【摘要】 针对结构裂缝监测的需要,依据OTDR光时域反射技术和瑞利散射原理,研究开发了一种采用分布式光纤传感器的光纤传感的裂缝监测技术;设计了裂缝监测试验方案,包括试验试样、试验装置的设计计算;验证了这种监测技术的可行性,可实现裂缝的定宽、定位监测。初始感知裂缝宽为0.03mm,并根据试验数据拟合出半经验公式,这一实验结果还可以作为全分布式光纤传感器进一步深入研究的参考。更多还原

【Abstract】 To the demand of crack monitoring of the concrete structure, based on Optical Time-Domain Reflectometry and Rayleigh scattering, a kind of crack monitoring optic fiber technique using distributed fiber sensor was investigated. The scheme of crack monitoring was designed, including the design and calculation of the sample and its setting. The feasibility of crack monitoring was verified, It can fix the width and position of cracks. The initial sensing crack width reach 0.03 mm; and semi-empirical formula was fitted from data.更多还原