Zenodo (CERN European Organization for Nuclear Research), Oct 14, 2022
Creating an immersive Augmented Reality (AR) experience requires aligning the digital content wit... more Creating an immersive Augmented Reality (AR) experience requires aligning the digital content with the real environment so that the digital content appears and interacts in a similar way to a real object. For that, the virtual object must persist in its position across sessions and be occluded completely or partly, depending on whether a real-world object is in the line of sight. This research makes use of the cutting-edge technology available in the field of AR/MR, the Microsoft HoloLens 2.0, where the in-device Time of Flight (ToF) camera is used to scan the environment to create a Spatial Map. The CityGML LOD1 (OGC, 2012) model enriches the Spatial Map and, in addition, is used as an occlusion mask via a custom rendering pipeline to overcome the limited range of the HoloLens. The developed occlusion effect is used in urban planning scenarios to introduce a new area design featuring a car-free environment and enable public participation. The proposed method is evaluated based on performance indicators, including frames per second (FPS), since it is highly correlated to user comfort. The findings of the users' study demonstrate that the occlusion effect achieves its purpose since most of the participants reported enhancements in depth perception and overall experience by enabling the occlusion screening. Using 3D city models as an occlusion mask to overcome the hololens limited scanning range for outdoor AR-applications Immersive professional training for the textile industry
In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.
Restructuring in factories is becoming increasingly important to maintain the competitiveness of ... more Restructuring in factories is becoming increasingly important to maintain the competitiveness of a factory. In the planning and construction of a factory building, many different project participants turn a construction project into a highly complex task. In the research factory Arena2036 of the University of Stuttgart, in addition to the original research areas of the mobility of the future the building itself is also regarded as an object of research. A method is proposed that uses elements of requirements engineering and enables the user to make a structured decision about the type of a digital building model and its LoD. Requirement templates enable a quick identification of requirements of all stakeholders. The method is suggested to find out which information is important for the stakeholders and what type of digital building model, in which LoD is required for the conversion. Based on this an Augmented Reality application is developed to support the exchange of technical planners during a factory restructuring. The exchange between technical planners is to be streamlined by the application and planning phases shortened. The experiences of using the application are presented and it is proposed as a first step towards a didactic concept in the Arena2036.
Zenodo (CERN European Organization for Nuclear Research), Oct 14, 2022
Creating an immersive Augmented Reality (AR) experience requires aligning the digital content wit... more Creating an immersive Augmented Reality (AR) experience requires aligning the digital content with the real environment so that the digital content appears and interacts in a similar way to a real object. For that, the virtual object must persist in its position across sessions and be occluded completely or partly, depending on whether a real-world object is in the line of sight. This research makes use of the cutting-edge technology available in the field of AR/MR, the Microsoft HoloLens 2.0, where the in-device Time of Flight (ToF) camera is used to scan the environment to create a Spatial Map. The CityGML LOD1 (OGC, 2012) model enriches the Spatial Map and, in addition, is used as an occlusion mask via a custom rendering pipeline to overcome the limited range of the HoloLens. The developed occlusion effect is used in urban planning scenarios to introduce a new area design featuring a car-free environment and enable public participation. The proposed method is evaluated based on performance indicators, including frames per second (FPS), since it is highly correlated to user comfort. The findings of the users' study demonstrate that the occlusion effect achieves its purpose since most of the participants reported enhancements in depth perception and overall experience by enabling the occlusion screening. Using 3D city models as an occlusion mask to overcome the hololens limited scanning range for outdoor AR-applications Immersive professional training for the textile industry
Communications in Computer and Information Science, 2019
Recent years have seen the growing digitisation of cultural heritage, leveraged by innovative inf... more Recent years have seen the growing digitisation of cultural heritage, leveraged by innovative information technologies (imaging technologies, multimedia, virtual reality etc.). Advanced digitisation technologies have been instrumental in transforming conservation and scientific research methods regarding cultural heritage, as well as people’s experience of cultural heritage relics, monuments and events, thus paving the way for novel consumer services.
Journal of Information Technology in Construction, 2022
A combination of systematic and bibliometric literature review is applied. For bibliometric analy... more A combination of systematic and bibliometric literature review is applied. For bibliometric analysis a citation network analysis, keyword cluster analysis, burst detection analysis and the total citation score are evaluated. So far, literature mainly deals with creation of digital building models. However, in the operational phase of a building, updating digital building models is essential in order to use the digital building models for applications like maintenance, facility management and conversion planning. In this paper approaches and methods to update digital building data are examined systematically to reflect the current state of scientific knowledge. This will identify and compare update approaches for digital building models. Nine interrelated research areas can be identified that deal with updating digital building information. Based on the body of knowledge on the topic "Updating of digital building models", research gaps and poorly represented research areas ...
