Microwave range had been widely used for heating processes. In this work theoretical and experimental results on manufacturing of expandable polystyrene using specific frequencies of 2.45 GHz are presented. Simulations of temperature distribution were performed using the software Comsol Multi-physics®. In order to increase the material absorption to microwaves, several solvents as ethanol, a mixture of ethanol/water and hydrogen peroxide were tested. Temperature distribution inside material was measured with an infrared laser sensor. Microwave heating allows Expanded Polystyrene Styrofoam (EPS) molding in 180 seconds, reaching a considerable manufacturing time reduction compared with traditional processes where drying time may take up to one day.
Teaching robotics is a challenge in many universities due to the mathematics concepts used in this area. In recent years, augmented reality has improved learning in several engineering areas. In this paper, a platform for teaching robotic arm manipulation concepts is presented. e system includes a homemade robotic arm, a control system, and the RAR@pp. e RAR@pp is focused on learning robotic arm manipulation algorithms by the detection of markers in the robotic arm and displaying in real time the values based on the data obtained by the control system. Details on the design of the platform are presented, and the related results are discussed. Experimental data about the usability of the application are also shown.
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