| PIV图像粒子像斑的定位偏差评估的讨论 |
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| 引用本文： | 董守平,双凯.PIV图像粒子像斑的定位偏差评估的讨论[J].实验流体力学,1997(1). |
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| 作者姓名： | 董守平 双凯 |
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| 作者单位： | 石油大学机电工程系!北京，102200，石油大学机电工程系!北京，102200 |
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| 摘 要： | 针对PIV技术的直接测量法中图像的可读性和可测性，讨论了从模拟图像到数字图像，最后到粒子像斑中心位置的确定过程中的误差规律；并提出一种称之为粒子像斑定位偏差综合评估的试验方法。该试验提供了一个能较为全面地定量考察PIV图像处理系统（包括硬／软件）在整个图像读入及粒子定位计测过程中对真值偏差的评估方法。最后，对石油大学流体测试室所开发的PIV图像实时采集处理系统进行了其定位偏差的评估测试。
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| 关 键 词： | 粒子成像测速 误差评估 定位偏差 |
A DISCUSSION ON THE ESTIMATION OF THE POSITIONAL ERROR IN THE PARTICLE SPOTS OF PIV IMAGE |
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| Dong Shouping,Shuang Kai.A DISCUSSION ON THE ESTIMATION OF THE POSITIONAL ERROR IN THE PARTICLE SPOTS OF PIV IMAGE[J].Experiments and Measur in Fluid Mechanics,1997(1). |
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| Authors: | Dong Shouping Shuang Kai |
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| Abstract: | The paper,which is aimed at the readable and measurable of PIV image with direct measurement,discusses the error law in the procedure among analog image acquisition and the central position of a particle spot and proposes an experiment method used to estimate positional error of particle spot. The experiment method provides a method that determines quantitatively deviation from real value in procedure of particle positional measurement. Finally,the experimental method is applied to the PIV real-time acquiring and processing system which is developed by authers to estimate the positional error of particle spots. |
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| Keywords: | Particle Image Velocity error estimation positional error |
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