In Situ Cross-Calibration of In-Fiber Bragg Grating and Electrical Resistance Strain Gauges for Structural Monitoring Using an Extensometer
In Situ Cross-Calibration of In-Fiber Bragg Grating and Electrical Resistance Strain Gauges for Structural Monitoring Using an Extensometer
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DOI：
10.1109/jsen.2009.2026990
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发表时间：
2009-11-01
影响因子：
4.3
通讯作者：
Grattan, Kenneth T. V.
中科院分区：
文献类型：
--
作者：
Grattan, Simon K. T.;Taylor, Su E.;Grattan, Kenneth T. V.
这项研究涉及用于结构监测的光纤应变传感器的直接校准，并在现场进行。检查基于光纤布拉格光栅的传感器系统连接到金属杆时的行为（以代表其在结构中用作钢筋的方式）并校准其响应。为了确保测量的有效性，这是使用引伸计完成的，并针对通常使用的电阻应变计的响应进行进一步校准，以进行比较。结果表明，可重复校准可为这些传感器生成合适的应变延伸几何因子，以便在光纤传感器系统用于结构监测应用时获得准确的应变数据。
This study addresses the direct calibration of optical fiber strain sensors used for structural monitoring and is carried out in situ. The behavior of fiber-Bragg-grating-based sensor systems when attached to metal bars, in a manner representative of their use as reinforcement bars in structures, was examined and their response calibrated. To ensure the validity of the measurements, this was done using an extensometer with a further calibration against the response of electrical resistance strain gauges, often conventionally used, for comparison. The results show a repeatable calibration generating a suitable geometric factor of extension to strain for these sensors, to enable accurate strain data to be obtained when the fiber-optic sensor system is in use in structural monitoring applications.