CN104850670A - Medical equipment demonstration system based on virtual reality - Google Patents

Abstract

The invention provides a medical equipment demonstration system based on virtual reality. A logic structure of the system comprises four parts including a client access layer, an access layer, an application layer and an integration layer and adopts a B/S (Browser/Server) architecture, wherein the client access layer is communicated with a WEB server through a firewall of the access layer and adopts 3D graphs to simulate medical equipment. Therefore, clients can visually know the appearances, the sizes and the styles of the equipment. In addition, new models and new technologies can be quickly shown to clients via virtual demonstration, the repulsion psychology of the clients to the new technologies can be eliminated, new model training cost is greatly reduced, operation performance is more optimized, and the medical equipment demonstration system is novel in design, adopts a good design scheme and has a good market popularization prospect and good perception performance.

Description

Based on the Medical Devices demo system of virtual reality

Technical field

The present invention relates to a kind of network drill system, particularly relate to the function being carried out demonstration equipment by 3D graphic modeling Medical Devices.

Background technology

At present, the feature such as large medical equipment involves great expense as X-ray machine, CT, MRI and DR etc. have, bulky, complicated operation, configuration are various.The sale of these equipment is mainly carried color page explanation of visiting by Large Exhibitions and sales force and is recommended, and needs at substantial human and material resources but is difficult to client's direct feel.On the other hand, because main equipment involves great expense, very careful when client buys.Once machine updates, release new technology, be often difficult to be readily accepted by customers, need to drop into a large amount of training costs.And virtual reality technology can the various visual angles of analog machine, operation interface under different configuration, new technology analog demenstration, more intuitively, sales force can be helped, explain equipment training instructor's economical and efficient, reduce a large amount of instrument sales costs.Although network there has been the example of some successful virtual displays, but these virtual displays nearly all only achieve the roaming to virtual exhibition, the angle of not showing from equipment carries out careful design to equipment display function, and mostly showpiece is the picture of two dimension, visitor only can " visit ", and can not carry out interaction with showpiece, make visitor " visible; to can not touch ", also there is a lot of drawbacks, experience to client intuitively.

In sum, for the defect that prior art exists, the special Medical Devices demo system needed based on virtual reality, to solve the deficiencies in the prior art.

Summary of the invention

The object of this invention is to provide the Medical Devices demo system based on virtual reality, by virtual demonstration, new architecture, new technology are showed client soon, eliminate the repulsion psychology of client to new technology, save a large amount of new architecture training costs.

The technical scheme that the present invention adopts for its technical matters of solution is,

Based on the Medical Devices demo system of virtual reality, this system logic structure includes four parts: customer access layer, Access Layer, application layer, conformable layer, and the framework of employing is B/S, and customer access layer is communicated with WEB server by the fire wall of Access Layer;

The database that application layer adopts is VRML data stocks, and application layer includes Medical Devices model management subsystem, the demonstration of Medical Devices model foreground subsystem, Medical Devices modeling operational subsystems, application function subsystem;

Medical Devices model foreground demonstration subsystem carries out identification to the identity of visitor, determine generic access person or registered user, domestic consumer is with regard to accessing database in this way, by interested for user Medical Devices model file and this device-dependent two-dimension picture with introduce Word Input out, and then be reflected in the framework of ASP foreground homepage, client is informed by generating html file by ASP System build, simultaneously demo system is also by a few money equipment most interested in the access for programming count domestic consumer and some pages of the most often going, automatic generation accessed web page buffer memory, to accelerate the access efficiency improving user, for registration visitor, demonstration subsystem in foreground the personalization of record access person can browse custom, automatic adjustment reality general layout is to meet the access habits of viewer, and provide the simulation of equipment operating for visitor, the interactive operation interfaces such as equipment appearance improvement, and in time the feedback opinion of user to equipment use can be submitted to back-stage management person,

Medical Devices model management subsystem carries out unified storage to designing the vrml file of deriving generation by 3DS MAX, upload, issue and manage, improve the maintainability of Medical Devices demo system, eliminate platform restriction, reduce maintenance cost, improve design efficiency, shorten the design cycle;

Medical Devices modeling operational subsystems is the combination utilizing VRML language and JAVA language, for user provides an interface mutual with machine on network, this subsystem can help user to amplify instrument, reduces, advances visual angle, change the basic nature functions such as instrument outward appearance, can also provide the interactivity requirements that the simulated operation of instrument and equipment, device software demonstration etc. are complicated;

Application function subsystem comprises user management that promising demo system provides, user's registration, log recording, message leaving system.

Further, described Medical Devices model management subsystem includes the retrieval of device model, the uploading of device model, the deletion of device model, the issue of device model;

Device model retrieval, when the model data of Medical Devices is many, can retrieve certain device model of quick position by management system, and retrieval module provides and carries out by key words such as device name, device type, file names the function retrieved;

Device model upload at the Medical Devices model designed after deriving and optimizing, can upload in WEB server by management system is unified, and set up index, facilitate the Medical Devices model that Medical Devices demo system upgrades in time new;

The deletion of device model, when certain Medical Devices stops production or model data is expired, can be easy to delete by this function;

The maximum difference that this function of the issue of device model and device model are uploaded is: upload on managing and just Medical Devices model data being uploaded onto the server, the foreground of not making this model is shown, and issue has this function, the main function of such design, after facilitating data manager to import data in batch, does background audit to related data.

Further, user's registration of described application function subsystem is the function that system provides domestic consumer to register, uniform registration can be carried out before user uses, the user profile of registration will be unifiedly stored in database, managed by systematic unity, login name (must fill out) will be inputted when user registers, password (must fill out), user's name, post, office telephone, company faxes, mobile phone, Email, QQ, MSN, the information such as home phone number, when user registers, first must fill in enrollment form, fill in complete user name, after the information such as password, submission system is verified, if user and information legal, then by user stored in system,

User management is unified maintenance system all uses account mainly, major function comprise Add User, revise user, delete user, inquiring user, user sequence, user in system generally includes domestic consumer, organization administrator and system manager three class user, domestic consumer mainly uses the user of system, organization administrator and system manager are the users of management system, the all mechanisms of system manager's ALARA Principle, and organization administrator manages the machine and subordinate's clamp mechanism;

Log recording establishes for data security, mainly can play and each system user is monitored and record in real time, can register system user after logging in native system, the concrete operations which changes database data are made, this module is being stored in the Operation Log table of database in a text form to any operation of data in database, individual user's malicious attack can be prevented like this and destroyed data but grab less than assailant, thus having ensured the safety of the data in database;

Message leaving system facilitates user to do operation and the exchange of technology of internal system, and message leaving system exchanges while interface, also for back-stage management person provides management interface providing for visitor.

