TY - JOUR A1 - Schlegl, Thomas A1 - Tomaselli, Domenico A1 - Schlegl, Stefan A1 - West, Nicolai A1 - Deuse, Jochen T1 - Automated search of process control limits for fault detection in time series data JF - Journal of Process Control N2 - Manually defined control limits remain a common strategy for quality control in manufacturing due to their ease of deployment on the shop floor compared to more advanced data analysis approaches. Despite their continued importance, there is no systematic method of defining these control limits. However, sub-optimal control limits can lead to undetected faults or cause unnecessary interruption to production. This manuscript presents an algorithm that systematizes this manual process into an efficient search task. We conceptualized the search task as a sequence of sub-problems that are based on the conventional steps taken by process experts when defining control limits. This algorithm can be integrated into an expert tool for shop floor personnel to automate the definition of control limits in annotated time series data. We demonstrate the efficacy of the control limits found by our algorithm by comparing them to those manually defined by process experts in real-world process data from the automotive industry. Furthermore, we show that our algorithm generalizes to traditional time series classification problems and achieves state-of-the-art performance on selected benchmark datasets. Our work is the first effort in automating the otherwise manual definition of control limits for fault detection. KW - Time series classification KW - Fault detection KW - Control limits KW - Process control Y1 - 2022 U6 - https://doi.org/10.1016/j.jprocont.2022.07.002 VL - 117 SP - 52 EP - 64 PB - Elsevier ER - TY - JOUR A1 - Beimler, Josef A1 - Leißl, Caroline A1 - Ebner, Lena A1 - Elsner, Michael A1 - Mühlbauer, Gerhard A1 - Kohlert, Dieter A1 - Schubert, Martin J. W. A1 - Weiß, Andreas P. A1 - Sterner, Michael A1 - Raith, Thomas A1 - Afranseder, Martin A1 - Krapf, Tobias A1 - Mottok, Jürgen A1 - Siemers, Christian A1 - Großmann, Benjamin A1 - Höcherl, Johannes A1 - Schlegl, Thomas A1 - Schneider, Ralph A1 - Milaev, Johannes A1 - Rampelt, Christina A1 - Roduner, Christian A1 - Glowa, Christoph A1 - Bachl, Christoph A1 - Schliekmann, Claus A1 - Gnan, Alfons A1 - Grill, Martin A1 - Ruhland, Karl A1 - Piehler, Thomas A1 - Friers, Daniel A1 - Wels, Harald A1 - Pflug, Kenny A1 - Kucera, Markus A1 - Waas, Thomas A1 - Schlachetzki, Felix A1 - Boy, Sandra A1 - Pemmerl, Josef A1 - Leis, Alexander A1 - Welsch, Andreas F.X. A1 - Graf, Franz A1 - Zenger, Gerhard A1 - Volbert, Klaus A1 - Waas, Thomas A1 - Scherzinger, Stefanie A1 - Klettke, Meike A1 - Störl, Uta A1 - Heyl, C. A1 - Boldenko, A. A1 - Monkman, Gareth J. A1 - Kujat, Richard A1 - Briem, Ulrich A1 - Hierl, Stefan A1 - Talbot, Sebastian A1 - Schmailzl, Anton A1 - Ławrowski, Robert Damian A1 - Prommesberger, Christian A1 - Langer, Christoph A1 - Dams, Florian A1 - Schreiner, Rupert A1 - Valentino, Piergiorgio A1 - Romano, Marco A1 - Ehrlich, Ingo A1 - Furgiuele, Franco A1 - Gebbeken, Norbert A1 - Eisenried, Michael A1 - Jungbauer, Bastian A1 - Hutterer, Albert A1 - Bauhuber, Michael A1 - Mikrievskij, Andreas A1 - Argauer, Monika A1 - Hummel, Helmut A1 - Lechner, Alfred A1 - Liebetruth, Thomas A1 - Schumm, Michael A1 - Joseph, Saskia A1 - Reschke, Michael A1 - Soska, Alexander A1 - Schroll-Decker, Irmgard A1 - Putzer, Michael A1 - Rasmussen, John A1 - Dendorfer, Sebastian A1 - Weber, Tim A1 - Al-Munajjed, Amir Andreas A1 - Verkerke, Gijsbertus Jacob A1 - Renkawitz, Tobias A1 - Haug, Sonja