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结合无源光学器件,提出并设计了一种新型的高冗余光纤布拉格光栅(FBG)传感模块,并将设计的FBG传感模块与波分复用技术相结合,构建了高冗余FBG传感网络。以长方形铝合金板为研究对象,对高冗余FBG传感网络的可靠性进行研究,理论比较并实验分析了高冗余FBG传感阵列的适用性与可靠性。研究结果表明,利用光开关在传感阵列支路之间的切换,使得FBG传感网络更具有冗余性。这一方面能够解决使用过程中多个部位出现故障导致的某些FBG传感模块无法被计算机检测到的问题,有效提高了传感系统的可靠性、容错性;另一方面为工程应用中结构健康监测以及特殊部位监测提供了一种有效可行的监测手段。
Combined with passive optics, a novel high-redundancy fiber Bragg grating (FBG) sensing module is proposed and designed. The designed FBG sensing module and the WDM technology are combined to construct a highly redundant FBG Sensing network. Taking the rectangular aluminum alloy plate as the research object, the reliability of highly redundant FBG sensor networks is studied. The applicability and reliability of high redundancy FBG sensor arrays are compared and experimentally analyzed. The results show that the use of optical switches in the sensor array branch between the switch makes the FBG sensor network more redundant. On the one hand, the problem that some FBG sensing modules can not be detected by a computer caused by the failure of multiple parts during the use process can be solved, and the reliability and fault tolerance of the sensing system are effectively improved; on the other hand, the structure of the engineering application Health monitoring and special site monitoring provide an effective and viable means of monitoring.