动态摄影测量在物理模型实验全过程地形数据获取中的应用  

Application of Dynamic Terrain Data Through the Whole Process of Model Test Using Dynamic Photogrammetry

作　　者：魏勇[1] 许强[1] 王卓 李骅锦[1] 李松林[1] Wei Yong;Xu Qiang;Wang Zhuo;Li Huajin;Li Songlin(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《地球科学进展》2020年第10期1087-1098,共12页Advances in Earth Science

基　　金：国家自然科学基金重大项目“面向人地协调的黄土重大工程灾变防控研究”(编号:41790445);国家自然科学基金重点项目“溃散性滑坡成因机理、监测预警与定量风险评价”(编号:41630640)资助。

摘　　要：物理模型实验广泛应用于土木工程、采矿工程及地球科学等领域。目前主要采用三维激光扫描技术采集实验前和实验后的两期静态地形数据,若要获取实验过程的动态地形数据就需要探索新的技术手段。以某碎屑流物理模型实验为例,利用动态摄影测量技术对物理模型实验进行四维建模,在对数据结果进行处理后获得了实验过程的动态地形数据,并以此分析碎屑颗粒的运动与堆积特征。结果表明:利用动态摄影测量技术可以快速准确地获取实验过程的动态空间影像数据,对这些数据成果进行详细分析,有助于我们更好地寻找和理解地质体的运动堆积规律。该技术方法是一种全新的物理模型实验动态地形数据获取方法,它将促使后期的实验分析工作发生巨大变化,值得推广应用。Model test is widely accepted and used in the field of civil engineering,mining engineering and earth sciences,etc.At present,the static terrain data are measured before and after each experiment by terrestrial laser scanning,however it is necessary to explore new technology to obtain dynamic terrain data in the course of the experiment.By taking the specified experimental tests of debris avalanche as an example,the method of 4D reconstruction based on dynamic photogrammetry was described in detail.The dynamic terrain data of the model test were obtained after the data had been processed,and then the propagation and deposit features of debris avalanche were analyzed in detail.The results show that the dynamic terrain data of the model test can be obtained accurately with the method,and the interpretation of the propagation and deposit should be relatively easy by analyzing the data of model test in detail.This is not only the new technology applied in the document of the dynamic terrain of the model test,but also causes a great change for the experimental analysis,and it deserves to be applied widely.

关 键 词：动态摄影测量 空间影像数据 四维模型 动态地形 物理模型实验 

分 类 号：P23[天文地球—摄影测量与遥感]