Abstract
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° resolution for a bending angle working range between 0°and 20°. 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.
| Original language | English |
|---|---|
| Pages (from-to) | 14466-14483 |
| Number of pages | 18 |
| Journal | Sensors |
| Volume | 13 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 25 Oct 2013 |
Keywords
- Intensity modulation technique
- Plastic optical fibre sensor
- Power fluctuation compensation
- Spine monitoring