{"id":61488,"date":"2023-04-21T13:35:44","date_gmt":"2023-04-21T18:35:44","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/diy-ultrasonic-directional-speaker\/"},"modified":"2025-01-27T06:04:19","modified_gmt":"2025-01-27T11:04:19","slug":"diy-ultrasonic-directional-speaker","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/diy-ultrasonic-directional-speaker\/","title":{"rendered":"DIY sm\u011brov\u00fd ultrazvukov\u00fd reproduktor: n\u00e1vod"},"content":{"rendered":"<p>Ultrazvukov\u00e9 sm\u011brov\u00e9 reproduktory si v posledn\u00ed dob\u011b z\u00edsk\u00e1vaj\u00ed st\u00e1le v\u011bt\u0161\u00ed popularitu d\u00edky sv\u00e9 schopnosti p\u0159ehr\u00e1vat zvuk sm\u011brovan\u011b, minimalizuj\u00edc tak ne\u017e\u00e1douc\u00ed \u0161\u00ed\u0159en\u00ed zvuku do okol\u00ed.  Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na to, jak si takov\u00fd reproduktor vyrobit doma.  Proces nen\u00ed jednoduch\u00fd a vy\u017eaduje ur\u010dit\u00e9 znalosti elektroniky a akustiky, ale v\u00fdsledkem je fascinuj\u00edc\u00ed za\u0159\u00edzen\u00ed s unik\u00e1tn\u00edmi vlastnostmi.<\/p>\n<p>V\u00fdb\u011br komponent\u016f<\/p>\n<p>Z\u00e1kladem ka\u017ed\u00e9ho DIY ultrazvukov\u00e9ho sm\u011brov\u00e9ho reproduktoru je piezoelektrick\u00fd m\u011bni\u010d, kter\u00fd dok\u00e1\u017ee generovat ultrazvukov\u00e9 vlny.  Kl\u00ed\u010dov\u00e9 je zvolit m\u011bni\u010d s dostate\u010dnou frekvenc\u00ed a v\u00fdkonem.  Frekvence se pohybuje typicky v rozmez\u00ed 20 kHz a v\u00fd\u0161e.  V\u00fdb\u011br spr\u00e1vn\u00e9ho m\u011bni\u010de je kritick\u00fd pro kvalitu v\u00fdsledn\u00e9ho zvuku a dosa\u017eiteln\u00fd dosah.  Vzhledem k dostupnosti a kvalit\u011b doporu\u010dujeme pro za\u010d\u00e1te\u010dn\u00edky hledat m\u011bni\u010de s frekvenc\u00ed kolem 40kHz.  D\u016fle\u017eit\u00e1 je tak\u00e9 impedance m\u011bni\u010de, kter\u00e1 mus\u00ed b\u00fdt kompatibiln\u00ed s pou\u017eit\u00fdm zesilova\u010dem.  Krom\u011b m\u011bni\u010de budeme pot\u0159ebovat:<\/p>\n<ul>\n<li><strong>Zesilova\u010d:<\/strong>  Zesilova\u010d mus\u00ed b\u00fdt schopen poh\u00e1n\u011bt piezoelektrick\u00fd m\u011bni\u010d s dostate\u010dn\u00fdm v\u00fdkonem a v odpov\u00eddaj\u00edc\u00ed frekven\u010dn\u00ed oblasti.  M\u016f\u017eeme pou\u017e\u00edt speci\u00e1ln\u00ed zesilova\u010de pro ultrazvukov\u00e9 frekvence, nebo upravit st\u00e1vaj\u00edc\u00ed zesilova\u010de pro specifick\u00e9 po\u017eadavky.<\/li>\n<li><strong>Nap\u00e1jec\u00ed zdroj:<\/strong>  Stabiln\u00ed nap\u00e1jec\u00ed zdroj s dostate\u010dn\u00fdm proudem pro zesilova\u010d a m\u011bni\u010d.<\/li>\n<li><strong>Mikrofon:<\/strong>  Pro testov\u00e1n\u00ed a kalibraci syst\u00e9mu.<\/li>\n<li><strong>\u0158\u00eddic\u00ed obvod (voliteln\u00e9):<\/strong>  Pro pokro\u010dilej\u0161\u00ed funkce, jako je regulace hlasitosti a frekvence.<\/li>\n<li><strong>Sk\u0159\u00ed\u0148ka:<\/strong>  Pro uchycen\u00ed komponent\u016f a ochranu m\u011bni\u010de.<\/li>\n<\/ul>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Komponent<\/th>\n<th>Parametry<\/th>\n<th>Pozn\u00e1mka<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Piezoelektrick\u00fd m\u011bni\u010d<\/td>\n<td>Frekvence: 40kHz, V\u00fdkon: 5W, Impedance: 50\u03a9<\/td>\n<td>Kritick\u00fd pro kvalitu zvuku<\/td>\n<\/tr>\n<tr>\n<td>Zesilova\u010d<\/td>\n<td>V\u00fdkon: 10W, Frekvence: 20kHz &#8211; 100kHz<\/td>\n<td>Pot\u0159eba zesilova\u010de s dostate\u010dnou frekven\u010dn\u00ed odezvou<\/td>\n<\/tr>\n<tr>\n<td>Nap\u00e1jec\u00ed zdroj<\/td>\n<td>Nap\u011bt\u00ed: 12V, Proud: 2A<\/td>\n<td>Stabiln\u00ed nap\u00e1jec\u00ed zdroj je nezbytn\u00fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Mont\u00e1\u017e a zapojen\u00ed<\/p>\n<p>Po v\u00fdb\u011bru v\u0161ech komponent\u016f p\u0159istupujeme k mont\u00e1\u017ei a zapojen\u00ed.  