CN102542602A - Method for building simulation model capable of mining coal and extracting oil jointly - Google Patents
Method for building simulation model capable of mining coal and extracting oil jointly Download PDFInfo
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Abstract
The invention provides a method for building a simulation model capable of mining coal and extracting oil jointly, which comprises organizing each physical model according to a data structure of a scenario diagram, wherein the physical model is formed by basic pixel units; leading the physical model to a scene to be jointly combined with the scene, setting dynamic scheduling of the physical model, and setting a simulation route for the physical model. The scheme of the method solves the problems that the existing three-dimensional simulation model is large in data amount and slow in processing speed, and a common computer cannot operate.
Description
Technical field
The present invention relates to the modeling technique field, relate in particular to the method for building up that a kind of coal and gas are adopted realistic model altogether.
Background technology
The mining process in colliery and the pump drainage of gas and the process of utilizing have again been reacted whole courses of work in mining area to a great extent.In the prior art, the staff is through being deep into the working condition that actual sinking and drifting face could obtain the mining area in person.The acquisition model of the working condition in this mining area needs a lot of staff, the manpower and materials of labor, and also the renewal of information is very slow, not prompt enough.
In order more intuitively, accurately to react the working condition in whole mining area, prior art utilize method of emulation to coal and gas in the whole mining area altogether the process of adopting carried out modeling.But; Owing to need the data volume of processing huge; Caused computer processing speed slow; And then make that the realistic model of setting up is very high to the hardware requirement of computing machine, and make this coal and gas adopt realistic model altogether and can only run in some high-end computer (like server), improved input cost.
Summary of the invention
The method for building up that the embodiment of the invention provides a kind of coal and gas to adopt realistic model altogether is in order to solve the excessive and problem that processing speed is slow, common computer can't be used that causes of model data amount in the prior art.
The embodiment of the invention provides a kind of coal and gas to adopt the method for building up of realistic model altogether, comprising:
Each solid model is organized according to the data structure of scene graph, and said solid model is made up of element figure unit;
Said solid model is imported to merging each other in the scene;
Dynamic dispatching to said solid model is provided with, and for said solid model the emulation path is set.
The coal of the embodiment of the invention and gas are adopted the method for building up of realistic model altogether, and the mode through three-dimensional artificial shows mining process and the pump drainage of gas and the process of utilizing again in colliery, describes the work in whole mining area from the angle of macroscopic view.Through the technology of virtual reality, the core technology that coal and gas are adopted has altogether been carried out emulation.This three-dimensional artificial service system can intuitively, accurately be expressed the colliery 3D solid.In colliery modelling on the ground, construction recovery process; Simulate three-dimensional mine condition; Carry out that three-dimensional model makes up and visual, no longer requirement must be deep into sinking and drifting face in person, and in office with regard to tangible workplace; Even make the ideal of " mine is not built up with regard to the tour of going into the well as yet " become possibility, can realize the visual and scientific of [underground, production and management.And, overcome that original three-dimensional simulation model data volume is big, processing speed is slow, the problem that common computer can't be moved.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The method for building up process flow diagram that coal that Fig. 1 provides for the embodiment of the invention and gas are adopted realistic model altogether;
The three-dimensional animation layout that Fig. 2 provides for the embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The method for building up process flow diagram that coal that Fig. 1 provides for the embodiment of the invention and gas are adopted realistic model altogether, as shown in Figure 1, this method comprises:
Step 101: each solid model is organized according to the data structure of scene graph;
Wherein, coal and gas adopt altogether that realistic model is made up of the solid model of the on-the-spot entity of a plurality of representatives.
In order to obtain the level traversal and can to realize rejecting, need each solid model be organized according to a kind of spatial data structure based on object space and image space.Spatial data structure wherein is a kind of representation, can geometry data be organized in the three dimensions.This data structure can be used to judge the acceleration inquiry of solid mutual relationship, like trimming algorithm, ray trace etc.In the present embodiment, the tissue of data structure adopts the scene graph method of hierarchical structure, and this structure has nested and characteristics recurrence, can effectively improve inquiry velocity, and computation complexity can be reduced to O (logn) from O (n) usually.And in follow-up scheduling process, scene graph is the hierarchical structure that meets BVH, promptly when upper layer node not within the scheduling scope, all nodes of lower floor can be removed from internal memory automatically, comprise geometric data and data texturing.
