Monitoring system for the displacement of the moveable end of a bridge using optical fiber sensors

Ki-Tae Park

doi:10.1117/12.807683

30 December 2008 Monitoring system for the displacement of the moveable end of a bridge using optical fiber sensors

Ki-Tae Park

Proceedings Volume 7268, Smart Structures, Devices, and Systems IV; 726811 (2008) https://doi.org/10.1117/12.807683
Event: SPIE Smart Materials, Nano- and Micro-Smart Systems, 2008, Melbourne, Australia

Abstract

The displacement of the moveable end bearing of a bridge is a very critical item that must be measured when evaluating the behavior of a bridge that might be affected by a falling deck or temperature variations, and the movement of the bearing shoe must be periodic monitored by maintenance personnel. But this type of monitoring method is inefficient since the maintenance personnel must perform the inspection in close proximity to the bridge substructure, which takes time and effort. So, for efficient maintenance, inspectors must be able to monitor the bearing shoe without proximity to substructure, which will necessitate the development of a reliable, movable end bearing monitoring system that is convenient for maintenance or monitoring personnel. However, with the existing system, the cabling is very complex and the noise affected by electromagnetic waves might occur. For this reason, this study was intended to develop the sensor system to monitor the displacement of the movable end bearing, using optical fiber sensor, which is durable and is not affected by electromagnetic waves. To that end, an optical fiber measuring device for monitoring the displacement of movable end bearing was developed, and a displacement-measuring algorithm, that uses measured data, was accordingly proposed. The monitoring system that was developed in the study is able to comprehensively collect the displacement data of the movable end bearing without the need to approach the substructure of the bridge by the maintenance personnel. Moreover, thanks to the high reliability of the data, it is expected to significantly enhance the work efficiency as well.

Citation Download Citation

Ki-Tae Park "Monitoring system for the displacement of the moveable end of a bridge using optical fiber sensors", Proc. SPIE 7268, Smart Structures, Devices, and Systems IV, 726811 (30 December 2008); https://doi.org/10.1117/12.807683

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KEYWORDS

Bridges

Sensors

Fiber Bragg gratings

Fiber optics sensors

Temperature metrology

Electromagnetic radiation

Optical fibers

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