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Proceedings Paper

Low-coherence sensors for the monitoring of underground works
Author(s): Daniele Inaudi; Laurent Vulliet; Leopold Pflug; Samuel Vurpillot; Annette Wyser
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Paper Abstract

Civil underground works offer good opportunities for fiber optic displacement sensors. This communication presents an overview of possible applications in this field. Low-coherence interferometry appears to be the ideal technique for the long-time monitoring of such structures. The principle of the portable measuring system developed at our institute and based on this technique is presented along with different possible multiplexing techniques. The presented experimental results confirm the precision of 10 micrometers found under laboratory conditions and the immunity to drift for at least one year. A description of the techniques used to install optical fibers in anchorage cables and piles, as well as the lessons learned from these field tests are also presented.

Paper Details

Date Published: 20 April 1995
PDF: 9 pages
Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); doi: 10.1117/12.207679
Show Author Affiliations
Daniele Inaudi, Swiss Federal Institute of Technology (Switzerland)
Laurent Vulliet, Swiss Federal Institute of Technology (Switzerland)
Leopold Pflug, Swiss Federal Institute of Technology (Switzerland)
Samuel Vurpillot, Swiss Federal Institute of Technology (Switzerland)
Annette Wyser, Swiss Federal Institute of Technology (Switzerland)


Published in SPIE Proceedings Vol. 2444:
Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation
William B. Spillman, Editor(s)

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