A5.4 - Simplified and Miniaturized Laser Doppler Distance Sensor for Dynamic Position and Shape Measurement at Rotating Objects

Event
SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg
Band
Proceedings SENSOR 2009, Volume I
Chapter
A5 - Mechanical Sensors III
Author(s)
T. Pfister, L. Buettner, J. Czarske - Technische Universität Dresden, Dresden, Germany
Pages
133 - 138
DOI
10.5162/sensor09/v1/a5.4
ISBN
978-3-9810993-4-8
Price
free

Abstract

We present a simple and miniaturized laser Doppler distance sensor comprising only one single fanshaped interference fringe system for dynamic position and shape measurement of fast moving objects with micrometer precision. Due to its low complexity, it can be built very compact and cheap, which is crucial for many industrial applications. It will be shown theoretically as well as experimentally that its position uncertainty is in principle independent of the object velocity in contrast to conventional distance sensors. In order to evidence the operational capability and the application potential of this simplified laser Doppler distance sensor, radial and axial shape measurements of rotating bodies were carried out in comparison with a commercial triangulation sensor. An average postion resolution of 2.3 µm was obtained.

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