Bi-prism-based single-lens three dimensional digital image correlation system with a long working distance: Methodology and application in extreme high temperature deformation test  

作　　者：WU LiFu YIN YuanJie ZHANG Qi FANG DaiNing ZHANG RuBing ZHU JianGuo XIE HuiMin 

机构地区：[1]AML, Department of Engineering Mechanics, Tsinghua University [2]Institute of Advanced Structure Technology, Beijing Institute of Technology [3]Department of Mechanics, School of Civil Engineering, Beijing Jiaotong University [4]Faculty of Civil Engineering and Mechanics, Jiangsu University

出　　处：《Science China(Technological Sciences)》2018年第1期37-50,共14页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11672153,11232008&11227801)

摘　　要：As a novel three dimensional digital image correlation （3D DIC） method, the bi-prism-based single lens （BSL） 3D DIC method has been proposed and developed in recent years. Making use ofa bi-prism, this method is able to perform a 3D DIC measurement using only a single camera. Thus, the integration level of a BSL 3D DIC system could be much higher than that of the double-camera 3D DIC system. In this paper, using a small-angle bi-prism and a camera with a longer focal length, a special BSL 3D DIC system with a long working distance is designed for measurements in extreme environments. The principle of the system is first studied, and practical methods are then proposed for the system set-up and the determination of system parameters. Then, feasibility of the measurement system is verified by out-of-plane rigid-body translation tests. Finally, the BSL 3D DIC system is proven to be capable of combining with a high-temperature testing instrument to perform deformation tests in a high-temperature environment of up to 1500℃.

关 键 词：three dimensional digital image correlation(3D DIC) single lens bi-prism high temperature deformation measurement 

分 类 号：TH0[机械工程]