CN105761302A - Three-dimensional digital navigation channel system and application thereof - Google Patents
Three-dimensional digital navigation channel system and application thereof Download PDFInfo
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Abstract
The invention relates to a three-dimensional digital navigation channel system. The system is characterized by comprising a data input module used for inputting data into the system, a database module used for receiving, storing and managing all navigation channel data; a three-dimensional visual module used for establishing a three-dimensional navigation channel environment and integrating and displaying various navigation channel elements of a reach navigation channel; a water flow simulation module used for drafting a three-dimensional water flow model by use of actually measured water condition data and simulating real water flow conditions; and a data output module. A three-dimensional electronic navigation channel platform provided by the invention can express almost all content that can be expressed by a two-dimensional electronic navigation channel graph, can also vividly demonstrate such three-dimensional entities as landforms, geomorphy, ground objects and the like in the three-dimensional digital navigation channel system, realizes such three-dimensional interaction browsing functions as roaming, positioning, querying and the like, and provides more visual and more effective interaction experience.
Description
Technical field
The present invention relates to a kind of visual 3-dimensional digital navigation channel system, particularly, it is adaptable to the 3-dimensional digital navigation channel system of inland water transport.
Background technology
Fast development along with China's economy with science and technology, transportation obtains development at full speed as the highly important pillar industry of national economy, wherein inland water transport is as one of most basic transportation trade, there are the advantages such as freight volume is big, comprehensive benefit is high, energy consumption is low, environmental pollution is little, cost of transportation is low, are a means of transportation with the capability of sustainable development and are increasingly subject to pay close attention to widely.There is good inland water transport natural resources in China, have 6000 rivers nearly, overall length is more than 430,000 kilometers, wherein drainage area river more than 10,000 square kilometres just has 80 a plurality of, but, the Exploitation degree of China's inland water transport is not high, and one of the main reasons is that inland river management level fall behind, scientific information, modernization are out of step with the times the paces of development, and ship-handling is many is that main, navigation safety exists very big hidden danger by crewman's experience.It addition, along with the development of inland water transport cause, inland river navigable condition, means of transportation etc. all there occurs huge change, also bring a series of new problem simultaneously.Such as, in a large number new riverine, build so that cruiseway environment is day by day complicated across river building, increasing shipping safety problem brings unprecedented pressure also to existing sea-route management department.Currently, inland water transport cause develops towards specialized, standardization and scientific direction gradually, increasingly focusing on the standardized management to shipping industry and improve shipping safety and efficiency, scientific and reasonable shipping specification is significant to raising shipping safety and efficiency with the exploitation of new technique application.
Improve shipping safety and efficiency in science in, current main employing is aided with a series of decision analysis system based on two-dimensional vector electronic channel chart and inland river navigable condition is analyzed and management, how to utilize Spatial Information Technology and the navigation channel pattern of water flow of advanced person more efficient realize the information inquiry of boats and ships, location, monitoring, early warning and rescue in cruiseway, more efficient information system management means are provided for shipping safety management, by inland water transport cause to scientific, intelligent development, will be target and the direction of digitized navigation construction.
Two-dimensional vector electronic channel chart is the core of tradition numeral navigation channel, inland river application, science is provided basic reliably for navigation channel information data analysis, but two-dimensional vector electronic channel chart also has its limitation, its be all based on abstract symbol the same as common navigation channel chart is to the abstract of real world and summary, can not reduce intuitively display three-dimensional world real information, to user (especially layman) identification, analyze with reduce symbolic significance bring certain difficulty.
