Spatially distributed fiber sensor with dual processed outputs

X. Xu; William B. Spillman Jr.; Richard O. Claus; K. E. Meissner; K. Chen

doi:10.1117/12.623415

23 May 2005 Spatially distributed fiber sensor with dual processed outputs

X. Xu, William B. Spillman Jr., Richard O. Claus, K. E. Meissner, K. Chen

Author Affiliations +

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623415
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

Given the rapid aging of the world’s population, improvements in technology for automation of patient care and documentation are badly needed. We have previously demonstrated a 'smart bed' that can non-intrusively monitor a patient in bed and determine a patient's respiration, heart rate and movement without intrusive or restrictive medical measurements. This is an application of spatially distributed integrating fiber optic sensors. The basic concept is that any patient movement that also moves an optical fiber within a specified area will produce a change in the optical signal. Two modal modulation approaches were considered, a statistical mode (STM) sensor and a high order mode excitation (HOME) sensor. The present design includes an STM sensor combined with a HOME sensor, using both modal modulation approaches. A special lens system allows only the high order modes of the optical fiber to be excited and coupled into the sensor. For handling output from the dual STM-HOME sensor, computer processing methods are discussed that offer comprehensive perturbation analysis for more reliable patient monitoring.

Citation Download Citation

X. Xu, William B. Spillman Jr., Richard O. Claus, K. E. Meissner, and K. Chen "Spatially distributed fiber sensor with dual processed outputs", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623415

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