{"id":59092,"date":"2023-04-22T00:18:49","date_gmt":"2023-04-22T05:18:49","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-measure-ultrasonic-frequency\/"},"modified":"2025-01-27T06:11:41","modified_gmt":"2025-01-27T11:11:41","slug":"how-to-measure-ultrasonic-frequency","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-measure-ultrasonic-frequency\/","title":{"rendered":"M\u011b\u0159en\u00ed ultrazvukov\u00fdch frekvenc\u00ed: Praktick\u00fd n\u00e1vod"},"content":{"rendered":"<p>Ultrazvukov\u00e9 frekvence hraj\u00ed kl\u00ed\u010dovou roli v mnoha technologi\u00edch, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed po pr\u016fmyslovou kontrolu.  P\u0159esn\u00e9 m\u011b\u0159en\u00ed t\u011bchto frekvenc\u00ed je proto nezbytn\u00e9 pro zaji\u0161t\u011bn\u00ed spr\u00e1vn\u00e9 funkce a spolehlivosti t\u011bchto syst\u00e9m\u016f.  Existuje n\u011bkolik metod, jak ultrazvukovou frekvenci zm\u011b\u0159it, a volba vhodn\u00e9 metody z\u00e1vis\u00ed na po\u017eadovan\u00e9 p\u0159esnosti, dostupn\u00e9m vybaven\u00ed a charakteristik\u00e1ch m\u011b\u0159en\u00e9ho sign\u00e1lu.<\/p>\n<h3>Metody m\u011b\u0159en\u00ed ultrazvukov\u00e9 frekvence<\/h3>\n<p>Existuje n\u011bkolik metod pro m\u011b\u0159en\u00ed ultrazvukov\u00e9 frekvence, z nich\u017e ka\u017ed\u00e1 m\u00e1 sv\u00e9 v\u00fdhody a nev\u00fdhody.  Nejb\u011b\u017en\u011bj\u0161\u00ed metody zahrnuj\u00ed:<\/p>\n<ul>\n<li>\n<p><strong>Frekven\u010dn\u00ed \u010d\u00edta\u010d:<\/strong>  Jedn\u00e1 se o nejp\u0159\u00edm\u011bj\u0161\u00ed a nej\u010dast\u011bji pou\u017e\u00edvanou metodu.  Frekven\u010dn\u00ed \u010d\u00edta\u010d digit\u00e1ln\u011b po\u010d\u00edt\u00e1 po\u010det kmit\u016f ultrazvukov\u00e9ho sign\u00e1lu za dan\u00fd \u010dasov\u00fd interval.  V\u00fdsledkem je p\u0159esn\u00e1 hodnota frekvence.  Pro m\u011b\u0159en\u00ed vysok\u00fdch ultrazvukov\u00fdch frekvenc\u00ed je nutn\u00e9 pou\u017e\u00edt frekven\u010dn\u00ed \u010d\u00edta\u010d s dostate\u010dn\u011b vysokou vstupn\u00ed frekvenc\u00ed.<\/p>\n<\/li>\n<li>\n<p><strong>Oscila\u010dn\u00ed zobrazen\u00ed:<\/strong>  Oscilaoskop umo\u017e\u0148uje vizu\u00e1ln\u00ed anal\u00fdzu ultrazvukov\u00e9ho sign\u00e1lu.  M\u011b\u0159en\u00ed frekvence se prov\u00e1d\u00ed ur\u010den\u00edm periody sign\u00e1lu (\u010dasu jednoho kmitu) a n\u00e1sledn\u00fdm v\u00fdpo\u010dtem frekvence jako inverzn\u00ed hodnoty periody (f = 1\/T).  Tato metoda je m\u00e9n\u011b p\u0159esn\u00e1 ne\u017e pou\u017eit\u00ed frekven\u010dn\u00ed \u010d\u00edta\u010de, zvl\u00e1\u0161t\u011b u slo\u017eit\u011bj\u0161\u00edch sign\u00e1l\u016f.<\/p>\n<\/li>\n<li>\n<p><strong>Spektrometr:<\/strong>  Spektrometr analyzuje frekven\u010dn\u00ed slo\u017een\u00ed sign\u00e1lu a zobrazuje spektrum frekvenc\u00ed.  Tato metoda je u\u017eite\u010dn\u00e1 pro anal\u00fdzu slo\u017eit\u00fdch sign\u00e1l\u016f obsahuj\u00edc\u00edch v\u00edce frekvenc\u00ed, v\u010detn\u011b harmonick\u00fdch.  P\u0159esnost m\u011b\u0159en\u00ed z\u00e1vis\u00ed na rozli\u0161en\u00ed spektrometru.<\/p>\n<\/li>\n<li>\n<p><strong>Software pro anal\u00fdzu sign\u00e1lu:<\/strong>  Modern\u00ed software pro anal\u00fdzu sign\u00e1lu umo\u017e\u0148uje detailn\u00ed anal\u00fdzu zaznamenan\u00fdch ultrazvukov\u00fdch sign\u00e1l\u016f.  Mnoho program\u016f nab\u00edz\u00ed automatick\u00e9 m\u011b\u0159en\u00ed frekvence a dal\u0161\u00ed analytick\u00e9 n\u00e1stroje.<\/p>\n<\/li>\n<\/ul>\n<h3>Porovn\u00e1n\u00ed metod<\/h3>\n<p>N\u00e1sleduj\u00edc\u00ed tabulka shrnuje v\u00fdhody a nev\u00fdhody jednotliv\u00fdch metod m\u011b\u0159en\u00ed ultrazvukov\u00e9 frekvence:<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Metoda<\/th>\n<th>P\u0159esnost<\/th>\n<th>Komplexnost<\/th>\n<th>Cena<\/th>\n<th>Vhodn\u00e1 pro<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Frekven\u010dn\u00ed \u010d\u00edta\u010d<\/td>\n<td>Vysok\u00e1<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<td>St\u0159edn\u00ed a\u017e vysok\u00e1<\/td>\n<td>V\u011bt\u0161inu