Development and Application of Micro Fiber-optic Pressure Sensor
Date Issued
2008
Date
2008
Author(s)
Tseng, Ying-Tzu
Abstract
Sensors comprised of strain gauges are mostly used to measure intervertebral disc pressure. However, their large size and requirement for electricity are clear disadvantages for such biomedical application. In this study, a fiber-optical pressure sensor based on FBG is proposed. Under hydraulic pressure, sensitivity is 0.06 pm/kPa for static calibration and -0.147?0.0137 mV/kPa for dynamic, and both have greater coefficient of determination (r2) than 0.99. In ex vivo test, measured pressure has a linear relation with applied load, which agrees with previous studies in lumbar spines. The sensitivity to load is 1.74 kPa/N with r2 0.998. Even under 15Hz cyclic compression loading, the sensor still has great dynamic performance.
Subjects
FBG
Intervertebral disc
Pressure Sensor
Sensitivity
Ev vivo
Type
thesis
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