Fiber-optic Bragg grating sensors for bridge monitoring
Fiber-optic Bragg grating sensors for bridge monitoring
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DOI：
10.1016/s0958-9465(96)00040-6
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发表时间：
1997-02-01
影响因子：
10.5
通讯作者：
GuhaThakurta, A
中科院分区：
文献类型：
--
作者：
Maaskant, R;Alavie, T;GuhaThakurta, A
光纤布拉格光栅应变传感器由于其出色的稳定性和长期监测的潜力，在结构监测方面具有很大的潜力。这种传感技术利用了频谱编码信号，该信号提供了对困扰许多其他光纤和电子传感技术的信号强度波动的固有免疫力。这导致测量稳定性和引线/互连不敏感性，从而允许以高分辨率和准确度进行长期和间歇性监测。光纤光栅传感器是光纤固有的，因此利用其极小的尺寸和固有的强度和耐用性。最近的结果提供了从安装在公路桥梁的传感器阵列。应变传感器安装在钢和碳纤维增强塑料预应力筋上，这些预应力筋嵌入桥梁的预制梁中。交通负荷和松弛行为的钢筋束的测量。简要讨论了光纤光栅技术在长应变传感和应变分布测量中的应用前景。(C)1997年爱思唯尔科学有限公司。
Fiber-optic Bragg grating strain sensors hold a great deal of potential for structural monitoring because of their exceptional stability and demonstrated potential for long-term monitoring. This sensing technology takes advantage of a spectrally encoded signal which provides inherent immunity from signal intensity fluctuations which plague many other fiber-optic and electronic sensing techniques. This results in measurement stability and lead/interconnect insensitivity which permit long-term and intermittent monitoring with high resolution and accuracy. Fiber-optic grating sensors are intrinsic to the optical fiber thus capitalizing on its extremely small size and inherent strength and durability. Recent results are provided from a sensor array installed in a road bridge. The strain sensors are attached to both steel and carbon-fiber-reinforced plastic prestressing tendons, which are embedded in the precast girders of the bridge. Measurements of traffic loads and the relaxation behaviour of the tendons are presented. The potential of fiber grating technology is briefly discussed including its application in long-gage strain-sensing and strain-distribution measurements. (C) 1997 Elsevier Science Limited.