[1] Wbk Institute of Production Science, Karlsruhe Institute of Technology, Karlsruhe
[2] Institute for Measurement and Sensor Technology, TU Kaiserslautern, Kaiserslautern
[3] Institute of Machining Technology, TU Dortmund University, Dortmund
[4] Fraunhofer Institute for Nondestructive Testing IZFP, Saarbrücken