Laser Doppler position sensor for position and shape measurements of fast rotating objects

Jürgen Czarske; Thorsten Pfister; Lars Büttner

doi:10.1117/12.695462

15 September 2006 Laser Doppler position sensor for position and shape measurements of fast rotating objects

Jürgen Czarske, Thorsten Pfister, Lars Büttner

Proceedings Volume 6341, Speckle06: Speckles, From Grains to Flowers; 63411R (2006) https://doi.org/10.1117/12.695462
Event: Speckle06: Speckles, From Grains to Flowers, 2006, Nimes, France

Abstract

We report about a novel optical method based on laser Doppler velocimetry for position and shape measurements of moved solid state surfaces with approximately one micrometer position resolution. 3D shape measurements of a rotating cylinder inside a turning machine as well as tip clearance measurements at a transonic centrifugal compressor performed during operation at 50,000 rpm and 586 m/s blade tip velocity are presented. All results are in good agreement with conventional reference probes. The measurement accuracy of the laser Doppler position sensor is investigated in dependence of the speckle pattern. Furthermore, it is shown that this sensor offers high temporal resolution and high position resolution simultaneously and that shading can be reduced compared to triangulation. Consequently, the presented laser Doppler position sensor opens up new perspectives in the field of real-time manufacturing metrology and process control, for example controlling the turning and the grinding process or for future developments of turbo machines.

Citation Download Citation

Jürgen Czarske, Thorsten Pfister, and Lars Büttner "Laser Doppler position sensor for position and shape measurements of fast rotating objects", Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 63411R (15 September 2006); https://doi.org/10.1117/12.695462

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