Further, the 3D prototype software that native system adopts is 3DS MAX, and statistical conversion flow process is:

1,3DS MAX software is used to carry out the modelling of Medical Devices;

If it is mutual that Medical Devices and the visitor of 2 designs have in use, the demonstration as these Medical Devices can allow user open the switch of instrument, changes the operations such as the color of equipment, just uses 3DS MAX[Create] Helpers plug-in unit derivation on panel;

If the Medical Devices of 3 designs need for visitor provides simulated operation to demonstrate, demonstration as Medical Devices can open machine switch, enter machine working interface, and use certain operating function of working interface, just need to use expert form transform software DEEP.EXPLORATION.V5 to carry out format conversion;

4, according to the complexity of operation, can also in conjunction with VRML PAD software for editing, manual modification correlation parameter, reaches the object that demonstration instrument operation uses.

Further, the compression process of VRML model data is:

1, Polygon counter is used to make the model of establishment can not exceed estimated face number when using 3DS MAX modeling, utilize four kinds of prototype structure nodes of VRML as far as possible, reduce segments, delete hidden surface as much as possible, using instance (Instances) these technology to reduce modelling is the data volume produced;

If 2 aforesaid ways reduce the DeGrain of data, the VRML that can arrange 3DS MAX derives the optimum configurations of dialog box, need not choose the Normals parameter and Indentation parameter that increase document size;

3, VRML Pad software for editing is next used again to edit the .WRL file of derivation, click " file (the F) " menu in menu bar, select wherein " saving as (A) ... " order, selected " (C) is preserved in compression " option is noted in " saving as " dialog box ejected, after clicking " preserving (S) " button, can complete and the optimization of vrml file is compressed;

If 4 through above-mentioned steps sensation vrml file still undesirable words, will consider to utilize special compressed software, compressed software special on network is many, such as wingz, Gzip, IMO(Internet Model Optimizer) etc. carry out the compression of file;

5, after above-mentioned steps, the Medical Devices model file designed by 3DS MAX just can become very little, substantially meets the displaying requirement of network.

The invention has the advantages that, this system sets up the network drill system of the large medical equipment of a B/S structure based on the virtual reality technology of VRML, adopts 3D graphic modeling Medical Devices.This not only can make client recognize the outward appearance of these equipment, size and pattern intuitively, and by virtual demonstration, new architecture, new technology are showed client soon, eliminate the repulsion psychology of client to new technology, save in a large amount of new architecture training cost operating performance and more optimize, novel in design, be a good design proposal, have very much marketing prospect, and organoleptic properties be excellent.

Accompanying drawing explanation

The present invention is described in detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is that the present invention proposes configuration diagram;

Fig. 2 is the process flow diagram that three-dimensional modeling data of the present invention is derived;

Fig. 3 is VRML model data compression process figure of the present invention;

Embodiment

The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with diagram and specific embodiment, setting forth the present invention further.

As shown in Figure 1, there is shown, the Medical Devices demo system based on virtual reality that the present invention proposes, based on the Medical Devices demo system of virtual reality, this system logic structure includes four parts: customer access layer, Access Layer, application layer, conformable layer, the framework adopted is B/S, and customer access layer is communicated with WEB server by the fire wall of Access Layer;

The database that application layer adopts is VRML data stocks, and application layer includes Medical Devices model management subsystem, the demonstration of Medical Devices model foreground subsystem, Medical Devices modeling operational subsystems, application function subsystem;

Medical Devices model foreground demonstration subsystem carries out identification to the identity of visitor, determine generic access person or registered user, domestic consumer is with regard to accessing database in this way, by interested for user Medical Devices model file and this device-dependent two-dimension picture with introduce Word Input out, and then be reflected in the framework of ASP foreground homepage, client is informed by generating html file by ASP System build, simultaneously demo system is also by a few money equipment most interested in the access for programming count domestic consumer and some pages of the most often going, automatic generation accessed web page buffer memory, to accelerate the access efficiency improving user, for registration visitor, demonstration subsystem in foreground the personalization of record access person can browse custom, automatic adjustment reality general layout is to meet the access habits of viewer, and provide the simulation of equipment operating for visitor, the interactive operation interfaces such as equipment appearance improvement, and in time the feedback opinion of user to equipment use can be submitted to back-stage management person, just hope by Medical Devices demo system for those, to purchase of equipment being a visitor understood simultaneously.Demonstration subsystem provides a kind of mode of demonstrating to the performance parameters instructing client to fully understand equipment, and it has the effect playing a set of filstrip.This literary grace realizes demonstration navigation with the following method, namely makes some path animations, allows system cruise in the VRML world with user, and demonstrate certain operations in conjunction with JAVA Script.The both hands of liberation visitor, make visitor when without the need to when any operation easily freely to Medical Devices have one comprehensively cognitive and understand, Medical Devices model foreground demonstration subsystem is except having the application function for visitor, also there is measuring ability, but when visitor does not possess the viewing conditions of access VRML, automatically can provide prompting, and after prompting, help user installation simulated environment plug-in unit, allow client that rear access is installed.

These Medical Devices model foreground demonstration subsystem has following advantage relative to the respective modules in other demo system:

1, automatic visitor's resolution characteristic, can provide personalized and browse demand for different visitors, browse custom such as according to user, automatically recommends to browse similar equipment with user and observes access for user.

2, provide the interactive interface of instrument and equipment and visitor, facilitate user to carry out simulated operation to Medical Devices, the functions such as the appearance customization of participation device.

3, the search function of Medical Devices model is provided, facilitates user to observe the Medical Devices of different model of the same type simultaneously.

4, for conventional access customer, foreground demonstration subsystem can also provide a kind of navigation feature of automatic demonstrating, helps non-professional equipment procurement staff, detailed, comprehensive functional configuration and the relevant operation use understanding instrument.

Medical Devices model management subsystem carries out unified storage to designing the vrml file of deriving generation by 3DS MAX, upload, issue and manage, improve the maintainability of Medical Devices demo system, eliminate platform restriction, reduce maintenance cost, improve design efficiency, shorten the design cycle;

Medical Devices modeling operational subsystems is the combination utilizing VRML language and JAVA language, for user provides an interface mutual with machine on network, this subsystem can help user to amplify instrument, reduces, advances visual angle, change the basic nature functions such as instrument outward appearance, can also provide the interactivity requirements that the simulated operation of instrument and equipment, device software demonstration etc. are complicated;

Application function subsystem comprises user management that promising demo system provides, user's registration, log recording, message leaving system.

