Abstract Lamb wave damage imaging is one of the hot spots for structural health monitoring (SHM), as for the structural damage location like plate, this paper proposes an ellipse positioning method based on signal magnitude. By this method for the intersection of more groups of elliptical trajectories through defects, the intersection point is the defect; and defect signal amplitude is larger, the higher the image pixels. Through the arrangement of sensor network on Al plate, excite and receive Lamb wave. And the difference between the damage signal and reference signal is damage-scattered signal. Then to solve the envelope of signal with Hilbert transforms which can be used to locate the damage. Experimental results show that, error of the defects positioning algorithm in aluminum plate is small, imaging result is intuitive and clear. And the experimental data verified the effectiveness of the algorithm.
Research of Damage Imaging Algorithm in Plate Based on Signal Magnitude
2014-01-01
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Research of Damage Imaging Algorithm in Plate Based on Signal Magnitude
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