In navigational capacity, the waterlevel data of Current electronic navigation channel chart comes from the monitoring information of riverine water level website more, and in conjunction with navigation channel landform, the mode calculated by interpolation provides navigable depth contour.There is computational accuracy and ageing problem by the mode of monitoring station water level interpolation on the one hand, can cause that the time and space resolution of fairway depth is relatively low；On the other hand the depth of water is only one of factor of impact navigation, and safety and efficiency of opening the navigation or air flight is had very important impact by flow rate of water flow distribution characteristics characteristics of fluid states such as (flow velocity size) crossing current, eddy current equally.But in prior art, lack the display of velocity flow profile information, normally only represent the depth of water situation in navigation channel with the water level information of website, make the driver of boats and ships be difficult to recognize flow velocity size and the fluidised form of current.The simulation study of navigable flow is concentrated on waterway regulation works evaluation aspect, provides for navigation the research of real-time flow rate water depth distribution to have no report.
Summary of the invention
It is an object of the invention to provide a kind of 3-dimensional digital navigation channel system, it is characterised in that including:
For inputting the data input module of data to system；
For receiving, store, manage the DBM of all navigation channels data；
For setting up three-dimensional navigation channel environment, integrate, show the three-dimensional visualization module of all navigation channels key element in true navigation channel；
Adopt the hydrologic regime data drawing three-dimensional pattern of water flow of actual measurement, simulate the water flow simulation module of true flow condition；
Data outputting module.
The 3-dimensional digital navigation channel system of the present invention, described data input module includes static data and/or dynamic data.
The 3-dimensional digital navigation channel system of the present invention, described dynamic data includes ship's fix information and Hydrologic Information.
The 3-dimensional digital navigation channel system of the present invention, described Hydrologic Information includes the river course depth of water, flow velocity, fluidised form.
The 3-dimensional digital navigation channel system of the present invention, it is characterised in that described water flow simulation module, by dividing Unstructured grid, uses the difference method of finite volume method to solve the depth of water and the flow velocity of each mesh point, then is interpolated calculating, construct three-dimensional flow model.
The 3-dimensional digital navigation channel system of the present invention, it is characterised in that described three-dimensional visualization module shows the real-time depth of water and the velocity flow profile in navigation channel by isobath and flow-field visualized mode.
The 3-dimensional digital navigation channel system of the present invention, it is characterised in that described data outputting module includes display, handheld terminal, numeral curtain wall.
The present invention develops 3-dimensional digital navigation channel system, and the information that navigation is relevant is carried out three-dimensional comprehensive displaying, combines with water regime monitoring data and two dimension Hydrodynamic Model simultaneously, provides real-time flow velocity water depth distribution for ship navigation.Three-dimensional electronic navigation channel system can not only express all the elements that Two-dimensional electron navigation channel chart can be expressed, can also by 3D solid real embodiments such as such as landform, landforms, atural objects in 3-dimensional digital navigation channel system, realize such as three-dimension interaction functions of browse such as roaming, location, inquiries, it is provided that interactive experience more directly perceived, more effective.
Accompanying drawing explanation
Fig. 1 illustrates the 3-dimensional digital navigation channel system structure of the present invention.
Fig. 2 illustrates the digital navigation channel threedimensional model of the present invention.
Fig. 3 illustrates the threedimensional model organization chart of the present invention.
Fig. 4 illustrates the isobath scattergram of the present invention.
Fig. 5 illustrates the texture flow field dynamic analog schematic diagram of the present invention.
Fig. 6 illustrates the seaworthiness district display effect figure of the present invention.
Fig. 7 illustrates the particIe system dynamic analog schematic diagram of the present invention.
Fig. 8 illustrates zoning grid scattergram (30m) of the present invention.
Detailed description of the invention
Below, by conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is described in detail, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
It should be noted that, in this article, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.
In the present invention, Fig. 1 shows 3-dimensional digital navigation channel system structure.Fig. 2 display digit navigation channel threedimensional model.Fig. 3 shows threedimensional model organization chart.Fig. 4 shows isobath (vector) scattergram.Fig. 5 shows texture flow field dynamic analog schematic diagram.Fig. 6 shows seaworthiness district display effect figure.Fig. 7 shows particIe system dynamic analog schematic diagram.Fig. 8 shows zoning grid scattergram (30m).
