| 摘要: |
| 为了准确修正应用光纤光栅传感技术监测得到的沥青路面应变响应信息，并为沥青路面温度场实测提供有效的技术手段，针对光纤光栅温度传感器在沥青路面应用的标定方法及输出特征展开了研究.采用水浴方法对使用前传感器进行标定；通过对碾压成型后的复合车辙板试件内温度传感器的再次标定，分析了沥青路面碾压工艺对埋设光纤光栅温度传感器标定结果的影响；采用车辙试验仪对成型的复合车辙板进行碾压，模拟分析荷载对光纤光栅温度传感器输出结果的影响.结果表明：二次多项式拟合可满足温度误差不超过±0.5℃的标定合格标准，符合光纤光栅温度传感器的标定模型；复合车辙试件成型12h的温度传感器标定结果与水浴标定结果差距较大，但2d后的标定结果差距减小；荷载会对温度传感器的输出信息产生影响，但响应信息仍能保证精度. |
| 关键词: 道路工程 光纤光栅 温度传感器 温度场 校准 |
| DOI：10.3969/j.issn.1007 9629.2013.05.017 |
| 分类号: |
| 基金项目: |
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| Calibration Method of FBG Temperature Sensor Used in Asphalt Pavement |
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TAN Yi qiu1, WANG Hai peng1, MA Shao jun1, DONG Ze jiao1, SHAO Xian zhi2, CHEN Feng chen2
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1.School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China;2.China Airport Construction Group Corporation, Beijing 100100, China
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| Abstract: |
| In order to accurately improve asphalt pavement strain response information monitored by FBG(fiber Bragg grating) sensing technology and provide effective technical means for asphalt pavement temperature field measurement, the calibration method of FBG temperature sensor used in asphalt pavement and the output characteristics were researched. The FBG temperature sensor was calibrated by water bath method before used. Through secondly calibrating FBG temperature sensor embedded in the composite plate specimen shaped by rolling, the influence of asphalt pavement compaction technology on calibration results of FBG temperature sensor was analyzed. The composite plate specimen was rolled by rutting test apparatus in order to simulate and analyze the influence of loading on output results of FBG temperature sensors. The results show that two polynomial fitting can meet the qualified standard of less than ±0.5℃, and fits the calibration model of FBG temperature sensor. Calibration results of temperature sensor tested in 12h after molding of the composite plate specimen has big difference from the test results of water bath. But the difference of results tested after 2 d is smaller than before. Loading will affect the output information of FBG temperature sensors. But the accuracy of the information can still be guaranteed. |
| Key words: road engineering fiber Bragg grating(FBG) temperature sensor temperature field calibration |
