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Proceedings Paper

Continuous phase shift subtraction: a technique for vibration analysis in industrial environments
Author(s): Peder Johnson; Per T. Henrikson
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Paper Abstract

A subtraction technique, continuous phase shift subtraction, is presented and compared both theoretically and experimentally to some Digital Speckle Pattern Interferometry (DSPI) techniques for vibration measurements. The method is found to be an improvement to other techniques in rough environments due to low sensitivity to disturbances. Continuous phase shift subtraction is a technique for finding resonance frequencies and corresponding modal shapes which is cost effective, robust, stable and easy to handle, i.e. a technique suitable for industrial use. The comparison assumes a DSPI system for out-of-plane measurements and the described methods are all based on the time-averaged technique with additional digital image processing.

Paper Details

Date Published: 23 August 1996
PDF: 6 pages
Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); doi: 10.1117/12.248635
Show Author Affiliations
Peder Johnson, Lulea Univ. of Technology (Sweden)
Per T. Henrikson, Volvo Aero Corp. (Sweden)


Published in SPIE Proceedings Vol. 2868:
Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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