基于FPGA的反射式光幕测速系统

Research on Reflective Light Screen Speed Measurement System Based on FPGA

提出了以FPGA为核心的反射式激光光幕测速系统研制方案,系统采用半导体激光器作为扇形光幕的发射光源,与高速硅光电探测器在同一侧放置,构成反射式测速光幕,然后通过FPGA对弹丸穿过前后光幕的时间间隔进行测量,并提供时标选择。对主要模块进行了仿真,结果表明:测速各模块设计完整,验证了该系统的可行性。该设计适用于大口径的弹丸测速工作,具有重要的工程实用价值。

A reflective laser curtain velocity measurement system based on FPGA was proposed.The system adopts the semiconductor laser as the emitting light source of the fan-shaped screen,and is placed on the same side with the high-speed silicon photodetector to constitute the reflection type velocity measuring screen.Then,the time interval of the projectile passing through the front and back screen was measured by FPGA,and the timing selection was provided.The simulation results of the main modules show that the design of each module is complete,which verifies the feasibility of the system.The design is suitable for large caliber projectile velocity measurement and has important engineering practical value.