In order to realize high-precision measurement of bomb velocity

propose a design of dual-light screen bomb velocity measuring system which based on field programmable gate array（ FPGA）. Using EZ-ARRAY series light screen measuring sensors to produce precise synchronization beam sensor array which instead of multiple group of sensor pairs

solve problem of alignment difficulty of light screen transmitter and receiver. While using FPGA to realize functions of A / D converter control

data storage

and USB communications. Aiming at difference between nominal value and actual value of sensor output

an I / V signal conversion circuit which can adjust zero value is designed. Experimental results show that property of the system is stable and reliable

test result is accurate and it is validated that bomb bottom trigger mode is more accurate than the bomb tip trigger mode.