Analytical Evaluation and Experiment of the Dynamic Characteristics of Double-Thimble-Type Fiber Bragg Grating Temperature Sensors.
Analytical Evaluation and Experiment of the Dynamic Characteristics of Double-Thimble-Type Fiber Bragg Grating Temperature Sensors.
复制标题
双套管式光纤布拉格光栅温度传感器动态特性分析评估与实验
DOI：
10.3390/mi12010016
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发表时间：
2020-12-26
期刊：
影响因子：
3.4
通讯作者：
Liang K
中科院分区：
文献类型：
--
作者：
Luo C;Wang H;Zhang D;Zhao Z;Li Y;Li C;Liang K
研制了一种隔离应力应变的双顶针型光纤布拉格光栅（FBG）温度传感器，采用空气、油脂和铜顶针三种材料进行封装。为了研究不同封装材料对传感器动态状态下时间常数的影响，根据集总热容（LHC）系统和热平衡理论，建立了传感器瞬态热传导数学模型，并采用解析解求解了时间常数。然后，建立了比例三维传感器仿真模型，采用有限元分析方法对瞬态换热过程进行了数值求解。为了验证模型的正确性，建立了测试三种传感器响应速度的实验系统，并将实验数据与解析解和数值解结果进行了比较。结果表明：包封材料的动态响应性能与包封材料参数有关；响应速度快于恢复速度；并且空气封装传感器的响应速度比油脂封装传感器快20%以上，比铜封装传感器快30%以上。蓄热容量越小，换热系数越大，传感器响应速度越快。
A double-thimble-type fiber Bragg grating (FBG) temperature sensor that isolates the stress strain is developed, and the three materials of air, grease, and copper thimble are employed for encapsulating. To investigate the effect of different encapsulation materials on the time constant of the sensors under dynamic conditions, the transient heat conduction mathematical model is built according to the lumped heat capacity (LHC) system and thermal equilibrium theory, and the time constant is solved by an analytical solution. Then, a proportional three-dimensional sensor simulation model is established and the transient heat transfer process is numerically solved by the finite element analysis method. To verify the models, an experimental system is established to test the response speed of the three-type sensor and the experimental data are compared with the analytical and numerical solution results. The results show that the dynamic response performance depends on the encapsulation material parameters; the response speed is faster than recovery speed; and the response speed of the air packaging sensor is more than 20% faster than that of the grease packaging sensor, and more than 30% faster than that of the copper packaging sensor. The smaller the heat storage capacity and the larger the heat transfer coefficient, the faster the sensor’s response speed.
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影响因子：
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作者：
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DOI：
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发表时间：
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影响因子：
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