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Erschienen in:
2012 | OriginalPaper | Buchkapitel
The Characteristic of the Acoustic Emission Signal in Rotating Shaft with Crack
verfasst von : Dongsik Gu, Jaegu Kim, Won Cheol Kim, Byeong-Keun Choi
Erschienen in: Engineering Asset Management and Infrastructure Sustainability
Verlag: Springer London
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Abstract
Condition monitoring (CM) is a method based on Non-destructive test (NDT). So, recently many kinds of NDT were applied for CM. And acoustic Emission (AE) is widely used for the early detection of faults in rotating machinery in these days also. Because its sensitivity is higher than normal accelerometers, and it can detect low energy vibration signals. And crack is considered one of severe fault in the rotating machine. In this paper, therefore, early detection has done by AE about the shaft of low-speed rotating machine. There is a seeded initial crack on the shaft; the AE signal had been measured with low speed rotation and application of load-condition. And the signal of crack in rotating machine was detected by the AE transducer, then the trend of crack growth had found out by using some of the feature values such as the peak value, skewness, kurtosis, crest factor, frequency center value (FC), variance frequency value (VF) and so on that are used in the mechanical vibration field.