CN104392387A - Unity3D-based circular coal yard three-dimensional (3D) intelligent visualization display platform - Google Patents
Unity3D-based circular coal yard three-dimensional (3D) intelligent visualization display platform Download PDFInfo
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Abstract
The invention relates to a Unity3D-based circular coal yard three-dimensional (3D) intelligent visualization display platform. Rapid and accurate checking of the inventory of a coal yard has great significance on cost accounting and scientific management of a power plant. The Unity3D-based circular coal yard 3D intelligent visualization display platform is characterized in that a 3D coal yard realization process involves generating 3D grid data according with coal yard reality through integrating point-cloud data scanned by a coal stocktaking instrument with daily coal sale data, generating a 3D stereogram by use of a Unity3D rendering technology, and then performing correction according real-time coal storage and consumption data according to a power plant DCS so as to improve the fitting precision of a drawn grid map and an actual coal yard shape. At the same time, a volume result of the coal yard inventory is given, the shape of the grid map is dynamically modified, and grid on-line 3D coal yard real-time updating is realized by use of a web technology. The Unity3D-based circular coal yard three-dimensional (3D) intelligent visualization display platform has the advantages of real-time performance, rapidness, low economic cost, high coal stocktaking precision and visual and clear interface.
Description
Technical field
The present invention relates to digital coal yard technical field, especially relate to a kind of circular coal yard 3 D intelligent visual presentation platform based on Unity3D.
Background technology
Coal consumption is an important production target of fuel-burning power plant, and fuel cost accounts for 70% ~ 80% of cost of electricity-generating.In order to accurately adjust cost of electricity-generating, generating plant one the moon foot couple coal yard tank farm stock make an inventory.Especially when coal in power plant anxiety, must according to the pot life of the existing coal yard coal load quantity of plan load Accurate Prediction of power plant.Therefore, coal yard tank farm stock is made an inventory quickly and accurately, and to carry out cost accounting, assessment of economic benefit and scientific management for power plant significant.
Current fuel-burning power plant generally uses laser coal inventory instrument to scan at the whole coal yard of moon foot couple, obtain three-dimensional coordinate information, but it is not vivid that the three-dimensional that matching generates deposits coal constitutional diagram, and to the inadequate science of the process of cloud data, cause the figure accuracy that obtains not high, have little significance in actual use.And because power plant is in the coal blending decision-making of every day, need the Coal Blending Schemes depositing the coal G-Design same day according to scene, so be necessary obtain every day deposit coal stereographic map.If use laser coal inventory instrument merely, can expensive time and material resources.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and a kind of design proposal in conjunction with three dimensional point cloud interpolation and computer vision modification method is provided, first this method carries out interpolation to three dimensional point cloud, the drawing of three dimensional network lattice point is carried out according to interpolation arithmetic result, revise according to the data of Power Plant DCS System again, to improve the fitting precision of grid chart and the actual coal yard shape of painting, it can provide the volume result of coal yard coal load quantity immediately simultaneously, on-the-fly modify the circular coal yard 3 D intelligent visual presentation platform based on Unity3D of grid chart shape.
The present invention's adopted technical scheme that solves the problem is: should be based on feature of the circular coal yard 3 D intelligent visual presentation platform of Unity3D: 3D coal yard realization flow is by the cloud data of combination order coal instrument scanning and enters pin coal data day, generate the three-dimensional mesh data meeting coal yard reality, Unity3D three-dimensional rendering technology is utilized to generate coal yard 3 dimensional drawing, revise according to Power Plant DCS System real time access coal data again, to improve the fitting precision of grid chart and the actual coal yard shape of painting, provide the volume result of coal yard coal load quantity simultaneously, on-the-fly modify grid chart shape, and utilize web technology to realize network online 3D coal yard real-time update.
As preferably, the present invention, for the existing laser coal checking instrument system of power plant, must analyze its principle of work, dish coal instrument the data obtained is converted to conventional three-dimensional coordinate system; This is because dump surface imperfection, even if Scanning step is certain, the three-dimensional Scattered data points being still random stochastic distribution finally obtained.
As preferably, 3D coal yard of the present invention is visual carries out radial basis functions interpolation arithmetic to the cloud data of random stochastic distribution, forming curves or curved surface exactly, and graphically out.
