Patent ID: 7650802

Claim:
A bearing assembly comprising: a stationary ring, a rotary ring, at least one row of rolling bodies disposed in a raceway formed between said rings enabling the rolling bodies to rotate relative to each other, wherein said rolling bodies are distributed uniformly in the raceway with an angular spacing λ therebetween, at least one determination system for determining an amplitude of pseudo-sinusoidal deformations of a zone of the stationary ring that are induced during the rotation, the at least one determination system comprises: four strain gauges, each of which delivers a signal as a function of the deformation to which said gauge is subjected, said gauges being distributed uniformly within said zone and spaced apart at a distance equal to λ/4; a measurement device for measuring four signals V i , each of which is a function of time variations of the signal emitted by a respective gauge during the rotation, said device being suitable, by combining the four signals V i , for forming two signals SIN and COS of a same angle and of a same amplitude; and a computation device which computes the amplitude of the deformations of the zone as a function of time, said computation device being arranged to compute an expression SIN 2 +COS 2 to deduce the amplitude therefrom.