@inproceedings{73c64aadbbf04cb48f01bd029fb11fa9,
title = "Assessment of coating layers on the accuracy of displacement measurement in laser Doppler vibrometry",
abstract = "The Laser Doppler Vibrometer (LDV) is known to be a useful tool for measuring vibration and wave propagation for non-destructive testing (NDT). Although LDV systems have many advantages, most notably that they provide non-contact measurements, they often require surface enhancement such as reflective tape to improve the signal-to-noise ratio. While accurate for low frequencies, measured displacements from tape can be significantly different from the displacement of the substrate once the frequency exceeds a threshold value. In this study, different tapes are mounted on the surface of an aluminum block, and out-of-plane displacements are recorded for frequencies from 1 to 5 MHz. In addition, dynamic finite element modeling is conducted, where the effect of reflective tapes on measured displacements on the surface of the tape is evaluated. Results of the finite element simulations reveal that the effective stiffness and mass of the tape can contribute significantly to errors in data acquisition during experiments. As evident in the results, the discrepancy between the measured displacements at the top and the bottom of the tape is considerable at some frequencies. The wave propagation simulation also provides improved understanding of the experimental results.",
author = "Mostafa Hasanian and Lissenden, {Cliff J.}",
year = "2017",
month = feb,
day = "16",
doi = "10.1063/1.4974600",
language = "English (US)",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Bond, {Leonard J.} and Chimenti, {Dale E.}",
booktitle = "43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 36",
note = "43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2016 ; Conference date: 17-07-2016 Through 22-07-2016",
}