Apparatus and method for measuring a tire pressure from the tire footprint
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United States of America Patent
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Sep 16, 2014
Grant Date -
Jul 25, 2013
app pub date -
Jul 11, 2011
filing date -
Jul 9, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus for measuring the pressure of a tire on a moving vehicle, comprising measuring device (14, 18, 24) which is provided on or inside a floor or ground so as to interact with the tire and which generates an electronically analyzable measurement signal in reaction to the tire driving over the measuring device, and analysis unit (22, 40) which output a tire pressure signal corresponding to the tire pressure in reaction to the measurement signal. The measuring device includes an optical unit (18) for acquiring a tire width as the width of a tire footprint forming when the tire drives over the floor/ground. The analysis unit is designed to determine a footprint length from a series of tire width data generated by the optical unit and/or from a pattern of a pressure measurement signal generated by the measuring device and to determine the tire pressure from a footprint area calculated as a function of the length and width of the footprint and from a force applied to the footprint area by the tire.
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