基于PCI总线的数据采集接口

在论述微机数据采集系统的概念和应用前景的基础上,指出PCI数据采集系统是对传统仪器的改进,可以提供更加方便的数据采集和处理方式。讨论了一般数据采集系统的组成,描述了其中的多路模拟开关(MUX)、可编程放大器(PGA)、采样保持单元、AD转换器、数据缓冲与接口电路等。分析了PCI总线的特点和编址方法,最后以基于PCI微机的多通道测温仪的硬件设计为例,按照自顶向下的设计原则,设计了与PCI微机接口的数据采集系统,为开发基于PCI总线的数据采集系统提供了一种思路和方法。

Data Acquisition Interface Based on PCI Bus

Based on the discoursing upon conception and applying foreground of computer data acquisition system, points out that PCIbus data acquisition system can improve traditional instruments and can provide more convenient way for data acquisition and han-dling. Discusses the common components of computer data acquisition system, describes multiplexer, PGA, sampling/holding unit, ADconverter, data buffer and interface circuits and so on. Analyzes characteristic and addressing method of PCI bus. Finally, with mul-ti- channel temperature meter based on PCI computer as an example, according to top- to- down design principle, data acquisition sys-tem interface with PCI computer is designed, It provides a kind of method and thinking way for developing data acquisition systembased on PCI bus.