{"id":57596,"date":"2023-04-22T03:05:08","date_gmt":"2023-04-22T08:05:08","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-create-ultrasonic-sound\/"},"modified":"2025-01-27T06:08:01","modified_gmt":"2025-01-27T11:08:01","slug":"how-to-create-ultrasonic-sound","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-create-ultrasonic-sound\/","title":{"rendered":"Generov\u00e1n\u00ed ultrazvuku: Kompletn\u00ed pr\u016fvodce"},"content":{"rendered":"

Ultrazvuk, neboli zvuk s frekvenc\u00ed vy\u0161\u0161\u00ed ne\u017e 20 kHz, je pro lidsk\u00e9 ucho nesly\u0161iteln\u00fd, ale m\u00e1 \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech, od l\u00e9ka\u0159stv\u00ed po pr\u016fmysl. Jeho generov\u00e1n\u00ed vy\u017eaduje specifick\u00e9 postupy a technologie. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody v\u00fdroby ultrazvuku.<\/p>\n

Piezoelektrick\u00fd jev a jeho vyu\u017eit\u00ed<\/h3>\n

Nejpou\u017e\u00edvan\u011bj\u0161\u00ed metodou generov\u00e1n\u00ed ultrazvuku je vyu\u017eit\u00ed piezoelektrick\u00e9ho jevu. Tento jev spo\u010d\u00edv\u00e1 ve schopnosti n\u011bkter\u00fdch krystalick\u00fdch materi\u00e1l\u016f, jako je k\u0159emen nebo titan\u00e1t barnat\u00fd, m\u011bnit sv\u00e9 rozm\u011bry v z\u00e1vislosti na aplikovan\u00e9m elektrick\u00e9m poli. Aplikac\u00ed st\u0159\u00eddav\u00e9ho nap\u011bt\u00ed o vysok\u00e9 frekvenci na piezoelektrick\u00fd krystal se dos\u00e1hne jeho periodick\u00e9 deformace, kter\u00e1 generuje ultrazvukov\u00e9 vlny. Frekvence ultrazvuku je p\u0159\u00edmo \u00fam\u011brn\u00e1 frekvenci aplikovan\u00e9ho nap\u011bt\u00ed. Kvalita generovan\u00e9ho ultrazvuku z\u00e1vis\u00ed na \u0159ad\u011b faktor\u016f, v\u010detn\u011b kvality krystalu, jeho geometrie a preciznosti elektroniky \u0159\u00edd\u00edc\u00ed nap\u011bt\u00ed.<\/p>\n\n\n\n\n\n\n
Materi\u00e1l<\/th>\nFrekven\u010dn\u00ed rozsah (kHz)<\/th>\nV\u00fdhody<\/th>\nNev\u00fdhody<\/th>\n<\/tr>\n<\/thead>\n
K\u0159emen<\/td>\n10 – 1000<\/td>\nVysok\u00e1 stabilita frekvence, odolnost<\/td>\nK\u0159ehk\u00fd, n\u00edzk\u00e1 \u00fa\u010dinnost<\/td>\n<\/tr>\n
Titan\u00e1t barnat\u00fd<\/td>\n100 – 100000<\/td>\nVysok\u00e1 \u00fa\u010dinnost, flexibiln\u00ed tvarov\u00e1n\u00ed<\/td>\nM\u00e9n\u011b stabiln\u00ed frekvence, citlivost na teplotu<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Magnetostrik\u010dn\u00ed gener\u00e1tory ultrazvuku<\/h3>\n

Dal\u0161\u00edm zp\u016fsobem generov\u00e1n\u00ed ultrazvuku je vyu\u017eit\u00ed magnetostrik\u010dn\u00edho jevu. Magnetostrik\u010dn\u00ed materi\u00e1ly, nap\u0159\u00edklad n\u011bkter\u00e9 feromagnetick\u00e9 slitiny, 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 o vysok\u00e9 frekvenci na magnetostrik\u010dn\u00ed materi\u00e1l se dos\u00e1hne jeho periodick\u00e9 deformace, kter\u00e1 generuje ultrazvuku. Tato metoda se vyu\u017e\u00edv\u00e1 zejm\u00e9na pro generov\u00e1n\u00ed ultrazvuku o ni\u017e\u0161\u00edch frekvenc\u00edch a vy\u0161\u0161\u00edch v\u00fdkonech.<\/p>\n

