Contactless measurement of the stress of rotating parts

摘要

The invention relates to a method for measuring mechanical stresses of a rotating part ( 1 ) in an essentially closed metal housing. The rotating part comprises a sensor ( 2 ) which reflects electromagnetic waves and which can be measurably deformed as a result of a mechanical stress exerted on said rotating part ( 1 ) The two antennas (A 1 , A 2 ) receiving the reflected signals of the sensor ( 2 ) are arranged in the bearing housing ( 10 ) in such a way that they cannot rotate in relation to the sensor and are distanced (alpha). Said antennas emit receiving signals (a 1 ,a 2 ) which are sent to an electronic evaluation system ( 20,21 ) which measures the mechanical stresses of the rotating part ( 1 ) on the basis of both receiving signals (a 1 ,a 2 ).