{"id":60896,"date":"2023-04-21T15:05:59","date_gmt":"2023-04-21T20:05:59","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-much-power-can-piezoelectric-generator\/"},"modified":"2025-01-27T06:06:45","modified_gmt":"2025-01-27T11:06:45","slug":"how-much-power-can-piezoelectric-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-much-power-can-piezoelectric-generator\/","title":{"rendered":"V\u00fdkon piezoelektrick\u00fdch gener\u00e1tor\u016f: limity a mo\u017enosti"},"content":{"rendered":"<p>Piezoelektrick\u00e9 gener\u00e1tory p\u0159edstavuj\u00ed fascinuj\u00edc\u00ed technologii s potenci\u00e1lem pro sklize\u0148 energie z mechanick\u00fdch vibrac\u00ed.  Ot\u00e1zka, kolik energie dok\u00e1\u017e\u00ed tyto gener\u00e1tory skute\u010dn\u011b vyprodukovat, je v\u0161ak komplexn\u00ed a z\u00e1vis\u00ed na mnoha faktorech.  Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na rozbor faktor\u016f ovliv\u0148uj\u00edc\u00edch v\u00fdkon piezoelektrick\u00fdch gener\u00e1tor\u016f a poskytne p\u0159ehled o jejich aktu\u00e1ln\u00edch mo\u017enostech.<\/p>\n<p>Materi\u00e1lov\u00e9 vlastnosti a geometrie<\/p>\n<p>V\u00fdkon piezoelektrick\u00e9ho gener\u00e1toru je prim\u00e1rn\u011b ur\u010den vlastnostmi pou\u017eit\u00e9ho piezoelektrick\u00e9ho materi\u00e1lu.  Nejd\u016fle\u017eit\u011bj\u0161\u00edmi parametry jsou piezoelektrick\u00fd koeficient (d33, d31), dielektrick\u00e1 konstanta a mechanick\u00e1 pevnost.  Materi\u00e1ly s vy\u0161\u0161\u00edm piezoelektrick\u00fdm koeficientem generuj\u00ed p\u0159i stejn\u00e9 deformaci v\u011bt\u0161\u00ed nap\u011bt\u00ed.  Geometrie gener\u00e1toru, v\u010detn\u011b tlou\u0161\u0165ky, plochy a tvaru piezoelektrick\u00e9ho prvku, tak\u00e9 v\u00fdznamn\u011b ovliv\u0148uje jeho v\u00fdkon. Tenk\u00e9 a \u0161irok\u00e9 prvky jsou obecn\u011b efektivn\u011bj\u0161\u00ed p\u0159i n\u00edzk\u00fdch frekvenc\u00edch, zat\u00edmco tlust\u00e9 a \u00fazk\u00e9 prvky jsou vhodn\u011bj\u0161\u00ed pro vy\u0161\u0161\u00ed frekvence.<\/p>\n<p>Frekvence a amplituda vibrac\u00ed<\/p>\n<p>Efektivita piezoelektrick\u00e9ho gener\u00e1toru je siln\u011b z\u00e1visl\u00e1 na frekvenci a amplitud\u011b vibrac\u00ed, kter\u00e9 na n\u011bj p\u016fsob\u00ed.  Ka\u017ed\u00fd gener\u00e1tor m\u00e1 rezonan\u010dn\u00ed frekvenci, p\u0159i kter\u00e9 dosahuje maxim\u00e1ln\u00edho v\u00fdkonu.  Odchylka od t\u00e9to frekvence vede k poklesu generovan\u00e9 energie.  Amplituda vibrac\u00ed p\u0159\u00edmo ovliv\u0148uje mno\u017estv\u00ed mechanick\u00e9 energie, kter\u00e1 se p\u0159em\u011bn\u00ed na elektrickou energii.  Vy\u0161\u0161\u00ed amplitudy znamenaj\u00ed vy\u0161\u0161\u00ed v\u00fdkon, ale jsou omezeny mechanickou pevnost\u00ed piezoelektrick\u00e9ho materi\u00e1lu.<\/p>\n<p>Impedan\u010dn\u00ed p\u0159izp\u016fsoben\u00ed<\/p>\n<p>Aby piezoelektrick\u00fd gener\u00e1tor mohl efektivn\u011b dod\u00e1vat energii do z\u00e1t\u011b\u017ee, je nezbytn\u00e9 spr\u00e1vn\u00e9 impedan\u010dn\u00ed p\u0159izp\u016fsoben\u00ed.  Impedance gener\u00e1toru se m\u011bn\u00ed s frekvenc\u00ed a z\u00e1vis\u00ed na materi\u00e1lov\u00fdch vlastnostech a geometrii.  Nesoulad impedance mezi gener\u00e1torem a z\u00e1t\u011b\u017e\u00ed vede k ztr\u00e1t\u00e1m energie.  Optim\u00e1ln\u00ed impedance z\u00e1t\u011b\u017ee se mus\u00ed volit s ohledem na charakteristiky gener\u00e1toru a po\u017eadavky aplikace.