It is one of the development trend in product introduction future that equipment demonstration system combines with virtual reality.Go back the neither one Medical Devices demo system based on virtual reality truly at present, therefore before carrying out concrete demand analysis, need the functional requirement of first analytic system,

In order to better help the product of medicine equipment businessman and producer's publicity oneself, utilizing virtual reality technology, helping the observation Medical Devices of user's all-dimensional multi-angle.Help businessman to reduce the input of manpower and materials, reduce costs, raise the efficiency.In order to save the cost of enterprise, simultaneously also in order to save the time and efforts of visitor, make people just can recognize the parameter information of Medical Devices by computer and network.So based on the Medical Devices display systems of virtual reality, the effect of the following aspects should be had:

The property immersed of Medical Devices demo system: Medical Devices demo system makes visitor put into the sense of having gone " on the spot in person " in the virtual display scene of Practical computer teaching, really place oneself in the midst of a Medical Devices side seemingly to carry out observing and operating, no longer be confined to the conventional means such as two-dimension picture and character introduction on conventional website, but from many-sided enthusiasm transferring visitor such as vision, the sense of hearing and sensation; Utilize Medical Devices demo system, make user's first time really can the observation Medical Devices of omnibearing, all angles.Change the plane introduction that user in the past can only see product, and can not be three-dimensional have deep understanding to product.

The interactivity of Medical Devices demo system: the various objects in visitor and Medical Devices demo system interact.The information that visitor experiences in virtual product introduction, through thinking and the analysis of brain, form the action and strategy oneself wanting to implement, system is fed back to by inputting interface, realize the function run with the mutual and independent control system of virtual demo system, Intemet realizes the mutual of exhibiting product, enables the on-line operation carrying out product that user is real-time, truly achieve the theory of product behaviour design.Changing user can not long-range present situation of product being carried out to simulated operation.

The imagination of Medical Devices demo system: Medical Devices demo system makes visitor be immersed in virtual display space, obtain much information, and obtain knowledge in all directions by thought processes such as association, reasoning and Logic judgment, along with the running status of display systems changes, association is carried out to the future development of display systems motion, to obtain more knowledge, the movement mechanism being familiar with the profound level of Medical Devices and regularity, doctor is helped to understand instrument state-of-the-art technology.

The opening of Medical Devices demo system: Medical Devices demo system is a kind of opening, freely activity form more.Displaying itself is a kind of opening, movable freely, it attract numerous visitors come study, visit, exchange, and virtual display ratio in displaying, there is more open, form more freely.Such as, visitor stays at home or other any territorial scope can enter spacial flex by network, carries out visiting, exchanging; The number of virtual display to visitor does not limit, and the audient of exhibition is wider general; Virtual display is not by the restriction of time, and visitor can arrange the access time according to the work and rest custom of oneself and not worry missing excellent displaying.

And Medical Devices model management subsystem includes the retrieval of device model, the uploading of device model, the deletion of device model, the issue of device model;

Device model retrieval, when the model data of Medical Devices is many, can retrieve certain device model of quick position by management system, and retrieval module provides and carries out by key words such as device name, device type, file names the function retrieved;

Device model upload at the Medical Devices model designed after deriving and optimizing, can upload in WEB server by management system is unified, and set up index, facilitate the Medical Devices model that Medical Devices demo system upgrades in time new;

The deletion of device model, when certain Medical Devices stops production or model data is expired, can be easy to delete by this function;

The maximum difference that this function of the issue of device model and device model are uploaded is: upload on managing and just Medical Devices model data being uploaded onto the server, the foreground of not making this model is shown, and issue has this function, the main function of such design, after facilitating data manager to import data in batch, does background audit to related data.

After logging in, managerial personnel can check in the Medical Devices model data in storehouse easily, and the correlation parameter of real time modifying model, as equipment size, weight, configuration etc.The annotation of equipment can also be added, the speciality parameter of two-dimension picture and Medical Devices

The Medical Devices model management subsystem of Medical Devices demo system mainly contains following advantage:

1, cross-platform

The maximum advantage of this management system is can on any computer platform, by the mode of the accesses network Medical Devices model data freely efficiently in management system.

2, maintenance cost is low

Can whenever and wherever possible, conveniently importing, managed care device model, greatly reduce the operation requirements to personnel, decrease human cost.

3, Medical Devices model can be retrieved

By the backstage search function of management system, supvr can be allowed to manage a large amount of Medical Devices model files easily, make management work easily enjoyable.

In addition, user's registration of application function subsystem is the function that system provides domestic consumer to register, uniform registration can be carried out before user uses, the user profile of registration will be unifiedly stored in database, managed by systematic unity, login name (must fill out) will be inputted when user registers, password (must fill out), user's name, post, office telephone, company faxes, mobile phone, Email, QQ, MSN, the information such as home phone number, when user registers, first must fill in enrollment form, fill in complete user name, after the information such as password, submission system is verified, if user and information legal, then by user stored in system,

User management is unified maintenance system all uses account mainly, major function comprise Add User, revise user, delete user, inquiring user, user sequence, user in system generally includes domestic consumer, organization administrator and system manager three class user, domestic consumer mainly uses the user of system, organization administrator and system manager are the users of management system, the all mechanisms of system manager's ALARA Principle, and organization administrator manages the machine and subordinate's clamp mechanism;

Log recording establishes for data security, mainly can play and each system user is monitored and record in real time, can register system user after logging in native system, the concrete operations which changes database data are made, this module is being stored in the Operation Log table of database in a text form to any operation of data in database, individual user's malicious attack can be prevented like this and destroyed data but grab less than assailant, thus having ensured the safety of the data in database;

Message leaving system facilitates user to do operation and the exchange of technology of internal system, and message leaving system exchanges while interface, also for back-stage management person provides management interface providing for visitor.

Medical Devices demo system system adopts C/S framework, designer completes the design to Medical Devices model by Modling model in PC, then by interface routine, Medical Devices model conversion is become vrml file, add the control of external program, to realize mutual function, the Data Integration of this three part is got up, uploads onto the server.When visitor sends request to server, from server, data are downloaded in PC, then carry out real-time rendering by browser to model, at this moment, the computer of visitor just becomes a desktop virtual reality system, can carry out virtual roaming and visit.

The virtual display scene of structure is as a virtual demo platform, and can to viewer with sense of reality on the spot in person.Be different from traditional Exhibition Design design sketch, it simulates the instrument and equipment in reality completely.Visitor can arbitrarily angledly in virtual scene check, real-time, interactive, and it is not a static world, but an opening, interactive equipment show surroundings.According to analysis, the real needs analytic induction of client to virtual demo system is following a few part:

Set up Medical Devices demonstration module: this module is the nucleus module of native system, determine the life cycle of Medical Devices demo system, so functionally forward-looking.Module should be able to extract the three-dimensional modeling data of Medical Devices automatically by background data base, and the correlation parameter of this equipment and functional characteristic.And these data are submitted to server according to browsing after arrangement layout is carried out in requirement of client, then browsed from server download by client.This module can the demand different according to client provide the automatic demonstrating function of product, simulated operation function and parameter to introduce function.This module according to the individual demand logging in client, can also provide the product demonstration mode that applicable client access is accustomed to.As normal client only wishes to learn about the outward appearance of these Medical Devices, major parameter and machine-dependent feature before purchase of equipment, do not need analog demenstration and the appearance customization function of machine.Module automatically generates navigation page after determined the identity of visitor, extracts the interested related data of client, to save the access time, and reduces the load of server.Registered client then can customize demo system according to personal like and provide simulated operation function or device customizing function for it.

