{"id":61558,"date":"2023-04-21T13:38:23","date_gmt":"2023-04-21T18:38:23","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/diy-ultrasonic-generator\/"},"modified":"2025-01-27T06:04:21","modified_gmt":"2025-01-27T11:04:21","slug":"diy-ultrasonic-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/diy-ultrasonic-generator\/","title":{"rendered":"Ultrazvukov\u00fd gener\u00e1tor: DIY n\u00e1vod krok za krokem"},"content":{"rendered":"<p>Vytvo\u0159en\u00ed vlastn\u00edho ultrazvukov\u00e9ho gener\u00e1toru m\u016f\u017ee zn\u00edt jako n\u00e1ro\u010dn\u00fd \u00fakol, ale s trochou elektronick\u00fdch znalost\u00ed a pe\u010dliv\u00fdm postupem je to vcelku dosa\u017eiteln\u00e9.  Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na kl\u00ed\u010dov\u00e9 aspekty konstrukce takov\u00e9ho gener\u00e1toru, od v\u00fdb\u011bru sou\u010d\u00e1stek a\u017e po samotnou mont\u00e1\u017e a testov\u00e1n\u00ed.  Je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee pr\u00e1ce s vysokofrekven\u010dn\u00edmi obvody vy\u017eaduje opatrnost a dodr\u017eov\u00e1n\u00ed bezpe\u010dnostn\u00edch p\u0159edpis\u016f.<\/p>\n<h3>V\u00fdb\u011br piezoelektrick\u00e9ho m\u011bni\u010de<\/h3>\n<p>Srdcem ka\u017ed\u00e9ho ultrazvukov\u00e9ho gener\u00e1toru je piezoelektrick\u00fd m\u011bni\u010d.  Tento prvek p\u0159em\u011b\u0148uje elektrickou energii na mechanick\u00e9 vibrace a naopak.  Pro DIY projekty jsou b\u011b\u017en\u011b dostupn\u00e9 m\u011bni\u010de s r\u016fzn\u00fdmi frekvencemi a v\u00fdkony.  Volba z\u00e1vis\u00ed na zam\u00fd\u0161len\u00e9m pou\u017eit\u00ed gener\u00e1toru.  Ni\u017e\u0161\u00ed frekvence (nap\u0159. 40 kHz) jsou vhodn\u00e9 pro odpuzov\u00e1n\u00ed hmyzu, zat\u00edmco vy\u0161\u0161\u00ed frekvence (nap\u0159. 200 kHz a v\u00edce) se pou\u017e\u00edvaj\u00ed pro \u010di\u0161t\u011bn\u00ed nebo ultrazvukov\u00e9 sva\u0159ov\u00e1n\u00ed.  Je nutn\u00e9 zkontrolovat technick\u00e9 specifikace m\u011bni\u010de, zejm\u00e9na jeho rezonan\u010dn\u00ed frekvenci a impedanci.  Nep\u0159esnost v t\u00e9to f\u00e1zi m\u016f\u017ee v\u00e9st k nefunk\u010dn\u00edmu za\u0159\u00edzen\u00ed.<\/p>\n<h3>N\u00e1vrh elektronick\u00e9ho obvodu<\/h3>\n<p>Gener\u00e1tor ultrazvuku vy\u017eaduje oscil\u00e1tor, kter\u00fd generuje sinusov\u00fd sign\u00e1l na rezonan\u010dn\u00ed frekvenci piezoelektrick\u00e9ho m\u011bni\u010de.  Pro jednodu\u0161\u0161\u00ed projekty je mo\u017en\u00e9 pou\u017e\u00edt 555 \u010dasova\u010d IC, kter\u00fd je dostupn\u00fd a snadno se s n\u00edm pracuje.  Slo\u017eit\u011bj\u0161\u00ed obvody vyu\u017e\u00edvaj\u00ed mikrokontrol\u00e9ry, kter\u00e9 umo\u017e\u0148uj\u00ed p\u0159esn\u011bj\u0161\u00ed \u0159\u00edzen\u00ed frekvence a amplitudy v\u00fdstupn\u00edho sign\u00e1lu.  Pro dosa\u017een\u00ed dostate\u010dn\u00e9 amplitudy je \u010dasto pot\u0159eba pou\u017e\u00edt zesilova\u010d, kter\u00fd zvl\u00e1dne \u0159\u00eddit vysok\u00e9 nap\u011bt\u00ed pot\u0159ebn\u00e9 pro excitov\u00e1n\u00ed m\u011bni\u010de.  Je d\u016fle\u017eit\u00e9 db\u00e1t na spr\u00e1vnou impedan\u010dn\u00ed adaptaci mezi gener\u00e1torem a m\u011bni\u010dem, aby se dos\u00e1hlo optim\u00e1ln\u00edho p\u0159enosu energie.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Komponent<\/th>\n<th>Funkce<\/th>\n<th>Typick\u00e9 hodnoty<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Piezoelektrick\u00fd m\u011bni\u010d<\/td>\n<td>P\u0159em\u011bna elektrick\u00e9 energie na mechanick\u00e9 vibrace<\/td>\n<td>R\u016fzn\u00e9 frekvence a impedance<\/td>\n<\/tr>\n<tr>\n<td>555 \u010dasova\u010d (nebo mikrokontrol\u00e9r)<\/td>\n<td>Generace sinusov\u00e9ho sign\u00e1lu<\/td>\n<td>&#8211;<\/td>\n<\/tr>\n<tr>\n<td>Zesilova\u010d<\/td>\n<td>Zes\u00edlen\u00ed sign\u00e1lu<\/td>\n<td>Z\u00e1vis\u00ed na m\u011bni\u010di<\/td>\n<\/tr>\n<tr>\n<td>Tranzistory (nap\u0159. MOSFET)<\/td>\n<td>\u0158\u00edzen\u00ed v\u00fdkonov\u00e9ho zesilova\u010de<\/td>\n<td>Z\u00e1vis\u00ed na zvolen\u00e9m zesilova\u010di<\/td>\n<\/tr>\n<tr>\n<td>Nap\u00e1jec\u00ed zdroj<\/td>\n<td>Dod\u00e1vka energie<\/td>\n<td>Z\u00e1vis\u00ed na zvolen\u00fdch komponentech<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Mont\u00e1\u017e a testov\u00e1n\u00ed<\/h3>\n<p>Po sestaven\u00ed obvodu je nezbytn\u00e9 pe\u010dliv\u011b zkontrolovat v\u0161echny spoje a p\u0159ipojen\u00ed.  