A Research of the Positioning System for Rail Transit Based on Wireless Sensor Networks
The paper provides a method to establish a system for monitoring the arrival time of trains or subway trains, and their real-time positions and speeds during runtime. The system consists of wireless sensor nodes along the tracks and in the gateways at stations, which are connected to a central control room. The monitoring principle is the following: (1) when a train or subway train is entering the detection area, the related nodes will work and monitor data including the real-time positions and speeds; (2) when all data are obtained, the nodes will process the data and transfer the data to the gateways; (3) the gateways will further process the data and transfer the data to the central control room. Then, the central control room will provide the information of the arrival time, real-time positions and speeds of trains or subway trains to each station. Apparently, this system and method will provide a base for the safely automatic operation of trains or subway trains.
L. X. Hu et al., "A Research of the Positioning System for Rail Transit Based on Wireless Sensor Networks", Applied Mechanics and Materials, Vols. 229-231, pp. 1276-1279, 2012