USB原理及其在数据采集系统中的应用

通用串行总线(USB)作为计算机领域新型成熟的外围设备接口，具有传输速度快、易扩展、即插即用、支持热插拔、数据传输可靠等优点。在各行业中，常常利用计算机对各种数据进行采集，USB的出现很容易实现低成本、高可靠性、多点的数据采集。介绍了USB的基本特点、USB的结构、USB的基本硬件元素和USB通用软件以及在数据采集系统中的硬件设计和软件构成。

Principle and application in data acquisition system

As the new and mature ancillary equipment in computer field,USB has some advantages such as fast transmission speed,easy expansion,plug-and-play and hot plug and dependability of data transfer and so on.Computer is often used to collect all kinds of data in many trade.It is easy to realize data collection which is low cost,high dependability and multipoint after USB apeared.The basal characteristic,structure,hardware and currency software of USB were introduced.The hardware design and foftware configuration in data acquisition system were also introduced.