【摘要】 为了测量飞行目标落地速度,采用放置在落弹点区域附近的凝视等待式双目视觉摄像机,高速摄影交汇测量飞行目标的落地速度。根据不同时刻质心的空间三维坐标,用最小二乘法对目标航迹进行拟合,建立了目标三维空间轨迹的多项式函数,对多项式函数求导得到目标的飞行速度。实验与理论分析表明:采用的速度测量方法测量误差小于2%,测量方法正确、可靠,为飞行目标的速度测量提供了一条新的便捷可靠的途径。更多还原

【Abstract】 In order to measure the landing speed,the binocular intersection measuring system is set up near the landing area to detect the landing parameters of flying target by high-speed photograph.The polynomial function of target track 3D curve is fitted with the method of least square according to the 3D coordinate of centroid at the different moments,so the flying speed can be obtained by calculating the derivatives of the polynomial function.Based on the characteristic of rotary objects,three measuring methods are proposed to measure the pose according to the size of images in the camera planes.The measuring error sources are analyzed and the methods to reduce the measuring error are also put forward.Experiments and theoretical analysis prove the exactness and effectiveness of the proposed measuring methods of speed,and the measuring error of speed is less than 2%.A new and reliable approach to measure the dynamic parameter of flying target is provided.更多还原