Flaw detection of wellbore systems by combining time reversal methods and nonlinear acoustic measurements

2017 ◽  
Vol 142 (4) ◽  
pp. 2724-2724
Author(s):  
Carly M. Donahue ◽  
Pierre-yves Le Bas
Keyword(s):  
Time Reversal ◽  
Flaw Detection ◽  
Acoustic Measurements ◽  
Nonlinear Acoustic

Nonlinear acoustic time reversal imaging using the scaling subtraction method

2008 ◽  
Vol 41 (21) ◽  
pp. 215404 ◽  
Author(s):  
M Scalerandi ◽  
A S Gliozzi ◽  
C L E Bruno ◽  
K Van Den Abeele
Keyword(s):  
Time Reversal ◽  
Subtraction Method ◽  
Nonlinear Acoustic

scholarly journals Time-Reversal Analogy by Nonlinear Acoustic–Gravity Wave Triad Resonance

Fluids ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 91 ◽  
Author(s):  
Usama Kadri
Keyword(s):  
Wave Packet ◽  
Gravity Wave ◽  
Time Reversal ◽  
Sudden Change ◽  
Wave Theory ◽  
Acoustic Mode ◽  
Acoustic Gravity Wave ◽  
Surface Gravity Wave ◽  
Energy Pumping ◽  
Nonlinear Acoustic

Time reversal of free-surface water (gravity) waves due to a sudden change in the effective gravity has been extensively studied in recent years. Here, we show that an analogy to time-reversal can be obtained using nonlinear acoustic-gravity wave theory. More specifically, we present a mathematical model for the evolution of a time-reversed gravity wave packet from a nonlinear resonant triad perspective. We show that the sudden appearance of an acoustic mode in analogy to a sudden vertical oscillation of the liquid film, can resonate effectively with the original gravity wave packet causing energy pumping into an oppositely propagating (time-reversed) surface gravity wave of an almost identical shape.

Water Tunnel Acoustic Measurements Using a Time Reversal Mirror

2001 ◽  
Author(s):  
Christopher Barber ◽  
Gerald C. Lauchle ◽  
Dean E. Capone
Keyword(s):  
Time Reversal ◽  
Measurement Techniques ◽  
Processing System ◽  
Acoustic Energy ◽  
Water Tunnel ◽  
Water Tank ◽  
State University ◽  
Acoustic Measurements ◽  
Time Reversal Mirror ◽  
Data Acquisition And Processing

Abstract Acoustic time reversal is a process in which acoustic energy received at an array is recorded, time-reversed, and then rebroadcast through the same or a collocated array. The result is that the original signal is “retrofocused” in time and space to the original source location without regard to the propagation paths or characteristics of the complex media between source and receiver. The array used for receive and rebroadcast, together with the data acquisition and processing system, is referred to as a time reversal mirror (TRM). Adaptation of time reversal mirrors to the problem of water tunnel acoustic measurements is examined. A concept demonstration test is planned for the Garfield Thomas Water Tunnel (GTWT) at the Pennsylvania State University Applied Research Laboratory, with the objective of demonstrating improved acoustic measurement capabilities compared to other conventional measurement techniques. An outline of the planned test is presented, as well as results from preliminary water tank testing of the arrays and instrumentation to be used in the GTWT experiment. A mathematical description of the time reversal mirror is developed, and preliminary conclusions regarding expected TRM performance in the water tunnel environment and limitations of the proposed measurement scheme are discussed.

Nonlinear acoustic measurements ahead of a notch during fatigue

2013 ◽  
Author(s):  
R. W. Martin ◽  
R. D. Mooers ◽  
A. L. Hutson ◽  
S. Sathish ◽  
M. P. Blodgett
Keyword(s):  
Acoustic Measurements ◽  
Nonlinear Acoustic

Nonlinear acoustic modulation technique for nondestructive flaw detection

1997 ◽  
Vol 101 (5) ◽  
pp. 3029-3030 ◽  
Author(s):  
J. P. Kim ◽  
E. J. Kim ◽  
S. W. Yoon ◽  
A. Sutin
Keyword(s):  
Flaw Detection ◽  
Modulation Technique ◽  
Nonlinear Acoustic ◽  
Acoustic Modulation
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