微型光纖壓力感測器研發與應用

Development and Application of Micro Fiber-optic Pressure Sensor

曾映諮(Ying-Tzu Tseng)

指導教授 ： 單秋成

國立臺灣大學/工學院/機械工程學研究所/碩士(2008年)

https://doi.org/10.6342/NTU.2008.01271

摘要

ㄧ般用來量測椎間盤壓力的感測器，是由電阻式應變計製作而成，其大尺寸與需導電的特性，可能對生物體造成一定威脅。因此本研究擬發展ㄧ具生物相容性、尺寸小且不需導電的微型光纖壓力感測器，來進行椎間盤或生物體內的壓力量測。內部含有布拉格光纖光柵作為感測元件的針管，其光纖與外部壓力間的感測機制是透過聚合物來轉換。在液靜壓的油壓系統內，對感測器進行靜態與動態的壓力校正，靈敏度分別為0.06 pm/kPa與 -0.147±0.0137 mV/kPa，線性度皆達0.99以上。
椎間盤活體外壓力量測試驗中，可得椎間盤內壓力會與所受負載成正比，與文獻結果相符。感測器對施力負載的靈敏度為 1.74 kPa/N，線性度達0.999。感測器即使在15Hz動態循環試驗下，仍然有良好的動態表現。

關鍵字

光纖光柵 ； 壓力感測 ； 靈敏度 ； 椎間盤 ； 活體外

並列摘要

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.

並列關鍵字

FBG ； Intervertebral disc ； Pressure Sensor ； Sensitivity ； Ev vivo

參考文獻

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