{"id":57491,"date":"2023-04-22T03:09:29","date_gmt":"2023-04-22T08:09:29","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-stop-ultrasonic-waves\/"},"modified":"2025-01-27T06:12:22","modified_gmt":"2025-01-27T11:12:22","slug":"how-to-stop-ultrasonic-waves","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-stop-ultrasonic-waves\/","title":{"rendered":"\u00da\u010dinn\u00e1 ochrana p\u0159ed ultrazvukov\u00fdmi vlnami"},"content":{"rendered":"<p>Ultrazvukov\u00e9 vlny, neviditeln\u00e9 a nesly\u0161iteln\u00e9, nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech lidsk\u00e9ho \u017eivota, od medic\u00edny po pr\u016fmysl.  Av\u0161ak v n\u011bkter\u00fdch situac\u00edch je pot\u0159eba jejich \u0161\u00ed\u0159en\u00ed omezit \u010di zcela zastavit.  Jak toho dos\u00e1hnout?  N\u00e1sleduj\u00edc\u00ed text se zam\u011b\u0159uje na efektivn\u00ed metody potla\u010den\u00ed ultrazvuku.<\/p>\n<p>Absorpce ultrazvuku<\/p>\n<p>Nejjednodu\u0161\u0161\u00edm zp\u016fsobem, jak sn\u00ed\u017eit intenzitu ultrazvukov\u00fdch vln, je jejich absorpce.  Materi\u00e1ly s vysokou absorp\u010dn\u00ed kapacitou, jako jsou nap\u0159\u00edklad por\u00e9zn\u00ed materi\u00e1ly (guma, p\u011bna),  \u00fa\u010dinn\u011b sni\u017euj\u00ed energii ultrazvukov\u00fdch vln.  \u00da\u010dinnost absorpce z\u00e1vis\u00ed na frekvenci ultrazvuku a vlastnostech absorp\u010dn\u00edho materi\u00e1lu. Hust\u0161\u00ed materi\u00e1ly obecn\u011b absorbuj\u00ed v\u00edce energie.  Pro dosa\u017een\u00ed optim\u00e1ln\u00ed absorpce je d\u016fle\u017eit\u00e9 zvolit vhodn\u00fd materi\u00e1l a jeho tlou\u0161\u0165ku.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Materi\u00e1l<\/th>\n<th>Absorb\u010dn\u00ed schopnost (p\u0159ibli\u017en\u00e1)<\/th>\n<th>Frekven\u010dn\u00ed rozsah (kHz)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Polyuretanov\u00e1 p\u011bna<\/td>\n<td>Vysok\u00e1<\/td>\n<td>20 &#8211; 100<\/td>\n<\/tr>\n<tr>\n<td>Guma<\/td>\n<td>St\u0159edn\u00ed<\/td>\n<td>20 &#8211; 50<\/td>\n<\/tr>\n<tr>\n<td>Vlna<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<td>20 &#8211; 40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Odraz ultrazvuku<\/p>\n<p>Dal\u0161\u00ed \u00fa\u010dinnou metodou je odraz ultrazvukov\u00fdch vln.  Tvrd\u00e9 a hladk\u00e9 povrchy, jako je nap\u0159\u00edklad kov nebo sklo, odr\u00e1\u017eej\u00ed ultrazvuk velmi efektivn\u011b.  \u00dahel odrazu se rovn\u00e1 \u00fahlu dopadu.  Tato vlastnost se vyu\u017e\u00edv\u00e1 nap\u0159\u00edklad v ultrazvukov\u00fdch \u010didlech, kde se odraz vln vyu\u017e\u00edv\u00e1 k detekci objekt\u016f.  Pro \u00fa\u010dinn\u00e9 zablokov\u00e1n\u00ed ultrazvuku je nutn\u00e9 vytvo\u0159it bari\u00e9ru z materi\u00e1lu s vysokou odrazivost\u00ed, kter\u00e1 pohlt\u00ed nebo odraz\u00ed vlny zp\u011bt k jejich zdroji.