A1 - Rudolph, Clarissa A1 - Zeitler, Annika A1 - Schaubeck, Simon A1 - Steffens, Oliver A1 - Rechenauer, Christian A1 - Schulz-Brize, Thekla A1 - Fleischmann, Florian A1 - Kusterle, Wolfgang A1 - Beer, Anne A1 - Wagner, Bernd A1 - Neidhart, Thomas ED - Baier, Wolfgang T1 - Forschungsbericht 2013 T3 - Forschungsberichte der OTH Regensburg - 2013 Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-7990 CY - Regensburg ER - TY - JOUR A1 - Scharfenberg, Georg A1 - Mottok, Jürgen A1 - Artmann, Christina A1 - Hobelsberger, Martin A1 - Paric, Ivan A1 - Großmann, Benjamin A1 - Pohlt, Clemens A1 - Wackerbarth, Alena A1 - Pausch, Uli A1 - Heidrich, Christiane A1 - Fadanelli, Martin A1 - Elsner, Michael A1 - Pöcher, Daniel A1 - Pittroff, Lenz A1 - Beer, Stefan A1 - Brückl, Oliver A1 - Haslbeck, Matthias A1 - Sterner, Michael A1 - Thema, Martin A1 - Muggenthaler, Nicole A1 - Lenck, Thorsten A1 - Götz, Philipp A1 - Eckert, Fabian A1 - Deubzer, Michael A1 - Stingl, Armin A1 - Simsek, Erol A1 - Krämer, Stefan A1 - Großmann, Benjamin A1 - Schlegl, Thomas A1 - Niedersteiner, Sascha A1 - Berlehner, Thomas A1 - Joblin, Mitchell A1 - Mauerer, Wolfgang A1 - Apel, Sven A1 - Siegmund, Janet A1 - Riehle, Dirk A1 - Weber, Joachim A1 - Palm, Christoph A1 - Zobel, Martin A1 - Al-Falouji, Ghassan A1 - Prestel, Dietmar A1 - Scharfenberg, Georg A1 - Mandl, Roland A1 - Deinzer, Arnulf A1 - Halang, W. A1 - Margraf-Stiksrud, Jutta A1 - Sick, Bernhard A1 - Deinzer, Renate A1 - Scherzinger, Stefanie A1 - Klettke, Meike A1 - Störl, Uta A1 - Wiech, Katharina A1 - Kubata, Christoph A1 - Sindersberger, Dirk A1 - Monkman, Gareth J. A1 - Dollinger, Markus A1 - Dembianny, Sven A1 - Kölbl, Andreas A1 - Welker, Franz A1 - Meier, Matthias A1 - Thumann, Philipp A1 - Swidergal, Krzysztof A1 - Wagner, Marcus A1 - Haug, Sonja A1 - Vernim, Matthias A1 - Seidenstücker, Barbara A1 - Weber, Karsten A1 - Arsan, Christian A1 - Schone, Reinhold A1 - Münder, Johannes A1 - Schroll-Decker, Irmgard A1 - Dillinger, Andrea Elisabeth A1 - Fuchshofer, Rudolf A1 - Monkman, Gareth J. A1 - Shamonin (Chamonine), Mikhail A1 - Geith, Markus A. A1 - Koch, Fabian A1 - Ühlin, Christian A1 - Schratzenstaller, Thomas A1 - Saßmannshausen, Sean Patrick A1 - Auchter, Eberhard A1 - Kriz, Willy A1 - Springer, Othmar A1 - Thumann, Maria A1 - Kusterle, Wolfgang A1 - Obermeier, Andreas A1 - Udalzow, Anton A1 - Schmailzl, Anton A1 - Hierl, Stefan A1 - Langer, Christoph A1 - Schreiner, Rupert ED - Baier, Wolfgang T1 - Forschungsbericht 2015 T3 - Forschungsberichte der OTH Regensburg - 2015 Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-13867 SN - 978-3-00-048589-3 CY - Regensburg ER - TY - JOUR A1 - Rück, Thomas A1 - Bierl, Rudolf A1 - Lechner, Alfred A1 - Graf, Antonia A1 - Dams, Florian A1 - Schreiner, Rupert A1 - Auchter, Eberhard A1 - Kriz, Willy A1 - Deubzer, MIchael A1 - Schiller, Frank A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Margull, Ulrich A1 - Hagel, Georg A1 - Utesch, Matthias A1 - Waldherr, Franz A1 - Böhm, Matthias A1 - Fraunhoffer, Judith A1 - Gardeia, Armin A1 - Schneider, Ralph A1 - Streubel, Janet A1 - Landes, Dieter A1 - Studt, Reimer A1 - Peuker, Dominik A1 - Scharfenberg, Georg A1 - Hook, Christian A1 - Schuster, Dietwald A1 - Ehrlich, Ingo A1 - Dinnebier, Heinrich A1 - Briem, Ulrich A1 - Lämmlein, Stephan A1 - Koder, Alexander A1 - Bialek, Adam A1 - Genewsky, Axel A1 - Neumeier, Michael A1 - Schlosser, Philipp A1 - Rabl, Hans-Peter A1 - Paule, Matthias A1 - Galster, Christoph A1 - Schiedermeier, Michael A1 - Zwickel, Andreas A1 - Hobmeier, Christoph A1 - Bischoff, Tobias A1 - Rill, Georg A1 - Schaeffer, Thomas A1 - Arbesmeier, Martin A1 - Groß, Andreas A1 - Schlegl, Thomas A1 - Becker, Mark A1 - Senn, Konrad A1 - Schliekmann, Claus A1 - Scholz, Peter A1 - Sippl, Christian A1 - Grill, Martin ED - Eckstein, Josef T1 - Forschungsbericht 2011 / Hochschule für Angewandte Wissenschaften - Fachhochschule Regensburg T3 - Forschungsberichte der OTH Regensburg - 2011 Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-7321 SN - 1868-3533 CY - Regensburg ER - TY - CHAP A1 - Höcherl, Johannes A1 - Niedersteiner, Sascha A1 - Haug, Sonja A1 - Pohlt, Clemens A1 - Schlegl, Thomas A1 - Weber, Karsten A1 - Berlehner, Thomas T1 - Smart Workbench BT - Ein multimodales und bidirektionales Assistenzsystem für den industriellen Einsatz T2 - 2. OTH Clustertagung, 18.01.2017, Regensburg Y1 - 2017 ER - TY - CHAP A1 - Höcherl, Johannes A1 - Niedersteiner, Sascha A1 - Haug, Sonja A1 - Pohlt, Clemens A1 - Schlegl, Thomas A1 - Weber, Karsten A1 - Berlehner, Thomas ED - Weidner, Robert T1 - Smart Workbench BT - Ein multimodales und bidirektionales Assistenzsystem für den industriellen Einsatz T2 - 2. Transdisziplinären Konferenz "Technische Unterstützungssysteme, die die Menschen wirklich wollen", 12.-13.12.2016, Helmut-Schmidt-Universität, Hamburg Y1 - 2016 SP - 49 EP - 50 ER - TY - CHAP A1 - Höcherl, Johannes A1 - Bottke, Christian A1 - Schlegl, Thomas T1 - Eine redundante Steuerungsarchitektur zur Realisierung sicherer Mensch-Roboter-Kollaboration - Entwicklung gemäß DIN EN ISO 10218, 13849 und 12100 T2 - Tagungsband AALE 2014 N2 - Das Forschungsprojekt ManuCyte konzentriert sich auf die Realisierung einer Plattform für die Kultivierung menschlicher Zellen und Gewebe im industriellen Maßstab. Für die Mensch-Roboter-Kolloboration ist die Robotersteuerung technologisch diversitär und redundant ausgeführt. Skizziert und analysiert wird ein prototypisches Robotersystem zum Erhalt von sicherer Mensch-Roboter-Kollaboration. Eine normgerechte Risikobeurteilung wird anhand der vorliegenden Anwendung Schritt für Schritt aufgezeigt. Wichtige Kenngrößen zur Bestimmung des sicherheitstechnischen Leistungsgrades sicherheitsrelevanter Steuerungsfunktionen werden exemplarisch berechnet und zusammengefasst. Die Vorgehensweise der Steuerungsentwicklung und die entwickelte Steuerungsarchitektur werden aufgezeigt. Außerdem werden die Sicherheitsanforderungen exemplarisch validiert und die Ergebnisse diskutiert. Aufgezeigt werden die Entwicklungsschritte zu einer möglichen Zertifizierung. A prototypic robot system for Human-Robot Collaboration is sketched and analyzed in the article at hand. For the present application, the risk assessment according to the relevant standards is visualized step by step. Important parameters to determine the safety performance level of safety related control functions are calculated and summarized. The procedure to develop a safe control system and the developed control architecture are shown. Furthermore, the safety requirements are validated exemplarily and the results are discussed. Possible steps to carry the system to a certification complete the present article. KW - Funktionssicherheit KW - Mensch-Roboter-Kooperation KW - Risikoanalyse KW - Robotersteuerung KW - Sicherheitstechnik KW - Steuerungs- und Regelungssystem Y1 - 2014 UR - https://www.oth-regensburg.de/fakultaeten/maschinenbau/aale-2014.html SN - 978-3-8356-7142-3 SP - 165 EP - 173 PB - Deutscher Industrieverlag CY - München ER - TY - CHAP A1 - Höcherl, Johannes A1 - Pohlt, Clemens A1 - Niedersteiner, Sascha A1 - Schlegl, Thomas A1 - Haug, Sonja A1 - Weber, Karsten T1 - Entwicklung