FIELD: measuring technology.
SUBSTANCE: invention can be used to measure movement in explosive and harsh production and operating conditions. A digital fibre-optic displacement sensor contains a multi-pole magnetic ruler and a reading module in the form of a housing made of non-magnetic material, placed in a magnetic field and configured to move relative to each other. The reading module has a guide groove in which a section of optical fibre with magnetically sensitive elements and at least one intra-fibre Bragg grating is located; the section of the optical fibre is made in the form of a contour consisting of m turns (m=10…20), and the reading module is installed in such a way with respect to the magnetic ruler that the magnetic field is directed orthogonal to the fibre axis.
EFFECT: improved sensitivity of the fibre-optic displacement sensor to the current electromagnetic field.
1 cl, 4 dwg
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