基于虚拟现实的物理模拟实验系统设计  

Design of physical simulation experiment system based on virtual reality

作　　者：高礼静[1] GAO Lijing(Nanhang Jincheng College,Nanjing 211156,China)

机构地区：[1]南京航空航天大学金城学院,江苏南京211156

出　　处：《现代电子技术》2021年第12期49-52,共4页Modern Electronics Technique

基　　金：国家自然科学基金项目(11505095);南京航空航天大学金城学院项目(2019⁃Y⁃12)。

摘　　要：传统物理模拟实验系统中的图形碰撞检测算法存在一定的局限,计算量巨大,导致人机交互响应时间长,影响上课体验,因此设计一种基于虚拟现实的物理模拟实验系统。系统从硬件和软件两部分进行设计。硬件设计中,主要对数据采集过程中应用到的数据采集卡进行选型与设计。通过对采样速率、数据精度等参数进行综合考量,选择PCI⁃6009DAQ型号数据采集卡,并对接线端子进行分配说明。软件设计中,主要研究二维图形与三维图形的几何变换,分别分析变换矩阵与子矩阵的功能,优化碰撞检测算法,改变包围盒的类型与整体的层次包围盒结构树,增强对物体的紧密性且减少计算量。为了验证该文设计系统在性能上具有一定优越性,设计对比实验,实验结果表明,该文设计的系统与原有系统相比,人机交互响应时间平均能够缩短69.4%。The graphics collision detection algorithm in the traditional physical simulation experiment system has certain limitations,and its calculation amount is huge,which lead to the long human-computer interaction response time and affect the class experience.Therefore,a physical simulation experiment system based on virtual reality is designed.The system is designed from hardware and software respectively.In hardware design,the data acquisition card used in the data acquisition process is selected and designed.After comprehensive consideration of parameters such as sampling rate and data accuracy,the PCI-6009 DAQ model data acquisition card is selected and the wiring terminals are assigned.In software design,the geometric transformation of 2 D graphics and 3 D graphics is mainly researched,the functions of transformation matrix and submatrix are analyzed respectively,the collision detection algorithm is optimized,the type of bounding box and the structure tree of overall hierarchical bounding box are changed,the compactness to the object is enhanced,and the calculated amount is reduced.In order to verify the performance superiority of the designed system,a contrast experiment was designed.The experimental results show that the human-computer interaction response time of the designed system can be shortened by 69.4%on average compared with the original system.

关 键 词：模拟实验 系统设计 虚拟现实 数据采集 碰撞检测 信号输入 对比实验 

分 类 号：TN919-34[电子电信—通信与信息系统] G40[电子电信—信息与通信工程]