FLAW DETECTOR FOR WELDS Russian patent published in 2017 - IPC G01N27/90 

FIELD: physics.

SUBSTANCE: flaw detector includes hardware and software. The flaw detector contains additional operating units: generation, filtering, signal processing. The generating unit controls the generator and transmits the integrated and amplified signals to the exciter coils of the eddy current converters, which create an electromagnetic field that induces eddy currents in the electrically conductive monitoring object. When a defect is detected, the field changes and changes the voltage and the output voltage difference of the measuring coils of the converters. The voltage difference in the form of a signal carries information about the defects of the monitoring object. The signal passes through the amplification unit and the filtering unit, which are controlled by the software filtration unit associated with the software generation unit. The change in the filtering frequency occurs simultaneously with the change in the generation frequency. The signal is transmitted to the amplitude detector, through the analogue-to-digital converter to the software signal processing unit and the measurement results are output to the personal computer screen.

EFFECT: detection of defects in small-sized welds at a large depth in the metal against the background of a signal from natural macrostructural inhomogeneities.

3 ex, 12 dwg