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http://dx.doi.org/10.12673/jant.2020.24.6.465

Low-cost Fiber Bragg Grating Interrogator Design for Unmanned Aircraft  

Hong, Jae-Beom (Fiberpia Co. Ltd)
Hong, Gyo-Young (Department of Aviation system Engineering, Hanseo University)
Publication Information
Journal of Advanced Navigation Technology / v.24, no.6, 2020 , pp. 465-470 More about this Journal
Abstract
Complex materials are widely used in aviation industries where lightweighting is essential because they have lighter properties than metals. However, composite materials can cause defects such as internal void formation, poor adhesive mixing, and non-adhesive parts during the production process, and there is a risk of micro-cracking and interlayer separation due to low energy impact. Therefore, a structural damage test is essential. As a result, structural integrity monitoring using FBG is drawing attention. Compared to conventional electrical sensors, FBG has the advantage of being more corrosion-resistant and multiplexed without being affected by electrical noise. However, interloggers measuring FBG are expensive and have a large disadvantage because they are made on the premise of measuring large structures. In this paper, low-cost interloggers were designed for use in unmanned or small aircraft using optical switche, WDM filter, and LTFs, and compared to conventional high-priced interrogator.
Keywords
FBG; Interrogator; Sensor; Optical sensor; Personal air vehicle;
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