Abstract: The research on the characteristics of artillery projectiles within the after-effect period is of great importance to the artillery engineering practice. At present, there is not a mature and practical method for the measurement of two important parameters, such as after-effect duration and operating range. A measuring method is proposed to measure the after-effect duration and operating range of artillery projectiles. In the method, a high speed digital camera technology and an image processing software are used to obtain the projectile position coordinates and time when the band leaves the muzzle and the projectile base leaves the shock wave. The difference between the two position coordinates is the operating range of projectile in the after-effect period, and the difference between the times when the band leaves the muzzle and the projectile base leaves the shock wave is the duration of after-effect period. The method was used successfully to measure the after-effect duration and operating range of projectile for a small caliber artillery in a range test.

Key words: ordnance science and technology, gun, projectile, after-effect period, operating range;measuring method