CN102779215A - Networked three-dimensional hoisting simulation method based on B/S (Browser/Server) framework and cache technology - Google Patents
Networked three-dimensional hoisting simulation method based on B/S (Browser/Server) framework and cache technology Download PDFInfo
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Abstract
The invention discloses a networked three-dimensional hoisting simulation method based on a B/S (Browser/Server) framework and a cache technology. The method comprises the following steps of: realizing the issuing and Web access of a three-dimensional hoisting simulation system under the B/S framework in combination of the three-dimensional network technology under the B/S framework; entering a hoisting simulation platform, initializing the simulation system and the cache information; establishing a crane model and initializing a hoisting point; adding a hoisted object and an obstacle; carrying out automatic routing in combination with the cache information; and ending the hoisting when a hook reaches the hoisting point and the hoisted object is hoisted. By utilizing the method, the problem that an edition is hard to update, the performance of the system can be improved, the data interaction pressure is released, and thus the in-time simulation of the three-dimensional hoisting system on the network becomes more smoothly.
Description
Technical field
The present invention relates to three-dimensional lifting emulation mode, the particularly a kind of three-dimensional lifting of networking emulation mode based on B/S framework and caching technology.
Background technology
Along with development of science and technology and progress, the increasingly sophisticated hanging device scale of lifting environment increases day by day, and the lifting accuracy requirement all the more improves; The lifting demand strengthens gradually; This just need lift emulation in advance, confirms Hoisting Program, thereby guarantees the reliability of lifting operation.Therefore, hoisting simulation system has become the successful key of lifting operation.
At present, many lifting environment still adopt backward manual mode of operation, and precision is not high, slip up easily, not only have the potential safety hazard of lifting accident, and the lifting effect is very undesirable.Mostly lifting emulation under numerous three-dimensional environments is the standalone version desktop software, though can accomplish lifting emulation, Hardware configuration is had relatively high expectations, and version updating and difficulty thereof are not easy to business promotion and exchange with user data very much.Based on the three-dimensional lifting emulation of B/S (Browser/Server, browser/server) framework, version updating is convenient, can be instant, carry out the lifting emulation on the network apace, and have realistic meaning and practical value.
The internet greatly popularize the fast development with network technology, let increasing information and information begin to represent with the mode of webpage issue and exchanges, thereby make the application of three-dimensional network technology in operating mode emulation obtain promoting and progress through the internet.Yet, at home and abroad, a comparatively ripe three-dimensional lifting emulation mode based on the B/S framework does not all appear.Even if other field has similar analogue system based on the B/S framework, also seldom participate in the data interaction on the network, do not relate to caching technology basically.In addition, owing to the lifting simulation process contains the mutual and calculating of lot of data, the simulation velocity of no caching process and slow, simulation result is unsatisfactory.Three-dimensional artificial on the network is to access speed in addition; Response speed and system performance require higher; The pressure of general buffer memory design can't the alleviation effectively data interaction can not satisfy the requirement of lifting emulation, and this just feasible three-dimensional lifting emulation based on B/S framework and buffer memory design has more meaning.
Summary of the invention
Technical matters to be solved by this invention is; Not enough to prior art; A kind of three-dimensional lifting of networking emulation mode based on B/S framework and caching technology is provided, solves the problem of version updating difficulty, improve system performance; Alleviate data interaction pressure, simulate crane lifting operation process exactly.
For solving the problems of the technologies described above, the technical scheme that the present invention adopted is: a kind of three-dimensional lifting of networking emulation mode based on B/S framework and caching technology, and the step of this method is following:
1): combine the three-dimensional network technology under the B/S framework, realize the issue and the web access of three-dimensional hoisting simulation system under the B/S framework;
2): get into the lifting emulation platform, initialization analogue system and cache information thereof;
3): set up the heavy-duty machine model, and the initialization lifting point;
4): add lifting object and barrier;
5): binding cache information, seek the footpath automatically;
6): after suspension hook arrives the lifting point, sling up to lifting object, lifting finishes.
