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- W2022363766 abstract "Selecting and tuning modes are useful in ultrasonic guided wave non-destructive testing (NDT) since certain modes at various center frequencies are sensitive to specific types of defects. Ideally one should be able to select both the mode and the center frequency of the launched waves. We demonstrated that an affordable laser diode array can selectively launch either the S0 or A0 ultrasonic wave mode at a chosen center frequency into a polymer plate. A fiber-coupled diode array (4 elements) illuminated a 2 mm thick acrylic plate. A predetermined time delay matching the selected mode and frequency was employed between the output of the elements. The generated ultrasound was detected by a 215 kHz piezo receiver. Our results imply that this array permits non-contacting guided wave ultrasonic NDT. The solution is small, affordable, and robust in comparison to conventional pulsed lasers. In addition, it does not require experienced operators." @default.
- W2022363766 created "2016-06-24" @default.
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- W2022363766 date "2013-04-11" @default.
- W2022363766 modified "2023-10-16" @default.
- W2022363766 title "Phase-delayed laser diode array allows ultrasonic guided wave mode selection and tuning" @default.
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- W2022363766 doi "https://doi.org/10.1063/1.4801394" @default.
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