Study on Timing Data Gathering Across Screen Fire Measuring System

Due to the shortcoming of the old cross screen fire measuring system,which uses single trigger to gather data and cannot display the output in time,a new method that uses the technology of combining CPLD and SCM with computer was put forward in LBS-1 across screen fire measuring system.The aim is to realize real-time gathering,transmiting and processing of data.Based on the mathematics model of cross screen measuring system,which can measure the speed of the bullet and the two-coordinate of the target,a circuit to collect and transmit time data was designed when the bullet crosses light-screen area of the sky-screen,the erro is 0.5 μs.Based on the real working condition of the target,an anti-interference internal logic timing function circuit was designed,then simulation and analysis were conducted.The data were confirmed through live firing.