Plastic Optical Fibre Sensor for Spine Bending Monitoring with Power Fluctuation Compensation
Plastic Optical Fibre Sensor for Spine Bending Monitoring with Power Fluctuation Compensation
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DOI：
10.3390/s131114466
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发表时间：
2013-11-01
期刊：
影响因子：
3.9
通讯作者：
Lewis, Elfed
中科院分区：
文献类型：
--
作者：
Zawawi, Mohd Anwar;O'Keeffe, Sinead;Lewis, Elfed
本文介绍了一种基于强度的光纤弯曲传感器的功率波动补偿的实现，该传感器旨在临床环境中监测人体脊柱弯曲。为了补偿来自传感器光源的光强变化，参考信号通过固定在距离源光纤端尖一定距离的铝箔表面的光反射提供。从结果中发现，所研究的传感器补偿技术能够在0度到20度之间的弯曲角工作范围内实现2度分辨率。该研究还表明，由于输入电压在2.9 V和3.4 V之间变化，输出电压比具有0.55%的转移，并且在2小时的测量中具有0.25%的输出漂移。有了传感器的特性，临床环境中的人体脊柱监测可以使用功率波动补偿的方法来实现。
This paper presents the implementation of power fluctuation compensation for an intensity-based optical fibre bending sensor aimed at monitoring human spine bending in a clinical environment. To compensate for the light intensity changes from the sensor light source, a reference signal was provided via the light reflection from an aluminum foil surface fixed at a certain distance from the source fibre end tips. From the results, it was found that the investigated sensor compensation technique was capable of achieving a 2 degrees resolution for a bending angle working range between 0 degrees and 20 degrees. The study also suggested that the output voltage ratio has a 0.55% diversion due to input voltage variation between 2.9 V and 3.4 V and a 0.25% output drift for a 2 h measurement. With the achieved sensor properties, human spine monitoring in a clinical environment can potentially be implemented using this approach with power fluctuation compensation.