2013
Autores
Silva, MF; Barbosa, RS; Oliveira, ALC;
Publicação
Intelligent Systems, Control and Automation: Science and Engineering
Abstract
This paper presents a climbing robot, with wheeled locomotion and adhesion through permanent magnets. This machine was developed to be used in the inspection of several types of man-made ferromagnetic structures, such as towers for wind turbines, fuel storage tanks, ship hulls, etc., in order to, for instance, detect weaknesses due to corrosion. In this article are presented the main aspects taken into consideration for its design, as well as several constructive aspects, among which are detailed its mechanical and electrical construction, the implemented control architecture and the Human-Machine Interface (HMI) for its control. The distinguishing characteristic of this robot is its dynamic adjustment system of the permanent magnets to assure the machine adhesion to the surfaces when crossing slightly irregular and curved surfaces with a large radius. © 2013, Springer Science+Business Media Dordrecht.
2013
Autores
Moura, Marcos; Tasa, Mihkel; Olejniczak, Olga Agata; Ahmad, Naeem; Silva, António Ferreira da; Malheiro, Benedita; Silva, Manuel F.; Ribeiro, Maria Cristina; Caetano, Nídia Sá; Ferreira, Paulo; Guedes, Pedro;
Publicação
1st International Conference of the Portuguese Society for Engineering Education
Abstract
Waste oil recycling companies play a very important
role in our society. Competition among companies is tough and
process optimization is essential for survival. By equipping oil
containers with a level monitoring system that periodically reports
the level and alerts when it reaches the preset threshold, the oil
recycling companies are able to streamline the oil collection process
and, thus, reduce the operation costs while maintaining the quality of
service. This paper describes the development of this level
monitoring system by a team of four students from different
engineering backgrounds and nationalities. The team conducted a
study of the state of the art, draw marketing and sustainable
development plans and, finally, designed and implemented a
prototype that continuously measures the container content level and
sends an alert message as soon as it reaches the preset capacity.
2013
Autores
Reimus, Aare; Miklaszewska, Izabela; Fernandez, Maria Ricondo; Jurjonaité, Toma; Silva, António Ferreira da; Malheiro, Benedita; Silva, Manuel F.; Ribeiro, Maria Cristina; Caetano, Nídia Sá; Ferreira, Paulo; Guedes, Pedro;
Publicação
1st International Conference of the Portuguese Society for Engineering Education
Abstract
Interactive products are appealing objects in a
technology-driven society and the offer in the market is wide and
varied. Most of the existing interactive products only provide
either light or sound experiences. Therefore, the goal of this
project was to develop a product aimed for children combining
both features. This project was developed by a team of four thirdyear
students with different engineering backgrounds and
nationalities during the European Project Semester at ISEP
(EPS@ISEP) in 2012. This paper presents the process that led to
the development of an interactive sound table that combines nine
identical interaction blocks, a control block and a sound block.
Each interaction block works independently and is composed of
four light emitting diodes (LED) and one infrared (IR) sensor.
The control is performed by an Arduino microcontroller and the
sound block includes a music shield and a pair of loud speakers. A
number of tests were carried out to assess whether the controller,
IR sensors, LED, music shield and speakers work together
properly and if the ensemble was a viable interactive light and
sound device for children.
2013
Autores
Veiga, G; Silva, C; Araujo, R; Pires, N; Siciliano, B;
Publicação
EXPERT SYSTEMS WITH APPLICATIONS
Abstract
This paper investigates the research profiles, collaboration patterns and research topic trends which can be identified in the proposals submitted to the ECHORD (European Clearing House for Open Robotics Development) FP7 project. On a country level, clusters were identified and characterized by patterns of proposal production per inhabitant, score and international cooperation. Belgium and Sweden constitute a cluster characterized by high proposal production, with very high scores and extensive international collaboration. Belgium also excels from another cluster analysis, being as the only country where 100% of proposals involve industry-academia cooperation and obtain scores above 10. Other findings show that single partner proposals have significantly lower quality than multi-partner proposals but, on the other hand, the number of countries involved shows no influence on the quality of the proposals. Despite the high number of industrial participants present on the proposals, it is observed that they play secondary roles in the proposals, with a very low number projects leaded by companies. Also, it is observed that partnerships between research institutions (non-universities) are the most successful. Concerning topics of the proposals, the technology human-robot interface and the product vision robot for small-scale manufacturing are the most significant. Finally, the paper shows clusters of institutions extracted from the giant network of relations obtained from the ECHORD set of proposals.
2013
Autores
Veiga, G; Malaca, P; Cancela, R;
Publicação
INTERNATIONAL JOURNAL OF ADVANCED ROBOTIC SYSTEMS
Abstract
This paper presents an interactive programming method for programming industrial robots in ceramic applications. The main purpose was to develop a simple but flexible programming system that empowers the user with product driven programming without compromising flexibility. To achieve this flexibility, a two step hybrid programming model was designed: first the user sketches the desired trajectory in a spatial augmented reality programming table using the final product and then relies on an advanced 3D graphical system to tune the robot trajectory in the final workcell. The results measured by the end-user feedback show that a new level of flexibility was reached for this type of application.
2013
Autores
Alves, P; Costelha, H; Neves, C;
Publicação
PROCEEDINGS OF THE 2013 13TH INTERNATIONAL CONFERENCE ON AUTONOMOUS ROBOT SYSTEMS (ROBOTICA)
Abstract
This article focuses on the localization and navigation of a mobile differential robot in an indoor office-like environment. These are fundamental issues to service robotics, which is a branch with a strong market growth. The work implements a vision tracking system, environment mapping, route planning and navigation for an autonomous robot application inside services buildings. One goal of the methodology is its application with low cost equipment. The test bed chosen was a Pioneer P3-DX robot [16] in a service building, with an attached USB webcam, pointed at the ceiling to take advantage of the position of the light fixtures as natural landmarks. The robot location is estimated through two distinct probabilistic methods: a particle filter, when there is no information about the starting location of the robot, and the Kalman filter, given the convergence of the particle filter. Both methods use the detection of light fixtures together with the robot kinematics as information to estimate the pose. The mapping of the environment and its obstacles is obtained from the localization estimates and the information gathered by ultrasound sensors, representing the entire navigation space discretized in the form of an occupation grid. Planning the navigation path is determined by a simple search algorithm, namely the Wavefront algorithm, based on the information contained in the occupancy grid. For a given path, navigation is performed with obstacle avoidance using the virtual forces method. Replanning is used to recover from local minima situations.
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