196 documents found, page 1 of 20
Design of a yarn analysis mechatronic prototype for textile industry
Pereira, Filipe; Machado, José; Soares, Filomena; Vasconcelos, Rosa; Carvalho, VítorPortuguese textile industry faces challenges in a globalized market, needing enhanced competitiveness and superior product quality. The quality of textile products heavily relies on yarn excellence, demanding precise evaluation against predefined parameters. Despite advancements, existing yarn evaluation devices struggle with limitations like high costs, bulkiness and imprecise assessments. To overcome these ch...
Descoberta de conhecimento em dados de mobilidade urbana: um exemplo de intelig...
Alves, Carlos; Mendes, Luís; Costa, José; Machado, José; Machado, RicardoNos Açores, tal como em Portugal Continental, as cidades inteligentes (as conhecidas smart-cities) continuam a enfrentar enormes desafios. Estes incluem a melhoria da infraestrutura tecnológica e da sua governança, que visa aumentar o envolvimento e a inclusão dos cidadãos e das instituições. Um dos principais desafios é a promoção da mobilidade dos cidadãos para melhorar a sua qualidade de vida e fomentar o se...
Modelling and simulation of a Pick&Place system using modelica modelling langua...
Monteiro, Alberto; Pereira, Filipe; Santos, Adriano A.; Machado, José; Oliveira, MiguelModelica is a powerful modelling language for modelling and simulation of Multiphysics Engineering Systems behaviour. This work explores a model to be implemented in the control design of a 6-axis industrial manipulator whose structure approaches the robotic arm ABB IRB 140, through inverse kinematics calculation. The significance of an inverse kinematics model is to bring accuracy to the reference inputs into ...
An Energy Storage System for the Alto Douro Wind Power Plant: A Technical Study
Magalhães, Alexandre; Xavier, Celso; Felgueiras, Carlos; Pereira, Filipe; Almeida Santos, Adriano Manuel; da Silva, A. Ferreira; Silva, PauloRenewable energies are crucial to meeting global demand for environmentally friendly energy at a time when fossil fuels are being cut back. In recent years, and essentially due to the reduced reserves of fossil fuels, Portugal has been promoting investment in renewable energies as a way of freeing itself from energy imports and dependence on fossil fuels. However, despite the high number of hours of sunshine pe...
Integration of Artificial Vision and Image Processing into a Pick and Place Col...
Santos, Adriano A.; Schreurs, Cas; Silva, António Ferreira da; Pereira, Filipe; Felgueiras, Carlos; Lopes, António M.; Machado, Josén the field of robotics, pick and place applications are becoming increasingly popular due to their ability to automate repetitive tasks that can create temporary or permanent injuries. To enhance the efficiency of these applications, object recognition using a fixed camera or one mounted on a robotic hand has been employed. This paper explores the possibilities of implementing a low-cost camera into a collabor...
Simulation approach for solving production problems reducing total processing time
Pereira, Sibelle; Henriques, Marcelo Filipe Nunes; Varela, M.L.R.; Vicente, José; Freitas, Luis; Machado, JoséThis paper presents an application of computational simulation to a production problem on unrelated parallel machines and dependent setup times, aiming at the reduction of jobs’ total processing time (makespan). The scenarios studied by Rabadi, et al. (2014) were used, along with the SIMIO simulation software, to model and conduct experiments to study the impact of a set of sequencing rules. Based on the comput...
Development of a foam-filled steel web sandwich panel for the rehabilitation of...
Gontijo, Guilherme Lopes; Filho, Marco Antonio Santiago Abreu; Benzo, Pier Giovanni; Pereira, João Miguel; Machado, José; Denchev, Z.; Sena-Cruz, JoséLightweight sandwich panels offer a prominent solution for the rehabilitation of timber floors. This paper addresses the development of a solution capable of continuous production for a foam-filled steel web sandwich panel for floor rehabilitation. The newly designed flooring solution is tested in full-scale quasi-static flexural campaigns. The tests validate the analytical design’s compliance with Ultimate lim...
Vision inspection design for systematic production of needle beds: an industria...
Freitas, Luis; Malheiro, M. Teresa; Gonçalves, A. Manuela; Vicente, José; Pereira, Filipe; Morais, Francisco; Bessa, João; Machado, JoséThe increasingly standards of the electronic industry, especially in Printed Circuit Boards, make In-Circuit-Test Machines one of the most important systems on the production lines. With this, the pressure on the In-Circuit-Test Machines production to meet this strict requirements it is getting bigger every day. To react to this pressure it is necessary to update, in a technological point of view, the manufactu...
Online yarn hairiness– Loop & protruding fibers dataset
Pereira, Filipe; Pinto, Leandro; Soares, Filomena; Vasconcelos, Rosa; Machado, José; Carvalho, VítorThis paper introduces an online dataset focused on detect- ing hairiness in yarn, including loop and protruding fibers. The dataset is designed for use in assessing artificial intelli- gence algorithms. The dataset consists of 684 original images. Through augmentation, this number increases to 1644, with 11,037 annotations derived from videos featuring 56.4tex pur- ple cotton yarn. The videos were captured duri...
Electrification of a remote rural farm with solar energy: Contribution to the d...
Santos, Adriano A; Pereira, Filipe; Silva, António Ferreira da; Caetano, Nídia; Felgueiras, Carlos; Machado, JoséRural farms constitute a vital component of a country’s agricultural landscape, traditionally reliant on energy installations known for their reliability yet notorious for their energy-intensive and inefficient characteristics. While the smart farm concept, integrating renewable energy sources and resource management technologies, has seen widespread adoption in domestic and industrial sectors, rural farms have...