Projectile speed and flight altitude-position determination unit for testing armour plating

摘要

The line of vision of the camera unit (7) runs vertical to the direction of flight of the projectile. A mirror arrangement (11) is arranged in the vision field of a CCD camera unit (7) with single picture storage, and an illumination source e.g. a flash unit (8). As the projectile interrupts two light beams (1.1,2.1) a counter (3) measures the projectile speed from the time interval and the distance (S1). On interrupting the second light beam, a second counter (6) is started so that the camera and light source are triggered when the projectile passes. The camera unit detects the projectile simultaneously from at least two different directions vertical to the flight path, by means of the mirror arrangement which has a mirror arranged near the flight path in the field of vision of the camera unit, the mirror plane of which is inclined at 45 deg. to the line of vision of the camera unit, which enables the flight path to be seen from above. This results in a split picture, where each half represents horizontal and vertical deviations from the fight path.