Research On Experimental Process Control And Evaluation Model Based On Virtual Reality

The virtual experiment platform is a kind of excellent auxiliary tool for students to master the experimental knowledge and improve experimental operational skills.However,the interaction between users and the traditional virtual experiment platform is simple and the display way is flat,the students get very little help from the traditional virtual experiment platform.Besides most of the traditional virtual experiment platform is only the simulation of experimental phenomena with little experimental process control and evaluation.In order to solve problems mentioned above,this paper put forward a creative corresponding solution.(1)Aiming for improving the flat user experience of the traditional virtual experiment platform,this paper introduces the fully immersed virtual reality technology and builds the immersive virtual reality experimental operation platform based on fully immersed virtual reality.(2)For a simple mouse and keyboard interaction,this article introduced somatosensory control technology to replace the traditional mouse and keyboard operation,the body sensory equipment Leap Motion used specifically for gesture monitoring,and based on Leap Motion and virtual reality,combined the characteristics of the actual experimental operation,this paper defined gesture of experimental operation and the corresponding development process.(3)To solve problems of the traditional virtual experiment platform:the without control and evaluation of the experimental operation flow,this paper firstly analyzes several different experiments and finds out the commonality among them,that is,the corresponding experimental equipment is needed;having a certain order that can be hierarchical;experimental operation will lead to the corresponding experimental phenomenon;experimental operation has a certain running time.On this basis,the experimental operation process and its hierarchical structure were analyzed in details.Then,the descriptive model<P,T,M,D>of the experimental operation flow is given in combination with the Petri net model,and the experimental operation flow model is expressed by the XML markup language.According to the experimental operation flow model,this paper added the corresponding process evaluation and monitoring mode.The core method of monitoring and diagnosis is based on the reachable tree generation algorithm and the depth-first search algorithm.And monitoring and diagnosing the four major problems operation error,operating conditions are not satisfied,the implementation time is wrong,the experimental hints.Finally,this paper constructs the prototype system of the virtual reality experiment platform,and investigates the students' current experiment situation,satisfaction and expectation of the virtual reality experiment platform through the questionnaire.Through the relevant experimental research,Control accuracy and experimental process control evaluation model and its related algorithms were verified.The results of the final experiment show that the satisfaction and expectation of the virtual reality experiment platform are relatively high,and the accuracy of somatosensory control is high,and the experimental process control and evaluation model and its related algorithms are reasonable and effective.