Analysis of Barkhausen noise using wavelet-based fractal signal processing for fatigue crack detection

作者：Miesowicz Krzysztof; Staszewski Wieslaw J^*; Korbiel Tomasz

来源：International Journal of Fatigue, 2016, 83: 109-116.

DOI：10.1016/j.ijfatigue.2015.10.002

• Fatigue crack detection
• Crack initiation
• Barkhausen noise
• Fractal signal processing
• Wavelets

The paper presents new approach to Barkhausen noise signal processing for detection of fatigue crack. Barkhausen noise signal from mild steel samples under axial fatigue is investigated using fractal signal processing, particularly wavelet variance method. Based on repeatability analysis new algorithm is developed and applied to acquired signals. The influence of fatigue on fractal characteristics of Barkhausen noise is analyzed. Signal analysis reveals significant and repeatable changes in wavelet variance, spectral parameter and estimated Hurst exponent just after crack initiation. The results demonstrate high potential of fractal analysis of Surface Barkhausen noise applied to fatigue crack initiation detection.

• 出版日期2016-2