<\/p>\n<p>Porovn\u00e1n\u00ed r\u016fzn\u00fdch typ\u016f piezoelektrick\u00fdch gener\u00e1tor\u016f<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Typ gener\u00e1toru<\/th>\n<th>V\u00fdhody<\/th>\n<th>Nev\u00fdhody<\/th>\n<th>Typick\u00e1 hustota v\u00fdkonu (mW\/cm\u00b2)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tenk\u00e9 vrstvy<\/td>\n<td>Vysok\u00e1 hustota energie, flexibiln\u00ed<\/td>\n<td>N\u00edzk\u00e1 mechanick\u00e1 pevnost, obt\u00ed\u017en\u00e1 v\u00fdroba<\/td>\n<td>1-10<\/td>\n<\/tr>\n<tr>\n<td>Keramick\u00e9 prvky<\/td>\n<td>Vysok\u00e1 mechanick\u00e1 pevnost, snadn\u00e1 v\u00fdroba<\/td>\n<td>N\u00edzk\u00e1 hustota energie<\/td>\n<td>0.1-1<\/td>\n<\/tr>\n<tr>\n<td>Kompozitn\u00ed materi\u00e1ly<\/td>\n<td>Vysok\u00e1 flexibilita, n\u00edzk\u00e1 hmotnost<\/td>\n<td>Ni\u017e\u0161\u00ed hustota energie ne\u017e keramika<\/td>\n<td>0.5-5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Aplikace a limity<\/p>\n<p>Piezoelektrick\u00e9 gener\u00e1tory nach\u00e1zej\u00ed uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech, od senzor\u016f a akcelerometr\u016f a\u017e po syst\u00e9my pro sklize\u0148 energie z vibrac\u00ed.  Nicm\u00e9n\u011b, jejich v\u00fdkon je omezen.  Hustota v\u00fdkonu je obecn\u011b n\u00edzk\u00e1 ve srovn\u00e1n\u00ed s jin\u00fdmi technologiemi sklizn\u011b energie, jako jsou fotovoltaick\u00e9 \u010dl\u00e1nky.  V\u00fdkon je tak\u00e9 z\u00e1visl\u00fd na dostupn\u00e9 mechanick\u00e9 energii a efektivit\u011b konverze.  D\u00e1le, dlouhodob\u00e1 stabilita a spolehlivost piezoelektrick\u00fdch gener\u00e1tor\u016f vy\u017eaduj\u00ed pe\u010dliv\u00fd design a v\u00fdb\u011br materi\u00e1l\u016f.<\/p>\n<p>Piezoelektrick\u00e9 gener\u00e1tory p\u0159edstavuj\u00ed slibnou technologii pro sklize\u0148 energie z vibrac\u00ed, ale jejich v\u00fdkon je omezen materi\u00e1lov\u00fdmi vlastnostmi, frekvenc\u00ed a amplitudou vibrac\u00ed a impedan\u010dn\u00edm p\u0159izp\u016fsoben\u00edm.  A\u010dkoliv generovan\u00fd v\u00fdkon nen\u00ed zat\u00edm vysok\u00fd, neust\u00e1l\u00fd v\u00fdvoj materi\u00e1l\u016f a konstruk\u010dn\u00edch \u0159e\u0161en\u00ed slibuje zlep\u0161en\u00ed efektivity a roz\u0161\u00ed\u0159en\u00ed aplikac\u00ed t\u011bchto gener\u00e1tor\u016f v budoucnu.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Piezoelektrick\u00e9 gener\u00e1tory p\u0159edstavuj\u00ed fascinuj\u00edc\u00ed technologii s potenci\u00e1lem pro sklize\u0148 energie z mechanick\u00fdch vibrac\u00ed. Ot\u00e1zka, kolik energie dok\u00e1\u017e\u00ed tyto gener\u00e1tory skute\u010dn\u011b vyprodukovat, je v\u0161ak komplexn\u00ed a z\u00e1vis\u00ed na mnoha faktorech. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na rozbor faktor\u016f ovliv\u0148uj\u00edc\u00edch v\u00fdkon piezoelektrick\u00fdch gener\u00e1tor\u016f a poskytne p\u0159ehled o jejich aktu\u00e1ln\u00edch mo\u017enostech. Materi\u00e1lov\u00e9 vlastnosti a geometrie V\u00fdkon piezoelektrick\u00e9ho gener\u00e1toru je<\/p>\n","protected":false},"author":1,"featured_media":24648,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-60896","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/60896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/comments?post=60896"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/60896\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/24648"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=60896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=60896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=60896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}