Restructuring in factories is becoming increasingly important to maintain the competitiveness of ... more Restructuring in factories is becoming increasingly important to maintain the competitiveness of a factory. In the planning and construction of a factory building, many different project participants turn a construction project into a highly complex task. In the research factory Arena2036 of the University of Stuttgart, in addition to the original research areas of the mobility of the future the building itself is also regarded as an object of research. A method is proposed that uses elements of requirements engineering and enables the user to make a structured decision about the type of a digital building model and its LoD. Requirement templates enable a quick identification of requirements of all stakeholders. The method is suggested to find out which information is important for the stakeholders and what type of digital building model, in which LoD is required for the conversion. Based on this an Augmented Reality application is developed to support the exchange of technical planners during a factory restructuring. The exchange between technical planners is to be streamlined by the application and planning phases shortened. The experiences of using the application are presented and it is proposed as a first step towards a didactic concept in the Arena2036.
The presented data article aims to provide the whole dataset obtained during an experiment of upd... more The presented data article aims to provide the whole dataset obtained during an experiment of updating laser scan point clouds with photogrammetry meshes. In this context, the data quality and calculation time of photogrammetry models from different recording devices and different software solutions were compared. It was investigated whether photos from smartphones are also appropriate for updating point clouds by using photogrammetry in a factory environment. The photos of a technical installation were taken in 08:30 min with these three devices: Nikon D810 with Sigma art 24 mm, iPhone 6 and iPhone XS. With each of the mentioned devices, three datasets have been created to provide enough data for the comparisons. One dataset (photos in .TIFF) of the iPhone XS is provided. The results of the datasets are used for a photogrammetry mesh quality comparison and a calculation time comparison. For the mesh quality comparison, visual qualitative inspections were performed on the models and the results were compared. Furthermore, all settings in the RealityCapture BETA 1.0.3.9696 ppi and Meshroom 2019 2.0 software are provided. A comparison of the quality of the DOI of original article
ZWF Zeitschrift für wirtschaftlichen Fabrikbetrieb, 2019
Kurzfassung Das Bedienpersonal von Maschinen ist in die Maßnahmen der Zustandsüberwachung und −di... more Kurzfassung Das Bedienpersonal von Maschinen ist in die Maßnahmen der Zustandsüberwachung und −diagnostik eingebunden. Bei der Weitergabe von Zustandsinformationen können Qualitätsverluste in den Meldewegen durch die menschliche Informationsverarbeitung und Kommunikation auftreten. Um mögliche Ursachen dieser verorten zu können, werden in diesem Beitrag eine Methodik sowie ein informationsverarbeitender Referenzprozess entwickelt. Die Ursachen konnten identifiziert und eine Verbesserung des Informationstransfers konnte erreicht werden.*)
Factory planning has the task of designing products, plants, processes and the building of a fact... more Factory planning has the task of designing products, plants, processes and the building of a factory. The requirements to the factory planning and the building concerned have changed in the last years. Regular restructuring gains more importance in order to maintain the competitiveness of a factory. Restrictions regarding new areas, shorter life cycles of product and production technology as well as a VUCA (Volatility, Uncertainty, Complexity & Ambiguity) world cause more frequently occurring restructuring measures within a factory. The interfaces between factory planning and building planning are crucial in conversion processes to optimally meet the new requirements of a factory building and to react to short-term adjustments. Because of the high adaptation rate of factories described above, a methodology for restructuring factory buildings based on an up-to-date digital factory model is conceived and designed for practical application in factory restructuring projects. The emphasi...
The method of requirements engineering originates from software development and describes the pro... more The method of requirements engineering originates from software development and describes the process of determining, documenting, validating, and managing requirements. The engineering approach in the process of identifying requirements offers the possibility to apply the systematic and methodical procedure to other branches not related to software development. The application of requirements engineering in the phase of requirements identification in the context of digital factory building models is investigated. In the life cycle phases of a factory building, different planners have a need for information from a digital building model. In order to identify these information requirements in the reconstruction phase of a factory, the method of requirements engineering will be used and adapted. The method of identifying and prioritizing information requirements adapted for digital building models is presented. The traceability of requirements is also integrated into the adapted method.
