{"id":80466,"date":"2024-01-14T13:05:41","date_gmt":"2024-01-14T13:05:41","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/voltimetro-digital-dvm-descricao-e-caracteristicas\/"},"modified":"2024-01-20T09:48:37","modified_gmt":"2024-01-20T09:48:37","slug":"voltimetro-digital-dvm-descricao-e-caracteristicas","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/pt-br\/voltimetro-digital-dvm-descricao-e-caracteristicas\/","title":{"rendered":"Volt\u00edmetro Digital &#8211; DVM | Descri\u00e7\u00e3o e caracter\u00edsticas |"},"content":{"rendered":"<h2>Medi\u00e7\u00e3o de Tens\u00e3o na Era Digital: O Volt\u00edmetro Digital &#8211; DVM<\/h2>\n<p>O volt\u00edmetro digital (DVM) \u00e9 uma ferramenta essencial na eletr\u00f4nica moderna, oferecendo uma medi\u00e7\u00e3o precisa de tens\u00f5es AC e DC. Seu uso \u00e9 predominante sobre os volt\u00edmetros anal\u00f3gicos devido \u00e0 sua capacidade de exibir valores num\u00e9ricos discretos ao inv\u00e9s da deflex\u00e3o de um ponteiro.<\/p>\n<h2>Funcionamento e Tipos de Volt\u00edmetros<\/h2>\n<p>Os DVMs s\u00e3o geralmente constru\u00eddos em torno de um conversor anal\u00f3gico-digital espec\u00edfico, conhecido como conversor integrador. Este tipo de conversor transforma uma tens\u00e3o desconhecida em uma representa\u00e7\u00e3o digital atrav\u00e9s de um integrador. No modelo b\u00e1sico, conhecido como conversor de dupla inclina\u00e7\u00e3o, a tens\u00e3o desconhecida \u00e9 aplicada ao integrador, permitindo uma rampa durante um per\u00edodo fixo (per\u00edodo de subida). Em seguida, uma tens\u00e3o de refer\u00eancia conhecida de polaridade oposta \u00e9 aplicada, permitindo uma rampa at\u00e9 que a sa\u00edda do integrador retorne a zero (per\u00edodo de descida). A tens\u00e3o de entrada \u00e9 calculada com base na tens\u00e3o de refer\u00eancia, no tempo constante de subida e no per\u00edodo de descida medido.<\/p>\n<p>Al\u00e9m do DVM, existem outros tipos de volt\u00edmetros, como:<\/p>\n<ul>\n<li>Volt\u00edmetro de Bobina M\u00f3vel com \u00cdm\u00e3 Permanente (PMMCM)<\/li>\n<li>Volt\u00edmetro de Ferro M\u00f3vel<\/li>\n<li>Electrodinam\u00f4metro<\/li>\n<li>Volt\u00edmetro de Tipo Retificador<\/li>\n<li>Volt\u00edmetro de Tipo Indu\u00e7\u00e3o<\/li>\n<li>Volt\u00edmetro de Tipo Eletrost\u00e1tico<\/li>\n<\/ul>\n<h2>Simbologia e Analogia Hidr\u00e1ulica do Volt\u00edmetro<\/h2>\n<p>Em diagramas de circuito, um volt\u00edmetro \u00e9 representado pela letra V dentro de um c\u00edrculo, com duas linhas emergindo para representar os dois pontos de medi\u00e7\u00e3o. A analogia hidr\u00e1ulica, ou a analogia el\u00e9trico-fluido, \u00e9 uma ferramenta \u00fatil para ensinar e entender como os circuitos funcionam. Nesta analogia, a corrente el\u00e9trica \u00e9 invis\u00edvel e os componentes eletr\u00f4nicos s\u00e3o representados por equivalentes hidr\u00e1ulicos. A rela\u00e7\u00e3o entre tens\u00e3o e corrente \u00e9 definida pela Lei de Ohm, an\u00e1loga \u00e0 equa\u00e7\u00e3o de Hagen\u2013Poiseuille, relacionando fluxo e potencial nos respectivos sistemas. A tens\u00e3o \u00e9 compar\u00e1vel \u00e0 diferen\u00e7a de press\u00e3o que impulsiona a \u00e1gua atrav\u00e9s de uma mangueira, medida em volts (V).<\/p>\n<p>Assim, o volt\u00edmetro \u00e9 equivalente \u00e0 medi\u00e7\u00e3o de diferen\u00e7a de press\u00e3o em um sistema hidr\u00e1ulico, uma compara\u00e7\u00e3o valiosa para quem procura compreender os fundamentos da eletricidade.<\/p>\n<h2>Conclus\u00e3o<\/h2>\n<p>O volt\u00edmetro digital \u00e9 uma ferramenta fundamental na medi\u00e7\u00e3o de tens\u00e3o, oferecendo precis\u00e3o, facilidade de leitura e versatilidade superior aos modelos anal\u00f3gicos. Seu design baseado no conversor integrador garante uma alta resolu\u00e7\u00e3o e exatid\u00e3o, tornando-o indispens\u00e1vel em diversos campos da eletr\u00f4nica e engenharia el\u00e9trica.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/07\/digital-voltmeter-DVM-description.png\" alt=\"\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/voltmeter\/digital-voltmeter-dvm\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Volt\u00edmetros digitais s\u00e3o volt\u00edmetros que exibem valores de tens\u00e3o CA e CC e usam n\u00fameros discretos em vez de deflex\u00e3o do ponteiro; eles s\u00e3o preferidos aos volt\u00edmetros anal\u00f3gicos.<\/p>\n","protected":false},"author":1,"featured_media":3024,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-80466","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nao-categorizado","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Volt\u00edmetro Digital - DVM | Descri\u00e7\u00e3o e caracter\u00edsticas |<\/title>\n<meta name=\"description\" content=\"Volt\u00edmetros digitais s\u00e3o volt\u00edmetros que exibem valores de tens\u00e3o CA e CC e usam n\u00fameros discretos em vez de deflex\u00e3o do ponteiro; 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