Development and application of in-fibre Bragg grating based biomedical pressure sensors
Date
2008-07-15T23:30:01Z
Authors
Dennison, Christopher Raymond Stuart
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Abstract
Two in-fibre Bragg grating based optical pressure sensors were developed to
address the limitations of conventional solid-state electronic biomedical sensors. The first
sensor, developed for intervertebral disc pressure measurements varying over several
MPa, had a major diameter of only 400 μm and sensing area of 0.03 mm2. This sensor
was validated in spine biomechanics studies and was shown to: give accurate and
repeatable measurements, be compatible with the small (e.g. cervical) discs, and alter disc
mechanics less than the current alternative sensor. This sensor is also the smallest, most
mechanically compliant disc pressure sensor presented to date.
The second FBG sensor was developed to measure sub-kPa pressure variations
and had a major diameter and sensing area of only 200 μm and 0.02 mm2, respectively.
This sensor achieves sub-kPa repeatability through a novel design that is approximately
100 times smaller than other FBG sensors presented with sub-kPa pressure repeatability.
Description
Keywords
fibre Bragg, pressure, biomedical, biomechanics, sensor, optical