{"id":63131,"date":"2022-08-07T09:08:43","date_gmt":"2022-08-07T14:08:43","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/is-there-one-resonant-frequency-from-a-piezoceramic-sheet\/"},"modified":"2025-01-27T06:14:41","modified_gmt":"2025-01-27T11:14:41","slug":"is-there-one-resonant-frequency-from-a-piezoceramic-sheet","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/is-there-one-resonant-frequency-from-a-piezoceramic-sheet\/","title":{"rendered":"Rezonan\u010dn\u00ed frekvence piezoelektrick\u00e9 folie: Jednozna\u010dnost?"},"content":{"rendered":"

Piezokrystalick\u00e9 desti\u010dky nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech, od senzor\u016f a aktu\u00e1tor\u016f a\u017e po gener\u00e1tory ultrazvuku. Kloudn\u00e9 pochopen\u00ed jejich chov\u00e1n\u00ed je kl\u00ed\u010dov\u00e9 pro efektivn\u00ed design a aplikaci. Jednou z kl\u00ed\u010dov\u00fdch vlastnost\u00ed piezokrystalick\u00fdch desek je jejich rezonan\u010dn\u00ed frekvence. Ot\u00e1zka, zda existuje pouze jedna rezonan\u010dn\u00ed frekvence, je v\u0161ak komplexn\u011bj\u0161\u00ed, ne\u017e se na prvn\u00ed pohled zd\u00e1.<\/p>\n

Rezonan\u010dn\u00ed m\u00f3dy piezokrystalick\u00fdch desek<\/h3>\n

Piezokrystalick\u00e1 desti\u010dka, v z\u00e1vislosti na jej\u00edch rozm\u011brech a materi\u00e1lov\u00fdch vlastnostech, vykazuje v\u00edce ne\u017e jednu rezonan\u010dn\u00ed frekvenci. Tyto frekvence jsou spojeny s r\u016fzn\u00fdmi m\u00f3dy vibrac\u00ed desti\u010dky. Nejb\u011b\u017en\u011bj\u0161\u00ed jsou fundament\u00e1ln\u00ed m\u00f3dy, kter\u00e9 odpov\u00eddaj\u00ed nejni\u017e\u0161\u00edm rezonan\u010dn\u00edm frekvenc\u00edm. Tyto m\u00f3dy jsou charakterizov\u00e1ny jednoduch\u00fdmi vzory vibrac\u00ed, nap\u0159\u00edklad podle d\u00e9lky, \u0161\u00ed\u0159ky nebo tlou\u0161\u0165ky desti\u010dky. Vedle fundament\u00e1ln\u00edch m\u00f3d\u016f existuj\u00ed i vy\u0161\u0161\u00ed harmonick\u00e9 m\u00f3dy, kter\u00e9 odpov\u00eddaj\u00ed n\u00e1sobk\u016fm fundament\u00e1ln\u00ed frekvence, a slo\u017eit\u011bj\u0161\u00ed m\u00f3dy, kter\u00e9 kombinuj\u00ed vibra\u010dn\u00ed pohyby v r\u016fzn\u00fdch sm\u011brech.<\/p>\n

Vliv geometrie a materi\u00e1lu na rezonan\u010dn\u00ed frekvence<\/h3>\n

Geometrie piezokrystalick\u00e9 desti\u010dky m\u00e1 z\u00e1sadn\u00ed vliv na jej\u00ed rezonan\u010dn\u00ed frekvence. Del\u0161\u00ed, \u0161ir\u0161\u00ed nebo tlust\u0161\u00ed desti\u010dky budou m\u00edt ni\u017e\u0161\u00ed rezonan\u010dn\u00ed frekvence ne\u017e men\u0161\u00ed desti\u010dky. Materi\u00e1lov\u00e9 vlastnosti, jako je hustota a modul pru\u017enosti, rovn\u011b\u017e ovliv\u0148uj\u00ed rezonan\u010dn\u00ed frekvence. Tu\u017e\u0161\u00ed materi\u00e1ly s vy\u0161\u0161\u00edm modulem pru\u017enosti budou m\u00edt vy\u0161\u0161\u00ed rezonan\u010dn\u00ed frekvence ne\u017e m\u011bk\u010d\u00ed materi\u00e1ly.<\/p>\n\n\n\n\n\n\n\n\n\n
Parametr<\/th>\nVliv na rezonan\u010dn\u00ed frekvenci<\/th>\n<\/tr>\n<\/thead>\n
D\u00e9lka desti\u010dky<\/td>\nSni\u017euje frekvenci<\/td>\n<\/tr>\n
\u0160\u00ed\u0159ka desti\u010dky<\/td>\nSni\u017euje frekvenci<\/td>\n<\/tr>\n
Tlou\u0161\u0165ka desti\u010dky<\/td>\nSni\u017euje frekvenci<\/td>\n<\/tr>\n
Modul pru\u017enosti<\/td>\nZvy\u0161uje frekvenci<\/td>\n<\/tr>\n
Hustota materi\u00e1lu<\/td>\nSni\u017euje frekvenci<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Praktick\u00e9 d\u016fsledky existence v\u00edce rezonan\u010dn\u00edch frekvenc\u00ed<\/h3>\n