Zesilova\u010d je napojen na nap\u00e1jec\u00ed zdroj, a jeho v\u00fdstup je propojen s piezoelektrick\u00fdm m\u011bni\u010dem.  Je d\u016fle\u017eit\u00e9 dodr\u017eet spr\u00e1vnou polaritu a chr\u00e1nit m\u011bni\u010d p\u0159ed mechanick\u00fdm po\u0161kozen\u00edm.  V\u0161echny sou\u010d\u00e1stky je vhodn\u00e9 um\u00edstit do pevn\u00e9 sk\u0159\u00ed\u0148ky, kter\u00e1 je z\u00e1rove\u0148 st\u00edn\u011bn\u00ed proti ru\u0161en\u00ed.  Pro dosa\u017een\u00ed sm\u011brov\u00e9ho efektu je d\u016fle\u017eit\u00e1 konstrukce sk\u0159\u00edn\u011b a jej\u00ed vztah k piezoelektrick\u00e9mu m\u011bni\u010di.  Experimentujte s r\u016fzn\u00fdmi tvary a velikostmi sk\u0159\u00edn\u011b, abyste dos\u00e1hli optim\u00e1ln\u00ed sm\u011brovosti.<\/p>\n<p>Kalibrace a testov\u00e1n\u00ed<\/p>\n<p>Po dokon\u010den\u00ed mont\u00e1\u017ee je pot\u0159eba prov\u00e9st kalibraci a testov\u00e1n\u00ed.  Pomoc\u00ed mikrofonu zm\u011b\u0159\u00edme akustick\u00fd tlak v r\u016fzn\u00fdch vzd\u00e1lenostech a \u00fahlech od reproduktoru.  T\u00edm zjist\u00edme optim\u00e1ln\u00ed nastaven\u00ed zesilova\u010de a ov\u011b\u0159\u00edme sm\u011brovost zvuku.  M\u016f\u017ee b\u00fdt nutn\u00e9 upravit zapojen\u00ed nebo parametry zesilova\u010de pro dosa\u017een\u00ed po\u017eadovan\u00fdch vlastnost\u00ed.<\/p>\n<p>Pokro\u010dilej\u0161\u00ed techniky<\/p>\n<p>Pro zlep\u0161en\u00ed kvality a sm\u011brovosti zvuku je mo\u017en\u00e9 pou\u017e\u00edt pokro\u010dilej\u0161\u00ed techniky, jako je f\u00e1zov\u00e9 \u0159\u00edzen\u00ed nebo pou\u017eit\u00ed v\u00edce piezoelektrick\u00fdch m\u011bni\u010d\u016f.  Tyto techniky vy\u017eaduj\u00ed hlub\u0161\u00ed znalosti akustiky a elektroniky.  Vyu\u017eit\u00ed digit\u00e1ln\u00edho zpracov\u00e1n\u00ed sign\u00e1lu (DSP) m\u016f\u017ee v\u00fdrazn\u011b zlep\u0161it kvalitu zvuku a umo\u017enit dal\u0161\u00ed pokro\u010dil\u00e9 funkce.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee konstrukce DIY ultrazvukov\u00e9ho sm\u011brov\u00e9ho reproduktoru je n\u00e1ro\u010dn\u00fd, ale z\u00e1rove\u0148 velmi obohacuj\u00edc\u00ed projekt.  Vy\u017eaduje ur\u010dit\u00e9 znalosti elektroniky a akustiky, ale v\u00fdsledkem je unik\u00e1tn\u00ed za\u0159\u00edzen\u00ed s mnoha mo\u017enostmi vyu\u017eit\u00ed.  Experimentujte s r\u016fzn\u00fdmi komponentami a technikami, abyste dos\u00e1hli optim\u00e1ln\u00edch v\u00fdsledk\u016f a objevili potenci\u00e1l t\u00e9to fascinuj\u00edc\u00ed technologie.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00e9 sm\u011brov\u00e9 reproduktory si v posledn\u00ed dob\u011b z\u00edsk\u00e1vaj\u00ed st\u00e1le v\u011bt\u0161\u00ed popularitu d\u00edky sv\u00e9 schopnosti p\u0159ehr\u00e1vat zvuk sm\u011brovan\u011b, minimalizuj\u00edc tak ne\u017e\u00e1douc\u00ed \u0161\u00ed\u0159en\u00ed zvuku do okol\u00ed. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na to, jak si takov\u00fd reproduktor vyrobit doma. Proces nen\u00ed jednoduch\u00fd a vy\u017eaduje ur\u010dit\u00e9 znalosti elektroniky a akustiky, ale v\u00fdsledkem je fascinuj\u00edc\u00ed za\u0159\u00edzen\u00ed s unik\u00e1tn\u00edmi vlastnostmi. V\u00fdb\u011br<\/p>\n","protected":false},"author":1,"featured_media":26478,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-61488","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\/61488","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=61488"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/61488\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/26478"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=61488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=61488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=61488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}