Train Video Positioning

摘要

This paper describes the development of a train positioning system using video technology. The system hasrnbeen designed to overcome limitations in existing speed and position measurement sensors used in ERTMS. It isrna low cost system that can be rapidly fitted in the cab, leading to improved availability and maintainabilityrncompared with sensors installed in the harsh environment outside the train. Fitment of a second device at thernrear of the train offers a solution for train integrity.rnThe R&D work was undertaken because of a widespread perception that signalling costs are too high and thatrnthere is insufficient innovation taking place in the industry. In particular, the need to retrofit rolling stock withrnpre-1980s technology severely impacts the business case for ERTMS and the rate of roll-out. This paperrndescribes the experiences of carrying out innovative R&D work in this safety-related industry and concludesrnwith lessons learned for the future.