Spider Orb-Web Inspired Cognitive, Fault-Tolerant Fiber Optic Sensor Network for SHM under Harsh Conditions

该奖项的研究目标是学习传感器制造方法，光学交叉连接架构，网络框架拓扑结构和系统自主性，这些都是在恶劣条件下创建用于结构健康监测的认知和容错光纤传感器网络所需的。该方法是检查和学习蜘蛛球网的独特的传感功能，制定关键的传感器和网络参数，并将这些知识应用到一个强大的光纤传感器网络的设计和演示。具体而言，一种新的方法将推导出用于制造鲁棒的光纤布拉格光栅传感器使用高重复率飞秒激光脉冲序列。 一种新的无损交叉连接器将被设计，使网状传感器网络。通过建立光网络拓扑结构的理论模型，得到了一种用于复用和组织大量传感器的容错网络管理方法。将研究泵浦和探测信号之间的相互作用，以找到一种用于快速和容错传感器询问的时域技术。如果成功，该研究将产生一种能够在恶劣条件下现场监测关键民用基础设施健康状况的传感技术。 这些研究将丰富国家安全运行监测技术的知识基础。民用基础设施，特别是在地震等极端事件期间改善关键任务服务和应急响应。该研究还将通过各种教育和推广活动，如本科和研究生课程的丰富，高级设计项目的支持，为7/8年级学生的动手研讨会，并推广到高中学生融入学术。

The research objective of this award is to learn the sensor fabrication method, the optical cross-connecting architecture, the network framework topology and the system autonomy that is required to create a cognitive and fault-tolerant fiber optic sensor network for structural health monitoring under harsh conditions. The approach is to examine and learn from the unique sensing features of the spider orb-web, formulate the critical sensor and network parameters, and apply this knowledge to the design and demonstration of a robust fiber optic sensor network. Specifically, a new method will be derived for fabrication of robust fiber Bragg grating sensors using high repetition rate femtosecond laser pulse trains. A new lossless cross-connector will be designed to enable the meshed sensor network. The theoretical model of the optical network topology will be established to obtain a fault-tolerant network management methodology for multiplexing and organizing a large number of sensors. The interactions between the pump and probe signals will be studied to find a time-domain technique for fast and fault-tolerant sensor interrogation.If successful, the research will result in an enabling sensing technology for in situ monitoring of the health status of critical civil infrastructure under harsh conditions. The studies will enrich the knowledge base of monitoring technologies for safe operation of the nation?s civil infrastructure, especially for improving mission-critical services and emergency responses during extreme events such as earthquakes. The research will also be integrated into academics through various educational and outreach actives such as undergraduate and graduate course enrichment, support of senior design projects, hands-on workshops for 7th/8th grade students, and outreach to high school students.