System for optical fiber strain measure

• Main Authors: INTERMITE ANGELA, RADISAVLJEVIC BRANIMIR, DABBICCO MAURIZIO, SCAMARCIO GAETANO, OTTONELLI SIMONA
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2014
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

A system is described for the measure of the strain of an object. The measurement system includes a laser source for generating an output radiation, includes a strainable optical fiber having a first and a second facet, wherein the first facet is coupled to the laser source for receiving at least part of the output radiation and for transmitting therefrom a guided radiation over the optical fiber towards the second facet, and includes means for calculating a measure of the strain of at least part of the optical fiber. The at least part of the optical fiber includes a first section and a second section, wherein the second section is movable by the strain of the at least part of the optical fiber according to a linear displacement of the second section respect to the first section along the at least part of the optical fiber. The second facet is adapted to receive the guided radiation and to reflect therefrom a corresponding reflected radiation towards the first facet. The laser source is a self-mixing type whi