FIBER OPTICAL THERMOMETER Russian patent published in 2018 - IPC G01K11/32 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the measurement of temperature in areas with strong electromagnetic interference, in areas of high explosive and fire hazard, when measuring under high voltage and in other conditions where it is inadmissible to use standard electronic means for monitoring the temperature state, namely to systems for monitoring the temperature state in medicine, at power supply facilities, engineering facilities. Fiber-optic thermometer contains an optical splitter, the input and output of which are respectively connected by optical fibers to the third output of the light distribution system and to each fiber-optic sensor, and in each fiber optic sensor a second Bragg fiber grating with at least two phase shifts is recorded before the fiber optical fiber recorded at the end of the first Bragg fiber grating. In a fiber optic thermometer in each fiber optic sensor, the first Bragg fiber grating can be recorded either as an extension of a second Bragg fiber grating, then the sensor design is in the form of a probe or at a distance from the second Bragg fiber grating, allowing the loop to be folded and the first Bragg fiber grating to be placed in direct contact with the second, fixing them on the tip of datum plane or volumetric shape, then the sensor design has an annular appearance.

EFFECT: increasing sensitivity of measurements.

5 cl, 5 dwg