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Comparing polymer optical fiber, fiber Bragg grating, and traditional strain gauge for aircraft structural health monitoring

机译：比较聚合物光纤，光纤布拉格光栅和用于飞机结构健康监测的传统应变仪

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摘要

Systems for structural health monitoring in aeronautical structures use methods of measuring the elongation that normally require too heavy setups or difficult assembly jobs, such as those based on traditional strain gauges. Alternative methods based on fiber Bragg gratings tend to be very expensive. We analyze the possibility of improving the existing designs with the aid of low-cost plastic optical fiber sensors. For this purpose we test these sensors in a rudder flap subjected to different types of bending forces. The results show that they offer good stability and repeatability, and the measured values are very similar to those obtained with Bragg sensors.
机译：用于航空结构的结构健康监测的系统使用测量伸长率的方法，这些方法通常需要太重的设置或困难的组装工作，例如基于传统应变仪的那些。基于光纤布拉格光栅的替代方法往往非常昂贵。我们分析了借助低成本塑料光纤传感器改进现有设计的可能性。为此，我们在舵板中对这些传感器进行了不同类型的弯曲力测试。结果表明，它们具有良好的稳定性和可重复性，并且测量值与使用布拉格传感器获得的测量值非常相似。

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