Model data back-stage management: the VRML data of the Medical Devices model of deriving from 3DS MAX system are after overcompression process, and unification is transferred to model data Back Administration Module to process.The function that this module mainly completes unified defines memory location for device model data, the data such as the correlation parameter information of associate device, picture and function introduction.For back-stage management person provides the interpolation of Medical Devices model data, deletion, the conventional func such as retrieval and issue, for the function that supvr provides registered user to manage, as the deletion of registered user, locking, backstage batch add and registered user's Operation Log the function such as to check, for the function that supvr provides registered user to manage, as the deletion of registered user, locking, backstage batch add and registered user's Operation Log the function such as to check.

The simulation of medical equipment operation: in order to embody the interactivity of Medical Devices demo system, native system is also for user provides the simulation of medical equipment associative operation, this interface of simulated operation that user can be provided by demo system, enter Virtual Space and operate virtual Medical Devices, the operation of study Medical Devices uses, and grasps the operating process of Medical Devices.Before hospital also non-erecting equipment, grasp New function and the new technology of these Medical Devices in advance.Help sales force comprehensively understand to client one when introducing equipment, make client not only can investigate the hardware outward appearance needing purchase of equipment, the software application of machine can also be recognized, thus to equipment make one notarization, comprehensively evaluate.

Integrated user registers, logs in and leave a message: system also provides the registering functional of domestic consumer, after registration, the related registration information of domestic consumer will submit to keeper's checking, as being verified domestic consumer, upgrading is become registered user, register flow path, and have the functions such as equipment simulating operation and instrument personalized customization.Oneself opinions and suggestions to product can be expressed by message leaving system by domestic consumer, and registered user can be exchanged with keeper in real time by message in system.Medical Devices demo system additionally provides the functional columns such as friendship contact and announcement board to enrich the friendly interface of system simultaneously.

Before VRML produces, people to the most Three-dimensional Design Software by means of specialty of the 3-D Moulding Design of equipment, as softwares such as famous 3DS MAX, Soft Image, MAYA, Pro E.Wherein 3DS MAX is exactly a outstanding professional three-dimensional model Software for producing, and it has powerful modeling, animation and plays up function, can create out exquisite three-dimensional model miscellaneous.Just because of its feature such as powerful, easy to use, greatly can improve the modeling efficiency of Medical Devices, mainly discuss herein and utilize 3DS MAX software to carry out product model design, and change into the flow process of vrml file, the 3D prototype software that native system adopts is 3DS MAX, and statistical conversion flow process is: see Fig. 2;

1,3DS MAX software is used to carry out the modelling of Medical Devices;

If it is mutual that Medical Devices and the visitor of 2 designs have in use, the demonstration as these Medical Devices can allow user open the switch of instrument, changes the operations such as the color of equipment, just uses 3DS MAX[Create] Helpers plug-in unit derivation on panel;

If the Medical Devices of 3 designs need for visitor provides simulated operation to demonstrate, demonstration as Medical Devices can open machine switch, enter machine working interface, and use certain operating function of working interface, just need to use expert form transform software DEEP.EXPLORATION.V5 to carry out format conversion;

4, according to the complexity of operation, can also in conjunction with VRML PAD software for editing, manual modification correlation parameter, reaches the object that demonstration instrument operation uses.

After creating VRML Medical Devices model, must publish to Web server to deposit to download for user and browse.The length scale of vrml file is directly connected to the length of the time that file transfers to time of client browser from server, file loads on a web browser.The opening of file due to VRML language of wrl form and the standardization of coding, cause the data volume of 3DS MAX generation model file larger comparatively speaking, be unfavorable for the Internet Transmission of file, so be optimized file again after completing the creation of VRML model and compress that to be the compression process of very necessary VRML model data be, see Fig. 3:

1, Polygon counter is used to make the model of establishment can not exceed estimated face number when using 3DS MAX modeling, utilize four kinds of prototype structure nodes of VRML as far as possible, reduce segments, delete hidden surface as much as possible, using instance (Instances) these technology to reduce modelling is the data volume produced;

If 2 aforesaid ways reduce the DeGrain of data, the VRML that can arrange 3DS MAX derives the optimum configurations of dialog box, need not choose the Normals parameter and Indentation parameter that increase document size;

3, VRML Pad software for editing is next used again to edit the .WRL file of derivation, click " file (the F) " menu in menu bar, select wherein " saving as (A) ... " order, selected " (C) is preserved in compression " option is noted in " saving as " dialog box ejected, after clicking " preserving (S) " button, can complete and the optimization of vrml file is compressed;

If 4 through above-mentioned steps sensation vrml file still undesirable words, will consider to utilize special compressed software, compressed software special on network is many, such as wingz, Gzip, IMO(Internet Model Optimizer) etc. carry out the compression of file;

5, after above-mentioned steps, the Medical Devices model file designed by 3DS MAX just can become very little, meets the displaying requirement of network.

When user roams and observes product model in virtual Medical Devices demo system, usually all require can and and product model effectively interactive, as opened the switch of equipment, rotary apparatus, change the appearance color etc. of instrument.But the node of a lot of opertaing device logic event is not provided in VRML, complicated equipment operating logic can not be controlled, so scene can only be controlled by external program, to realize such function.Concrete model demonstration interactive controlling techniqueflow is analyzed as follows:

1, use that CylinderSensor node in VRML language, PlaneSensor node, SphereSensor node, ProximitySensor node, TouchSensor node complete simple rotation to Medical Devices model, movement, click change the functions such as color.

2, the operation simulation for complexity demonstrates the mode that JAVA and VRML can be adopted to combine, and this needs to use the Script node in VRML.

If 3 need the simulated operation of real-time Medical Devices mutual, this mode of EAI is just needed to carry out alternately with Objects scene.EAI is then mainly used to provide the ability communicated mutually with external environment condition, obtains node and event structure, use EAI to take Applet as carrier from VRML browser outside.

