In order to solve the fault problem of platform shielded door of subway

control system of the platform shielded door of Shanghai Metro Line 2 is taken as the object of analysis

and a remote monitoring and alarm system of platform shielded door state based on cloud service is designed. The system uses high-performance and low power consumption STM32 F103 as the main control unit

respectively

using Casco ’s shielded door voltage acquisition sensor

leakage current sensor and thin camera to obtain voltage

current and train wayside communication（ TWC） signal of relay which control shielded door

through RJ45 network port

this information pass back to the remote monitoring center platform. On the Myeclipse platform

Java language is used to develop remote monitoring center platform

by calling ECharts API

visualization and the real-time of data information are realized

and returned information are saved in database.