Onboard Velocimetry Study

Researches in high-supersonic projectiles that intend to intercept incoming missiles or armed helicopters have been of interest in recent years. The denotation time of the projectile is a key factor for this kind of the ammunition system. Generally the automation rapid fire artillery linking with fire control system can shoot massive projectiles and bullets in short time. The artillery uses electronic time fuze to control explosion time and the projectiles form a barrage in front of the attacking target to hit-to-kill the incoming missile. But this method needs set the target information quickly in muzzle. In order to avoid inductive setting in muzzle, the target information can set in the fuze before launching while the muzzle speed can be measured by the fuze, which uses the inductive coil in the fuze and the launch coil in the gun muzzle. Then the detonation time can be determined by the single chip in the fuze, according to the target distance which was supplied by the fire control radar. When it's over at the regular time, the projectile would be detonated by the fuze, it will aerial burst, reaching a maximum damage effect. This paper researches the idea of the velocity measurement in the gun muzzle, and points out the composition of the measuring velocity system. The configuration of the energizing coil and the inductor were designed, and the measurement velocity circuit was emphasized designed, which applied CF8051 single chip. And then, the every circuital part function was verified by the static debugging. The whole velocity measurement system is tested on the 12.7mm antiaircraft gun. At last, the error was analyzed on the velocity measurement result. Detailedly analyzing on error source and composition, we brought forward the improvement scheme.