Patent ID: 7209855

Claim:
A method for filtering information emitted, on the basis of pressure measurements taken by a pressure sensor arranged in a wheel unit mounted on a wheel of a vehicle equipped with a tire, to a central unit mounted on said vehicle, the method comprising that the wheel unit: measures periodically, with a period θ, a value representative of the pressure of the air in the tire, and from this deduces any variations ΔP in pressure between the values of the pressures successively measured, in parallel, with the same period θ, measures a value representative of the temperature of the air in the tire, and, when a variation ΔP in pressure between two successively measured pressure values is greater, in terms of absolute value, than a predetermined threshold Sp, the wheel unit: calculates the variation ΔT between the two temperature values measured at the same instants as said measured pressures, from this deduces a compensation coefficient Cp such that Cp=ΔP/ΔT, and commands the wheel unit to emit a signal representative of a pressure variation to the central unit if: a) ΔT=0, or if b) the compensation coefficient Cp is positive and higher than a determined threshold coefficient Cp1, or if c) the compensation coefficient Cp is negative and does not lie between a minimum threshold and a maximum threshold, wherein the negative pressure variation threshold Spn and the positive pressure variation threshold Spp are distinct in terms of absolute value.