eines industriellen Assistenzsystems unter Einbeziehung der Anlagenbediener T2 - 2. OTH Clusterkonferenz Y1 - 2017 SP - 11 EP - 15 ER - TY - CHAP A1 - Haug, Sonja A1 - Glashauser, Lisa A1 - Großmann, Benjamin A1 - Pohlt, Clemens A1 - Schlegl, Thomas A1 - Wackerbarth, Alena A1 - Weber, Karsten T1 - Gamification im Anlernprozess am Industriearbeitsplatz BT - Begleitstudie zur Entwicklung eines gestengesteuerten teilautomatisierten Assistenzsystems T2 - 2. OTH Clusterkonferenz Y1 - 2017 SP - 183 EP - 188 ER - TY - CHAP A1 - Weber, Karsten A1 - Haug, Sonja A1 - Schlegl, Thomas A1 - Pohlt, Clemens A1 - Höcherl, Johannes T1 - Kollaborative Robotik als Beispiel der Mensch-Maschine-Interaktion BT - Chance für mehr Inklusion im Arbeitsleben? T2 - Tagung Technikfolgenabschätzung, 19.06.2017, Akademie der Wissenschaften Wien Y1 - 2017 ER - TY - CHAP A1 - Haug, Sonja A1 - Glashauser, Lisa A1 - Großmann, Benjamin A1 - Pohlt, Clemens A1 - Schlegl, Thomas A1 - Wackerbarth, Alena A1 - Weber, Karsten ED - Weidner, Robert T1 - Gamification im Anlernprozess am Industriearbeitsplatz - ein inklusiver Ansatz BT - Studie zur Entwicklung eines Anlerntutorials für ein gestengesteuertes teilautomatisiertes Assistenzsystem T2 - 2. Transdisziplinären Konferenz "Technische Unterstützungssysteme, die die Menschen wirklich wollen", 12.-13.12.2016, Helmut- Schmidt-Universität Hamburg N2 - Um die Lebensqualität und Einsatzfähigkeit von Menschen mit Behinderung oder älteren Menschen zu verbessern, wurde untersucht, inwiefern Gamification-Anwendungen beim Anlernen einer Gestensteuerung geeignet sind. Grundlage des Experiments stellt ein intelligenter Arbeitsplatz (Smart Workbench, SWoB) dar, der Personen bei manuellen Handhabungsaufgaben unterstützt sowie bestimmte Produktionsprozesse teilautomatisiert ausführt. Um die Anlage bedienen zu können, muss im Vorfeld eine Einweisung erfolgen, welche von Menschen oder durch ein Lerntutorial mit Gamification-Elementen zur Motivationssteigerung durchgeführt werden kann. In der Studie wurde untersucht, welche Form des Anleitens aus welchen Gründen von unterschiedlichen Personen eher akzeptiert oder abgelehnt wird. Y1 - 2016 UR - https://www.researchgate.net/publication/311699548_Gamification_im_Anlernprozess_am_Industriearbeitsplatz_-_ein_inklusiver_Ansatz_Evaluationsstudie_zur_Entwicklung_eines_Anlerntutorials_fur_ein_gestengesteuertes_teilautomatisiertes_Assistenzsystem SP - 421 EP - 430 ER - TY - CHAP A1 - Lang, Jonas A1 - Becke, Mark A1 - Schlegl, Thomas ED - Liu, Honghai ED - Kubota, Naoyuki ED - Zhu, Xiangyang ED - Dillmann, Rüdiger ED - Zhou, Dalin T1 - A Systematic Approach for the Parameterisation of the Kernel-Based Hough Transform Using a Human-Generated Ground Truth T2 - Intelligent Robotics and Applications N2 - Lines are one of the basic features that are used to characterise the content of an image and to detect objects. Unlike edges or segmented blobs, lines are not only an accumulation of certain feature pixels but can also be described in an easy and exact mathematical way. Besides a lot of different detection methods, the Hough transform has gained much attention in recent years. With increasing processing power and continuous development, computer vision algorithms get more powerful with respect to speed, robustness and accuracy. But there still arise problems when searching for the best parameters for an algorithm or when characterising and evaluating the results of feature detection tasks. It is often difficult to estimate the accuracy of an algorithm and the influences of the parameter selection. Highly interdependent parameters