In the step 1), under the pattern of internet request/response, web access is carried out in the systems engineering that the user uses browser that server has been issued.Based on the Web engineering issue of Java3D exploitation, be because the network of Java3D is realized being based on Applet, and the webpage that is distributed on of Applet partly have own independent method.In a html page, edit the Applet mark, the path that compiles good CLASS file in advance is added to goes in this mark, also pass through the concrete running of Java Virtual Machine then by the browser identification marking, together represent this java applet.Through the convert file instrument, convert an Applet into a html file.Through on MyEclipse software, carrying out the editor of Web engineering, show on webpage through Applet (applet) then, issue through the Tomcat server at last, realize the far call of three-dimensional artificial system under the B/S framework.
In the step 2,, chosen two kinds of key messages according to the actual requirement of lifting emulation, specific as follows:
(1) crane key message
Crane is the kernel model of three-dimensional hoisting simulation system, and all operations and emulation all are based upon on the crane model basis, play the important and pivotal role.Because the crane model is comparatively meticulous, many nodes all need the driver of write specialized.In addition, seek the footpath automatically, in the process of accurate operations such as collision detection and lifting emulation, also need participate in the computing of number of complex algorithm.Therefore, the important node information of crane each several part is key message.Following table 1 is the table of choosing of crane part of nodes key message.
Table 1 crane part of nodes key message choose table
| Node name | Realize function | Participate in module |
| The suspension hook node | Hook lifting is with mobile | The suspension hook driver module |
| The principal arm node | The rotation of principal arm is with mobile | The arm driver module |
| The auxiliary node | The rotation of auxiliary is with mobile | The arm driver module |
| The pilothouse node | The pilothouse rotation is with mobile | The pilothouse driver module |
| The oil cylinder node | Moving of oil cylinder | The crane driver module |
| The wheel node | Moving of wheel | The crane driver module |
It is thus clear that the important node of crane is all participated in driver module, be used for moving, rotating of each subdivision of crane, flexible or other actions.Wherein, the suspension hook driver module is only chosen the suspension hook node, and near other nodes the suspension hook are unimportant; The arm driver module is chosen principal arm node and auxiliary node, is used to realize the moving of principal arm and more piece auxiliary, rotation, luffing and stretches; The pilothouse driver module is only chosen the pilothouse node, and the part node around it is the attached child node of pilothouse node, does not belong to key node; The crane driver module is only chosen oil cylinder node and wheel node, these two root nodes that node is a crane, and their mobile meeting makes other node servo-actuated.
In addition, in order further to simplify complicated algorithm, the present invention with the three-dimensional coordinate scope of crane also as key message.For example, when carrying out the operation that lifting object places, can be directly with the key message of crane horizontal coordinate range as a reference, thereby avoid taking place the placement that repeats of a plurality of objects at same position.
(2) lifting object and barrier key message
In any lifting scene, except crane, a lifting object and at least one barrier can be arranged all.They can participate in various lifting simulation processes, and its coordinate position and movement locus all greatly affect the performance of system and the quality of emulation.In order to write down the movement locus of object, and can call object model under the function arbitrarily, nodal information that just must the record object model carries out buffer memory with nodal information as its key message.In addition, general lifting object and barrier all are comparatively regular objects, can choose key message to body form.Regular object in this analogue system is set to spheroid, square, right cylinder, rectangular parallelepiped and cone.Other irregular complex object can pass through the 3D grid division methods, is reduced to a plurality of tangent regular objects.Therefore, lifting object and barrier coordinate position key message need be chosen according to the self attributes of subject.
Step 2) in,, comprise nodal cache design and the design of coordinate buffer memory based on the buffer memory design of key message, specific as follows:
(1) nodal cache design
In three-dimensional scenic, nodal cache mainly comprises branch node and the buffer memory of transform node under the three-dimensional model object, is used to write down each nodal information of crane model and the nodal information of object model.Through nodal cache, make calling of key node information more convenient, need not to participate in the computing of any algorithm, reach the purpose of direct use.
Engineering is when initial launch, and the primary data in the cache information processing module meeting invoking server database is carried out the initialization of nodal cache.When the user need drive three-dimensional model, driver module can send the model object information that drives to the key message processing module, chooses key message.Then, carry out the processing of key message, accomplish nodal cache, and, send relevant node instruction according to disposition by the unification of cache information processing module.Data update module can be exported the nodal information of renewal after receiving more new node instruction, if this information is not empty, then utilize mechanics of communication real-time update database relevant information.In like manner, add the modules such as processing, nodal cache, data communication that also need pass through the choosing of key message, cache information with the design of deletion action, relate to the transmission of instruction and information etc.
