基于反向条纹投影的动态物体形变测量  

Dynamic deformation measurement based on inverse projected fringe technique

作　　者：李雯[1] 张启灿[1] 王庆丰[1] 侯志凌[1] 曹森鹏[1] 

机构地区：[1]四川大学光电技术系,成都610064

出　　处：《激光杂志》2009年第2期47-48,共2页Laser Journal

摘　　要：本文提出一种应用反向条纹投影技术对动态三维物体进行形变测量的方法。该方法应用反向条纹投影原理,首先根据绝对相位测量法计算出反向条纹,然后投影反向条纹图到动态形变物体表面,并用高帧频摄像机跟踪记录物体表面反向条纹的动态变化过程,成像面上的反向条纹只在待测物体有形变的区域发生弯曲变形,没有形变的部分则仍然保持直条纹,显明地记录了形变物体的变形,处理时经过傅里叶变换、频谱滤波、傅里叶逆变换等就可以得到形变物体的面形变化。可以只处理物体产生形变的部分,滤波过程也就变得比较简单。对振动过程中的薄膜形变进行了测量和分析,证实了该方法的有效性。In this paper, a method for three dimensional （3D） shape measurement and dynamic deformation analyses based on inverse projected fringe technique is presented. The inverse fringe pattern can be generated according to the absolute phase measurement on the measured object. The inverse fringe pattem is projected onto the surface of a dynamic object and a high - speed CCD camera was used to record the deformed fringe patterns on the object. The deformation of the dynamic object v＇as calculated and evaluated. On the recording plan, only the fringe,at the deformed area will be curvod while fringes in the other areas remains straight and the deformation of the tested object become much obvious. The shape and movement of the dynamic object can be qualitatively analyzed and recognized by Fourier transform, filtering, inverse Fourier transform. The filtering will become much easier if only the part of defomation is considered, and its validity has been verified by the experiment on the vibrating nrembrane.

关 键 词：反向条纹投影技术 形变测量 三维面形测量 薄膜振动 

分 类 号：TN248.1[电子电信—物理电子学]