Fiber Bragg grating based displacement sensors with low visual impact for structural health monitoring applications – Monastery of Batalha case

A novel, low-visibility displacement sensing system using fiber Bragg gratings has been successfully implemented for long-term structural health monitoring at the UNESCO-listed Monastery of Batalha. This minimally intrusive approach allows for precise tracking of crack and joint movements with minimal visual impact, addressing preservation challenges for heritage sites. The sensors, featuring transparent holders and adjustable pre-strain mechanisms, offer a cost-effective, versatile alternative to traditional methods. Initial data collected over months demonstrates their operational efficacy, providing valuable insights for future conservation interventions.

Pereira, L., Bourgeois, I., Rodrigues, H., Varum, H., & Antunes, P. (2024). Fiber Bragg grating based displacement sensors with low visual impact for structural health monitoring applications – Monastery of Batalha case. Sensors and Actuators A: Physical, 368, 115117. https://doi.org/10.1016/j.sna.2024.115117