Patent ID: 8171771

Claim:
A method of nondestructive material testing, comprising the steps of: using a nondestructive material testing device having at least two transducers, using the transducers to emit beams for material testing, the transducers being arranged in a common holder device, moving the holder device by means of at least one of a swiveling system and a linear movement system along a trajectory curve over the surface of a workpiece to be tested, so that a scanning curve on the surface of the workpiece is scanned, determining an offset value, which specifies an offset between the beam direction of the transducer and the scanning curve, for each transducer, determining an optimal alignment of the holder device, for which the offset of the transducers is optimized overall, from the offset values, wherein a calibrating body is used for determination of the offset values, the offset being found with the aid of its reflection of the beam, and wherein determining the offset value for a transducer comprises determining an emission direction of the transducer by: determining two beam trajectory points at two different distances between the calibrating body and the transducer, wherein each beam trajectory point is determined by adjusting the lateral position of the calibrating body relative to the transducer to find a location of maximum beam reflection at the calibrating body, and calculating a straight line through the two determined beam trajectory points.