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Evaluation of augmented reality in a manufacturing environment : A feasibility studyHolstensson, Erik, Hamid, Ram, Jundi, Sarbast January 2018 (has links)
Augmented Reality (AR) is a fast-emerging technology and it has been applied in many fields e.g. education, health, entertainment, gaming and tracking systems in logistics. AR technology combines the virtual world with the reality by superimposing digital information onto the physical world. This study evaluates the usability of the AR in industrial environment focusing on effectiveness, efficiency, and user acceptance in comparison to other instructional medium e.g. paper-based instructions or manuals. An AR prototype was developed to be used in the usability evaluation. To evaluate the AR application in the field of industry an experiment was conducted. To get the user experience and acceptance questionnaires and interviews were used involving real assembly workers where they used the AR prototype. The results of the study show that when using AR as assistance in the assembly assurance process, the number of faults and task completion time were reduced significantly compared to the traditional methods. Also, the users had a positive attitude and a high level of satisfaction when using AR.
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Simuleringsverktyg för toleransoptimering / Simulation tool for tolerance optimizationGredic, Adela, Tasci, Gabriella January 2019 (has links)
Målet med detta examensarbete har varit att utvärdera ett simuleringsverktyg för toleranskedjeanalyser i 1D, följt av en jämförelse med dagens metod att beräkna toleranskedjor i 1D med kalkylark i Excel. Simuleringsverktyget heter EZtol och har funnits sedan ett och ett halvt år tillbaka. Examensarbetet utfördes på uppdrag från Scania CV AB, som ville undersöka om mjukvaran kan ersätta den nuvarande metoden. Examensarbetet utfördes under 10 veckor och delades upp i tre huvudområden: Upplärning i form av webkurs och internkurs på Scania, simulering av olika toleranskedjor i mjukvaran samtidigt som beräkningar i kalkylark gjordes och till sist rapportskrivning. Rapporten är uppdelad i sex kapitel. I det första kapitlet beskrivs bakgrunden till problemet, mål och syfte. Det andra kapitlet redogör för nuläget som påvisar att det finns ett visst behov av en mjukvara. Konstruktörer intervjuades för att få en bild över vilka behov som inte uppfylldes i kalkylarket. Dessa visade sig främst sig vara grafisk visualisering och bidragslista över toleranser (en lista som visar vilka toleranser som påverkar utfallet mest). I det tredje kapitlet beskrivs teorierna som använts som grund till arbetet. Teorierna är Användarguiden i EZtol, Grundläggande om toleranser, toleranskedjor, Simulering och CATIA V5. I kapitel fyra beskrivs genomförandet vilket till största del bestått av upplärning samt simulering i mjukvaran. Det femte kapitlet redogör resultatet vilket presenteras i form av för- och nackdelar. De främsta fördelarna har visat sig vara grafisk visualisering av toleranskedjor samt bidragslista över toleranser. Dock visade det sig att den främsta nackdelen var att mjukvaran inte klarar av att hantera långa och mer komplicerade toleranskedjor, vilket har lett till slutsatsen att mjukvaran inte rekommenderas till Scania i dagsläget. Scanias krav uppfylls inte då mjukvaran inte kan hantera företagets alla toleranskedjor. Men eftersom konceptet kring EZtol är intressant bedöms ändå mjukvaran ha potential att passa in på Scania om några år. En rekommendation är därför att simuleringsmjukvaran bör utvärderas om på nytt i framtiden. / The aim with this thesis work has been to evaluate a simulation tool for 1D-analysis of tolerancechains, followed by a comparison with the current method to calculate tolerance-chains in 1D with spreadsheets in Excel. The simulation tool is named EZtol and has existed for one and a half year. The thesis work has been carried out on assignment from Scania CV AB. The company wanted us to evaluate if the software could replace the current method. The thesis work has been carried out during 10 weeks and was divided in three main sections: Education in terms of a web-course and internal course, simulation of different tolerance-chains in the software as well as calculations in the spreadsheet and finally make a scientific report based on the thesis work. The essay is divided in six chapters. The first chapter describes the background, aim and purpose of the thesis work. The second chapter describes how the situation of tolerance-chain calculations looks today, which has shown that there is a certain need of a software. The designers were interviewed so that the thesis workers could establish what the spreadsheet could not fulfill, which was graphic visualization of tolerance-chains and also a list with the contributions of all tolerances. The third chapter describes the theories that have been used for this thesis work. The theories are Tutorial in EZtol, Fundamental facts about tolerances and tolerance‐chains and Simulation and CATIA V5. In the fifth chapter the results of this thesis work are featured, which are presented as advantages and disadvantages. The main advantages with the software are graphic visualization of the tolerance-chains as well as a list that shows the contributions of every tolerance. The primary disadvantage though is that the software cannot handle long and more complicated tolerance-chains. Which has led to the conclusion that the thesis workers do not recommend the software to Scania at present time. Scanias requirements cannot be fulfilled with the software because it has not been able to handle all of Scanias tolerance-chains. But since the EZtol concept is good the software is estimated to potentially fulfill Scanias needs in a few years. A recommendation is that the software ought to be reexamined in the future.
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