Patent ID: 8552777

Claim:
A method for adjusting a time base of a wheel unit ( 10 ) of a system for monitoring the pressure of tires, each wheel unit comprising at least sensors of temperature ( 14 ) and of pressure ( 16 ) in conjunction with a signal control circuit ( 12 ), the sensors ( 14 , 16 ) being activated according to an LFO circuit time base ( 24 ) integrated into the control circuit ( 12 ), an RF emission circuit ( 20 ) of each wheel unit ( 10 ), transmits stored data ( 18 ) as well as an identifier of the wheel unit ( 10 ) to a central unit of the system, the emission circuit being regulated by a high-precision clock ( 26 ), characterized in that, in each wheel unit ( 10 ), a variation (ΔTi) between a measured temperature (Ti) and a previously measured reference temperature is compared ( 120 ) with a variation threshold (ΔT) and in that a drift between the periods of the time base of the LFO circuit ( 24 ) and of the transmission clock ( 26 ) is determined, the drift being taken into account ( 140 ) so as to synchronize the time base to the period of the clock if the temperature variation (ΔTi) is greater than this threshold (ΔT).