Abstract: Through logical analysis of the phenomenon of recovery faults after train arrivals in a semi-automatic receiving station from a departure station, this paper confirms the lighting status of the indicator lights on the console displays of the two stations under fault conditions, observes the operation of the relays in the recovery circuits of the two stations during faults, tests the receiving and sending voltage values and amplitude of the distributing terminal boards  in the signal mechanical rooms of the two stations during faults, and observes the time length of the pulse signal. This paper then makes full use of microcomputer to monitor and replay the fault phenomenon, browses and compares the  voltage curve status, data, amplitude and pulse time curve status and curve lengths of the negative pulses sent and received by the two stations under the fault conditions, so as to accurately determine the fault range, confirm the fault point, and quickly deal with the fault.

Key words: logical analysis, semi-automatic, recovery, pulse length

摘要： 通过逻辑分析半自动接车站、发车站到达复原故障现象，确认故障情况下两站控制台显示器表示灯点灯情况，观察故障情况下两站复原电路继电器动作情况，测试故障情况下两站信号机械室分线盘接收、发送电压数值、幅度，观察脉冲信号时间长度，进而充分运用信号集中监测回放故障现象，浏览比对故障情况下两站发送、接收负脉冲电压曲线状态、数据、幅度以及脉冲时间曲线状态、长度，达到精准判定故障范围，确认故障点，快速处理故障之目的。

关键词: 逻辑分析, 半自动, 复原, 脉冲长度