Research On Spatio-temporal Data Visualization Of Light Gas Diffusion Model

Toxic and harmful light gas leakage has the characteristics of concealment,speed and harmfulness.Once the leakage occurs,it will pose a serious threat to people and the social ecological environment.In order to reduce the damage and loss,the study on the diffusion mechanism of the light gas and the 3D visualization process can effectively deal with the sudden leakage accident and provide a basis for the prediction and evaluation.At present,the diffusion simulation of light gases mostly adopts the two-dimensional simulation analysis of Gaussian diffusion model,but there is not much breakthrough in the establishment of the three-dimensional diffusion expression system on the Web.In view of this problem,the following three aspects of work have been done:1)The superposition model of Gaussian smoke clusters of light gas with varying wind direction was established and compared with the field experiment of Burro 9,which showed that the relative error of the model was about 5% in the vertical direction and 11.5% in the horizontal direction.2)Irregular trapezoidal grid was used to set the sensor position to obtain the monitoring data,and the improved genetic algorithm was used to verify the inverse calculation positioning of the light gas leakage source,which indicated that the algorithm has the characteristics of accurate monitoring positioning and high stability.3)Based on the Amap platform,the Marching Cubes algorithm was used to establish the light gas boundary concentration isosurface,and the prototype system of light gas leakage source monitoring,positioning and prediction based on the sequence snapshot model was established.The light gas diffusion emergency system can quickly and accurately monitor and locate the light gas leakage source,can more vividly and accurately express the threedimensional dynamics of the light gas,and can query the light gas leakage space diffusion range of the corresponding time.Figure 31;Table 11;Reference 78...