Cantilever-based biaxial FBG inclinometer with low cross-axis sensitivity

• Main Authors: Ramalingam, Nimalrajh, Yang, Hangting, Lim, Kok-Sing, Ahmad, Harith
• Format: Article
• Published: Wroclaw University of Science and Technology 2024
• Subjects: Q Science (General); QC Physics
• Online Access: http://eprints.um.edu.my/47107/; https://doi.org/10.37190/oa240206

This work proposes and demonstrates a biaxial sensing inclinometer based on two FBGs surfacemounted on two separate thin cantilevers with a diminishable cross-axis sensitivity. The measured sensitivities for the inclination angles in the x-z plane and y-z plane are 34.87 and 33.49 pm/deg, respectively. To enhance the protection of the delicate FBGs and minimize axis-to-axis cross-sensitivity, the carbon-steel cantilevers are strategically arranged in a perpendicular configuration, resulting in an impressively low cross-sensitivity value of just 0.9275%. This alignment not only offers mechanical shielding but also ensures optimal performance and accuracy for the FBGs.