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光纤温度传感器防辐射罩的设计与分析

发表时间:2016-06-30  浏览量:2173  下载量:1198
全部作者: 朱朝贵;刘清惓;杨杰
作者单位: 南京信息工程大学江苏省大气环境与装备技术协同创新中心;南京信息工程大学电子与信息工程学院;南京信息工程大学江苏省气象探测与信息处理重点实验室;南京信息工程大学大气物理学院
摘 要: 为提高大气温度观测精度,设计了一种光纤温度传感器防辐射罩。为验证该防辐射罩的功效,利用计算流体动力学(computational fluid dynamics,CFD)方法,以太阳辐射强度和气流速度作为辐射升温量的影响因子,设定相同的环境条件,分别对传统百叶箱和光纤温度传感器防辐射罩进行CFD仿真计算。分析仿真结果发现,设计的光纤温度传感器防辐射罩相比传统百叶箱,可将太阳辐射引起的误差大幅度降低。最后,利用CFD分析计算出不同环境条件下,光纤温度传感器防辐射罩内部光纤光栅温度传感器探头放置点的辐射升温量,采用遗传算法对计算结果进行拟合,获得辐射升温量修正方程。为验证辐射升温量修正方程的准确性,使用修正方程计算出一些特征点的值,再使用CFD方法仿真计算出相同特征点的值。对比修正值与仿真值后得出结论,辐射升温量修正方程具有较好的修正效果。
关 键 词: 大气科学;仿真技术;温度传感器;计算流体动力学;太阳辐射
Title: Design and analysis of optical fiber temperature sensor radition sheild
Author: ZHU Chaogui, LIU Qingquan, YANG Jie
Organization: Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology; School of Electronic and Information Engineering, Nanjing University of Information Science and Technology; Jiangsu Key Laboratory of Meteorological Observation and Signal Processing, Nanjing University of Information Science and Technology; School of Atmospheric Physics, Nanjing University of Information Science and Technology
Abstract: In order to improve the accuracy of atmospheric temperature measurement, a new optical fiber temperature sensor for surface meteorological observation is designed in this paper. To verify the design of the actual performance of the radiation shield in this paper, using the method of computational fluid dynamics (CFD) with the intensity of solar radiation and air velocity as impact factors, the amount of radiation heating of themometer screen and radiation sheild are designed in this paper for CFD simulation in the same environment. The simulation results show that compared to the traditional radiation shield, the optical fiber temperature sensor designed in this paper can reduce the errors caused by solar radiation greatly. Finally, a computational fluid dynamics method is implemented to analyze and calculate the temperature of optical fiber temperature sensor placement induced by radiation in optical fiber temperature sensor radition shield under various environmental conditions. Then, a correction equation of the temperature rise is obtained by surface fitting using a genetic algorithm. In order to verify the accuracy of the modified equation, the values of some characteristic points are calculated by using the correction equation and the values of the same points are calculated by using the CFD method. By contrast of correction value and simulation value, the conclusion can be drew that the radiant temperature correction equation has good correction effect.
Key words: atmospheric sciences; simulation technology; temperature sensor; computational fluid dynamics; solar radiation
发表期数: 2016年6月第12期
引用格式: 朱朝贵;刘清惓;杨杰. 光纤温度传感器防辐射罩的设计与分析[J]. 中国科技论文在线精品论文,2016,9(12):1253-1261.
 
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