Measurement of Bullet Velocity Parameter from High-speed Sequential Images

Abstract

The bullet velocity parameter is the base of the next analysis of many impact experiments. A complete and rapid measurement of velocity parameter before and after an impact of the projectile on the target is a problem to be solved. We proposed a method aiming at measuring the bullet velocity parameter from high-speed sequential images, completely and fast. We firstly set up the high-speed camera sensor network for grabbing and storing of high-speed sequential images. It contained two high-speed cameras, a synchronous control system, two master-slave computers to control other systems, and the supplement light system. Subsequently, a surveying control network was constructed to solve the parameters of videogrammetry. 3D reconstruction was applied to the solution of the bullet center 3D coordinates, and the bullet velocity parameter was finally solved by the approach of time difference. The experiment of measurement of the bullet velocity was done successfully. The bullet velocity parameter we measured was provided to the criminal investigation department.