Concrete data layout can but be not limited to data layout as follows:
Wherein, in fact this tree has formed a branch of scene graph, and group node has comprised a plurality of leaf nodes; Leaf node is that solid model is split the element figure unit that can't split; Generally can be a series of polygonal combination, possess logical meaning, such as a fan window, an equipment.Can form above-mentioned such data structure to adapt to the follow-up dynamic dispatching mechanism of this method embodiment through the preprocess method in the step 101.
In order to reach the requirement of subsequent dynamic scheduling, graded dispatching, before step 101, can also simplify solid model.Concrete simplification can be according to the model simplification algorithm based on texture; To the outside surface texture of model and the weights influence of color characteristics; The order of edge contraction during adjustment how much is simplified is accomplished according to the standard of the appearance attribute that least influences model when reaching the simplification process.Specifically comprise:
1) solid model being carried out geometry simplifies
The step that solid model is carried out simplifying for how much comprises: scan all points, calculate the metric value on every limit, carry out edge contraction after the ordering; After each folding, recomputate the metric value of newly-generated change, sort again, edge contraction, until completion.Edge contraction is the algorithm that generally adopts in the geometric model simplification, and its whole thinking is: v1 and v2 are two adjacent summits, and they necessarily are in (being triangle surface usually), just two of a line segment end points within the same dough sheet of model.Edge contraction attempts to merge v1 and these two summits of v2 exactly, and the consequence of merging is through much measurement of profile influence to model.Need calculate the sharp-pointed degree of v1 and v2 drift angle separately, this sharp-pointed degree is exactly the priority that folds.Sharp-pointed more summit can not be rejected more.Preferential those milder summits always of rejecting.The edge contraction algorithm is actually an iterative algorithm, and iteration is all rejected some and changed mild relatively summit (being the so not sharp-pointed summit of drift angle) each time, and through iteration repeatedly, model just has been simplified.Wherein the most key is to measure confirming of operator.Adopt the self-defining edge contraction algorithm of measuring operator to simplify geometric model in the present embodiment, considered the attributive character of outward appearance in the simplification process.
Wherein, the Metric value can be passed through following formula (1) calculating:
metric(v1，v2)＝E(v1，v2)×Q(v1，v2) (1)
Q in the formula (1) (v1, v2) for measuring operator, computing method are as shown in the formula shown in (2):
Q(v1，v2)＝K(v1)Q
1+K(v2)Q
2 (2)
Wherein, v1 and v2 represent two adjacent summits respectively, K (degree of crook of v) representing v point curved surface, Q represent summit and all triangle edge square distances and parameter matrix.K in the formula (2) (v) can pass through following formula (3) calculates:
Wherein, N
1(v) represent the set of v neighborhood of a point triangle, θ
iThe angle of the leg-of-mutton drift angle of expression v vertex neighborhood, A (v) representes the leg-of-mutton area sum of v vertex neighborhood.
Because when carrying out the edge contraction operation, along with vertex v 1 merges to vertex v 2, the textural characteristics change information that vertex v 1 is carried can be added in the vertex v 2, therefore, the E in the formula (1) (v1, v2) can pass through following formula (4) and calculate:
E(v1，v2)＝E
diff(v1，v2)+μE
light(v1，v2) (4)
Wherein, E
Diff(v1, v2) expression vertex v 1 and the distance of v2 in theorem in Euclid space have wherein comprised the tolerance to color distance, E
Light(μ representes adjustable coefficient parameter for v1, the color intensity weight on the limit that v2) expression v1 and v2 are corresponding.
E in the formula (4)
Diff(v1, v2) can pass through following formula (5) and calculate:
E
diff(v1，v2)＝α×D(v1，v2)×D
rgb(v1，v2) (5)
Wherein, α representes the coefficient constant, be used to revise D (v1, v2) and D
Rgb(v1, magnitude unit v2).D (v1, the v2) Euclidean distance of expression two vertex v 1 and v2, D
Rgb(v1, v2) distance of expression two vertex v 1 and v2 color space.
