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Sobre

Sobre

Luis Rocha doutorado em Engenharia Electrotécnica e de Computadores pela Faculdade de Engenharia da Universidade do Porto em 2014. É investigador do INESC TEC desde 2010 e é actualmente responsável pela área de investigação de manipuladores industriais no Centro de Robótica Industrial e Sistemas Inteligentes (CRIIS ). Publicou mais de 40 artigos em revistas científicas internacionais e em conferências. Os seus principais interesses de investigação focam-se no desenvolvimento de sistemas robóticos industriais mais ágeis e centrados no ser humano, nomeadamente via a investigação de novos mecanismos interação homem-robô, novas metodologias de programação de robôs mais simplificadas e sistemas avançados de perceção. Foi coordenador da equipa do INESC que participou nos seguintes projetos: H2020 MARI4_YARD, Xweld (H2020 Trinitiy Cascade Funding), AI4R.WELD (H2020 ZDMP Cascade Funding), Interreg POCTEC 2014-2020 Manufactur4.0, P2020 PRODUTECH4S&C e PRODUTECH -SIF.

Detalhes

Detalhes

  • Nome

    Luís Freitas Rocha
  • Cargo

    Coordenador de Centro
  • Desde

    01 setembro 2010
046
Publicações

2025

Automated optical system for quality inspection on reflective parts

Autores
Nascimento, R; Rocha, CD; Gonzalez, DG; Silva, T; Moreira, R; Silva, MF; Filipe, V; Rocha, LF;

Publicação
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

Abstract
The growing demand for high-quality components in various industries, particularly in the automotive sector, requires advanced and reliable inspection methods to maintain competitive standards and support innovation. Manual quality inspection tasks are often inefficient and prone to errors due to their repetitive nature and subjectivity, which can lead to attention lapses and operator fatigue. The inspection of reflective aluminum parts presents additional challenges, as uncontrolled reflections and glare can obscure defects and reduce the reliability of conventional vision-based methods. Addressing these challenges requires optimized illumination strategies and robust image processing techniques to enhance defect visibility. This work presents the development of an automated optical inspection system for reflective parts, focusing on components made of high-pressure diecast aluminum used in the automotive industry. The reflective nature of these parts introduces challenges for defect detection, requiring optimized illumination and imaging methods. The system applies deep learning algorithms and uses dome light to achieve uniform illumination, enabling the detection of small defects on reflective surfaces. A collaborative robotic manipulator equipped with a gripper handles the parts during inspection, ensuring precise positioning and repeatability, which improves both the efficiency and effectiveness of the inspection process. A flow execution-based software platform integrates all system components, enabling seamless operation. The system was evaluated with Schmidt Light Metal Group using three custom datasets to detect surface porosities and inner wall defects post-machining. For surface porosity detection, YOLOv8-Mosaic, trained with cropped images to reduce background noise, achieved a recall value of 84.71% and was selected for implementation. Additionally, an endoscopic camera was used in a preliminary study to detect defects within the inner walls of holes. The industrial trials produced promising results, demonstrating the feasibility of implementing a vision-based automated inspection system in various industries. The system improves inspection accuracy and efficiency while reducing material waste and operator fatigue.

2025

Methodology and Challenges of Implementing Advanced Technological Solutions in Small and Medium Shipyards: The Case Study of the Mari4_YARD Project

Autores
Grazi, L; Feijoo Alonso, A; Gasiorek, A; Pertusa Llopis, AM; Grajeda, A; Kanakis, A; Rodriguez Vidal, A; Parri, A; Vidal, F; Ergas, I; Zeljkovic, I; Durá, JP; Mein, JP; Katsampiris-Salgado, K; Rocha, LF; Rodriguez, LN; Petry, MR; Neufeld, M; Dimitropoulos, N; Köster, N; Mimica, R; Fernandes, SV; Crea, S; Makris, S; Giartzas, S; Settler, V; Masood, J;

Publicação
Electronics

Abstract
Small to medium-sized shipyards play a crucial role in the European naval industry. However, the globalization of technology has increased competition, posing significant challenges to shipyards, particularly in domestic markets for short sea, work, and inland vessels. Many shipyard operations still rely on manual, labor-intensive tasks performed by highly skilled operators. In response, the adoption of new tools is essential to enhance efficiency and competitiveness. This paper presents a methodology for developing a human-centric portfolio of advanced technologies tailored for shipyard environments, covering processes such as shipbuilding, retrofitting, outfitting, and maintenance. The proposed technological solutions, which have achieved high technology readiness levels, include 3D modeling and digitalization, robotics, augmented and virtual reality, and occupational exoskeletons. Key findings from real-scale demonstrations are discussed, along with major development and implementation challenges. Finally, best practices and recommendations are provided to support both technology developers seeking fully tested tools and end users aiming for seamless adoption.

