基于PXI的通用数据采集系统  

General Data Acquisition System Based on PXI

作　　者：黄明[1] 刘亚斌[1] 韩亚钦[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100083

出　　处：《计算机测量与控制》2006年第12期1745-1747,共3页Computer Measurement &Control

摘　　要：简要介绍了针对多种数据类型的采集系统的硬件结构和基于LABVIEW平台的软件实现,该系统采用美国NI公司的各类数据采集板卡,能够对模拟信号、数字信号以及图像信号进行实时采集和显示,并且能够进行存储和回放;采集过程中,通过运用PXI总线的背板时钟和同步触发功能,较好的解决了各种板卡之间的同步问题;实验表明:系统的实时性得到了很好的满足,信号之间的时序关系能够清楚地反映到虚拟示波器和图像窗口中,满足用户对于通用数据采集系统的要求。A new method is introduced to design a hardware system aimed at various types of signals acquisition and software architecture based on the LabVIEW. Using the National Instrument data acquisition （DAQ） devices, it can not only acquire , display the analog signals , the digital signals, and the image signals in synchronized method, but also store and replay the signals after acquisition. The syn chronization of signal acquisition among multiple boards has been achieved by the use of system clock on the backplane and RTSI trigger bus integrated in PXI bus. Experiments have showed that the real--time capability of the system has been gained and the timing between signals can be clearly displayed in the window of the virtual oscillograph and image graph. It can meet the requirements of general data acquisition system.

关 键 词：虚拟仪器 数据采集 LABVIEW 同步 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]