In the present invention, data input module is for inputting data to system.The data of input can be divided into static data and dynamic data.Static data includes the navigation channel spatial informations such as bed configuration, bridge, harbour, water front construction, navigation mark, the boats and ships attribute such as ship identification number, length, width and height, drinking water, deadweight tonnage, maximum displacement and artificial divide prohibited area, seaworthiness district, Two-dimensional electron navigation channel chart (IENC) key element such as mooring area.Static data is mainly used in the modeling of three-dimension visible sysem, changes only small generally in time, it is not necessary to update frequently.Dynamic data includes the Hydrologic Informations such as the ship's fix information such as vessel position, the speed of a ship or plane, course, and the river course depth of water, flow velocity, fluidised form.Ship's fix information is positioned terminal by the GPS being arranged on boats and ships and obtains, and Hydrologic Information is then obtained by the monitoring terminal being arranged on hydrology website.
In the present invention, DBM is the data relay station of whole system, and all of navigation channel data are all received by DBM, store, manage.DBM can be divided into monitoring client data base and network data base.Wherein, static data is relatively big due to data volume, updates relatively slow, in order to ensure the display speed of three-dimensional navigation channel system, is normally stored in monitoring client data base.And dynamic data frequently changes in time, it is necessary to by communication network real-time Transmission to network data base, then by network data base, it is carried out storage and management.Once monitoring client sends request of data, network data base just can send rapidly data, updates the operational configuration of boats and ships and the input parameter of pattern of water flow.But in the present invention, however it is not limited to use GPRS communication network, it is also possible to use other communication networks, for instance, short wave communication etc..
In the present invention, visualization model is the nucleus module of 3-dimensional digital navigation channel system, is mainly used in setting up three-dimensional navigation channel environment, integrates, shows all kinds of navigation channels key element in true navigation channel, show the spatial information in navigation channel for boats and ships intuitively.User can in the environment of virtual navigation channel any changing position, the size of adjustable visual angle and focal length, to check the key element in each navigation channel.Meanwhile, system extracts Two-dimensional electron navigation channel chart key element, and in three-dimensional navigation channel, it is displayed by environment, it is achieved the combination of two dimension and three-dimensional electronic navigation channel chart.Additionally, the navigation of boats and ships is simulated by visualization model according to the ship's fix information of monitoring, the traffic of display boats and ships Its Adjacent Waters, provide navigation Service for boats and ships.
In the present invention, water flow simulation module is another nucleus module of 3-dimensional digital navigation channel system, is mainly used in the simulation of navigational capacity.Water flow simulation module sets up two dimension hydrodynamic force numerical model, the hydrologic regime data (mainly the Monitoring Data of upstream and downstream hydrology website) of actual measurement is inputted hydrodynamic model, water flow simulation module is by dividing Unstructured grid, the difference method using finite volume method solves the depth of water and the flow velocity of each mesh point, it is interpolated calculating again, drawing three-dimensional pattern of water flow, simulate true flow condition, show the real-time depth of water and the velocity flow profile situation in navigation channel finally by isobath and the mode such as flow-field visualized.Additionally, in order to ensure that simulated flow condition has good real-time, water flow simulation module employs the parallel computation technique based on OpenMP respectively and sets up water flow simulation scheme base method, and the calculating accelerating numerical model solves.
