METHOD OF DIAGNOSING HIDDEN DEFECTS ON EQUIPMENT AND PIPES Russian patent published in 2011 - IPC G01M7/02 

FIELD: physics.

SUBSTANCE: in the method of diagnosing hidden defects of equipment and pipes, involving physical action on the diagnosed object, mechanical sinusoidal action is first applied to the object with frequency which varies with time until local mechanical resonance, amplitude distribution of vibration displacement of surface layers of the object during resonant vibrations of the entire surface of the object under observation is measured using holographic interferometry and speckle interferometry; presence of one or more field irregularities of the amplitude of vibration displacements in different zones of said surface is detected by comparing the frequency and form of vibrations of the object with a defect and frequencies and forms of vibrations of the flawless object at the same resonances, and if the approach of interference fringes or isolines of vibration displacements or violation of their monotony or presence of fractures therein, a hidden defect is present.

EFFECT: high accuracy and shorter time for simultaneous remote diagnosis of the entire volume of the object which is not available for direct contact during use.

6 dwg