BRIDGE STRUCTURE MONITORING SYSTEM BASED ON THE FBG SENSOR NETWORK

This study is to address a bridge structure monitoring system based on a fiber communication network and fiber optic sensor network. The applied optical fiber sensor deployed the FBG (Fiber Bragg Grating) type, which makes it possible to measure multiple points from one cable. Since the fiber sensor uses the principle of light, it features some advantages in that it is not influenced by electromagnetic waves and it provides excellent durability. The data obtained from the measuring results of the bridge structure measuring system are designed to be transferred to the applicable maintenance control office via the pre-established fiber communication network. Pre-investigation results indicated that it is possible to effectively construct a structure safety management network based on the optical communication network and fiber bragg grating sensor system. It is anticipated that the data transmission methodology using the optical communication network will be effectively applied into the measurement of other major infrastructures based on this methodology.