中文摘要：

如何方便且准确地测量滚筒中颗粒的运动速率分布是研究的难点。文中将给出一种基于数字图像处理算法的实验方法来解决此难题。通过找到最合适的极短曝光时间,可捕获在此曝光时间内颗粒运动轨迹的图像,然后利用数字图像处理算法计算出感兴趣区域的颗粒运动路程,即可计算出颗粒的运动速率分布。通过精确的实验数据分析可看出,本实验方法与理论仅有〈8%的误差,有力证实了通过图像法测量颗粒速率分布可展开有效的研究工作。

英文摘要：

This paper proposes an experimental method based on digital image processing algorithm for the accurate and convenient measurement of the velocity distribution of particles of the rotating cylinder in the roller. The most suitable short exposure time is determined first for the particle trajectory images to be captured within this exposure time. The movement distance of the region of interest is then calculated by the algorithm of the digital image processing to get the distribution of particle velocity. The accurate analysis of the experiment data show that the method and theory of this experiment has a mere error of less than 8%, indicating that measuring the particle distribution by image processing can expand the research work effectively.