{"id":57181,"date":"2023-04-25T14:55:49","date_gmt":"2023-04-25T19:55:49","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-an-ultrasonic-transducer\/"},"modified":"2025-01-27T06:17:09","modified_gmt":"2025-01-27T11:17:09","slug":"what-is-an-ultrasonic-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/what-is-an-ultrasonic-transducer\/","title":{"rendered":"Ultrazvukov\u00fd sn\u00edma\u010d: princip, pou\u017eit\u00ed a typy"},"content":{"rendered":"<p>Ultrazvukov\u00fd sn\u00edma\u010d, neboli transducer, je kl\u00ed\u010dov\u00fdm prvkem v mnoha aplikac\u00edch vyu\u017e\u00edvaj\u00edc\u00edch ultrazvuk.  Jeho funkce spo\u010d\u00edv\u00e1 v p\u0159em\u011bn\u011b elektrick\u00e9 energie na mechanick\u00e9 vibrace (ultrazvukov\u00e9 vlny) a naopak.  Tento proces je z\u00e1kladem pro \u0161irok\u00e9 spektrum technologi\u00ed, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed po pr\u016fmyslovou kontrolu materi\u00e1l\u016f.  Pochopen\u00ed jeho principu a charakteristik je nezbytn\u00e9 pro efektivn\u00ed vyu\u017eit\u00ed ultrazvukov\u00fdch syst\u00e9m\u016f.<\/p>\n<h3>Princip funkce ultrazvukov\u00e9ho sn\u00edma\u010de<\/h3>\n<p>Ultrazvukov\u00fd sn\u00edma\u010d pracuje na principu piezoelektrick\u00e9ho jevu.  Piezoelektrick\u00e9 materi\u00e1ly, jako je nap\u0159\u00edklad k\u0159emen nebo syntetick\u00e9 keramick\u00e9 materi\u00e1ly (nap\u0159. PZT \u2013 zirkonatan-titanan olovnat\u00fd), m\u011bn\u00ed svou fyzik\u00e1ln\u00ed strukturu v z\u00e1vislosti na aplikovan\u00e9m elektrick\u00e9m poli.  P\u0159i p\u0159iveden\u00ed elektrick\u00e9ho sign\u00e1lu se tyto materi\u00e1ly deformuj\u00ed a generuj\u00ed ultrazvukov\u00e9 vlny.  Naopak, kdy\u017e se na sn\u00edma\u010d aplikuje mechanick\u00e1 s\u00edla ve form\u011b ultrazvukov\u00fdch vln, generuje se v piezoelektrick\u00e9m materi\u00e1lu elektrick\u00fd sign\u00e1l.  Tato obousm\u011brn\u00e1 konverze je z\u00e1kladem funkce ultrazvukov\u00e9ho sn\u00edma\u010de.<\/p>\n<h3>Typy ultrazvukov\u00fdch sn\u00edma\u010d\u016f<\/h3>\n<p>Existuje n\u011bkolik typ\u016f ultrazvukov\u00fdch sn\u00edma\u010d\u016f, kter\u00e9 se li\u0161\u00ed sv\u00fdm designem, materi\u00e1lem a frekven\u010dn\u00edm rozsahem.  Mezi nej\u010dast\u011bj\u0161\u00ed pat\u0159\u00ed:<\/p>\n<ul>\n<li><strong>Kapacitn\u00ed sn\u00edma\u010de:<\/strong> Tyto sn\u00edma\u010de vyu\u017e\u00edvaj\u00ed zm\u011bny kapacity mezi dv\u011bma elektrodami zp\u016fsoben\u00e9 mechanick\u00fdmi vibracemi.<\/li>\n<li><strong>Piezoelektrick\u00e9 sn\u00edma\u010de:<\/strong>  Jak ji\u017e bylo zm\u00edn\u011bno, jsou to nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00ed typ sn\u00edma\u010d\u016f, kter\u00e9 vyu\u017e\u00edvaj\u00ed piezoelektrick\u00fd jev.<\/li>\n<li><strong>Magnetostrik\u010dn\u00ed sn\u00edma\u010de:<\/strong>  Tyto sn\u00edma\u010de vyu\u017e\u00edvaj\u00ed zm\u011bny magnetick\u00e9 permeability materi\u00e1lu v z\u00e1vislosti na mechanick\u00e9 deformaci.<\/li>\n<\/ul>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Typ sn\u00edma\u010de<\/th>\n<th>Princip funkce<\/th>\n<th>V\u00fdhody<\/th>\n<th>Nev\u00fdhody<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Kapacitn\u00ed<\/td>\n<td>Zm\u011bna kapacity mezi elektrodami<\/td>\n<td>Vysok\u00e1 citlivost, \u0161irok\u00fd frekven\u010dn\u00ed rozsah<\/td>\n<td>N\u00e1chylnost k vn\u011bj\u0161\u00edm vliv\u016fm, ni\u017e\u0161\u00ed robustnost<\/td>\n<\/tr>\n<tr>\n<td>Piezoelektrick\u00fd<\/td>\n<td>Piezoelektrick\u00fd jev<\/td>\n<td>Robustnost, vysok\u00e1 \u00fa\u010dinnost, \u0161irok\u00e9 vyu\u017eit\u00ed<\/td>\n<td>Omezen\u00fd frekven\u010dn\u00ed rozsah u n\u011bkter\u00fdch