{"id":57786,"date":"2023-04-22T02:57:15","date_gmt":"2023-04-22T07:57:15","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-ultrasonic-sound-waves\/"},"modified":"2025-01-27T06:11:32","modified_gmt":"2025-01-27T11:11:32","slug":"how-to-make-ultrasonic-sound-waves","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-make-ultrasonic-sound-waves\/","title":{"rendered":"Generov\u00e1n\u00ed ultrazvukov\u00fdch vln: Praktick\u00fd n\u00e1vod"},"content":{"rendered":"

Ultrazvukov\u00e9 vlny nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech, od l\u00e9ka\u0159stv\u00ed p\u0159es pr\u016fmysl a\u017e po spot\u0159ebn\u00ed elektroniku. Pochopen\u00ed princip\u016f jejich generov\u00e1n\u00ed je kl\u00ed\u010dov\u00e9 pro pochopen\u00ed jejich funk\u010dnosti a aplikac\u00ed. Tento \u010dl\u00e1nek se podrobn\u011b zam\u011b\u0159\u00ed na to, jak se ultrazvukov\u00e9 vlny vytv\u00e1\u0159ej\u00ed.<\/p>\n

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

Z\u00e1kladn\u00edm principem generov\u00e1n\u00ed ultrazvukov\u00fdch vln je piezoelektrick\u00fd jev. Tento jev spo\u010d\u00edv\u00e1 v schopnosti n\u011bkter\u00fdch krystalick\u00fdch materi\u00e1l\u016f, jako je nap\u0159\u00edklad k\u0159emen nebo keramika (nap\u0159. titan\u00e1t barnat\u00fd), m\u011bnit svou geometrii pod vlivem elektrick\u00e9ho pole a naopak generovat elektrick\u00e9 nap\u011bt\u00ed p\u0159i mechanick\u00e9m nam\u00e1h\u00e1n\u00ed. Aplikac\u00ed st\u0159\u00eddav\u00e9ho elektrick\u00e9ho nap\u011bt\u00ed na piezoelektrick\u00fd prvek se dos\u00e1hne jeho periodick\u00e9 deformace, kter\u00e1 generuje mechanick\u00e9 vibrace o frekvenci odpov\u00eddaj\u00edc\u00ed frekvenci aplikovan\u00e9ho nap\u011bt\u00ed. Pokud je tato frekvence v ultrazvukov\u00e9m spektru (nad 20 kHz), vzniknou ultrazvukov\u00e9 vlny.<\/p>\n

Konstrukce ultrazvukov\u00e9ho p\u0159evodn\u00edku<\/p>\n

Ultrazvukov\u00fd p\u0159evodn\u00edk, neboli transduktor, se skl\u00e1d\u00e1 z piezoelektrick\u00e9ho prvku, kter\u00fd je obvykle vlo\u017een mezi dv\u011b kovov\u00e9 elektrody. Elektrody slou\u017e\u00ed k p\u0159iv\u00e1d\u011bn\u00ed elektrick\u00e9ho nap\u011bt\u00ed. Cel\u00fd syst\u00e9m je \u010dasto zabalen do ochrann\u00e9ho pouzdra, kter\u00e9 m\u016f\u017ee b\u00fdt vyrobeno z r\u016fzn\u00fdch materi\u00e1l\u016f v z\u00e1vislosti na zam\u00fd\u0161len\u00e9m pou\u017eit\u00ed. Pro optimalizaci p\u0159enosu energie do prost\u0159ed\u00ed se pou\u017e\u00edvaj\u00ed r\u016fzn\u00e9 konstruk\u010dn\u00ed prvky, jako jsou akustick\u00e9 \u010do\u010dky nebo tlumi\u010de.<\/p>\n\n\n\n\n\n\n
Materi\u00e1l piezoelektrick\u00e9ho prvku<\/th>\nV\u00fdhody<\/th>\nNev\u00fdhody<\/th>\n<\/tr>\n<\/thead>\n
K\u0159emen<\/td>\nVysok\u00e1 stabilita frekvence, odolnost<\/td>\nVysok\u00e1 cena, n\u00edzk\u00e1 \u00fa\u010dinnost<\/td>\n<\/tr>\n
Titan\u00e1t barnat\u00fd<\/td>\nVysok\u00e1 \u00fa\u010dinnost, n\u00edzk\u00e1 cena<\/td>\nNi\u017e\u0161\u00ed stabilita frekvence, m\u00e9n\u011b odoln\u00fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Frekvence a vlnov\u00e1 d\u00e9lka<\/p>\n