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Materi\u00e1l<\/th>\n<th>Odrazivost (p\u0159ibli\u017en\u00e1)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ocel<\/td>\n<td>Vysok\u00e1<\/td>\n<\/tr>\n<tr>\n<td>Hlin\u00edk<\/td>\n<td>Vysok\u00e1<\/td>\n<\/tr>\n<tr>\n<td>Sklo<\/td>\n<td>St\u0159edn\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ru\u0161en\u00ed ultrazvuku<\/p>\n<p>Princip ru\u0161en\u00ed spo\u010d\u00edv\u00e1 v generov\u00e1n\u00ed protich\u016fdn\u00fdch vln, kter\u00e9 se navz\u00e1jem vyru\u0161\u00ed.  Tato metoda vy\u017eaduje p\u0159esn\u00e9 nastaven\u00ed frekvence a f\u00e1ze protich\u016fdn\u00fdch vln.  V praxi se tato technika pou\u017e\u00edv\u00e1 sp\u00ed\u0161e v \u0159\u00edzen\u00fdch prost\u0159ed\u00edch, nap\u0159\u00edklad v laborato\u0159\u00edch.  Je n\u00e1ro\u010dn\u00e1 na implementaci a vy\u017eaduje specializovan\u00e9 vybaven\u00ed.<\/p>\n<p>St\u00edn\u011bn\u00ed ultrazvuku<\/p>\n<p>Masivn\u00ed a hust\u00e9 materi\u00e1ly, jako je olov\u011bn\u00e9 st\u00edn\u011bn\u00ed, mohou efektivn\u011b blokovat ultrazvukov\u00e9 vlny.  Tato metoda je vhodn\u00e1 zejm\u00e9na pro vysokofrekven\u010dn\u00ed ultrazvuk.  Je v\u0161ak d\u016fle\u017eit\u00e9 zv\u00e1\u017eit hmotnost a n\u00e1klady na takov\u00e9 st\u00edn\u011bn\u00ed.<\/p>\n<p>Z\u00e1v\u011br<\/p>\n<p>Zastaven\u00ed ultrazvukov\u00fdch vln je mo\u017en\u00e9 r\u016fzn\u00fdmi metodami, ka\u017ed\u00e1 s vlastn\u00edmi v\u00fdhodami a nev\u00fdhodami.  V\u00fdb\u011br vhodn\u00e9 metody z\u00e1vis\u00ed na konkr\u00e9tn\u00ed aplikaci, frekvenci ultrazvuku a po\u017eadovan\u00e9 \u00farovni potla\u010den\u00ed.  Kombinac\u00ed n\u011bkolika metod je mo\u017en\u00e9 dos\u00e1hnout optim\u00e1ln\u00edch v\u00fdsledk\u016f.  Spr\u00e1vn\u00fd v\u00fdb\u011br materi\u00e1lu a konstrukce bari\u00e9ry je kl\u00ed\u010dov\u00fd pro efektivn\u00ed zablokov\u00e1n\u00ed ultrazvuku.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00e9 vlny, neviditeln\u00e9 a nesly\u0161iteln\u00e9, nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech lidsk\u00e9ho \u017eivota, od medic\u00edny po pr\u016fmysl. Av\u0161ak v n\u011bkter\u00fdch situac\u00edch je pot\u0159eba jejich \u0161\u00ed\u0159en\u00ed omezit \u010di zcela zastavit. Jak toho dos\u00e1hnout? N\u00e1sleduj\u00edc\u00ed text se zam\u011b\u0159uje na efektivn\u00ed metody potla\u010den\u00ed ultrazvuku. Absorpce ultrazvuku Nejjednodu\u0161\u0161\u00edm zp\u016fsobem, jak sn\u00ed\u017eit intenzitu ultrazvukov\u00fdch vln, je jejich absorpce. Materi\u00e1ly s<\/p>\n","protected":false},"author":1,"featured_media":26470,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-57491","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\/57491","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=57491"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57491\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/26470"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=57491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=57491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=57491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}