Study on Absolute Positioning Technique for Medium-Low Speed Maglev Train Based on Cross Coding Inductive Loop Wire

During recent years, the medium-low speed maglev system brings new chances for the development of maglev train related techniques, and traditional operation and control standards have been applied in its signal system design. However, as there are no wheel sets on maglev train, the positioning function cannot be realized by the corresponding method in wheel-rail based urban rail transit. Many related research has already proved that the absolute positioning can be realized by parallel arranged cross coding inductive loop wires with different cross cycles itself without transponders; however, the performance and the precision of positioning for maglev system by using such positioning method still requires to be demonstrated. In this paper, based on a thorough study on cross inductive loop wire which have been applied in different areas, a system design for medium-low speed maglev train positioning based on cross coding inductive loop wire has been proposed, and the arrangement of address line has also been optimized. Performance analysis has shown that the feasibility of the system design and has proved that the optimization of radio arrangement can double the accuracy in train positioning.