As preferably, the present invention adopts Delaunay triangulation to carry out gridding process to sampled data, sampled data can be carried out reasonably subdivision by Delaunay algorithm, and connect into triangular mesh, the all leg-of-mutton Minimum Internal Angle sum that this algorithm can make subdivision obtain is maximum, and make all not comprise in arbitrary triangle circumscribed circle other points a little concentrated, each triangle is as far as possible close to equilateral triangle, avoid the existence of long-narrow triangular mesh, thus obtain 3D grid; Gridding is that the 3 d space coordinate point set of a cloud is fitted to non-cross network of triangle according to corresponding algorithm; After sampled data gridding, the 3 dimensional drawing of generating mesh, prepares for next step generates dump 3 dimensional drawing.
As preferably, coal yard three-dimensional tridimensional virtual display platform of the present invention have employed the complex art of Flash and Unity 3D based on the design of B/S framework spanning operation system platform, and display platform system is divided into metadata schema, database, Unity3D service, application layer and presentation layer 5 Rotating fields; Database stores system-critical data by file set is incompatible, is divided into scene database and Service Database in platform; The metadata of scene database comprises modeling, material and action, and the metadata of Service Database comprises coordinate and coal yard parameter information; Unity 3D serves the operation logic of main finger system, comprises the Scalable of model, rotates translation, visual angle effect and action triggers; Application layer mainly refers to the service logic of system, on the basis of Unity3D provisioning interface, carry out the service data manipulatings such as scene display, for presentation layer provides real-time exhibition information, in application layer by the subdivision of three-dimensional picture and matching, thus obtain two dimension after circular coal yard launches and deposit coal profile diagram; Presentation layer comprises user interface and special effect processing, and special effect processing comprises animation effect and model special efficacy.
As preferably, B/S structure of the present invention mainly make use of ripe browser technology, in conjunction with multiple Script language and the ActiveX technology of browser, achieve the power originally needing complex proprietary software to realize with general browser, saved cost of development; Visual the making of Web realizes online real time inspection coal yard 3 dimensional drawing in a browser, and providing friendly Visual Intelligent Interface Model, auxiliary coal planned production, the technology of design mainly comprises network implementation framework, server back end data processing technique, and client interaction technique.
As preferably, the present invention improves circular coal yard three-dimensional visualization precision as far as possible, need to make full use of the current coal yard access coal data that can gather of power plant, coal yard access coal data comprise dish coal instrument data, day access coal amount data, manually measure data, belt conveyer scale data and video data.
As preferably, cloud data of the present invention refers on two dimensional surface or in three dimensions, the data of random stochastic distribution, and it is visual carries out interpolation or matching to cloud data, forming curves or curved surface exactly, and by the technology that figure and image show; What got by laser range finder and map star is obviously cloud data, and these data can not be used for image reproduction and pattern fits, so will carry out interpolation arithmetic; Main interpolation algorithm comprises the weighting algorithm, Interpolation Property of Radial Basis Function method and the finite element method that are inversely proportional to distance, and concerning the interpolation of data, radial basis functions interpolation is best, and the specific algorithm of radial basis functions interpolation arithmetic is as follows:
Be located on two dimensional surface and have n point (x
i, y
i), i=1,2 ... and have Z n),
i=f (x
i, y
i); Interpolation problem will construct a continuous print function F (x, y) exactly, makes it at (x
k, y
k), (k=1,2 ... n) functional value put is Z
ki.e. Z
k=F (x
k, y
k) (k=1,2 ... n);
Radial basis function is made up of the function of single variable, this basis function form h often of a point (x, y)
k(x, y)=h (d
k), d here
krepresent by point (x, y) to the distance of a kth data point;
In formula, q
k(x, y) is a polynomial basis, and its order is less than m, coefficient a
k, b
ksimultaneous Equations below should be met:
Before in above formula, n equation meets interpolation requirement, and m equation then ensure that polynomial expression precision below, and total m+n equation in two formulas, simultaneous solution, can draw undetermined coefficient.
