Physiological bending sensor based on tilt angle loss measurement using dual optical fibre

M. A. Zawawi, S. O'Keeffe, E. Lewis

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents the development of an extrinsic optical fibre sensor for continuous measurement of the human spine bending movement based on intensity modulation technique. Using the investigated sensor configuration, the bending angle was measurable in both flexion and extension direction with a maximum range of motion of 18o and-10o, respectively. From the output drift assessment of the sensor, bending accuracy of up to 0.5° was achievable, thus making it suitable for clinical environment application. A divided-beam referencing technique was also implemented in the sensor configuration to compensate for the input power fluctuation and temperature variation.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalInternational Journal on Smart Sensing and Intelligent Systems
Volume7
Issue number5
DOIs
Publication statusPublished - 1 Dec 2014

Keywords

  • Bending assessment
  • Divided-beam referencing
  • Intensity modulation
  • Optical fibre sensor

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