METHOD OF MONITORING MECHANICAL PROPERTIES OF STEEL STRUCTURES AND ELASTIC STRESS THEREIN AND DEVICE FOR REALISING SAID METHOD Russian patent published in 2011 - IPC G01N27/80 

FIELD: physics.

SUBSTANCE: magnetisation unit is a holder with permanent magnets with alternating oppositely directed magnetic moments. The measurement unit comprises two ferroprobe sensors and a counter wheel device, protected by a screen made from magnetically soft material. The control unit has a laser pointer and a remote control device. The measurement and magnetisation units lie in the bottom part of a vehicle for moving directly over the surface of the metal structure, and the control unit and the instrument unit lie in the top part of the vehicle. The tangential component of the magnetic field in two mutually perpendicular directions is detected.

EFFECT: possibility of magnetic nondestructive inspection of big metal structures, including bridges, cranes, oil storages, and high efficiency of inspection.

3 dwg, 2 cl