TRAIN POSITION DETECTION SYSTEM

摘要

This train position detection system comprises: an on-board device (3) mounted to a train (2) that travels along a predetermined track (1); an onboard wireless unit (4) mounted to the train (2); a trackside wireless unit (6) which is installed at a predetermined position on the track (1) and which performs transmission and reception with the onboard wireless unit (4); a ground-based device (7) which is connected to the trackside wireless unit (6); and an absolute position acquiring means which acquires the absolute position of the train (2) for each predetermined interval. The onboard device transmits absolute position information for the train (2) acquired by the absolute position acquiring means to the ground-based device (7) via the ground wireless unit (4) and the trackside wireless unit (6), and the ground-based device (7) detects the train position on the basis of the propagation time for radio waves between the onboard wireless unit (4) and the trackside wireless unit, and corrects the detected train position on the basis of the absolute position information for the train (2) transmitted from the onboard device (3).