Zenodo (CERN European Organization for Nuclear Research), Oct 14, 2022
Creating an immersive Augmented Reality (AR) experience requires aligning the digital content wit... more Creating an immersive Augmented Reality (AR) experience requires aligning the digital content with the real environment so that the digital content appears and interacts in a similar way to a real object. For that, the virtual object must persist in its position across sessions and be occluded completely or partly, depending on whether a real-world object is in the line of sight. This research makes use of the cutting-edge technology available in the field of AR/MR, the Microsoft HoloLens 2.0, where the in-device Time of Flight (ToF) camera is used to scan the environment to create a Spatial Map. The CityGML LOD1 (OGC, 2012) model enriches the Spatial Map and, in addition, is used as an occlusion mask via a custom rendering pipeline to overcome the limited range of the HoloLens. The developed occlusion effect is used in urban planning scenarios to introduce a new area design featuring a car-free environment and enable public participation. The proposed method is evaluated based on performance indicators, including frames per second (FPS), since it is highly correlated to user comfort. The findings of the users' study demonstrate that the occlusion effect achieves its purpose since most of the participants reported enhancements in depth perception and overall experience by enabling the occlusion screening. Using 3D city models as an occlusion mask to overcome the hololens limited scanning range for outdoor AR-applications Immersive professional training for the textile industry
In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.
Restructuring in factories is becoming increasingly important to maintain the competitiveness of ... more Restructuring in factories is becoming increasingly important to maintain the competitiveness of a factory. In the planning and construction of a factory building, many different project participants turn a construction project into a highly complex task. In the research factory Arena2036 of the University of Stuttgart, in addition to the original research areas of the mobility of the future the building itself is also regarded as an object of research. A method is proposed that uses elements of requirements engineering and enables the user to make a structured decision about the type of a digital building model and its LoD. Requirement templates enable a quick identification of requirements of all stakeholders. The method is suggested to find out which information is important for the stakeholders and what type of digital building model, in which LoD is required for the conversion. Based on this an Augmented Reality application is developed to support the exchange of technical planners during a factory restructuring. The exchange between technical planners is to be streamlined by the application and planning phases shortened. The experiences of using the application are presented and it is proposed as a first step towards a didactic concept in the Arena2036.
Zenodo (CERN European Organization for Nuclear Research), Oct 14, 2022
Creating an immersive Augmented Reality (AR) experience requires aligning the digital content wit... more Creating an immersive Augmented Reality (AR) experience requires aligning the digital content with the real environment so that the digital content appears and interacts in a similar way to a real object. For that, the virtual object must persist in its position across sessions and be occluded completely or partly, depending on whether a real-world object is in the line of sight. This research makes use of the cutting-edge technology available in the field of AR/MR, the Microsoft HoloLens 2.0, where the in-device Time of Flight (ToF) camera is used to scan the environment to create a Spatial Map. The CityGML LOD1 (OGC, 2012) model enriches the Spatial Map and, in addition, is used as an occlusion mask via a custom rendering pipeline to overcome the limited range of the HoloLens. The developed occlusion effect is used in urban planning scenarios to introduce a new area design featuring a car-free environment and enable public participation. The proposed method is evaluated based on performance indicators, including frames per second (FPS), since it is highly correlated to user comfort. The findings of the users' study demonstrate that the occlusion effect achieves its purpose since most of the participants reported enhancements in depth perception and overall experience by enabling the occlusion screening. Using 3D city models as an occlusion mask to overcome the hololens limited scanning range for outdoor AR-applications Immersive professional training for the textile industry
Communications in Computer and Information Science, 2019
Recent years have seen the growing digitisation of cultural heritage, leveraged by innovative inf... more Recent years have seen the growing digitisation of cultural heritage, leveraged by innovative information technologies (imaging technologies, multimedia, virtual reality etc.). Advanced digitisation technologies have been instrumental in transforming conservation and scientific research methods regarding cultural heritage, as well as people’s experience of cultural heritage relics, monuments and events, thus paving the way for novel consumer services.
Journal of Information Technology in Construction, 2022
A combination of systematic and bibliometric literature review is applied. For bibliometric analy... more A combination of systematic and bibliometric literature review is applied. For bibliometric analysis a citation network analysis, keyword cluster analysis, burst detection analysis and the total citation score are evaluated. So far, literature mainly deals with creation of digital building models. However, in the operational phase of a building, updating digital building models is essential in order to use the digital building models for applications like maintenance, facility management and conversion planning. In this paper approaches and methods to update digital building data are examined systematically to reflect the current state of scientific knowledge. This will identify and compare update approaches for digital building models. Nine interrelated research areas can be identified that deal with updating digital building information. Based on the body of knowledge on the topic "Updating of digital building models", research gaps and poorly represented research areas ...
