ice of The Yellow River and high precision are realized.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Device and method for testing ice water erosion resistant performance of concrete
ActiveCN108956961AHigh precisionStrong controllability of parametersOptically investigating flaws/contaminationMaterial testing goodsWater bathsIce water
Owner:INNER MONGOLIA UNIV OF TECH
Optical ice thickness observation barrel
InactiveCN104713488AReal-time monitoring of production and consumption developmentSimple stepsTransmission systemsUsing optical meansObservational errorRemote control
The invention discloses an optical ice thickness observation barrel, and belongs to the technical field of automatic monitoring. The optical ice thickness observation barrel is used for automatically monitoring the ice layer thickness of river ice, lake ice and sea ice. The optical ice thickness observation barrel comprises an observation barrel body and balance float bowls connected with the observation barrel body. The observation barrel body is overall of a hollow cylindrical structure and is divided into an upper space and a lower space. A dividing ruler is arranged on the edge wall of one side of the upper space, a minitype remote control camera is arranged on the edge wall of the inner side, opposite to the dividing ruler, of the upper space, the remote control camera is used for shooting images, the images are transmitted in a wireless mode, the formation, disappearing and development of an ice layer can be automatically monitored in real time, convenience and rapidness are achieved, the labor intensity is lowered, and the monitoring efficiency is improved. According to the optical ice thickness observation barrel, the structure is simple, the steps of the measuring method are simple, the dividing ruler is used for reading directly, measuring errors are small, and measured data are reliable. The optical ice thickness observation barrel is not limited by a measured water area and cannot be influenced by the ambient environment temperature change, and thus good practicability and applicability are achieved.
Owner:TIANJIN UNIV
Method for calculating ice cover roughness of canal
ActiveCN110704793AAchieve correct calculationRealize evaluationComplex mathematical operationsHydrometryIce water
The invention relates to a method for calculating ice cover roughness of a canal. The method comprises the following steps: setting a measurement section; performing measurement; partitioning; calculating the comprehensive roughness of the riverway; and calculating the ice cover roughness of the riverway. The method comprises the following steps: firstly, accurately measuring each parameter of a frozen canal by adopting technologies such as river ice water mechanics and hydrological survey; the comprehensive roughness of the canal is calculated through the parameters, the ice cover roughness is deduced through the comprehensive roughness, correct calculation and evaluation of the ice cover roughness of the canal are achieved, and bases and references are provided for safe operation scheduling of the canal under the freezing condition in winter, correct evaluation of the water delivery flow, scientific response to accidents such as ice disasters and the like.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Yellow River ice run ice floating speed measuring method
InactiveCN104597286AStrong representativeHigh measurement accuracyFluid speed measurementAngular pointOptical flow
A Yellow River ice run ice floating speed measuring method includes the following steps: (1) segmenting and extracting an image of a river channel region to server as a target interest region; (2) calibrating an interest region in a field; (3) adopting an L-K optical flow method to serve as a basic algorithm for moving target detection and adding a pyramid model on the basis of the L-K optical flow method; (4) utilizing a strong angular point set as an ice tracking characteristic according to the Yellow River ice characteristic to conduct simultaneously tracking of multiple moving targets; (5) measuring the actual moving displacement of a plurality of ice targets in the field range and calculating the multi-target average speed; (6) building a software operation platform facing clients. The method has the advantages of being good in robustness, the accuracy of measurement results is greatly improved compared with the existing method, no special measuring device is required, the investment is less, the operation is simple, operators do not need to have special background, and the method can be widely applied to ice run daily hydrologic monitoring of a hydrologic station.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
Image detection system for analyzing river ice flower characteristics and ice cover thickness
ActiveCN109784224AAccurate thicknessCharacter and pattern recognitionClosed circuit television systemsWireless transmissionComputer module
The invention discloses an image detection system for analyzing river ice flower characteristics and ice cover thickness. The image detection system is suitable for analyzing the river ice flower characteristics and the ice cover thickness. The invention provides an image detection system which has a high-precision and real-time online function and can be used for continuously measuring the ice flower density, the particle size and the ice cover profile. According to the technical scheme, the system comprises a cylindrical container, an image acquisition module, a rotary moving module, a control module, a heating module and a wireless transmission module. The image acquisition module, the rotary moving module, the heating module and the wireless transmission module are both connected withthe control module. The cylindrical container is arranged in an ice hole in a detected place; wherein the heating module is adjacently arranged around the cylindrical container, the image acquisitionmodule ascends, descends and rotates in the cylindrical container along with the rotary moving module to acquire ice hole images around the cylindrical container, and the wireless transmission moduleis used for wirelessly transmitting the ice hole images to the monitoring center and receiving instructions from the monitoring center.
