• DocumentCode
    1088861
  • Title

    Laser torquemeter: immunity to memory quantisation noise

  • Author

    Wilmshurst, T.H. ; Rothberg, S.J. ; Halliwell, N.A.

  • Author_Institution
    Dept. of Electron., Southampton Univ., UK
  • Volume
    27
  • Issue
    22
  • fYear
    1991
  • Firstpage
    2037
  • Lastpage
    2038
  • Abstract
    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.
  • Keywords
    measurement by laser beam; speckle; torquemeters; address quantisation; immunity to memory quantisation noise; laser torquemeter; limit cycle elimination; quantisation error elimination; shaft twist measurement; speckle pattern periodicity; stored speckle pattern signals;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19911261
  • Filename
    132976
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1088861