(2) coordinate buffer memory design
The coordinate buffer memory is mainly used in the real time position of record cast, and convenient driving being called and calculating with complicated algorithm.Similar with nodal cache, the coordinate buffer memory is mainly participated in the calculating of complicated algorithm, the driving of three-dimensional scene models and the basic operation of hoisting process.Different is that it also relates to choosing of multiple object type, and Data Update is more frequent.
When initialization, data cached initialization module is handled the object model information package in the server database, uploads in the object model storehouse of engineering, has made things convenient for building of object model.In other cases, be example to increase object model.At first the type of decision operation is instructed the additions and deletions model module for adding operation, send to add.Then, call object model information corresponding in the object model storehouse, carry out Unified Treatment by the additions and deletions model module.At last, new model information is sent to database, send to other modules simultaneously and add instruction, accomplish the processing of cache information.In like manner, deletion, the cache information processing of upgrading and driving also must be through above-mentioned several steps.
In the step 3), the foundation of crane model is according to data-interface, utilizes the OpenGL function library, draws out the model of a crane, owing to be the Pro/E derived data, therefore need not pinup picture or texture.
In the step 4),, add appearance node and some no materials and texture node in order to generate diversified lifting object and barrier.Cooperate various materials and texture, also added different basic bodies, comprise square, right cylinder, spheroid etc.For selection and the placement that realizes different objects, on given body, added necessary audiomonitor.
In the step 5), through based on A-STAR algorithm thought seek automatically the footpath algorithm design, concrete steps comprise:
(1) obtains the privileged direction result set
In order to let each all definite object points that moves, this algorithm has been introduced the privileged direction result set, and it is representing the preferential result of four direction.In order to judge whether certain direction is privileged direction, the range difference between adopting at 2 in the specific algorithm is represented, is privileged direction from the nearer both direction of impact point.Finally,, always can obtain two preferential directions, and recorded in the privileged direction result set through distance calculation.
(2) obtain the collision detection result set
Though next step this how to walk, all can not collide with other subject or the crane object in the scene, the collision detection result set is exactly the collision information that is used to write down next step.On the backstage of program, respectively make a move earlier to four direction in advance, according to new coordinate, call collision detection algorithm then, obtain this direction and whether can bump.Through collision detection algorithm, can predict whether next step action can bump at four direction, thereby obtain the collision detection result set, avoid the generation of colliding.
(3) obtain the feasible path result set
This algorithm is provided with the storehouse of two special uses, is used to write down the information in path of passing by.In order not retrace one's steps, avoid seeking that operand is in a place or a scope interior circuit in the process of footpath, program has defined a feasible path result set.On the program backstage, operand can respectively make a move to four direction in advance, obtains the new coordinate of four direction.Each coordinate all can compare with the message loop in the path of passing by, and judges whether the path for having passed by.Through the detection of feasible path algorithm, can predict whether next step action is the path of having passed by at four direction, thereby obtain the feasible path result set, avoid away the path of repetition.
(4), obtain optimal direction according to the sign of rotation position
Obtained after above three result sets, comprehensively compared the result of four direction, can obtain optimum direction set.This direction set often comprises both direction, in this time, just need judge that which direction is more excellent according to the sign of rotation position.Select through comprehensive comparison and sign of rotation position, finally obtained an optimal direction.
(5) choose optimal path
More than four steps can confirm the optimal route in a step, yet, because the effect of sign of rotation position may cause operand to rotate around some farther directions.For the path of choosing, this algorithm at running background twice route searching, once turn clockwise, once be rotated counterclockwise, obtain optimal path.
In the step 6), after seeking the footpath automatically, binding cache information, suspension hook can arrive the lifting point, and lifting object can be sling; When lifting object was sling, lifting finished.
The three-dimensional lifting of networking emulation mode based on B/S framework and caching technology of the present invention; Overcome traditional desktop lifting software version update difficulty; The unusual constant shortcoming of data sync; Utilize the internet as information carrier, truly and easily represent various engineering actual demands, and can design and control action, environment, sound and the lighting effects of three-dimensional scenic and three-dimensional model; In time handle different information in various operating mode, thereby operand is simulated and operated more authentic and validly; Solved the difficult realistic problem of hoisting simulation system version updating, for the application of three-dimensional lifting emulation on network provides available design method, making the user carry out three-dimensional lifting emulation immediately, apace becomes possibility.