Owner:TAIYUAN UNIV OF TECH
Method for calculating scattering characteristic of river ice infrared waveband
ActiveCN107247038AReduce calculation errorsImprove accuracyScattering properties measurementsEarth observationKnowledge Field
The invention discloses a method for calculating scattering characteristic of a river ice infrared waveband, and belongs to the field of target and environmental infrared radiation scattering characteristic research. The problems that a scattering model has low calculation accuracy and low practicability in engineering because the fact that the river ice has the characteristics of strong directional scattering and strong scattering radiation brightness is not considered are solved. The method comprises the following steps: dividing BRDF on the surface of river ice into two parts, namely diffusion reflection BRDFdiff and specular reflection BRDFspec, and calculating the diffusion reflection BRDFdiff and the specular reflection BRDFspec separately to obtain the BRDF on the surface of the river ice; according to the BRDF on the surface of the river ice, the wavelength of incident solar radiation, the incident direction and the observation direction, calculating the radiation brightness after the river ice is scattered; and according to the radiation brightness, calculating the scattering radiation brightness after the scattering radiation brightness of the river ice is absorbed by atmosphere through the observation direction. The method is used for calculating the scattering radiation brightness of the river ice under solar radiation exposure during earth observation.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
River ice movement and beach erosion calculation method considering water, ice and sand coupling effect
ActiveCN111783346AVersatileImprove calculation accuracyDesign optimisation/simulationSpecial data processing applicationsRiver iceFluvial
The invention relates to a river ice movement and beach erosion calculation method considering a water, ice and sand coupling effect. The method comprises the steps that basic conditions are input, atwo-dimensional water and sediment numerical module is operated, and water and sediment elements and river ice elements are calculated; and the data is transmitted to a beach erosion module, the beachchange under the water-ice-sand coupling effect is calculated, the river ice element and the beach change are fed back to the two-dimensional water-sand numerical module, the water-sand element is updated, and the steps are repeated to sequentially calculate the water-sand elements, the river ice elements and the beach changes at different coupling time until the end time. The method can accurately simulate the non-constant water flow change, the river ice power process, the non-uniform sediment movement, the riverbed erosion and deposition change and the beach erosion process, and is suitable for beach erosion research under the influence of river ice of northern rivers in China; water, river ice, silt, beaches and other factors in natural rivers are considered, the method is closer to engineering practice problems, the calculation result is closer to the truth and reliable, the model functions are rich, and the calculation precision is high.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
High-precision format simulation method for one-dimensional ice-water coupling motion
ActiveCN110705188AImprove forecast accuracyTightly coupledClimate change adaptationDesign optimisation/simulationIce waterDiscretization
The invention relates to a high-precision format simulation method for one-dimensional ice-water coupling motion, and belongs to the field of river ice disaster forecasting. The method comprises the steps of boundary condition acquisition, equation control, ice-water coupling motion unified discretization, surface flux calculation, shallow water wave velocity calculation under the ice-water coupling condition and a high-precision format. According to the method, ice and hydrodynamic equations are uniformly dispersed into a high-precision Godunov format; an HLL approximate Rieman solution is adopted to calculate interface flux, equivalent water depth is adopted to replace section average water depth, piecewise linear reconstruction is carried out on basic variables of each unit in space, and a prediction-correction method is adopted in time, so that the precision of a numerical solution is integrally improved to a second order. The high-precision format simulation method for ice-water coupling movement has high prediction precision for the water level and ice thickness of the riverway in the flow ice period, particularly an equivalent water depth method is adopted to replace an average water depth method to calculate the wave velocity of shallow water waves, the water level prediction precision can be obviously improved, and research results are of great significance for prevention and control of ice disasters of the riverway.
