{"id":9652,"date":"2025-11-24T16:13:17","date_gmt":"2025-11-24T15:13:17","guid":{"rendered":"https:\/\/websrv.saske.sk\/uef\/?p=9652"},"modified":"2025-11-24T16:16:04","modified_gmt":"2025-11-24T15:16:04","slug":"spliechajuce-ferokvapaliny-vyuzivaju-energiu-vibracii-prinasaju-novy-pohlad-na-napajanie-nositelnej-elektroniky-a-internetu-veci-zajtrajska","status":"publish","type":"post","link":"https:\/\/websrv.saske.sk\/uef\/spliechajuce-ferokvapaliny-vyuzivaju-energiu-vibracii-prinasaju-novy-pohlad-na-napajanie-nositelnej-elektroniky-a-internetu-veci-zajtrajska\/","title":{"rendered":"\u0160pliechaj\u00face ferokvapaliny vyu\u017e\u00edvaj\u00fa energiu vibr\u00e1ci\u00ed, prin\u00e1\u0161aj\u00fa nov\u00fd poh\u013ead na nap\u00e1janie nosite\u013enej elektroniky a internetu vec\u00ed zajtraj\u0161ka"},"content":{"rendered":"<p><strong>Modern\u00e9 zariadenia, od fitness trackerov a inteligentn\u00e9ho oble\u010denia a\u017e po senzory internetu vec\u00ed (IoT), vy\u017eaduj\u00fa kompaktn\u00e9 a udr\u017eate\u013en\u00e9 zdroje energie. V novom v\u00fdskume publikovanom v \u010dasopise Scientific Reports jeho autori predstavuj\u00fa zbera\u010d energie zalo\u017een\u00fd na horizont\u00e1lne umiestnenej f\u013ea\u0161ti\u010dke naplnenej do polovice biologicky odb\u00farate\u013enou ferokvapalinou. Ke\u010f sa ferokvapalina uvedie do kmitav\u00e9ho pohybu, \u0161pliecha vo vonkaj\u0161om magnetickom poli a v bl\u00edzkej cievke sa indukuje elektrick\u00e9 nap\u00e4tie. Systematickou zmenou konfigur\u00e1ci\u00ed magnetov a koncentr\u00e1ci\u00ed nano\u010dast\u00edc v\u00fdskumn\u00edci zmapovali, ako distributcia magnetick\u00e9ho po\u013ea a magnetiz\u00e1cia ferokvapaliny ovplyv\u0148uj\u00fa energetick\u00fd v\u00fdstup.<\/strong><\/p>\n<p><span style=\"font-weight: 400\">T\u00edm pod veden\u00edm <strong>RNDr. Michala Raj\u0148\u00e1ka, PhD.<\/strong> z \u00dastavu experiment\u00e1lnej fyziky SAV a Technickej univerzity v Ko\u0161iciach demon\u0161troval nov\u00fd pr\u00edstup k z\u00edskavaniu energie vibr\u00e1ci\u00ed pomocou ferokvapal\u00edn, kvapal\u00edn obsahuj\u00facich magnetick\u00e9 nano\u010dastice, ktor\u00e9 by mohli pom\u00f4c\u0165 nap\u00e1ja\u0165 nosite\u013en\u00fa elektroniku a distribuovan\u00e9 senzory.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Experimenty s pou\u017eit\u00edm piatich ferokvapal\u00edn s r\u00f4znymi magnetiz\u00e1ciami odhalili jasn\u00e9 trendy. Z\u00edskan\u00fd elektrick\u00fd v\u00fdkon sa v optim\u00e1lnej konfigur\u00e1cii line\u00e1rne zvy\u0161uje so satura\u010dnou magnetiz\u00e1ciou ferokvapaliny. Najefekt\u00edvnej\u0161ie nastavenie vyu\u017e\u00edva jeden permanentn\u00fd magnet pripevnen\u00fd k bo\u010dnej stene f\u013ea\u0161ti\u010dky, ktor\u00fd vytv\u00e1ra magnetick\u00e9 pole kolm\u00e9 na os oscil\u00e1cie aj na gravit\u00e1ciu. V tomto usporiadan\u00ed dosiahol najvy\u0161\u0161\u00ed nameran\u00fd v\u00fdkon pribli\u017ene <strong>232,6 nW<\/strong> pre najsilnej\u0161ie zmagnetizovan\u00fa kvapalinu. Je pozoruhodn\u00e9, \u017ee v silnej\u0161\u00edch magnetick\u00fdch poliach je pohyb ferokvapaliny brzden\u00fd magneto-visk\u00f3znym efektom, \u010d\u00edm sa zni\u017euje indukovan\u00e9 nap\u00e4tie, \u010do je pripomienka, \u017ee silnej\u0161ie polia nie v\u017edy generuj\u00fa viac energie.