Description of drawings
Fig. 1 is one embodiment of the invention process flow diagram;
Fig. 2 is one embodiment of the invention emulation platform figure;
Fig. 3 is that synoptic diagram is selected in one embodiment of the invention sign of rotation position;
Fig. 4 seeks footpath and collision detection analogous diagram automatically for one embodiment of the invention reference position;
Fig. 5 seeks footpath and collision detection analogous diagram automatically when being one embodiment of the invention cut-through thing;
Fig. 6 seeks footpath and collision detection analogous diagram automatically for one embodiment of the invention final position;
Fig. 7 is one embodiment of the invention three-dimensional scenic vertical view;
Wherein:
1: crane; 2: suspension hook; 3: barrier; 4: lifting object.
Embodiment
Below will combine accompanying drawing and specific embodiment that the present invention is explained further details:
Networking three-dimensional lifting emulation mode process flow diagram such as Fig. 1 based on B/S framework and caching technology; Based on the realization of B/S framework, adopt the Java3D technology, in conjunction with the application of Applet applet on Web, be the issue instrument with Tomcat, realized the issue and the web access of the down three-dimensional lifting emulation mode of B/S framework.The exploded view of Fig. 2 emulation platform.Wherein, the crane illustraton of model is to utilize the Pro/E drawing tools crane three-dimensional model that draws, and then with the Pro/E derived data, according to data-interface, utilizes the OpenGL function library, draws out the model of a crane.In like manner, the interpolation of lifting object and barrier is the same with the method for building up of crane model, has just added appearance node and material and texture node that some are different.
Built at emulation platform and to finish, roam operation is opened, and through from cache information, obtaining the suspension hook position, thereby reaches the initialization lifting point.
(1) obtains the privileged direction result set
In order to let each all definite object points that moves, this algorithm has been introduced the privileged direction result set, and it is representing the preferential result of four direction.In order to judge whether certain direction is privileged direction, the range difference between adopting at 2 in the specific algorithm is represented, is privileged direction from the nearer both direction of impact point, and this is that estimated value is the same with A-STAR algorithm picks distance between two points.For example, X coordinate of certain some A deducts the X coordinate of impact point, if be positive number, then shows target on the X axle negative direction that A is ordered, and the A X axle negative direction of ordering then is a privileged direction so, and automatic, X axle positive dirction loses one's prior rights; In like manner, the A Z-direction right of priority of ordering also is like this.Finally,, always can obtain two preferential directions, and recorded in the privileged direction result set through distance calculation.
(2) obtain the collision detection result set
Though next step this how to walk, all can not collide with other subject or the crane object in the scene, the collision detection result set is exactly the collision information that is used to write down next step.On the backstage of program, respectively make a move earlier to four direction in advance, according to new coordinate, call collision detection algorithm then, obtain this direction and whether can bump.Through collision detection algorithm, can predict whether next step action can bump at four direction, thereby obtain the collision detection result set, avoid the generation of colliding.
(3) obtain the feasible path result set
With the A-STAR class of algorithms seemingly, this algorithm also is provided with the storehouse of two special uses, different is, two storehouses here all are to be used to write down the information in path of passing by.This is relevant with the sign of rotation position, and particular content can be set forth in subsequent step in detail.In order not retrace one's steps, avoid seeking that operand is in a place or a scope interior circuit in the process of footpath, program has defined a feasible path result set.On the program backstage, operand can respectively make a move to four direction in advance, obtains the new coordinate of four direction.Each coordinate all can compare with the message loop in the path of passing by, and judges whether the path for having passed by.Through the detection of feasible path algorithm, can predict whether next step action is the path of having passed by at four direction, thereby obtain the feasible path result set, avoid away the path of repetition.
(4), obtain optimal direction according to the sign of rotation position
Obtained after above three result sets, comprehensively compared the result of four direction, can obtain optimum direction set.This direction set often comprises both direction, in this time, just need judge that which direction is more excellent according to the sign of rotation position.The sign of rotation position is used for writing down sense of rotation, 0 expression counter clockwise direction, 1 expression CW.In program, it can let, and a direction improves priority level in a plurality of privileged directions, thereby obtains optimum direction.For example, when the sign of rotation position is 0, i.e. in the time of rotation counterclockwise, suppose that the result is a both direction---X axle negative direction and Z axle positive dirction, Z axle positive dirction is exactly an optimal direction so.Select through comprehensive comparison and sign of rotation position, finally obtained an optimal direction.
