Augmented Reality System to Help Train New Skilled Workers for PCB Inspection

Printed circuit board (PCB) inspection is one of the major requirements in electronic industry, as in the last decades, a number of innovative methods have been designed and implemented. Due to various reasons, many companies are still using skilled workers instead of fully automated systems for PCB inspection. As the training of new workers is time and recourse consuming, this paper presents an augmented reality based system, which provides an additional aid by presenting discrete information gathered from the experience of skilled workers. Keywords: Printed Circuit Board, Augmented Reality, Computer Vision, Automated Visual Inspection

The Need and Obstacles in Collaborative Engineering

The purpose of this paper is to explain the need for collaboration and to investigate the obstacles in collaborative engineering. The first part is about defining the term collaboration. The second part focuses on the information outside the domain of engineering which could prove to be valuable to this field as well. The final part shows different obstacles in collaborative engineering

Welded Construction Design of Transition Fittings from Metal Pipes to Plastic Pipes

Transition type fittings are components often used in facilities where fluids are transported that allow the passage from a high density polyethylene (HDPE) pipe to a steel pipe. In the presented studies, four types of transition fittings were analyzed in the first stage. The four types of transition fittings are distinguished by the shape of their welded steel construction. The performed analyses took into account testing the behavior upon exposure to fatigue, measuring the HDPE hardness and applying the finite element method (FEM). As a result of these studies it was demonstrated that the form of the welded steel construction has a very great influence on the operating behavior of the transition fitting. Thus, a new transition fitting with a welded steel construction was designed. In this new type of transition fitting, an approximately 50% increase in resistance to fatigue stress, an approximately 90% reduction in stress in the part material and a reduction in the hardness of the material in HDPE pipes was obtained. The studies allow not only an improvement of the characteristics for these types of parts, but also the optimization of other types of steel-plastic joints

Robotized semiautomatic motorcycle transmission development. Electronic and software design

In this paper, we propose an electrical design (implemented on a PCB board) and an accompanying software design for controlling the automatic gear change. The designs complement the mechanical solutions developed in Part 1. The paper also analyses the issues encountered during the intermediate steps of the development of the electronic module, which is expected to be small and adaptable enough to be installed on a motorcycle without changing its ergonomics. The control software runs on the Arduino Nano board and is built as a state machine with one idle state, five active states that cover different stages of the gear change and one error state for preventing malfunctions in case of an unexpected event. The sketch uses 5,760 bytes (or 18%) of program storage space and 706 bytes (or 34%) of the dynamic memory