中文摘要：

雨滴粒子直径和速度实时测量是雨滴谱参数计算的关键,为了实时、连续得到精确、可靠的统计雨滴样本数据,采用基于高速线阵CCD的光阵排列法对雨滴速度和直径进行非接触测量,通过FPGA构造雨滴图像乒乓操作缓存单元,存储两行连续一维动态雨滴图像,发挥FPGA的并行运算能力,利用FPGA快速实现雨滴动态图像连通域检测及连通域标记算法,进而实现雨滴粒子的直径和速度检测。实验证明,该方法能自动连续测量记录雨滴数量、粒径大小和收尾速度,为雨滴谱参数计算提供可靠样本数据。

英文摘要：

The real-time measuring of particle diameter and velocity of raindrop is the key for the statistical of raindrop spectrum parameters.In order to obtain real-time,continuous,reliable and accurate statistical raindrop sample data,the light array method based on high speed line array CCD is adopted for non-contact measurement of the speed and diameter of raindrop.Raindrop images cache unit is structured by FPGA,which stores two rows of continuous dynamic raindrop images.With using FPGA parallel computing ability,raindrop dynamic image connected domain detection and mark algorithm are achieved rapidly by FPGA,and then realizing the particle diameter and velocity detection.The experiments show that this method can automatically and continuously measure and record the number,size and terminal velocity of raindrop,and provide a reliable sample data for the raindrop spectrum parameters statistical.