Degraded Operation Train Positioning and Protection Scheme Based on Beacons

Abstract

Objective When the on-board signaling equipment fails, relying on trackside secondary positioning equipment for degraded operational train positioning and protection requires additional trackside signaling equipment, incurring high costs. Therefore, it is necessary to develop a beacon-based degraded operation train positioning and protection scheme without adding trackside equipment. Method The basic principle and equipment composition of the scheme are introduced, detailing the principles of train positioning and protection. During degraded operation, the on-board beacon-based secondary positioning equipment can read beacon information and transmit it to the trackside ATP (automatic train protection) equipment via a vehicle-wayside wireless communication network. The trackside ATP equipment detects the position of the degraded operational train based on the reported location information from faulty train and controls the opening of protection signal ahead of the degraded train according to line conditions. This safely guides the degraded train to quickly exit operation while ensuring that normal trains receive movement authorization to maintain safe operation intervals between adjacent trains. Result & Conclusion The beacon-based degraded operation train positioning scheme does not require additional trackside equipment, allowing the degraded train to maintain a close protective interval with normal trains, minimizing the impact on the normal operation of subsequent trains, and ensuring high operation organizational efficiency during faults. The feasibility of this scheme is verified by relevant engineering applications and field tests.

Keywords

• urban rail transit
• train positioning equipment
• automatic train protection
• beacon positioning equipment