A train positioning mechanism for medium-low speed maglev train based on parity check cross coding inductive loop wire

摘要

Medium-low speed maglev, as a form of urban rail transportation system, has already drawn a lot of attention from researchers and engineers for its advantages of low noise, strong climbing ability and flexible route planning. The train positioning system, as a matter of fact, is a very important part in operation and control system (OCS) of medium-low speed maglev transportation, for it collects real-time train position data, and helps OCS to send correct train dispatching order so as to ensure train operation safety. Cross coding inductive loop wire, which is suitable for the positioning of non-contact moving objects, has been recognized as one of the most promising train positioning method for medium-low speed maglev. However, as reports on cross coding inductive loop wire based train positioning method for medium-low speed maglev transportation system can hardly be found till now, the reliability of absolute address code reading for such positioning method still remains to be discussed and analyzed specifically. In this paper, a novel system design for cross coding inductive loop wire based train positioning system has been proposed, by adding a parity check cross inductive loop line, namely adding a new bit onto the original absolute address code sequence in each minimum positioning section, the reliability of address code reading for train positioning can be evidently enhanced.