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基于光纤光栅的物体表面附近温度场测量

Temperature Distributed Sensing Technique for the Local-area of the Surface Based on Fiber Bragg Gratings

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摘要

提出一种利用光纤布喇格光栅温度传感器测量物体表面法向局域内温度场分布的新方法.将多个毛细管封装的波分复用光纤光栅温度传感器串接,沿待测位置法线方向平行于表面等间距放置,对法向局域内的温度进行准分布式监测,封装后的传感器响应时间为2.74 s.利用ANSYS软件对空气的热稳态层流进行分析,获得温度场分布的等值线图.实验得到温度随高度变化的一阶变化率为-24.262,二阶变化率为10.117 2,而ANSYS仿真结果给出的分别为-22.842和8.613,两者基本相符,验证了此测量方法的可靠性.该技术为了解温度场的局域分布提供了技术支撑,为航空器选材和构型的确定提供新的测试方案.

Abstract

Micro-packaged fiber Bragg grating temperature sensor is used to perform the distributed temperature sensing for the local area of the object surface. Packaged with steel capillary, ten wavelength-division-multiplexed temperature sensors are cascaded and placed in parallel along the tangential direction at the observed point for making quasi-distributed detection. The response time of the packaged sensors is 2.74 s. Using ANSYS software to analyze the thermal steady-state laminar flow of air the contour plots of temperature distribution was obtained. Experiments show that the first-order change rate of the curves of temperature change with height is -24.262, and the second-order change rate is 10.117 2. Comparing with the result of ANSYS simulation (its first-order change rate is -22.842, and second-order change rate is 8.613), the reliability of this measurement method was verified. This technology provides a technical support for knowing the local distribution of temperature as well as a new testing program for aircraft material selecting and configuration determining.

Newport宣传-MKS新实验室计划
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中图分类号:TN247

DOI:10.3788/gzxb20144305.0506001

收稿日期:2013-09-11

修改稿日期:2013-12-20

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作者单位    点击查看

余有龙:合肥工业大学 仪器科学与光电工程学院, 合肥 230009
薛航:合肥工业大学 仪器科学与光电工程学院, 合肥 230009
王彦晓:合肥工业大学 仪器科学与光电工程学院, 合肥 230009
段营营:合肥工业大学 仪器科学与光电工程学院, 合肥 230009

联系人作者:余有龙(youlongyu@163.com)

备注:余有龙(1965-),男,教授,博导,主要研究方向为光纤光栅传感器及网络化技术、光纤激光以及光无源器件的研究.

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