Abstract
Extracting acoustic emission (AE) signals of cracks and micro-cracks after material yield phase from noise is of great significance for the study of AE character of material 2.25Cr-1Mo. In this paper wavelet was used to find out the main frequency bands of the burst cracking AE signals from the tensile test of material 2.25Cr-1Mo. Burst cracking waveform was successfully extracted from mixed waveform by reconstructing wavelet coefficients with the main frequency bands. Then the new descriptors of the waveform were determined by using of a 30% floating threshold. The DBSCAN clustering was applied to separate noise signals of electric and vibration successfully. At last the k-mean clustering was used to separate burst cracking signal data from data set effectively and accurately. According to the Analysis of the material of 2.25Cr-1Mo tensile test, the cumulative energy of burst AE signals could reflect the yield point and the degree of material damage.
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© 2012 Springer-Verlag GmbH Berlin Heidelberg
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Long, F., Xu, H. (2012). Research on Signal Analysis Method of Acoustic Emission of Material 2.25Cr-1Mo Based on Wavelet Filter and Clustering. In: Qian, Z., Cao, L., Su, W., Wang, T., Yang, H. (eds) Recent Advances in Computer Science and Information Engineering. Lecture Notes in Electrical Engineering, vol 126. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25766-7_109
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DOI: https://doi.org/10.1007/978-3-642-25766-7_109
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