Method of wheel calibration
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United States of America Patent
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May 17, 2022
Grant Date -
Apr 9, 2020
app pub date -
Oct 9, 2018
filing date -
Oct 9, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
In a method of determining a radius or diameter of a train wheel, a camera mounted on a train acquires first and second images (pictures) of first and second objects spaced along a path being traveled by the train. Matches are then determined between the first and second objects appearing in the first and second acquired images and representations (pictures) of the first and second objects appearing in prerecorded images included in a track database that include corresponding first and second geographical locations. A distance L traveled by the train between the first and second geographical locations is determined and a sum C of electrical pulses generated by an encoder coupled to the train wheel during travel of the train the distance L is determined. Based on the distance L and the sum C, a diameter or radius of the wheel is determined.
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