(5) choose optimal path
More than four steps can confirm the optimal route in a step, yet, because the effect of sign of rotation position may cause operand to rotate around some farther directions.Like Fig. 3, synoptic diagram is selected in the sign of rotation position, and obviously, route 2 is more reasonable, is optimum path.For the path of choosing, this algorithm at running background twice route searching, once turn clockwise, once be rotated counterclockwise, obtain optimal path.
While binding cache information, lifting object has realized seeking automatically the footpath, and barrier also is placed in the scene, and the arm of crane model and suspension hook have been accomplished driving, prepare that lifting object is carried out lifting and operate.Fig. 4 is for seek footpath and collision detection analogous diagram automatically.Binding cache information realizes lifting browsing of each visual angle in the simulation process through keyboard operation, and Fig. 5 is the three-dimensional scenic vertical view.
According to existing node and the design of coordinate buffer memory, in conjunction with the inner structure and the flow process of complicated algorithm, the complicated algorithm of optimizing and realizing designing based on buffer memory.Then, utilize the Java3D technology, adopt the data structure of figure object and tree construction, realize system cache respectively.
Wherein, be to utilize the design of the buffer memory of system based on the realization of the complicated algorithm of buffer memory design, through analysis and pre-service, can reduce the system overhead of complicated algorithm to data, realize performance optimization to complicated algorithm.
Before carrying out complicated algorithm, at first carry out choosing of key message according to the function that triggers at every turn.Then, handle cache information,, available data and cache information are before done contrast and analyzed, judge whether need carry out Data Update according to function and key message.Update Information if desired, then move complicated algorithm, otherwise, directly relevant key message is carried out buffer memory.When the operation complicated algorithm, in case need call data or nodal information, system can preferentially search for from buffer memory, avoids double counting and unnecessary network data exchange.At last, output data is accomplished this function simulating.This complicated algorithm based on the buffer memory design does not change its inner structure and flow process in itself, has guaranteed the superiority of algorithm.System is through priori or cache information, and whether decision can be avoided complex calculation or avoid double counting, consumes the system overhead of few part, has reduced the number of times and the calculated amount of complex calculation, thereby realizes the optimization of system performance.
Based on the realization of system cache, adopt Key-Value (key-value) to figure object and two kinds of data structures of tree construction, utilize the Java3D technology, realize the design of system cache respectively.The nodal cache design is following with the concrete realization of coordinate buffer memory design:
(1) BTG buffer memory unit and BG, TG cache object
BG and TG cache object are respectively applied for branch node (BranchGroup type) information and transform node (TransformGroup type) information of storage three-dimensional model object.On implementation, the Value value of BG and TG figure object is respectively branch node (BranchGroup type) and transform node (TransformGroup type), and the Key value is an object name.BG and TG tree is a tree root with the branch node and the transform node of world coordinate system then, the sequential build tree construction of building according to node.These nodes mainly are the key message of crane model and the nodal information of regular object.BTG buffer memory unit is one self-defining type, and major function is to bind a TG cache object and the BG cache object corresponding with it, the realization that makes things convenient for the three-dimensional model object to drive.BTG buffer memory unit has adopted the thought that encapsulates in the Object-Oriented Design, not exposed node variable and key message in the time of can externally visiting.In addition, in some complicated algorithms, BTG buffer memory unit can be treated as a data circulation road, is used for the circulation and the data transfer of a plurality of node objects, thereby has saved VO (Value Object, value object) expense.
(2) coordinate buffer memory unit and coordinate cache object
In order to cooperate complicated algorithm, this system design coordinate buffer memory unit, be mainly used in the key message of record rule object.The different rules object, then corresponding different coordinate cache object.In the scene of three-dimensional lifting emulation; The Value value of each coordinate diagram object is all key messages of a corresponding regular object all; The Key value is the name of this object; The then corresponding rule-like object of each tree construction object, the order of adding with this class object makes up, and tree root is first the type object that is added.Because the existence of coordinate buffer memory, system does not need the data interaction of regular object on network basically, has improved the efficient of emulation, has alleviated the pressure of data interaction.
