Evaluation of polymer-based eccentric FBG bending sensor for humidity, strain, temperature and torsion

verfasst von

Lennart Leffers, Bernhard Roth, Ludger Overmeyer

Abstract

We analyse and evaluate the sensitivity and robustness of an eccentric fiber Bragg grating sensor micro-structured into a polymer optical fiber under different relative humidity, temperature, strain and torsion conditions. Relative humidity and temperature conditions are established with a climate test chamber and prepared salt solutions. Though made of polymer, the cross-sensitivity of the sensor to relative humidity is low, enabling usage in rapidly changing environment applications, e.g., for movement detecting gloves or in vehicles, but also in high moisture situations. We find a linear dependence on temperature, so that either bending or temperature can be measured separately from each other. After rotation of one end, the sensor measures torsion by observing the light intensity and the change of the full width at half maximum. Strain measurement shows multiple elastic strain regions before final plastic deformations occur. In the next step, the flexible sensor system will be implemented in a sensor glove to monitor finger movement and detect different hand gestures.

Organisationseinheit(en)

Hannoversches Zentrum für Optische Technologien (HOT)
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Institut für Transport- und Automatisierungstechnik

Typ

Artikel

Journal

Optics and lasers in engineering

Band

166

ISSN

0143-8166

Publikationsdatum

07.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Atom- und Molekularphysik sowie Optik, Maschinenbau, Elektrotechnik und Elektronik

Elektronische Version(en)

https://doi.org/10.1016/j.optlaseng.2023.107568 (Zugang: Offen)