MULTI-AXIS STRAIN STATE SENSOR BASED ON OPTICAL FIBER TECHNOLOGY

T. Rossmanith, X. D. Jin, J. S. Sirkis

Abstract

This paper describes a single micro-optical fiber sensor capable of measuring four strains simultaneously in a composite structure. This single transducer is based on cascading four micro Fabry-Pérot cavities to measure three normal strains and one shear strain in the plane of the optical fiber cross-section. The development of the sensor fabrication and signal processing techniques are discussed. This fabrication includes designing and fabricating new optical fibers, optical fiber circuits, and an optical fiber multi-strain sensor head. This paper presents 2D and 3D finite element analysis to establish the transformation between fiber core and composite host strain states.

Keywords

optical fiber three-strain sensor, Fabry-Pérot Interferometer, path matched differential interferometry, finite element analysis, micromechanics analysis

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IMEKO-WC-2000-TC7-P204.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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