Existence v\u00edce rezonan\u010dn\u00edch frekvenc\u00ed m\u00e1 d\u016fle\u017eit\u00e9 praktick\u00e9 d\u016fsledky. P\u0159i n\u00e1vrhu za\u0159\u00edzen\u00ed vyu\u017e\u00edvaj\u00edc\u00edch piezokrystalick\u00e9 desti\u010dky, nap\u0159\u00edklad ultrazvukov\u00fdch \u010didel, je nutn\u00e9 pe\u010dliv\u011b zvolit provozn\u00ed frekvenci tak, aby se minimalizovaly ne\u017e\u00e1douc\u00ed vibrace na jin\u00fdch rezonan\u010dn\u00edch frekvenc\u00edch. To m\u016f\u017ee ovlivnit \u00fa\u010dinnost za\u0159\u00edzen\u00ed a jeho \u017eivotnost. Nep\u0159esnosti ve v\u00fdrob\u011b mohou zp\u016fsobit odchylky od o\u010dek\u00e1van\u00e9 rezonan\u010dn\u00ed frekvence, co\u017e je pot\u0159eba p\u0159i n\u00e1vrhu br\u00e1t v \u00favahu.<\/p>\n

Z\u00e1v\u011br<\/h3>\n

Piezokrystalick\u00e1 desti\u010dka nevykazuje pouze jednu rezonan\u010dn\u00ed frekvenci, ale sp\u00ed\u0161e spektrum frekvenc\u00ed odpov\u00eddaj\u00edc\u00edch r\u016fzn\u00fdm m\u00f3d\u016fm vibrac\u00ed. Pochopen\u00ed t\u011bchto m\u00f3d\u016f a jejich z\u00e1vislosti na geometrii a materi\u00e1lov\u00fdch vlastnostech desti\u010dky je kl\u00ed\u010dov\u00e9 pro efektivn\u00ed design a aplikaci piezokrystalick\u00fdch za\u0159\u00edzen\u00ed. P\u0159esn\u00e1 znalost rezonan\u010dn\u00edch frekvenc\u00ed je nezbytn\u00e1 pro optimalizaci v\u00fdkonu a spolehlivosti aplikac\u00ed, od p\u0159esn\u00fdch m\u011b\u0159en\u00ed a\u017e po generov\u00e1n\u00ed vysokofrekven\u010dn\u00edch ultrazvukov\u00fdch vln.<\/p>\n","protected":false},"excerpt":{"rendered":"

Piezokrystalick\u00e9 desti\u010dky nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech, od senzor\u016f a aktu\u00e1tor\u016f a\u017e po gener\u00e1tory ultrazvuku. Kloudn\u00e9 pochopen\u00ed jejich chov\u00e1n\u00ed je kl\u00ed\u010dov\u00e9 pro efektivn\u00ed design a aplikaci. Jednou z kl\u00ed\u010dov\u00fdch vlastnost\u00ed piezokrystalick\u00fdch desek je jejich rezonan\u010dn\u00ed frekvence. Ot\u00e1zka, zda existuje pouze jedna rezonan\u010dn\u00ed frekvence, je v\u0161ak komplexn\u011bj\u0161\u00ed, ne\u017e se na prvn\u00ed pohled zd\u00e1. Rezonan\u010dn\u00ed m\u00f3dy<\/p>\n","protected":false},"author":1,"featured_media":18820,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-63131","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\/63131","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=63131"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/63131\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/18820"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=63131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=63131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=63131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}