Projectile Velocity Measurement System Based on PVDF and Data Processing Method

Abstract

Time of flight (TOF) algorithm is mainly used to measure the velocity of a projectile. TOF algorithm measures the time required for the projectile to fly over a fixed distance. We use poiy vinylidene fluoride (PVDF) to measure TOF. Based on the analysis of the signal generated by the projectile penetrating PVDF film, a projectile penetrating unit recognition algorithm and a projectile velocity calculation method are presented. In projectile penetrating unit recognition algorithm, we filter all signals generate by PVDF, and identify the projectile penetrating unit. Then, the time when the projectile reaches two PVDF films is determined by the threshold method, and the TOF is obtained, so the flight speed of the projectile is obtained. It is proved that this method can distinguish the penetrating units of the projectile correctly and calculate the velocity of the projectile accurately.