ANALYSIS FOR STRUCTURES MULTILAYERS eddy currents includes a body of high permeability material which is formed to include a core CENTRAL AND ADDITIONAL WALL. A conversion is wound coil around the core body and lie detector coils A FLOCK OF ASSOCIATED WITH ADDITIONAL WALL. Is wound a converter COIL OUTSIDE ON FOREIGN additional wall. Alternately it energizes the coil converting a first signal CENTRAL WITH HIGH FREQUENCY MAINLY PRODUCING eddy currents TOP OF THE multilayer structure. THESE eddy currents are detected DETECTOR COIL DEFECTS AND STRUCTURAL ANALYZE AND TRAINING IN THE upper surface of the multilayer structure. EXCITE COIL AFTER THE CENTRAL NUCLEUS a second frequency signal lower than the first signal. SIGNAL INTRODUCED AS eddy currents in deeper layers of the structure. TALES eddy currents are detected by the sensor coils and the signs are thus detected and stored. EXTERIOR COIL EXCITE converting again with a low frequency signal and bobbins DETECTOR IS POWERED TO DETECT eddy currents in deeper layers of the structure. The excitation signal COIL OUTER converting REGARDING THE SIGNAL IS CLASSIFIED COIL TO SEPARATE CENTRAL converting AN INDICATOR OR DEFECTS INDICATOR SIGNAL IN THE STRUCTURE OF COMPONENTS Overlapping layered structure.
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