E in the formula (4)
Light(v1, v2) can pass through following formula (6) and calculate:
E
light(v1，v2)＝V
light(v1)+V
light(v2) (6)
Wherein, V
Light(the color intensity weight of v) representing vertex v, V
Light(v) can calculate through following formula (7):
Wherein, T
Light(j) the single leg-of-mutton color intensity value of expression can calculate through following formula (8):
T
light(j)＝sumLight(j)×S(Tj)×T(Tj) (7)
Wherein, sumLight (j) is a function, calculates the colouring intensity value sum of triangle j pixel of all in the corresponding region on middle graph; S (j) is the geometric area of triangle j; T (j) is triangle j corresponding leg-of-mutton area on middle graph.
2) texture is simplified
Texture is become 1/4 texture dimensions as second-level model according to uniform zoom; Texture is become 1/16 texture dimensions as three grades of models according to uniform zoom, and the texture that will not meet 2 n power then is scaled to the texture of optimal 2 n power size.
Convert texture format to the dds form by original png, tga, jpg or tif, the internal memory service efficiency when drawing to improve.
Here need to prove, after model is simplified and each solid model organized according to the data structure of scene graph, can also multistage simplified model be arranged on the position of three grades of corresponding nodes of pager.So in follow-up scheduling process; Can utilize the distance value of the pager in the scene graph; Constantly judge the position distance at viewpoint and model bounding box center; Be used for mating the distance of pager, if the viewpoint distance is then read in corresponding geometric model and data texturing less than the distance value that is provided with among the pager from external memory.So just can the type that whole scene is divided into different severity levels be carried out classification and make,, guarantee the efficient of making to solve the best configuration of resource.This polygon is simplified technology provides a kind of effective solution route for dealing with complicated, big data quantity model.Simplify the scene of small, unessential part and far-end in the model, guarantee not seriously distortion of scene content simultaneously.Its role is to produce the level of detail model of object in the scene, improve the speed of playing up of whole scene.
Step 102: pretreated solid model is imported in the scene;
Pretreated solid model imported to after the scene merge each other, forms big scene graph, still overall data structure is immovable.Need to prove that scene is complete drafting content, has comprised a plurality of solid models.
Step 103: the dynamic dispatching to each solid model is provided with;
Wherein, dynamic dispatching can comprise:
1) atural object piecemeal
Face of land XOY plane is divided into N identical grid cell lattice of high wide difference.All atural objects are divided into not commensurate's lattice according to the coordinate of its central point.
2) waiting to play up the ken divides
When the user checked the model under certain ken, the ken to be played up (looking centrum) projected to ground and obtains a polygon.This polygon and all grid cell lattice intersect calculating, and obtain grid cell lattice to be loaded.
3) worker thread loading unit lattice
The dynamic dispatching module starts some background work threads, loads atural object in these grid cell lattice respectively to internal memory.These atural objects can be created into the pager node usually, so that supported by built-in paging scheduling simultaneously.
4) synchronization scenarios figure
The grid block model that has loaded is merged in the scene.Simultaneously, unwanted gridblock is removed out internal memory.
Step 104: for model is provided with the emulation path.
Because the frame animation model that modeling generates in the original 3 d modeling software is the animation model of fixing, and does not have phase angle change, therefore do not see the difference at visual angle.Therefore, in order from different perspectives animation model to be observed, need self-defined path animation with from different view animation models.Self-defined emulation path can self-defined roaming path and reproduction time, the frame switch speed of each frame; Thereby carry out the manual work coupling with original frame animation; Generate various combined animation easily; Adopt middle series of theories and technological emulation, three-dimensional animation layout as shown in Figure 2 altogether in order to performance coal and gas.
1) each frame of data information of the frame animation model among the parsing max makees label for each frame;
2) is set the time (speed) that each path animation frame takies, the mutual setting.
Wherein, can utilize path animation that instrument is set was provided with the time (speed).Need to prove, during platform broadcast path frame, can play the frame among the max simultaneously,, the time (speed) that each path animation frame takies is adjusted according to the match condition of the two.
Need to prove that path animation and frame animation can suspend and continuation through the space bar on the keyboard, can carry out more three-dimension interaction operation this moment, when continuing again, can continue in the frame position of original time-out.
Through the setting in above-mentioned emulation path, can mainly show coal and gas is adopted the following aspects in the process altogether:
1) performing comprehensive coal mining process: represented the process that the machine of adopting is scraped coal and belt feeder transmission coal of combining.Head adopts in layer tunneling process, the production face two lane wide 0～30m in top board top, and the annular region of high 8～25m produces the crack.
