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| 岩层变形检测的光纤光栅多点传感理论与工程应用 | |
| 引用本文： | 刘金碹,柴敬,朱磊,张广文,杨建华,王振平.岩层变形检测的光纤光栅多点传感理论与工程应用[J].光学学报,2008,28(11):2143-2147. |
| 作者姓名： | 刘金碹 柴敬 朱磊 张广文 杨建华 王振平 |
| 作者单位： | 1. 西安科技大学能源学院,陕西西安,710054 2. 西安科技大学能源学院,陕西西安710054;教育部西部矿井开采与灾害防治重点实验室,陕西西安710054 3. 兖州煤业股份有限公司,山东邹城,273500 |
| 基金项目： | 国家自然科学基金，陕西省岩层控制重点实验室项目 |
| 摘 要： | 为了监测松散地层沉降变形,提出了一种用于钻孔中植入式光纤Bragg光栅传感器(FBG)的结构和传感网络系统.基于室内实验结果,给出了用于岩层变形检测的传感光栅波长带宽为6 nm,分析了多点传感信号分辨因子,山光源带宽决定的测试系统最大实际复用能力为6个传感器.设计并实现了一个由18个光纤光栅组成的具有特色的光纤Bragg光栅波分复用/空分复用混合阵列.工程实践表明,光纤光栅传感系统采用双同路布置.可提高系统下放后光纤光栅传感器的成活率. |
| 关 键 词： | 光纤光学 岩层变形 多点传感 光纤光栅传感器 监测 |
| 收稿时间： | 2008/1/30 |
Theory of Fiber Bragg Grating Multi-Point Sensing of Rock Deformation and Its Engineering Application |
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| Liu Jinxuan,Chai Jing,Zhu Lei,Zhang Guangwen,Yang Jianhua,Wang Zhenping.Theory of Fiber Bragg Grating Multi-Point Sensing of Rock Deformation and Its Engineering Application[J].Acta Optica Sinica,2008,28(11):2143-2147. | |
| Authors: | Liu Jinxuan Chai Jing Zhu Lei Zhang Guangwen Yang Jianhua Wang Zhenping |
| Abstract: | In order to monitor the subsidence and deformation of the unconsolidated strata, a monitoring structure with fiber Bragg grating (FBG) sensors embedded in the borehole and the sensing network system are proposed. With the results from laboratory, the 6 nm wavelength bandwidth of the FBG sensors used for rock strata deformation monitoring is presented. By analyzing the signal resolution factor of the multi-point sensor, the maximum practical six-channel multiplexing of the testing system determined by dominated optical source bandwidth has been researched. A distinctive FBG array composed of 18 FBGs based on wavelength division multiplexing/spatial division multiplexing is designed and implemented. Engineering practice shows the double-loop design can improve the survival rate of FBGs in mines. |
| Keywords: | fiber optics rock deformation multi-point sensing fiber grating sensor monitoring |
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