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Schaeffler Technologies Ag & Co .kg

Fag Kugelfischer Georg Schafer

Schaeffler Kg

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Sven Gempper

Joachim Hering

Jens Heim

Edgar Streit

Alfred Pecher

Josef Bernhard

Rainer Wansch

Wolfgang Ehrfeld

Wolfram Strauss

Stefan Glück

Horst Masuch

Frank Michel

Stefan Scharting

Volker Graeff

Timo Schmidt

Vasilis Hassiotis

Henri Van Der Knokke

The invention relates to a method and a computer programme for detecting the stationary state of a roller bearing, comprising z rolling bodies, where z is a whole number, preferably an even number, to which a sensor arrangement is fixed, delivering a sinusoidal signal, dependent on the rotational position of the bearing on the rotation of the roller bearing. Said sinusoidal signal is sampled, whereupon sampled values are determined. According to the invention, a first average value (MW) of the sampled values of a first time interval (J) is determined (S), whereupon the corresponding average value (MW, MW) of other time intervals (J, J) is determined (S). The roller bearing is considered stationary as long as A) the corresponding average value (MW, MW) of the other time intervals (J, J) does not differ (S) significantly from the first average value (MW) and/or B) the gradient between the first average value (MW) and the corresponding average value (MW, MW) of the other time intervals does not differ significantly from 0 (S). The invention further relates to a roller bearing, provided with an analytical device for carrying out the inventive method or the computer programme.

Method and computer programme for detecting the stationary state of a roller bearing and a roller bearing which may be analyzed thus

A meter bearing with a recess located at the periphery of at least one of the bearing rings. Expansion-measuring strips are disposed in the recess and conducting paths and electronic modules are arranged on a supporting material and evaluate and transmit the output signals of the expansion-measuring strips. The expansion-measuring strips are connected to the electrical conducting paths which extend to the electronic modules. In order to reduce the space required for such a measuring and evaluation system in a meter bearing, the expansion-measuring strips are placed below and/or above the radial plane of the supporting material and of the conductor paths and electronic modules located thereupon.

Meter bearing comprising an integrated data detection and processing system

The invention relates to a method for measuring mechanical stresses of a rotating part () in an essentially closed metal housing. The rotating part comprises a sensor () which reflects electromagnetic waves and which can be measurably deformed as a result of a mechanical stress exerted on said rotating part () The two antennas (A, A) receiving the reflected signals of the sensor () are arranged in the bearing housing () in such a way that they cannot rotate in relation to the sensor and are distanced (&#x3b1;). Said antennas emit receiving signals (a,a) which are sent to an electronic evaluation system () which measures the mechanical stresses of the rotating part () on the basis of both receiving signals (a,a).

Contactless measurement of the stress of rotating parts

A rolling bearing which has as rolling bearing components one bearing race with a first running surface, a second bearing race with a second running surface opposed to the first surface, and rolling elements arranged between the running surfaces. At least one sensing unit is integrated into the rolling bearing components. The sensing unit can be interrogated by radio via antennas or can be connected to an interrogator by a cable. The sensing unit uses at least one component operating on the SAW or BAW principle to sense changes in length and/or changes in temperature in the material of the rolling bearing component and sends the result of the measurement after the arrival of a radio signal via the antenna or via a cable.

Rolling bearing with sensing unit which can be remotely interrogated

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Volkach, Germany

Sven Gempper