摘要
在对快速甚至高速运动物体进行研究时,需要对运动物体各个时刻的三维面形和形变量进行数字化描述。提出了一种利用频闪光作为结构照明光源,基于傅里叶变换轮廓术对旋转叶片每个时刻的三维面形和变形量进行动态测量的光学方法。使用自行设计的同步控制单元对风扇叶片旋转位置进行检测,用该检测信号同步驱动频闪结构光源的发光和图像采集系统“冻结”记录下旋转叶片表面变形条纹的瞬时图像,再运用傅里叶变换轮廓术计算出每一瞬间时刻旋转叶片的三维面形,分析这些三维面形数字化结果可以进一步得到旋转叶片的变形量。通过对家用电风扇的实验,验证了该方法的合理性和可行性。该方法可望在高速运动物体的面形和变形研究上有广泛运用。
Three-dimensional digitized description of high-speed motion objects is very useful in study its motion and deformation. An optical method of rotating fan blade shape and deformation measurement is proposed, which was based on Fourier transform profilometry (FTP) and Stroboscopic effect, and than is verified by experiment on a domestic electric fan. The results of authors' experiment proposed show that FTP can reconstruct the rotating fan blade shape efficiently and reveal the deformation clearly at different times by using Stroboscopic light structured illumination. This method is suitable for wide use in studying rapid periodic motion.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2005年第2期207-211,共5页
Acta Optica Sinica
基金
国家自然科学基金
中国工程物理研究院联合基金(10376018)资助课题。