Medical Devices demo system interactive controlling:

The interaction mechanism of RML own cannot build a Medical Devices interactive demonstration, because VRML itself can not complete the essential characteristic such as turnover, branch, circulation in ordinary procedure design.Therefore, in actual medical devices Demonstration system design, the powerful network programming ability that Java language can be utilized to provide, writes and to communicate with remote system and the application program of the function such as sharing capability process.The all supports of Java to VRML are all passed through additional encapsulation class and are realized.By these classes, java applet just can access VRML scene, acceptance and transmission event, obtain VRML object etc. from the page, realizes the control completely to VRML scene.VRML and Java is combined, just can overcome some defects of VRML, be supplied to more abundant, man-machine interaction easily between user and VRML scene, meet the requirement of complication system.According to the difference of access mode, can be divided into again: Script Programming interface SAI (Script Authoring Interface) is mutual mutual with outside DLL (dynamic link library) EAI (EAI External Authoring Interface), the method difference that these two kinds mechanism realizes, but the function realized is the same substantially.

Sensor node is used to realize simple interactive controlling:

The ability utilizing sensor (Sensor) node binding events path ROUTE/TO structure to be provided in VRML to go out transmission event (Event) between node to realize simple interactivity, as the dragging to Medical Devices, rotation etc.

Script Programming interface SAI is used to realize interactive controlling:

Namely use case mechanism and route utilize Script node to realize the mutual of VRML and Java (or JavaScript) to SAI alternately.First, by eventIn event reached the script in Script node; Secondly, call corresponding java class (or JavaScript) in the script in Script node and process; Finally, by eventOut, result is sent back to VRML scene to realize animation or mutual.

The Script node of VRML is a kind of node controlling sensor and interpolater, can be defined and change outward appearance and the behavior of object in scene by it.The URL territory of Script node can comprise a JavaClass of one section of JavaScript program or link.SCRIPT node can be placed on scene Anywhere, names it with DEF, thus the deletion completing event becomes to transmit.The field of SCRIPT node is extended by user, and the field arriving these fields can move on to automatically with in SCRIPT node relative program.In addition, SCRIPT node also by writing suitable procedure script, dynamically can generate (change) three-dimensional modeling and binding suitable inductor and interpolater.

1, Java is by Script class (vrml.node bag), control VRML node

First, each territory thresholding in definition Script node, arranges route (Route) and makes other node in VRML and Script node contacts.When with Script node associated node generation event, event passes to the eventIn territory of Script node by route, and Script node then finds java class by the address of specifying in url territory.

Then, java class is started working, and that perform at first is initialize() method: at initialize() value in eventIn or field territory in Script node must be obtained in method, or the value in java is returned to the eventOut territory in Script.The method that Script class provides has: getField(fieldName); GetEventIn(eventInName); GetEventOut(eventOutName); FieldName, eventInName, eventOutName as parameter will be consistent with the title defined in Script node, and the subclass (vrml.filed bag) of corresponding Field class is consistent with the various Type types defined in Script node.It provides getValue() and setValue() method.

Moreover, the processEvent(Event p0 provided by Script class) or processEvents(int p0, Event [] p1) method catch Script node transmit event.ProcessEvent and processEvents method is the public input point of all external events.Java applet makes corresponding process by substituting these two methods to event.The getName(of Event class in Vrml bag) method returns event title (this title is identical with the eventInName that this event occurs in Script node), and determine event, thus make corresponding process; The getValue(of Event class) method then returns the example (it is the eventIn territory that this event occurs in Script node) of a ConstField class, ConstField class is the subclass of Field class, it does not have setValue() method, thus can only take out the value in eventIn territory in Script node, and can not revise.

Finally, after all event handlings are complete, program just calls the eventsProcessed(in Script class) method, animation, the various effect such as mutual that access customer is wanted to realize can be added here.Shutdown(in Script class) method realizes leaving the mode of vrml file.

By Script node, the data that energy java routine processes is crossed return to vrml file.By getEventOut(during initialization) setValue(of variable that obtains) value transmit to the eventOut territory of Script node, then passes to each category node in VRML by method by route, complete whole communication process.

2, Java directly revises VRML node by Script node and Node class

By Script node and route, must arrange reference mark in the eventOut territory of Script node again, java program could change vrml file interior joint value simultaneously.When needing when there being mass data to transmit, this arrange method that an eventOut territory adds a route to each data is obviously quite troublesome.Therefore java, proposes the method directly revising node.

Java directly revises the node in scene, still will use Script node.First, when defining Script node, change eventOut territory into field territory, fieldType is defined as SFNode, and concrete form is as follows:

“field SFNode fieldname USE nodeName”。" nodeName " nodename (being named by DEF statement in VRML) for revising, produces the pointer that is pointed to nodeName node by name.By getField(when performing initialization) method obtains an example of corresponding SFNode class, by getValue() method obtains such value, here its value is the example that name is called the Node class of nodeName just, and the method then provided by Node class directly revises node.GetExposedField(String p0), getEventIn(String p0) method, obtain field and the eventIn territory of node respectively, and using result as Field class; The method provided by the subclass of each Field class is again read and settings, will arrange the direct return node of result, and need not arrange route again, thus reaches the object of directly amendment node.

Node class additionally provides getEventOut(String p0) method, can obtain the eventOut territory of node with it, different from the first two method, the result that it obtains is a Field class that can not revise, i.e. the subclasses C onstField class of Field class.Use the method after improving, effectively can reduce code length, save the computing time of vrml file, improve the formation speed of VRML scene.

3, Java directly creates VRML scene by Script node and Browser class

Concrete node be added and be deleted to the value arranging addChindren and removeChindren of Group node can, but also cannot operate route.When have different in a large number and the node that is mutually related will be created in VRML by java time, workload is unthinkable.In order to meet this requirement, Script Similar integral BaseNode (vrml bag) class, defines two method: getBrowser(in BaseNode class) and getType().GetBrowser() method will return the browser residing for BaseNode class.Browser class is present in vrml bag, it provides serial of methods and controls whole vrml file.As:

(1), add and delete route: addRoute(SFNode fromNode, SFStringfromEventOut, SFNode toNode, SFString toEventIn), deleteRoute(SFNodefromNode, SFString fromEventOut, SFNode toNode, SFString toEventIn)

(2), directly VRML:createVrmlFromString(SFString vrmlSyntax is created) (the node grammer that will create in the mode of character string as parameter read-in)

(3), in VRML, respective nodes is set up: createVrmlFromURL(MFString url, SFNode node, SFString event) (parameter of node grammer that provides of the method is placed in the vrml file pointed by url address, browser finds the node that will add by url, it is joined in the eventIn territory that in the node that node parameter specifies, event parameter is specified)

(4), whole vrml file is replaced with the node of specifying: replaceWorld(MFNode nodes)

Current file is replaced: loadURL(MFStringurl, MFString parameter) with another vrml file that url specifies.

Script class performs initialize() method time, obtain browser instances, then processEvent(Event e) method uses said method to set up when performing, amendment VRML scene.By improving, not only vrml file code length reduction, java program code also greatly reduces, and further increases the formation speed of VRML scene.

