{"id":61156,"date":"2023-04-21T14:32:52","date_gmt":"2023-04-21T19:32:52","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-does-an-ultrasonic-transducer-work\/"},"modified":"2025-01-27T06:05:57","modified_gmt":"2025-01-27T11:05:57","slug":"how-does-an-ultrasonic-transducer-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-does-an-ultrasonic-transducer-work\/","title":{"rendered":"Ultrazvukov\u00fd sn\u00edma\u010d: princip funkce a vyu\u017eit\u00ed"},"content":{"rendered":"<p>Ultrazvukov\u00e9 sn\u00edma\u010de jsou kl\u00ed\u010dov\u00fdm komponentem v mnoha aplikac\u00edch, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed po pr\u016fmyslovou kontrolu. Jejich funk\u010dnost je zalo\u017eena na principu piezoelektrick\u00e9ho jevu, kter\u00fd umo\u017e\u0148uje p\u0159evod elektrick\u00e9 energie na mechanickou energii a naopak.  Tento \u010dl\u00e1nek podrobn\u011b vysv\u011btl\u00ed, jak tyto sn\u00edma\u010de funguj\u00ed.<\/p>\n<h3>Piezoelektrick\u00fd jev a jeho role<\/h3>\n<p>Z\u00e1kladn\u00ed princip fungov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de spo\u010d\u00edv\u00e1 v piezoelektrick\u00e9m jevu.  Tento jev popisuje schopnost n\u011bkter\u00fdch materi\u00e1l\u016f, jako je nap\u0159\u00edklad k\u0159emen nebo syntetick\u00e9 piezoelektrick\u00e9 keramiky (nap\u0159. PZT &#8211; olovo-zirkon\u00e1t-titan\u00e1t), generovat elektrick\u00e9 nap\u011bt\u00ed p\u0159i mechanick\u00e9 deformaci (p\u0159\u00edtlaku \u010di tlaku) a naopak se mechanicky deformovat p\u0159i aplikaci elektrick\u00e9ho pole.  V ultrazvukov\u00e9m sn\u00edma\u010di se tento jev vyu\u017e\u00edv\u00e1 k p\u0159evodu elektrick\u00fdch sign\u00e1l\u016f na mechanick\u00e9 vibrace (ultrazvukov\u00e9 vlny) a naopak.<\/p>\n<h3>Konstrukce ultrazvukov\u00e9ho sn\u00edma\u010de<\/h3>\n<p>Ultrazvukov\u00fd sn\u00edma\u010d se typicky skl\u00e1d\u00e1 z n\u011bkolika kl\u00ed\u010dov\u00fdch \u010d\u00e1st\u00ed:<\/p>\n<ul>\n<li><strong>Piezoelektrick\u00fd prvek:<\/strong> Toto je srdce sn\u00edma\u010de, zodpov\u011bdn\u00e9 za p\u0159em\u011bnu elektrick\u00e9 energie na mechanick\u00e9 vibrace a naopak.  Jeho velikost a tvar ovliv\u0148uj\u00ed frekvenci generovan\u00fdch ultrazvukov\u00fdch vln.<\/li>\n<li><strong>Tlumi\u010d:<\/strong>  Tlum\u00ed ne\u017e\u00e1douc\u00ed vibrace a zlep\u0161uje kvalitu sign\u00e1lu.<\/li>\n<li><strong>Ochrann\u00fd kryt:<\/strong> Chr\u00e1n\u00ed piezoelektrick\u00fd prvek p\u0159ed po\u0161kozen\u00edm.<\/li>\n<li><strong>Elektrody:<\/strong>  Umo\u017e\u0148uj\u00ed p\u0159ipojen\u00ed elektrick\u00e9ho nap\u011bt\u00ed k piezoelektrick\u00e9mu prvku.<\/li>\n<li><strong>Akustiko-mechanick\u00fd adapt\u00e9r (Matching Layer):<\/strong>  Optimalizuje p\u0159enos ultrazvukov\u00e9 energie mezi sn\u00edma\u010dem a prost\u0159ed\u00edm.<\/li>\n<\/ul>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>\u010c\u00e1st sn\u00edma\u010de<\/th>\n<th>Funkce<\/th>\n<th>Materi\u00e1l<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Piezoelektrick\u00fd prvek<\/td>\n<td>P\u0159evod elektrick\u00e9\/mechanick\u00e9 energie<\/td>\n<td>PZT keramika, k\u0159emen<\/td>\n<\/tr>\n<tr>\n<td>Tlumi\u010d<\/td>\n<td>Tlumen\u00ed ne\u017e\u00e1douc\u00edch vibrac\u00ed<\/td>\n<td>Speci\u00e1ln\u00ed polymery<\/td>\n<\/tr>\n<tr>\n<td>Ochrann\u00fd kryt<\/td>\n<td>Ochrana piezoelektrick\u00e9ho prvku<\/td>\n<td>Kov, plast<\/td>\n<\/tr>\n<tr>\n<td>Elektrody<\/td>\n<td>P\u0159\u00edvod elektrick\u00e9ho nap\u011bt\u00ed<\/td>\n<td>Kov<\/td>\n<\/tr>\n<tr>\n<td>Akustiko-mechanick\u00fd adapt\u00e9r<\/td>\n<td>Optimalizace p\u0159enosu energie<\/td>\n<td>R\u016fzn\u00e9 materi\u00e1ly dle aplikace<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Generov\u00e1n\u00ed a detekce ultrazvukov\u00fdch vln<\/h3>\n<p>Kdy\u017e se na piezoelektrick\u00fd prvek p\u0159ivede elektrick\u00e9 nap\u011bt\u00ed, prvek se deformuje a generuje ultrazvukov\u00e9 vlny.  