Multiplexed optical fiber sensor system for distributed measurement of structural strains

Document Type

Conference Proceeding

Publication Date

1-1-1998

Abstract

Structurally integrated optical fiber sensors form the basis for smart structure technology. Over the past decade a variety of sensor configurations have been developed for measurement of strains and deformations in structures. Strains and deformations alter the refractive index and the geometry of the optical fiber material. These changes perturb the intensity, phase, and polarization of the light-wave propagating along the probing fiber. The optical perturbations are detected for the determination of strain. The research presented here describes the development of a new optical fiber sensor system for measurement of structural strains based on white light interferometry. An optical switch provides for multiplexing of strain signals from various locations in the structure. Redundant Bragg grating type fiber optic sensors as well as strain gauges were employed for comparison and verification of strain signals as measured by the new system. The system provides capability for distributed sensing of strains in large structures.

Identifier

0031621406 (Scopus)

Publication Title

Materials Research Society Symposium Proceedings

ISSN

02729172

First Page

119

Last Page

130

Volume

503

Grant

9402671

Fund Ref

National Science Foundation

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