In the present invention, streamflow simulation is possible not only to provide water level Water Depth Information into boats and ships, but also provides another key factor affecting ship's navigation, i.e. flow-shape.Based on river two dimension hydrodynamics Numerical modelling, first need to use suitable discrete way that survey region is divided, resolve into polygonal mesh；Then, the river numerical model based on hydrodynamics carries out streamflow simulation, and analog result includes the flow rate of water flow field at each polygon node place, the depth of water in whole survey region；Finally, according to the flow rate of water flow of the polygonal mesh of simulating river employing and each node of calculating and Water Depth Information, carry out real-time by the mode in isobath, texture flow field and particIe system is drawn and represents, and particular content is as follows:
(1) isobath or etc. deep face: on the basis of available data, result is carried out all kinds of simulation science visualizations, isobath or etc. deep face be exactly a wherein representative class, it is possible not only to the height of display landform and rises and falls, and can also judge that the type of topography and geomorphology and gradient delay suddenly according to its density etc..Isobath or etc. the display in deep face go to cut existing grid landform mainly by the face of multiple fixing water depth values, generally quadrilateral mesh is divided into four triangular mesh, so that calculating, further according to different current computation schemes, it is carried out vector quantization to show, different water depth values can cut out different isobaths, and color gradient adopts the navigation channel isobath standard of standard to display.With traditional two-dimentional isobath the difference is that, this isobath is an isobath with 3-D effect, displays according to actual water level elevation, in anhydrous areas such as beaches by exposed for beach, the more true to nature 3-D effect illustrating isobath, as shown in Figure 4.
(2) flow-field visualized based on texture image: no matter be water surface High-precision image pinup picture or water depth distribution figure, all can only express the form in river, but the flow-shape in river is not but embodied, in the simulation of current flowing, seem stiff, therefore, the simulation of flow-shape becomes the primary study object improving current visualization aspect, dynamic current are simulated by the flow-field visualized mode based on texture image, from conventional with flow field grid discrete data point be object of study method for visualizing different, its using whole flow field as object of study the advection substituting particle with the Deformation Flow of image, the motion that core concept is based in flow field particle, substitute conventional particle movement with the motion deformation of background image and show flow field state, it it is a kind of method of macroscopic view graphical representation microcosmic particle motion.Plot step is as follows:
1) calculate the amount of movement of grid node according to current flow speed value, draw the flow field grid after deformation, mapped by texture and make background image deform with the deformation of grid；
2) adding Noise texture makes itself and background image blend to keep exquisiteness and the sustainability of flow field Dynamic Announce, the effect of shared flow field spike, forms new flow field state image；
3) image of new production image as a setting is carried out the circulation of a new round, and adopts different colors to show different flow velocity size distribution, it is achieved the Dynamic Announce effect in flow field.Effect is illustrated in fig. 5 shown below.
(3) flow-field visualized based on particIe system: particIe system is a kind of to apply the more method simulating irregular fuzzy objective, can simulate dynamic and randomness that object changes over time.Its basic thought is as basic element to represent irregularly shaped object using many simple fine particles.Therefore, fluid particle can be regarded as particle, the change procedure in so whole flow field just can regard the birth of particle, motion and the process withered away as, its characteristics of motion can be controlled by mathematical model result of calculation, and its birth and the rule withered away can be customized according to the demand of simulation effect, so the simulation of its stream field has good adaptability.
Additionally, when needing the flow behavior of performance particle, need to relate to locus, vector size, the parameters such as direction, and adopt list structure to carry out storing to reduce the judgement of circulation, the arrow of movement is generally adopted to represent, the length of arrow represents the size of flow velocity, wherein, red arrow represents that flow velocity is bigger, green arrow represents that flow velocity is less, and the sensing of arrow represents flow velocity direction, not only visually representability is unique, and can combine with physical mechanisms such as the movement under force of object, the true to nature kinestate simulating current, simulation effect is illustrated in fig. 6 shown below.
Output module is based on the hydrodynamic model result of calculation of ship's fix information Yu water flow simulation module, according to inland navigation standard, the seaworthiness district of boats and ships is drawn by visualization system, the contingent collision of boats and ships, stranded, various maritime accidents forecast such as hit a submerged reef are carried out risk analysis, provides in time for boats and ships, Warning Service accurately.Obtained information is added into marine navigation window, draws and recommends course line, and then improves the homing capability of 3-dimensional digital navigation channel system.
