基于CCD的三维动态变形非接触测量

Non contact measurement of 3D dynamic deformation based on CCD

利用快速傅里叶变换方法,对周期性三维动态变形物体表面进行非接触测量,通过对其三维面形数据进行采集与分析处理,精确得到物体表面动态变形量。用正弦光栅投影到处于快速形变的物体表面,使用高帧频CCD获取随时间变化的一系列变形条纹,再采用傅里叶变换轮廓术的方法进行动态相位数据处理,可获取一个周期内任意时刻的变形,并能再现物体变形的整个变化过程。该方法可用于车载包装箱体周期性动态变形测量等相关领域的研究。

This paper introduced the method that based on fast Fourier transform to measure three-dimensional periodic dynamic deformation of the surfaces by non-contact measurement. The exact size of surface deformation could be obtained by collecting and analyzing its three-dimensional surface shape data. The sine grating is projected on the object surface in rapid deformation and thus a series of deformed stripes varying with time can be acquired with a high flame frequency CCD. The whole variation process of the object surface deformation can be reconstructed after the stripes have been processed by Fourier transform profilemetry. So the cycle of arbitrary moment of deformation could be obtained. This method can be used for periodic dynamic distortion measurement of packaging box of the vehicle and other related research in the field.