Measurement of 2D vibration modes using amplification of high speed video in the presence of noise
H. Hopper, D. Zheng, R. Faventi, S. R. Voisey
Abstract
The amplification of video allows sub-pixel movement to be revealed. This has been applied to measure structural vibration using high speed video. A perspective correction has been defined to allow 2D modal analysis to be conducted on a flat plate showing that accurate displacement measurements across the surface can be made. Furthermore, the effect of using various excitation signals including white noise and swept sine has demonstrated that it is possible to extract several mode shapes in a single measurement. Finally, measurements have been conducted on a Dyson Airblade V hand-drier in operation showing that high speed video measurement of vibration can be applied to industrial noise control problems. The main advantage of this method is ease of testing compared to traditional single point accelerometers and measurement of time variant signals compared to a scanning laser vibrometer.
BibTeX
@inproceedings{icassp2017_measurementof2dv,
title = {Measurement of 2D vibration modes using amplification of high speed video in the presence of noise},
author = {H. Hopper and D. Zheng and R. Faventi and S. R. Voisey},
booktitle = {ICASSP 2017},
year = {2017}
}