Next Article in Journal
Consensus-Based Cooperative Control Based on Pollution Sensing and Traffic Information for Urban Traffic Networks
Next Article in Special Issue
Structural Analysis of Polymer Composites Using Spectral Domain Optical Coherence Tomography
Previous Article in Journal
Spectroscopic Detection of Glyphosate in Water Assisted by Laser-Ablated Silver Nanoparticles
Previous Article in Special Issue
Simulation Study of the Localization of a Near-Surface Crack Using an Air-Coupled Ultrasonic Sensor Array
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(5), 955;

A Modified Lamb Wave Time-Reversal Method for Health Monitoring of Composite Structures

School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Author to whom correspondence should be addressed.
Academic Editors: M. H. Ferri Aliabadi and Zahra Sharif Khodaei
Received: 10 March 2017 / Revised: 17 April 2017 / Accepted: 23 April 2017 / Published: 26 April 2017
(This article belongs to the Special Issue Sensor Technologies for Health Monitoring of Composite Structures)
Full-Text   |   PDF [4390 KB, uploaded 26 April 2017]   |  


Because the time reversal operator of Lamb waves varies with frequency in composite structures, the reconstructed signal deviates from the input signal even in undamaged cases. The damage index captures the discrepancy between the two signals without differentiating the effects of time reversal operator from those of damage. This results in the risk of false alarm. To solve this issue, a modified time reversal method (MTRM) is proposed. In this method, the frequency dependence of the time reversal operator is compensated by two steps. First, an amplitude modulation is placed on the input signal, which is related to the excitability, detectability, and attenuation of the Lamb wave mode. Second, the damage index is redefined to measure the deviation between the reconstructed signal and the modulated input signal. This could indicate the presence of damage with better performance. An experimental investigation is then conducted on a carbon fiber-reinforced polymer (CFRP) laminate to illustrate the effectiveness of the MTRM for identifying damage. The results show that the MTRM may provide a promising tool for health monitoring of composite structures. View Full-Text
Keywords: Lamb wave; time reversal; structural health monitoring; composite structures Lamb wave; time reversal; structural health monitoring; composite structures

Figure 1

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).

Share & Cite This Article

MDPI and ACS Style

Zeng, L.; Lin, J.; Huang, L. A Modified Lamb Wave Time-Reversal Method for Health Monitoring of Composite Structures. Sensors 2017, 17, 955.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top