In Medical Devices demo system, to move up and down emulation in order to display when realizing ultrasonic device three-dimensional demonstration can move freely realization, we must realize it by use location interpolator (PositionInterpolator).First the stroke distances that definition display moves up and down is 354 units, and we are divided into 10 equal portions it.

We can realize moving up and down of Medical Devices, realize motion simulation during three-dimensional demonstration, can also simulate the rotary motion of Medical Devices by that analogy.After being provided with path, three-dimensional demonstration just can along the path set, the animation effect provided is realized at the node of certain regulation, be equipped with music and explanation, can allow user in carefree environment, there is one comprehensively to understand to Medical Devices outward appearance, parameter, eliminate link clicks operation loaded down with trivial details in a large number, improve the interest that consumer product is introduced.

Outside creation interface (External Authoring Interface, EAI) is that VRML carries out with external environment condition communicating, mutual gordian technique.This method is that adopting maximum at present is also that more a kind of VRML and Java combination realizes mutual method.It strengthens VRML scene and external environment condition to write to each other the java class bag high-level with of fusion faculty, is made up of: vrml.external, vrml.external.field, vrml.external.exception 3 parts.EAI makes external program use the event model of VRML to access and node in control VRML scene.Here external program mainly refers to the JavaApplet program be embedded in VRML virtual scene in same webpage.EAI expands the use of VRML, and also make the virtual scene that creates on network more lively, and man-machine interaction is also convenient, real-time is stronger.The essence that EAI programmes carries out mutual process by EAI between JavaApplet and the VRML scene in same html page.Set up the interactive interface between virtual scene by EAI, user can control the object in virtual scene by the JavaApplet embedding Web page, and can arrange complicated user interface control, carries out good information interchange with the external world.

User can realize using mouse drag RGB tri-vitta, then the appearance color changing ultrasonic device is determined in click, and the customization allowing user participate in product appearance comes up, and makes user obtain good interactivity, participates and obtains real enjoyment.Above-mentioned event is detected and passes to Java in VRML scene, is responded by Java.Or be reversed transmission, the irrealizable function of VRML can be realized by Java programming, the change of the appearance color to Medical Devices has been done some and has attempted.

Because in Medical Devices demo system, the model data of equipment is the basic of demo system, if original model data is excessive, or derive the loss that trouble causes information, just making the function of demo system greatly shrink becomes a mere skeleton, so derivation complete for the model file set up in 3DS MAX is reasonably compressed and optimized, be a very important ring in native system design is implemented.Derivation and the compression method of the Medical Devices model data just generated by 3DS MAX are below set forth respectively:

The optimization of model:

Medical Devices in 3DMAX during modeling, attention model design should not be too complicated, usually the face number of object should be limited within 5000-10000.For taking into account real scene effect, following methods can be adopted to be optimized.

1, segments is reduced

The minimizing face the simplest way of quantity reduces segments in built basic body.In 3DMAX, use the default setting of segments in basic body to generate too much face, this will cause surfing slack-off.Therefore, after setting up basic body for VRML scene, should forward in Modify panel and its segments is reset adjustment.

2, parametric modeling is adopted

Under the prerequisite ensureing visual effect, adopt fairly simple model as far as possible, and adopt parametric method to build model as far as possible.Such as adopt Polygon modeling as far as possible, and not adopting non-homogeneous SPL (NURBS) and subdivision curved surface skill modeling (Subdivision Surface), the vrml file using Polygon modeling pattern to export is also easy to be revised in VRML.

3, deletion and hidden surface

If model just operates on vRML browser, from the object of scene, so delete face of cannot see is most simple effective method.Another kind method is hiding unwanted and non-delete.VRMLExportor does not export hiding face, and namely these faces are not as a part for last institute download file.

4, instance is used

Instance is the important method that 3DMAX creates same object.When any one instance changes, other duplicate can change automatically.And the setting of composition instance object surface only defines once in VRML.This method is exactly define a node in VRML in fact, then uses this node of USE command calls.

5, technology is cured in employing, reduces the calculated amount of CPU

When modeling in order to increase the validity of object, often need to arrange a lot of light, such surfing can be very slow, and technology of curing therefore can be selected to reduce the calculated amount of CPU when browsing.Baked mapping technology is also RnederToTexurteS, and be exactly briefly a kind of mode mxa Lighting information being played up pinup picture, the pinup picture after then this being cured pastes the technology of getting back to and going in scene again.

6, derivation dialog box is rationally set

VRML Exporter dialog box has many optimum configurations that can affect file size:

(1) element body final election item: choose this system to try one's best and use the original moulding nodes such as Box and Sphere to create virtual world in output vrml file, thus greatly shorten vrml file length.

(2) indentation final election item: effect is that VRML code is more easily read, but if do not need to see the VRML code generated by indentation, just need not parameter be chosen, the size of file can be reduced so further.If need to process further vrml file, preferably choose this.

(3) normal final election item: effect keeps normal.If select this, keep normal.Due to the face that has when modeling may due to a variety of causes normal in the opposite direction, and the face in VRML plug-in unit default situations laxative remedy alignment is entirely black.Such part face of causing be can't see, and therefore this option should not select.

(4) precision figure place option: be used to specify the dimensional accuracy exporting vrml file spatial modelling, the figure place namely retained after radix point.If do not need BUILDINGS MODELS or other scenes of accurate Calculation, it is also acceptable that precision figure place is reduced to 3 from default value 4.

(5) sample rate parameter: be used to specify the sample rate outputting to animation effect in vrml file from the animation effect 3DMAX scene, unit is 30 frame FPS per second.Sampling rate is set to 30FPS by system usually, but can be also that space mobile animation etc. specifies different sampling rates respectively according to actual conditions.

The compression of model:

Medical Devices select 3DMAX modeling, and 3DMAX is a kind of 3 d modeling software efficiently directly perceived, is combined very good with VRML, three-dimensional model and animation can be exported as VRML form, and information dropout are few.But because 3DMAX is not mainly for VRML's, there are some problems in the middle of actual application, cause the data volume of its document scene larger comparatively speaking, be unfavorable for the Internet Transmission of file, so it is very necessary for being optimized compression to file after completing the creation of VRML scene.Generally there is following several compression method.

1, the volume of transmitted data of VRML virtual scene file is reduced

In VrmlPad, compression can be carried out edited vrml file and store.VrmlPad v2.0 provides two kinds of method compression VRML document scenes: start VrmlPad program, open wrl file to be compressed, click " file (the F) " menu in menu bar, select wherein " saving as (A) ... " order, selected " (C) is preserved in compression " option is noted in " saving as " dialog box ejected, after clicking " preserving (S) " button, can complete and the optimization of vrml file is compressed; Or " file (the F) " menu clicked in VRMLPad menu bar, select wherein " issue (U) ... " order, click confirms " issuing (U) ... " after order, the issue guide of VRMLPad software can be started, complete the issue operation of document scene according to the prompting of issuing guide while, namely complete the optimization compression of this document scene.

