全电子自动复原道岔模块的研究

介绍一种全电子计算机联锁四线制道岔自动复原模块,来取代原来安全型继电器组成的道岔执行电路。全电子计算机联锁模块主要有微控制器MCU、可编程逻辑器件CPLD、道岔驱动电路、道岔表示电路、道岔检测电路和自动复原电路等组成。自动恢复电路包括驱动电路和继电器等组成。计算机联锁系统通过定位和反位检测单元检测电路中是否有表示电压,来决定微控制器MCU计时与否。道岔由定位转向反位或由反位转向定位时,若在规定的时间不能密贴,微控制器MCU发出继电器Js驱动指令,驱动继电器Js动作,通过继电器Js的接点,控制系统发出相反的转换指令,使道岔自动恢复到原来的位置。最后,提出了软件设计方案,用流程图对软件工作原理进行了说明。

Research on All electronic Switch Automatic Recovery Module

The automatic recovery module of four-wire switch of all electronic computer interlocking systems is introduced to replace the former switch executive circuit made of safety relay. The module includes micro-programmed control unit,complex programmable logic device,switch driving circuit,switch indication circuit, switch detection circuit and automatic recovery circuit. The computer interlocking system determines the MCU timing when there is an indicative voltage in the positioning and reversing detection units. When the timer reaches pre-set time and the switch fails to close at the stipulation time,MCU activates electric relay Js and the control system sends out reversed switching order for automatic recovery via Js contact. Finally,the scheme of software design is proposed and the working principle of the software is illustrated with flow chart.