摘要
操作表示机是计算机联锁系统中关键的人机界面设备,硬件上利用继电器组成的逻辑电路,实现双机热备的倒机逻辑控制和设备接口电缆的动态切换.同时提供人工切换手段;软件上采用TCP/IP协议完成主备机之间的数据同步和操作信息的传送,并控制继电器电路完成自动切换,从而实现了操作表示机双机热备.
Control and display machine is the key device of Man_Machine Interface in computer based interlocking system. The realization of control and display machine with dual computers is using logic circuit made up of relays in hardware, which is used for the logic control of dual computers and for the dynamic connection of peripheral equipment cables as well as the manual_switch between primary and standby computers, also using TCP/IP protocol in software for the data synchronization and the operation information communication between two computers and for the auto_switch control. This paper introduces the hardware and software mechanism of this scheme in detail, and brings out the logic frame figures for the hardware and software implementation.
出处
《北方交通大学学报》
CSCD
北大核心
2003年第5期69-72,共4页
Journal of Northern Jiaotong University
关键词
铁路信号
计算机联锁
操作表示机
双机热备
railroad signal
computer based interlocking
control and display machine
dual computers
