| 题名 | 高速光纤布拉格光栅传感器解调系统研究 |
| 作者 | 韩悦 |
| 学位类别 | 硕士 |
| 答辩日期 | 2008 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 林尊琪 |
| 关键词 | 光纤布拉格光栅，传感，解调电路，数据处理 |
| 其他题名 | Research and design of high-speed demodulation system of fiber Bragg grating sensor system |
| 中文摘要 | 光纤传感器作为一种新型传感器，以其信息容量大、抗电磁干扰强和易于组建传感网络，受到了国内外工程界的广泛关注和研究。光纤布拉格光栅(Fiber Bragg Grating, FBG)传感器以其传感头小、灵敏度高、精度高和易进行分布式测量，成为一种迅速发展的光纤传感器，已被应用于桥梁、隧道等建筑结构的应变变形、温度预警等安全监测中，即对静态及低速信号的监测。为拓宽应用，实现对动态信号的监测，需要设计高速FBG传感器及解调系统，以达到诸如对大型工程设备安全工作的监测等应用。 本论文针对上海市科委项目“现代船舶嵌入式光纤传感系统关键成套技术和装备研究”（07DZ220022）进行相关技术研究。由于舰船上的特殊环境，传统的机电类传感器及现有的低速FBG传感设备无法满足要求，因此需要研究设计高速FBG传感器及解调系统，以实现对舰船内关键设备工作状态的监测确保其安全运行。论文首先全面了解FBG传感器的相关技术和发展概况，对其传感原理进行了理论分析，对现行几种解调方案进行了讨论。然后介绍了本课题采用的基于可调谐光纤F-P滤波器的解调方案，设计和实现了其中的电子学功能模块，主要包括高压高精度锯齿波驱动电路、TEC温控电路、高速高精度光电转换电路。最后提出了基于高斯拟合的解调算法对采集到的传感信号数据进行处理。 |
| 英文摘要 | Optical fiber sensors as a new sort of sensors have been extensively researched both at home and abroad due to their large information capacity, immunity to electromagnetic interference, easily being constructed to sensor system and so on. As one member of these sensors, fiber Bragg grating(FBG) sensor has been developed faster in virtue of its compact size, high sensitivity, high precision and good performance in distributed measurement and been already applied in strain and temperature measurement of large-scale structures such as dams, bridges and tunnels, which belong to low-speed signal measurement. To broaden the potential use for high-speed signal measurement, high-speed FBG sensor system should be designed to measure the working conditions of large equipments. This thesis is connected with the project of Key Technique and Equipment Research of Embedded Optical Fiber Sensor System for Modern Ships which is supported by Science and Technology Commission of Shanghai Municipality. Traditional sensors and low-speed FBG sensors existed cannot fulfill the needs here because of the complicated environment in the ship, so high-speed FBG sensor system and demodulation system need to be designed to achieve the measurement of key ship equipment and assure its safe condition. The technique and development of FBG sensor have been discussed at the beginning in this thesis, including theoretic analyses of FBG sensing mechanism and demodulation schemes. Then a demodulation scheme based on tunable fiber F-P filter has been proposed and the electronic system has been designed which mainly includes high-voltage and high-precision sawtooth generation circuit, TEC temperature controlling circuit, high-speed and high-precision photoelectric conversion circuit. At last part a demodulation algorithm based on Gaussian curve fitting has been put forward to process acquired data. |
| 语种 | 中文 |
| 内容类型 | 学位论文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16402]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 韩悦. 高速光纤布拉格光栅传感器解调系统研究[D]. 中国科学院上海光学精密机械研究所. 2008. |
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