DEVICE FOR NON-CONTACT DETERMINATION OF CONDUCTOR TEMPERATURE, THROUGH WHICH CURRENT FLOWS Russian patent published in 2019 - IPC G01J5/08 G01J5/10 G01R31/02 

FIELD: monitoring and measuring equipment.

SUBSTANCE: invention relates to the field of control and tests for testing systems containing dangerous circuits of electric-ignition devices (EID), resistance to effect of both pulsed and permanent external electromagnetic fields (EMF) and lightning discharges. Disclosed is a device for contactless determination of conductor temperature, through which current flows, comprising a body of a EID, in which there is a filament with contacts serving to connect the EID to the hazardous circuit, an optical sensitive element mounted on a dielectric retainer, a light detector, a digital oscilloscope, a portable computer and a pulse and direct current generator. Optical sensing element is made in the form of multi-core fiber-optic line, one of which ends is made in the form of cylindrical window, in which the optical cores are oriented along the radius of the cylindrical window enveloping the filament to remove the optical signal from the filament, and the second end terminal having a flat end is connected to the light detector. At the same time the terminator of a multicore fiber-optic line in the form of a cylindrical window is installed near the filament with a gap of not less than 0.5 mm, and in order to ensure unobstructed installation, this terminal is detachable. Besides, the area occupied by the fiber-optic fibers of the cylindrical window is not less than 95 % of the window cross-section at the number of fibers from 1800, which leads to multiple increase in the measurement sensitivity as compared to the single optical fiber, and the rest section is taken by the gluing thread composition.

EFFECT: high sensitivity of measurements by increasing heat flux from the filament, light flux by increasing the area of energy absorption from the filament, high accuracy of measurements owing to complete absence of influence on filament temperature and complete absence of noise-bearing communication lines.

4 cl, 4 dwg