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| 基于平膜片和悬臂梁的光纤光栅压力响应特性研究 |
| Pressure response of fiber Bragg grating based on plate diaphragm and equal-strength cantilever |
| 投稿时间：2014-02-28 |
| DOI：10.3969/j.issn.1005-5630.2014.04.012 |
| 中文关键词: 光纤光栅 透射谱 压力传感 |
| 英文关键词:fiber Bragg grating transmission spectrum pressure sensing |
| 基金项目:国家自然科学基金资助项目（51374072） |
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| 中文摘要: |
| 提出一种基于平膜片和等强度悬臂梁的组合式光纤光栅压力传感结构，应用材料力学和耦合模原理，分析得出了粘贴在悬臂梁上的双光纤光栅的中心波长偏移量与外界均匀压力成正比的结论，并应用软件仿真模拟了基模谐振波长的压力漂移特性.结果表明：布拉格谐振波长随压力线性增长，双光栅的组合使用，提高了测量灵敏度，解决了温度交叉敏感问题，这一结论对光纤光栅的生产和应用有一定的指导作用. |
| 英文摘要: |
| A compounding pressure sensing structure of fiber Bragg grating (FBG) based on circular plate diaphragm and equal-strength cantilever is proposed. Based on mechanics of materials principle and mode coupling theory, a liner relation expression between the uniform pressure and the central wavelength shift of double grating fixed on the surface of the cantilever is achieved. The pressure shift of fundamental modes resonance wavelength is investigated by means of simulation. The results show that the resonance wavelengths are linearly increased with the surrounding pressure. The sensitivity to the pressure is obviously enhanced and temperature crossing sensitivity problem is solved with the double grating combination. This conclusion is of a great aid to the application of the fiber Bragg grating. |
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