The Laser Torsional Vibrometer: Noise-Floor Considerations

S. J. Rothberg; N. A. Halliwell; P. G. Eastwood; T. H. Wilmshurst

doi:10.1117/12.952916

31 July 1989 The Laser Torsional Vibrometer: Noise-Floor Considerations

S. J. Rothberg, N. A. Halliwell, P. G. Eastwood, T. H. Wilmshurst

Proceedings Volume 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis; (1989) https://doi.org/10.1117/12.952916
Event: Sira/Stress and Vibration: Recent Developments in Measurement and Analysis, 1989, London, United Kingdom

Abstract

Designers of rotating machinery seek to limit torsional vibrations in order to ensure smooth transmission of power and to minimise problems of coupling and bearing wear, excessive noise, fatigue etc. The principal disadvantage of traditional methods of torsional vibration measurement [1] is that they involve physical contact with the rotating member, requiring both potentially costly machinery "downtime" and space for installation in locations where access may already be restricted. Development of laser-based transducers [2] has produced solutions to these problems. In particular, the laser torsional vibrometer [3] provides non-contact measurement on rotating components of arbitrary cross-section and has the additional advantage of insensitivity to solid body motions of the component.

Citation Download Citation

S. J. Rothberg, N. A. Halliwell, P. G. Eastwood, and T. H. Wilmshurst "The Laser Torsional Vibrometer: Noise-Floor Considerations", Proc. SPIE 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis, (31 July 1989); https://doi.org/10.1117/12.952916

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