Method and apparatus for detecting wheel motion in a tire pressure monitoring system
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United States of America Patent
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Sep 12, 2006
Grant Date -
Apr 21, 2005
app pub date -
Sep 8, 2004
filing date -
Sep 10, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus for detecting motion of a wheel comprising tyre. The apparatus comprises a pressure sensor for measuring the tyre pressure and generating a signal corresponding to the measured tyre pressure, and means for detecting a component of said signal that corresponds to, or is generated by, vibrations of the tyre. Upon detection of the signal component, the apparatus determines that the wheel is in motion. The detecting means may arranged to detect an audio signal component or signal components having a frequency in the range 200 Hz to 300 Hz.
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