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Wang H.P.,Nanjing University of Science and Technology | Vasseur C.,Lille University of Science and Technology | Christov N.,Lille University of Science and Technology | Koncar V.,GEMTEX
Mechanical Systems and Signal Processing

This paper deals with the visual servoing of X-Y robot systems using low cost CCD camera. The proposed approach is based on the theory of piecewise continuous systems which are a particular class of hybrid systems with autonomous switching and controlled impulses. Visual trajectory tracking systems comprising piecewise continuous controllers and observers, are developed. Real-time results are given to illustrate the effectiveness of the proposed visual control system. © 2012 Elsevier Ltd. Source

Ashraf M.,GEMTEX | Dumont F.,University of Valenciennes and HainautCambresis | Campagne C.,French National Graduate School of Textile Engineering | Champagne P.,University of Valenciennes and HainautCambresis | And 3 more authors.
Journal of Engineered Fibers and Fabrics

ZnO nanorods were grown on polyester fabric by hydrothermal process. The seeding of fabric to grow ZnO nanorods was necessary because they did not grow without seeding. An air plasma treatment was carried out on polyester fabric to generate polar groups which could attach ZnO seeds. ZnO nanorods were grown on these seeds. The generation of polar groups was confirmed by XPS analysis. The morphology of nanorods was characterized with SEM and TEM. The quantity of ZnO deposited on fabric in the form of nanorods was estimated to be 5.6% w/w by atomic absorption spectroscopy. Two Gram negative bacteria; Escherichia coli and Pseudomonas aeruginosa and a Gram positive; Staphyloccocus aureus were used for antibacterial activity evaluation by qualitative method. E. coli and S. aureus were used for quantitative assessment by using NF ISO 20743: 2009 Transfer Method. It was noted that the functionalized fabric prevented the growth of bacteria not only on and below the fabric but also in the immediate proximities for all three bacteria. It was also observed that the fabric was more effective against Gram positive as compared to Gram negative bacteria. Moreover, it was shown that UV pre-activation of functionalized fabric enhanced the antibacterial activity. Source

Kumar V.,GEMTEX | Kumar V.,Lille University of Science and Technology | Koehl L.,GEMTEX | Koehl L.,Lille University of Science and Technology | And 2 more authors.
Journal of Manufacturing Systems

Textile and clothing industry is one of the classical manufacturing industries which have recently undergone major transformations due to delocalization and high market volatility. In this context, one solution to guarantee the control and optimization of globalized supply chain is the implementation of a traceability system to follow-up the activities of different actors of the supply chain, improve brand value by countering pirate and enhance value creation in reverse supply chain. Therefore, in this paper, we first introduce the idea of fully integrated tracking tags for casting traceability in the textile. Then, as one stage of the traceability system development, we describe a yarn coding scheme to transform a textile structure into a tracking tag. Here, a number of special yarns were coded according to various combinations of optical characteristics. Further, a recognition system was developed for identifying the unique identification yarn code by using different image analysis techniques. © 2016 The Society of Manufacturing Engineers Source

Jelil R.A.,GEMTEX | Zeng X.,GEMTEX | Koehl L.,GEMTEX | Perwuelz A.,GEMTEX
Textile Research Journal

In this work, different woven fabrics with varying raw materials, fiber types and weave constructions were used for studying plasma treatment under different atmospheric conditions. Surface modification was characterized using wetting and capillarity surface analysis methods. Moreover, a fuzzy sensitivity variation criterion was used to select the most relevant parameters for woven fabrics from experimental data measured on the fabrics and during the plasma process. In fact, the results obtained using this learning data-based fuzzy sensitivity variation criterion could effectively validate those obtained from the physical and chemical knowledge on plasma treatment. According to the results, air permeability, fiber count, weave construction and summit density were identified as the most relevant parameters, in addition to electrical power, treatment speed and fiber nature. This finding indicated that these parameters had an influence on the plasma treatment results. © The Author(s) 2012 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. Source

Risicato J.-V.,GEMTEX | Legrand X.,GEMTEX | Soulat D.,GEMTEX | Koncars V.,GEMTEX
Journal of Industrial Textiles

A novel braiding–weaving system (BWS) is developed offering broad design and manufacturing possibilities based on hybridisation of weaving and braiding. In order to understand and optimize this machine and to be able to explore all the possibilities regarding complex 3-dimensional (3D) structures design, a new modelling strategy has been developed to generate geometrical skeleton of those structures. This strategy is based on the collision detection and kinematic aspects of the machine itself. Hypothesis given by kinematics allows to simply change the structure type (i.e. braiding or weaving) by changing the yarns paths. Those hypotheses are introduced in the article followed by the model that has been used and the collision detection method. Modelled 3D textile preforms are compared with manufactured samples in order to evaluate the accuracy of the modelling and simulation approaches. © The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. Source

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