PIV技术的粒子图像处理方法

段俐; 康琦; 申功

PIV技术的粒子图像处理方法

段俐¹,
康琦²,
申功¹

1.
北京航空航天大学飞行器设计与应用力学系
2. 中国科学院力学研究所国家微重力实验室

基金项目: 国家自然科学基金资助项目(1939100-1-3)

详细信息

作者简介:
段俐(1966-),女,四川广安人,博士生,100083,北京.

中图分类号: V 211.7
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- 文章访问数: 4311
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- PDF下载量: 3854
- 被引次数: 0
出版历程
- 收稿日期: 1998-08-04
- 网络出版日期: 2000-01-31

Image Processing Method of PIV Technique

1.
Beijing University of Aeronautics and Astronautics,Dept. of Flight Vehicle Design and Applied Mechanics
2. Chinese Academy of Sciences,Institute of Mechanics

摘要

摘要: 以图像相关理论为基础,研究粒子图像测速技术(PIV)的图像处理方法,编制出高精度的处理软件,重建计算模拟的粒子图像位移场,给出了自相关法与互相关法的积相关与减相关的计算结果,及互相关法的误差分析,分析了自相关与互相关区别.得出了互相关法是提高粒子图像测速技术精度的有效方法的结论,因此跨帧技术是PIV技术的发展方向.
- 流动测量 /
- 数字图像处理 /
- 自相关 /
- 互相关 /
- PIV技术
Abstract: The image processing method of PIV was studied on the base of the image correlation theory in this paper. The simulated particle image displacement field was reconstructed. The reconstruction result of auto correlation and cross correlation , and the error of cross correlation were given. The difference of this two correlation method was analyzed. The cross correlation is a good method that can increase the PIV's accuracy, so the frame straddling technique is favorite to be developed for PIV measurement.
- flow measurement /
- digital image processing /
- autocorrelations /
- cross-correlation /
- PIV

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参考文献(1)

[1] Westerweel J, Dabiri D, Gharib M. The effect of a discrete window offset on the accuracy of cross-correlation analysis of digital PIV recordings[J]. Experiments in Fluids, 1997,23:20~28. [2]Keane R　D, Adrian R　J. Theory of cross-correlation analysis of PIV image[J]. J Appl Sci Res,1992,49:191~215． [3]Michael L　Jakobsen, William J　Hossack, Clive A　Greated． Particle image velocimetry analysis using an optically addressed spatial light modulator:effects of nonlinear transfer function[J].Applied Optics,1995,34(11):1757~1768. [4]Grant X　Wang． Directionally-unambiguous , digital particle image velocimetry studies using a image intensifier camera[J]. Experiments in Fluids, 1995, 18:358~362． [5]田村秀行．计算机图像处理技术[M]．北京:北京师范大学出版社,1988. [6]徐秉铮,欧阳景正．信号分析与相关技术[M]．北京:科学出版社,1981.

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