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Low cost portable sensor for real-time monitoring of lower back bending
Author(s): Wern Kam; Kieran O'Sullivan; Waleed S. Mohammed; Elfed Lewis
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Paper Abstract

A mechanically robust and compact optical fibre sensor system is described to monitor the bending of the lower back bone in both sagittal and frontal plane. Both bending modes are monitored through the change of the coupled optical intensity ratio between three output fibers aligned to one input fiber. This provides real time feedback when different postures are sustained. The output ratio is calibrated to bending angles using an optical setup that utilized a precise rotational stage. An operation range between -12° to 12° is demonstrated. It is also demonstrated that sensor is suitable for use in a clinical diagnosis system with the additional benefits of being non-invasive, robust, straightforward to use and low cost.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032373 (23 April 2017); doi: 10.1117/12.2264787
Show Author Affiliations
Wern Kam, Univ. of Limerick (Ireland)
Kieran O'Sullivan, Univ. of Limerick (Ireland)
Waleed S. Mohammed, Bangkok Univ. (Thailand)
Elfed Lewis, Univ. of Limerick (Ireland)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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