Method and system for proximity detection and location determination
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United States of America Patent
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Apr 17, 2001
Grant Date -
N/A
app pub date -
Feb 20, 1998
filing date -
Oct 23, 1996
priority date (Note) -
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Abstract
A system and method for preventing collisions between vehicles, such as railway vehicles, by exchanging data regarding track position of the vehicles. By use of an on-board track database, the system provides an indication of the distance between vehicles based not on line-of-sight but on track distance. Additionally, a system and method for accurately determining location of railway vehicles without the use of a network of trackside indicators. The disclosed system uses a gyro, position indicator, and a satellite position determination along with a track database to maintain highly accurate estimates of measurement errors and track position.
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