2, DEF/USE, PORTO and EXTERNPROTO statement is used to quote

The instance model of identical type often has many nodes to have identical or close physique structure in virtual scene, their physique structure is identical, only there is the difference on position, at this moment this node can be defined with DEF statement, make it to become template model, its form is: DEF node name node type { VRML statement }.To again create this nodal analysis method at diverse location later, with regard to Transform{translation position coordinates USE node name } repeatedly quote this template model and create, thus make program have clear layer, Software engineering design style rational in infrastructure, and repetition and the redundancy of program code can be reduced, to reach simplifying and optimizing document scene.If the model created between template model except different on position except, also have the difference on some attributes, as color, texture, length etc., at this moment just optimize by prototype.PROTO and EXTERNPROTO statement defines the title of new node, territory, thresholding, event and node body, once define user's new node, just can use it as use VRML standard nodes.

3, data-optimized

When virtual scene complexity to a certain extent, data volume is therebetween appreciable, the storage of data and computing also become very heavy [15], therefore when not affecting the visual effect that virtual scene shows in a browser, are necessary to be optimized data.One method rounds data, and another kind of method is to data fixed precision, and unnecessary part is by deleted.By virtual scene from (as the building virtual scene set up under 3DS MAX environment being converted into the file layout of wrl) in a software environment imports to another software environment, the instrument imported can produce too high precision, make data too redundancy and huge, therefore the optimization compression of data is just extremely important.

4, special compressed software is utilized

At present, compressed software special on network is many, such as wingz, Gzip, IMO(Internet Model Optimizer) etc.Because VRML document scene preserves in the mode of plain text, therefore all in file nulls, space are all saved, add the length of file, so, in order to obtain larger compression potentiality, before with special compressed software compression vrml file, except necessity annotation, in order to except ensureing that the readability of program and the space that stays need to retain, the blank spaces that other is unnecessary should be eliminated.The VRML document scene after compression directly can be browsed by browser.

The operation of Medical Devices demo system:

Under ASP environment, based on the Medical Devices demo system that virtual reality builds, achieve strange land to browse Medical Devices model, obtain the correlation parameter information of Medical Devices, meet the demand of user greatly, also become the platform that different user exchanges in technology, thinking etc. simultaneously.First be to log in before entering system, new user needs by being registered as member.After entering system faced by user is exactly a system homepage having rich content.

Model of place adds Medical Devices model, make data volume larger, so take the way of subregion in this example, the medical equipment classification needing to show, the corresponding corresponding database of each class, when clicking image area, is just loaded into the model bank of X-ray machine, DR, the equipment such as ultrasonic, when clicking image area, be just loaded into the model bank of the equipment such as X-ray machine, ultrasonic, DR.Can clearly guide potential user optionally to visit like this, also can reduce unnecessary Data import, raise the efficiency,

When member checks these Medical Devices demo system by the mode logged in, system uses on interface by automatically switching to after the identity of database identification login user, and the personalization meeting client when three-dimensional demonstration is browsed.When user individual browses Medical Devices demo system, system is also by the interactive controlling of JAVA and VRML, allow user can carry out the configuration of equipment for customizing according to the hobby of oneself, as the CRT monitor of ultrasonic device is replaced to liquid crystal display, or the peripheral hardware utility appliance of Medical Devices is defined according to the actual needs of hospital, and the final demonstrating effect of customization equipment is checked by demo system, and preserved by the result of background program by customization, inform system manager.Allow client just participate at the production initial stage, the equipment that enterprise is produced more can meet the clinical demand of client, improves the market competitiveness of Medical Devices manufacturing enterprise.

Use ultrasonic device as research object in the present system.In Browser, create object, the object of establishment realizes in CbaseObject, CcustmObjeet, CavatorObject.By establishing value to Medical Devices assembly, Medical Devices to be moved, the conversion such as rotation; Obtained the current state of Medical Devices assembly by value, such as values is shift value.And the statement removeChildren.Setvalue (node) in Browser can be utilized to delete the members of Medical Devices in virtual scene, and the apparatus assembly shown in storehouse can be changed.User is after click customization, and device model assembly can combine by Medical Devices demo system automatically, generates new Medical Devices model, for viewer's browsing.

Utilize the embed element of html language can realize the combination of VRML and html language, simpler method is in Dreamweaver MX, by the insertion of ActiveX control, also the combination of plane webpage and wrl document scene can be realized, by 3 D stereo information and two dimensional surface information fusion among same webpage, the form of plane web page portions word, form, video, sound makes an explanation to 3 D stereo scene, illustrates, can produce like this one more lively, true to nature, the virtual reality system that interactivity is stronger.

Due to VRML data standard require user terminal to source code copy carry out based on local resource explain line by line and three-dimensional data immediately write screen, cause client operation to be born heavy, display efficiency is low. slow to the response speed of control command.It is mutual that each node (being in fact with the object model of each order attribute with event interface) simultaneously in VRML Virtual Space is all connected by soft interface the state of realization, and data requirement requires harsh.The extensive collection that Interface Expanding is poor, be unfavorable for data and calculation process.

And require device model can respond user operation efficiently in Medical Devices demo system and data interaction can be carried out with various information source.Explain and immediately write the feature of screen line by line for VRML technical manual, in VRML Virtual Space, volume of transmitted data must be little as far as possible, the least possible to the process workload of operation of information, and these work are placed in other transaction process.So the isolated mode of device model and function software can be adopted when client needs simulated operation equipment.If user operation equipment carries out interactive controlling with regard to using JAVA, if user wants the operation understanding machine software, software simulation interface is directly jumped to by jumping out of node, while not affecting the network bandwidth, user can also carry out online simulation operation like this, understand the usability of instrument, the operating characteristic etc. of new architecture.

Visitor according to the hobby of self, can also select interested type, and further model, carries out in-plant observation.When carrying out close-ups to model, can carry out alternately with model.When leaving, click " page of turning one's head " or with the linking of other showrooms, namely return homepage, or directly enter other exhibition rooms.

Virtual display is opening, freely activity form.Visitor enters virtual display space by network, carries out visiting, exchanging.The number of virtual display to visitor does not limit, and also not by the restriction of time, the time that network exists can extend.

Based on above-mentioned, advantage of the present invention is: this system sets up the network drill system of the large medical equipment of a B/S structure based on the virtual reality technology of VRML, adopts 3D graphic modeling Medical Devices.This not only can make client recognize the outward appearance of these equipment, size and pattern intuitively, and by virtual demonstration, new architecture, new technology are showed client soon, eliminate the repulsion psychology of client to new technology, save in a large amount of new architecture training cost operating performance and more optimize, novel in design, be a good design proposal, have very much marketing prospect, and organoleptic properties be excellent.

