Method for locating and measuring deformations in a work of civil engineering
US7532780B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 24, 2004 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Mar 24, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process for locating and measuring deformation in a civil engineering structure wherein at least one geosynthetic fabric (1) containing a plurality of optical fibers (2a to 2e) in parallel and capable of transmitting signals is applied in the structure or under the structure. The optical fibers contain Bragg gratings (3), evenly spaced in series (4) of N1 consecutive gratings that correspond to the same wavelength. The series is distributed in identical sets, each of which contains N2 consecutive series that correspond to the different wavelengths, and, in at least two optical fibers, the numbers N1 of gratings of a series and the numbers N2 of series (4) of a set (5) 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.