and preprocessing steps continually lead to only hardly comprehensible results. Therefore, instead of pure trial and error and subjective ratings, a systematic assessment with a hard, numerical evaluation criterion is suggested. The paper at hand deals with the latter ones by using a human-generated ground truth to approach the problem. Thereby, the accuracy of the surveyed Kernel-based Hough transform algorithm was improved by a factor of three. These results are used for the tracking of cylindrical markers and to reconstruct their spatial arrangement for a biomedical research application. KW - Feature detection KW - Hough transform KW - Human-generated ground truth KW - Image processing KW - Line detection KW - Systematic parameterisation Y1 - 2015 SN - 978-3-319-22878-5 U6 - https://doi.org/10.1007/978-3-319-22879-2_44 VL - 9244 SP - 473 EP - 486 PB - Springer CY - Cham ER - TY - JOUR A1 - Hoecherl, Johannes A1 - Wrede, Britta A1 - Schlegl, Thomas T1 - Developing human-robot assembly cells - Simulation, virtual interaction, and applications JF - ATP EDITION N2 - In human-robot assembly cells, some tasks in a production process are carried out by the user, others by the robot, and some tasks are carried out in collaboration. However, the potential and advantages of such systems have not yet been fully harnessed. A systematic approach is needed to design cooperative workflows. Here, an iterative, user-centred development cycle is presented for interactive human-robot applications, complementing traditional automation. Virtual reality development is applied to evaluate the workflows to be defined and to develop a more efficient overall design cycle. KW - ALLOCATION KW - human-robot assembly cell KW - hybrid automation KW - IMMIGRANTS KW - interactive workflows KW - SYSTEMS KW - task assignment KW - virtually supported development Y1 - 2017 IS - 5 SP - 34 EP - 42 PB - DIV DEUTSCHER INDUSTRIEVERLAG GMBH ER - TY - CHAP A1 - Höcherl, Johannes A1 - Adam, Andreas A1 - Schlegl, Thomas A1 - Wrede, Britta T1 - Human-Robot Assembly: Methodical Design and Assessment of an Immersive Virtual Environment for Real-World Significance T2 - 2020 25th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA): 8-11 Sept. 2020, Vienna, Austria N2 - Virtual reality is a powerful tool for industrial applications. The article at hand addresses designers of industrial virtual environments. It summarizes key aspects to design immersive and coherent virtual environments. Furthermore, relevant influencing factors for a high quality virtual environment and tools to quantify this quality are presented. So far, a methodology to design, evaluate, and transfer knowledge from virtual environments into reality has been missing and is of high value for industrial applications. The proposed methodical approach includes the steps application analysis, technology selection and integration, design of virtual environment, evaluation of simulator quality, as well as discussion of the real-world validity. The method is shown on the example of a virtual human-robot working cell used to analyze the human perception of robot behavior during mutual assembly processes. The quality of the virtual environment is evaluated to be adequate for those purposes and the transfer of knowledge gained in virtuality on a corresponding real-world application is discussed. To the best of our knowing a system like the presented one, including full-body tracking, finger tracking, a virtual avatar and a head-mounted display has not been used for industrial use cases and human-robot cooperation before. KW - assembly