INVESTIGATION OF ULTRASONIC BEAM FOCUSING EFFECTS FOR INHOMOGENEOUS MEDIA USING THE TIME REVERSAL METHOD

2009 ◽  
Author(s):  
H. Jeong ◽  
J.-S. Lee ◽  
Y.-H. Jeong ◽  
S.-M. Bae ◽  
C. H. Lee ◽  
...  
Keyword(s):  
Time Reversal ◽  
Inhomogeneous Media ◽  
Ultrasonic Beam ◽  
Beam Focusing

Ultrasonic beam focusing for steam flowrate measurement in high temperature metal pipe

2016 ◽  
Vol 2016.21 (0) ◽  
pp. D132 ◽  
Author(s):  
Keisuke TSUKADA ◽  
Taiki AIBA ◽  
Tatsuya KAWAGUCHI ◽  
Hiroshige KIKURA ◽  
Katsuhiko SUGITA ◽  
...  
Keyword(s):  
High Temperature ◽  
Ultrasonic Beam ◽  
Beam Focusing ◽  
Metal Pipe ◽  
Steam Flowrate

The Clinical Impact of Ultrasonic Beam Focusing Patterns

Radiology ◽  
1979 ◽  
Vol 131 (2) ◽  
pp. 469-472 ◽  
Author(s):  
C. Carl Jaffe ◽  
Kenneth J. W. Taylor
Keyword(s):  
Clinical Impact ◽  
Ultrasonic Beam ◽  
Beam Focusing

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.

TIME REVERSAL BEAM FOCUSING OF ULTRASONIC ARRAY TRANSDUCER ON A DEFECT IN A TWO LAYER MEDIUM

2010 ◽  
Author(s):  
Hyunjo Jeong ◽  
Jeong-Sik Lee ◽  
Chung-Hoon Lee ◽  
Donald O. Thompson ◽  
Dale E. Chimenti
Keyword(s):  
Time Reversal ◽  
Beam Focusing ◽  
Array Transducer ◽  
Ultrasonic Array ◽  
Layer Medium
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