SUPERCONDUCTING WIRE NON-DESTRUCTIVE EXAMINATION METHOD Russian patent published in 2017 - IPC G01N27/90 

FIELD: electricity.

SUBSTANCE: measurement method of the ratio Cu/non Cu in the superconducting wire with the prescribed outside diameter D_O, specific conductance σ_c of the cooper cover and specific conductance σ_s of the superconductive core resides in the fact that the test samples, comprised of the section wires, are inserted in advance one-by-one into the cavity of the passing through eddy-current converter. These test samples have the same parameters D_O, σ_c and σ_s, as the manageable wire has, and the known, changing from the sample to the sample ratio Cu/non Cu. One measures the input by the samples eddy-current signal with the help of the electronic unit, which is plugged into the eddy-current converter output, and, in conjunction with the measurement, obtains the calibration relationship between the eddy-current signal and the ratio Cu/non Cu. The manageable wire is moved through the passing through eddy-current converter, the eddy-current signal is measured with the help of the electronic unit, which is connected to the eddy-current converter output, the current line coordinate of the wire manageable section is registered by dint of the movement sensor, the dependency of the eddy-current signal change is obtained along the manageable wire, and the ratio Cu/non Cu is also obtained with respect to this dependency with the help of the preliminarily received calibration curve. In obedience to the invention, one carries out the control measurement of the ratio Cu/non Cu by virtue of the electrical method on a periodic basis. For doing this, one generates the electric current l along the manageable wire section, measures the generated by this current decrease in current U at a section of the specified length ℓ, and estimates the average ratio Cu/non Cu at this section with account of the parameters D_O, σ_c, σ_s and ℓ in respect to the ratio U/I. Then one puts the obtained value Cu/non Cu in correspondence with the average value of the eddy-current signal, which is measured at the same section, and one corrects the calibration curve according to the obtained correspondence.

EFFECT: making it possible to enhance the measurement reliability.

2 cl, 1 dwg