Patent ID: 7819010

Claim:
A device for destruction-free testing of ferromagnetic component walls with respect to elongate defects, said device comprising: at least one sending transducer in the form of a high frequency induction coil which at least one sending transducer excites ultrasound waves in a wall area of a ferromagnetic component wall that is magnetized in a predetermined direction of magnetization, wherein the ultrasound waves propagate on a path that is oriented by the at least one sending transducer; at least one receiving transducer in the form of an induction coil, wherein the at least one sending transducer receives the ultrasound waves at a spacing from the at least one sending transducer; wherein a configuration of the at least one sending transducer and a high frequency emitted by the at least one sending transducer, which high frequency is to be determined based on a thickness of said ferromagnetic component wall, are selected so as to effect excitation of horizontal shear waves of higher order; wherein an orientation of said path is selected at a slant angle relative to said predetermined direction of magnetization; wherein the at least one receiving transducer is positioned lateral to said path and is oriented toward a predetermined testing area of said wall section of said ferromagnetic component wall in said path.