Smart Structures and Systems

  • 제19권5호
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  • Pages.513-521
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  • 2017
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Application of wavelet transform for the impulse response of pile

  • Ni, Sheng-Huoo (Department of Civil Engineering, National Cheng Kung University) ;
  • Yang, Yu-Zhang (Department of Civil Engineering, National Cheng Kung University) ;
  • Lyu, Chia-Rong (Department of Civil Engineering, National Cheng Kung University)
  • 투고 : 2014.06.10
  • 심사 : 2017.03.22
  • 발행 : 2017.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

The purpose of this paper is to study the capabilities of the impulse response method in length and flaw detecting for concrete piles and provide a suggested method to find small-size flaws in piles. In this work, wavelet transform is used to decompose the recorded time domain signal into a series of levels. These levels are narrowband, so the mix of different dominant bandwidths can be avoided. In this study, the impulse response method is used to analyze the signal obtained from the wavelet transform to improve the judgment of the flaw signal so as to detect the flaw location. This study provides a new way of thinking in non-destructive testing detection. The results show that the length of a pile is easy to be detected in the traditional reflection time or frequency domain method. However, the small flaws within pile are difficult to be found using these methods. The proposed approach in this paper is able to greatly improve the results of small-size flaw detection within piles by reducing the effects of any noise and clarifying the signal in the frequency domains.

키워드

과제정보

연구 과제 주관 기관 : Natural Science Council of Republic of China

참고문헌

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피인용 문헌

  1. Damage Localization of Piles Based on Complex Continuous Wavelet Transform: Numerical Example and Experimental Verification vol.2020, pp.None, 2017, https://doi.org/10.1155/2020/8058640