本文提出了由高速高精度A/D 轉換芯片、高性能FPGA、PCI 總線接口、DB25 并行
接口組成的高精度數據采集系統的設計方案及實現方法。其中FPGA 作為本系統的控制核心和傳輸橋梁，采用并行接口和PCI 總線接口的兩種數據傳輸模式，使系統方便的在兩種傳輸模式下進行切換。最后采用QuartusII 開發軟件對FPGA 進行開發設計并通過VB 程序編寫了應用于PC 端的上層控制軟件。
關鍵字: 數據采集；PCI；并行接口；FPGA
Abstract: The thesis suggested a scheme of designing the high accuracy data acquisition system which is composed of high speed and high resolution A/D converter, high performance FPGA, PCI bus interface and DB25 parallel interface. As the control center and transmission bridge, FPGA played a very important part in this system. There are two kinds of transmission mode. Through logic control of the FPGA, the system can transfer data by the parallel interface or PCI interface. At last, it designs the FPGA using QuartusII design software and utilizes the VB program to design the control software on PC.
Keywords: Data Acquisition; PCI; Parallel Interface; FPGA