Measurement of tunnel-ceiling and side-wall displacements using arc-shaped beam and fiber Bragg grating sensors

Hiroshi Naruse; Shinya Furukawa; Takanori Nishino

doi:10.1117/12.974833

17 October 2012 Measurement of tunnel-ceiling and side-wall displacements using arc-shaped beam and fiber Bragg grating sensors

Hiroshi Naruse, Shinya Furukawa, Takanori Nishino

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842133 (2012) https://doi.org/10.1117/12.974833
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A method is presented for measuring the displacement of a tunnel's ceiling and side walls using arc-shaped beams and fiber Bragg grating (FBG) sensors. The beams are installed inside the tunnel so that the displacements of the ceiling and side walls are transferred to the beams. The displacements are computed using mechanical analysis of the strains they produce on the surface of the beams. Table-top experiments demonstrated that the method is valid. This method can be used to construct a system for monitoring the displacements in tunnels with various cross-sections.

Citation Download Citation

Hiroshi Naruse, Shinya Furukawa, and Takanori Nishino "Measurement of tunnel-ceiling and side-wall displacements using arc-shaped beam and fiber Bragg grating sensors", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842133 (17 October 2012); https://doi.org/10.1117/12.974833

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