基于移动终端、混合模拟和增强现实的桥梁垮塌事故调查关键技术研究

项目名称： 基于移动终端、混合模拟和增强现实的桥梁垮塌事故调查关键技术研究

项目编号： No.51308321

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 许镇

作者单位： 清华大学

项目金额： 25万元

中文摘要： 近些年来，我国桥梁垮塌事故频发，科学、高效的桥梁垮塌事故调查具有重大意义。然而，目前的桥梁垮塌事故调查存在图片采集混乱、垮塌过程模拟不完整和模拟结果对照困难三个关键问题。本项目引入新兴的智能移动终端技术，提出基于智能移动终端的现场图片高效采集与全景图片实时重构算法，为桥梁垮塌现场图片快速采集和有序管理，以及大图幅的现场全景图片的快速合成探索新的方法；提出结合有限元与物理引擎的桥梁垮塌全过程异构混合计算方法，为结构垮塌问题全过程的完整模拟提供新思路；利用增强现实技术，将完整的模拟结果与真实的全景图片相结合，提出增强现实环境中的桥梁垮塌场景建模与过程再现方法，为桥梁垮塌事故调查创建新的对照和分析平台。最后，将上述研究应用于真实桥梁垮塌案例。本项目依照采集、模拟、对照的思路，为桥梁垮塌事故调查提供系统的方法、技术和软件支持，可显著提高桥梁垮塌事故调查的工作效率和信息化水平。

中文关键词： 桥梁垮塌事故调查；智能移动终端；物理引擎；虚拟现实；GPU

英文摘要： In recent years, bridge collapses have repeatedly occurred in China. Scientific and efficient accident investigations of bridge collapse are very significant. However, there are three key problems in the accident investigations of bridge collapse: disordered picture acquisition, incomplete collapse simulation and difficult comparison of simulation results. This project introduce the emerging smart mobile terminal to propose the algorithms on efficient acquisition of site pictures and real-time reconstruction of panoramas, which provide new solutions for the efficient acquisition and orderly management of site pictures and the creation of large panoramas. Besides, a heterogeneous hybrid simulation method based on finite element method (FEM) and physics engine is proposed, to provide new method for the complete simulation of structure collapse process. Based on augmented reality (AR) technology, the panoramas of site and the complete simulation result are well combined, and the method for the reconstruction of the scene and process of bridge collapse is proposed, which creates a new platform for the comparison and analysis of accident investigation. According to the above studies, the corresponding system will be developed and then be used in some real accident investigations of bridge collapses. Following the te

英文关键词： Accident investigation of bridge collapse；smart mobile terminals；physics engine；virtual reality；GPU