Integrated cab signal rail navigation system

B - Operations – Transporting – 61 – L

Patent

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Details

B61L 3/20 (2006.01) B61L 3/00 (2006.01) B61L 23/00 (2006.01)

Patent

CA 2226433

The cab signal and rail navigation systems of a railway locomotive are combined to form a single integrated system capable of acting as an automatic train protection system. The train travels along a railway route equipped with a wayside signaling system that features a multiplicity of wayside signal devices. Each wayside signal device provides to the cab signal system a cab signal inclusive of signal aspect information as to how the train should proceed along a particular segment of the railway route. When the train is traveling on a segment of track from which the cab signal is available, the cab signal system receives the cab signal via the AC track circuit disposed on the rails as the train approaches each wayside signal device. After filtering and decoding the electrical cab signal, the cab signal system communicates the deciphered signal aspect information to the rail navigation system. The rail navigation system determines whether signal aspect information should be available from the particular track segment the train is encountering and thus whether and how the brakes of the train will be operated thereon should the train engineer be required and fail to operate the brakes according to one or more braking profiles calculated by the system. The integrated system operates as an automatic train protection system whether the wayside signaling system provides cab signal coverage continuously or noncontinuously throughout the railway route.

Les systèmes de signalisation en cabine et de navigation ferroviaire d'une locomotive sont combinés pour former un système intégré pouvant servir de système automatisé de protection des trains. Ceux-ci circulent sur des voies équipées d'un système de signalisation composé d'une multitude de signaux en bordure de voie. Chacun de ces signaux transmet au système de signalisation en cabine une information sur les consignes de marche le long d'un tronçon particulier de la voie. Lorsque le train circule dans un secteur équipé pour la signalisation en cabine, les signaux sont transmis au train par le circuit de voie en alternatif, à l'approche du signal de bordure de voie. Après filtrage et décodage du signal électrique reçu en cabine, le système de signalisation en cabine communique au système de navigation ferroviaire les informations déchiffrées quant aux consignes de marche. Celui-ci détermine si les consignes s'appliquent au tronçon abordé et, le cas échéant, l'opportunité et les modalités d'application automatique des freins en cas d'absence d'intervention de la part du mécanicien selon un ou plusieurs régimes de freinage calculés. Le système intégré constitue un système automatisé de protection du train même sur un trajet où la signalisation en cabine est intermittente.

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