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| 光纤Bragg光栅应变、温度交叉敏感问题的研究 | |
| 引用本文： | 王宏亮,张晶,乔学光,王瑜. 光纤Bragg光栅应变、温度交叉敏感问题的研究[J]. 应用光学, 2008, 29(5): 804-807 |
| 作者姓名： | 王宏亮 张晶 乔学光 王瑜 |
| 作者单位： | 西安石油大学,光电油气测井与检测教育部重点实验室,陕西,西安,710065 |
| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金，陕西省教育厅资助项目，中国石油天然气集团公司资助项目，中国石油天然气股份有限公司长庆油田分公司资助项目，陕西省教育厅资助项目，西安市重大技术创新基金，陕西省西安市科技局科技计划 |
| 摘 要： | 解决应变和温度的交叉敏感，实现应变和温度同时测量一直是光纤光栅传感器研究的关键问题。从应变和温度交叉敏感的物理机制出发，较为全面地介绍了几种主要解决方案：双波长矩阵法、2个包层直径不同的FBG法、啁啾光栅法等。并且基于双波长矩阵法，提出了一种基于管式弹性应变敏感元件的光纤光栅传感器结构，很好地实现了温度150℃，压力20MPa的同时区分测量，其温度灵敏度为0.02nm/℃。解决了温度和应变同时区分测量这一技术难题。 |
| 关 键 词： | 光纤Bragg光栅 交叉敏感 区分测量 |
| 收稿时间： | 2007-08-27 |
Study on strain and temperature cross sensitivity of fiber Bragg grating sensor |
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| WANG Hong-liang,ZHANG Jing,QIAO Xue-guang,WANG Yu. Study on strain and temperature cross sensitivity of fiber Bragg grating sensor[J]. Journal of Applied Optics, 2008, 29(5): 804-807 | |
| Authors: | WANG Hong-liang ZHANG Jing QIAO Xue-guang WANG Yu |
| Affiliation: | Key Laboratory of Photoelectric Gas-oil Logging and Detecting Ministry of Education, Xi′an Shiyou University, Xi′an 710065, China |
| Abstract: | The cross sensitivity of strain and temperature is a key problem for fiber Bragg grating (FBG) sensors. Based on the physical mechanism of the strain and temperature cross sensitivity,several schemes for the discrimination measurement of temperature and strain are presented. They are dual-wavelength matrix,two FBGs with different cladding diameters and chirped Bragg grating techniques. Based on dual-wavelength matrix technique,a new structure of FBG sensor based on an elastic strain-sensitive element is proposed. Simultaneous discrimination measurements of the pressure and temperature are demonstrated in 20 MPa and 150 ℃,and its temperature sensitivity is 0. 02 nm/ ℃. |
| Keywords: | fiber Bragg grating (FBG) cross-sensitivity discrimination measurement |
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