System for detection the structural damage appearance by the elastic wave propagation monitoring in solid using a fiber optical sensor network embedded in the structure
Currently the structural maintenance strategies are based on periodic time schedule inspection that are expensive and inefficiency, as it is no distinction between damage and undamaged structures procedures. It is proposed a system to interrogate an embedded fiber optic sensor network (low weigh and low intrusive) and monitor the elastic wave propagation through the structure. During any kind of damage appearance and growth, slight amplitude and high frequency elastic waves are generated and propagated everywhere in the structure. From the data of this measuring signals is possible to determine damage position and damage severity. Real time measurements allow to know the state of the structure in every moment, making possible to implement a condition-based maintenance . This technique can improve the efficiency and the time of operation, reducing financial and maintenance cost of all kind of structures.
This technological solution propose a measuring system based on Fiber Bragg Grating sensors (FBGs). FBG sensors can be easily multiplexed in a single optical fiber of only 0.2 mm diameter, that can be easily embedded or mounted in a structure. Damage appearance generate a elastic wave of low amplitude (less than 0.01 microstrain) and very high frequency (between 50kHz and 1MHz). The ability of perform this measurements and process this wave signals will allow to determine damage location and damage assessment, increasing, which improves safety and maintenance costs.
“Structural damage detection by a integrated fiber optic sensor network embedded or fixed in the structure will increase the safety, reduce the maintenance costs and increase the operation time”
“Maintenance based on the real condition of the structure requires an integrated sensor network that can provide the real condition of the structure in real time. This is mandatory to reduce operational cost”.
Structural Fiber Sensing contact
Antonio Fernández-López, Alfredo Güemes, Ángel Lozano Martín
ETSI Aeronáuticos - UPM
e: email@example.com; firstname.lastname@example.org; email@example.com
Innovation, Commercialization and Entrepreneurship Area
Centre of Support for Technological Innovation – UPM