Pile integrity testing signal analyses with one dimensional continuous wavelet transform

Sheng-Huoo Ni, Kuo Feng Lo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Non-destructive testing methods (NDT) gain its popularity while used to evaluate the integrity of underground structure due to its economic an fast testing advantage. However, the transit signals acquired from sensor will tend to be complicated as the defects exist. To identify the defects from complex signal becomes so difficult that a misjudgment may be occurred. Recently, the wavelet transform technique has been applied to a wide variety of signal analyses. This paper applies the continuous wavelet transform method (CWT) to enhance the characteristics of the tremors, in order for a better identification. The results show that the CWT is more suitable for problems while a more precise time resolution is required for higher frequencies than for the lower ones. This makes the CWT better for the locating of discontinuities or singularities which ever the high frequency terms dominate. The wavelet transform effectively zooms in on the temporal signal whenever analyzing higher frequencies so giving a greater resolution which we want to realize. It also prove that the CWT indeed a suitable way to help explication and judgment the results from Sonic Echo (SE) method easily and precisely.

Original languageEnglish
Title of host publicationProceedings of The Sixteenth 2006 International Offshore and Polar Engineering Conference, ISOPE 2006
Pages510-515
Number of pages6
Publication statusPublished - 2006 Dec 1
Event16th 2006 International Offshore and Polar Engineering Conference, ISOPE 2006 - San Francisco, CA, United States
Duration: 2006 May 282006 Jun 2

Other

Other16th 2006 International Offshore and Polar Engineering Conference, ISOPE 2006
CountryUnited States
CitySan Francisco, CA
Period06-05-2806-06-02

All Science Journal Classification (ASJC) codes

  • Ocean Engineering

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  • Cite this

    Ni, S-H., & Lo, K. F. (2006). Pile integrity testing signal analyses with one dimensional continuous wavelet transform. In Proceedings of The Sixteenth 2006 International Offshore and Polar Engineering Conference, ISOPE 2006 (pp. 510-515)