Owner:CHINA WATER NORTHEASTERN INVESTIGATION DESIGN & RES
Three-dimensional ice-preventing and ice-blasting command platform
InactiveCN111047491ARealize real-time monitoringReduce lossesData processing applicationsClimate change adaptationEnvironmental resource managementRiver routing
The invention relates to a three-dimensional ice-preventing and ice-blasting command platform which is characterized by comprising a comprehensive monitoring system, an information service system, anice-preventing and flood-preventing system, an emergency management system, an ice-breaking and ice-blasting management system, a flood routing analysis system, a flood storage and detention area dispatching management system, a disaster evaluation system and a consultation system. The system is scientific and reasonable in design, can achieve the real-time monitoring of the riverway, provides support for the ice prevention and disaster reduction decision through the dynamic monitoring, analysis and query of the ice condition information, and reduces the loss caused by river ice flood disasters.
Owner:TIANJIN UNIV
Method for making experimental cylindrical ice sample
InactiveCN103954485AImprove integrityImprove accuracyPreparing sample for investigationSea iceEngineering
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
River ice numerical simulation method considering riverbed anchor ice
ActiveCN111881592AImprove calculation accuracyDesign optimisation/simulationSpecial data processing applicationsRiver routingAnchor ice
The invention relates to a river ice numerical simulation method considering riverbed ice anchoring. The method comprises the steps of collecting water ice data, calculating a one-dimensional shallowwater equation set, water body net heat absorption amount, water temperature, ice concentration in water, surface density of floating ice, ice flower layer thickness, ice cover thickness and ice anchoring thickness, updating a comprehensive roughness coefficient of a river channel, and simulating a river ice process and water level flow change. The method can accurately calculate the growth ablation process of the floating ice, the ice in the water, the ice cover and the anchor ice, can simulate the generation, development, propagation and dissipation process of the anchor ice flood wave, andis high in calculation precision; meanwhile, the method can evaluate the influence of the river ice process on the water level and flow change, the model application range is wide, and the method is suitable for large-range and long-duration ice flood simulation.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Method for enhancing safety of river ice surface temporary road by additionally mounting structure
InactiveCN109853321AHigh strengthImprove carrying capacityTemporary pavingsUltimate tensile strengthRoad traffic
The invention relates to a method for enhancing the safety of a river ice surface temporary road by additionally mounting a structure and belongs to the technical field of road traffic. In order to solve a problem that the river ice surface has a potential safety hazard as the temporary road, the invention provides the method for enhancing the safety of the river ice surface temporary road by additionally mounting the structure. Before icing, a net-shaped structure is pre-laid underwater, the net-shaped structure is fixed in a position, having 2 / 3 distance from the ice surface, in an ice layer, the two ends of the net-shaped structure are fixedly arranged on fixing piles on both shores, and the ice surface in the middle position above the net-shaped structure is the safe ice surface temporary road after the water surface is iced to form the ice surface. According to the method for enhancing the safety of the river ice surface temporary road by additionally mounting the structure, by additionally arranging the net-shaped structure in an ice body, the strength and bearing ability of the ice body are improved; the bearing ability of the ice body reaches 5KG / cm2 or above; the safety ofthe ice surface as the temporary road is enhanced; the safeties of passing vehicles and pedestrians are guaranteed; and a problem that traffic jams in cities are caused during using bridges in winters is effectively solved.
