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Proceedings Paper

Wavelet analysis of rock ultrasonic testing signals
Author(s): Xiaochun Zhang; Jing Li
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Paper Abstract

Testing signals in rock based on wavelet transform is analysis, acquiring structure and physics mechanic characteristic of rock. Testing signals is scattered and quantitative analysis. Based on wavelet transform multiresolution analysis, inceptspectrum is acquired. Using relationship between wavelet transform modulus maxima and singular point, it can determine location of signal singular point and singular exponent of singular signal, the signal singular point location can be analyzed, the local singularity is described by Lipschitz index. The results indicate that beneficial information in testing signal is sufficient used. Wavelet transform can analysis the signal elements at certain frequency band and time section, which has good time frequency localization and can seize character of instantaneous changing signals accurately and focus any details of signal for frequency through gradually meticulous sampling step of time field and frequency field. Ultrasonic testing signals of different characteristic rock have inconspicuous distinction, whose wavelet transform has different. These differences are cause of structure, so wavelet transform spectrum reflects rock integrity, for example, joints and cranny of rock. The changing focus character of wavelet transformation is particular in local analysis and singular analysis.

Paper Details

Date Published: 25 August 2009
PDF: 5 pages
Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73755P (25 August 2009); doi: 10.1117/12.839352
Show Author Affiliations
Xiaochun Zhang, North China Institute of Science and Technology (China)
Jing Li, North China Institute of Science and Technology (China)


Published in SPIE Proceedings Vol. 7375:
ICEM 2008: International Conference on Experimental Mechanics 2008

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