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Open AccessArticle

An Efficient Algorithm Embedded in an Ultrasonic Visualization Technique for Damage Inspection Using the AE Sensor Excitation Method

1
College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
2
Department of Mechanical Engineering, Chiba University, Chiba 263-8522, Japan
3
JAL Engineering Co. Ltd., Haneda Airport Ota, Tokyo 144-0041, Japan
4
Japan Aerospace Exploration Agency, Osawa Mitaka, Tokyo 181-0015, Japan
*
Author to whom correspondence should be addressed.
Sensors 2014, 14(11), 20439-20450; https://doi.org/10.3390/s141120439
Received: 5 September 2014 / Revised: 17 October 2014 / Accepted: 23 October 2014 / Published: 29 October 2014
(This article belongs to the Special Issue Acoustic Waveguide Sensors)
To improve the reliability of a Lamb wave visualization technique and to obtain more information about structural damages (e.g., size and shape), we put forward a new signal processing algorithm to identify damage more clearly in an inspection region. Since the kinetic energy of material particles in a damaged area would suddenly change when ultrasonic waves encounter the damage, the new algorithm embedded in the wave visualization technique is aimed at monitoring the kinetic energy variations of all points in an inspection region to construct a damage diagnostic image. To validate the new algorithm, three kinds of surface damages on the center of aluminum plates, including two non-penetrative slits with different depths and a circular dent, were experimentally inspected. From the experimental results, it can be found that the new algorithm can remarkably enhance the quality of the diagnostic image, especially for some minor defects. View Full-Text
Keywords: visualization technique; Lamb waves; kinetic energy; diagnostic image visualization technique; Lamb waves; kinetic energy; diagnostic image
MDPI and ACS Style

Liu, Y.; Goda, R.; Samata, K.; Kanda, A.; Hu, N.; Zhang, J.; Ning, H.; Wu, L. An Efficient Algorithm Embedded in an Ultrasonic Visualization Technique for Damage Inspection Using the AE Sensor Excitation Method. Sensors 2014, 14, 20439-20450.

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