Measurement method for fragment velocity based on active screen array in static detonation test
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摘要: 为了准确、可靠地测量到静爆试验中任意水平方向上的破片飞行速度，提出了一种基于主动光幕阵列的静爆破片飞行速度测量方法。首先，以被测弹药静爆点为中心的平面上环形布放12组主动式六光幕阵列，当破片穿过其中任意一组光幕阵列的探测幕面时可测量到其飞行参数（如速度、入射角及立靶密集度等）；其次，根据所提出的光幕阵列布局配置，建立了其破片飞行参数测量模型，分析了破片速度分量误差在一定范围随各速度分量变化规律。通过理论分析及实弹实验可知：在规定测试条件下破片速度分量误差不超过2.7 m/s，可以满足任意水平方向上的破片速度测量需要。Abstract: In order to accurately and reliably measure the flying speed of the fragment in any horizontal direction in the static detonation test, a method for measuring the flying speed of the static detonation fragment based on active screen array was proposed. Firstly, twelve groups of active six-screen arrays were arranged around the static explosion point of measured ammunition. The flight parameters(such as velocity, incident angle and vertical target density) of these fragments can be obtained when they pass through the detection area in every six-screen arrays. Secondly, according to the configuration of the proposed screen array, its model was established to obtain the related flight parameters, and then the change rule of error with each velocity component was analyzed in a certain range. Through theoretical analysis and live ammunition experiment, results show that the component errors of fragment velocity is less than 2.7 m/s, and thus the proposed method can meet the measurement requirement of fragment velocity in any horizontal direction.
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