Water flow simulation module is mainly used in setting up hydrodynamic force numerical model, the Hydrologic Information according to hydrometric station monitoring, and streamflow campaign is simulated, and obtains the various flow conditions that navigation is required.Water flow simulation module adopts river course two dimensional model, sets up shallow water equation, solves navigation channel flow condition with finite volume method.Shallow water equation group conservation form is:
In formula (2): h is the depth of water；U, v are x, y direction flow velocity；The respectively base slope source item in x, y direction； The respectively frictional resistance gradient in x, y direction；ZbFor bed level of the river, n is Manning coefficient.Wherein, equation does not account for the impact of coriolis force and wind-force.
When hydrodynamic model numerical simulation, being generally adopted unhurried current boundary condition, give upstream flowrate border or discharge per unit width border, downstream gives water level border or stage-discharge border.
Owing to navigation channel has irregular complex appearance, select unstrctured grid to divide and navigation channel is carried out discretization, to solve shallow water equation group.The dividing mode of unstrctured grid can keep zoning consistent with actual flow area as much as possible, to ensure computational accuracy.Additionally, consider calculating speed and the computational accuracy of model, adopt the quadrilateral mesh of 30m and 100m precision that navigation channel is divided.As shown in Figure 8.Wherein, the number of grid of 30m precision grid is the number of grid of 131855,100m precision grids is 9700.The grid number of precision grid in the present invention, it is possible to selected from any range of 20m～200m, it is preferred to any range of 30m～100m, it is most preferred that for about 30m.
For 30m grid, adopt above-mentioned serial computing model, flow change after stability Calculation required time about 30 minutes, for real-time early warning system calculating overlong time.Therefore, the result of calculation in order to ensure pattern of water flow has better real-time, adopts the following two kinds method to accelerate the calculating speed of model:
(1) based on the mathematical model of shared drive, the mode implementation model adding OpenMP parallel instruction in the circulation and computing block of source program non-correlation parallel computation on polycaryon processor is adopted.On 16 core work stations, it is thus achieved that the speed-up ratio of 8.68 so that the calculating time shortens to 3 minutes.
(2) set up water flow simulation scheme base, prestore the upstream hydrology and stand in the flow condition analog result under different water level.3-dimensional digital navigation channel system has only to the current level at input hydrometric station, upstream, it is possible to directly invoke the result of calculation of similar water level from scheme base.Although the scheme base result called is accurate not as the result directly calculated, but spent time is very short, generally has only to the several seconds.
Outside navigation channel, system needs display road, place name, Administrative boundaries isovector key element.Therefore, load X-Y scheme layer as texture, set up level of detail model (LOD), according to viewpoint height show different accuracy two-dimensional map, it is ensured that two dimension key element be sized for screen.So, the display of two dimension and three-dimensional navigation channel information just can be realized by the switching of figure layer.Additionally, the visual angle of two-dimensional model has been limited by system, it is to avoid two dimension key element deforms, thus affecting user discrimination.
In navigation channel, system needs deep face, prohibited area, the seaworthiness district isovector key elements such as display current.These vector elements belong to dynamic key element, can change along with the change of flow condition.Static texture mapping cannot show key element process over time.Therefore, setting up three-dimensional flow model in navigation channel, represent different vector elements by different colors, these key elements are converted into three-dimensional from two dimension the most at last.For ordinary circumstance, system redness represents prohibited area, represents seaworthiness district by green, represents the deep faces such as current by blueness, and the depth of blueness then describes the size of the depth of water, and blueness more deep water is deep also more big.
Along with the complexity day by day of inland river navigation environment, the difficulty of shipping sector management increases gradually.Numeral navigation channel system is as a kind of instrument information-based, intelligentized, to improving Navigation in Navigable efficiency and safeguarding that navigation safety has important effect.The appearance of 3-dimensional digital navigation channel system further enhances the function of numeral navigation channel system, improves the efficiency of shipping management, has ensured the safety of ship's navigation.
