基于图论及应变花的光纤自诊断网络可靠性研究  

Studies on the Reliability of the Optic Fiber Self-diagnosing Network Based on the Graph Theory and Strain Rosette

作　　者：张晓丽[1] 乔月凤[1] 梁大开[2] 

机构地区：[1]信阳师范学院物理电子工程学院,河南信阳464000 [2]南京航空航天大学机械结构力学及控制国家重点实验室,江苏南京210016

出　　处：《信阳师范学院学报（自然科学版）》2013年第4期581-586,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(51275239);国家自然科学基金国际交流项目(51161120326);博士学科点专项科研基金(20123218110003);江苏省科技支撑计划项目(BE2011181);航空基金项目(2011ZA52013;20125652055);江苏高校优势学科建设工程资助项目;河南省教育厅科学技术研究重点项目(13A510770)

摘　　要：以某飞机机翼盒段上布置的对结构应变分布进行监测的光纤Bragg光栅自诊断传感网络为例,对提高光纤自诊断网络系统的可靠性方法进行了研究.在传感器排布方式上,对监测点采用光纤应变花的形式;在网络连接上,采用图论中邻接矩阵的方法通过使光开关动作为失效传感器寻找新的解调路径,实现信号的重新解调.结果表明,采用图论中对邻接矩阵的运算同传感器容错技术相结合,可使光纤网络系统在一根或几根传感器信号同时失效时,在不破坏结构的前提下,仍能利用受损区域内存活的光纤传感器,完成自诊断网络的自修复,达到提高网络可靠性的要求.For improving the reliability of the optic fiber self-diagnosing system, a Fiber Bragg Grating sensor net- work which is applied to monitor the strain distribution of a certain aircraft wing box is researched. Considering the sen- sor arrangement, the optic fiber strain rosette is adopted in the monitoring point. Considering the network connecting type, the optical switch and the adjacent matrix of the graph theory is adopted to connect the demodulation equipment for the disabled sensor signal in a different path once more, thus the disabled sensor signal can be demodulated again in the optic fiber sensor network. The research results indicate that if one or more sensor signals in the optic fiber net- work system disabled simultaneously, depending on the healthy Fiber Bragg Grating sensor in the damaged regions, the adjacent matrix of the graph theory combining with the fault-tolerant technique can be adopted to achieve the self-recov- ery of the self-diagnosing sensor network without damaging the structure.

关 键 词：光纤自诊断网络 光纤应变花 图论 自修复 可靠性 

分 类 号：TN711.1[电子电信—电路与系统] TN711.6