Moving Block Signalling System Prototype Utilizing Magnetic Field to Determine Position of a Train

Abstract

The line capacity of fixed block signalling is reciprocal of the minimum headway and is defined as the maximum number of the train that can pass through a stretch of track per unit time for safety reason. By using the Communication Based Train Control (CBTC) technology all trains continuously communicating their exact position. Therefore, the safety distance was no longer a static entity but an adjustable distance (moving block) based on a real-time calculation of the train speed. There will no longer wasted space so the line capacity will increase. The prototype form implemented in three sub-systems, the first one is signal generating system consisting of an oscillator circuit and amplifiers to generate AC signals and flow it to the loop cable produce electromagnetic waves, the signal processing sub-system which serves to read the oscillator signal on the loop cable by using the coil, and data processing and communication sub-system processing signal output and send data to the server. The output of this implementation is sequence number of blocks that have been passed by the train. By using that information we can determine the position of the train.