The single flake light projectile detecting technology is used for measuring the projectile velocity exactly in hypervelocity impact test that are usually carried out for space debris research.For detecting projectiles with diameter less than 1mm,we develope the photoelectric array projectile detecting technology based on the single flake light projectile detecting technology.The key problem of detecting projectile with diameter less than 1mm is to increase the intensity of detected signal.It could be resol...