{"id":60290,"date":"2023-04-21T22:21:30","date_gmt":"2023-04-22T03:21:30","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-generate-ultrasonic-waves\/"},"modified":"2025-01-27T06:08:30","modified_gmt":"2025-01-27T11:08:30","slug":"how-to-generate-ultrasonic-waves","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-generate-ultrasonic-waves\/","title":{"rendered":"Generov\u00e1n\u00ed ultrazvukov\u00fdch vln: Kompletn\u00ed pr\u016fvodce"},"content":{"rendered":"<p>Ultrazvukov\u00e9 vlny, neviditeln\u00e9 nosi\u010de energie, nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech lidsk\u00e9ho \u017eivota, od l\u00e9ka\u0159stv\u00ed p\u0159es pr\u016fmysl a\u017e po dom\u00e1c\u00ed spot\u0159ebi\u010de.  Generov\u00e1n\u00ed t\u011bchto vln v\u0161ak nen\u00ed trivi\u00e1ln\u00ed z\u00e1le\u017eitost\u00ed a vy\u017eaduje pochopen\u00ed fyzik\u00e1ln\u00edch princip\u016f a specifick\u00fdch technologi\u00ed.  Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody generov\u00e1n\u00ed ultrazvuku a na faktory, kter\u00e9 ovliv\u0148uj\u00ed jejich efektivitu.<\/p>\n<p>Piezoelektrick\u00fd jev a jeho vyu\u017eit\u00ed<\/p>\n<p>Nejpou\u017e\u00edvan\u011bj\u0161\u00ed metodou generov\u00e1n\u00ed ultrazvukov\u00fdch vln je vyu\u017eit\u00ed piezoelektrick\u00e9ho jevu.  Tento jev popisuje schopnost n\u011bkter\u00fdch krystalick\u00fdch materi\u00e1l\u016f, jako je nap\u0159\u00edklad k\u0159emen nebo speci\u00e1ln\u00ed keramick\u00e9 materi\u00e1ly (nap\u0159. PZT &#8211; olovo-zirkon\u00e1t-titani\u010dit\u00fd), m\u011bnit sv\u00e9 rozm\u011bry v z\u00e1vislosti na aplikovan\u00e9m elektrick\u00e9m poli a naopak.  P\u0159i aplikaci st\u0159\u00eddav\u00e9ho nap\u011bt\u00ed na piezoelektrick\u00fd element se tento element periodicky rozp\u00edn\u00e1 a smr\u0161\u0165uje, \u010d\u00edm\u017e generuje mechanick\u00e9 vibrace, kter\u00e9 se \u0161\u00ed\u0159\u00ed jako ultrazvukov\u00e9 vlny.  Frekvence ultrazvukov\u00fdch vln je p\u0159\u00edmo \u00fam\u011brn\u00e1 frekvenci st\u0159\u00eddav\u00e9ho nap\u011bt\u00ed.  Kvalita generovan\u00e9ho ultrazvuku z\u00e1vis\u00ed na kvalit\u011b piezoelektrick\u00e9ho materi\u00e1lu, jeho geometrii a p\u0159esnosti \u0159\u00edd\u00edc\u00ed elektroniky.<\/p>\n<p>Magnetostrik\u010dn\u00ed gener\u00e1tory ultrazvuku<\/p>\n<p>Alternativn\u00ed metodou k piezoelektrick\u00e9mu generov\u00e1n\u00ed ultrazvuku je vyu\u017eit\u00ed magnetostrikce.  Magnetostrik\u010dn\u00ed materi\u00e1ly m\u011bn\u00ed sv\u00e9 rozm\u011bry v z\u00e1vislosti na aplikovan\u00e9m magnetick\u00e9m poli.  Aplikac\u00ed st\u0159\u00eddav\u00e9ho magnetick\u00e9ho pole na magnetostrik\u010dn\u00ed element se dos\u00e1hne periodick\u00e9ho rozp\u00edn\u00e1n\u00ed a smr\u0161\u0165ov\u00e1n\u00ed, generuj\u00edc\u00edho ultrazvukov\u00e9 vlny.  Magnetostrik\u010dn\u00ed gener\u00e1tory jsou typicky robustn\u011bj\u0161\u00ed a sn\u00e1\u0161ej\u00ed v\u011bt\u0161\u00ed mechanick\u00e9 zat\u00ed\u017een\u00ed ne\u017e piezoelektrick\u00e9 gener\u00e1tory, ale jejich \u00fa\u010dinnost m\u016f\u017ee b\u00fdt ni\u017e\u0161\u00ed.<\/p>\n<p>Srovn\u00e1n\u00ed piezoelektrick\u00fdch a magnetostrik\u010dn\u00edch gener\u00e1tor\u016f<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Vlastnost<\/th>\n<th>Piezoelektrick\u00fd gener\u00e1tor<\/th>\n<th>Magnetostrik\u010dn\u00ed gener\u00e1tor<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u00da\u010dinnost<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<td>Ni\u017e\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Robustnost<\/td>\n<td>Ni\u017e\u0161\u00ed<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Frekven\u010dn\u00ed