ELECTROMAGNETIC CONVERTER FOR CONTROL OF FERROMAGNETIC OBJECTS Russian patent published in 2010 - IPC G01R33/12 

FIELD: testing equipment.

SUBSTANCE: proposed invention is related to the field of nondestructive check of ferromagnetic objects (sheets, pipes, pipelines, reservoirs for storage of oil and gas). Electromagnetic converter is used with "П"-shaped ferromagnetic core, on which exciting inductance coils are arranged as serially connected, as well as two pairs of differentially connected metering windings. Size of core pole side is arranged as equal to two values of maximum thickness from range of controlled objects thickness, distance between poles is equal to six sides of pole; metering inductance coils are arranged in the middle of interpole distance one over another at a specified distance along vertical axis of "П"-shaped core, at the same time on one of its poles on both sides of exciting coil there are two additional opposite metering inductance coils installed, and the whole structure is placed into rectangular ferromagnetic screen.

EFFECT: broader information value of control due to detection of lengthy corrosion damages of ferromagnetic objects walls both on outer and inner side of wall.

2 dwg