Mahle International Gmbh

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Ioannis Papadopoulos

Holger Schnell

Steven Oeckl

Michel Fritz

Gerhard Mook

Werner Schön

Gustav Müller

A method for detecting defects in a piston for an internal combustion engine may include providing the piston in a measurement arrangement that includes a measurement probe having a first electrical coil element for generating an electromagnetic alternating field and a second electrical coil element for detecting an electromagnetic alternating field. The method may also include moving the measurement probe over a piston surface of the piston, and providing an electrical alternating current in the first coil element to generate an electromagnetic alternating field that interacts with a material of the piston in the region under the piston surface. The method may further include evaluating an electrical alternating voltage induced in the second coil element by the electromagnetic alternating field after interaction with the material of the piston.

Method for detecting defects in a piston for an internal combustion engine

In a method and an evaluation device for determining the position of a structure located in an object to be investigated by means of X-ray computer tomography, a cutting data record, which images the object in a cutting plane, is determined from a volume data record of the object. The cutting data record is binarized to form a binary data record, in which the structure voxels imaging the structure and the surface voxels imaging an object surface are determined. To determine the position, a distance data record is produced in such a way that a distance value, which characterizes the smallest distance of the respective distance voxel from the surface voxels, is assigned to each distance voxel of the distance data record. The distance voxels corresponding to the structure voxels are then determined and the associated distance values evaluated.

Method and evaluation device for determining the position of a structure located in an object to be examined by means of X-ray computer tomography

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Winnenden, Germany

Ioannis Papadopoulos