TY - CHAP A1 - Bohn, Gunther A1 - Taub, J. A1 - Linke, Andreas A1 - Bayer, Sven A1 - Oeser, David A1 - Ziegler, Andreas A1 - Ettl, P. A1 - Ackva, Ansgar T1 - High-resolution Interferometric Measurement of Thickness Change on a Lithium-Ion Pouch Battery T2 - 3rd International Conference on Environmental and Energy Engineering (IC3E 2019) N2 - Volume change of graphite leads to change in thickness of battery storage layers during discharging and charging. Pouch cell lithium ion batteries are used in the field of electric vehicles and solar home storage. This paper shows a measurement setup for the three-dimensional measurement of thickness change on a flat 6.7mm thick pouch cell using a white light interferometer. With a measuring field of 7.05mm diameter the resulting 3D thickness change record contains 226000 3D readings. The measuring points have a lateral distance of 13.1μm. The repeatability of the measurement is 312.8nm for the individual values and 64.1nm for the average value. In addition, this paper shows how the storage capacity of this pouch cell drops over 30 charge cycles. Y1 - 2019 U6 - https://doi.org/10.1088/1755-1315/281/1/012030 VL - 281 ER - TY - JOUR A1 - Prappacher, Nico A1 - Bullmann, Markus A1 - Bohn, Gunther A1 - Deinzer, Frank A1 - Linke, Andreas T1 - Defect Detection on Rolling Element Surface Scans Using Neural Image Segmentation JF - Applied Sciences Y1 - 2020 U6 - https://doi.org/10.3390/app10093290 SN - 2076-3417 VL - 10 IS - 9 ER - TY - JOUR A1 - Gielinger, Sebastian A1 - Bohn, Gunther A1 - Deinzer, Frank A1 - Linke, Andreas T1 - Investigation of an inline inspection method for the examination of cylinder-like specular surfaces using deflectometry JF - applied sciences N2 - An optical measuring method is presented, with which it is possible to measure and evaluate reflective cylindrical surfaces using a combination of deflectometry and subsequent reconstruction of the surface. The system is set up and tested on rolling elements of cylindrical roller bearings. However, it is not limited to this use case and can be applied to other cylindrical specular surfaces. The system distinguishes itself from existing test methods through the combination of high-resolution three-dimensional defect measurement with a very short recording time, and offers the possibility of introducing tolerance limits in the production of cylindrical specular surfaces. With this method, it is possible to record a defect with the dimensions of 1.3 mm by 1.8 mm within 5 s and to reconstruct the absolute depth. The resolution of the system is below 10 μm in both X- and Y-direction, and is therefore sufficiently accurate to detect typical surface defects such as scratches, dents, or deformations. To validate the measured values of the system, the results of an artificially generated 10.35 μm deep defect location were compared with those of a highly accurate mechanical stylus measurement. KW - automated optical inspection KW - roller bearing KW - line scan camera Y1 - 2023 UR - https://doi.org/10.3390/app12136449 SN - 2076-3417 VL - 12 IS - 13 ER - TY - JOUR A1 - Endres, Julian A1 - Bayer, Fabian A1 - Linke, Andreas A1 - Ackva, Ansgar T1 - Modular Real-Time Development Platform for Power Electronic Systems JF - Bodo's power systems Y1 - 2018 SN - 1863-5598 IS - 7 SP - 58 EP - 60 ER -