FIBER-OPTIC CABLE FOR MEASUREMENT OF PRESSURE DISTRIBUTION, TEMPERATURE AND DEFORMATION Russian patent published in 2019 - IPC G01D5/353 

FIELD: fiber-optic cable.

SUBSTANCE: invention relates to a fiber-optic cable for measuring temperature, pressure and deformation. Fiber-optic cable for measuring pressure, temperature and deformation distributions comprises an inner layer formed of a metal tube protecting the optical fiber and metal wires supporting the optical fiber-protecting metal tube, wherein the optical fiber-protecting metal tube and the metal wires are coaxially arranged around the central axis of the fiber-optic cable. Note here that outer layer is formed of a plurality of metal wires arranged coaxially with inner layer to surround inner layer, wherein inner layer and outer layer are formed into multilayer multilayer structure, and multi-strand structure has sections of pressure blocking formed with intervals in axial direction of fiber-optic cable in order to block influence of pressure propagating in axial direction of fiber-optic cable. And the optical tube-protecting metal tube holds the optical fiber of the pressure sensor for measuring pressure distribution of the measurement object based on changes in the Brillouin scattering frequency and Rayleigh scattering of pulsed laser light introduced into the optical fiber of the sensor, and is formed with through holes.

EFFECT: high accuracy of measuring pressure.

6 cl, 12 dwg