基于VME总线数据采集从模块的研究与设计

摘要

Featured by its high performance. immediacy and reliability, VME bus is widely used in the field of aviation and spaceflight. Based on the research on and analysis of the operational principles and the data transmission procedure of VME bus,the design principles of both VME bus interface and data collecting circuit are elaborated. In particular , it adopts the approach of amplifying and second-order filtering respectively to collecting the millivolt level small signal, thus effectively preventing the outside interference in the signal and realizing the collection of data and the access of VME bus to slave module.%由于VME(Versabus Modular Eurocard)总线的高性能、实时性、高可靠性等特点,使其广泛应用于航空、航天领域.对VME总线的工作原理、从模块数据访问过程进行了研究和分析,重点阐述了VME总线接口和数据采集电路的设计原理.其中,对于毫伏级小信号的采集采用了先放大,再进行二阶滤波的方式进行处理,从而有效地避免了外界对于信号的干扰,实现了数据采集和VME总线对于从模块的访问.