为了帮助铅球运动员快速提高成绩，设计了一种新的铅球运动参量测试系统。该系统由一组基于菲涅耳透镜的激光平行光幕和光敏二极管阵列组成，采用现场可编程门阵列进行信号处理。该方法可以方便地测试铅球的出手角度和速度，并将测试结果直观地显示在液晶显示屏上。结果表明，该系统设计新颖、结构简单、成本低廉，可作为运动员日常训练之用，具有广泛的应用前景。

In order to help shot athletes improve their score quickly，a new shot motion parameter measuring system was designed. The system consists of a set of laser parallel light curtain based on Fresnel lens and photodiode array, using field-programmable gate array (FPGA) for processing signals. The method can measure the shot angle and velocity conveniently and display the measurement results on the liquid crystal display(LCD) monitor intuitively. The results show that the system design is novel, structure-simple and low-cost，which can be used by athletes for daily training and has wide application prospects.