为满足煤矿掘进设备在复杂井下环境中对高可靠性、实时性和多节点组网通信的需求,设计了一种基于RS-485总线与控制器局域网络(Controller Area Network,CAN)融合的掘进设备本地通信系统。通过构建“高速骨干、低速接入”分层架构,重点...为满足煤矿掘进设备在复杂井下环境中对高可靠性、实时性和多节点组网通信的需求,设计了一种基于RS-485总线与控制器局域网络(Controller Area Network,CAN)融合的掘进设备本地通信系统。通过构建“高速骨干、低速接入”分层架构,重点研究了基于CAN总线高可靠性的短帧传输技术、基于异构网关优先级调度的实时通信技术以及基于分层拓扑的多节点组网扩展技术。实际应用结果表明,该系统能够有效提升掘进设备通信系统的可靠性和实时性,同时具备良好的节点扩展能力。展开更多
Aiming at the weaknesses of LON bus, combining the coexistence of fieldbus and DCS (Distribu ted Control Systems) in control networks, the authors introduce a hierarchical hybrid control network design based on LON an...Aiming at the weaknesses of LON bus, combining the coexistence of fieldbus and DCS (Distribu ted Control Systems) in control networks, the authors introduce a hierarchical hybrid control network design based on LON and master slave RS 422/485 protocol. This design adopts LON as the trunk, master slave RS 422/485 control networks are connected to LON as special subnets by dedicated gateways. It is an implementation method for isomerous control network integration. Data management is ranked according to real time requirements for different network data. The core components, such as control network nodes, router and gateway, are detailed in the paper. The design utilizes both communication advantage of LonWorks technology and the more powerful control ability of universal MCUs or PLCs, thus it greatly increases system response speed and performance cost ratio.展开更多
文摘为满足煤矿掘进设备在复杂井下环境中对高可靠性、实时性和多节点组网通信的需求,设计了一种基于RS-485总线与控制器局域网络(Controller Area Network,CAN)融合的掘进设备本地通信系统。通过构建“高速骨干、低速接入”分层架构,重点研究了基于CAN总线高可靠性的短帧传输技术、基于异构网关优先级调度的实时通信技术以及基于分层拓扑的多节点组网扩展技术。实际应用结果表明,该系统能够有效提升掘进设备通信系统的可靠性和实时性,同时具备良好的节点扩展能力。
文摘Aiming at the weaknesses of LON bus, combining the coexistence of fieldbus and DCS (Distribu ted Control Systems) in control networks, the authors introduce a hierarchical hybrid control network design based on LON and master slave RS 422/485 protocol. This design adopts LON as the trunk, master slave RS 422/485 control networks are connected to LON as special subnets by dedicated gateways. It is an implementation method for isomerous control network integration. Data management is ranked according to real time requirements for different network data. The core components, such as control network nodes, router and gateway, are detailed in the paper. The design utilizes both communication advantage of LonWorks technology and the more powerful control ability of universal MCUs or PLCs, thus it greatly increases system response speed and performance cost ratio.
