A fiber-optic tiltmeter system based on the moire-fringe effect

作者：Kim Dae Hyun^*

来源：Measurement Science and Technology, 2009, 20(2): 025203.

DOI：10.1088/0957-0233/20/2/025203

• moire fringe
• fiber optic
• tiltmeter
• monitoring
• civil structure

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 an integration of the moire-fringe phenomenon with fiber optics to achieve a robust performance in addition to its immunity to EM interference, easy cabling and low cost. In this paper, a prototype of the fiber-optic tiltmeter system has been developed successfully. From an experimental test, the fiber-optic tiltmeter was proven to be a prospective sensor for the monitoring of the tilt angle of a civil structure with good stability and 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 structures.

• 出版日期2009-2