As preferably, the concrete steps of three-dimensional rendering of the present invention are as follows:
Input: the coordinate (x of n point in plane
i, y
i), (i=1,2 ... n), this point set is designated as S;
Export: the triangulation chained list T=(P of n point
1, P
2, P
i) → (P
2, P
i, P
j→... (P
n-2, P
n-1, P
n);
Side enlarger arithmetic is the core of whole algorithm, is designed to an independently subroutine, parameter P
1, P
2, P
3for three summits of band extended triangular shape,
for band expansion limit;
Step 1: check P
1the limit table of point
if it has
and access times ncount is more than or equal to 2, then return;
Step 2: circulation point chained list PointList, looks for the some P satisfied condition
4, from PointList, get node P successively:
1) judge whether P point is limit
end points, if so, then go to step 2, otherwise continue;
2) P point and P is judged
3whether point lays respectively at limit
both sides, if not, then go to step 2, otherwise continue;
3) the limit table E of P point is checked
p, see in the table of limit whether have P
1, P
2whether point, namely have P
1∈ L
por P
2∈ L
pif have, and the limit access times ncount of one of them is 2, then go to step 2, otherwise continues;
4) calculation level P and some P
1, P
2angulation value ∠ P
1pP
2if there is cos (∠ P
1pP
2) < cos (∠ P
1p ' P
2), wherein P ' is the last point found, then upgrade this value, and the call number of record P point;
5) step 2 is forwarded to.
Step 3: if be recorded to the call number of a P, then continue, otherwise return;
The point P of step 4:P point for finding
4, will with P
1, P
2, P
4for the triangle Δ on summit
ijoin in triangle chained list T, triangle count TriCount cumulative 1;
Step 5: upgrade P respectively
1, P
2, P
4limit table
with P
1the limit table of point
be updated to example:
1) P is traveled through
1the limit table of point
if have
or
then its corresponding limit access times ncount is added 1, otherwise by P
2point or P
4point joins P
1limit table
in, and limit access times ncount is initialized as 1;
2) P is traveled through
1the limit table of point
if the limit access times ncount of all nodes is 2, then by P
1point is rejected from a chain PointList;
3) use the same method renewal P
2point and P
4point;
In coal yard coal stocktaking system, require a few features point only measuring dump surface profile, then the three-dimensional data points applying these clouds simulates the surface profile of dump, and show on computers, the spatial topotaxy of these these points of will seeking knowledge, characterize actual curved surface with the triangle surface of Spatial continual splicing, then interpolation on each triangle surface, to obtain accurate description; So adopting said method can simulate the shape on coal yard surface well, and obtains the coal load quantity of whole coal yard.
As preferably, user of the present invention and browser mutual time, the basic operation of user mainly contains:
1. amplify: the local of amplifying figure, be beneficial to the details of observing dump;
2. reduce: reduce figure, be beneficial to hold dump overall;
3. rotate: with coal yard center for initial point, rotate around Y-axis and Z axis, be beneficial to observe coal yard from all directions, all angles;
4. translation: move in parallel image along screen X-direction or Y-direction, is beneficial to choose object observing;
5., in returning: image is returned in initial position, be namely positioned at the central authorities of screen, be user-friendly to;
6. blanking: provide two kinds of grids, the grid after stereoscopic grid and blanking, the grid after blanking more has stereoscopic sensation, is beneficial to observation;
7. the whole audience is drawn: after reading in intermediate input file, after selecting this function from menu or toolbar, starts dynamically to draw dump figure;
8. volume computing: after drafting, provides the coal load quantity of coal yard in the below in screen client district with the form of dialog box;
9. partial points amendment: in order to reflect the details of coal yard image better, provides the function of partial points amendment, makes user according to the actual conditions at scene, can revise figure neatly.
The present invention compared with prior art, have the following advantages and effect: in large-scale outdoor coal yard coal stocktaking, the display packing of the three-dimensional irregular data that laser scanning collects is studied, propose a kind of design proposal in conjunction with three dimensional point cloud interpolation and computer vision modification method, first this method carries out interpolation to three dimensional point cloud, the drawing of three dimensional network lattice point is carried out according to interpolation arithmetic result, revise according to the data of Power Plant DCS System again, to improve the fitting precision of grid chart and the actual coal yard shape of painting, it can provide the volume result of coal yard coal load quantity immediately simultaneously, on-the-fly modify grid chart shape.Visualization in scientific computing refers to and uses computer graphics and image processing technique that the data of the data in scientific computing process and result of calculation are converted to image, screen shows and carries out interaction process theory, Method and Technology, it relates to the visual of 3 d data field, the interactive controlling of computation process and guiding, the parallel algorithm of graphic hotsopt and image processing, the programming environment of Graphics-oriented, and virtual reality technology etc.
