关键词: 地铁屏蔽门, 故障监测, 继电器, 在线监测, 离线检测

Abstract: Based on the fault monitoring of subway platform screen door (PSD), the methods of on-line monitoring and off-line detection of PSD relay are studied. The online monitoring system is capable of real-time monitoring of key circuits and relay contacts in control circuits, displaying faulty circuits, narrowing down fault queries, recording performance indicators of monitoring points, analyzing and comparing long-term change patterns of monitoring points, alarming and indicating the location of faults when safety thresholds are exceeded. The system design is based on the Fail safe principle, and effective isolation measures are adopted to arrange the sensors without interfering with the normal operation of the existing equipment. Off-line detection system makes up for the measurement limitation of on-line monitoring, provides all the electrical parameters of the PSD relay, and provides a test standard for the thorough repair of faulty relays.

Key words: PSD, fault monitoring, relay, on-line monitoring, off-line detection