| 基于Bragg光纤光栅传感器的监测系统设计 |
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| 引用本文： | 董天奇,魏达,雷宇,何焰蓝,胡小景. 基于Bragg光纤光栅传感器的监测系统设计[J]. 物理实验, 2010, 30(2) |
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| 作者姓名： | 董天奇 魏达 雷宇 何焰蓝 胡小景 |
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| 作者单位： | 1. 国防科技大学,光电科学与工程学院,湖南,长沙,410073
2. 国防科技大学,理学院,湖南,长沙,410073 |
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| 摘 要： | 设计了基于Bragg光纤光栅传感技术的监测系统,当光纤光栅所处环境的温度、应力、应变或其他物理量发生变化时,光栅的周期或纤芯折射率将发生变化,从而使反射光的波长发生变化,通过测量反射光中心波长的变化,就可以获得待测物理量的变化情况.该系统利用薄膜滤波器完成对外界的分布式测量,采用光强度检测,能够实现无缝监测.
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| 关 键 词： | Bragg光纤光栅 参考光栅 结构监测 |
Monitoring system based on fiber Bragg grating strain sensor |
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| DONG Tian-qi,WEI Da,LEI Yu,HE Yan-lan,HU Xiao-jing. Monitoring system based on fiber Bragg grating strain sensor[J]. Physics Experimentation, 2010, 30(2) |
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| Authors: | DONG Tian-qi WEI Da LEI Yu HE Yan-lan HU Xiao-jing |
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| Affiliation: | DONG Tian-qia,WEI Daa,LEI Yua,HE Yan-lanb,HU Xiao-jingb (a.College of Photoelectric Science , Enginerring,b.College of Science,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | Monitoring system is designed based on fiber Bragg grating stain sensor.When the temperature,stress,strain or others physical quantity change,the grating period or grating core refractive index changes,then the wavelength of reflected light changes.The changes of the quantity can be obtained by measuring the change of the centre wavelength.By adopting film filter,the outside distribution measurement is realized,and by adopting light intensity detection,seamless monitoring is also realized. |
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| Keywords: | fiber Bragg grating reference fiber grating structure monitoring |
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