北京航空航天大学学报 ›› 2004, Vol. 30 ›› Issue (05): 456-460.

• 论文 • 上一篇    下一篇

数字全息粒子图像测速技术研究

魏润杰1, 申功1, 丁汉泉2   

  1. 1. 北京航空航天大学 航空科学与工程学院, 北京 100083;
    2. 北京航空航天大学 理学院, 北京 100083
  • 收稿日期:2002-12-30 出版日期:2004-05-31 发布日期:2010-09-21
  • 作者简介:魏润杰(1974-),男,山东青岛人,博士生, manager@PIV.com.cn.

Research of digital holography PIV technique

Wei Runjie1, Shen Gongxin1, Ding Hanquan2   

  1. 1. School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. School of Science, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2002-12-30 Online:2004-05-31 Published:2010-09-21

摘要: 通过全息照相及再现的理论分析,进行了数字全息计算机数值模拟,利用快速傅里叶变换技术(FFT)对拍摄到的干涉条纹进行了图像复频域的信号分析,实现了数字全息的复频域滤波技术和全息图的小景深再现技术,应用于数字全息粒子图像测速DHPIV(Digital Holography Particle Image Velocimetry)技术.并对立方体对角复杂流动流场进行了试验测量,得到了空间中的三维速度向量场分布,进而得到了三维流线的空间分布,实现了具有时间序列全流场三维空间的三维速度场测量.

Abstract: The principal formula of digital holography was deduced and verified from the analysis of holography using Hugeness-Fressnel theory and computer simulation. The thin focus depth of reconstructed 3-D digital image using in holography particle image velocimetry was created by a digital image phase filter method. The velocity vector field with 3-components in 3-D space was computed by 3-D cross-correlation algorithm with thin depth image slices after using phase filter and non-linear image filter. The 3-D vector and streamline results in a cubic flow field were achieved by using DHPIV technique. The results demonstrated an important step was made for the practicality of holography PIV.

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