Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Calculation method for simulating diffusion concentration of toxic and harmful gas in three-dimensional virtual training environment

A harmful gas and three-dimensional virtual technology, which is applied in the field of accurate calculation of the concentration value of the simulated toxic and harmful gas diffusion, can solve the problems of real-time performance, dynamic changes, insufficient numerical fidelity, and large calculation amount of virtual reality training. Gap, Guaranteed Expansibility, Great Flexibility Effect

Pending Publication Date: 2022-08-02
中国人民解放军陆军防化学院
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CFD numerical simulation software can model various complex environmental factors, but it needs to solve complex equations, and the amount of calculation is relatively large. It is mainly based on static calculations and is used for scientific research on gas diffusion in real environments.
It cannot meet the real-time and dynamic requirements of virtual reality training
[0005] In some existing virtual reality training, the change of the concentration value of harmful gases is usually given a value based on time and location, and the Gaussian method is used to calculate, initially considering the influence of meteorology and simple ground surface, the numerical value of the toxic and harmful gas diffusion scene is realistic The degree of diffusion is not enough, the diffusion situation in the scene is fictitiously obtained by a random algorithm, or the concentration value of the diffusion situation cannot reflect the influence of factors such as building occlusion and wind speed on it as in reality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calculation method for simulating diffusion concentration of toxic and harmful gas in three-dimensional virtual training environment
  • Calculation method for simulating diffusion concentration of toxic and harmful gas in three-dimensional virtual training environment
  • Calculation method for simulating diffusion concentration of toxic and harmful gas in three-dimensional virtual training environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0090] Example: In this example, a typical chemical hazard environment is set as a scenario for the disposal of a highway tank truck leakage accident, which is mainly used to simulate the following training scenarios:

[0091] 1. Introduction to the training background: In the environment of the expressway scene, chemical toxic gas is generated after the leakage of the tank truck transporting hazardous chemicals. The rescuers conduct reconnaissance at the scene, operate the toxic gas detector to measure the concentration, and delineate the hazardous range of each hazardous concentration and Finally control the source of danger (plugging).

[0092] 2. Virtual environment construction: carry out chemical rescue and virtual reality (VR) simulation training for the disposal of chemical leakage accidents of expressway tank trucks. Using unity3d to build a virtual environment, including: tanker models, highways, construction areas, and terrains such as rivers, rocks, and vegetation....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a calculation method for simulating toxic and harmful gas diffusion concentration in a three-dimensional virtual training environment. The method comprises the following steps: S1, determining toxic gas diffusion effective influence factors; s2, constructing a physical model corresponding to a training environment, and exporting effective influence factors of gas diffusion; s3, dividing density grids according to the gas poison dose and the size of the shelter, and distinguishing the grid density; s4, constructing a CFD model, and calculating and simulating the harmful gas diffusion concentration; s5, establishing a concentration value time sequence situation result offline database for a period of time, and storing gas concentration situation results; and S6, during training, quickly displaying in the virtual environment. The method can consider the influence of terrain, buildings, weather and the like on gas concentration diffusion, can measure the gas diffusion concentration value at any point in the space in real time, and the diffusion concentration value is vivid and practical, so that the simulation effect of the harmful gas diffusion concentration value in the virtual reality chemical hazard simulation training environment is more real and credible, and the training effect is improved.

Description

technical field [0001] The invention relates to a calculation method for simulating the diffusion concentration of toxic and harmful gases in a three-dimensional virtual training environment, in particular to an accurate calculation method for simulating the diffusion concentration of toxic and harmful gases in a three-dimensional virtual reality simulation training environment for chemical hazards. Background technique [0002] Virtual reality (VR, Virtual Reality) technology is widely used in a variety of dangerous trainings to generate a large number of three-dimensional virtual environment scenes because of its immersive realistic scenes and natural interaction methods. Relevant departments have developed some virtual reality-based simulation training systems for this purpose. The training content mainly includes the command and coordination of rescue forces under chemical hazards, the use of rescue equipment, etc., but these trainings are generally carried out in the sim...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F30/23G06F30/28G06T17/20G16C20/20G16C20/30G06F111/18G06F113/08G06F119/08
CPCG06F30/23G06F30/28G06T17/205G16C20/20G16C20/30G06F2113/08G06F2111/18G06F2119/08Y02A90/10
Inventor 张宏远李晨王颖辉胡南顾进宋斌付向前李慧卓
Owner 中国人民解放军陆军防化学院
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products