基于DAQ PCI9820的单双缓冲混合模式采集系统设计

Design of sampling system using mixed mode of single-buffer and double-buffer based on DAQ PCI9820

介绍了一种基于PCI总线的数据采集卡PCI9820的高速高精度雷达回波信号采集系统,描述了板卡的硬件结构及相关逻辑功能,并结合板卡的相关驱动函数编写了单双缓冲混合模式采集程序,能较好满足实时性与高速性的不同要求。

Precise acqtisition and storage of radar echo signal provide good data base for digital signal processing, as well as being prerequisite to accomplish radar target recognition and iraaging well.In tiffs paper, a high- speed and high- accuracy acquisition system of radar echo siglml based on DAQWA9820 of ADLINK is introduced. Its HArdwaerstructure and functions of correlative logic blocks are also deseribecl. Using its hardwa.ne and driver funcitons, based on its single- buffer and double - buffer mode, a nixed - mode program is made, and it works well to satisfy different requirernents of real time and high speed, followed by the description of the data file format and data format on disk.