Title :
Optimum excitation of the Lamb wave modes in NDE
Author :
Li, Songsong ; Guo, Xianjiu ; Chen, Xiaoming
Author_Institution :
Inf. Eng. Inst., Dalian Ocean Univ., Dalian, China
Abstract :
This paper presents a study of the use of EMAT (Electromagnetic Acoustic Transducer) to generate and detect the single Lamb wave in the different thickness steel plate. Using an EMAT with a given wavelength, the desired single Lamb wave mode are generated and detected by controlling the center frequency of narrowband signals, and the center frequency of waves is about from 0.18MHz to 1MHz. The experimental work was performed on the steel plate of different thickness, and the results indicated this EMAT configuration for excitation of the single Lamb wave is valid.
Keywords :
electromagnetic devices; plates (structures); steel; surface acoustic wave transducers; surface acoustic waves; ultrasonic materials testing; FeCJk; Lamb wave modes; electromagnetic acoustic transducer; frequency 0.18 MHz to 1 MHz; narrowband signals; nondestructive testing; optimum excitation; steel plate; Band pass filters; Fingers; Silicon; EMAT and Nondestractive testing; Lamb wave;
Conference_Titel :
Computer, Mechatronics, Control and Electronic Engineering (CMCE), 2010 International Conference on
Conference_Location :
Changchun
Print_ISBN :
978-1-4244-7957-3
DOI :
10.1109/CMCE.2010.5609828
