提出一种测量振动过程中颗粒对流速度的新方法——示踪子寻迹测速法。该方法可对粒子位置坐标进行精确识别,同时,利用其颜色属性、三角形最小形变度对未能直接识别的粒子加以辅助识别,实现了对运动粒子不同时刻空间参量的跟踪描述。运用图像处理软件ImageJ获取粒子位置坐标,具有处理速度快,便于修正的特点,与其他位置识别方法相比,ImageJ具有独特的优越性。

A new method is introduced for measuring convection velocity of granule in the process of vibration, which is named seeking trails of tracer particles. The coordinates of particles can be accurately identified, and unmatched particles can be unidentified by use of color attribute assisted by minimum deformation degree of triangular, which realizes the tracking and description for moving particles in different moments and spaces. In terms of obtaining particle location coordinates, ImageJ has the characteristics of fast processing and easily amending. Moreover, it has the unique superiority compared with other identification methods.