The Optimization Method And Application Of The Interactive Interface Layout Of The Tunnel Rescue VR System

Menu interface has been numerous main carrier interaction of human-computer interaction devices,in the past this interaction mainly two-dimensional planar interaction,but as in recent years,virtual reality VR,augmented reality AR the development and popularization of the 3d imaging techniques such as human-computer interaction way also in gradually by two-dimensional plane click type interact to three-dimensional space to type interaction.But as a result of technology update speed is greater than the present stage for the study of the theory of the three-dimensional space type of interaction,so caused some system based on VR immersion in the defect of user experience,such as in 3 d space interaction,the unreasonable menu layout such as distance or size and so on,will allow the user to produce incommensurate move were dizziness,greatly reduces the interactive task operation performance.Therefore,the layout method of 3d spatial interactive interface that conforms to ergonomics is a topic worth studying.We divide the interaction interface in 3d into two categories: 2d interaction interface in 3d(the interface that operates 2d in 3d)and 3d interaction interface in 3d(the interaction in 3d scene).The application object of this paper is an immersive tunnel rescue training system based on VR technology,which aims to reduce the training cost,improve the training efficiency,expand the training scope,restore the real rescue scene as much as possible,and enhance the communication channels among various workers participating in the training.The system mainly includes two scenarios,the selection of equipment in the equipment library during the preparation stage and the on-site rescue of the tunnel during the rescue stage,both of which involve the above mentioned two forms of interactive interface.For the interaction interface of two-dimensional interface in 3d space,our main purpose is to improve the operation efficiency of virtual interaction interface,integrate the human visual attention mechanism into the virtual interaction interface,and propose an interface optimization model in VR virtual environment based on human visual attention habit.According to the attention mechanism of human vision,the influencing factors in the twodimensional interaction interface,such as the color and spacing of the decision-making interface of rescue plan,as well as the division of the level of human visual attention in the three-dimensional space,are selected,and a functional model with the highest visual attention as the target is established.MATLAB software and genetic algorithm were used to solve the objective function,and then the data was converted into specific interface layout information,which was applied to the 2d tunnel rescue scheme decision interface layout optimization in the VR system.Finally,the optimized interface was evaluated by eye movement experiments,and the feasibility of the model was verified.The optimized interface was more in line with the visual attention mechanism.For the 3d interactive interface in the 3d space--selection of equipment in the rescue equipment warehouse,it is not an interface but a 3d interactive scene.We will construct the operational performance prediction model from three aspects: the dimension of 3d interface,the complexity of interactive tasks and the knowledge structure of users.Firstly,the original Fitts model was added with depth and width dimensions,and then an experiment was designed to explore the influence of the depth,size and motion amplitude of the 3d target on the interaction time,so as to obtain a 3d target pointing interaction model in the virtual scene.Combining with hick-hyman's law and information theory,a time prediction performance model for three-dimensional space interaction is summarized.The model is used to evaluate the operation time of different rescue equipment layout schemes,so as to select the rescue equipment layout scheme with the shortest operation time.This paper presents two different layout optimization methods for two different forms of interactive interfaces in VR virtual environment,and through the application of the interactive interface in VR tunnel rescue training system,the layout of the decision-making interface of the rescue scheme is improved to make it more in line with the visual attention mechanism of human beings.Also,the operation performance was improved by evaluating the operation time of alternative rescue equipment layout plan and obtaining the most efficient layout plan.It is proved that the two schemes can provide a quick and effective research method for user interface researchers and designers.