Subway train collision-avoidance early-warning device and method thereof

The invention discloses a subway train collision-avoidance early-warning device and a method thereof. The subway train collision-avoidance early-warning device comprises RFID (radio frequency identity) tags and vehicular devices, the RFID tags are arranged on subway rails according to set intervals, one vehicular device is arranged on each subway train and comprises a computing and control module, a tag reader, an inertial navigation device and a wireless transceiving device, wherein the tag reader, the inertial navigation device and the wireless transceiving device are connected with the computing and control module. By combined positioning of the RFID tags and the inertial navigation device, real-time position information of the subway trains can be continuously and accurately acquired. Anti-interference effect is good since the double-frequency wireless transceiving device is adopted for communication with adjacent trains. Distance between trains nearby can be calculated, alarm signals can be transmitted, and automation degree is high. The system can provide accurate train positioning information to be used for train scheduling management. The subway train collision-avoidance early-warning device can be widely used for running safety early warning for subway trains, reducing collision risk and realizing safety running.