Publication
Title
A comparative study of laser doppler vibrometers for vibration measurements on pavement materials
Author
Abstract
A laser Doppler vibrometer (LDV) is a noncontact optical measurement device to measure the vibration velocities of particular points on the surface of an object. Even though LDV has become more popular in road engineering in recent years, their signal-to-noise ratio (SNR) is strongly dependent on light scattering properties of the surface which, in some cases, needs to be properly conditioned. SNR is the main limitation in LDV instrumentation when measuring on low diffusive surfaces like pavements; therefore, an investigation on the SNR of different LDV devices on different surface conditions is of great importance. The objective of this research is to investigate the quality of two types of commercially available LDV systemsheliumneon (HeNe)-based vibrometers and recently developed infrared vibrometerson different surface conditions, i.e., retroreflective tape, white tape, black tape, and asphalt concrete. Both noise floor and modal analysis experiments are carried out on these surface conditions. It is shown that the noise floor of the HeNe LDV is higher when dealing with a noncooperative dark surface, such as asphalt concrete, and it can be improved by improving the surface quality or by using an infrared LDV, which consequently improves the modal analysis experiments performed on pavement materials.
Language
English
Source (journal)
Infrastructures
Publication
MDPI AG , 2018
ISSN
2412-3811
Volume/pages
3 :4 (2018) , p. 1-9
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Characterization of advanced materials using hybrid inverse modelling from full-field optical vibration measurements.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identification
Creation 12.11.2018
Last edited 15.07.2021
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