Elektromagnetischer Ultraschallpruefkopf

DE 10259409 B UPAB: 20040527 NOVELTY - The test head has a transmission coil (7), supplied with a HF voltage for provision of a HF magnetic field and a pre-magnetization device (V), providing a quasi-static magnetic field superimposed on the HF magnetic field within the workpiece (5), together with a reception coil (8) coupled to an evaluation device. The transmission coil and reception coil are wound around a part circular magnetic core (6), abutting the workpiece surface at its ends (11), the pre-magnetization device directly or indirectly contacting the workpiece via a contact surface (9), positioned to the side of the magnetic core, which extends perpendicular to the contact surface. USE - The electromagnetic ultrasonic test head is used for non-destructive workpiece testing, e.g. for detecting material faults or for thickness measurement. ADVANTAGE - Loss-free coupling of electromagnetic fields with tested workpiece.