A Novel System of Laser Screens for Velocity Measurement Based on MCU

A novel system of laser screens for velocity measurement based on MCU was introduced. The microprocessor AT89C51 which has low cost and convenience in adjustment was used to replace the data processing system composed by data acquisition card and computer. The structure and operating principle of the system and design of the hardware and software were detailed as well. Several series of speed data of 7. 62mm projectile measured by the laser screen system based on AT89C51 were given. As a result, the velocity measurement method based on the system of laser screen has advantages of convenience in adjustment, large effective laser screen area, low cost and high sensitivity.