一种全双工智能总线的研究  

Research on the Full Duplex Intelligent Bus

作　　者：张莉[1] 邬宝寅 

机构地区：[1]郑州科技学院机械工程学院,河南郑州450064 [2]新天科技股份有限公司,河南郑州450001

出　　处：《自动化仪表》2018年第2期50-53,共4页Process Automation Instrumentation

基　　金：河南省高等学校重点科研基金资助项目(16A460027)

摘　　要：基于半双工非主从式和全双工主从式两种通信方式,研究了一种基于差分信号的非主从式全双工结构的智能总线,并设计了该总线系统的硬件结构和基本协议。总线数据由上行、下行方向两路独立工作的单向差分信号构成。总线设备通过独特的硬件和基本协议,实现了缓存-中继功能,实时中继传导上行、下行通信数据;或在有数据发送请求时抢占发送,缓存-中继传导上行、下行通信数据,从而实现较远距离、较多设备情况下的稳定传输。总线上任意设备之间的全双工通信兼顾了数据传输的效率和协调性,解决了一般半双工或全双工总线实时发送数据时的总线冲突问题。总线设备可以通过获取总线中的"位置"来得到唯一地址,并且通过周期性进入寻址状态,实现了总线断线检测和设备热插拔。Based on the half duplex nonmasterslave and full duplex masterslave communication modes,a full duplex nonmasterslave intelligent bus based on differential signal has been studied,and the hardware structure and basic protocol of this bus system are designed.The data transmission of the bus consists of two singledirection differential signals which are independent of the uplink and downlink directions.Bus device achieves cacherelay function through the unique hardware and basic protocol,it relays and transmits uplink and downlink communication data in real time,or preemptively send when a sending data request occurs,then caches and relays uplink and downlink communication data,so the long distance stable data transmission for more devices can be implemented. The full duplex communication among any device on the bus takes into account both the efficiency and coordination of data transmission,so the bus conflict of general half duplex or full duplex bus in real time data transmitting is solved. The bus device can obtain the unique address through the “position” on the bus and enter the addressing state periodically,to achieve bus disconnection detection and device hot swapping.

关 键 词：智能总线 非主从式 全双工 缓存-中继 差分信号 通信 

分 类 号：TH86[机械工程—仪器科学与技术] TP36[机械工程—精密仪器及机械]