利用数字狭缝摄像技术估计弹丸速度和攻角

针对目前靶场中胶片式狭缝摄影技术的缺点和数字化改进的难点,提出了基于线阵摄像机的数字狭缝摄像技术来估计弹丸速度和攻角.该方法首先利用单台标定的摄像机配合双像器获取弹丸的立体影像,提取有限个控制点,计算弹丸速度、姿态等的初始估计值.然后利用弹丸的模拟成像与实际成像的轮廓匹配构建最优化模型,对初始估计值进行优化,最后获得弹丸的速度和攻角.通过试验验证了该方法估计弹丸速度和攻角的精确性.

Estimation of the projectile's speed and attack angle using the digital streak photographic technique

A novel method using digital streak photography technique based on line-scan camera is proposed in order to circle out the problem in the digital improvement of the traditional streak facility in test range.The projectile’s stereo images were firstly collected by using a calibrated line-scan camera and a mirror,and then some special points were picked to compute the initial guess of the projectile’s velocity and attitude.The initial guess was further refined by using an optimization model established on the matching measure of the simulated and the real images contours.The speed and the attack angle were ultimately obtained.The accuracy of the estimation was experimentally tested.