在现代仪器仪表技术蓬勃发展的今天，实现远程实时监管的网络化测控系统成为亟待解决的问题。论文深入分析了目前主流的 VXI 、PXI 、LXI 等仪器总线，结合互联网技术，采用以太网互连规程作为仪器的内部总线，按照仪器测量的性能要求进行改进，提出嵌入式 LXI 网络仪器的设计思想和方案；将传统仪器中各部分板卡功能分布到基于局域网互连的不同模块中，扩展了仪器模块的互联距离，解决了仪器模块远距离分布到被测对象所在地问题，使得仪器模块相互之间的连接以及监控、数据交换更加灵活；通过搭建8个仪器模块的以太网总线仪器，对 LXI 网络仪器功能进行验证和仿真。测试结果证明此方案可行。%In today's networked instruments flourish , to realize the remote real‐time accurate control of networked measurement and control system become a problem to be solved .In this paper ,in‐depth analysis of the current mainstream of VXI ,PXI bus and LXI instrument is done ,combined with the Internet technology ,Ethernet technology is used as the instrument's internal bus ,in accordance with the requirements for the performance of the instrument measuring is improved , the design thought and scheme of the embedded LXI instrument network are put forward .The traditional instruments in all parts of the card are distributed to different module based on local area network interconnection ,the instrument module inter‐connection distance is expanded ,the problem of instrument module distribution over a long distance to the object to be tested in local place is solved ,connection of the instrument modules each other as well as monitoring ,data exchange more flexible . Through local area network set up eight instrument module ,according to the design idea of this scheme to validate its func‐tion and the simulation .Test results show that the scheme is feasible .
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