Patent ID: 8790013

Claim:
A bearing comprising: an outer ring, an inner ring, and rolling elements therebetween, and wherein the outer ring comprises: an outer ring first face, which comprises an outer ring raceway, and an outer ring second face located on an opposite side of the outer ring in relation to the outer ring first face, and wherein the inner ring comprises an inner ring first face, which comprises an inner ring raceway, and an inner ring second face located on an opposite side of the inner ring in relation to the inner ring first surface, and wherein the rolling elements coupling together the inner and outer ring through the inner and outer ring raceways, to thereby enable a relative movement between the outer and inner ring, wherein at least one of the inner and outer ring second face comprises a continuous groove substantially parallel to a direction of the enabled relative movement between the outer and inner ring, to thereby weaken the corresponding outer or inner ring, and wherein the groove further comprises a continuous indentation along the direction of the enabled relative movement, the indentation being configured to accommodate a Bragg grated optical fibre, the bearing further including the Bragg grated optical fibre in the indentation and mounted such that it can sense a condition and load of the bearing, wherein the groove increases the sensitivity of the fibre to both load variations and vibrations of the bearing.