METHOD FOR NONDESTRUCTIVE RAPID INSPECTION OF WELD JOINTS AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2013 - IPC G01N21/88 G01B11/16 G01B9/25 

FIELD: physics.

SUBSTANCE: method involves investigating residual stress on a section within the investigated area of an object using speckle interferometry technology. Irradiation of a weld point with a heat-affected zone using a speckle interferometer and collection of fringe patterns are carried out during formation of the weld joint, using pressure drop during the period of cooling the weld point after obtaining said weld point, by twofold exposure in one cycle of making the next point of the weld joint. The apparatus has a radiation source - a single-frequency laser, a speckle interferometer, a device for contact welding and a recording device with a control panel. The speckle interferometer and the radiation source are in form of a module which operates in concert with contact welding electrodes in a cycle of making weld points.

EFFECT: wider technological capabilities, improved quality and shorter time for conducting nondestructive rapid inspection and low power consumption during said inspection.

2 cl, 1 dwg