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Laser torquemeter -immunity to memory quantization noise

journal contribution
posted on 2015-12-07, 14:23 authored by T.H. Wilmshurst, Steve Rothberg, Neil A. Halliwell
Operation of the laser torquemeter relies on the periodicity of the speckle pattern backscattered from a rotating shaft. In the previous system a minimum measurable twist of 0.7' was imposed by address quantisation of the stored speckle pattern signals. The arrangement described provides immunity to this quantisation and the associated limit cycle oscillation, reducing the noise spectrum level to 3"/Hz12/ RMS while allowing 100 time-resolved torque readings per rotation.

Funding

The work is supported by the Paul Instrument Fund of The Royal Society.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

ELECTRONICS LETTERS

Volume

27

Issue

22

Pages

2037 - 2038 (2)

Citation

WILMSHURST, T.H., ROTHBERG, S. and HALLIWELL, N.A., 1991. Laser torquemeter -immunity to memory quantization noise. Electronics Letters, 27 (22), pp. 2037 - 2038.

Publisher

© IET

Version

  • VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

1991

Notes

This article is closed access.

ISSN

0013-5194

Language

  • en