Patent ID: 7756671

Claim:
A method of timing a remarkable angular position (θ R ) of at least one pair of sensors, having a right sensor and a left sensor, carried by a tire rotating relative to an external frame of reference, the pair of sensors being positioned substantially symmetrically about a midplane of the tire and being arranged to measure deformation in a portion of the tire, the deformation being remarkable when passing close to contact area of the tire, wherein the method comprises the steps of: forming, from an output signal (s(t)) from the sensors, a reference signal (s r (t)) suitable for presenting a remarkable extremum during one revolution of the tire; determining the time (t 0 ) of an origin angular position (θ 0 ) of the sensors as being the time of the remarkable extremum of the reference signal; and determining the time (t R ) of the remarkable angular position (θ R ) relative to the time of the origin angular position to obtain a measurement of deformation at the remarkable angular position (θ R ); and outputting the measurement for evaluation of tire deformation, wherein the reference signal (s r (t)) is formed by applying a predetermined function (f(s)) to each of the output signals (s d (t), s g (t)) of the sensors, and combining the outputs (f(s d (t)), f(s g (t))) of the predetermined function to obtain the reference signal (s r (t).