rozsah<\/td>\n<td>\u0160ir\u0161\u00ed<\/td>\n<td>U\u017e\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Citlivost na teplotu<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<td>Ni\u017e\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Cena<\/td>\n<td>Obecn\u011b ni\u017e\u0161\u00ed<\/td>\n<td>Obecn\u011b vy\u0161\u0161\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Dal\u0161\u00ed metody generov\u00e1n\u00ed ultrazvuku<\/p>\n<p>Krom\u011b piezoelektrick\u00e9ho a magnetostrik\u010dn\u00edho jevu existuj\u00ed i dal\u0161\u00ed metody generov\u00e1n\u00ed ultrazvuku, i kdy\u017e jsou m\u00e9n\u011b roz\u0161\u00ed\u0159en\u00e9. Pat\u0159\u00ed mezi n\u011b nap\u0159\u00edklad generov\u00e1n\u00ed ultrazvuku pomoc\u00ed  elektrostatick\u00fdch pol\u00ed, optick\u00fdch metod (nap\u0159. laserem indukovan\u00e1 ultrazvukov\u00e1 emise)  nebo aerodynamick\u00fdmi metodami (nap\u0159. p\u00ed\u0161\u0165alky).  Tyto metody jsou \u010dasto specializovan\u00e9 a pou\u017e\u00edvaj\u00ed se pro specifick\u00e9 aplikace.<\/p>\n<p>Faktory ovliv\u0148uj\u00edc\u00ed kvalitu ultrazvuku<\/p>\n<p>Kvalita generovan\u00fdch ultrazvukov\u00fdch vln z\u00e1vis\u00ed na mnoha faktorech, v\u010detn\u011b kvality pou\u017eit\u00e9ho materi\u00e1lu, p\u0159esnosti v\u00fdroby piezoelektrick\u00e9ho prvku nebo magnetostrik\u010dn\u00edho transform\u00e1toru,  frekven\u010dn\u00ed stability \u0159\u00edd\u00edc\u00ed elektroniky a okoln\u00edch podm\u00ednek (teplota, tlak).  D\u016fle\u017eit\u00fdm faktorem je tak\u00e9 impedance prost\u0159ed\u00ed, do kter\u00e9ho se ultrazvukov\u00e9 vlny \u0161\u00ed\u0159\u00ed.  Optim\u00e1ln\u00ed p\u0159enos energie do prost\u0159ed\u00ed vy\u017eaduje spr\u00e1vn\u00e9 impedance matching.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee generov\u00e1n\u00ed ultrazvukov\u00fdch vln je komplexn\u00ed proces, kter\u00fd vyu\u017e\u00edv\u00e1 r\u016fzn\u00e9 fyzik\u00e1ln\u00ed jevy.  Piezoelektrick\u00e9 a magnetostrik\u010dn\u00ed gener\u00e1tory jsou nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00ed metody, ale existuj\u00ed i dal\u0161\u00ed, specializovan\u011bj\u0161\u00ed p\u0159\u00edstupy. Kvalita generovan\u00e9ho ultrazvuku z\u00e1vis\u00ed na \u0159ad\u011b faktor\u016f, jejich\u017e optimalizace je kl\u00ed\u010dov\u00e1 pro efektivn\u00ed vyu\u017eit\u00ed ultrazvuku v r\u016fzn\u00fdch aplikac\u00edch.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ultrazvukov\u00e9 vlny, neviditeln\u00e9 nosi\u010de energie, nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech lidsk\u00e9ho \u017eivota, od l\u00e9ka\u0159stv\u00ed p\u0159es pr\u016fmysl a\u017e po dom\u00e1c\u00ed spot\u0159ebi\u010de. Generov\u00e1n\u00ed t\u011bchto vln v\u0161ak nen\u00ed trivi\u00e1ln\u00ed z\u00e1le\u017eitost\u00ed a vy\u017eaduje pochopen\u00ed fyzik\u00e1ln\u00edch princip\u016f a specifick\u00fdch technologi\u00ed. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody generov\u00e1n\u00ed ultrazvuku a na faktory, kter\u00e9 ovliv\u0148uj\u00ed jejich efektivitu. Piezoelektrick\u00fd jev a<\/p>\n","protected":false},"author":1,"featured_media":26471,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-60290","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\/60290","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=60290"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/60290\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/26471"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=60290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=60290"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=60290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}