Wavelet inversions of elastic wave data for nondestructive evaluation

1994 ◽  
Author(s):  
David M. Patterson ◽  
Brian DeFacio
Keyword(s):  
Elastic Wave ◽  
Nondestructive Evaluation ◽  
Wave Data

Time reversal enabled elastic wave data communications using sensor arrays

2013 ◽  
Vol 134 (5) ◽  
pp. 3980-3980 ◽  
Author(s):  
Yuanwei Jin ◽  
Yujie Ying ◽  
Deshuang Zhao
Keyword(s):  
Elastic Wave ◽  
Time Reversal ◽  
Sensor Arrays ◽  
Data Communications ◽  
Wave Data

scholarly journals Evaluation of Delamination in Concrete by IE Testing Using Multi-Channel Elastic Wave Data

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 201 ◽  
Author(s):  
Seong-Hoon Kee ◽  
Jin-Wook Lee ◽  
Ma. Doreen Candelaria
Keyword(s):  
Data Processing ◽  
Elastic Wave ◽  
Single Channel ◽  
Experimental Studies ◽  
Test Method ◽  
Wave Data ◽  
Wave Measurements ◽  
Propagating Waves ◽  
The Impact ◽  
Wave Modes

The main objectives of this study are to develop a non-destructive test method for evaluating delamination defects in concrete by the Impact-echo test using multi-channel elastic wave data and to verify the validity of the proposed method by experimental studies in the laboratory. First, prototype equipment using an eight-channel linear sensor array was developed to perform elastic wave measurements on the surface of the concrete. In this study, three concrete slab specimens (1500 mm (width) by 1500 mm (length) by 300 mm (thickness)), with simulated delamination defects of various lateral dimensions and depth, were designed and constructed in the laboratory. Multi-channel elastic wave signals measured on the three concrete specimens were converted to the frequency-phase velocity image by using the phase-shift method. A data processing method was proposed to extract the dominant propagating waves and non-propagating waves from the dispersion images. The dominant wave modes were used to evaluate delamination defects in concrete. It was demonstrated that the surface wave velocity values were useful for characterizing the shallow delamination defects in concrete. In addition, the peak frequency of non-propagating wave modes extracted from the dispersion images gives information on the lateral dimensions and depths of the delamination defects. This study also discussed the feasibility of combined use of the results from propagating and non-propagating wave modes to better understand the information on delamination defects in concrete. As will be discussed, the multi-channel elastic wave measurements enable more accurate, consistent, and rapid measurements and data processing for evaluation of delamination defects in concrete than the single-channel sensing method.

scholarly journals Inversion of pack ice elastic wave data to obtain ice physical properties

1998 ◽  
Vol 103 (C10) ◽  
pp. 21783-21793 ◽  
Author(s):  
Peter J. Stein ◽  
Steven E. Euerle ◽  
James C. Parinella
Keyword(s):  
Elastic Wave ◽  
Physical Properties ◽  
Wave Data ◽  
Pack Ice
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