In the present invention, based on being an embodiment with Jiangjin, the Changjiang river to Chongqing Section, key technology and function application are described in detail.In the present invention, Chongqing to leg, Jiangjin, it is under the jurisdiction of leg, Yangtze River shipping upstream, total length about 78 kilometers, bank includes Jiangjin District, Banan District, Dadukou District, Jiulongpo District, Nan'an District and Yu Zhong district, dry season, navigation channel minimum safeguarded that the depth of water reaches 2.7m, and flood period, the channel maintenance depth of water reached 3.0m, was III grade of navigation channel standard.This leg is the main thoroughfare of Yangtze River in China basin Material Transportation, maintains western part of China and middle part, and the development of China's west lags far is played indispensable effect.But meanwhile, this navigation channel, leg is narrower and bends changeable, and dangerous shoal is more, and crossing-fiver bridge is more, navigation environment is complicated.In order to ensure shipping safety further and improve shipping efficiency.
In the present embodiment, the implementation of 3-dimensional digital navigation channel system mainly includes following several step and completes, as follows:
(1) according to navigation channel image and navigation channel altitude data, three-dimensional navigation channel relief model is set up.
(2) it is loaded into navigation channel ground object model (including bridge, harbour, water front construction, navigation mark) in a model, builds virtual three-dimensional navigation channel environment, it is achieved the visualization of three-dimensional navigation channel.
(3) to two, three-dimensional electronic navigation channel chart carry out integrated, in the environment of three-dimensional navigation channel, show Two-dimensional electron navigation channel chart content.
(4) according to hydrologic regime data, set up hydrodynamic model, flow condition is calculated, simulation navigation channel current, it was predicted that the depth of water in navigation channel and velocity flow profile situation.
(5) utilize Flow Visualization, represent the depth of water and the velocity flow profile situation in navigation channel.
(6) according to inland navigation standard, the seaworthiness district of Ship ', analyzes Navigation in Navigable ability.
(7) in the environment of three-dimensional navigation channel, load boats and ships, according to ship's fix data, simulate the real operational configuration of boats and ships.
(8) integrate the sail information of all boats and ships in navigation channel, display navigation channel traffic, provide navigation Service for boats and ships.
(9) sail information of the seaworthiness district scope and boats and ships combining simulation is analyzed, it was predicted that boats and ships are likely encountered dangerous situation, issues navigation information to boats and ships, and draws recommendation course line.
By above method, the 3-dimensional digital navigation channel system of the present invention, mainly there is the advantage of following five aspects:
The first, applying three-dimensional visualization technique, set up three-dimensional navigation channel model, truly represent the environment of navigation channel and bank, show more rich navigation channel information, make user of service can be clearly understood that the navigation environment in navigation channel, strengthen the suitability of numeral navigation channel system, even the people not possessing specialty background and technological know-how also can be perfectly clear understands the navigation environment in navigation channel, strengthen the suitability of numeral navigation channel system, thus avoiding the generation of accident.
The second, simultaneously integrated two-dimensional and three-dimensional electronic navigation channel chart, set up virtual boats and ships, bridge and aid to navigation model on the one hand, reflect real navigation channel environment, being embedded in current isobath, seaworthiness district, prohibited area etc. in scene manually arranges the virtual navigation channel key element of division on the other hand, makes the advantage of two dimension and three-dimensional electronic navigation channel chart fully to combine.
3rd, ship navigation state is carried out monitor in real time by applying GPS location technology, sets up remote web server and boats and ships, regimen and riverbed data are carried out storage and management, provides an opening, data sharing platform that can be mutual for shipping monitoring.No matter it is marine navigator or Internal Shipping Management person, it is only necessary to a light-duty client just can inquire about, analyze shipping data, navigation channel water environment is simulated, it is achieved the safe early warning of boats and ships.
4th, adopt two dimension hydrodynamic model that navigation channel flow condition is carried out analogue simulation, flow field, waters environment is represented by flow field visualization method, dynamic navigational capacity information is provided in real time for boats and ships, such as the depth of water, flow velocity, boat width etc., meets the boats and ships demand to navigation safety.