Owner:哈尔滨纽艾斯科技发展有限公司
Method for measuring yellow river ice uniaxial compression strength
PendingCN109459321AMaterial strength using tensile/compressive forcesUniaxial compressionTemperature control
The invention relates to a method for measuring yellow river ice uniaxial compression strength. The method comprises the following specific steps: 1) processing a uniaxial compression sample into a standard sample; 2) mounting a low-temperature constant-temperature test box, accessing a Pt type temperature sensor inside, and strictly controlling the temperature inside the test box through a temperature control meter; 3) starting a low-temperature constant-temperature circulating bath, and cooling the low-temperature constant-temperature test box to a set temperature; 4) placing the standard sample to perform constant-temperature process for 12 hours or above; 5) measuring the mass and the dimension of the standard sample; 6) placing the standard sample on the centre of a lower pressing head of the low-temperature constant-temperature test box; 7) starting an EDC digital controller, a computer and acquisition program; 8) setting test parameters, and loading and acquiring data; and 9) stopping loading once the sample is damaged. With the adoption of the technical scheme, ice body uniaxial compression strength feature at different temperatures under fine scale is researched, so that ascientific basis is provided for deeply analysis of cracking mechanism of a river ice cover body and ice prediction and forecast.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
Flow element measuring method for flow in river freezing period
ActiveCN111473823AReduce the number of drilled holesReduce the risk of personal accidentsVolume/mass flow measurementOpen water surveyStream flowEngineering
The invention relates to a flow element measuring method for flow in a river freezing period. The method comprises the steps: obtaining section water depth distribution; calculating the area of each strip-shaped unit; calculating an accumulated hydraulic radius; calculating a numerical difference value; calculating the value of the relative unit width flow at each measuring point; calculating theunit width flow of each measuring point; drilling and measuring; and calculating total flow. According to the calculation method, an under-ice drilling flow measurement method is greatly optimized, and the number of drilled holes in an ice cover is reduced. Compared with a traditional multi-hole multi-point flow velocity measurement method, only the flow velocities of two points need to be measured, the measurement workload is effectively reduced, the measurement cost in low-temperature severe weather is reduced, the flow measurement time is shortened, the risk of personal accidents of technicians is reduced, and the flow measurement efficiency under ice of northern rivers is greatly improved. Reduction of the number of the drilled holes in the ice cover is beneficial to maintaining flow velocity distribution and flow state under natural river ice, external interference introduced by measurement is reduced and then observation precision is improved.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Method for preventing and treating yellow river ice flood
InactiveCN101550685AAvoid hidden dangersReduce financial expenditureMarine site engineeringTerrainDry season
The invention discloses a method for preventing and treating yellow river ice flood, which is characterized in that: a artificial stream is channeled on upstream of the yellow river ice flood segment, wherein the artificial stream lies at downstream of JI-segment of yellow river, and communicates east and west of the yellow river; the selection of an initial point at west of the artificial stream and an end point at east is based on topography, and the topography that west and north are high and east and south is low is propitious to water flowing direction; the area that the artificial stream flows across has temperature differential to the ice flood segment, the temperature in area that the artificial stream flows across is higher than that at the ice flood segment, and mouth part of the artificial stream has a dam capable of controlling water level of the ice flood segment. The method of the invention radically resolves a hidden trouble of yellow river ice flood, saves national expenditure, avoids economic loss of the nation and people, the artificial stream has irrigation function in dry season and flood diversion function in flood season, is convenient to transport, and can protects original ecology of ice flood segment of the yellow river by adjusting water level of the ice flood segment by utilizing the water gate.
Owner:靳胜福
Method for measuring thicknesses of sea ice and river ice while drilling
InactiveCN103321567BImprove the efficiency of thickness measurementReduce labor intensitySurveyConstructionsMeasuring instrumentDisplay device
The invention discloses a drill tool and a method for measuring the thicknesses of sea ice and river ice while drilling. The drill tool comprises a display, a detection control unit, a direct-current motor, a screw drill pipe, a drill bit and a storage battery. A PLC (programmable logic control) module is integrated inside the detection control unit and can collect data measured by a torque sensor and a laser distance measuring instrument, and the drilling torque of the drill pipe and the thickness of an ice layer can be displayed via the display on the upper side of the detection control unit. The drill tool and the method have the advantages that drilling machines and tools can be effectively combined with measurement-while-drilling and automatic detection control measures, the data of the thickness of the sea ice can be acquired in a drilling procedure and can be displayed via the display, accordingly, the sea ice and river ice thickness measuring efficiency is greatly improved, and the labor intensity is reduced; the data are acquired and processed by the PLC module, and sudden change values can be adjusted according to different properties of ice of different regions, so that the detection method is excellent in practicality and applicability when applied to large regions.
Owner:JILIN UNIV
River ice coverage remote sensing monitoring method, electronic equipment and storage medium
ActiveCN111914733AAccurately obtainedImprove reliabilityForecastingScene recognitionSoil scienceMonitoring methods
The embodiment of the invention provides a river ice coverage remote sensing monitoring method, electronic equipment and a storage medium, and the method comprises the steps: carrying out the river water and river ice discrimination of a cloudless part of a river surface, and then carrying out the river water and river ice discrimination of a cloudy part of the river surface; obtaining a river water area of the river surface to be observed, a river ice area of the river surface to be observed and a cloud coverage area of the river surface to be observed in each river surface optical image; gridding the river water area of the river surface to be observed, the river ice area of the river surface to be observed and the cloud coverage area of the river surface to be observed in each river surface optical image to obtain a river ice coverage proportion time sequence of each river surface grid; determining river ice phenological information of each river surface grid according to the riverice coverage proportion time sequence of each river surface grid; introducing the river ice phenological information of each river surface grid into a preset fitting curve, and screening the river icephenological information in the preset fitting curve through a preset threshold to obtain final river ice phenological information of each river surface grid, thereby effectively improving detectionprecision.