Frekvence t\u011bchto vln je z\u00e1visl\u00e1 na vlastnostech piezoelektrick\u00e9ho prvku a jeho rozm\u011brech.  P\u0159i dopadu ultrazvukov\u00fdch vln na objekt se odr\u00e1\u017eej\u00ed zp\u011bt k sn\u00edma\u010di.  Odra\u017een\u00e9 vlny zp\u016fsob\u00ed deformaci piezoelektrick\u00e9ho prvku, co\u017e vede k generov\u00e1n\u00ed elektrick\u00e9ho sign\u00e1lu.  Tento sign\u00e1l pak obsahuje informace o vzd\u00e1lenosti, tvaru a vlastnostech objektu.<\/p>\n<h3>Aplikace ultrazvukov\u00fdch sn\u00edma\u010d\u016f<\/h3>\n<p>Ultrazvukov\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech, nap\u0159\u00edklad:<\/p>\n<ul>\n<li><strong>L\u00e9ka\u0159sk\u00e1 diagnostika:<\/strong> Ultrasonografie vyu\u017e\u00edv\u00e1 ultrazvukov\u00e9 vlny k zobrazov\u00e1n\u00ed vnit\u0159n\u00edch org\u00e1n\u016f.<\/li>\n<li><strong>Pr\u016fmyslov\u00e1 kontrola:<\/strong> Detekce vad v materi\u00e1lech, m\u011b\u0159en\u00ed tlou\u0161\u0165ky materi\u00e1l\u016f.<\/li>\n<li><strong>Automatizace:<\/strong> Senzory pro m\u011b\u0159en\u00ed vzd\u00e1lenosti, detekce pohybu.<\/li>\n<li><strong>M\u011b\u0159en\u00ed pr\u016ftoku:<\/strong>  M\u011b\u0159en\u00ed rychlosti a objemu tekutin.<\/li>\n<\/ul>\n<h3>Z\u00e1v\u011br<\/h3>\n<p>Ultrazvukov\u00e9 sn\u00edma\u010de jsou vysoce univerz\u00e1ln\u00ed za\u0159\u00edzen\u00ed, jejich\u017e funk\u010dnost je zalo\u017eena na piezoelektrick\u00e9m jevu.  D\u00edky schopnosti generovat a detekovat ultrazvukov\u00e9 vlny nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oborech.  Pokrok v materi\u00e1lech a technologi\u00edch neust\u00e1le roz\u0161i\u0159uje jejich mo\u017enosti a zlep\u0161uje jejich p\u0159esnost a spolehlivost.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00e9 sn\u00edma\u010de jsou kl\u00ed\u010dov\u00fdm komponentem v mnoha aplikac\u00edch, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed po pr\u016fmyslovou kontrolu. Jejich funk\u010dnost je zalo\u017eena na principu piezoelektrick\u00e9ho jevu, kter\u00fd umo\u017e\u0148uje p\u0159evod elektrick\u00e9 energie na mechanickou energii a naopak. Tento \u010dl\u00e1nek podrobn\u011b vysv\u011btl\u00ed, jak tyto sn\u00edma\u010de funguj\u00ed. Piezoelektrick\u00fd jev a jeho role Z\u00e1kladn\u00ed princip fungov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de spo\u010d\u00edv\u00e1 v piezoelektrick\u00e9m jevu. Tento<\/p>\n","protected":false},"author":1,"featured_media":19415,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-61156","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\/61156","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=61156"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/61156\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19415"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=61156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=61156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=61156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}