Source: http://opticjourn.ru/vipuski/1647-opticheskij-zhurnal-tom-85-01-2018.html
Timestamp: 2019-04-24 08:59:58+00:00

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Демонстрируется применение эффективного высокочувствительного оптического волоконного датчика на основе брэгговской решетки для определения деформаций и степени коррозии в строительных конструкционных элементах. чувствительность такого оптического датчика увеличена в результате изучения влияния различных профилей решетки, ее длины и показателя преломления сердцевины волокна. Экспериментально показано, что предложенная однородная волоконная брэгговская решетка с показателем преломления сердцевины 1,46 и длиной решетки 50000 мкм обеспечивает наилучшую чувствительность в терминах сдвига длины волны (приблизительно 3 нм). Для проверки достоверности проведено сравнение теоретических расчетов с экспериментальными результатами, показано, что предложенный датчик способен осуществлять мониторинг деформации/коррозии с высокой чувствительностью и скоростью.
Ключевые слова: волоконная брэгговская решетка, чувствительность, коррозия, деформации.
An efficient and highly sensitive fiber Bragg grating optical sensor is demonstrated to detect the strain and corrosion in civil structures. The sensitivity of fiber Bragg grating optical sensor is enhanced after examining different grating shapes, grating length and refractive indexes of core. The experimental results shows that the proposed uniform grated fiber Bragg grating with 1.46 refractive index and 50000 µm of grating length provides better sensitivity in the term of wavelength shift (approximately 3 nm). The theoretical results are also compared with the experimental results for validation and it is observed that the proposed sensor can monitor strain/corrosion with high sensitivity and speed.
Keywords: fiber Bragg grating, sensitivity, corrosion, strain.
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