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Moire-Fringe-Based Fiber Optic Tiltmeter for Structural Health Monitoring  

Kim, Dae-Hyun (Dept. of Mechanical Engineering, Seoul National of Technology)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.28, no.2, 2008 , pp. 157-163 More about this Journal
Abstract
This paper presents a novel fiber optic tiltmeter system for the health monitoring of large-size structures. The system is composed of a sensor head, a light control unit and a signal processing unit. The sensing mechanism of the sensor head is based on a novel integration of the moire fringe phenomenon with fiber optics to achieve a robust performance in addition to its immunity to EM interference, easy ratting, and low cost. In this paper, a prototype of the fiber optic tiltmeter system has been developed successfully. A low-cost light control unit has been developed to drive the system's optic and electronic components. From an experimental test, the fiber optic tiltmeter is proven to be a prospective sensor for the monitoring of the tilting angle of civil structure with a good linearity. Finally, the test also successfully demonstrates the performance and the potential of the novel fiber optic tiltmeter system to monitor the health of civil infrastructures.
Keywords
Fiber Optic Tiltmeter; Structural Health Monitoring$Moir\acute{e}$ Fringe;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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