Device for determining a contact surface length of a vehicle tire
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United States of America Patent
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May 21, 2013
Grant Date -
Jun 9, 2011
app pub date -
Dec 9, 2010
filing date -
Dec 9, 2009
priority date (Note) -
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Abstract
An apparatus ascertains a contact area length of a vehicle tire. The apparatus has a transmission unit which has a resonator and which is set up to transmit a sensor signal at a defined frequency. A change in the frequency of the sensor signal on the basis of mechanical excitation of the resonator is indicative of a contact area length for the vehicle tire. Furthermore, the apparatus has a contact area length ascertainment unit which is set up to receive the sensor signal and to take the change in the frequency of the sensor signal as a basis for ascertaining the contact area length of the vehicle tire.
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