Direct measurement of yarn mass with 1mm accuracy using capacitive sensors (2009)
Carvalho, Vítor, Monteiro, João L., Vasconcelos, Rosa, Oliveira, Filomena
In Textile production, measurement of yarn mass in 1mm range is of utmost importance to evaluate evenness correctly, as several irregularities occur in 1mm to 4mm yarn length. Direct measurements in...
Measurement and analysis of needle penetration forces in industrial high-speed sewing machine (2009)
Carvalho, Helder, Rocha, A. M., Monteiro, João L.
The industrial manufacturing of sewn products has always been one of the critical processes of the textile chain concerning quality assurance. Assuring the appropriate set-up and operation of all the...
Instantiation of a Classification System Framework that Facilitates Reuse (2009)
Sérgio F. Lopes, Adriano C. Tavares, João L. Monteiro, Carlos A. Silva
Abstract—Frameworks are a key technology to reduce software development costs and shorten the time-to-market. However, framework complexity presents reuse problems that limit its success as an...
Textile sensors for ECG and respiratory frequency on swimsuits (2009)
Silva, Marcos, Catarino, André P., Carvalho, Helder, Rocha, Ana, Monteiro, João L., Montagna, Gianni
Swimming constitutes one of the most demanding sports regarding technique. Years of training are necessary to master each one of the four styles. An important improvement and help for trainers would...
Parameter monitoring and control in industrial sewing machines : an integrated approach (2008)
Carvalho, Helder, Silva, Luís F., Monteiro, João L., Rocha, A. M.
The industrial manufacturing of sewn products has always been one of the critical processes of the textile chain concerning quality assurance. Assuring the appropriate set-up and operation of all the...
Yarn evenness parameters evaluation : a new approach (2008)
Carvalho, Vítor, Monteiro, João L., Oliveira, Filomena, Vasconcelos, Rosa
This paper presents MPSI (Mass Parameterization System), an automatic system for determination of mass characteristics of textile yarn. It is based on 1 mm parallel capacitive sensors, working online...
Texture cue based tracking system using wavelet transform and a fuzzy grammar (2007)
Ferreira, Manuel, Santos, Cristina, Monteiro, João L.
This paper addresses a system for fast object tracking based on texture cues, by using the wavelet transform and a fuzzy grammar classifier. The method is based on wavelet type features. The feature...
Texture segmentation based on fuzzy grammar for cork parquet quality control (2007)
Ferreira, Manuel, Santos, Cristina, Monteiro, João L.
This paper presents an approach for image texture segmentation based on the wavelets transform and on a fuzzy grammar inference system. It was developed for the Portuguese cork industry, specifically...
Design and description of a classification system framework for easier reuse (2007)
Lopes, Sérgio, Tavares, Adriano, Monteiro, João L., Silva, Carlos A.
Frameworks are an important technology to reduce software development costs and shorten the time-to-market. However, framework complexity presents re-use problems that limit its success as an...
An architectural model for small-scale component-oriented frameworks (2007)
Lopes, Sérgio, Tavares, Adriano, Monteiro, João L., Silva, Carlos A.
Frameworks are an important form of reuse. However, they are often complex and hard to understand, what limits their success as a reuse option. To answer this problem, it has been widely recognized...
Instantiation of a classification system framework that facilitates reuse (2007)
Lopes, Sérgio, Tavares, Adriano, Monteiro, João L., Silva, Carlos A.
Frameworks are a key technology to reduce software development costs and shorten the time-to-market. However, framework complexity presents reuse problems that limit its success as an application...
Yarn : mass measurement with 1-mm length samples (2006)
Pinto, José G., Carvalho, Vítor, Monteiro, João L., Vasconcelos, Rosa, Oliveira, Filomena
In textile production, measurement of yarn mass in the 1-mm range is of utmost importance to properly evaluate evenness, as several irregularities occur in 1—4-mm yarn Iength. Direct measurements...
Catarino, André P., Rocha, A. M., Monteiro, João L., Oliveira, Filomena
This paper reports the recent developments in the pursuit to correctly locate, identify and distinguish faults during production of weft knitted fabrics. For this purpose a major textile parameter...
Describing framework static structure : promoting interfaces with UML annotations (2006)
Lopes, Sérgio, Tavares, Adriano, Monteiro, João L., Silva, Carlos A.
Frameworks are an important form of reuse that can help to significantly decrease the time and cost of application development. Although widely known, there are still some difficulties associated...
Application development by reusing object-oriented frameworks (2005)
Lopes, Sérgio, Silva, Carlos A., Tavares, Adriano, Monteiro, João L.
Object-oriented frameworks are an important form of reuse that can help to decrease significantly the application development time and cost. Although widely known, there are still some difficulties...
Knitting process surveillance using time and frequency analysis (2005)
Catarino, André P., Rocha, A. M., Monteiro, João L., Oliveira, Filomena
This paper will present and discuss the two major techniques used when inspecting an important parameter of the weft knitting industry: yarn input tension. The two techniques are frequency and time...
Development of embedded systems using OORT : a case study (2005)
Lopes, Sérgio, Silva, Carlos A., Tavares, Adriano, Monteiro, João L.
The development of embedded systems requires both tools and methods which help the designer to deal with the higher complexity and tougher constraints due to the different hardware support, the often...
Catarino, André P., Rocha, A. M., Monteiro, João L., Oliveira, Filomena
The Yarn Input Tension - YIT is one of the most important parameters in weft knitting industry. This parameter must be maintained between limits in order to produce knitted fabric without faults....
