Damage detection of machinery is always a research field that attracts attentions of many people. In this paper, a novel technique for gearbox damage detection is investigated, which is a wavelet-based singularity analysis method. Wavelet transform is applied to vibration signal, modulus maxima lines are extracted, and conclusions are made based on these lines. Simulated and real vibration data have been analyzed using this approach. The results are presented to show the effectiveness of the method.

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