The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2009
Filed:
Mar. 24, 2004
Philippe Delmas, Fontenay le Fleury, FR;
Alain Nancey, Boissy l'Aillerie, FR;
Marc Voet, Geel, BE;
Johan Vlekken, Diepenbeek, BE;
Els Schoubs, Rotselaar, BE;
Philippe Delmas, Fontenay le Fleury, FR;
Alain Nancey, Boissy l'Aillerie, FR;
Marc Voet, Geel, BE;
Johan Vlekken, Diepenbeek, BE;
Els Schoubs, Rotselaar, BE;
Ten Cate Geosynthetics France, Bezons, FR;
Fiber Optic Sensors & Sensing Systems, Geel, BE;
Abstract
A process for locating and measuring deformation in a civil engineering structure wherein at least one geosynthetic fabric () containing a plurality of optical fibers (to) in parallel and capable of transmitting signals is applied in the structure or under the structure. The optical fibers contain Bragg gratings (), evenly spaced in series () of Nconsecutive gratings that correspond to the same wavelength. The series is distributed in identical sets, each of which contains Nconsecutive series that correspond to the different wavelengths, and, in at least two optical fibers, the numbers Nof gratings of a series and the numbers Nof series () of a set () are determined to locate the deformations to which the structure is subjected on the one hand and, on the other, to measure the elongation of the said optical fibers where the deformation occurs.