炸点目标在高帧频电视测量中的指标分析

对高帧频电视测量的炸点目标飞行指标进行了分析,推导出测角误差、作用距离、飞行时间与飞行高度等飞行指标的计算公式,在此基础上对不同速度的相机和不同速度的运动目标的测角误差进行了对比研究。结果表明,采用高帧频电视测量对减小测角误差作用明显;同时,根据作用距离与相机拍摄速度的制约关系,进一步得出作用距离与拍摄速度的关系式。当相机工作在200fps,炸点飞行速度小于50m/s,爆炸当量200g TNT,利用对比分析结果和推导出的关系式,计算出测角误差小于50″,最大作用距离3km。经靶场实测,计算结果与实际飞行指标基本吻合。

Index analysis of explosive targets based on high-frame frequency TV measurement

The flight index of an explosive target is analyzed based on high-frame frequency TV measurement. The expressions for flight indices such as angle-measuring error, operating range, flight-time and flight height are derived in the paper. Comparison and research for angle-measuring errors obtained with different speed camera for different speed moving targets are performed. The results show that the method with high-frame frequency TV measurement benefits for reducing angle- measuring error. The relationship expression between operating distance and shoot speed is established based on the dependency between the operating distance and shoot speed of the camera. When the camera work at 200fps, explosive target speed is less than 50m/s and explosive equivalent is 200g TNT, the calculated angle-measuring error is less than 50" and the maximum operating range is 3km. Comparing with practical range measurement, the calculation results are basically consistent with practical flight specifications.