Location in railway traffic: generation of a digital map for secure applications

Abstract

This paper presents the modelling scheme for a digital map based on the nodelink model. To use this map in combination with a sensor system that recognises turnouts by detection and classification of their components, these reference points must be modelled as spatially expanded objects and thus the node-link model must be extended. The digital map consists of the topological and geometrical level. Both levels are modelled using the Extended Entity-Relationship Model and hence easy implementation into a data base is given. The generation of the digital map for a small secondary line demonstrates performance of the successful modelling scheme. A location system for secure applications can be obtained by using an eddy current sensor system in combination with the proposed digital map.