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.