Method and system for compensating for wheel wear on a train

  • US 6,970,774 B2
  • Filed: 11/26/2003
  • Issued: 11/29/2005
  • Est. Priority Date: 05/31/2002
  • Status: Active Grant
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First Claim
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1. A system for correcting errors in train movement information caused by wear of a wheel of a train, the system comprising:

  • a control unit;

    a memory connected to the control unit;

    a positioning system in communication with the control unit, the positioning system being configured to provide the control unit with position information pertaining to the train; and

    a wheel sensor connected to the control unit, the wheel sensor being configured to measure rotation of a train wheel;

    wherein the control unit is configured to perform the steps of determining a distance traveled by the train over an interval by calculating a difference in positions reported by the positioning system at the start of the interval and the end of the interval;

    obtaining wheel rotation information from the wheel sensor over the interval;

    determining a new size of the wheel based on the distance traveled and wheel rotation information;

    calculating a correction factor based on the new wheel size and a nominal wheel size; and

    correcting train movement information indicated by the wheel sensor using the correction factor.

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