Owner:AEROSPACE INFORMATION RES INST CAS
Suspended anti-icing ice breaker for the Yellow River
InactiveCN103774628BEasy to observeOptimize location relationshipWater cleaningIce breakersAgricultural engineeringScrew thread
Owner:李新军
A Method for Obtaining Scattering Characteristics of River Ice in Infrared Band
ActiveCN107247038BReduce calculation errorsImprove accuracyScattering properties measurementsEarth observationDiffuse reflection
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A flow element measurement method of river flow during ice-covered period
ActiveCN111473823BReduce the number of drilled holesReduce the risk of personal accidentsVolume/mass flow measurementOpen water surveyMeasurement costStream flow
The invention relates to a flow element measurement method for the flow of a river during the ice-covered period, comprising: obtaining the water depth distribution of the section; calculating the area of each strip unit; calculating the cumulative hydraulic radius; calculating the numerical difference value; calculating the relative single-width flow at each measuring point value; calculate the single-width flow of each measuring point; borehole measurement; calculate the total flow. The calculation method of the invention greatly optimizes the under-ice drilling method for flow measurement, and reduces the number of drilling holes on the ice sheet. Compared with the traditional porous multi-point flow velocity measurement method, the present invention only needs to measure the flow velocity at two points, which effectively reduces the workload of measurement, reduces the measurement cost under low temperature and bad weather, shortens the time of flow measurement, and reduces the The risk of personal accidents of skilled workers has greatly improved the efficiency of underglacial flow measurement of northern rivers. The reduction in the number of boreholes on the ice sheet is conducive to maintaining the flow velocity distribution and flow state of natural rivers under the ice, reducing the external interference introduced by the measurement, and improving the observation accuracy.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Yellow River ice dam image feature recognition method
ActiveCN111611910AGuaranteed robustnessGuaranteed stabilityCharacter and pattern recognitionSoil scienceIce dam
The invention discloses a Yellow River ice dam image feature recognition method, which comprises the steps of S1, acquiring a Yellow River ice dam sample image, and preprocessing the acquired Yellow River ice dam sample image; S2, creating a mode classifier based on the minimum distance of the decision theory and used for Yellow River ice dam image feature recognition, calculating a mode vector sample based on the preprocessed Yellow River ice dam sample image in the step S1, and training the constructed mode classifier through the mode vector sample; and S3, based on the trained mode classifier, carrying out mode initial identification on the to-be-detected Yellow River ice dam image, and carrying out false identification mode elimination on a mode initial identification result to obtaina feature identification result of the to-be-detected Yellow River ice dam image. Robustness, stability and real-time performance of Yellow River ice dam image mode recognition are effectively ensured, and the adaptability is high.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
A Calculation Method of Ice Cover Roughness of Canal
The invention relates to a method for calculating the roughness of the ice cover of a river channel, which comprises: setting a measuring section; measuring; partitioning; calculating the comprehensive roughness of the channel; The present invention adopts river ice hydraulics, hydrological measurement and other technologies to firstly accurately measure the various parameters of the frozen river channel, and calculate the comprehensive roughness of the river channel through these parameters, and then deduce the roughness under the ice cover from the comprehensive roughness rate, so as to realize the ice cover of the river channel The correct calculation and evaluation of the lower roughness ratio can provide the basis and reference for the safe operation and scheduling of river channels under freezing conditions in winter, the correct evaluation of water flow, and the scientific response to ice disasters and other accidents.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Representative characterization method for mechanical properties of river ice
PendingCN113569408ADesign optimisation/simulationComputational theoretical chemistrySoil scienceStatistical analysis
The invention relates to a representative characterization method for mechanical properties of river ice, and the method specifically comprises the steps: S1, determining a microstructure and a mesoscopic mechanism of a river ice representative body, obtaining the river ice representative body based on a mesoscopic calculation mechanical method, and constructing a river ice mesoscopic calculation model; S2, determining the strength performance of the river ice under different working conditions based on the river ice strength under the river ice mesoscopic calculation model, and analyzing the size of a river ice representative body to obtain a final result; and S3, carrying out statistical analysis on the strength change of the final result under different working conditions, and determining the minimum mesoscopic river ice body element capable of reflecting the overall sample strength. According to the method, a mesoscopic calculation mechanical method is adopted, the river ice strength is simulated on the basis of a constructed river ice mesoscopic calculation model, simulation calculation is conducted on the river ice strength under the uniaxial loading condition, and therefore the size of a river ice calculation strength representative body is determined.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
