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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Dynamic Mixed Reality AssemblyGuidance Using Optical Recognition Methods

Guðjónsdóttir, Harpa Hlíf, Ólafsson, Gestur Andrei January 2022 (has links)
Mixed Reality (MR) is an emerging paradigm in industry. While MR equipment and software have taken great technological strides in past years, standardized methods and workflows for developing MR systems for industry have not been widely adopted for many tasks. This thesis proposes a dynamic MR system for an assembly process. Optical recognition methods are explored to drive the application logic. The systemis developed using the Unity platform for the HoloLens 2. The software tools Vuforia Engine and Mixed Reality Toolkit (MRTK) are utilized. The project work concludes with an application capable of guiding users using graphics and audio. Successful methods are realized for calibrating the application logic for dynamic object positions,as well as for validating user actions. Experiments are conducted to validate the system. Subjects complete a different assembly process using paper instructions as guidance before using the MR application. Qualitative results regarding the MR experience are obtained through a questionnaire subjects answer, where the experience using paper instructions serves as a benchmark. Data obtained from an experienced user completing the assembly process is used as a quantitative benchmark for system performance measures. All subjects were able to complete the assembly tasks correctly using the MR application. Results show significantly better system performance for the experienced user compared to subjects unfamiliar with the MR system. Vuforia Engine recognition tools successfully tracked individual components that meet a specific criterion. Methods for validating user actions using Vuforia Engine software tools and the HoloLens’s internal hand tracking capabilities resulted in a high validation success rate. The thesis concludes effective training methods for the specific assembly scenario, although not robust for general implementation. / Mixed Reality (MR) är ett framväxande paradigm inom industrin. Medan tillbehör och programvara för MR har gjort enorma framsteg under det senaste decenniet, har standardiserade metoder och arbetsflöden för utveckling av MR applikationer i industriella kontexter inte använts i lika stor utsträckning. Det här examensarbetet utvecklar och proponerar en dynamisk MR applikation för en monteringsprocess. Optiska valideringsmetoder utforskas för att använda applikationen. Applikationen är utvecklad med hjälp av Unity game engine för HoloLens 2. Programvaran Vuforia Engine och MRTK är utnyttjad. Projektarbetet resulterade i en applikation som kan vägleda användare med hjälp av ljud och grafik. Framgångsrika metoder implementerades för att kalibrera applikationslogiken av dynamisk objektspositionering, samt för att validera användarens rörelser. Ett experiment utfördes för att validera MR applikationen där deltagare genomförde en monteringsprocess med hjälp av pappersinstruktioner, vilket används som ett kvalitativt riktmärke. Mätningar av en erfaren applikationsanvändare har använts som ett kvantitativt riktmärke för mätning av systemmässigt utförande. Alla deltagare kunde utföra monteringsuppgifterna korrekt med hjälp av MR applikationen. Resultaten visar betydligt bättre utförande för den erfarna användaren jämfört med personer som inte är bekanta med MR systemet. Spårning av enskilda objekt med hjälp av Vuforia Engine igenkänningsverktyg var framgångsrikt för komponenter som uppfyller ett specifikt kriterium. Metoder för att validera användarens rörelser med programvaran Vuforia Engine samt HoloLens interna handspårningsfunktion gav mycket framgångsrika resultat vid validering. Sammanfattningsvis kom studien fram till effektiva upplärningsmetoder för det här monteringsscenariot, även om de inte var robusta nog för generell implementering.
2

Mixed reality for assembly processes, programming and guiding

Peirotén López de Arbina, Borja, Romero Luque, Elisabeth María January 2023 (has links)
Assembly processes are an integral part of many industries, including manufacturing and production. These processes typically involve the use of robots and automated equipment to perform tasks such as picking, placing, and joining components. One solution is Mixed Reality (MR), which combines virtual and real-world elements to create an immersive environment for the operator. MR technology can be used to guide operators through the assembly process, providing real-time feedback and instructions, as well as allowing them to program the assembly process and adjust as needed.  The project was focused on developing a user interface for the Hololens 2 glasses that would allow operators to select different tools and robots and configure targets and processes for an assembly station. The team also developed a system to send information about targets, paths, and joint values to the virtual and real robot, which allowed operators to easily program the robot to perform the assembly process. It was possible to develop and test the MR system in a real-world assembly setting, evaluating its effectiveness in improving the efficiency and accuracy of the process. This project wants to demonstrate the potential of MR technology for improving assembly processes and to provide a proof-of-concept for future development in this field. / <p>Utbytesstudenter</p>

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