字节多路通道数据实时采集系统的设计  

A design of real-time byte multiplex channel data acquisition system

作　　者：金星虎[1] 刘亚斌[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：《微计算机信息》2008年第13期79-81,共3页Control & Automation

基　　金：国家自然科学基金支持(50375008;60575052)

摘　　要：本系统基于PXI总线,实现了对字节多路通道(byte multiplex channel,以下简称BMCH)数据的实时采集,实现了双缓存交替工作的接收方式。并且根据实时性要求,采用了VxWorks实时操作系统。本文主要介绍了BMCH数据的传输格式,重点讲述了本系统的主要结构、工作原理,简要介绍了基于VxWorks操作系统的驱动开发。经过实际验证,本系统能够准确地长时间地采集连续的BMCH数据,简化了上位机的软件设计,并且能够实现自检。This system realizes real-time capture of byte multiplex channel （BMCH for short）data, which uses PXI bus, and realize the work mode of double rams working alternately. Because of the requirement of real-time, VxWorks operating system is adopted. This article mainly introduces the transmission specification of BMCH data, lies emphasis on the main structure and work theory of this system, gives a brief introduce about developing device driver under VxWorks operating system. It is proved that this system can gather BMCH data accurately which lasts for along time and continuously, it also can simplify the software design of the upper computer and realize self-check for the detecting system itself.

关 键 词：PXI总线 实时 BMCH VXWORKS 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]