WIT Press


Accuracy Evaluation Of A Laser Interferometry Measurement System In Long Distance Dynamic Measurements

Price

Free (open access)

Paper DOI

10.2495/CMEM950321

Volume

12

Pages

9

Published

1995

Size

866 kb

Author(s)

A. Cunha, A. Laje, A. Gomes & E. Caetano

Abstract

This paper, apart from stressing the interest of the use of laser interferometry techniques in Experimental Structural Dynamics, refers the evaluation of the level of precision provided by a laser sensor based on that kind of technique, in the development of not only short, but specially relatively long distance dynamic measurements. Simultaneously, an attempt to get further knowledge concerning the degree of importance of the nature and type of surfaces observed by the laser beam has also been made, using several steel and concrete sample surfaces, with different characteristics, in terms of rugosity and painting. The main results presented, specially expressed in terms of comparisons of frequency response and coherence function estimates obt

Keywords