{"id":9312,"date":"2020-09-29T07:52:18","date_gmt":"2020-09-29T05:52:18","guid":{"rendered":"https:\/\/ggba.swiss\/spin-off-de-lepfl-hydromea-rend-communication-marine-ultra-rapide\/"},"modified":"2023-07-04T13:43:27","modified_gmt":"2023-07-04T11:43:27","slug":"spin-off-de-lepfl-hydromea-rend-communication-marine-ultra-rapide","status":"publish","type":"post","link":"https:\/\/ggba.swiss\/fr\/spin-off-de-lepfl-hydromea-rend-communication-marine-ultra-rapide\/","title":{"rendered":"La spin-off de l’EPFL Hydromea rend la communication sous-marine ultra-rapide"},"content":{"rendered":"
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Hydromea a d\u00e9velopp\u00e9 un modem optique miniature qui peut fonctionner jusqu’\u00e0 6\u2019000 m\u00e8tres sous la surface de l’oc\u00e9an. Il est suffisamment sensible pour collecter des donn\u00e9es \u00e0 tr\u00e8s grande vitesse \u00e0 partir de sources situ\u00e9es \u00e0 plus de 50 m\u00e8tres.<\/h4>\n<\/div>\n
<\/figure>\n

Utiliser un appareil connect\u00e9 sous l’eau n’est pas chose ais\u00e9e. Les ondes radio ne fonctionnent pas bien : elles sont facilement absorb\u00e9es par l’eau, ce qui signifie qu’elles ne peuvent pas aller plus loin qu’un m\u00e8tre. De nombreux capteurs n’offrent qu’une connexion filaire, mais ils sont peu pratiques car il faut retirer les appareils de l’eau pour r\u00e9cup\u00e9rer leurs donn\u00e9es. La communication acoustique est souvent utilis\u00e9e, mais elle est tr\u00e8s lente et peu fiable. Ce sont l\u00e0 des obstacles importants \u00e0 l’efficacit\u00e9 des communications lorsqu’il s’agit de construction, d’inspection, de surveillance et de r\u00e9paration sous-marines – comme dans le secteur de l’\u00e9nergie offshore.<\/p>\n<\/div>\n

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Les ing\u00e9nieurs d’Hydromea<\/a>, une spin-off de l’EPFL<\/a>, y ont trouv\u00e9 une solution : utiliser la lumi\u00e8re pour transmettre des donn\u00e9es sous la surface des oc\u00e9ans ou des lacs. Ils ont mis au point un modem sous-marin appel\u00e9 LUMA qui communique par le biais d’une lumi\u00e8re bleue clignotant rapidement. Le modem convertit les donn\u00e9es en impulsions lumineuses qu’il envoie, ou inversement, convertit les impulsions lumineuses qu’il re\u00e7oit en donn\u00e9es.<\/p>\n

Collecte instantan\u00e9e de donn\u00e9es pour les limnologues<\/h4>\n

Enti\u00e8rement contenu dans un bo\u00eetier en plastique, LUMA est con\u00e7u pour fonctionner \u00e0 des profondeurs allant jusqu’\u00e0 6\u2019000 m\u00e8tres. Le syst\u00e8me a d\u00e9j\u00e0 \u00e9t\u00e9 test\u00e9 dans l’oc\u00e9an Pacifique, \u00e0 4\u2019280 m\u00e8tres de profondeur. Hydromea contribue \u00e9galement au d\u00e9veloppement de syst\u00e8mes de robotique et de communication pour L\u00e9XPLORE<\/a>, une plateforme de recherche situ\u00e9e au bord du lac L\u00e9man, pr\u00e8s de Pully dans le\u00a0canton de Vaud.<\/p>\n<\/div>\n

Les limnologues y utilisent LUMA pour v\u00e9rifier r\u00e9guli\u00e8rement les donn\u00e9es recueillies sous l’eau et s’assurer du bon fonctionnement des instruments de mesure, car les capteurs doivent rester sous l’eau pendant des mois. Un modem est install\u00e9 sur l’enregistreur de donn\u00e9es qui collecte les donn\u00e9es scientifiques des capteurs immerg\u00e9s et l’autre modem est install\u00e9 sur un robot sous-marin qui plonge jusqu’\u00e0 l’endroit o\u00f9 se trouvent les capteurs et collecte les donn\u00e9es des capteurs instantan\u00e9ment.<\/div>\n","protected":false},"excerpt":{"rendered":"

Hydromea a d\u00e9velopp\u00e9 un modem optique miniature qui peut fonctionner jusqu’\u00e0 6\u2019000 m\u00e8tres sous la surface de l’oc\u00e9an. Il est suffisamment sensible pour collecter des donn\u00e9es \u00e0 tr\u00e8s grande vitesse \u00e0 partir de sources situ\u00e9es \u00e0 plus de 50 m\u00e8tres. Utiliser un appareil connect\u00e9 sous l’eau n’est pas chose ais\u00e9e. Les ondes radio ne fonctionnent […]<\/p>\n","protected":false},"author":3,"featured_media":9313,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"mc4wp_mailchimp_campaign":[],"footnotes":""},"categories":[845],"tags":[1072],"class_list":["post-9312","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","tag-rd-fr"],"acf":[],"yoast_head":"\nLa spin-off de l'EPFL Hydromea rend la communication sous-marine ultra-rapide - Greater Geneva Bern area<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ggba.swiss\/fr\/spin-off-de-lepfl-hydromea-rend-communication-marine-ultra-rapide\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La spin-off de l'EPFL Hydromea rend la communication sous-marine ultra-rapide - Greater Geneva Bern area\" \/>\n<meta property=\"og:description\" content=\"Hydromea a d\u00e9velopp\u00e9 un modem optique miniature qui peut fonctionner jusqu’\u00e0 6\u2019000 m\u00e8tres sous la surface de l’oc\u00e9an. Il est suffisamment sensible pour collecter des donn\u00e9es \u00e0 tr\u00e8s grande vitesse \u00e0 partir de sources situ\u00e9es \u00e0 plus de 50 m\u00e8tres. Utiliser un appareil connect\u00e9 sous l’eau n’est pas chose ais\u00e9e. 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