Research on 2D imaging technique for concrete cross section |
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| Authors: | LI Qiufeng SHI Lihua LIANG Dakai |
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| Institution: | LI Qiufeng~(1,3) SHI Lihua~2 LIANG Dakai~3 (1 Key Laboratory of Nondestructive Test of Ministry of Education,Nanchang Hangkong Univ.330063) (2 Engineering Institute of Corps of Engineers,PLA University of Sci., Tech.Nanjing 210007) (3 College of Aerospace Engineering,Nanjing University of Aeronautics , Astronautics Nanjing 210016) |
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| Abstract: | Two signal processing approaches are presented to improve imaging resolution in ultrasonic NDT of concrete structures.When low-frequency B-scan data are processed by Synthetic Aperture Focusing Technique(SAFT),wavepacket will be further elongated because low-frequency detection signal covers a relative long period.Wavepacket Decomposition Technique (WDT) is introduced here to solve this problem.This method uses a few parameters to describe the original signal so that it can avoid the processing of the whole... |
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