Restructuring in factories is becoming increasingly important to maintain the competitiveness of ... more Restructuring in factories is becoming increasingly important to maintain the competitiveness of a factory. In the planning and construction of a factory building, many different project participants turn a construction project into a highly complex task. In the research factory Arena2036 of the University of Stuttgart, in addition to the original research areas of the mobility of the future the building itself is also regarded as an object of research. A method is proposed that uses elements of requirements engineering and enables the user to make a structured decision about the type of a digital building model and its LoD. Requirement templates enable a quick identification of requirements of all stakeholders. The method is suggested to find out which information is important for the stakeholders and what type of digital building model, in which LoD is required for the conversion. Based on this an Augmented Reality application is developed to support the exchange of technical planners during a factory restructuring. The exchange between technical planners is to be streamlined by the application and planning phases shortened. The experiences of using the application are presented and it is proposed as a first step towards a didactic concept in the Arena2036.
The presented data article aims to provide the whole dataset obtained during an experiment of upd... more The presented data article aims to provide the whole dataset obtained during an experiment of updating laser scan point clouds with photogrammetry meshes. In this context, the data quality and calculation time of photogrammetry models from different recording devices and different software solutions were compared. It was investigated whether photos from smartphones are also appropriate for updating point clouds by using photogrammetry in a factory environment. The photos of a technical installation were taken in 08:30 min with these three devices: Nikon D810 with Sigma art 24 mm, iPhone 6 and iPhone XS. With each of the mentioned devices, three datasets have been created to provide enough data for the comparisons. One dataset (photos in .TIFF) of the iPhone XS is provided. The results of the datasets are used for a photogrammetry mesh quality comparison and a calculation time comparison. For the mesh quality comparison, visual qualitative inspections were performed on the models and the results were compared. Furthermore, all settings in the RealityCapture BETA 1.0.3.9696 ppi and Meshroom 2019 2.0 software are provided. A comparison of the quality of the DOI of original article
ZWF Zeitschrift für wirtschaftlichen Fabrikbetrieb, 2019
Kurzfassung Das Bedienpersonal von Maschinen ist in die Maßnahmen der Zustandsüberwachung und −di... more Kurzfassung Das Bedienpersonal von Maschinen ist in die Maßnahmen der Zustandsüberwachung und −diagnostik eingebunden. Bei der Weitergabe von Zustandsinformationen können Qualitätsverluste in den Meldewegen durch die menschliche Informationsverarbeitung und Kommunikation auftreten. Um mögliche Ursachen dieser verorten zu können, werden in diesem Beitrag eine Methodik sowie ein informationsverarbeitender Referenzprozess entwickelt. Die Ursachen konnten identifiziert und eine Verbesserung des Informationstransfers konnte erreicht werden.*)
Factory planning has the task of designing products, plants, processes and the building of a fact... more Factory planning has the task of designing products, plants, processes and the building of a factory. The requirements to the factory planning and the building concerned have changed in the last years. Regular restructuring gains more importance in order to maintain the competitiveness of a factory. Restrictions regarding new areas, shorter life cycles of product and production technology as well as a VUCA (Volatility, Uncertainty, Complexity & Ambiguity) world cause more frequently occurring restructuring measures within a factory. The interfaces between factory planning and building planning are crucial in conversion processes to optimally meet the new requirements of a factory building and to react to short-term adjustments. Because of the high adaptation rate of factories described above, a methodology for restructuring factory buildings based on an up-to-date digital factory model is conceived and designed for practical application in factory restructuring projects. The emphasi...
The method of requirements engineering originates from software development and describes the pro... more The method of requirements engineering originates from software development and describes the process of determining, documenting, validating, and managing requirements. The engineering approach in the process of identifying requirements offers the possibility to apply the systematic and methodical procedure to other branches not related to software development. The application of requirements engineering in the phase of requirements identification in the context of digital factory building models is investigated. In the life cycle phases of a factory building, different planners have a need for information from a digital building model. In order to identify these information requirements in the reconstruction phase of a factory, the method of requirements engineering will be used and adapted. The method of identifying and prioritizing information requirements adapted for digital building models is presented. The traceability of requirements is also integrated into the adapted method.
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Papers by René Hellmuth