Structural monitoring system using fiber optics

Details Structural monitoring system using fiber optics Structural monitoring system using fiber optics

G - Physics

08

C

340/136

G08C 21/00 (2006.01)

Patent

CA 1241086

M-2300 STRUCTURAL MONITORING SYSTEM USING FIBER OPTICS ABSTRACT An optical fiber is securely and continuously fastened to a structure such as a pipeline, offshore platform, bridge, building, dam or even a natural object. A light signal is passed into one end of the optical fiber. Any physical movement of the structure, or sectional movements along the optical fiber path, such as deflection, bending, displacement (changes in linear uniformity) or fracture of the structure will necessarily affect the optical fiber. As a consequence, detectable changes will occur in the "electro-optic signature" (for measurements made at the input end of the optical fiber) or in the light signal transmission (for measurements made at the opposite end of the optical fiber). Such measurements can be periodically or continuously made to determine the magnitude and location of physical movement of the structure. An addition, by utilizing additional optical fibers, the direction of such physical movement can be determined. The optical fiber itself can be used as a communication link for the transmission of data and voice.

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