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Sensors 2014, 14(11), 20439-20450; doi:10.3390/s141120439

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

College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
Department of Mechanical Engineering, Chiba University, Chiba 263-8522, Japan
JAL Engineering Co. Ltd., Haneda Airport Ota, Tokyo 144-0041, Japan
Japan Aerospace Exploration Agency, Osawa Mitaka, Tokyo 181-0015, Japan
Author to whom correspondence should be addressed.
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)
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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

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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