{"id":2188,"date":"2012-09-14T16:59:16","date_gmt":"2012-09-14T16:59:16","guid":{"rendered":"http:\/\/blogs.funiber.org\/pt\/?p=2188"},"modified":"2012-09-14T16:59:16","modified_gmt":"2012-09-14T16:59:16","slug":"dispositivo-permite-detectar-movimentos-utilizando-o-wifi","status":"publish","type":"post","link":"https:\/\/www.funiber.blog\/pt\/tecnologias-tic\/2012\/09\/14\/dispositivo-permite-detectar-movimentos-utilizando-o-wifi","title":{"rendered":"Dispositivo permite detectar movimentos utilizando o WiFi"},"content":{"rendered":"<p>Dois cientistas da Escola Universit\u00e1ria de Londres, desenvolveram um dispositivo que permite identificar as varia\u00e7\u00f5es atrav\u00e9s de um sinal de WiFi e, dessa forma, obter leituras similares \u00e0s de um radar. O aparelho criado por Karl Woodbridge e Kevin Chetty, pode detectar as mudan\u00e7as geradas pelos objetos em movimento atrav\u00e9s das ondas de r\u00e1dio do WiFi. Utilizando o efeito Doppler, \u00e9 poss\u00edvel usar o sinal de qualquer roteador para identificar movimentos, inclusive atr\u00e1s de muros de 30 cent\u00edmetros de espessura.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <!--more--><\/p>\n<p>O aparelho \u00e9 um receptor passivo de ondas de r\u00e1dio na freq\u00fc\u00eancia de 2.4GHz e possui duas antenas, uma recebe o sinal e a outra detecta as mudan\u00e7as nas ondas do r\u00e1dio. Utilizando este aparelho, \u00e9 poss\u00edvel detectar a dire\u00e7\u00e3o, o movimento e a velocidade das pessoas no interior de uma casa com um roteador WiFi.<\/p>\n<p>O aparelho s\u00f3 recebe os sinais, portanto, n\u00e3o pode ser detectado. As utilidades que poderiam ser dadas a esse dispositivo est\u00e3o sendo analisadas, inclusive, para aplica\u00e7\u00f5es militares e opera\u00e7\u00f5es policiais.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dois cientistas da Escola Universit\u00e1ria de Londres, desenvolveram um dispositivo que permite identificar as varia\u00e7\u00f5es atrav\u00e9s de um sinal de WiFi e, dessa forma, obter leituras similares \u00e0s de um radar. O aparelho criado por Karl Woodbridge e Kevin Chetty, pode detectar as mudan\u00e7as geradas pelos objetos em movimento atrav\u00e9s das ondas de r\u00e1dio do [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_newsletter_tier_id":0,"footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[6],"tags":[],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dispositivo permite detectar movimentos utilizando o WiFi - FuniBlogs - FUNIBER<\/title>\n<meta name=\"robots\" content=\"noindex, nofollow\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dispositivo permite detectar movimentos utilizando o WiFi - FuniBlogs - FUNIBER\" \/>\n<meta property=\"og:description\" content=\"Dois cientistas da Escola Universit\u00e1ria de Londres, desenvolveram um dispositivo que permite identificar as varia\u00e7\u00f5es atrav\u00e9s de um sinal de WiFi e, dessa forma, obter leituras similares \u00e0s de um radar. 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