测线膛炮弹丸膛内转速并求其轴向速度

MEASUREMENT OF ROTATING SPEED AND AXIAL VELOCITY OF PROJECTILES IN THE BORE OF RIFLED GUNS

介绍了用偏振法测线膛炮弹丸沿内弹道旋转运动的角速度曲线，并利用此结果和膛线方程求出弹丸沿内弹道轴向运动的速度曲线。该系统采用了微机，数据处理能力强，使这种测试方法能方便地应用于各种膛线的线膛炮。还着重介绍了该系统采用的一种抗干扰方法：将信号光和参考光分别转换成电信号，然后相除，在其他措施配合下，能有效地抑制因光源输出光强的变化或火炮发射时产生的烟雾对上述内弹道测量所造成的不利影响。最后还介绍了对30mm试验炮实测的部分结果。

This paper presents a polarization detection method for the acquisition of the plot for the rotating speed of projectiles along the barrel of rifled guns.Making use of this result together with the rifling equation,the plot of the interior ballistic velocity of the projectile can be derived.Utilizing a microcomputer,the system has a strong ability in data processins,which makes the method easily applicable to rifled guns with any type of rifling.The main feature of this system is the antiinterference procedure converting the reference light and the signal light to electric signals and measuring the ratio between them.In cooperation with other measures,this method can effectively depress the influences,including the intensity variation of the laser output,the muzzle flash and smoke.Measured results on a modelling gun are presented.