Gener\u00e1tory ultrazvuku s vyu\u017eit\u00edm elektromagnetick\u00e9 indukce<\/h3>\n

M\u00e9n\u011b b\u011b\u017enou, ale st\u00e1le relevantn\u00ed metodou, je generov\u00e1n\u00ed ultrazvuku pomoc\u00ed elektromagnetick\u00e9 indukce. Tento princip se zakl\u00e1d\u00e1 na interakci mezi magnetick\u00fdm polem a vodiv\u00fdm materi\u00e1lem. Vytvo\u0159en\u00edm siln\u00e9ho, rychle se m\u011bn\u00edc\u00edho magnetick\u00e9ho pole v bl\u00edzkosti vodiv\u00e9ho t\u011blesa se indukuj\u00ed v\u00ed\u0159iv\u00e9 proudy, kter\u00e9 zp\u016fsobuj\u00ed jeho zah\u0159\u00edv\u00e1n\u00ed a n\u00e1slednou vibraci, kter\u00e1 vede k emisi ultrazvuku. Tato metoda je m\u00e9n\u011b efektivn\u00ed ne\u017e piezoelektrick\u00e1, ale m\u00e1 sv\u00e9 specifick\u00e9 aplikace.<\/p>\n

Aplikace ultrazvuku<\/h3>\n

Generovan\u00fd ultrazvuk nach\u00e1z\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech. V medic\u00edn\u011b se pou\u017e\u00edv\u00e1 k zobrazov\u00e1n\u00ed vnit\u0159n\u00edch org\u00e1n\u016f (ultrazvukov\u00e9 vy\u0161et\u0159en\u00ed), k terapii (ultrazvukov\u00e1 l\u00e9\u010dba) a k \u010di\u0161t\u011bn\u00ed n\u00e1stroj\u016f. V pr\u016fmyslu se vyu\u017e\u00edv\u00e1 k ultrazvukov\u00e9mu sva\u0159ov\u00e1n\u00ed, \u010di\u0161t\u011bn\u00ed, m\u011b\u0159en\u00ed vzd\u00e1lenost\u00ed a detekci vad. Ultrazvukov\u00e9 technologie jsou tak\u00e9 d\u016fle\u017eit\u00e9 v oblasti senzor\u016f a automatizace.<\/p>\n

Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee existuje n\u011bkolik efektivn\u00edch metod pro generov\u00e1n\u00ed ultrazvuku, z nich\u017e ka\u017ed\u00e1 m\u00e1 sv\u00e9 specifick\u00e9 v\u00fdhody a nev\u00fdhody. Volba konkr\u00e9tn\u00ed metody z\u00e1vis\u00ed na po\u017eadovan\u00e9 frekvenci, v\u00fdkonu a aplikaci ultrazvuku. Piezoelektrick\u00fd jev z\u016fst\u00e1v\u00e1 nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00ed metodou d\u00edky sv\u00e9 efektivit\u011b a relativn\u00ed jednoduchosti. Magnetostrik\u010dn\u00ed a elektromagnetick\u00e9 metody nach\u00e1zej\u00ed uplatn\u011bn\u00ed v specifick\u00fdch aplikac\u00edch, kde jsou vy\u017eadov\u00e1ny specifick\u00e9 vlastnosti generovan\u00e9ho ultrazvuku.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ultrazvuk, neboli zvuk s frekvenc\u00ed vy\u0161\u0161\u00ed ne\u017e 20 kHz, je pro lidsk\u00e9 ucho nesly\u0161iteln\u00fd, ale m\u00e1 \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech, od l\u00e9ka\u0159stv\u00ed po pr\u016fmysl. Jeho generov\u00e1n\u00ed vy\u017eaduje specifick\u00e9 postupy a technologie. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody v\u00fdroby ultrazvuku. Piezoelektrick\u00fd jev a jeho vyu\u017eit\u00ed Nejpou\u017e\u00edvan\u011bj\u0161\u00ed metodou generov\u00e1n\u00ed ultrazvuku je vyu\u017eit\u00ed piezoelektrick\u00e9ho jevu. Tento<\/p>\n","protected":false},"author":1,"featured_media":26474,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-57596","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\/57596","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=57596"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57596\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/26474"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=57596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=57596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=57596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}