Carvalho, Helder, Rocha, A. M., Monteiro, João L., Silva, Luís
Comunicação apresentada na International Conference on Industrial Technology, Hammamet, Tunisia, 8 - 10 Dezembro 2004.
Extending argoUML© for real-time UML® (2004)
Lopes, Sérgio, Silva, Carlos A., Tavares, Adriano, Monteiro, João L.
The “UML Profile for Schedulability, Performance and Time Specification” (UML-SPT) is an extension of the Unified Modeling Language™ (UML) for the real-time domain, defined by the Object...
Catarino, André P., Rocha, A. M., Monteiro, João L., Oliveira, Filomena
From the production manager point of view, the knowledge of how well a knitting machine is working during production is very important. This information allows the manager to schedule all plans and...
A New system for monitoring and analysis of the knitting process (2004)
Catarino, André P., Rocha, A. M., Monteiro, João L., Oliveira, Filomena
Production monitoring is an important task for proper production planning. For this task the information that a system of this nature can possibly gather assumes significant importance. Among all the...
Techniques for unveiling faults during knitting production (2004)
Catarino, André P., Rocha, A. M., Monteiro, João L., Oliveira, Filomena
Detection of faults during production of knitted fabric is crucial for improved quality and productivity. The yarn input tension is an important parameter that can be used for this purpose. This...
Advancements in on-line monitoring and control of parameters in knitting and sewing processes (2004)
Carvalho, Helder, Catarino, André P., Carvalho, Miguel, Silva, Luís, Ferreira, Fernando, Rocha, A. M., ...
This paper presents a summary of the developments in process control in textile processes at the University of Minho, by a multidisciplinary research group involving three different departments...
Yarn parameterization based on mass analysis (2003)
Carvalho, Vítor, Pinto, José G., Monteiro, João L., Vasconcelos, Rosa, Oliveira, Filomena
The aim of this paper is to present a new experimental procedure to evaluate yarn characteristics, in real time, using capacitive sensors with a width below 8 mm (commercial equipments use 8 mm...
Signal feature extraction for sewing analysis using non-linear tecniques (2003)
Carvalho, Helder, Ferreira, Pedro, Rocha, A. M., Monteiro, João L.
Comunicação apresentada no International Symposium on Industrial Electronics, Rio de Janeiro, Brasil, 9 - 11 Junho 2003.
Actuation, monitoring and control of fabrics feeding during high-speed sewing (2003)
Silva, Luís, Lima, Mário, Carvalho, Helder, Rocha, A. M., Ferreira, Fernando, Monteiro, João L., ...
For some years now the fabrics feeding system of an industrial overlock sewing machine has been studied at the University of Minho, gathering different background researchers at the Laboratory of...
Process control in next-generation sewing machines : a project overview (2003)
Carvalho, Helder, Rocha, A. M., Monteiro, João L.
The sewing machine created in the XIX century has roughly remained unchanged in its basic technologies. Although a great range of mechanical and electronic technologies has boosted its development...
Mediação online da irregularidade do fio (2003)
Carvalho, Vítor, Pinto, José G., Monteiro, João L., Vasconcelos, Rosa, Oliveira, Filomena
Apresenta-se neste artigo um estudo realizado no âmbito de um projecto de investigação, que tem como objectivo efectuar a medição da irregularidade do fio têxtil usando sensores capacitivos. A...
Actuation, monitoring and closed-loop control of sewing machine presser foot (2003)
Silva, Luís, Lima, Mário, Carvalho, Helder, Rocha, A. M., Ferreira, Fernando, Monteiro, João L., ...
Sewing is one of the most important processes in the apparel industry for the production of high-quality garments. Although some research and improvements have been carried out in this area, the...
Planning, control and monitoring tools for industrial garment assembly processes (2003)
Carvalho, Helder, Rocha, A. M., Monteiro, João L., Silva, Luís
Garment construction is a complex process due to the properties of the textile materials. Furthermore it still relies on human operators in most of the material handling and process monitoring. On...
Continuous environmental adaptation of a speech recognizer in telephone line conditions (2002)
Lima, C. S., Almeida, Luís B., Monteiro, João L.
This paper presents a maximum likelihood (ML) approach, relative to the background model estimation, in noisy acoustic non-stationary environments. The external noise source is characterised by a...
Lima, C. S., Almeida, Luís B., Monteiro, João L.
This paper presents a spectral normalisation based method for extraction of speech robust features in additive noise. The method has two main goals: 1) The “peaked” spectral zones, where the most...
A robust feature extraction for automatic speech recognition in noisy environments (2002)
Lima, C. S., Almeida, Luís B., Monteiro, João L.
This paper presents a method for extraction of speech robust features when the external noise is additive and has white noise characteristics. The process consists of a short time power normalisation...
Simulation and targeting using OORT (2001)
Lopes, Sérgio, Monteiro, João L.
The development of embedded systems requires both tools and methods which help the designer to deal with the higher complexity and tougher constrains due to the different hardware support, the often...
Modelling a real-time system using object-oriented techniques (2000)
Lopes, Sérgio, Monteiro, João L.
Real-time systems have higher complexity and impose tougher constrains in the development process due to the different hardware support, the often distributed topology and time requirements. The...
Developing an automated system for shoe sole halogenation (1997)
Sepúlveda, João, Couto, Carlos, Monteiro, João L.
This paper describes a project developed in the Department of Industrial Electronics for a shoe wear manufacturer. It envisaged the study and automation of a human operated position of a shoe...