Laser Doppler Velocimetry of Rotating Cylinder with Retroreflecting Surface
Gregory Dolya
Professor, Department of Theoretical and Applied Systems Engineering, Faculty of Computer Science, V.N. Karazin Kharkiv National University, Kharkiv, Ukraine
https://orcid.org/0000-0001-8888-5189
Kostiantyn Bondarenko
Student, Department of Systems and Technologies Modeling, Faculty of Computer Science, V.N. Karazin Kharkiv National University, Kharkiv, Ukraine
https://orcid.org/0000-0002-2430-0716
DOI: https://doi.org/10.20448/journal.508.2018.51.1.7
Keywords: Laser speckle-velocimetry, Doppler frequency, Retro reflective sheeting, Microscopic glass beads, Rotation frequency, Cylindrical objects.
Abstract
A method for measuring rotation frequency of cylindrical object is considered, taking into account features of retroreflecting surface based on micro glass beads. Method involves single-beam object probing, detection of scattered radiation and spectral analysis of the recorded photocurrent. A mathematical model of the proposed method is described. Results of physical simulation are presented in form of plots, showing dependencies of received signal power on the frequency. Analysis of changes in registered photocurrent spectrum was done, taking into account both changes due to the vary of angular velocity of cylinder and those caused by rotation axis displacement in regard of falling light beam.