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Selected Applications of Fiber-Optic Sensors Based on Highly Birefringent Fibers in Engineering Mechanics

  • Wojtek J. Bock
  • Waclaw Urbanczyk
  • Marc R. H. Voet

Abstract

The need for fiber-optic sensor (FOS) technology in the broad area of engineering mechanics is now well documented. Civil engineering structures such as highway and railway bridges, dams, tunnels, large buildings and underground mines must resist environmental and in-service loads due to winds, earthquakes, traffic, thermal effects, construction or environmental damage. For safety and maintenance purposes their response must be carefully monitored. This information is needed to assess their overall “health” and to increase engineering knowledge for future projects. Pressure and strain gauges, accelerometers and tiltmeters are among the variety of electrical and non-electrical transducers which can be directly embedded in concrete, earth, rock, borehole or tunnel lining to sense and monitor structural loads and responses. None are well suited to more demanding civil engineering environments. Non-electrical hydraulic devices are costly in terms of labour-intensive inspection, maintenance and repairs; they are difficult to multiplex and impossible to use for dynamic measurements. Electrical measuring devices are out of the question in open-air structures (risk of lightning), and in mining environments (risk of explosion). For these applications fiber-optic sensors offer significant metrological improvement: electrical passivity, high bandwidth, safety in corrosive or explosive environments, immunity to EMI, high sensitivity, miniature dimensions, possibility of remote operation and direct compatibility with increasingly present fiber-optic data transmission networks.

Keywords

Pressure Sensor Pressure Cell Tunnel Lining Polarization Mode Dispersion Highly Birefringent 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Wojtek J. Bock
    • 1
  • Waclaw Urbanczyk
    • 2
  • Marc R. H. Voet
    • 3
  1. 1.Laboratoire d’optoélectronique industrielleUniversité du Québec à HullHullCanada
  2. 2.Institute of PhysicsWroclaw University of TechnologyWroclawPoland
  3. 3.Glötzl GmbHRheinstettenGermany

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