aplikac\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Oscilaoskop<\/td>\n<td>St\u0159edn\u00ed<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<td>N\u00edzk\u00e1 a\u017e st\u0159edn\u00ed<\/td>\n<td>Jednoduch\u00e9 sign\u00e1ly<\/td>\n<\/tr>\n<tr>\n<td>Spektrometr<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Slo\u017eit\u00e9 sign\u00e1ly<\/td>\n<\/tr>\n<tr>\n<td>Software pro anal\u00fdzu<\/td>\n<td>Vysok\u00e1 (z\u00e1vis\u00ed na SW)<\/td>\n<td>St\u0159edn\u00ed a\u017e vysok\u00e1<\/td>\n<td>St\u0159edn\u00ed a\u017e vysok\u00e1<\/td>\n<td>Rozmanit\u00e9 aplikace<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Kalibrace a p\u0159esnost<\/h3>\n<p>P\u0159esnost m\u011b\u0159en\u00ed ultrazvukov\u00e9 frekvence z\u00e1vis\u00ed na p\u0159esnosti pou\u017eit\u00fdch p\u0159\u00edstroj\u016f a spr\u00e1vn\u00e9 kalibraci.  Pravideln\u00e1 kalibrace frekven\u010dn\u00edch \u010d\u00edta\u010d\u016f a dal\u0161\u00edch p\u0159\u00edstroj\u016f je nezbytn\u00e1 pro zaji\u0161t\u011bn\u00ed spolehliv\u00fdch v\u00fdsledk\u016f.  Pro velmi p\u0159esn\u00e1 m\u011b\u0159en\u00ed je vhodn\u00e9 pou\u017e\u00edt kalibra\u010dn\u00ed standardy.  U n\u011bkter\u00fdch aplikac\u00ed, nap\u0159\u00edklad v medic\u00edn\u011b, je d\u016fle\u017eit\u00e1 i  stabilita m\u011b\u0159\u00edc\u00edho syst\u00e9mu.<\/p>\n<h3>Specifick\u00e9 po\u017eadavky na m\u011b\u0159en\u00ed<\/h3>\n<p>Volba konkr\u00e9tn\u00ed metody m\u011b\u0159en\u00ed z\u00e1vis\u00ed na specifick\u00fdch po\u017eadavc\u00edch dan\u00e9 aplikace.  Nap\u0159\u00edklad pro l\u00e9ka\u0159sk\u00e9 zobrazov\u00e1n\u00ed se vy\u017eaduje velmi vysok\u00e1 p\u0159esnost a stabilita m\u011b\u0159en\u00ed, zat\u00edmco pro n\u011bkter\u00e9 pr\u016fmyslov\u00e9 aplikace m\u016f\u017ee b\u00fdt dostate\u010dn\u00e1 ni\u017e\u0161\u00ed p\u0159esnost.  V n\u011bkter\u00fdch p\u0159\u00edpadech je nutn\u00e9 zv\u00e1\u017eit i vliv okoln\u00edho prost\u0159ed\u00ed na m\u011b\u0159en\u00ed, jako je nap\u0159\u00edklad teplota nebo vlhkosti.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee existuje n\u011bkolik efektivn\u00edch metod pro m\u011b\u0159en\u00ed ultrazvukov\u00e9 frekvence.  Volba nejvhodn\u011bj\u0161\u00ed metody z\u00e1vis\u00ed na po\u017eadovan\u00e9 p\u0159esnosti, slo\u017eitosti sign\u00e1lu a dostupn\u00e9m vybaven\u00ed.  D\u016fle\u017eit\u00e1 je i pravideln\u00e1 kalibrace m\u011b\u0159\u00edc\u00edch p\u0159\u00edstroj\u016f pro zaji\u0161t\u011bn\u00ed spolehlivosti v\u00fdsledk\u016f.  Pochopen\u00ed princip\u016f jednotliv\u00fdch metod a jejich omezen\u00ed je kl\u00ed\u010dov\u00e9 pro \u00fasp\u011b\u0161n\u00e9 m\u011b\u0159en\u00ed ultrazvukov\u00fdch frekvenc\u00ed v r\u016fzn\u00fdch aplikac\u00edch.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00e9 frekvence hraj\u00ed kl\u00ed\u010dovou roli v mnoha technologi\u00edch, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed po pr\u016fmyslovou kontrolu. P\u0159esn\u00e9 m\u011b\u0159en\u00ed t\u011bchto frekvenc\u00ed je proto nezbytn\u00e9 pro zaji\u0161t\u011bn\u00ed spr\u00e1vn\u00e9 funkce a spolehlivosti t\u011bchto syst\u00e9m\u016f. Existuje n\u011bkolik metod, jak ultrazvukovou frekvenci zm\u011b\u0159it, a volba vhodn\u00e9 metody z\u00e1vis\u00ed na po\u017eadovan\u00e9 p\u0159esnosti, dostupn\u00e9m vybaven\u00ed a charakteristik\u00e1ch m\u011b\u0159en\u00e9ho sign\u00e1lu. Metody m\u011b\u0159en\u00ed ultrazvukov\u00e9 frekvence Existuje<\/p>\n","protected":false},"author":1,"featured_media":26473,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-59092","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\/59092","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=59092"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/59092\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/26473"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=59092"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=59092"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=59092"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}