A coupled numerical simulation method for water ice and sand based on river ice dynamics
ActiveCN111783345BRealize Coupled Numerical SimulationCalculations are reliableDesign optimisation/simulationSpecial data processing applicationsWater iceFluvial
The invention relates to a numerical simulation method based on river ice dynamics coupled with water, ice and sand, including: input of basic conditions, operation of a non-constant water flow module based on finite elements, calculation of hydraulic elements, update of riverbed topographic information, and calculation to obtain The hydraulic elements and updated riverbed terrain information are transmitted to the glacier movement module, the calculation and update of each glacier element under water and sediment conditions, the calculated glacier elements and updated riverbed topographic information are fed back to the unsteady water flow module to update the hydraulic elements, and the calculations are performed sequentially. Coupling time hydraulic elements, ice elements and river bed topography information until the end time. The method of the invention can accurately simulate unsteady water flow changes, river ice dynamic process, non-uniform sediment movement and river bed scour-silting changes, and can be widely used in the research of river ice problems in high-latitude rivers. Compared with the traditional river dynamics model, the simulation method can be applied to the study of water ice and sand problems in different rivers and different seasons, and has a wider scope of application.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Device for detecting thickness of river ice layer
PendingCN109764837AMonitoring data is accurateHigh precisionUsing subsonic/sonic/ultrasonic vibration meansVisual inspectionEngineering
The invention discloses a device for detecting the thickness of a river ice layer. The device comprises a cuboid hollow container, a filter screen, a funnel, a shoreside fixing device, a multi-channelultrasonic apparatus and a monitoring center, wherein the cuboid hollow container is provided with the filter screen; the filter screen is provided with the funnel; the cuboid hollow container is connected with the shoreside fixing device; the shoreside fixing device is connected with the multi-channel ultrasonic apparatus; and the multi-channel ultrasonic apparatus is connected with the monitoring center. By use of the above technical scheme, the device for detecting the thickness of the river ice layer is manufactured. The device has the following advantages that: 1: the device can carry out real-time automatic monitoring and does not need manual field monitoring, so that work intensity is greatly lowered, and the device is safer and more reliable than visual inspection and apparatus inspection; 2: data can be stored in real time, and the thickness and the distribution situation of the ice layer can be dynamically displayed through calculation and image software; 3: ice layer monitoring data is accurate, accuracy is high, a monitoring range is wide, and the device can be suitable for various environments; and 4: repairing and maintenance cost is low, a probe is replaced in every3-5 years, a probe technology is mature, and cost is low.
Owner:曼图电子(上海)有限公司
Device for online measurement of river ice thickness
ActiveCN112284271BThere will be no change in the speed of propagationAccurate measurementUsing optical meansUsing wave/particle radiation meansAlcoholEngineering
The invention relates to a device for online measurement of the thickness of river channel ice, which includes a support column, a control box, a measuring part and a driving part. There are connecting rods between the supporting columns, and there are measuring parts between the connecting rods. The measuring part includes a slide bar, a buoy Plate, sliding block and measuring cylinder, the measuring cylinder is filled with alcohol, the alcohol contains upper suspension block, lower suspension block, displacement sensor and reflector, the upper suspension block is internally rotated with displacement sensor, and the upper end of the lower suspension block has reflective light plate, the present invention relies on the distance between the floating plate and the sliding block to determine the thickness of the ice layer, the lower end of the displacement sensor is flush with the surface of the ice surface, the upper surface of the reflector is flush with the lower surface of the ice layer, and the distance is measured with the displacement sensor, and The displacement sensor is placed in alcohol, the light or wave used for measurement propagates in the same medium, there will be no change in the speed of light or wave propagation, and the measurement result is accurate.
Owner:YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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