{"id":20950,"date":"2022-11-14T10:35:55","date_gmt":"2022-11-14T10:35:55","guid":{"rendered":"https:\/\/vr-room.ch\/?p=20950"},"modified":"2022-11-08T10:42:19","modified_gmt":"2022-11-08T10:42:19","slug":"vr-handschuh-aus-dem-3d-drucker","status":"publish","type":"post","link":"https:\/\/vr-room.ch\/fr\/2022\/11\/14\/vr-handschuh-aus-dem-3d-drucker\/","title":{"rendered":"Gant VR imprim\u00e9 en 3D"},"content":{"rendered":"<h3 id=\"gemeinsam-mit-experten-der-epfl-und-der-eth-zuerich-forscht-ein-team-der-empa-an-der-naechsten-generation-eines-vr-handschuhs-mit-dem-virtuelle-welten-im-metaverse-greifbar-werden-der-handschuh-soll\">En collaboration avec des experts de l'EPFL et de l'ETH Zurich, une \u00e9quipe de l'Empa effectue des recherches sur la prochaine g\u00e9n\u00e9ration de gants VR, avec lesquels les mondes virtuels deviennent tangibles dans le m\u00e9tavers. Le gant doit \u00eatre taill\u00e9 sur mesure pour l'utilisateur et pouvoir \u00eatre produit en grande partie automatiquement - par un proc\u00e9d\u00e9 d'impression 3D.<\/h3>\n<div class=\"std-paragraph-block\">\n<div class=\"std-art-paragraph\">\n<p>Dorina Opris, directrice du groupe de recherche Functional Polymeric Materials et Patrick Danner, chercheur \u00e0 l'Empa, font partie, avec leurs recherches sur les polym\u00e8res \u00e9lectroactifs, d'un grand projet appel\u00e9 <a href=\"http:\/\/www.sfa-am.ch\/manufhaptics.html\" target=\"_blank\" rel=\"noopener\">&#8222;Manufhaptics&#8220;<\/a>. L'objectif de ce projet de quatre ans, dirig\u00e9 par Herbert Shea du Soft Transducers Lab de l'EPFL, est de cr\u00e9er un gant qui rende les mondes virtuels tangibles. Point crucial : tous les composants du gant, qui exercent diff\u00e9rentes forces sur la surface de la main, doivent pouvoir \u00eatre fabriqu\u00e9s par impression 3D. Il s'agit donc ici d'explorer de nouveaux mat\u00e9riaux dont la m\u00e9thode de production est pens\u00e9e d\u00e8s le d\u00e9part.<\/p>\n<\/div>\n<\/div>\n<div class=\"std-paragraph-block\">\n<h3 id=\"drei-typen-von-aktuatoren\">Trois types d'actionneurs<\/h3>\n<div class=\"std-art-paragraph\">\n<div>\n<div class=\"std-art-embedded-image\">\n<div class=\"std-art-img-row\">\n<div class=\"std-art-img-cell\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/www.empa.ch\/documents\/56164\/22405047\/EQ77-Handschuh-Paste-435.jpg\/a09cc82d-dd07-469a-8cd2-5715b6268563?t=1663687529973\" alt=\"\/documents\/56164\/22405047\/EQ77-Handschuh-Paste-435.jpg\/a09cc82d-dd07-469a-8cd2-5715b6268563?t=1663687529973\" width=\"637\" height=\"350\" \/><\/div>\n<\/div>\n<div class=\"std-art-img-caption-embedded\"><\/div>\n<\/div>\n<\/div>\n<p>Pour que les surfaces virtuelles soient r\u00e9elles au toucher et que les objets soient tangibles \u00e0 la bonne taille, les \u00e9quipes de recherche de l'EPFL, de l'ETH Zurich et de l'Empa veulent int\u00e9grer trois types d'actionneurs diff\u00e9rents dans le gant : Sur la face inf\u00e9rieure des doigts, des picots peuvent se d\u00e9velopper et reproduire une certaine texture de surface. Des freins \u00e9lectrostatiques sont mont\u00e9s au niveau des articulations des doigts, ce qui rigidifie le gant et bloque les articulations. Cela simule des objets plus grands et solides qui offrent une r\u00e9sistance lorsqu'on les touche. Le troisi\u00e8me type d'actionneurs qui compl\u00e8tent l'exp\u00e9rience virtuelle s'appelle DEA, abr\u00e9viation de Dielectric elastic actuators. Ces DEA sont plac\u00e9s sur le dos de la main ; ils resserrent la peau ext\u00e9rieure du gant de mani\u00e8re \u00e0 ce qu'il soit parfaitement ajust\u00e9 \u00e0 tous les endroits. Pendant l'exp\u00e9rience VR, ils peuvent en outre exercer une pression sur la surface de la main. Les DEA sont le projet partiel de l'Empa.<\/p>\n<\/div>\n<\/div>\n<div class=\"std-paragraph-block\">\n<h3 id=\"kuenstliche-muskeln-aus-dem-3d-drucker\">K\u00fcnstliche &#8222;Muskeln&#8220; aus dem 3D-Drucker<\/h3>\n<div class=\"std-art-paragraph\">\n<div>\n<div class=\"std-art-embedded-image\">\n<div class=\"std-art-img-row\">\n<div class=\"std-art-img-cell\"><img decoding=\"async\" src=\"https:\/\/www.empa.ch\/documents\/56164\/22405047\/EQ77-Handschuh-Grafik-870.jpg\/bd669933-1e4e-4856-bdae-9c5b858ce641?t=1663687529637\" alt=\"\/documents\/56164\/22405047\/EQ77-Handschuh-Grafik-870.jpg\/bd669933-1e4e-4856-bdae-9c5b858ce641?t=1663687529637\" \/><\/div>\n<\/div>\n<div class=\"std-art-img-caption-embedded\"><em>Des actionneurs \u00e9lectrostatiques de