ELECTROMAGNETIC PROBE FOR IN-TUBE FLAW DETECTION OF TUBE WALL MATERIAL Russian patent published in 2007 - IPC G01N27/90 

FIELD: in-tube flaw detection of tube wall material.

SUBSTANCE: electromagnetic probe for in-tube flaw detection of tube wall material contains onboard power source, connected serially: fixed frequency generator, commutator, matrix panoramic inductive vortex-current transformer, consisting of n superimposed inductance coils, and detector, and also rope with communication cable, while introduced to probe is ribbon of elastic material, provided with fringe on one end, while n superimposed inductance coils of matrix transformer are positioned in cross-section of hollow cylindrical frame with even step along circle of its external generating surface, frame being made of dielectric material, while external working surfaces of superimposed coils are made flush with upper generatrix cylindrical surface of frame and ribbon is fastened to these surfaces of frame and coils with its fringe directed outside, making the probe look like a wire brush, fringe is made with even height, elements of blocks of generator, commutator and detector are made on electronic board, positioned in the hollow of cylindrical frame, which is filled with sealing compound, for power source a separate compartment is provided in the hollow of frame, rope is rigidly connected to end of frame, and communication cable is connected to output of detector.

EFFECT: decreased dimensions of probe, production of stable signal at probe output, and also realization of continuous in-tube flaw detection of tube wall of both ferromagnetic and non ferromagnetic material.

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