{"id":60405,"date":"2023-04-21T22:09:49","date_gmt":"2023-04-22T03:09:49","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-drive-ultrasonic-transducer\/"},"modified":"2025-01-27T06:08:13","modified_gmt":"2025-01-27T11:08:13","slug":"how-to-drive-ultrasonic-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-drive-ultrasonic-transducer\/","title":{"rendered":"\u0158\u00edzen\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de: Kompletn\u00ed pr\u016fvodce"},"content":{"rendered":"<p>Ultrazvukov\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v nejr\u016fzn\u011bj\u0161\u00edch oblastech, od pr\u016fmyslov\u00e9 automatizace a l\u00e9ka\u0159stv\u00ed a\u017e po automobilov\u00fd pr\u016fmysl.  Spr\u00e1vn\u00e9 \u0159\u00edzen\u00ed t\u011bchto sn\u00edma\u010d\u016f je kl\u00ed\u010dov\u00e9 pro dosa\u017een\u00ed optim\u00e1ln\u00edho v\u00fdkonu a spolehlivosti cel\u00e9ho syst\u00e9mu.  Tento \u010dl\u00e1nek se podrobn\u011b zam\u011b\u0159\u00ed na to, jak efektivn\u011b \u0159\u00eddit ultrazvukov\u00fd sn\u00edma\u010d.<\/p>\n<h3>Z\u00e1kladn\u00ed principy fungov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de<\/h3>\n<p>Ultrazvukov\u00e9 sn\u00edma\u010de, tak\u00e9 zn\u00e1m\u00e9 jako piezoelektrick\u00e9 sn\u00edma\u010de, generuj\u00ed ultrazvukov\u00e9 vlny pomoc\u00ed piezoelektrick\u00e9ho efektu.  Tento efekt popisuje schopnost n\u011bkter\u00fdch materi\u00e1l\u016f, jako je k\u0159emen nebo keramika, generovat elektrick\u00e9 nap\u011bt\u00ed p\u0159i mechanick\u00e9 deformaci a naopak.  V ultrazvukov\u00e9m sn\u00edma\u010di se elektrick\u00fd impuls aplikuje na piezoelektrick\u00fd element, kter\u00fd se n\u00e1sledn\u011b deformuje a generuje ultrazvukov\u00e9 vlny.  Tyto vlny se \u0161\u00ed\u0159\u00ed do okoln\u00edho prost\u0159ed\u00ed a po odrazu od p\u0159ek\u00e1\u017eky se vracej\u00ed zp\u011bt ke sn\u00edma\u010di, kde jsou op\u011bt p\u0159em\u011bn\u011bny na elektrick\u00fd sign\u00e1l.  D\u00e9lka trv\u00e1n\u00ed tohoto procesu ur\u010duje vzd\u00e1lenost k p\u0159ek\u00e1\u017ece.<\/p>\n<h3>Nap\u00e1jen\u00ed a \u0159\u00eddic\u00ed obvody<\/h3>\n<p>Pro spr\u00e1vn\u00e9 fungov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de je nezbytn\u00e9 dod\u00e1vat mu vhodn\u00e9 nap\u00e1jen\u00ed.  Nap\u011bt\u00ed a proud se li\u0161\u00ed v z\u00e1vislosti na typu sn\u00edma\u010de a jeho specifikac\u00edch, kter\u00e9 jsou uvedeny v jeho datov\u00e9m listu.  \u010casto se pou\u017e\u00edvaj\u00ed nap\u00e1jec\u00ed nap\u011bt\u00ed v rozsahu 5V a\u017e 24V DC.  \u0158\u00eddic\u00ed obvod se star\u00e1 o generov\u00e1n\u00ed spou\u0161t\u011bc\u00edch impuls\u016f pro vys\u00edl\u00e1n\u00ed ultrazvukov\u00fdch vln a n\u00e1sledn\u00e9 zpracov\u00e1n\u00ed p\u0159ijat\u00e9ho sign\u00e1lu.  Tento obvod m\u016f\u017ee zahrnovat kompar\u00e1tory, zesilova\u010de a filtry pro potla\u010den\u00ed \u0161umu.<\/p>\n<h3>Typy a vlastnosti 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\u00fdmi vlastnostmi a parametry.  V\u00fdb\u011br vhodn\u00e9ho typu z\u00e1vis\u00ed na konkr\u00e9tn\u00ed aplikaci.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Typ sn\u00edma\u010de<\/th>\n<th>Frekvence (kHz)<\/th>\n<th>Dosah (m)<\/th>\n<th>Sm\u011brovost<\/th>\n<th>Aplikace<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Vysokofrekven\u010dn\u00ed<\/td>\n<td>40-100<\/td>\n<td>0.1 &#8211; 1<\/td>\n<td>Vysok\u00e1<\/td>\n<td>M\u011b\u0159en\u00ed vzd\u00e1lenosti na kr\u00e1tkou vzd\u00e1lenost<\/td>\n<\/tr>\n<tr>\n<td>N\u00edzkofrekven\u010dn\u00ed<\/td>\n<td>20-40<\/td>\n<td>1 &#8211; 10<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<td>M\u011b\u0159en\u00ed vzd\u00e1lenosti na del\u0161\u00ed vzd\u00e1lenost<\/td>\n<\/tr>\n<tr>\n<td>Sn\u00edma\u010d