The Pre-Processing of Ultrasonic Array Data for Time-Reversal-Based Imaging Algorithm

2017 ◽  
Author(s):  
Chengguang Fan ◽  
Lei Yang ◽  
Yong Zhao
Keyword(s):  
Time Reversal ◽  
Array Data ◽  
Imaging Algorithm ◽  
Ultrasonic Array

REVERSIBLE BACK-PROPAGATION IMAGING ALGORITHM FOR POST-PROCESSING OF ULTRASONIC ARRAY DATA

2009 ◽  
Author(s):  
A. Velichko ◽  
P. D. Wilcox ◽  
Donald O. Thompson ◽  
Dale E. Chimenti
Keyword(s):  
Back Propagation ◽  
Post Processing ◽  
Array Data ◽  
Imaging Algorithm ◽  
Ultrasonic Array

IMAGING OF DEFECTS IN SEVERAL COMPLEX CONFIGURATIONS BY SIMULATION-HELPED PROCESSING OF ULTRASONIC ARRAY DATA

2010 ◽  
Author(s):  
A. Fidahoussen ◽  
P. Calmon ◽  
M. Lambert ◽  
S. Paillard ◽  
S. Chatillon ◽  
...  
Keyword(s):  
Array Data ◽  
Ultrasonic Array

Baseline-free Damage Imaging Algorithm using Spatial Frequency Domain Virtual Time Reversal

2021 ◽  
pp. 1-1
Author(s):  
Bruno Albuquerque Castro ◽  
Fabricio Guimaraes Baptista ◽  
Jorge Alfredo Ardila ◽  
Francesco Ciampa
Keyword(s):  
Spatial Frequency ◽  
Frequency Domain ◽  
Time Reversal ◽  
Imaging Algorithm ◽  
Damage Imaging ◽  
Virtual Time ◽  
Spatial Frequency Domain

scholarly journals Methodologies for validating ray-based forward model using finite element method in ultrasonic array data simulation

2018 ◽  
Author(s):  
Jie Zhang ◽  
Andrew Nixon ◽  
Tom Barber ◽  
Nicolas Budyn ◽  
Rhodri Bevan ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Forward Model ◽  
Data Simulation ◽  
Array Data ◽  
Ultrasonic Array ◽  
Element Method

scholarly journals Damage Detection of Closed Crack in a Metallic Plate Using Nonlinear Ultrasonic Time Reversal Method

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Wang Zhang ◽  
Weiliang Wu ◽  
Xiaoyi Sun ◽  
Li Xiao ◽  
Wenzhong Qu
Keyword(s):  
Time Reversal ◽  
Damage Index ◽  
Ultrasonic Waves ◽  
Closed Crack ◽  
Time Reversibility ◽  
Imaging Algorithm ◽  
Reconstructed Signal ◽  
Ultrasonic Time ◽  
Nonlinear Ultrasonic ◽  
Nonlinear Components

Initial cracks in metallic structures incline to be closed at rest. Such incipient damage generally fails to be detected and located with traditional linear ultrasonic techniques because ultrasonic waves penetrate the contact area of the closed crack. In this paper, an imaging algorithm based on nonlinear ultrasonic time reversal method is proposed to detect closed cracks in aluminum plates. Two surface-bonded piezoelectric transducer arrays are used to generate, receive, and reemit ultrasonic wave signals. The closed crack is simulated by tightening a bolt on the aluminum plate. By applying large amplitude excitation voltage on the PZT transducers, the closed crack could be opened and closed. The transmitted waves recorded by PZT array contain nonlinear components, the signals are time reversed and emitted back, and the tone burst reconstructions are achieved. The linear reciprocity and the time reversibility break down due to the presence of the nonlinear components. The correlation coefficient between the original excitation signal and the reconstructed signal is calculated to define the damage index for individual sensing path and is used to develop an imaging algorithm to locate the closed crack on the plate. The experimental results demonstrate that incident wave signals and their reconstructed signals can be used to accurately detect and locate closed cracks.

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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