Method and apparatus for detecting wheel motion in a tyre pressure monitoring system
First Claim
1. An apparatus for detecting motion of a wheel comprising a tyre, the apparatus comprising a pressure sensor arranged to measure the tyre pressure and to generate a signal corresponding to the measured tyre pressure;
- and means for detecting a component of said signal that corresponds to vibrations of the tyre, wherein, upon detection of said signal component, the apparatus determines that the wheel is in motion.
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Accused Products
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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Citations
13 Claims
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1. An apparatus for detecting motion of a wheel comprising a tyre, the apparatus comprising a pressure sensor arranged to measure the tyre pressure and to generate a signal corresponding to the measured tyre pressure;
- and means for detecting a component of said signal that corresponds to vibrations of the tyre, wherein, upon detection of said signal component, the apparatus determines that the wheel is in motion.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of detecting motion of a wheel comprising a tyre, the method comprising measuring the tyre pressure;
- generating a signal corresponding to the measured tyre pressure;
detecting a signal component of said signal that corresponds to vibrations of the tyre; and
, upon detection of said signal component, determining that the wheel is in motion. - View Dependent Claims (11, 12, 13)
- generating a signal corresponding to the measured tyre pressure;
Specification