基于PCI的双通道高速数据采集累加系统

Dual-Channel High-Speed Data Acquisition and Accumulation System Based on PCI

介绍了一种基于PCI的双通道高速数据采集累加系统。它能够在高速采集的同时通过FPGA实现实时累加,并且通过双通道A／D交替采样提高采样率。同时介绍了双通道A／D同步的一种简单实现方法,给出了一种基于FPGA的高性价比累加方案,分析了累加操作中数据对齐、缓存、合并以及多时钟域传输的难点,最后给出了完整的系统调试方案。该系统可以用于强噪声背景中的周期性微弱信号的提取。

A dual-channel high-speed data acquisition and accumulation system based on PCI is introduced. Its characteristics are the integration of the high-speed data acquisition and the real-time accumulation via FPGA, and it uses a dual-channel A/D alternate sampling method to double the sample rate. Then, a simple method for dual-channel A/D synchronization is introduced, the design of an accumulation method of high quality-price ratio based on FPGA is provided, and the difficulties in data aligning, buffering, combining and transforming between different clock domains are described. Finally, an intact debugging scheme of the system is presented. The system can be used for the periodical weak signal detection in strong noise background.