Content of the present invention mainly comprises: (1), for power plant's existing dish coal instrument system, must be analyzed its principle of work, dish coal instrument the data obtained is converted to conventional three-dimensional coordinate system.(2) have studied the main method of traditional curved surface figure display, the curved-surface display for scattered data being proposes solution, gives the interpolation method of scattered data being.(3) by Delaunay triangulation, the 3 dimensional drawing of generating mesh, for the map generalization of dump 3 D stereo lays the foundation.(4) application is above theoretical, proposes the practical plan of coal yard dish coal, upgrades simultaneously, finally worked out coal yard three dimensional graph display software based on Unity 3D according to the data of Power Plant DCS System.The present invention is on the basis of laser coal inventory instrument data, the whole coal yard of laser scanning is utilized to obtain cloud data, by coal yard is divided into uniform grid, the interpolation algorithm of cloud data is utilized to obtain interpolation, again by image fitting technique correction interpolation, reappear the 3 dimensional drawing of whole coal yard by Unity3D technology, according to the real time access coal data of Power Plant DCS System, carry out real-time update to depositing coal figure, financial cost and accuracy requirement can be ensured accordingly.
Accompanying drawing explanation
Fig. 1 is circular coal yard 3 D intelligent visual presentation platform technology scheme schematic diagram, wherein, (a) represents data processing schematic diagram, and (b) represents interpolation arithmetic schematic diagram, c () represents that 3D plays up schematic diagram, (d) represents the visual schematic diagram of Web.
Fig. 2 is the 3-D display platform schematic diagram based on Unity3D.
Embodiment
Below in conjunction with accompanying drawing, also by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment.
For current power plant technical background and demand, the main task of 3D coal yard power plant is deposited the visual display of coal situation, 3D coal yard realization flow be by combination order coal instrument scanning cloud data and enter the data such as pin coal day, generate the three-dimensional mesh data meeting coal yard reality, the three-dimensional rendering technology such as Unity3D are utilized to generate coal yard 3 dimensional drawing, and utilize web technology to realize the online 3D coal yard of network, realize decision support for power plant provides.
For improving the visual precision of 3D coal yard as far as possible, needing to make full use of the current coal yard that can gather and depositing coal data, mainly comprise dish coal instrument data, day access coal amount data, manually measure data, belt conveyer scale data and video data.From prior art, in above-mentioned several data source, the data of dish coal instrument are the most accurate, but make an inventory consuming time longer owing to coiling coal instrument at every turn, should not frequently use; Day access coal total amount is then directly corresponding with turnout, and precision is higher, but gets coal positional information owing to lacking coal yard, is difficult to directly generate coal yard stereographic map; The data of belt conveyer scale are then comparatively large due to measuring error, for reference only with auxiliary; Then, coal yard carries out direct sample to video data, needs Complex Modeling, can extract useful data; Manually measuring is current conventional method, but due to human factor, chaining error is comparatively large, can be used as auxiliary data.
As shown in Figure 1, Fig. 1 is circular coal yard 3 D intelligent visual presentation platform technology scheme schematic diagram, and specific embodiments is as follows.
(1) laser coal inventory instrument data prediction.
No matter owing to being tower or the dish coal instrument of hand-held has multiple measurement basic point, and each data point set measuring that basic point obtains is in the coordinate system being true origin with this measurement basic point, so first must there be the process of a coordinate transform.Laser coal inventory instrument utilizes two-dimentional high-frequency laser scanner to carry out high-frequency profile scanning to the surface in stock ground to obtain highdensity profile data, the scanner deflection angle data that the stock ground length obtained in conjunction with stroke measuring device and backhaul measuring appliance obtain, realize the display of the calculating of stock ground volume, stock ground three-dimensional model.Controlling turntable by computing machine drives laser distance measuring system in sequence to coal yard surface scan, calculates the three-dimensional coordinate of each measuring point in coal yard simultaneously.Because coal yard surface is irregular, even if Scanning step is certain, what finally obtain is still three-dimensional Scattered data points.Figure display and the key of volume computing part are surface fitting, and the basis of curve is data interpolating accurately.
(2) interpolation arithmetic of cloud data.