More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (5)

1. based on the Medical Devices demo system of virtual reality, it is characterized in that, this system logic structure includes four parts: customer access layer, Access Layer, application layer, conformable layer, and the framework of employing is B/S, and customer access layer is communicated with WEB server by the fire wall of Access Layer;

The database that application layer adopts is VRML data stocks, and application layer includes Medical Devices model management subsystem, the demonstration of Medical Devices model foreground subsystem, Medical Devices modeling operational subsystems, application function subsystem;

Medical Devices model foreground demonstration subsystem carries out identification to the identity of visitor, determine generic access person or registered user, domestic consumer is with regard to accessing database in this way, by interested for user Medical Devices model file and this device-dependent two-dimension picture with introduce Word Input out, and then be reflected in the framework of ASP foreground homepage, client is informed by generating html file by ASP System build, simultaneously demo system is also by a few money equipment most interested in the access for programming count domestic consumer and some pages of the most often going, automatic generation accessed web page buffer memory, to accelerate the access efficiency improving user, for registration visitor, demonstration subsystem in foreground the personalization of record access person can browse custom, automatic adjustment reality general layout is to meet the access habits of viewer, and provide the simulation of equipment operating for visitor, the interactive operation interfaces such as equipment appearance improvement, and in time the feedback opinion of user to equipment use can be submitted to back-stage management person,

Medical Devices model management subsystem carries out unified storage to designing the vrml file of deriving generation by 3DS MAX, upload, issue and manage, improve the maintainability of Medical Devices demo system, eliminate platform restriction, reduce maintenance cost, improve design efficiency, shorten the design cycle;

Medical Devices modeling operational subsystems is the combination utilizing VRML language and JAVA language, for user provides an interface mutual with machine on network, this subsystem can help user to amplify instrument, reduces, advances visual angle, change the basic nature functions such as instrument outward appearance, can also provide the interactivity requirements that the simulated operation of instrument and equipment, device software demonstration etc. are complicated;

Application function subsystem comprises user management that promising demo system provides, user's registration, log recording, message leaving system.

2. the Medical Devices demo system based on virtual reality according to claim 1, it is characterized in that, described Medical Devices model management subsystem includes the retrieval of device model, the uploading of device model, the deletion of device model, the issue of device model;

Device model retrieval, when the model data of Medical Devices is many, can retrieve certain device model of quick position by management system, and retrieval module provides and carries out by key words such as device name, device type, file names the function retrieved;

Device model upload at the Medical Devices model designed after deriving and optimizing, can upload in WEB server by management system is unified, and set up index, facilitate the Medical Devices model that Medical Devices demo system upgrades in time new;

The deletion of device model, when certain Medical Devices stops production or model data is expired, can be easy to delete by this function;

The maximum difference that this function of the issue of device model and device model are uploaded is: upload on managing and just Medical Devices model data being uploaded onto the server, the foreground of not making this model is shown, and issue has this function, the main function of such design, after facilitating data manager to import data in batch, does background audit to related data.

3. the Medical Devices demo system based on virtual reality according to claim 1, it is characterized in that, user's registration of described application function subsystem is the function that system provides domestic consumer to register, uniform registration can be carried out before user uses, the user profile of registration will be unifiedly stored in database, managed by systematic unity, login name (must fill out) will be inputted when user registers, password (must fill out), user's name, post, office telephone, company faxes, mobile phone, Email, QQ, MSN, the information such as home phone number, when user registers, first must fill in enrollment form, fill in complete user name, after the information such as password, submission system is verified, if user and information legal, then by user stored in system,

User management is unified maintenance system all uses account mainly, major function comprise Add User, revise user, delete user, inquiring user, user sequence, user in system generally includes domestic consumer, organization administrator and system manager three class user, domestic consumer mainly uses the user of system, organization administrator and system manager are the users of management system, the all mechanisms of system manager's ALARA Principle, and organization administrator manages the machine and subordinate's clamp mechanism;

Log recording establishes for data security, mainly can play and each system user is monitored and record in real time, can register system user after logging in native system, the concrete operations which changes database data are made, this module is being stored in the Operation Log table of database in a text form to any operation of data in database, individual user's malicious attack can be prevented like this and destroyed data but grab less than assailant, thus having ensured the safety of the data in database;

Message leaving system facilitates user to do operation and the exchange of technology of internal system, and message leaving system exchanges while interface, also for back-stage management person provides management interface providing for visitor.

4. the Medical Devices demo system based on virtual reality according to claim 1, is characterized in that, the 3D prototype software that native system adopts is 3DS MAX, and statistical conversion flow process is:

1,3DS MAX software is used to carry out the modelling of Medical Devices;

If it is mutual that Medical Devices and the visitor of 2 designs have in use, the demonstration as these Medical Devices can allow user open the switch of instrument, changes the operations such as the color of equipment, just uses 3DS MAX[Create] Helpers plug-in unit derivation on panel;

If the Medical Devices of 3 designs need for visitor provides simulated operation to demonstrate, demonstration as Medical Devices can open machine switch, enter machine working interface, and use certain operating function of working interface, just need to use expert form transform software DEEP.EXPLORATION.V5 to carry out format conversion;

4, according to the complexity of operation, can also in conjunction with VRML PAD software for editing, manual modification correlation parameter, reaches the object that demonstration instrument operation uses.

5. the Medical Devices demo system based on virtual reality according to claim 1, is characterized in that, the compression process of VRML model data is:

1, Polygon counter is used to make the model of establishment can not exceed estimated face number when using 3DS MAX modeling, utilize four kinds of prototype structure nodes of VRML as far as possible, reduce segments, delete hidden surface as much as possible, using instance (Instances) these technology to reduce modelling is the data volume produced;

If 2 aforesaid ways reduce the DeGrain of data, the VRML that can arrange 3DS MAX derives the optimum configurations of dialog box, need not choose the Normals parameter and Indentation parameter that increase document size;

3, VRML Pad software for editing is next used again to edit the .WRL file of derivation, click " file (the F) " menu in menu bar, select wherein " saving as (A) ... " order, selected " (C) is preserved in compression " option is noted in " saving as " dialog box ejected, after clicking " preserving (S) " button, can complete and the optimization of vrml file is compressed;

If 4 through above-mentioned steps sensation vrml file still undesirable words, will consider to utilize special compressed software, compressed software special on network is many, such as wingz, Gzip, IMO(Internet Model Optimizer) etc. carry out the compression of file;

5, after above-mentioned steps, the Medical Devices model file designed by 3DS MAX just can become very little, substantially meets the displaying requirement of network.