KW - Avatars KW - coherent virtual environment KW - Conferences KW - Design methodology KW - fidelity KW - Head-mounted displays KW - human-robot cooperation KW - immersive KW - industrial applications KW - Knowledge transfer KW - Manufacturing automation KW - real-world validity KW - Robots KW - simulator quality KW - system design KW - virtual environments KW - Virtual reality Y1 - 2020 U6 - https://doi.org/10.1109/ETFA46521.2020.9212039 SP - 549 EP - 556 PB - IEEE ER - TY - CHAP A1 - Pohlt, Clemens A1 - Schlegl, Thomas A1 - Wachsmuth, Sven T1 - Human Work Activity Recognition for Working Cells in Industrial Production Contexts T2 - 2019 IEEE International Conference on Systems, Man and Cybernetics (SMC), 6-9 Oct. 2019, Bari, Italy N2 - Collaboration between robots and humans requires communicative skills on both sides. The robot has to understand the conscious and unconscious activities of human workers. Many state-of-the-art activity recognition algorithms with high performance rates on existing benchmark datasets are available for this task. This paper re-evaluates appropriate architectures in light of human work activity recognition for working cells in industrial production contexts. The specific constraints of such a domain is elaborated and used as prior knowledge. We utilize state-of-the-art algorithms as spatiotemporal feature encoders and search for appropriate classification and fusion strategies. Furthermore, we combine keypoint-based with appearance-based approaches to a multi-stream recognition system. Due to data protection rules and the high effort of data annotation within industrial domains only small datasets are available that reflect production aspects. Therefore, we use transfer learning approaches to reduce the dependency on data volume and variance in the target domain. The resulting recognition system achieves high performance for both singular person action and human-object interaction. KW - Activity recognition KW - Pose estimation KW - Robots KW - Task analysis KW - Three-dimensional displays KW - Two dimensional displays Y1 - 2019 U6 - https://doi.org/10.1109/SMC.2019.8913873 SP - 4225 EP - 4230 ER - TY - CHAP A1 - Lang, Jonas A1 - Schlegl, Thomas ED - Kubota, Naoyuki ED - Kiguchi, Kazuo ED - Liu, Honghai ED - Obo, Takenori T1 - Camera-Projector Calibration - Methods, Influencing Factors and Evaluation Using a Robot and Structured-Light 3D Reconstruction T2 - Intelligent Robotics and Applications N2 - As camera and projector hardware gets more and more affordable and software algorithms more sophisticated, the area of application for camera-projector configurations widens its scope. Unlike for sole camera calibration, only few comparative surveys for projector calibration methods exist. Therefore, in this paper, two readily available algorithms for the calibration of those arrays are studied and methods for the evaluation of the results are proposed. Additionally, statistical evaluations under consideration of different influencing factors like the hardware arrangement, the number of input images or the calibration target characteristics on the accuracy of the calibration results are performed. Ground truth comparison data is realized through a robotic system and structured light 3D scanning. KW - 3D scanning KW - Evaluation methods KW - Extrinsic error KW - Projector-camera calibration KW - Reconstruction error KW - Reprojection error KW - Robotic measurement KW - Structured light Y1 - 2016 SN - 978-3-319-43517-6 U6 - https://doi.org/10.1007/978-3-319-43518-3_40 VL - 9835 SP - 413 EP - 427 PB - Springer CY - Cham ER -