多主从模式高速仪器内部总线设计与实现  

Design and implementation of multi⁃master⁃slave mode high⁃speed instrument internal bus

作　　者：周建琼 李谦[1] ZHOU Jianqiong;LI Qian(Oilfield Technology Research Institute of China Oilfield Services Co.,Ltd.,Beijing 101149,China)

机构地区：[1]中海油田服务股份有限公司油田技术研究院,北京101149

出　　处：《电子设计工程》2023年第19期45-48,共4页Electronic Design Engineering

摘　　要：针对测井仪器内部信号节点的特点和需求,采用了一种基于485总线的多主从工作模式的仪器内部通信总线,通过硬件优化改进总线数据收发逻辑,定义总线数据帧格式和节点地址来完成总线的竞争,从而实现了总线上各个节点均具备主动发起总线通信的功能。结合实际的测试,得出仪器内部各个节点之间完全按照预先设计的流程协同合作,完全满足仪器内部信号采集单元之间总线通信和协同工作的要求。In view of the characteristics and requirements of the internal signal nodes of logging tools,a multi-master-slave communication bus based on 485 bus is adopted.By optimizing the hardware,improving the logic of sending and receiving bus data,defining the format of bus data frame and node address to complete the bus competition.Thus,each node on the bus has the function of initiating the bus communication.Combined with the actual test,it is concluded that all nodes in the instrument cooperate with each other in accordance with the designed process,which fully meets the requirements of bus communication and cooperative work between signal acquisition units in the instrument.

关 键 词：485总线 多主从工作模式 仪器内部总线 总线竞争 

分 类 号：TN914.3[电子电信—通信与信息系统]