Doporu\u010duje se pou\u017eit\u00ed kvalitn\u00edch p\u00e1jec\u00edch technik a vhodn\u00fdch n\u00e1stroj\u016f.  P\u0159ed zapnut\u00edm gener\u00e1toru je nutn\u00e9 zkontrolovat nap\u00e1jec\u00ed nap\u011bt\u00ed a ujistit se, \u017ee je v souladu se specifikacemi pou\u017eit\u00fdch komponent.  Prvn\u00ed test by se m\u011bl prov\u00e1d\u011bt s n\u00edzkou amplitudou v\u00fdstupn\u00edho sign\u00e1lu, aby se p\u0159ede\u0161lo po\u0161kozen\u00ed m\u011bni\u010de.  Funk\u010dnost gener\u00e1toru se d\u00e1 ov\u011b\u0159it pomoc\u00ed osciloskopu, kter\u00fd zobraz\u00ed v\u00fdstupn\u00ed sign\u00e1l.  V p\u0159\u00edpad\u011b pot\u0159eby je mo\u017en\u00e9 upravit obvod pro dosa\u017een\u00ed optim\u00e1ln\u00edho v\u00fdkonu.<\/p>\n<h3>Bezpe\u010dnostn\u00ed opat\u0159en\u00ed<\/h3>\n<p>P\u0159i pr\u00e1ci s vysokofrekven\u010dn\u00edmi obvody je nutn\u00e9 dodr\u017eovat bezpe\u010dnostn\u00ed p\u0159edpisy.  Vysok\u00e9 nap\u011bt\u00ed m\u016f\u017ee zp\u016fsobit \u00faraz elektrick\u00fdm proudem, proto je d\u016fle\u017eit\u00e9 pracovat s odpojen\u00fdm nap\u00e1jen\u00edm a pou\u017e\u00edvat izola\u010dn\u00ed materi\u00e1ly.  Ultrazvukov\u00e9 vlny mohou b\u00fdt \u0161kodliv\u00e9 pro sluch, proto je vhodn\u00e9 pou\u017e\u00edvat ochranu sluchu.  V p\u0159\u00edpad\u011b jak\u00fdchkoliv pochybnost\u00ed je vhodn\u00e9 vyhledat odbornou pomoc.<\/p>\n<p>Konstrukce DIY ultrazvukov\u00e9ho gener\u00e1toru vy\u017eaduje technick\u00e9 znalosti a pe\u010dlivou pr\u00e1ci.  Spr\u00e1vn\u00fd v\u00fdb\u011br sou\u010d\u00e1stek, pe\u010dliv\u00e1 mont\u00e1\u017e a dodr\u017eov\u00e1n\u00ed bezpe\u010dnostn\u00edch p\u0159edpis\u016f jsou kl\u00ed\u010dov\u00e9 pro \u00fasp\u011bch projektu.  V\u00fdsledn\u00fd gener\u00e1tor m\u016f\u017ee naj\u00edt uplatn\u011bn\u00ed v mnoha oblastech, od amat\u00e9rsk\u00fdch projekt\u016f a\u017e po jednoduch\u00e9 pr\u016fmyslov\u00e9 aplikace.  V\u017edy je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee bezpe\u010dnost by m\u011bla b\u00fdt na prvn\u00edm m\u00edst\u011b.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vytvo\u0159en\u00ed vlastn\u00edho ultrazvukov\u00e9ho gener\u00e1toru m\u016f\u017ee zn\u00edt jako n\u00e1ro\u010dn\u00fd \u00fakol, ale s trochou elektronick\u00fdch znalost\u00ed a pe\u010dliv\u00fdm postupem je to vcelku dosa\u017eiteln\u00e9. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na kl\u00ed\u010dov\u00e9 aspekty konstrukce takov\u00e9ho gener\u00e1toru, od v\u00fdb\u011bru sou\u010d\u00e1stek a\u017e po samotnou mont\u00e1\u017e a testov\u00e1n\u00ed. Je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee pr\u00e1ce s vysokofrekven\u010dn\u00edmi obvody vy\u017eaduje opatrnost a dodr\u017eov\u00e1n\u00ed bezpe\u010dnostn\u00edch p\u0159edpis\u016f.<\/p>\n","protected":false},"author":1,"featured_media":19244,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-61558","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\/61558","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=61558"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/61558\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19244"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=61558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=61558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=61558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}