ELECTROTHERMAL METHOD FOR DETECTING AND IDENTIFYING DEFECTS IN WALLS OF STRUCTURAL MEMBERS Russian patent published in 2015 - IPC G01N25/72 

FIELD: electricity.

SUBSTANCE: method includes two reference samples having a section identical by its material and dimensions with the tested section of structural member surface. At that section the first reference sample does not have defects, and to inner or outer surface of the second reference sample defects are applied step-by-step increasing in depth. Dimensions of the defects are entered into PC data bank. Outer surfaces of the tested structural member, of the first and second reference samples are conditioned and coating with even and high emissivity coefficient is applied. The first and second reference samples and tested section of the structural member are subject to thermal impact in the selected mode. Intensity of IR emission of outer surfaces at the tested sections is registered within the selected time intervals and saved in PC data bank. Then difference in intensity of IR emission is calculated for the respective selected time intervals for the first and second reference samples with their further comparison.

EFFECT: higher accuracy of obtained data.