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JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) / Union internationale des sociétés de techniciens et chimistes des industries du cuir . Vol. 107, N° 5Mention de date : 09-10/2023Paru le : 17/10/2023 |
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Ajouter le résultat dans votre panierResearch on experimental exploration and identification positioning algorithm for the optimal stretching point of leather in the toggling process / Huan Yuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 5 (09-10/2023)
[article]
Titre : Research on experimental exploration and identification positioning algorithm for the optimal stretching point of leather in the toggling process Type de document : texte imprimé Auteurs : Huan Yuan, Auteur ; Ren Gonchang, Auteur ; Su Xiangyu, Auteur ; Jin Guang, Auteur ; Yang Yiming, Auteur ; Zhang Heng, Auteur Année de publication : 2023 Article en page(s) : p. 175-182 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algorithmes
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de moutons
Etirement (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The objective of this research is to address the issue of automated selection of the optimal stretching position for leather during the leather toggling process. By analysing a substantial number of leather profiles and the actions involved in manual stretching and leather stretching, it has been determined that selecting appropriate stretching positions and intervals is the pivotal factor in enhancing leather yield. Through orthogonal experimentation, it has been deduced that the ideal distances between the stretching points on both sides of the head and tail, as well as on both sides of the body parallel to the midrib line, are 12cm and 9cm respectively. Building upon this, the study proposes an algorithm for identifying and locating the most suitable stretching positions based on the simplified skeleton method and the intersection method of drawn circles. The algorithm employs machine vision to obtain the initial image of the leather source, followed by preprocessing to eliminate image defects and accentuated contours. Subsequently, the thinning algorithm extracts the image skeleton, and the convolution operation filters out the ridges and limbs of the leather, resulting in the simplest skeleton that determines the requisite stretching points. Building upon the determination of the necessary stretching points, the remaining contour regions of the leather are established using the circle intersection method, thus obtaining the remaining stretching points. The identified algorithm for identifying the optimal stretching points in this study holds significant importance in the research and development of automated equipment for the leather stretching plate drying process, and serves as a valuable reference for enhancing leather yield and optimising the process. Note de contenu : - The method and principle of selecting stretching points
- Exploration experiment of optimal stretching points
- Design of the optimal stretch point identification algorithm : Image preprocessing - Selection of indispensable stretching points - Selection of other stretching ponts - ALgorithm verification and result analysis
- Table 1 : Table of horizontal parameters of various factors
- Table 2 : Orthogonal experiment scheme and result record table
- Table 3 : Range analysis of the experimental resultsEn ligne : https://drive.google.com/file/d/1rir9LlaHepJ3AlnIpukUQ58D3AOk_wiA/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39956
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 5 (09-10/2023) . - p. 175-182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24238 - Périodique Bibliothèque principale Documentaires Disponible Correlation analysis and microscopic simulation of temperature, time and moisture permeability of natural sheepskin and regenerated leather / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 5 (09-10/2023)
[article]
Titre : Correlation analysis and microscopic simulation of temperature, time and moisture permeability of natural sheepskin and regenerated leather Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Chen Xiaoting, Auteur ; Huang Zhuo, Auteur ; Fang Songchun, Auteur ; Guo Yizi, Auteur Année de publication : 2023 Article en page(s) : p. 183-185 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir reconstitué
Cuirs et peaux -- Effets de l'humidité
Cuirs et peaux -- Effets de la température
Cuirs et peaux de moutons
PerméabilitéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the comprehensive effects of environmental temperature and time on the moisture permeability of natural sheepskin and regenerated leather were compared and analysed by using MATLAB fitting and least square method and their regression equations were constructed respectively.
The microstructure comparison shows that both natural and recycled leathers are composed of protein fibres, which have many hydrophilic groups in their chains, therefore both have good moisture permeability which varies significantly with temperature. The moisture permeability of regenerated leather is slightly weaker than that of natural sheepskin leather. The reason is that latex molecules fill between the collagen fibres, which reduces the gaps through which water vapour can pass, while the papillary layer of natural sheepskin has a tight structure and has a wicking effect that regenerated leather does not.Note de contenu : - Correlation analysis between temperature and time of the moisture permeability of natural sheepskin and regenerated leather
- MicrosimulationEn ligne : https://drive.google.com/file/d/1dECUNRpYQHcHuWQNxz85sR9fAtC5hvN5/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39957
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Code-barres Cote Support Localisation Section Disponibilité 24238 - Périodique Bibliothèque principale Documentaires Disponible Comparative analysis of moisture permeability of natural sheepskin and regenerated leather with temperature and time / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 5 (09-10/2023)
[article]
Titre : Comparative analysis of moisture permeability of natural sheepskin and regenerated leather with temperature and time Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Chen Xiaoting, Auteur ; Huang Zhuo, Auteur ; Fang Songchun, Auteur Année de publication : 2023 Article en page(s) : p. 186-188 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir reconstitué
Cuirs et peaux -- Analyse
Cuirs et peaux -- Effets de l'humidité
Cuirs et peaux de moutons
Microscopie électronique à balayageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper mainly compares and analyses the moisture permeability of natural sheepskin and regenerated leather with temperature and time. It was found that the effect of temperature on the moisture permeability of natural sheepskin and regenerated leather was significantly greater than that of time. The performance and trend of moisture permeability of recycled leather under both time and temperature are similar to that of sheepskin as a whole. At a low temperature below 50°C, the moisture permeability of recycled leather is comparable to that of natural sheepskin ; as the temperature rises, its moisture permeability gradually opens up the gap with that of sheepskin. By SEM characterisation, it was found that the fibrous tissues of the natural sheepskin papilla layer were tightly connected and the fibrous tissues of the reticulated layer were loose and disordered ; the recycled leather mainly consisted of crushed fibrous waste and adhesive, and the fibres were stuck with adhesive between them. Note de contenu : - EXPERIMENTAL PROCEDURES : Material preparation - Experimental equipment - Experimental procedure
- RESULTS AND DISCUSSION : Comparison of the effects of different times and temperatures on the moisture permeability of natural sheep leather and regenerated leather - SEM microscopic analysisEn ligne : https://drive.google.com/file/d/19_K5w4JRk7fENRhV_VkOeN0gSwHJCM8I/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39958
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Code-barres Cote Support Localisation Section Disponibilité 24238 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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24238 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |