通用串行总线作为一种崭新的微机总线接口规范，其特点使其非常适合高速数据采集系统。
As a new computer bus interface criterion, USB ap-plies to the high-speed data collecting system.
OPC规范和IEC 61499标准在现场总线控制系统中均属于用户层协议，二者都基于组件技术。
OPC specifications and IEC 61499 standard both are protocols of User Layer of FieldBus Control System(FCS), and both are based on software component technology.
其次依据PROFIBUS总线规范原理，设计了基于PROFIBUS总线的计算机联锁系统的硬件结构；
Secondly, according the standard of PROFIBUS fieldbus, the paper designed the hardware structure and the interface of the PROFIBUS of the computer interlock control system, which based on PROFIBUS.
USB(通用串行总线)具有传输速度快、可靠性高、使用灵活等优点，作为一种通信接口规范，他被广泛地应用在PC外设和便携式系统中。
USB (Universal Serial Bus) possesses good characteristics such as fast transmission, high reliability and flexibility. It has been widely used in the PC peripheral devices and potable system.
USB(通用串行总线)具有传输速度快、可靠性高、使用灵活等优点，作为一种通信接口规范，他被广泛地应用在PC外设和便携式系统中。
USB (Universal Serial Bus) possesses good characteristics such as fast transmission, high reliability and flexibility. It has been widely used in the PC peripheral devices and potable system.
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