Smart sensing of aviation structures with fiber optic Bragg grating sensors

Potential low-cost optical fiber Bragg grating sensor systems for structural health monitoring and examples of their application

“…The wing was continuously loaded to simulate the complete lifetime of a passenger aircraft. Measurement values of two FBG strain sensor arrays (10 sensors each) surface-mounted on the upper and lower skins of the wing correspond very well to the values of electrical strain gauges applied nearby 11 . Recent results of a field test of a FBG strain and temperature sensor array installed on the fuselage of an A340-600 Airbus prototype have been reported in ref.…”

“…In order to realize potential low-cost solutions, a broadband light source (SLD) and polychromator spectrometer readout of FBG reflection signals in the 800-850 nm wavelength range have been preferred to scanning Fabry-Perot interferometers or tunable lasers in the 1550 nm range (the latter method was tested in the project by DaimlerChrysler with similar technical performance results 11 ). The high-resolution polychromator is designed as a 2-channel spectrometer with a 2048-pixel CCD detector (for quasi-static signals up to 1 kHz) and an additional photodiode array (for analog processing of dynamic signals up to 1 MHz), both illuminated by the same holographic diffraction grating (PMMA replicated for low-cost production).…”

Drug-Induced T-Wave Morphology Changesn

“…Research has been conducted on the utilization of fibre optical grating sensors for structural health monitoring on other structures such as aircrafts [82], bridges [83] and trains [84]. These structures are not subjected to as significant bending compared to a wind turbine blade and the work is therefore focused on strain measurement with FBGs, as the benefit of utilizing LPGs as bend sensors in these applications is negligible.…”

Fiber-optical grating sensors for wind turbine blades: a review

“…Much research has been done on utilizing fiber optical grating sensors for structural health monitoring on other structures such as aircrafts, 73 bridges, 74 and trains. 75 This is typically based on strain measurement with FBGs.…”