改进时空克里金插值的气体扩散体可视化  

Volume visualization of gas spread based on improved spatio-temporal kriging interpolation

作　　者：叶洪超 刘纪平[2] 徐胜华[2] YE Hongchao;LIU Jiping;XU Shenghua(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,成都611756 [2]中国测绘科学研究院,北京100036

出　　处：《测绘科学》2022年第11期96-103,112,共9页Science of Surveying and Mapping

基　　金：地下空间灾情信息感知与应急通讯装备项目(2020YFC1511700)

摘　　要：针对气体监测数据无法有效表达气体整体扩散情况的问题,结合气体监测数据的分布特点提出了一种基于时空克里金插值的气体扩散体可视化方法。首先通过时空体素模型对多时态气体数据进行高效组织;然后利用改进时空克里金插值法对气体扩散过程中浓度进行数据加密,通过采样计算转化为时空体素模型中对应的体素值;最后基于光线投射法实现扩散过程的体可视化模拟。通过构建仿真场地对本文方法进行实验与分析,结果证明本文方法在可接受的计算速度内实现了气体扩散的插值,且气体动态体可视化的效果较好。Aiming at the problem that the monitoring data cannot effectively describe the overall gas diffusion,this paper combines the distribution characteristics of gas monitoring data and proposes a method for gas diffusion volume visualization based on spatio-temporal kriging interpolation.First,use the spatio-temporal voxel model to efficiently organize multi-temporal gas data,then use the improved spatio-temporal kriging interpolation method to encrypt the data of the concentration in gas diffusion process,through sampling calculation convert it to the corresponding voxel value in the spatio-temporal voxel model,finally use the ray casting method realize the volume visualization simulation of the diffusion process.By constructing a simulation site to conduct experiments and analysis of the method in this paper,the result shows that the method in this paper achieves the simulation of gas diffusion within an acceptable calculation speed,and the gas dynamic volume visualization effect is better.

关 键 词：气体扩散 克里金插值 动态模拟 体可视化 

分 类 号：P237[天文地球—摄影测量与遥感]