Cloud data refers on two dimensional surface or in three dimensions, the data of random stochastic distribution.It is visual carries out interpolation or matching to cloud data exactly, forming curves or curved surface the technology showed with figure and image.What got by laser range finder and map star is obviously cloud data, and these data can not be used for image reproduction and pattern fits, so will carry out interpolation arithmetic.Main interpolation algorithm has: the weighting algorithm be inversely proportional to distance, Interpolation Property of Radial Basis Function method, finite element method etc.Concerning the interpolation of data, radial basis functions interpolation is best, and Fig. 1 (b) is the stereographic map obtained after interpolation.Specific algorithm is as follows:
Be located on two dimensional surface and have n point (x
i, y
i), (i=1,2 ... and have Z n),
i=f (x
i, y
i).Interpolation problem will construct a continuous print function F (x, y) exactly, makes it at (x
k, y
k), (k=1,2 ... n) functional value put is Z
ki.e. Z
k=F (x
k, y
k) (k=1,2 ... n).
Radial basis function is made up of the function of single variable.This basis function form h often of a point (x, y)
k(x, y)=h (d
k), d here
krepresent by point (x, y) to the distance of a kth data point.
In formula, q
k(x, y) is a polynomial basis, and its order is less than m.Coefficient a
k, b
ksimultaneous Equations below should be met:
Before in above formula, n equation meets interpolation requirement, and m equation then ensure that polynomial expression precision below.Total m+n equation in two formulas, simultaneous solution, can draw undetermined coefficient.
(3) three-dimensional rendering.
Tetrahedral grid model is a kind of true three-dimensional data model, simulates dump with it, and not only convenient process calculates, and is also convenient to dump stereo display.Gridding is that the 3 d space coordinate point set of a cloud is fitted to non-cross network of triangle according to corresponding algorithm.Sampling after the gridding of mutual office can the 3 dimensional drawing of generating mesh, prepares for lower step generates dump 3 dimensional drawing.The present embodiment adopts Delaunay triangulation to carry out gridding process to sampled data, sampled data can be carried out reasonably subdivision by Delaunay algorithm, and connect into triangular mesh, the all leg-of-mutton Minimum Internal Angle sum that this algorithm can make subdivision obtain is maximum, in arbitrary triangle circumscribed circle, all do not comprise other points a little concentrated, each triangle, as far as possible close to equilateral triangle, avoids the existence of long-narrow triangular mesh, and the 3D grid therefore generated is also more excellent.Concrete implementation step is as follows:
Input: the coordinate (x of n point in plane
i, y
i), (i=1,2 ... n), this point set is designated as S.
Export: the triangulation chained list T=(P of n point
1, P
2, P
i) → (P
2, P
i, P
j) →... (P
n-2, P
n-1, P
n)
Side enlarger arithmetic is the core of whole algorithm, is designed to an independently subroutine, parameter P
1, P
2, P
3for three summits of band extended triangular shape,
for band expansion limit.
Step 1: check P
1the limit table of point
if it has
and access times ncount is more than or equal to 2, then return.
Step 2: circulation point chained list PointList, looks for the some P satisfied condition
4.Node P is got successively from PointList:
1) judge whether P point is limit
end points, if go to step 2, otherwise continue.
2) P point and P is judged
3whether point lays respectively at limit
both sides, if not go to step 2, otherwise continue.
3) the limit table E of P point is checked
p, see in the table of limit whether have P
1, P
2whether point, namely have P
1∈ L
por P
2∈ L
p.If have, and the limit access times ncount of one of them is 2, namely goes to step 2, otherwise continues.
4) calculation level P and some P
1, P
2angulation value ∠ P
1pP
2if there is cos (∠ P
1pP
2) < cos (∠ P
1p ' P
2), wherein P ' is the last point found, then upgrade this value and the call number of record P point.
5) step 2 is forwarded to.
Step 3: if be recorded to the call number of a P, then continue, otherwise return.
The point P of step 4:P point for finding
4, will with P
1, P
2, P
4for the triangle Δ on summit
ijoin in triangle chained list T, triangle count TriCount cumulative 1.
Step 5: upgrade P respectively
1, P
2, P
4limit table
with P
1the limit table of point
be updated to example:
1) P is traveled through
1the limit table of point
if have
or
then its corresponding limit access times ncount is added 1, otherwise by P
2point or P
4point joins P
1limit table
in, and limit access times ncount is initialized as 1.
2) P is traveled through
1the limit table of point
if the limit access times ncount of all nodes is 2, then by P
1point is rejected from a chain PointList.
3) use the same method renewal P
2point and P
4point.
In coal yard coal stocktaking system, require a few features point only measuring dump surface profile, the three-dimensional data points then applying these clouds simulates the surface profile of dump, and shows on computers.The spatial topotaxy of these these points of will seeking knowledge, characterize actual curved surface with the triangle surface of Spatial continual splicing, then interpolation on each triangle surface, to obtain accurate description.So adopting said method can simulate the shape on coal yard surface well, and obtains the coal load quantity of whole coal yard.
