Open AccessUltra-high curvature sensors for multi-bend structures using fiber Bragg gratings
Author(s) -
M. S. Jang,
Jun Sik Kim,
Soong Ho Um,
Sungwook Yang,
Jinseok Kim
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.002074
Subject(s) - curvature , fiber bragg grating , optics , bending , materials science , sensitivity (control systems) , optical fiber , fiber optic sensor , calibration , physics , geometry , electronic engineering , mathematics , engineering , composite material , quantum mechanics
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.