2134/19766
T.H. Wilmshurst
T.H.
Wilmshurst
Steve Rothberg
Steve
Rothberg
Neil A. Halliwell
Neil A.
Halliwell
Laser torquemeter -immunity to memory quantization noise
Loughborough University
2015
untagged
Mechanical Engineering not elsewhere classified
Artificial Intelligence and Image Processing
2015-12-07 14:23:37
Journal contribution
https://repository.lboro.ac.uk/articles/journal_contribution/Laser_torquemeter_-immunity_to_memory_quantization_noise/9544988
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.