基于FPGA的高精度多路数据采集与存储

High-precision multi-channel data acquisition and storage based on FPGA

在高速多路数据采集中,以现场可编程逻辑门阵列(FPGA)控制芯片为核心,根据每个通道的不同采样速率要求,排布采样切换顺序,保持AD的采样速率恒定,精确控制多路切换的地址变化,使AD按照要求进行精准采样并实时操作Flash对大量数据进行缓冲高速存储等操作。该方法已成功应用于某汽车黑匣子的数据采集电路中。

In high-speed multi-channel data acquisition, use field-programmable logic gate array （FPGA） as the control chip, arrange the switch order of sampling according to the different sampling rate request. Hold the AD sample rate constantly, and control multi-channel switch precisely to make AD sample accurately as required. Do real-time operation to store the large number of flash data. The method has been successfully applied to a ear black box data acquisition circuit.