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Item type:Publication, Access status: with files , Advancements in aircraft engine Inspection: a MEMS-based 3D measuring borescope(Multidisciplinary Digital Publishing Institute (MDPI), 2025-05-08); ; ; Leder, GüntherAircraft engines are regularly inspected with borescopes to detect faults at an early stage and maintain airworthiness. A critical part of this inspection process is accurately measuring any detected damage to determine whether it exceeds allowable limits. Current state-of-the-art borescope measurement techniques—primarily stereo camera systems and pattern projection—face significant challenges when engines lack sufficient surface features or when illumination is inadequate for reliable stereo matching. MEMS-based 3D scanners address these issues by focusing laser light onto a small spot, reducing dependency on surface texture and improving illumination. However, miniaturized MEMS-based scanner borescopes that can pass through standard engine inspection ports are not yet available. This work examines the essential steps to downsize MEMS 3D scanners for direct integration into borescope inspections, thereby enhancing the accuracy and reliability of aircraft engine fault detection.Publicationtype: Journal Article44 37 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Identification of parameter sets for the selection of microelectronic components for sensor-integrating machine elementsThe potentials opening up by cyber-physical systems in the form of sensor-integrating machine elements (SiMEs) allowing for in situ measurements result in more complex systems with a multitude of different microelectronic components, nevertheless providing the database usable for digitalization of in situ processes as well as allowing the Internet of Things implementation for processes. Increasing system complexity again results in a more complex system design and configuration process, taking into account the properties of each subsystem. Obtaining a framework for selecting the individual components for creating a SiME therefore is crucial for simplifying the design process. Thereby, this article presents a first step toward such a framework, by identifying parameter sets which can be used for selecting the microelectronic components to be used in the machine element in design, where the parameters are seen as characteristics of the individual components, limiting the number of usable components and therefore allowing the design and configuration process. The method used in this article is based on use case-specific as well as general parameter analysis, which is designed to be applied to a multitude of use cases for different machine elements (MEs). Being applied to the use case of a fastening bolt, two parameter sets, first for creating a component database and second selecting components to be used, are derived, demonstrating the applicability of the suggested methods. Finally, the parameter sets are validated by an exemplary component selection process, highlighting the potential of the concept as well as showing room for further research.Publicationtype: Journal Article38