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

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...

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 base

Images