materi\u00e1l\u016f<\/td>\n<\/tr>\n<tr>\n<td>Magnetostrik\u010dn\u00ed<\/td>\n<td>Zm\u011bna magnetick\u00e9 permeability<\/td>\n<td>Vysok\u00e1 v\u00fdkonnost p\u0159i vysok\u00fdch frekvenc\u00edch<\/td>\n<td>Slo\u017eit\u011bj\u0161\u00ed konstrukce, vy\u0161\u0161\u00ed cena<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\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 r\u016fzn\u00fdch oblastech:<\/p>\n<ul>\n<li><strong>L\u00e9ka\u0159sk\u00e1 diagnostika:<\/strong> Ultrazvukov\u00e9 zobrazov\u00e1n\u00ed (sonografie) k diagnostice r\u016fzn\u00fdch onemocn\u011bn\u00ed.<\/li>\n<li><strong>Pr\u016fmyslov\u00e1 kontrola:<\/strong> Detekce vad v materi\u00e1lech, m\u011b\u0159en\u00ed tlou\u0161\u0165ky, monitorov\u00e1n\u00ed proces\u016f.<\/li>\n<li><strong>Automatizace:<\/strong> Senzory pro detekci objekt\u016f, m\u011b\u0159en\u00ed vzd\u00e1lenosti, \u0159\u00edzen\u00ed proces\u016f.<\/li>\n<li><strong>Biomedic\u00ednsk\u00e9 aplikace:<\/strong>  Terapie ultrazvukem, ultrazvukov\u00e1 lithotripsie.<\/li>\n<\/ul>\n<h3>Charakteristiky ultrazvukov\u00fdch sn\u00edma\u010d\u016f<\/h3>\n<p>D\u016fle\u017eit\u00e9 parametry ultrazvukov\u00e9ho sn\u00edma\u010de, kter\u00e9 ovliv\u0148uj\u00ed jeho v\u00fdkon a vhodn\u00e9 pou\u017eit\u00ed, zahrnuj\u00ed:<\/p>\n<ul>\n<li><strong>Frekvence:<\/strong>  Ur\u010duje rozli\u0161en\u00ed a hloubku pr\u016fniku ultrazvukov\u00fdch vln.<\/li>\n<li><strong>Citlivost:<\/strong>  M\u011b\u0159\u00ed schopnost sn\u00edma\u010de detekovat slab\u00e9 ultrazvukov\u00e9 sign\u00e1ly.<\/li>\n<li><strong>Sm\u011brovost:<\/strong>  Ur\u010duje \u00fahel \u0161\u00ed\u0159en\u00ed ultrazvukov\u00fdch vln.<\/li>\n<li><strong>Impedance:<\/strong>  Charakterizuje odpor materi\u00e1lu v\u016f\u010di \u0161\u00ed\u0159en\u00ed ultrazvukov\u00fdch vln.<\/li>\n<\/ul>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee ultrazvukov\u00e9 sn\u00edma\u010de jsou sofistikovan\u00e9 za\u0159\u00edzen\u00ed s \u0161irok\u00fdm spektrem aplikac\u00ed. Jejich funk\u010dnost je zalo\u017eena na principu p\u0159em\u011bny elektrick\u00e9 energie na mechanick\u00e9 vibrace a naopak, a jejich vlastnosti a charakteristiky je t\u0159eba pe\u010dliv\u011b zv\u00e1\u017eit p\u0159i v\u00fdb\u011bru pro specifick\u00e9 pou\u017eit\u00ed.  Pochopen\u00ed principu jejich funkce je kl\u00ed\u010dov\u00e9 pro efektivn\u00ed vyu\u017eit\u00ed ultrazvukov\u00fdch technologi\u00ed v r\u016fzn\u00fdch oblastech.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00fd sn\u00edma\u010d, neboli transducer, je kl\u00ed\u010dov\u00fdm prvkem v mnoha aplikac\u00edch vyu\u017e\u00edvaj\u00edc\u00edch ultrazvuk. Jeho funkce spo\u010d\u00edv\u00e1 v p\u0159em\u011bn\u011b elektrick\u00e9 energie na mechanick\u00e9 vibrace (ultrazvukov\u00e9 vlny) a naopak. Tento proces je z\u00e1kladem pro \u0161irok\u00e9 spektrum technologi\u00ed, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed po pr\u016fmyslovou kontrolu materi\u00e1l\u016f. Pochopen\u00ed jeho principu a charakteristik je nezbytn\u00e9 pro efektivn\u00ed vyu\u017eit\u00ed ultrazvukov\u00fdch syst\u00e9m\u016f. Princip funkce<\/p>\n","protected":false},"author":1,"featured_media":19422,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-57181","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\/57181","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=57181"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57181\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19422"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=57181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=57181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=57181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}