(4) Unity 3D virtual display.
Unity 3D is as a kind of three-dimension virtual reality gaming platform, the three-dimensional model that process that can be abundant, real-time is a large amount of, wherein Unity 3D engine is that it creates the core technology of high-quality 3D analogue system and actual visual effect, DirectX and OpenGL is had to the graph rendering pipeline of height optimization.The complex art that coal yard tridimensional virtual display platform have employed Flash+Unity 3D designs based on B/S framework spanning operation system platform.As shown in Figure 2, display platform system is divided into metadata schema, database, Unity3D service, application layer and presentation layer 5 Rotating fields.Embodiment is as follows:
1) Web is visual: mainly solve and realize in a browser checking coal yard 3 dimensional drawing in real time online, and provide friendly Visual Intelligent Interface Model, auxiliary coal planned production.The technology of design mainly comprises network implementation framework, server back end data processing technique, and client interaction technique.
2) B/S framework: Browser/Server Mode is a kind of network structure pattern after WEB rises.The core that systemic-function realizes focuses on server by this pattern, simplifies the exploitation of system, maintenance and use.Browser carries out data interaction by WebServer with database.Based on above-mentioned advantage and current coal yard technology, 3D coal yard adopts B/S framework, and server end generates correct grid data, and browser end is played up and visual coal yard stereographic map, as shown in Fig. 1 (d).
3) server background correlation technique.
4) browser interface interaction technique: mainly set up a friendly visualization interface, be convenient to check that coal information deposited by current coal yard.Deposit coal information inspection mainly by the mutual realization of user and browser.The interactive information of browser be then comprise three kinds mutual: html and server interaction, html and unity3D are alternately and html and user interactions.
5) user and browser mutual: the basic operation of user mainly contains: 1. amplify: the local of amplifying figure, is beneficial to observe the details of dump.2. reduce: reduce figure, be beneficial to hold dump overall.3. rotate: with coal yard center for initial point, rotate around Y-axis and Z axis, be beneficial to observe coal yard from all directions, all angles.4. translation: along screen X-direction or Y-direction, move in parallel image, is beneficial to choose object observing.5., in returning: image is returned in initial position, be namely positioned at the central authorities of screen, be user-friendly to.6. blanking: this patent provides two kinds of grids, the grid after stereoscopic grid and blanking, the grid after blanking more has stereoscopic sensation, is beneficial to observation.7. the whole audience is drawn: after reading in intermediate input file, after selecting this function from menu or toolbar, starts dynamically to draw dump figure.8. volume computing: after drafting, provides the coal load quantity of coal yard in the below in screen client district with the form of dialog box.9. partial points amendment: in order to reflect the details of coal yard image better, this software provides the function of partial points amendment, makes user according to the actual conditions at scene, can revise figure neatly.
The circular coal yard 3 D intelligent visual presentation platform based on Unity3D in the present invention is in large-scale outdoor coal yard coal stocktaking, utilize Unity3D platform to realize visual display that fuel-burning power plant circular coal yard deposits coal situation, for the daily production of power plant provides friendly decision support.The display packing of the three-dimensional irregular data that laser scanning collects is studied, proposes a kind of design proposal in conjunction with three dimensional point cloud interpolation and computer vision modification method.First interpolation is carried out to the three dimensional point cloud of laser coal inventory instrument scanning, generate the three-dimensional mesh data meeting coal yard reality, the three-dimensional rendering technology such as Unity3D are utilized to generate coal yard 3 dimensional drawing, revise according to Power Plant DCS System real time access coal data again, to improve the fitting precision of painted grid chart and actual coal yard shape.It can provide the volume result of coal yard coal load quantity immediately simultaneously, on-the-fly modifies grid chart shape, utilizes web technology to realize network online 3D coal yard real-time update.Compared with traditional dish coal method, technical advantages such as having real-time, financial cost is low, dish jet degree is high, objective interface understands.
