A Novel Self-Healing Optical Fiber Network

Abstract:

The safety and reliability of critical civil infrastructures have been a major concern in all countries around the world. However, structural health monitoring (SHM) still faces a number of challenges, particularly in the area of in-and post-disaster monitoring. In addition, due to the large scale in dimension and complexity in geometry of a typical civil structure, a large number of embedded sensors are required to measure various structural and environmental parameters under normal and extreme conditions. To enhance the survivability of a sensor network for life-cycle structural health monitoring (SHM), this paper presents a novel self-healing sensor network. One Spider Orb-Web or network and one hybrid optical fiber (OF) system by combining the local and distributed OF technologies are designed to enhance the functionality of self-healing. Furthermore, three local self-healing sensor nodes, which use light switches or couplers, are designed to maintain the measuring connectivity at hot stress point. Finally, A simple Brillouin sensing network with self-healing nodes is constructed and then validated by the strain measurements of a three-point bend beam. The results show that by using self-healing sensors nodes, the stress state of the RC beam can be successively detected, even when some sensors fail or when the sensing line is broken.

• Periodical: Applied Mechanics and Materials (Volume 330)
• Pages: 553-560
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.330.553
• Online since: June 2013
• Authors: Zhi Zhou, Jian Ping He, Jin Ping Ou, Hai Xiao
• Keywords: Hybrid OF System, Optical Fiber Sensor (OFS), Self-Healing Optical Fiber-Sensing Network, Spider Orb-Web, Structural Health Monitoring (SHM)

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