s \u00fazk\u00fdm paprskem<\/td>\n<td>40-80<\/td>\n<td>0.5 &#8211; 5<\/td>\n<td>Vysok\u00e1<\/td>\n<td>P\u0159esn\u00e9 m\u011b\u0159en\u00ed vzd\u00e1lenosti<\/td>\n<\/tr>\n<tr>\n<td>Sn\u00edma\u010d s \u0161irok\u00fdm paprskem<\/td>\n<td>20-40<\/td>\n<td>1 &#8211; 10<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<td>Detekce p\u0159ek\u00e1\u017eek<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Zpracov\u00e1n\u00ed sign\u00e1lu a detekce p\u0159ek\u00e1\u017eek<\/h3>\n<p>P\u0159ijat\u00fd sign\u00e1l z ultrazvukov\u00e9ho sn\u00edma\u010de je obvykle slab\u00fd a obsahuje \u0161um.  Proto je nutn\u00e9 ho p\u0159ed dal\u0161\u00edm zpracov\u00e1n\u00edm zes\u00edlit a filtrovat.  Pro detekci p\u0159ek\u00e1\u017eek se pou\u017e\u00edvaj\u00ed r\u016fzn\u00e9 metody, jako je nap\u0159\u00edklad m\u011b\u0159en\u00ed doby letu sign\u00e1lu (Time of Flight &#8211; ToF) nebo anal\u00fdza amplitudy p\u0159ijat\u00e9ho sign\u00e1lu.  V\u00fdsledkem zpracov\u00e1n\u00ed sign\u00e1lu je informace o vzd\u00e1lenosti a p\u0159\u00edpadn\u011b i o dal\u0161\u00edch parametrech p\u0159ek\u00e1\u017eky.<\/p>\n<h3>Kalibrace a \u00fadr\u017eba<\/h3>\n<p>Pro dosa\u017een\u00ed p\u0159esn\u00fdch m\u011b\u0159en\u00ed je nezbytn\u00e1 kalibrace ultrazvukov\u00e9ho sn\u00edma\u010de.  Kalibrace se prov\u00e1d\u00ed porovn\u00e1n\u00edm nam\u011b\u0159en\u00fdch hodnot s referen\u010dn\u00edmi hodnotami.  Pravideln\u00e1 \u00fadr\u017eba sn\u00edma\u010de zahrnuje \u010di\u0161t\u011bn\u00ed jeho povrchu a kontrolu jeho funk\u010dnosti.  Po\u0161kozen\u00fd sn\u00edma\u010d m\u016f\u017ee v\u00e9st k nep\u0159esn\u00fdm m\u011b\u0159en\u00edm a poruch\u00e1m v cel\u00e9m syst\u00e9mu.  V n\u011bkter\u00fdch p\u0159\u00edpadech m\u016f\u017ee b\u00fdt nutn\u00e1 v\u00fdm\u011bna sn\u00edma\u010de.<\/p>\n<p>V z\u00e1v\u011bru lze \u0159\u00edci, \u017ee spr\u00e1vn\u00e9 \u0159\u00edzen\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de vy\u017eaduje pochopen\u00ed jeho z\u00e1kladn\u00edch princip\u016f fungov\u00e1n\u00ed, v\u00fdb\u011br vhodn\u00e9ho typu a nap\u00e1jen\u00ed,  efektivn\u00ed zpracov\u00e1n\u00ed sign\u00e1lu a pravidelnou \u00fadr\u017ebu.  Pou\u017eit\u00ed spr\u00e1vn\u00e9 techniky a dodr\u017eov\u00e1n\u00ed doporu\u010den\u00ed v\u00fdrobce, nap\u0159\u00edklad Beijing Ultrasonic,  zaru\u010d\u00ed dlouhou \u017eivotnost a spolehliv\u00fd provoz cel\u00e9ho syst\u00e9mu.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v nejr\u016fzn\u011bj\u0161\u00edch oblastech, od pr\u016fmyslov\u00e9 automatizace a l\u00e9ka\u0159stv\u00ed a\u017e po automobilov\u00fd pr\u016fmysl. Spr\u00e1vn\u00e9 \u0159\u00edzen\u00ed t\u011bchto sn\u00edma\u010d\u016f je kl\u00ed\u010dov\u00e9 pro dosa\u017een\u00ed optim\u00e1ln\u00edho v\u00fdkonu a spolehlivosti cel\u00e9ho syst\u00e9mu. Tento \u010dl\u00e1nek se podrobn\u011b zam\u011b\u0159\u00ed na to, jak efektivn\u011b \u0159\u00eddit ultrazvukov\u00fd sn\u00edma\u010d. Z\u00e1kladn\u00ed principy fungov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de Ultrazvukov\u00e9 sn\u00edma\u010de, tak\u00e9 zn\u00e1m\u00e9 jako piezoelektrick\u00e9 sn\u00edma\u010de,<\/p>\n","protected":false},"author":1,"featured_media":19412,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-60405","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\/60405","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=60405"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/60405\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19412"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=60405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=60405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=60405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}