Evaluation of pile defects using complex continuous wavelet transform analysis

Sheng Huoo Ni, Yu Zhang Yang, Pei Hsun Tsai, Wei Hsiang Chou

研究成果: Article同行評審

25 引文 斯高帕斯(Scopus)


In recent years, the technique of wavelet transform has been applied widely in signal processing in different fields, including non-destructive testing of pile foundations. However, it was used mostly in signal filtering and the analysis of time-frequency diagram. This paper successfully utilized complex continuous wavelet transform to determine pile length and locations of defects on pile foundations by analyzing the time-frequency-phase angle diagram in different frequency band. Six piles with different types of defects were installed and tested to verify the proposed approach in this study. The results shows that complex continuous wavelet transform not only is able to provide high resolution results in different frequency bands, which is similar to that of continuous wavelet transform, but also simplifies the identification of the reflection of defects using 3D phase spectrogram. The location of defects can then be easily determined using phase diagram under the corresponding specific frequency.

頁(從 - 到)50-59
期刊NDT and E International
出版狀態Published - 2017 4月 1

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 機械工業


深入研究「Evaluation of pile defects using complex continuous wavelet transform analysis」主題。共同形成了獨特的指紋。