5th, set up pre-alarming system, according to China's inland navigation standard, according to the navigation channel flow condition of simulation, mark off the seaworthiness district of boats and ships, it is achieved the safe early warning of ship's navigation.
The present invention provides a kind of novel 3-dimensional digital navigation channel system, Monitoring Data by hydrology website, set up two dimension hydrodynamic force numerical model, simulate true flow condition, according to inland navigation standard and ship information, determine prohibited area and the seaworthiness district of boats and ships, it is achieved boats and ships early warning, provide Warning Service timely, reliable for boats and ships and shipping management department.
Claims (7)
1. a 3-dimensional digital navigation channel system, it is characterised in that including:
For inputting the data input module of data to system；
For receiving, store, manage the DBM of all navigation channels data；
For setting up three-dimensional navigation channel environment, integrate, show the three-dimensional visualization module of all navigation channels key element in true navigation channel；
Adopt the hydrologic regime data drawing three-dimensional pattern of water flow of actual measurement, simulate the water flow simulation module of true flow condition；
Data outputting module.
2. 3-dimensional digital navigation channel system according to claim 1, it is characterised in that described data input module includes static data and/or dynamic data.
3. 3-dimensional digital navigation channel system according to claim 2, it is characterised in that described dynamic data includes ship's fix information and Hydrologic Information.
4. 3-dimensional digital navigation channel system according to claim 3, it is characterised in that described Hydrologic Information includes the river course depth of water, flow velocity, fluidised form.
5. 3-dimensional digital navigation channel system according to claim 1, it is characterized in that, described water flow simulation module, by dividing Unstructured grid, uses the difference method of finite volume method to solve the depth of water and the flow velocity of each mesh point, it is interpolated calculating again, constructs three-dimensional flow model.
6. 3-dimensional digital navigation channel system according to claim 1, it is characterised in that described three-dimensional visualization module shows the real-time depth of water and the velocity flow profile in navigation channel by isobath and flow-field visualized mode.
7. 3-dimensional digital navigation channel system according to claim 1, it is characterised in that described data outputting module includes display, handheld terminal, numeral curtain wall.
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| CN106840170A (en) * | 2017-03-26 | 2017-06-13 | 天津大学 | A kind of ship multidimensional navigation system based on Marine Numerical Prediction model |
| CN106840170B (en) * | 2017-03-26 | 2020-06-09 | 天津大学 | Ship multidimensional navigation system based on ocean numerical prediction model |
| CN107886462A (en) * | 2017-11-29 | 2018-04-06 | 湖北双可智能工程有限公司 | A kind of Digital Aerial trace integration management platform of two dimension three-dimensional integratedization |
| CN111354226A (en) * | 2020-03-06 | 2020-06-30 | 智慧航海（青岛）科技有限公司 | Autonomous driving ship navigation remote monitoring method and device based on three-dimensional image |
| CN111354226B (en) * | 2020-03-06 | 2022-05-06 | 智慧航海（青岛）科技有限公司 | Autonomous driving ship navigation remote monitoring method and device based on three-dimensional image |
| CN112487640A (en) * | 2020-11-27 | 2021-03-12 | 交通运输部天津水运工程科学研究所 | Simulation and prediction method for ecological influence of inland waterway improvement project |
| CN114005303A (en) * | 2021-09-29 | 2022-02-01 | 交通运输部天津水运工程科学研究所 | Intelligent forecasting method and system for navigation safety conditions of water area of bridge area |
| CN114820983A (en) * | 2022-04-27 | 2022-07-29 | 天津大学 | Dynamic irregular grid division method, equipment and medium for navigation safety evaluation |
| CN114820983B (en) * | 2022-04-27 | 2023-01-17 | 天津大学 | Dynamic irregular grid division method, equipment and medium for navigation safety evaluation |
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