天幕靶探测高速弹丸信息识别检测研究

Research on Identification and Detection of High Velocity Projectile Information BaseD on Sky-screen

针对飞行弹丸穿越天幕靶光幕的目标信息识别与提取问题,提出小波分析法检测与识别弹丸信息。将天幕靶探测电路输出的目标信号归结为一个两类判别的模型,利用小波Fisher判别法,构造信号的特征向量,研究弹丸作用于光幕的弹丸信号识别;根据小波模极大值理论,寻找弹丸信号的奇异点,按照信号变化的奇异点,推算出弹丸作用光幕瞬间的起始时刻。根据天幕靶测速原理,该检测与提取方法可以提高系统测速精度。

The method of wavelet analysis was applied to detect and identify the information of flying projectiles passing through the sky-screen.The output signal of the detection circuit of the sky-screen was divided into two kinds of distinguish model,and the signal characteristic vector was constructed based on the Fisher distinguish method.According to the theory of wavelet transform modulus maxima,singular points of projectile signals were tracted and then used to calculate the starting time of the projectile affecting on the sky screen.It is indicated that this method can improve the velocity measurement accuracy of flying projectiles base on sky-screen measuring principles.