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Proceedings Paper

In-process shape and roundness measurements at turning machines using a novel laser Doppler profile sensor
Author(s): Thorsten Pfister; Lars Buettner; Juergen Czarske
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Paper Abstract

We have investigated the application of a laser Doppler profile sensor for in-process shape and roundness measurements at turning machines. This sensor is an extension of a conventional laser Doppler velocimeter (LDV), where two interference fringe systems with contrary fringe spacing gradients are generated inside the same measuring volume using wavelength division multiplexing. Scattering objects passing the measuring volume generate scattered light signals with two different Doppler frequencies, from which the velocity as well as the position of the objects can be determined via a proper calibration function. Hence, the radius and the tangential velocity and, thus, the shape of rotating work pieces and components, e.g. turbine blades or turning parts, can be measured absolutely and with only one single sensor. Two-dimensional and three-dimensional measurements of shape, excentricity, and roundness on quickly rotating cylinders inside a turning machine are presented. The results are compared with tactile measurements conducted with a coordinate measuring machine.

Paper Details

Date Published: 14 February 2005
PDF: 12 pages
Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); doi: 10.1117/12.611600
Show Author Affiliations
Thorsten Pfister, Laser Zentrum Hannover e.V. (Germany)
Lars Buettner, Laser Zentrum Hannover e.V. (Germany)
Juergen Czarske, Laser Zentrum Hannover e.V. (Germany)


Published in SPIE Proceedings Vol. 5776:
Eighth International Symposium on Laser Metrology
R. Rodriguez-Vera; F. Mendoza-Santoyo, Editor(s)

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