Tire parameter monitoring system with inductive power source
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United States of America Patent
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Apr 29, 2008
Grant Date -
Dec 27, 2007
app pub date -
Jun 22, 2006
filing date -
Jun 22, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A battery-less tire parameter sensor system for monitoring a vehicle tire parameter such as pressure and temperature. A sensor assembly has a power system, a processor/transmitter, a sensor, and a power coil mounted on a substrate. This assembly is mounted on or in the side wall or tread wall of a tire. A magnet is mounted on the vehicle in proximity to the path of the power coil during tire rotation. The moving power coil passes through the magnetic field and generates operating voltage for the sensor assembly components. The power system includes a voltage multiplier, a voltage regulator, and a storage capacitor. Two or more sensor assemblies can be mounted on the same tire to monitor different parameters.
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