FIBRE-OPTIC SENSOR (VERSIONS) Russian patent published in 2010 - IPC G01D5/353 G01K11/32 G01L11/02 

FIELD: physics.

SUBSTANCE: fibre-optic temperature sensor has a capillary inside of which there is optical fibre and a light-reflecting element which is placed at a distance from the butt end of the optical fibre. According to the first version, the sensor has a housing with a through hole and two blind holes coaxial with the through hole. In one of the blind openings there is a thread for a screw whose end is inserted into the through hole and has a light-reflecting butt end. In the opposite threaded blind hole there is an iron ring rigidly attached to the housing with a capillary inside which is also inside the through hole. According to the second version, the fibre-optic temperature sensor has a housing with a through hole and two blind holes coaxial with it. In each of the blind holes there is an iron ring with a capillary inside, where the capillary is also inside the through hole. One of the iron rings is rigidly attached to the housing. According to the third version, a fibre-optic deformation sensor has capillary inside of which there is an optical fibre and a light-reflecting element which is fitted at a distance from the butt end of the optical fibre. The sensor has a dumbbell shaped housing with cylindrical outer surfaces. On the surfaces of the ends of the housing there are threads, with a right-handed thread on one end and a left-handed on the other.

EFFECT: increased measurement accuracy, protection of the sensor from external mechanical effects, possibility of attaching the housing of the sensor to measurement objects, shorter time for transfer of temperature from objects to sensor elements and transfer of deformation of the material of objects to active elements of the sensor.

17 cl, 5 dwg