FIBRE-OPTIC SYSTEM AND MEASUREMENT OF TURBO MACHINE SYSTEM PARAMETERS Russian patent published in 2014 - IPC G01L1/24 G01H9/00 G01M11/08 

FIELD: engines and pumps.

SUBSTANCE: proposed system comprises light source to transmit light onto shaft surface via multiple optic fibres made at multiple points nearby said surface in, in fact, axial direction between the ends of at least one shaft, high-temperature reflection probe built around fibre bundle to detect light reflected from shaft surface and mechanism to measure torque or oscillation at the shaft. The latter comprise coding mechanism composed of changed texture shaped to wedge-like groove on shaft surface of variable depth. Said depth generates the front and rear working point signals so that appropriate time delay can be detected from whatever two positions of said groove for determination of shaft twist angle by differentiation of reflection pattern characteristics during every rotation cycle.

EFFECT: higher precision of measurements.

23 cl, 24 dwg