ISO 16063-11: UNCERTAINTIES IN PRIMARY VIBRATION CALIBRATION BY LASER INTERFEROMETRY. REFERENCE PLANES AND TRANSVERSE MOTION
Torben Licht, Sven Erik Salbøl
Abstract:
Primary vibration calibration by laser interferometry using quadrature outputs has been used for the last 10-15 years. The ISO 16063-11 was published in 1999 and this has increased the interest further.
With new compact laser interferometers the difficulties of optical alignment and adjustment has been practically eliminated and dedicated software has made the process automatic, permitting to gather much more data.
In most cases it is applied to reference transducers, either single-ended or meant for back-to-back calibration.
However the problem that the laser beam not always can be directed towards the point or surface to which it ideally should be directed, introduces errors that can be quite significant. At low frequencies this is often due to non-ideal exciter motions. At high frequencies it is often due to relative motion between points on apparently rigid mechanical structures or rocking or bending motion of the combined structures.
Some examples and solutions to these problems including uncertainty calculations will be presented.
Keywords:
vibration, calibration, interferometry
Download:
IMEKO-WC-2009-TC22-295.pdf
DOI:
-
Event details
Event name:
XIX IMEKO World Congress
Title:

Fundamental and Applied Metrology

Place:
Lisbon, PORTUGAL
Time:
06 September 2009 - 11 September 2009
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