针对二极管击穿开路、短路,结合微机监测预判导向安全电路修改方案的探讨  

Discussionon the Modification Scheme of Safety Circuit Guided by Computer Monitoringand Prediction in View of Diode Breakdown Open Circuit and Short Circuit

作　　者：田传杰 杨志明 Tian Chuanjie;Yang Zhiming(Nanchang Railway Bureau Group Company,Jiangxi Nanchang 354215)

机构地区：[1]南昌铁路局集团公司,江西南昌354215

出　　处：《石家庄铁路职业技术学院学报》2020年第3期80-83,共4页Journal of Shijiazhuang Institute of Railway Technology

摘　　要：提速道岔表示电路中二极管采用三串三并安全冗余结构,目的是为了通过采用冗余措施使二极管回路一条击穿开路后还有两路回路保证其稳定工作,但二极管除了沟通表示回路以外还承担了1DQJ缓放时形成“小台阶”的电流,这样二极管经过多次被冲击后可能出现冗余结构被击穿开路或者短路的情况,但这种情况在微机监测或者现场测试是没有办法提前预料的,也就是说我们没有办法提前预判,直到二极管彻底损坏道岔没有表示才能表现出来。Diode in the indication circuit of speed-up switch adopts the redundant structure for safety of three series connections and three parallel connections.The purpose is to ensure that there are still two circuits operating stably after one diode circuit is broken down by adopting redundancy measures.However,the diode not only communicates with the indication circuit,but also bears the current of"small step"formed during 1dqj slow release.In this way,after repeatedly impacted,the redundant structure of the diode may be breakthrough or short-circuit,which cannot be predicted through computer monitoring or field test.In other words,we cannot notice in advance until the diode is totally breakdown,and the switch has no indication.

关 键 词：提速道岔表示电路 “三串三并安全冗余结构” 

分 类 号：U284.2[交通运输工程—交通信息工程及控制]