Two-dimensional virtual array for ultrasonic nondestructive evaluation using a time-reversal chaotic cavity

2011 ◽  
Vol 130 (5) ◽  
pp. 2720-2727 ◽  
Author(s):  
Youngsoo Choi ◽  
Hunki Lee ◽  
Hyun Hong ◽  
Won-Suk Ohm
Keyword(s):  
Nondestructive Evaluation ◽  
Time Reversal ◽  
Two Dimensional ◽  
Ultrasonic Nondestructive Evaluation ◽  
Virtual Array

Enhancement of Flaw Detectability Using Time Reversal Techniques

2007 ◽  
Vol 120 ◽  
pp. 113-118
Author(s):  
Hak Joon Kim ◽  
R. Bruce Thompson ◽  
Sung Jin Song
Keyword(s):  
Nondestructive Evaluation ◽  
Time Reversal ◽  
Phased Array ◽  
Experimental Studies ◽  
Inhomogeneous Media ◽  
Ultrasonic Nondestructive Evaluation ◽  
Ultrasonic Phased Array

Ultrasonic phased array inspection has been paid a great attention in ultrasonic nondestructive evaluation since it can provide a benefit of focusing and/or steering ultrasonic beams. A time reversal technique is claimed to be very robust to focus beams through inhomogeneous media, using the phased array transducers. In this paper, the performance and limitations of a D.O.R.T. method, which is one of the time reversal techniques, is considered based on the experimental studies. In addition, a variation of the D.O.R.T, namely a pre-focused D.O.R.T., is proposed in order to overcome the limitations of the current D.O.R.T. method. The results of the newly proposed method are compared to those obtained by conventional focusing methods.

scholarly journals Model-Based Iterative Reconstruction for One-Sided Ultrasonic Nondestructive Evaluation

2019 ◽  
Vol 5 (1) ◽  
pp. 150-164
Author(s):  
Hani Almansouri ◽  
Singanallur Venkatakrishnan ◽  
Charles Bouman ◽  
Hector Santos-Villalobos
Keyword(s):  
Nondestructive Evaluation ◽  
Iterative Reconstruction ◽  
Ultrasonic Nondestructive Evaluation ◽  
Model Based
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