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Tento \u013eahk\u00fd a flexibiln\u00fd pr\u00edstup k z\u00edskavaniu energie pon\u00faka v\u00fdhody oproti tradi\u010dn\u00fdm elektromagnetick\u00fdm zbera\u010dom, ktor\u00e9 sa zvy\u010dajne spoliehaj\u00fa na \u0165a\u017ek\u00e9 pohybuj\u00face sa magnety. Ferokvapaliny pou\u017eit\u00e9 v tomto pr\u00edpade s\u00fa pripraven\u00e9 v biologicky odb\u00farate\u013enom transform\u00e1torovom oleji, \u010do zni\u017euje environment\u00e1lne riziko v pr\u00edpade \u00faniku. Okrem toho, preto\u017ee mechanizmus \u0161pliechania reaguje na mechanick\u00e9 stimuly z viacer\u00fdch smerov vzh\u013eadom na magnetick\u00e9 pole, je t\u00e1to met\u00f3da vhodn\u00e1 pre nepravideln\u00e9 alebo viacosov\u00e9 vibr\u00e1cie be\u017en\u00e9 v nosite\u013en\u00fdch zariadeniach a senzoroch.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Ako poznamen\u00e1va hlavn\u00fd autor: \u201e<\/span><i><span style=\"font-weight: 400\">Na\u0161e v\u00fdsledky ukazuj\u00fa, \u017ee starostlivo usporiadan\u00e9 magnetick\u00e9 pole v kombin\u00e1cii so spr\u00e1vnou magnetiz\u00e1ciou ferokvapaliny dok\u00e1\u017ee premeni\u0165 ka\u017edodenn\u00e9 mechanick\u00e9 vibr\u00e1cie na elektrick\u00fa energiu. To otv\u00e1ra cestu k skuto\u010dne samostatne nap\u00e1jan\u00fdm zariadeniam.<\/span><\/i><span style=\"font-weight: 400\">\u201c<\/span><\/p>\n<p><span style=\"font-weight: 400\">Hoci s\u00fa\u010dasn\u00e9 \u00farovne v\u00fdkonu zost\u00e1vaj\u00fa v nanowattovom rozsahu, autori predpokladaj\u00fa bud\u00face \u0161k\u00e1lovanie, vynutia cievok a ferokvapaln\u00e9 moduly by sa mohli kombinova\u0165 na dosiahnutie vy\u0161\u0161\u00edch v\u00fdkonov. Medzi potenci\u00e1lne aplik\u00e1cie patria samostatne nap\u00e1jan\u00e9 nosite\u013en\u00e9 senzory vy\u017eaduj\u00face mal\u00fa alebo \u017eiadnu kapacitu bat\u00e9rie, zabudovan\u00e9 vibra\u010dn\u00e9 senzory v priemyseln\u00fdch zariadeniach, ktor\u00e9 z\u00edskavaj\u00fa vlastn\u00fa energiu, a inteligentn\u00e9 syst\u00e9my na monitorovanie stavu kon\u0161trukcie, kde je v\u00fdmena bat\u00e9rie nepraktick\u00e1.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400\">O v\u00fdskume:<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u0160t\u00fadiu financovala Slovensk\u00e1 akad\u00e9mia vied, Ministerstvo \u0161kolstva a Agent\u00fara na podporu v\u00fdskumu a v\u00fdvoja.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Cit\u00e1cia:\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Rajnak M., Kurimsky J., Paulovicova K., Tothova J., Kiraly J., Cimbala R. <\/span><i><span style=\"font-weight: 400\">Vibration energy harvesting by ferrofluids in external magnetic fields<\/span><\/i><span style=\"font-weight: 400\">. Scientific Reports, vol. 15, Article 26701 (2025).<\/span><\/p>\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41598-025-12490-w\"><span style=\"font-weight: 400\">DOI: 10.1038\/s41598-025-12490-w<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Modern\u00e9 zariadenia, od fitness trackerov a inteligentn\u00e9ho oble\u010denia a\u017e po senzory internetu vec\u00ed (IoT), vy\u017eaduj\u00fa kompaktn\u00e9 a udr\u017eate\u013en\u00e9 zdroje energie. V novom v\u00fdskume publikovanom v&#8230;<\/p>\n","protected":false},"author":11,"featured_media":9653,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts\/9652"}],"collection":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/comments?post=9652"}],"version-history":[{"count":3,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts\/9652\/revisions"}],"predecessor-version":[{"id":9656,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts\/9652\/revisions\/9656"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/media\/9653"}],"wp:attachment":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/media?parent=9652"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/categories?post=9652"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/tags?post=9652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}