Method and device for determining the rotation frequency of wheels of vehicles

A device for determining the rotation frequency of at least one wheel of a vehicle comprising:

• first measuring means for measuring an acceleration value of the at least one wheel,
• second measuring means for measuring vibrations of the at least one wheel, and
• a processing unit configured to:
• determine a first rotation frequency of the at least one wheel from the measured acceleration value of the at least one wheel,
• compare the determined first rotation frequency of the at least one wheel to a first threshold,
• define a frequency analysis interval from the determined first rotation frequency greater than the first threshold,
• wherein the first threshold is 4.2 Hz,
• process a frequency analysis of a signal indicative of vibrations of the at least one wheel for the frequencies inside the frequency analysis interval, and
• select a second rotation frequency in the frequency analysis interval having a higher amplitude, the second rotation frequency being equal to the rotation frequency of the at least one wheel,
• measure a second acceleration value of the at least one wheel after a predetermined duration.

A wheel of a vehicle comprising:

• a device for determining the rotation frequency of at least one wheel providing first measuring means for measuring an acceleration value of the at least one wheel, second measuring means for measuring vibrations of the at least one wheel, and a processing unit configured to:
• determine a first rotation frequency of the at least one wheel from the measured acceleration value of the at least one wheel,
• compare the determined first rotation frequency of the at least one wheel to a first threshold,
• wherein the first threshold is 4.2 Hz,
• define a frequency analysis interval from the determined first rotation frequency greater than the first threshold,
• process a frequency analysis of a signal indicative of vibrations of the at least one wheel for the frequencies inside the frequency analysis interval, and
• select a second rotation frequency in the frequency analysis interval having a higher amplitude, the second rotation frequency being equal to the rotation frequency of the at least one wheel.