{"id":59863,"date":"2023-04-21T23:05:55","date_gmt":"2023-04-22T04:05:55","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-an-ultrasonic-sound-generator\/"},"modified":"2025-01-27T06:09:39","modified_gmt":"2025-01-27T11:09:39","slug":"how-to-make-an-ultrasonic-sound-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-make-an-ultrasonic-sound-generator\/","title":{"rendered":"Gener\u00e1tor ultrazvuku: N\u00e1vod krok za krokem"},"content":{"rendered":"<p>Ultrazvukov\u00e9 gener\u00e1tory nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v nejr\u016fzn\u011bj\u0161\u00edch oblastech, od l\u00e9ka\u0159stv\u00ed a pr\u016fmyslu a\u017e po spot\u0159ebn\u00ed elektroniku.  S trochou technick\u00e9 zru\u010dnosti a dostupn\u00fdch komponent\u016f je mo\u017en\u00e9 si takov\u00fd gener\u00e1tor vyrobit i doma.  N\u00e1sleduj\u00edc\u00ed \u010dl\u00e1nek popisuje krok za krokem, jak na to.<\/p>\n<h3>Volba piezoelektrick\u00e9ho m\u011bni\u010de<\/h3>\n<p>Z\u00e1kladem ka\u017ed\u00e9ho ultrazvukov\u00e9ho gener\u00e1toru je piezoelektrick\u00fd m\u011bni\u010d. Tento element p\u0159ev\u00e1d\u00ed elektrickou energii na mechanickou vibraci, a naopak. Pro generov\u00e1n\u00ed ultrazvuku se typicky pou\u017e\u00edvaj\u00ed m\u011bni\u010de s vysokou rezonan\u010dn\u00ed frekvenc\u00ed, obvykle v rozsahu des\u00edtek a\u017e stovek kilohertz\u016f.  V\u00fdb\u011br spr\u00e1vn\u00e9ho m\u011bni\u010de je kl\u00ed\u010dov\u00fd pro dosa\u017een\u00ed po\u017eadovan\u00fdch parametr\u016f generovan\u00e9ho zvuku.  D\u016fle\u017eit\u00e9 parametry, kter\u00e9 je t\u0159eba zv\u00e1\u017eit, jsou rezonan\u010dn\u00ed frekvence, impedance a rozm\u011bry m\u011bni\u010de.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Parametr<\/th>\n<th>Jednotka<\/th>\n<th>Typick\u00e1 hodnota pro ultrazvuk<\/th>\n<th>Pozn\u00e1mka<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Rezonan\u010dn\u00ed frekvence<\/td>\n<td>kHz<\/td>\n<td>40 &#8211; 100<\/td>\n<td>Z\u00e1vis\u00ed na po\u017eadovan\u00e9m rozsahu ultrazvuku<\/td>\n<\/tr>\n<tr>\n<td>Impedance<\/td>\n<td>\u03a9<\/td>\n<td>50 &#8211; 100<\/td>\n<td>Ovliv\u0148uje n\u00e1vrh \u0159\u00eddic\u00edho obvodu<\/td>\n<\/tr>\n<tr>\n<td>Rozm\u011bry<\/td>\n<td>mm<\/td>\n<td>10 &#8211; 50<\/td>\n<td>Ovliv\u0148uj\u00ed intenzitu a rozptyl zvuku<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>N\u00e1vrh a realizace \u0159\u00eddic\u00edho obvodu<\/h3>\n<p>\u0158\u00eddic\u00ed obvod je zodpov\u011bdn\u00fd za generov\u00e1n\u00ed vysokofrekven\u010dn\u00edho sign\u00e1lu, kter\u00fd je p\u0159iv\u00e1d\u011bn k piezoelektrick\u00e9mu m\u011bni\u010di.  Jednoduch\u00fd gener\u00e1tor lze postavit pomoc\u00ed opera\u010dn\u00edho zesilova\u010de a \u010dasova\u010de 555.  Pro dosa\u017een\u00ed vy\u0161\u0161\u00edch frekvenc\u00ed a p\u0159esn\u011bj\u0161\u00ed regulace je v\u0161ak vhodn\u011bj\u0161\u00ed pou\u017e\u00edt mikrokontrol\u00e9r, kter\u00fd umo\u017e\u0148uje sofistikovan\u011bj\u0161\u00ed \u0159\u00edzen\u00ed a generov\u00e1n\u00ed slo\u017eit\u011bj\u0161\u00edch sign\u00e1l\u016f.  Je d\u016fle\u017eit\u00e9 spr\u00e1vn\u011b dimenzovat obvod, aby se zabr\u00e1nilo po\u0161kozen\u00ed piezoelektrick\u00e9ho m\u011bni\u010de nadm\u011brn\u00fdm proudem.<\/p>\n<h3>Nap\u00e1jen\u00ed a ochrana obvodu<\/h3>\n<p>Gener\u00e1tor ultrazvuku vy\u017eaduje stabiln\u00ed nap\u00e1jec\u00ed zdroj, jeho\u017e nap\u011bt\u00ed a proud mus\u00ed odpov\u00eddat po\u017eadavk\u016fm piezoelektrick\u00e9ho m\u011bni\u010de a \u0159\u00eddic\u00edho obvodu.  