Table 2 is the performance comparison table of three kinds of caching methods, mainly is to the result of three kinds of caching methods on lifting driving, complicated algorithm computing and overall operation situation relatively.Wherein, lifting drives the lifting choose crane arm and drives process, complex calculation then choose based on the collision detection algorithm of bounding box with seek the footpath algorithm automatically based on the A-STAR algorithm.
The performance comparison table of three kinds of cache policies of table 2
Experiment showed, in lifting drive, on complicated algorithm operation and the overall operation speed, have caching system all than no caching system working time still less, travelling speed is faster.Explain that the system of being buffered in is in service, brought into play enormous function, reduced the expense of system, saved working time, improved operational efficiency and simulation velocity.Simultaneously, system cache has reduced the network interaction number of times of data, has alleviated data interaction pressure, makes the overall operation situation more smooth, has reached the requirement of the three-dimensional down lifting emulation of B/S framework fully.
In addition, having under the prerequisite of buffer memory, the performance index difference of different cache policies is less, and only algorithm is superior to the tree construction cache policy to figure target cache strategy on working time seeking directly automatically.This is because the tree construction buffer memory always needs earlier tree construction to be traveled through, and schemes liking a kind of Key-Value to mapping relations, directly reading of data.Therefore, to a certain extent, figure target cache strategy is more suitable for the three-dimensional artificial under the B/S framework.
Claims (5)
1. the networking three-dimensional based on B/S framework and caching technology lifts emulation mode, it is characterized in that the step of this method is following:
1): combine the three-dimensional network technology under the B/S framework, realize the issue and the web access of three-dimensional hoisting simulation system under the B/S framework;
2): get into the lifting emulation platform, initialization analogue system and cache information thereof;
3): set up the heavy-duty machine model, and the initialization lifting point;
4): add lifting object and barrier;
5): binding cache information, seek the footpath automatically;
6): after suspension hook arrives the lifting point, sling up to lifting object, lifting finishes.
2. the three-dimensional lifting of the networking emulation mode based on B/S framework and caching technology according to claim 1; It is characterized in that, in the said step 1), in conjunction with the application of Applet applet on Web; With Tomcat is the issue instrument; Realize the issue of three-dimensional hoisting simulation system under the B/S framework, under the pattern of internet request or response, web access is carried out in the systems engineering that the user uses browser that server has been issued.
3. the three-dimensional lifting of the networking emulation mode based on B/S framework and caching technology according to claim 1; It is characterized in that; Said step 2) in; The process of initialization cache information is: the object model information package in the server database is handled, uploaded in the object model storehouse of engineering.
4. the three-dimensional lifting of the networking emulation mode based on B/S framework and caching technology according to claim 1; It is characterized in that; In the said step 4),, add appearance node and some no materials and texture node in order to generate diversified lifting object and barrier; Cooperate various materials and texture, also added square, right cylinder, spheroid; For selection and the placement that realizes different objects, on given body, added audiomonitor.
5. the three-dimensional lifting of the networking emulation mode based on B/S framework and caching technology according to claim 1 is characterized in that, in the said step 5), adopts the A-STAR method to seek the footpath automatically.
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| CN107010542B (en) * | 2017-04-17 | 2018-08-03 | 山东建筑大学 | A kind of assembled architecture intelligence hanging method |
| CN109650246A (en) * | 2018-11-21 | 2019-04-19 | 上海国际港务(集团)股份有限公司张华浜分公司 | Break bulk cargo loading and unloading capacity simulation system and its analogy method |
| CN109650246B (en) * | 2018-11-21 | 2020-04-10 | 上海国际港务(集团)股份有限公司张华浜分公司 | System and method for simulating loading and unloading process of piece goods |
| CN112181369A (en) * | 2020-09-16 | 2021-01-05 | 中国人民解放军63921部队 | Hoisting process flow simulation modeling method based on object-oriented |
| CN112181369B (en) * | 2020-09-16 | 2023-08-22 | 中国人民解放军63921部队 | Hoisting process flow simulation modeling method based on object-oriented |
| CN112069698A (en) * | 2020-09-27 | 2020-12-11 | 中国化学工程第六建设有限公司 | Hoisting simulation construction method and system based on BIM |
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