Defect imaging using time-reversal technique

S. T. Liu; L. Liu; F. G. Yuan

doi:10.1117/12.879892

13 April 2011 Defect imaging using time-reversal technique

S. T. Liu, L. Liu, F. G. Yuan

Proceedings Volume 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011; 79811R (2011) https://doi.org/10.1117/12.879892
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

A defect detection technique based on time-reversal concept is proposed to detect and locate the defects in a plate structure. Time-reversal imaging method is widely use as an advanced, robust data processing and imaging technique in structure health monitoring to detect the defects. Physically, the time reversed signal will retrace its original path precisely, which means that the signals will be refocused back on the source and defects after we record, time reverse and back propagate the wave signal experimentally or numerically. In this paper, a distributed actuator/sensor network is placed on a square homogeneous plate to generate and collect the wave signals in the plate. The time-reversal technique is then used to interpret the physical meaning of the recorded data and image the defects in the plate. Computer simulations are presented to illustrate the feasibility of the technique in this paper.

Citation Download Citation

S. T. Liu, L. Liu, and F. G. Yuan "Defect imaging using time-reversal technique", Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79811R (13 April 2011); https://doi.org/10.1117/12.879892

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