Patent ID: 7650254
Filing Date: 2010-01-19
Classification: F16C,G01M

Abstract:
1. A method for determination of a balance error of a component mounted in an antifriction bearing, wherein the antifriction bearing includes a ring attached to the component, another ring and rolling elements between the rings and includes sensors arranged on the antifriction bearing in measuring bridges, wherein the sensors change their respective electric resistances as a function of pressure on the sensors; the method comprising: determining static and dynamic forces acting on the antifriction bearing with the sensors and the bridges and providing the determined forces to an evaluation device for analysis, wherein the determined forces are provided in the form of a periodic and amplitude-modulated measured signal which is common to both the static and dynamic forces; determining periods and frequencies of an oscillation produced by the dynamic force and determining a variation of the periods of the oscillation produced by the dynamic force, comparing the determined variation with a predefined variation threshold value, such that when the determined variation falls below the predefined variation threshold value, it is assessed as an indication of a balance error of the component mounted in the antifriction bearing; determining minimum and maximum signal amplitudes of the periods of the measured signal; and freeing a curve of the minimum and maximum signal amplitudes from an effect of the static force acting on the antifriction bearing, and wherein the step of determining the periods of the oscillation produced by the dynamic force includes determining the periods from the curve of the minimum and maximum signal amplitudes, which has been freed from the effect of the static force acting on the antifriction bearing, by interpolation over time.