Solution to Track Section Occupation Using Multi-sensor

To handle the bad shunting of track circuit, a solution using multi-sensors was proposed to solve the track section occupancy. Different layouts of three types of sensors, i.e., the infrared sensor, proximity switch and distance measurement sensor, were used in data collection. Based on D-S evidence theory, track occupancy detection model was constructed. The Petri net model of detecting track section occupation operating at the lower computer was used to realize axis counting and examine track occupancy at upper monitor, which provides a basis for railway traffic control. Analysis shows that the wrong side failure rate of the proposed solution is 10-7, and that the MTBF (mean time between failure) reaches up to 105 h, which could meet the reliability and safety requirement of railway application. Compared with conventional track circuit, the correct rate of this solution dealing with track section occupancy is increased by 20%.