Signal Enhancement of Ultrasonic Guided Waves Using Time Reversal Technique
Signal enhancement of ultrasonic guided waves is studied using time reversal technique. The defect in pipe is detected by activating single mode guided waves L(0,2) at the center frequency of 70 kHz. Time-reversal technique is used to further enhance the defect detection capability. A method to identify the defect is described on a finite element model. Numerical results show that the time reversal technique has the ability to evidently enhance the amplitude of damage reflected wave and improve the detection efficiency of defect.
Helen Zhang and David Jin
H. Y. Zhang et al., "Signal Enhancement of Ultrasonic Guided Waves Using Time Reversal Technique", Advanced Materials Research, Vols. 282-283, pp. 589-592, 2011