Optical fiber sensors for monitoring ingress of moisture in structural concrete
Optical fiber sensors for monitoring ingress of moisture in structural concrete
复制标题
用于监测结构混凝土中水分进入的光纤传感器
DOI：
10.1063/1.2200744
复制
发表时间：
2006
影响因子：
1.6
通讯作者：
K. Grattan
中科院分区：
文献类型：
--
作者：
T. L. Yeo;M. C. Cox;L. Boswell;T. Sun;K. Grattan
基于光纤的湿度传感器，使用光纤布拉格光栅与湿敏聚合物涂层制成，用于检测和监测水分的运动，通过标准化的立方体由不同类型的结构混凝土样品制成。所获得的数据可以提供关于不同类型混凝土的性质的信息，从而提供关于溶解盐的迁移的信息，例如，氯化钠，鉴于其对混凝土内的钢筋的有害影响，氯化钠是重要的。为了进行这项研究，两个这样的光纤传感器被放置在不同的距离从立方体表面的边缘到混凝土样品的内部，并在恒定的温度下受到恒定的水头。光纤传感器通过检测通过样品迁移的水分对水的进入做出反应，这由传感器的布拉格波长的偏移指示。
Fiber optic-based humidity sensors, fabricated using fiber Bragg gratings coated with moisture sensitive polymer, are employed in detecting and monitoring the movement of moisture through standardized cubes made from samples of different types of structural concrete. Data obtained can give information on the properties of different types of concrete and thus on the migration of dissolved salts, e.g., sodium chloride, which is important in view of their deleterious effects on reinforcement bars within concrete. To undertake the research, two such optical fiber sensors were placed at varying distances from the edge of the cube face to the inner part of the concrete sample and subjected to a constant head of water at a constant temperature. The optical fiber sensors reacted to the ingress of water by detecting the moisture migrating through the sample, indicated by a shift in the Bragg wavelength of the sensor.