A Track Circuit Signal Simulation System for Interlocking Test

Abstract

The simulation system for interlocking test emulated track circuit signals and transmitted signals to interlocking system for verification of the track circuit relays’ connection. According to the integration of chart-module method, a database of primitive elements was built, and the station yard was decomposed to these primitive elements. When assembling these components together, the topology of station yard model was set up automatically, and the consistency was checked. All these components were combined into logical hierarchical models, finally to compose the station yard. The binary tree structure of station yard layout was designed, and a route arrangement method was proposed by the binary tree searching algorithm. Driving simulation was carried out to simulate the track circuit signals’ changing. These signals were transmitted to interlocking system’s relays. The simulation system was verified in Longtan station of the Shanghai–Nanjing Railway, and it worked fine.