I am in the process of developing an automatic marking system for range practice by the tanks. I wish to utilize sensors to check the hits or misses on a 6ftX6ft target (in the shape of paper/cloth on square metal frame). The sensor should be capable of detecting rounds hitting the target at speeds upto 1800meters/sec. The signal/pulse so obtained would be processed to get the output on the computer. Any sharp brains out there, pl post suggestions.