| 光纤裂缝传感器中裂缝宽度与光纤损耗关系分析 |
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| 引用本文： | 江毅,Leung K.Y.Christopher.光纤裂缝传感器中裂缝宽度与光纤损耗关系分析[J].北京理工大学学报,2003,23(4):492-495. |
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| 作者姓名： | 江毅 Leung K.Y.Christopher |
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| 作者单位： | 1. 北京理工大学,信息科学技术学院光电工程系,北京,100081
2. 香港科技大学,土木工程系,香港 |
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| 基金项目： | 香港研究资助局资助项目;HKUST6132/98E; |
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| 摘 要： | 为了从理论上获得光纤裂缝传感器的性能。简化传感器的设计，用光射线理论分析了多模光纤的弯曲损耗，获得了混凝土裂缝宽度与光功率损耗之间的关系。并编程计算了传感器的裂缝宽度与光纤损耗的关系，光纤与裂缝的夹角对传感器性能的影响，以及改变光纤的数值孔径对传感器性能的影响．理论分析结果与实验结果吻合。
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| 关 键 词： | 光纤传感器 损耗 混凝土 裂缝宽度 |
| 文章编号： | 1001-0645(2003)04-0492-04 |
| 收稿时间： | 4/3/2003 12:00:00 AM |
Relationship Between the Crack Width and the Loss in Optical Fiber in Fiber Optical Crack Sensors |
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| JIANG Yi and Leung K.Y. Christopher.Relationship Between the Crack Width and the Loss in Optical Fiber in Fiber Optical Crack Sensors[J].Journal of Beijing Institute of Technology(Natural Science Edition),2003,23(4):492-495. |
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| Authors: | JIANG Yi and Leung KY Christopher |
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| Institution: | Department of Optical Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China;Department of Civil Engineering, Hongkong University of Science and Technology, Hongkong, China |
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| Abstract: | To obtain the characteristics of fiber optical crack sensors and to simplify their design, the bend loss of multiple mode optical fiber is analyzed using the ray theory. Several important parameters are calculated: relationship between the crack width and the optical loss, influence of the angle between the fiber and crack, the influence of numerical aperture to sensors. The theoretical analysis accords well with the experiment results. |
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| Keywords: | fiber optical sensor loss concrete crack width |
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