2025

Quality Inspection in Casting Aluminum Parts: A Machine Vision System for Filings Detection and Hole Inspection

Autores
Nascimento, R; Ferreira, T; Rocha, CD; Filipe, V; Silva, MF; Veiga, G; Rocha, L;

Publicação
Journal of Intelligent & Robotic Systems

Abstract
Abstract Quality inspection inspection systems are critical for maintaining product integrity. Being a repetitive task, when performed by operators only, it can be slow and error-prone. This paper introduces an automated inspection system for quality assessment in casting aluminum parts resorting to a robotic system. The method comprises two processes: filing detection and hole inspection. For filing detection, five deep learning modes were trained. These models include an object detector and four instance segmentation models: YOLOv8, YOLOv8n-seg, YOLOv8s-seg, YOLOv8m-seg, and Mask R-CNN, respectively. Among these, YOLOv8s-seg exhibited the best overall performance, achieving a recall rate of 98.10%, critical for minimizing false negatives and yielding the best overall results. Alongside, the system inspects holes, utilizing image processing techniques like template-matching and blob detection, achieving a 97.30% accuracy and a 2.67% Percentage of Wrong Classifications. The system improves inspection precision and efficiency while supporting sustainability and ergonomic standards, reducing material waste and reducing operator fatigue.

2025

Object segmentation dataset generation framework for robotic bin-picking: Multi-metric analysis between results trained with real and synthetic data

Autores
Cordeiro, A; Rocha, LF; Boaventura-Cunha, J; Pires, EJS; Souza, JP;

Publicação
Computers & Industrial Engineering

Abstract

2024

Inspection of Part Placement Within Containers Using Point Cloud Overlap Analysis for an Automotive Production Line

Autores
Costa, CM; Dias, J; Nascimento, R; Rocha, C; Veiga, G; Sousa, A; Thomas, U; Rocha, L;

Publicação
FLEXIBLE AUTOMATION AND INTELLIGENT MANUFACTURING: ESTABLISHING BRIDGES FOR MORE SUSTAINABLE MANUFACTURING SYSTEMS, FAIM 2023, VOL 1

Abstract
Reliable operation of production lines without unscheduled disruptions is of paramount importance for ensuring the proper operation of automated working cells involving robotic systems. This article addresses the issue of preventing disruptions to an automotive production line that can arise from incorrect placement of aluminum car parts by a human operator in a feeding container with 4 indexing pins for each part. The detection of the misplaced parts is critical for avoiding collisions between the containers and a high pressure washing machine and also to avoid collisions between the parts and a robotic arm that is feeding parts to a air leakage inspection machine. The proposed inspection system relies on a 3D sensor for scanning the parts inside a container and then estimates the 6 DoF pose of the container followed by an analysis of the overlap percentage between each part reference point cloud and the 3D sensor data. When the overlap percentage is below a given threshold, the part is considered as misplaced and the operator is alerted to fix the part placement in the container. The deployment of the inspection system on an automotive production line for 22 weeks has shown promising results by avoiding 18 hours of disruptions, since it detected 407 containers having misplaced parts in 4524 inspections, from which 12 were false negatives, while no false positives were reported, which allowed the elimination of disruptions to the production line at the cost of manual reinspection of 0.27% of false negative containers by the operator.

Teses
supervisionadas

2023

Automated Shoe Roughing Cell

Autor
David José Lucas Raposo

Instituição
INESCTEC

2023

Robotic System for Depalletization

Autor
João Pedro Gomes Costa

Instituição
INESCTEC

2023

Adaptive Grasping Planning: A Novel Unified and Modular Grasping Pipeline Architecture

Autor
João Pedro Carvalho de Souza

Instituição
INESCTEC

Development of robotic manipulators for scalable production lines

Autor
Paulo Diogo Carvalho Ribeiro

Instituição
INESCTEC

Cinemática Composta de Manipuladores Móveis

Autor
Gonçalo Daniel Ribeiro da Silva

Instituição
INESCTEC