In addition, it should be noted that, the specific embodiment described in this instructions, the shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this instructions is only to structure example of the present invention explanation.The equivalence change that structure, feature and the principle of all foundations described in inventional idea of the present invention are done or simple change, be included in the protection domain of patent of the present invention.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (10)
1. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D, it is characterized in that: 3D coal yard realization flow be by combination order coal instrument scanning cloud data and enter pin coal data day, generate the three-dimensional mesh data meeting coal yard reality, Unity3D three-dimensional rendering technology is utilized to generate coal yard 3 dimensional drawing, revise according to Power Plant DCS System real time access coal data again, to improve the fitting precision of grid chart and the actual coal yard shape of painting, provide the volume result of coal yard coal load quantity simultaneously, on-the-fly modify grid chart shape, and utilize web technology to realize network online 3D coal yard real-time update.
2. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 1, it is characterized in that: for the existing laser coal checking instrument system of power plant, must its principle of work be analyzed, dish coal instrument the data obtained is converted to conventional three-dimensional coordinate system; This is because dump surface imperfection, even if Scanning step is certain, the three-dimensional Scattered data points being still random stochastic distribution finally obtained.
3. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 2, it is characterized in that: 3D coal yard is visual carries out radial basis functions interpolation arithmetic to the cloud data of random stochastic distribution exactly, forming curves or curved surface, and graphically out.
4. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 1 or 2 or 3, it is characterized in that: adopt Delaunay triangulation to carry out gridding process to sampled data, sampled data can be carried out reasonably subdivision by Delaunay algorithm, and connect into triangular mesh, the all leg-of-mutton Minimum Internal Angle sum that this algorithm can make subdivision obtain is maximum, make all not comprise in arbitrary triangle circumscribed circle other points a little concentrated, each triangle is as far as possible close to equilateral triangle, avoid the existence of long-narrow triangular mesh, thus obtain 3D grid, gridding is that the 3 d space coordinate point set of a cloud is fitted to non-cross network of triangle according to corresponding algorithm, after sampled data gridding, the 3 dimensional drawing of generating mesh, prepares for next step generates dump 3 dimensional drawing.
5. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 1 or 2 or 3, it is characterized in that: coal yard three-dimensional tridimensional virtual display platform have employed the complex art of Flash and Unity 3D based on the design of B/S framework spanning operation system platform, and display platform system is divided into metadata schema, database, Unity3D service, application layer and presentation layer 5 Rotating fields; Database stores system-critical data by file set is incompatible, is divided into scene database and Service Database in platform; The metadata of scene database comprises modeling, material and action, and the metadata of Service Database comprises coordinate and coal yard parameter information; Unity 3D serves the operation logic of main finger system, comprises the Scalable of model, rotates translation, visual angle effect and action triggers; Application layer mainly refers to the service logic of system, on the basis of Unity3D provisioning interface, carry out the service data manipulatings such as scene display, for presentation layer provides real-time exhibition information, in application layer by the subdivision of three-dimensional picture and matching, thus obtain two dimension after circular coal yard launches and deposit coal profile diagram; Presentation layer comprises user interface and special effect processing, and special effect processing comprises animation effect and model special efficacy.
6. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 5, it is characterized in that: B/S structure mainly make use of ripe browser technology, in conjunction with multiple Script language and the ActiveX technology of browser, achieve the power originally needing complex proprietary software to realize with general browser, save cost of development; Visual the making of Web realizes online real time inspection coal yard 3 dimensional drawing in a browser, and providing friendly Visual Intelligent Interface Model, auxiliary coal planned production, the technology of design mainly comprises network implementation framework, server back end data processing technique, and client interaction technique.
7. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 1 or 2 or 3, it is characterized in that: for improving circular coal yard three-dimensional visualization precision as far as possible, need to make full use of the current coal yard access coal data that can gather of power plant, coal yard access coal data comprise dish coal instrument data, day access coal amount data, manually measure data, belt conveyer scale data and video data.
8. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 3, it is characterized in that: cloud data refers on two dimensional surface or in three dimensions, the data of random stochastic distribution, it is visual carries out interpolation or matching to cloud data exactly, forming curves or curved surface, and by the technology that figure and image show; What got by laser range finder and map star is obviously cloud data, and these data can not be used for image reproduction and pattern fits, so will carry out interpolation arithmetic; The specific algorithm of radial basis functions interpolation arithmetic is as follows:
Be located on two dimensional surface and have n point (x
i, y
i), (i=1,2 ... and have Z n),
i=f (x
i, y
i); Interpolation problem will construct a continuous print function F (x, y) exactly, makes it at (x
k, y
k), (k=1,2 ... n) functional value put is Z
ki.e. Z
k=F (x
k, y
k) (k=1,2 ... n);
Radial basis function is made up of the function of single variable, this basis function form h often of a point (x, y)
k(x, y)=h (d
k), d here
krepresent by point (x, y) to the distance of a kth data point;
In formula, q
k(x, y) is a polynomial basis, and its order is less than m, coefficient a
k, b
ksimultaneous Equations below should be met:
Before in above formula, n equation meets interpolation requirement, and m equation then ensure that polynomial expression precision below, and total m+n equation in two formulas, simultaneous solution, can draw undetermined coefficient.
9. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 1 or 2 or 3, is characterized in that: the concrete steps of three-dimensional rendering are as follows:
Input: the coordinate (x of n point in plane
i, y
i), (i=1,2 ... n), this point set is designated as S;
Export: the triangulation chained list T=(P of n point
1, P
2, P
i) → (P
2, P
i, P
j) →... (P
n-2, P
n-1, P
n);
Side enlarger arithmetic is the core of whole algorithm, is designed to an independently subroutine, parameter P
1, P
2, P
3for three summits of band extended triangular shape,
for band expansion limit;
Step 1: check P
1the limit table of point
if it has
and access times ncount is more than or equal to 2, then return;
Step 2: circulation point chained list PointList, looks for the some P satisfied condition
4, from PointList, get node P successively:
1) judge whether P point is limit
end points, if so, then go to step 2, otherwise continue;
2) P point and P is judged
3whether point lays respectively at limit
both sides, if not, then go to step 2, otherwise continue;
3) the limit table E of P point is checked
p, see in the table of limit whether have P
1, P
2whether point, namely have P
1∈ L
por P
2∈ L
pif have, and the limit access times ncount of one of them is 2, then go to step 2, otherwise continues;
4) calculation level P and some P
1, P
2angulation value ∠ P
1pP
2if there is cos (∠ P
1pP
2) < cos (∠ P
1p ' P
2), wherein P ' is the last point found, then upgrade this value, and the call number of record P point;
5) step 2 is forwarded to.
Step 3: if be recorded to the call number of a P, then continue, otherwise return;
The point P of step 4:P point for finding
4, will with P
1, P
2, P
4for the triangle Δ on summit
ijoin in triangle chained list T, triangle count TriCount cumulative 1;
Step 5: upgrade P respectively
1, P
2, P
4limit table
with P
1the limit table of point
be updated to example:
1) P is traveled through
1the limit table of point
if have
or
then its corresponding limit access times ncount is added 1, otherwise by P
2point or P
4point joins P
1limit table
in, and limit access times ncount is initialized as 1;
2) P is traveled through
1the limit table of point
if the limit access times ncount of all nodes is 2, then by P
1point is rejected from a chain PointList;
3) use the same method renewal P
2point and P
4point;
In coal yard coal stocktaking system, require a few features point only measuring dump surface profile, then the three-dimensional data points applying these clouds simulates the surface profile of dump, and show on computers, the spatial topotaxy of these these points of will seeking knowledge, characterize actual curved surface with the triangle surface of Spatial continual splicing, then interpolation on each triangle surface, to obtain accurate description; So adopting said method can simulate the shape on coal yard surface well, and obtains the coal load quantity of whole coal yard.
10. the circular coal yard 3 D intelligent visual presentation platform based on Unity3D according to claim 6, is characterized in that: user and browser mutual time, the basic operation of user mainly contains:
1. amplify: the local of amplifying figure, be beneficial to the details of observing dump;
2. reduce: reduce figure, be beneficial to hold dump overall;
3. rotate: with coal yard center for initial point, rotate around Y-axis and Z axis, be beneficial to observe coal yard from all directions, all angles;
4. translation: move in parallel image along screen X-direction or Y-direction, is beneficial to choose object observing;
5., in returning: image is returned in initial position, be namely positioned at the central authorities of screen, be user-friendly to;
6. blanking: provide two kinds of grids, the grid after stereoscopic grid and blanking, the grid after blanking more has stereoscopic sensation, is beneficial to observation;
7. the whole audience is drawn: after reading in intermediate input file, after selecting this function from menu or toolbar, starts dynamically to draw dump figure;
8. volume computing: after drafting, provides the coal load quantity of coal yard in the below in screen client district with the form of dialog box;
9. partial points amendment: in order to reflect the details of coal yard image better, provides the function of partial points amendment, makes user according to the actual conditions at scene, can revise figure neatly.
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