A field deployable, multiplexed Bragg grating sensor system used in an extensive highway bridge monitoring evaluation tests
A field deployable, multiplexed Bragg grating sensor system used in an extensive highway bridge monitoring evaluation tests
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DOI：
10.1109/jsen.2005.846185
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发表时间：
2005-05
影响因子：
4.3
通讯作者：
Y. M. Gebremichael;W. Li;B. T. Meggitt;W. Boyle;K. Grattan;B. McKinley;L. Boswell;K. Aarnes;S. E. Aasen;B. Tynes;Y. Fonjallaz;T. Triantafillou
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文献类型：
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作者：
Y. M. Gebremichael;W. Li;B. T. Meggitt;W. Boyle;K. Grattan;B. McKinley;L. Boswell;K. Aarnes;S. E. Aasen;B. Tynes;Y. Fonjallaz;T. Triantafillou
多路光纤布拉格光栅传感器系统的测量带宽高达 200 Hz，能够观测动态载荷事件（例如道路交通），该系统已在挪威一座 346 米公路桥上设计、安装和测试了 18 个月，用于设计验证和结构完整性监测。由 32 个光纤布拉格传感器组成的网络与一组相应的电阻应变计进行表面粘合，以进行比较测试。波长数据根据两个热稳定 (/spl sim/0.15 pm) 参考光栅进行校准，该光栅消除了共模噪声并提供了绝对波长缩放。这些数据提供独立的应变和温度信息。长期测试结果显示，在测试期间具有良好的线性度和重复性<10 /spl mu//spl epsiv/，精度为/spl plusmn/5 /spl mu//spl epsiv/，分辨率为/spl plusmn/1 /spl mu//spl epsiv/。 FBG 传感器的读数与箔片传感器的读数相当，误差范围在 /spl plusmn/4 /spl mu//spl epsiv/ 范围内。
A multiplexed optical fiber Bragg grating sensor system with a measurement bandwidth of up to 200 Hz enabling dynamic loading events, e.g., road traffic, to be observed has been designed, installed, and tested over an 18-month period on a 346-m road bridge in Norway, for design verification and structural integrity monitoring purposes. A network of 32 fiber Bragg sensors was surface bonded along with a corresponding set of resistive strain gauges for comparative tests to be made. The wavelength data were calibrated against two thermally stabilized (/spl sim/0.15 pm) reference gratings, which rejected common mode noise and provided absolute wavelength scaling. These data provides independent strain and temperature information. Long-term test results showed good linearity and repeatability of <10 /spl mu//spl epsiv/ over the test period with a precision of /spl plusmn/5 /spl mu//spl epsiv/ and a resolution of /spl plusmn/1 /spl mu//spl epsiv/. The readings from the FBG sensors were comparable to those from the foil gauge sensors to within /spl plusmn/4 /spl mu//spl epsiv/.