A RAILWAY COLLISION AVOIDANCE SYSTEM (RACAS)

摘要

THE INVENTION PROVIDES A RAILWAY COLLISION AVOIDANCE SYSTEM (RACAS) WHICH IS OF RELATIVELY SIMPLE DESIGN, COMPACT CONSTRUCTION AND CAPABLE OF ESTABLISHING A RELIABLE CONNECTIVITY WITH EVERY TRAIN LYING WITHIN A RANGE OF 1 500-3000 METRE AND OPERATING THE BRAKING ACTION TO AVOID COLLISION BETWEEN TRAINS RUNNING ON A COMMON TRACK, OPERABLE FROM A QUASI-CONNECTIVITY PROTOCOL (FORMAT) COMPRISING AN UNNUMBERED INFORMATION FRAME HAVING AN ADDITIONAL 1 MS TRAINING (LEARNING) SEQUENCE CONSISTING OF 26.04 US PULSES BEFORE EVERY START FLAG WITHOUT REQUIRING ACKNOWLEDGEMENT SIGNAL OF THE RECEIPT OF GOOD PACKETS BEFORE TRANSMITTING THE NEXT FRAME OF DATA, AND COMPRISES A PAIR OF MICROCONTROLLER BASED RADIO SIGNAL TRANSPONDERS INSTALLED ONE EACH IN THE DRIVER'S CABIN AND GUARD'S CABIN OF A TRAIN, EACH TRANSPONDER BEING ALLOTTED A UNIQUE IDENTITY TAG CORRESPONDING TO THE NAME OF THE TRAIN AND OF THE TRACK ON WHICH THE TRAIN IS RUNNING; A CONTROL DESK CONTAINING AN ANTI-COLLISION CONTROL (ACC) AND OTHER ACCESSORIES MOUNTED IN THE DRIVER'S CABIN; STATIC BEACONS (SB) INSTALLED AT INTERVALS ALONG THE TRACK; AND STATION PACKET TERMINALS (SPT) INSTALLED ONE EACH AT THE IMPORTANT RAILWAY STATIONS LYING ALONG THE TRACK.