Application of Wavelet Analysis for the Impulse Response of Pile
碩士 === 國立成功大學 === 土木工程學系碩博士班 === 100 === In this study, sonic echo (SE) method and impulse response (IR) method are used to detect six different preset defects of the piles, and to determine the flaws and the length of the pile. Discrete wavelet transform (DWT) is used to separate the bottom and...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/65524794072995322813 |
| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 100 === In this study, sonic echo (SE) method and impulse response (IR) method are used to detect six different preset defects of the piles, and to determine the flaws and the length of the pile. Discrete wavelet transform (DWT) is used to separate the bottom and the flaw frequency signal of pile. This will be helpful to tell the flaws signals more clearly. The signal obtained from the SE and IR method are analyzed. Also, the effect of defect positions on the signal are discussed in this study.
The results show that the SE or IR methods can accurately determine the length of the pile, but the signal from the defects is not easy to interpret. However, DWT is effective to tell the defect signal on the frequency figure and highlight the defect signal.
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