Ultra-high curvature sensors for multi-bend structures using fiber Bragg gratings
- Ultra-high curvature sensors for multi-bend structures using fiber Bragg gratings
- 김진석; 양성욱; 김준식; 장민수; 엄숭호
- Curvature; Fiber Bragg Grating
- Issue Date
- Optics express
- VOL 27, NO 3-2084
- Measuring high curvatures is essential in various applications such as structural engineering, medical treatment, and robotics. Herein, we present a novel ultra-high curvature sensor with an ultra-thin and highly flexible structure incorporating fiber Bragg gratings (FBGs). The sensor can measure curvature of bidirectional bending up to 200 m− 1. In addition, the multi-bend curvature sensor in conjunction with the proposed calibration scheme enables the accurate reconstruction of a curve with varying curvature. The sensitivity and the accuracy of the curvature sensor are investigated for different sensor designs. Finally, we demonstrate the accurate shape sensing of various 2-D patterns using the multi-bend curvatures sensor.
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