System and method for vitally determining position and position uncertainty of a railroad vehicle employing diverse sensors including a global positioning system sensor
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United States of America Patent
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Oct 23, 2012
Grant Date -
Dec 9, 2010
app pub date -
Jun 8, 2009
filing date -
Jun 8, 2009
priority date (Note) -
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Abstract
A system vitally determines a position of a train. The system includes a plurality of diverse sensors, such as tachometers and accelerometers, structured to repetitively sense at least change in position and acceleration of the train, a global positioning system sensor, which is diverse from each of the diverse sensors, structured to repetitively sense position of the train, and a track map including a plurality of track segments which may be occupied by the train. A processor cooperates with the diverse sensors, the global positioning system sensor and the track map. The processor includes a routine structured to provide measurement uncertainty for each of the diverse sensors and the global positioning system sensor. The routine cross-checks measurements for the diverse sensors, and cross-checks the global positioning system sensor against the track map. The routine provides the vitally determined position of the train and the uncertainty of the vitally determined position.
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