基于现场可编程门阵列的高速多通道并行测量系统设计

The Design of High-Speed Multi-Channel Parallel Measurement System Based on Field Programmable Gate Arrays

本文以线圈靶作为传感器,设计了一种可应用于"金属风暴"类多管阵列高射频火炮的新型并行测速测频装置.此系统通过多路并行设置线圈靶传感器感知信号;由多路信号调理电路对信号进行行运放滤波,再通过高速AD芯片和具有并行处理能力的FPGA芯片进行多路信号采集存储,最后由上位机软件进行速度值和射频值的计算显示,从而完成对弹丸初速及射频的测量.为了验证此新型测量系统的可行性,进行了双通道测量试验,试验表明该系统不仅具有稳定的精确测速功能,还具有精确的射频测量功能.

In this paper,a high-speed multi-channel parallel measurement system has been designed,which uses the coil targets as sensors and aims at measuring the projectile speed and firing frequency of array gun-barrel weapon with high firing frequency just like the ＂ Metal Storm＂.Firstly,the measurement system obtains the original speed signal by the parallel-set coil target sensors,and then a multichannel signal conditioning circuit amplifies the signal and filter out the clutter.After that,high performance ADC and the FPGA which has parallel processing capabilities are in charge of signal acquisition and storage parallel.At last,after the programmed PC software calculates and displays the speed and firing frequency value,the measurement process would be finished.In order to verify performance of this new measurement system,a dual-channel test experiment was conducted.Experimental results shows this system can not only stably achieve speed measurement,but also precisely give out the firing frequency value.