Optical strain gauge comprising a fibre Bragg grating

The invention relates to an optical strain gauge using a glass fibre (1) comprising a Bragg grating (2). The glass fibre is coated with a sheath (3) consisting of polyether ether ketone with an admixture of at least 10 weight percent and a maximum of 40 weight percent of an inorganic filler, with a...

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Bibliographische Detailangaben
Hauptverfasser:	KREUZER MANFRED, SCHULZ RUDOLF, GUENTHER BERND, HAASE KARL-HEINZ, RUPPIN HAGEN, KIPP TOBIAS, MAUL JOCHEN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	MEASURING MEASURING ANGLES MEASURING AREAS MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS TESTING
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Beschreibung
Zusammenfassung:	The invention relates to an optical strain gauge using a glass fibre (1) comprising a Bragg grating (2). The glass fibre is coated with a sheath (3) consisting of polyether ether ketone with an admixture of at least 10 weight percent and a maximum of 40 weight percent of an inorganic filler, with a particle size of between 0.08 [mu]m and 12 [mu]m. The outer diameter of the sheath (3) is between 0.2 mm and 1.2 mm. The ratio D/d between the outer diameter D of the sheath (3) and the diameter d of the glass fibre (1) is between 2 and 6. A pressure of the sheath (3) on the glass fibre (1) is such that essentially no relative movement can occur between the glass fibre (1) and the sheath (3).