NON-DESTRUCTIVE EXAMINATION OF CURRENT-CARRYING CONNECTIONS SOLDERING Russian patent published in 2015 - IPC G01N27/90 

FIELD: electricity.

SUBSTANCE: soldering level is determined preliminary; to this end the first scale of eddy-current control device is calibrated using a sample simulating soldering level of 0%, wherein a gap between walls of flat-topped mandrel and copper plated inserted into it is soldered only at surface. At that sensitivity of eddy-current control device allows defining soldering level against dependence in the control device readings at movement of flat-topped converter at movement along the whole length of connection when impact of changes in outer cross-section impact on test results is reduced essentially. Then for the purpose of the second scale calibrating for the eddy-current control device a sample is used that simulates soldering level of 0% for this scale with a gap between walls of flat-topped mandrel and copper plate inserted into it and soldered to bigger depth (6.0-6.5 mm), at that sensitivity of the eddy-current control device is increased thus allowing essential increase in authenticity of soldering defects detecting for the tested connections in regard to preset level of soldering obtained at essential decrease in outer cross-section impact to test controls thus increasing authenticity for detection of soldering defects.

EFFECT: increased authenticity for detection of soldering defects in current-carrying cables.

7 dwg, 1 tbl