综述:阵列式高速摄像技术及其在动态光测力学中的应用

Design principles and photomechanical applications for high-speed array camera systems:a review

高速摄像技术与先进光测力学方法相结合是研究材料和结构断裂、冲击、爆破、渗透等动态力学行为的重要手段。阵列式高速摄像系统是一种具有成像通道成阵列均匀分布显著特点的高速摄像系统,已在科学研究和工程技术领域得到广泛应用。本文对阵列式高速摄像系统的设计及其动态光测力学方面的应用进行综述。首先,对阵列式高速摄像系统的发展历史和技术改进过程进行概述。其次,阐述阵列式高速摄像系统的研究现状,重点介绍双场镜、旋转镜面和物理分幅等三类典型阵列式高速摄像系统的设计原理,并对不同系统的主要技术指标进行总结。再次,对阵列式高速摄像系统光学视差的定性和定量分析方法进行总结,并对视差修正方法进行归纳。最后,结合光弹法、焦散线法、数字图像相关法、云纹法、相干梯度敏感法和数字梯度敏感法等主要光测实验技术,阐述阵列式高速摄像系统在动态光测力学领域中的应用。本文对阵列式高速摄像系统的设计和应用进行了总结和展望,对于研制动态光测力学设备、推动材料与结构动态力学行为以及阵列高通量测试的基础科学问题的创新性实验研究具有一定参考意义。

High-speed camera technology combined with advanced photomechanical methods plays an important role in studying fracture,shock,explosion and penetration in materials and structures.The high-speed array camera system is a kind of high-speed camera with the characteristic of uniform array distribution of imaging channels,which have been widely applied in many engineering fields.This review will summarize the design principles and photomechanical applications for high-speed array camera systems.First,a brief history of technological improvements on high-speed array camera systems is presented.Second,the current state of the art of high-speed array cameras is discussed,particularly the design principles and the key technical indicators of three typical array camera systems including double field mirror cameras,rotating mirror cameras and image converter cameras.Then,qualitative and quantitative analyses on the inherent optical parallax of array camera systems are summarized,and the parallax correction methods are reviewed herein.Last,digital optical measurement techniques including photo-elastic,caustics,digital image correlation,moiré,coherent gradient sensitivity method,in combination with high-speed array camera systems to capture transient phenomena are summarized.This review work will provide the design guidance for a dynamic optical measurement instrument,and it will promote the array high-throughput measurements and the innovative fundamental experimental researches for dynamic mechanical behaviors of materials and structures.