Method and Arrangement for Determining and Monitoring the State of a Rolling Bearing
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Accused Products
Abstract
An arrangement and method for determining and monitoring the state of a rolling bearing, wherein a first sensor signal is captured in the form of a sound emission signal in a first frequency band in the ultrasonic range during operation of the rolling bearing, a second sensor signal is captured in a second frequency band of lower frequency in the ultrasonic range, a first characteristic value for recently occurred damage is determined from the shape of the first sensor signal, a second characteristic value for recently occurred damage is determined from the shape of the second sensor signal, and the state of the rolling bearing is determined by comparing the first characteristic value to a reference value dependent on the speed of the rolling bearing and dependent on the second characteristic value to at least one second reference value dependent on the speed of the rolling bearing.
13 Citations
48 Claims
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1-23. -23. (canceled)
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24. A method for determining and monitoring a state of a rolling bearing during operation of the rolling bearing, the method comprising:
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capturing a first sensor signal comprising an acoustic emission signal in a first frequency band in an ultrasonic range; capturing a second sensor signal in a second frequency band at a lower frequency in the ultrasonic range; determining at least one first characteristic value for ongoing damage to the rolling bearing from a signal shape of the first sensor signal; determining at least one second characteristic value for damage that has already occurred to the rolling bearing from a signal shape of the second sensor signal; and comparing the at least one first characteristic value with at least one first reference value dependent on a speed of the rolling bearing and comprising the at least one second characteristic value with at least one second reference value dependent on the speed of the rolling bearing to determine the state of the rolling bearing; wherein, for a steel rolling bearing, the first sensor signal is captured at a resonant frequency of between 100 kHz and 120 kHz and the second sensor signal is captured at a second resonant frequency in a frequency range of between 25 kHz and 50 kHz. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An arrangement for determining and monitoring a state of a rolling bearing during operation, comprising:
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a first sensor device for capturing a first sensor signal comprising an acoustic emission signal in a first frequency band in the ultrasonic range, the first sensor device being configured to capture the first sensor signal at a first resonant frequency between 100 kHz and 120 kHz to determine the state of a steel rolling bearing; a second sensor device for capturing a second sensor signal in a second frequency band of lower frequency in a frequency range between 25 kHz and 50 kHz; a first signal processing device for determining, from a signal shape of the first sensor signal, at least one first characteristic value for ongoing damage to the rolling bearing; a second signal processing device for determining, from a signal shape of the second sensor signal, at least one second characteristic value for damage that has already occurred to the rolling bearing; and an evaluation device for determining the state of the rolling bearing by comparing the at least one first characteristic value with at least one reference value dependent on the speed of the rolling bearing and comprising the at least one second characteristic value to at least one second reference value dependent on a speed of the rolling bearing. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification