{"id":4784,"date":"2025-06-03T09:28:41","date_gmt":"2025-06-03T09:28:41","guid":{"rendered":"http:\/\/br.object-c.cn\/?p=4784"},"modified":"2025-06-24T18:24:47","modified_gmt":"2025-06-24T10:24:47","slug":"concecao-de-sistemas-de-captacao-de-energia-para-dispositivos-iot-autoalimentados","status":"publish","type":"post","link":"https:\/\/www.brilhoelectroparts.com\/pt\/energy-harvesting-system-design-for-self-powered-iot-devices\/","title":{"rendered":"Conce\u00e7\u00e3o de sistemas de capta\u00e7\u00e3o de energia para dispositivos IoT autoalimentados"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>Introdu\u00e7\u00e3o<\/strong><\/h2><p>O mercado da IoT atingir\u00e1&nbsp;<strong>30 mil milh\u00f5es de dispositivos conectados at\u00e9 2027<\/strong>&nbsp;(Gartner), com o 43% a utilizar a capta\u00e7\u00e3o de energia para eliminar as pilhas (dados da IDTechEx de 2024). Os principais desafios incluem:<\/p><ul class=\"wp-block-list\"><li><strong>Disponibilidade intermitente de energia<\/strong>\u00a0(intervalo de 10 a 1000 \u03bcW)<\/li>\n\n<li><strong>Limita\u00e7\u00f5es de armazenamento<\/strong>\u00a0(Compromissos entre supercondensadores e baterias de pel\u00edcula fina)<\/li>\n\n<li><strong>Requisitos para o arranque a frio<\/strong>\u00a0(pot\u00eancia de arranque &lt;20 \u03bcW)<\/li><\/ul><p>O laborat\u00f3rio de capta\u00e7\u00e3o de energia da Briltech validou estas arquiteturas em mais de 120 instala\u00e7\u00f5es reais.<\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\"><strong>Sec\u00e7\u00e3o 1: Otimiza\u00e7\u00e3o da fonte de colheita<\/strong><\/h2><h3 class=\"wp-block-heading\"><strong>1.1 Compara\u00e7\u00e3o de fontes e densidade de pot\u00eancia<\/strong><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Fonte de energia<\/th><th>Resultado t\u00edpico<\/th><th>Melhor caso de utiliza\u00e7\u00e3o<\/th><\/tr><\/thead><tbody><tr><td>Energias solares para interiores<\/td><td>10-100 \u03bcW\/cm\u00b2<\/td><td>Sensores inteligentes<\/td><\/tr><tr><td>Vibra\u00e7\u00e3o<\/td><td>50-300 \u03bcW\/g\u00b2<\/td><td>IoT industrial<\/td><\/tr><tr><td>T\u00e9rmico<\/td><td>20 \u03bcW\/\u00b0C\/cm\u00b2<\/td><td>Sistemas de climatiza\u00e7\u00e3o<\/td><\/tr><tr><td>RF<\/td><td>1-10 \u03bcW\/m\u00b2<\/td><td>Rastreamento de ativos<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Estudo de caso:<\/strong>&nbsp;O nosso coletor h\u00edbrido solar-t\u00e9rmico para term\u00f3statos inteligentes:<\/p><ul class=\"wp-block-list\"><li><strong>Sustenta uma pot\u00eancia m\u00e9dia de 250 \u03bcW<\/strong>\u00a0em ambientes de escrit\u00f3rio<\/li>\n\n<li><strong>Recarga em 3 segundos<\/strong>\u00a0a partir da descarga total<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>1.2 Rastreio do ponto de pot\u00eancia m\u00e1xima (MPPT)<\/strong><\/h3><pre class=\"wp-block-preformatted\">void mppt_algorithm() {  \n  if (dV\/dI &gt; 0) { \n increase_duty_cycle();  \n  } else { \n decrease_duty_cycle();  \n  }  \n}  <\/pre><p>*Aumenta a efici\u00eancia em 18-271 TP3T em compara\u00e7\u00e3o com o carregamento direto*<\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\"><strong>Sec\u00e7\u00e3o 2: Conce\u00e7\u00e3o de sistemas de consumo energ\u00e9tico ultrabaixo<\/strong><\/h2><h3 class=\"wp-block-heading\"><strong>2.1 Sele\u00e7\u00e3o de circuitos integrados de gest\u00e3o de energia<\/strong><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>IC<\/th><th>Corrente de repouso<\/th><th>Arranque a frio<\/th><th>Efici\u00eancia<\/th><\/tr><\/thead><tbody><tr><td>BQ25570<\/td><td>330 nA<\/td><td>20 \u03bcW<\/td><td>85%<\/td><\/tr><tr><td>LTC3108<\/td><td>450 nA<\/td><td>15 \u03bcW<\/td><td>78%<\/td><\/tr><tr><td>SPV1050<\/td><td>1,2 \u03bcA<\/td><td>5 \u03bcW<\/td><td>92%<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Configura\u00e7\u00e3o recomendada pela Briltech:<\/strong><\/p><ul class=\"wp-block-list\"><li><strong>Recolhedor de dupla entrada<\/strong>\u00a0(energia solar + vibra\u00e7\u00e3o)<\/li>\n\n<li><strong>Comparador de nanopot\u00eancia<\/strong>\u00a0para a comuta\u00e7\u00e3o de fontes<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>2.2 Compromissos no armazenamento de energia<\/strong><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tecnologia<\/th><th>Densidade energ\u00e9tica<\/th><th>Ciclo de vida<\/th><th>Fuga<\/th><\/tr><\/thead><tbody><tr><td>Supercapacitor<\/td><td>5 Wh\/L<\/td><td>500 mil<\/td><td>5%\/dia<\/td><\/tr><tr><td>Li-Pol\u00edmero<\/td><td>300 Wh\/L<\/td><td>1 mil<\/td><td>11 horas e 30 minutos por m\u00eas<\/td><\/tr><tr><td>Camada fina<\/td><td>50 Wh\/L<\/td><td>10 km<\/td><td>31 horas por m\u00eas<\/td><\/tr><\/tbody><\/table><\/figure><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\"><strong>Sec\u00e7\u00e3o 3: Estrat\u00e9gias para um funcionamento fi\u00e1vel<\/strong><\/h2><h3 class=\"wp-block-heading\"><strong>3.1 Ciclo de trabalho adaptativo<\/strong><\/h3><p><strong>Exemplo de n\u00f3 de sensor sem fios:<\/strong><\/p><ol start=\"1\" class=\"wp-block-list\"><li><strong>Fase de colheita:<\/strong>\u00a010 ms a 1 mA<\/li>\n\n<li><strong>Processamento:<\/strong>\u00a05 ms a 5 mA<\/li>\n\n<li><strong>Transmitir:<\/strong>\u00a02 ms a 20 mA<\/li>\n\n<li><strong>Sono:<\/strong>\u00a023,983 s a 1 \u03bcA<\/li><\/ol><h3 class=\"wp-block-heading\"><strong>3.2 Resist\u00eancia ambiental<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>Funcionamento entre -40 \u00b0C e +85 \u00b0C<\/strong>\u00a0(Testado de acordo com a norma MIL-STD-810G)<\/li>\n\n<li><strong>Veda\u00e7\u00e3o IP67<\/strong>\u00a0para instala\u00e7\u00f5es no exterior<\/li>\n\n<li><strong>C\u00e9lulas solares resistentes aos raios UV<\/strong>\u00a0(20 anos de vida \u00fatil)<\/li><\/ul>","protected":false},"excerpt":{"rendered":"<p>Introduction The IoT market will reach&nbsp;30 billion connected devices by 2027&nbsp;(Gartner), with 43% deploying energy harvesting to eliminate batteries (2024<\/p>","protected":false},"author":1,"featured_media":4795,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4784","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-success-case"],"_links":{"self":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/posts\/4784","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/comments?post=4784"}],"version-history":[{"count":0,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/posts\/4784\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/media\/4795"}],"wp:attachment":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/media?parent=4784"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/categories?post=4784"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/tags?post=4784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}