On the basis of analyzing common fault phenomena of elevator door system faults,three physical parameters of vibration acceleration,displacement,and current are selected to characterize the operation status of the elevator door system.The experimental platform built is equipped with vibration acceleration sensors,infrared displacement sensors,and hall sensors to collect three operating status data of the door system:vibration acceleration,opening and closing door displacement,and door machine current.Through manually setting faults,common fault characteristic curves of the door system are extracted.By applying elevator door system online monitoring technology,the operation of the door system can be monitored in real-time and the fault point of the door system can be quickly and accurately located.