Je nutn\u00e9 db\u00e1t na ochranu obvodu p\u0159ed p\u0159ep\u011bt\u00edm a p\u0159et\u00ed\u017een\u00edm.  Pou\u017eit\u00ed vhodn\u00fdch pojistek a varistor\u016f je nezbytn\u00e9 pro zaji\u0161t\u011bn\u00ed bezpe\u010dn\u00e9ho provozu.<\/p>\n<h3>Zkou\u0161en\u00ed a lad\u011bn\u00ed<\/h3>\n<p>Po sestaven\u00ed gener\u00e1toru je nutn\u00e9 jej d\u016fkladn\u011b otestovat a p\u0159\u00edpadn\u011b doladit.  M\u011b\u0159en\u00ed frekvence generovan\u00e9ho sign\u00e1lu a jeho amplitudy je kl\u00ed\u010dov\u00e9 pro ov\u011b\u0159en\u00ed spr\u00e1vn\u00e9 funk\u010dnosti za\u0159\u00edzen\u00ed.  Pro m\u011b\u0159en\u00ed ultrazvuku lze pou\u017e\u00edt speci\u00e1ln\u00ed m\u011b\u0159\u00edc\u00ed p\u0159\u00edstroje nebo software pro anal\u00fdzu zvuku.  Nastaven\u00ed optim\u00e1ln\u00edch parametr\u016f m\u016f\u017ee vy\u017eadovat iterativn\u00ed proces \u00faprav a m\u011b\u0159en\u00ed.<\/p>\n<h3>Bezpe\u010dnostn\u00ed opat\u0159en\u00ed<\/h3>\n<p>P\u0159i pr\u00e1ci s ultrazvukov\u00fdmi gener\u00e1tory je nezbytn\u00e9 dodr\u017eovat bezpe\u010dnostn\u00ed opat\u0159en\u00ed.  Ultrazvuk vysok\u00e9 intenzity m\u016f\u017ee b\u00fdt \u0161kodliv\u00fd pro sluch a tk\u00e1n\u011b.  Je nutn\u00e9 se vyvarovat p\u0159\u00edm\u00e9mu oz\u00e1\u0159en\u00ed ultrazvukem a pou\u017e\u00edvat ochrann\u00e9 pom\u016fcky, jako jsou sluch\u00e1tka nebo chr\u00e1ni\u010de sluchu.  P\u0159i manipulaci s vysokonap\u011b\u0165ov\u00fdmi \u010d\u00e1stmi obvodu je t\u0159eba dodr\u017eovat zvl\u00e1\u0161tn\u00ed opatrnost.<\/p>\n<p>Ultrazvukov\u00e9 gener\u00e1tory p\u0159edstavuj\u00ed fascinuj\u00edc\u00ed technologii s mnoha praktick\u00fdmi aplikacemi.  S pomoc\u00ed tohoto podrobn\u00e9ho n\u00e1vodu je mo\u017en\u00e9 si vyrobit vlastn\u00ed za\u0159\u00edzen\u00ed a prozkoumat tak fascinuj\u00edc\u00ed sv\u011bt ultrazvuku.  Nezapome\u0148te na d\u016fle\u017eitost bezpe\u010dnosti a dodr\u017eov\u00e1n\u00ed v\u0161ech bezpe\u010dnostn\u00edch p\u0159edpis\u016f.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00e9 gener\u00e1tory nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v nejr\u016fzn\u011bj\u0161\u00edch oblastech, od l\u00e9ka\u0159stv\u00ed a pr\u016fmyslu a\u017e po spot\u0159ebn\u00ed elektroniku. S trochou technick\u00e9 zru\u010dnosti a dostupn\u00fdch komponent\u016f je mo\u017en\u00e9 si takov\u00fd gener\u00e1tor vyrobit i doma. N\u00e1sleduj\u00edc\u00ed \u010dl\u00e1nek popisuje krok za krokem, jak na to. Volba piezoelektrick\u00e9ho m\u011bni\u010de Z\u00e1kladem ka\u017ed\u00e9ho ultrazvukov\u00e9ho gener\u00e1toru je piezoelektrick\u00fd m\u011bni\u010d. Tento element p\u0159ev\u00e1d\u00ed elektrickou energii<\/p>\n","protected":false},"author":1,"featured_media":19251,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-59863","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\/59863","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=59863"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/59863\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19251"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=59863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=59863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=59863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}