FIELD: measurement.
SUBSTANCE: invention relates to fibre-optic measuring equipment and can be used to measure displacement in explosive and harsh conditions of production and operation. Fibre-optic displacement sensor comprises an intra-fibre Bragg grating, according to the invention, on an optical fibre in which a Bragg grating is placed, on both sides of the Bragg grating there are cylindrical magnets with holes located along their axis, optical fibre is stretched through these holes, and also the optical fibre is fixed in one of two air gaps of the magnetic conductor so that in the second air gap of this magnetic conductor perpendicular to the plane of location of the optical fibre and the magnetic conductor, a shaped magnetic conductor moves, at one end of which a cylindrical magnet is installed.
EFFECT: simplified manufacturing and possibility to use sensor as control element in spark-proof places.
1 cl, 2 dwg
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