2) the rock stratum inbreak of subsiding: represented in the coal mining process the collapsing and lift the generation and the active development process of extrusion process to caving zone, fissure zone, caving zone, bending subsidence band of last protected seam and following protected seam.
3) Y type ventilating system: represented coal and gas and adopted altogether in the process, stayed the reservation in lane, the Y type ventilation circuit of formation through the rock sky;
4) the rock sky stays the lane filled wall: represented through filled wall slip casting and kept the process that the rock sky stays the lane;
5) the free extraction of gas: represented in the coal mining process, the gas of protected seam is by the transition process of attached state to free state, and through the roof and floor layer-through drilling, last protected seam and following protected seam carried out the process of gas pumping.
The method for building up that the embodiment of the invention provides a kind of coal and gas to adopt realistic model altogether, the mode through three-dimensional artificial show mining process and the pump drainage of gas and the process of utilizing again in colliery, describe the work in whole mining area from the angle of macroscopic view.Through the technology of virtual reality, the core technology that coal and gas are adopted has altogether been carried out emulation.This three-dimensional artificial service system can intuitively, accurately be expressed the colliery 3D solid.In colliery modelling on the ground, construction recovery process; Simulate three-dimensional mine condition; Carry out that three-dimensional model makes up and visual, no longer requirement must be deep into sinking and drifting face in person, and in office with regard to tangible workplace; Even make the ideal of " mine is not built up with regard to the tour of going into the well as yet " become possibility, can realize the visual and scientific of [underground, production and management.And, overcome that original three-dimensional simulation model data volume is big, processing speed is slow, the problem that common computer can't be moved.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of programmed instruction; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Device embodiment described above only is schematic; Wherein the unit as the separating component explanation can or can not be physically to separate also; The parts that show as the unit can be or can not be physical locations also; Promptly can be positioned at a place, perhaps also can be distributed at least two NEs.Can realize the purpose of present embodiment scheme according to the needs selection some or all of module wherein of reality.Those of ordinary skills promptly can understand and implement under the situation of not paying performing creative labour.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (6)
1. coal and gas are adopted the method for building up of realistic model altogether, it is characterized in that, comprising:
Each solid model is organized according to the data structure of scene graph, and said solid model is made up of element figure unit;
Said solid model is imported to merging each other in the scene;
Dynamic dispatching to said solid model is provided with, and for said solid model the emulation path is set.
2. method according to claim 1 is characterized in that, said each solid model is organized according to the data structure of scene graph before, also comprise:
Said solid model is carried out geometry simplify, and/or texture is simplified.
3. method according to claim 2 is characterized in that, saidly said solid model is carried out geometry simplifies and to comprise:
Adopt as follows measure operator be Q (v1, v2) carry out how much of edge contraction algorithm and simplify:
Q(v1，v2)＝K(v1)Q
1+K(v2)Q2
Wherein, v1 and v2 be two summits on limit arbitrarily in the presentation-entity model respectively, K (degree of crook of v) representing v point curved surface, Q represent summit and all triangle edge square distances and parameter matrix.
4. method according to claim 2 is characterized in that, saidly said solid model is carried out texture simplifies and to comprise:
The texture uniform zoom of said solid model is become 1/4 texture dimensions as second-level model, the texture uniform zoom of said solid model is become 1/16 texture dimensions as three grades of models.
5. method according to claim 1 is characterized in that, said dynamic dispatching to said solid model is provided with, and comprising:
Face of land XOY plane is divided into N identical grid cell lattice of high wide difference, and all atural object solid models are divided into the different units lattice according to the coordinate of its central point;
The ken to be played up projects to ground and obtains a polygon, and said polygon and all grid cell lattice are intersected calculating, obtains grid cell lattice to be loaded;
Load atural object solid model in the said grid cell lattice to be loaded to internal memory;
The atural object solid model that is loaded into internal memory is merged in the scene.
6. method according to claim 1 is characterized in that, saidly for said solid model the emulation path is set:
Each frame of data information of parse for frame animation model is for each frame is made label;
The time or the speed of each path animation frame are set, arranged in a crossed manner.
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Application publication date: 20120704 |