This is a bachelor's thesis in the area of electrical engineering as well as automation. This thesis investigates motor choice, sensor choices, and the methodology of automating a grocery store picking system prototype. The general structure of the system is composed out of two shelfs with a plane, between them, that is movable in the vertical direction. On the movable plane a conveyor belt was installed. We evaluated the motor choice for the application and the safety aspects of the system to gather a general understanding of potential risk factors involved in realizing a system that can work autonomously. It includes both electrical safety factors as well as mechanical safety factors. Additionally, we considered safety precautions to prevent malfunctions that can lead to these risks. To realize the prototype, a prestudy to investigate motor alternatives was conducted to determine the best motor choice for the application. The chosen motor was a DC steppermotor with snail gearbox. This will ensure simple regulation of the motor to sufficiently handle the weights the system needs to manage. The snail gearbox can eliminate some mechanical risk factors due to its self-locking mechanism, ensuring that if there is an electrical malfunction, such as a power failure, the system will not collapse on itself and drop the payload flat on the floor. Also, a model of the large prototype was made in a 3D-drawing software, which was then 3D-printed and set up to mimic the large prototype. The goal of the miniature model is to test the functionality and evaluate if the algorithms described in this thesis can be preserved and re-used for the large system and prototype.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-205653 |
| Date | January 2024 |
| Creators | Wennerbo, Theodor, Bildhjerd, Martin C. |
| Publisher | Linköpings universitet, Reglerteknik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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