Article Article
Signal Event Extraction by the Apex-shifted Radon Transform

Complex structures, such as composite laminates with irregular shapes or with structural reinforcements, pose unique challenges for ultrasonic inspection. These material and geometric complexities interact with the ultrasonic waves and can bury damage-scattered waves in the time-space domain. An Apex-shifted Radon Transform is proposed in this research to convert these signals to an apex time-curvature-apex offset domain (τ − q − y). Through this process, the energy of damage-scattered events can be compressed to localized regions at their apex location for easy extraction. This method shows potential in complex signal extraction and is promising as a tool for damage detection in complex structures without using baseline subtraction.

DOI: 10.32548/RS.2022.043


(1) Dawson, Alexander J, Michaels, Jennifer E and Michaels, Thomas E. “Isolation of ultrasonic scattering by wavefield baseline subtraction.” Mechanical Systems and Signal Processing Vol. 70 (2016): pp. 891–903.

(2) Almansouri, Hani, Venkatakrishnan, Singanallur, Bouman, Charles and Santos-Villalobos, Hector. “Model-based iterative reconstruction for one-sided ultrasonic nondestructive evaluation.” IEEE Transactions on Computational Imaging Vol. 5 No. 1 (2018): pp. 150–164.

(3) He, Jiaze, Leser, Patrick E, Leser, William P and Yuan, Fuh-Gwo. “IWSHM 2017: damage-scattered wave extraction in an integral stiffened isotropic plate: a baseline-subtraction-free approach.” Structural Health Monitoring (2018): p. 1475921718769232.

(4) Trad, Daniel, Siliqi, Risto, Poole, Gordon and Boelle, Jean-Luc. “Fast and robust deblending using apex shifted Radon transform.” SEG Technical Program Expanded Abstracts 2012. Society of Exploration Geophysicists (2012): pp. 1–5.

Usage Shares
Total Views
58 Page Views
Total Shares
0 Tweets
0 PDF Downloads
0 Facebook Shares
Total Usage