主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (9): 1281-1286.

• • 上一篇    下一篇

基于虚拟现实技术的体积雾与能见度研究

王 佐，龚云鹏，麻庭光   

  1. 上海应用技术大学 城市建设与安全工程学院，上海 201418
  • 出版日期:2021-09-15 发布日期:2021-09-15
  • 作者简介:王 佐（1995-），男，河南平顶山人，上海应用技术大学城市建设与安全工程学院硕士研究生，主要从事消防工程与虚拟现实技术研究，上海市奉贤区海泉路100号，201418。

Research on volume fog and visibility based on virtual reality technology

WANG Zuo, GONG Yun-peng, MA Ting-guang   

  1. School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China
  • Online:2021-09-15 Published:2021-09-15

摘要： 在现有体积雾算法的基础上进行改进，基于消光公式在虚拟现实空间渲染烟雾，让消光效果接近现实中的非刺激性烟雾对人眼能见度减弱效果。为虚拟空间下进行应急逃生指示系统的模拟仿真提供有效支持。测试了1 080分辨率、1 440分辨 率头戴式VR显示器对人视敏度和能见度的影响。实验结果表明：低分辨率对人的视敏度有很大影响，但对能见度没有太大影响；在虚拟场景中，改进后的体积雾算法可以使能见度与烟雾消光系数的关系与现实中相符，因此可以测试人眼对火场烟气的视觉感知效果。此研究构建了能见度与火场消光系数的关系，有利于利用FDS的仿真结果在虚拟空间重建符合光学原理的烟气，改进在虚拟火场进行逃生演习的效果。

关键词: 虚拟现实, 体积雾技术, 火场能见度, 虚拟烟气重建, FDS

Abstract: From the volume fog algorithm, the smoke is rendered in the virtual reality space based on the extinction formula, so that the extinction effect is close to that of the non-irritating real smoke in experiments. This research provides effective support for the simulation of emergency exit instruction system in virtual space. This work also tested the impact of 1 080 and 1 440 resolution head-mounted VR display on human visual acuity and visibility. The experimental results show that the low resolution in VR helmet reduces the visual acuity, but has not much impact on visibility. In virtual dark scenes, the improved volume fog algorithm can bridge the gap between human visibility and smoke extinction coefficients, so as to test the visual perception effect of human eyes on fire smoke. The relationship between human eye visibility and fire extinction coefficient is constructed, and it provides a means to reconstruct the smoke in a VR environment based on the simulation result from FDS, which can improve the effect of escape drill in virtual fire field.

Key words: virtual reality｜, volumetric fog technology;fire visibility, virtual smoke reconstruction, FDS