la taille d'un millim\u00e8tre, renforc\u00e9s hydrauliquement, procurent une sensation de toucher et de texture (\u00e0 gauche). Actionneurs d'accouplement \u00e9lectrostatiques de grande force, capables de bloquer les articulations des doigts pour donner une sensation de fermet\u00e9 aux objets virtuels (au centre). Actuateur \u00e9lastom\u00e8re di\u00e9lectrique multicouche pour un ajustement actif de la taille du gant et une compression locale (\u00e0 droite). Illustration : Herbert Shea, EPFL (2021)<\/em><\/div>\n<\/div>\n<\/div>\n<p>Dorina Opris, la directrice du groupe de recherche, a accumul\u00e9 des ann\u00e9es d'exp\u00e9rience avec de tels polym\u00e8res \u00e9lectroactifs. \"Ces polym\u00e8res \u00e9lastiques r\u00e9agissent aux champs \u00e9lectriques et se contractent comme un muscle\", explique la chercheuse. \"Mais ils peuvent aussi servir de capteur, absorber une force ext\u00e9rieure et g\u00e9n\u00e9rer une impulsion \u00e9lectrique \u00e0 partir de celle-ci. Nous envisageons \u00e9galement de les utiliser pour produire de l'\u00e9nergie localement : Le mouvement peut ainsi g\u00e9n\u00e9rer de l'\u00e9lectricit\u00e9 partout\".<\/p>\n<p>Le projet Manufhaptics pose de nouveaux d\u00e9fis \u00e0 la chercheuse et \u00e0 son coll\u00e8gue Patrick Danner. \"Jusqu'\u00e0 pr\u00e9sent, nous avons fabriqu\u00e9 nos polym\u00e8res \u00e0 l'aide de solvants par le biais d'une synth\u00e8se chimique\", explique Opris. D\u00e9sormais, tout doit fonctionner sans solvant : Il est pr\u00e9vu de superposer jusqu'\u00e0 1000 fines couches issues de l'imprimante 3D, en alternant toujours le polym\u00e8re \u00e9lectroactif et une couche conductrice de courant.<\/p>\n<p>\"Il faut \u00e9viter les solvants dans une telle m\u00e9thode de production\", explique Opris. Et Patrick Danner d'expliquer la difficult\u00e9 suivante : les deux diff\u00e9rentes encres n\u00e9cessaires doivent avoir la consistance exacte pour s'\u00e9couler de la buse de l'imprimante 3D. \"Notre partenaire de projet Jan Vermant de l'ETH Zurich souhaite quelque chose avec des propri\u00e9t\u00e9s similaires \u00e0 celles d'une cr\u00e8me pour les mains. Elle doit sortir facilement de l'imprimante, puis rester ind\u00e9formable sur son support\". Et ensuite, cette structure de couche cr\u00e9meuse doit encore se r\u00e9ticuler pour former le polym\u00e8re ad\u00e9quat.<\/p>\n<p>Apr\u00e8s une longue s\u00e9rie d'essais, Danner a trouv\u00e9 une formulation prometteuse - une cr\u00e8me \u00e0 la fois suffisamment liquide et ind\u00e9formable, \u00e0 partir de laquelle des polym\u00e8res \u00e9lectroactifs peuvent \u00eatre cr\u00e9\u00e9s en une seule \u00e9tape. Son coll\u00e8gue Tazio Pleji de l'EPF de Zurich, un collaborateur de l'\u00e9quipe de recherche de Jan Vermant, a r\u00e9ussi \u00e0 transformer le mat\u00e9riau en plusieurs couches dans son imprimante 3D - toujours en alternant polym\u00e8re et mat\u00e9riau d'\u00e9lectrode. Il n'y a pas encore 1000 couches, mais seulement une dizaine, et le muscle artificiel issu de l'imprimante 3D ne fonctionne pas encore de mani\u00e8re satisfaisante.<\/p>\n<\/div>\n<\/div>\n<div class=\"std-paragraph-block\">\n<h3 id=\"die-konkurrenz-sitzt-in-harvard\">La concurrence est \u00e0 Harvard<\/h3>\n<div class=\"std-art-paragraph\">\n<p>Mais Opris et Danner sont confiants de r\u00e9ussir cette t\u00e2che en collaboration avec les sp\u00e9cialistes de l'impression de l'ETH Zurich - peut-\u00eatre la premi\u00e8re \u00e9quipe de chercheurs au monde. Les seuls concurrents scientifiques dans ce domaine si\u00e8gent \u00e0 l'universit\u00e9 de Harvard dans le Massachusetts.<\/p>\n<p>Source : Empa<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"En collaboration avec des experts de l'EPFL et de l'ETH Zurich, une \u00e9quipe de l'Empa m\u00e8ne des recherches sur la prochaine g\u00e9n\u00e9ration...","protected":false},"author":12,"featured_media":20953,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[],"class_list":{"0":"post-20950","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-virtual-reality-schweiz","8":"cs-entry","9":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>VR Handschuh aus dem 3D-Drucker - Schweizer Virtual Reality News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/vr-room.ch\/fr\/2022\/11\/14\/vr-handschuh-aus-dem-3d-drucker\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"VR Handschuh aus dem 3D-Drucker - 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