| 线阵CCD图像减影技术实现抛射物体轨迹实时检测 |
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| 引用本文： | 秦志军,方云婕,丁海曙,单信海,丁辉,金季春.线阵CCD图像减影技术实现抛射物体轨迹实时检测[J].清华大学学报(自然科学版),2002,42(3):312-315. |
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| 作者姓名： | 秦志军 方云婕 丁海曙 单信海 丁辉 金季春 |
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| 作者单位： | 1. 清华大学,电机工程与应用电子技术系,北京,100084
2. 北京体育大学,北京,100084 |
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| 摘 要： | 为对抛射物体的运动进行分析 ,克服使用高速录像并逐帧分析像片图像的方法需要较长的后期分析时间 ,不便于对结果进行自动快速分析的缺点 ,论文基于抛射物体的运动学规律 ,通过在抛射曲线上的两个固定点的高度和跨越时间的检测 ,获得了抛射物的初始角度和初始速度。对高度和时间的检测 ,采用了线阵电荷耦合器件 (CCD)为图像传感器进行摄像并采用图像减影的方法识别抛射物体。在对系统进行静态标定的基础上 ,在抛射架上进行了抛射实验检测。用该文提供的方法和用录像检测方法对不同条件下的初始发射角和初速度进行检测 ,二者数据符合得很好
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| 关 键 词： | 抛射运动 线阵CCD 初始角度 初始速度 图像减影技术 |
| 文章编号： | 1000-0054(2002)03-0312-04 |
| 修稿时间： | 2000年9月6日 |
Linear CCD and image-subtraction analysis to detect projectile motion in real time |
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| Qin Zhijun ,Fang Yunjie ,Ding Haishu ,Shan Xinhai ,Ding Hui ,Jin Jichun.Linear CCD and image-subtraction analysis to detect projectile motion in real time[J].Journal of Tsinghua University(Science and Technology),2002,42(3):312-315. |
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| Authors: | Qin Zhijun Fang Yunjie Ding Haishu Shan Xinhai Ding Hui Jin Jichun |
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| Institution: | Qin Zhijun 1,Fang Yunjie 1,Ding Haishu 1,Shan Xinhai 2,Ding Hui 1,Jin Jichun 2 |
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| Abstract: | Projectile motion is predicted by measuring the initial speed and angle. High speed video has been used with frame by frame image analysis, but the work is tedious. Kinematic theory is used to calculate the initial speed and angle of the projectile motion from the heights of two points on the trajectory and the time between them. Two sets of linear charge coupled device (CCD) cameras were used with the image subtraction technique to determine the heights and time above mentioned. Experiments show that the results given by this method agree with data given by high speed video image analysis. This method can be used widely in the field of projectile motion analysis. |
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| Keywords: | projectile motion linear CCD initial speed initial angle image subtraction technique |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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