弹跳弹丸近地炸点高度光电测量方法研究

Optoelectronic measuring method for height of burst point of bouncing projectile

针对测量弹跳弹丸空中炸点高度的难题,提出一种光电测量方法。该方法利用弹丸落地弹跳后在空中做匀减速运动建立数学模型,通过声传感器、光幕靶、火焰探测器和双路测时仪测量弹丸在空中几个特征点的时间间隔,配合光幕靶的靶距等布靶结构参数,利用测量公式计算出空中炸点高度。文中对所提方法进行了测量不确定度分析,经理论分析,系统的测量不确定度小于20mm。结果证明该方法测量精度高、实时性好、可靠性高,仪器布放简便,所用设备均为靶场常用测试设备,易于工程化实现。文中介绍的方法适用于一类落地后再次弹跳后爆炸和民用礼花弹空中炸高的测量场合。

An optoelectronic measuring method was put forward to measure the height of the burst point in the air of bouncing projectile. The mathematical model of the method was estab- lished based on the projectile falling in the uniformly retarded motion after bouncing into the air. This measuring system was composed of a sonic transducer, a light screen, a flame detec- tor and a twin-channel chronograph, which could measure the time intervals of several charac- teristic points. The height of the burst point was calculated in accordance with the formula by means of cooperating with the measured time intervals and the structure parameters of the light screen. The uncertainty of the method was analyzed, which was less than 20mm theoretically. The result proves that the method has the advantages of high accuracy, good instantaneity, and high reliability. Besides, it is simple and convenient to integrate. The method is applied on the occasions of measuring the height of the burst point of the projectile bouncing back after falling to the ground and of the civil aerial display shells exploding in the air.