Frekvence ultrazvukov\u00fdch vln je kl\u00ed\u010dov\u00fdm parametrem, kter\u00fd ur\u010duje jejich vlastnosti a aplikace. Frekvence se pohybuje od 20 kHz do n\u011bkolika GHz. Vlnov\u00e1 d\u00e9lka ultrazvuku je z\u00e1visl\u00e1 na frekvenci a rychlosti \u0161\u00ed\u0159en\u00ed v dan\u00e9m prost\u0159ed\u00ed. Vy\u0161\u0161\u00ed frekvence znamenaj\u00ed krat\u0161\u00ed vlnovou d\u00e9lku, co\u017e m\u00e1 d\u016fsledky pro rozli\u0161en\u00ed a hloubku penetrace.<\/p>\n

Typy ultrazvukov\u00fdch p\u0159evodn\u00edk\u016f<\/p>\n

Existuje mnoho r\u016fzn\u00fdch typ\u016f ultrazvukov\u00fdch p\u0159evodn\u00edk\u016f, kter\u00e9 se li\u0161\u00ed tvarem, velikost\u00ed, frekvenc\u00ed a aplikac\u00ed. N\u011bkter\u00e9 b\u011b\u017en\u00e9 typy zahrnuj\u00ed:<\/p>\n

    \n
  • Ploch\u00e9 p\u0159evodn\u00edky:<\/strong> Pou\u017e\u00edvaj\u00ed se pro generov\u00e1n\u00ed ultrazvuku v \u0161irok\u00e9m paprsku.<\/li>\n
  • Zaost\u0159ovac\u00ed p\u0159evodn\u00edky:<\/strong> Koncentruj\u00ed ultrazvuk do \u00fazk\u00e9ho paprsku, \u010d\u00edm\u017e zvy\u0161uj\u00ed intenzitu.<\/li>\n
  • Lin\u00e1rn\u00ed pole p\u0159evodn\u00edky:<\/strong> Skl\u00e1daj\u00ed se z \u0159ady jednotliv\u00fdch prvk\u016f, kter\u00e9 umo\u017e\u0148uj\u00ed skenov\u00e1n\u00ed a tvorbu obraz\u016f.<\/li>\n<\/ul>\n

    Aplikace ultrazvukov\u00fdch vln<\/p>\n

    Ultrazvukov\u00e9 vlny nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech, nap\u0159\u00edklad:<\/p>\n

      \n
    • L\u00e9ka\u0159stv\u00ed:<\/strong> Ultrasonografie, ultrazvukov\u00e1 terapie.<\/li>\n
    • Pr\u016fmysl:<\/strong> Ultrazvukov\u00e9 \u010di\u0161t\u011bn\u00ed, sva\u0159ov\u00e1n\u00ed, m\u011b\u0159en\u00ed tlou\u0161\u0165ky materi\u00e1l\u016f.<\/li>\n
    • Spot\u0159ebn\u00ed elektronika:<\/strong> Ultrazvukov\u00e9 d\u00e1lkov\u00e9 ovlada\u010de, senzory.<\/li>\n<\/ul>\n

      Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee generov\u00e1n\u00ed ultrazvukov\u00fdch vln je zalo\u017eeno na piezoelektrick\u00e9m jevu a umo\u017e\u0148uje \u0161irokou \u0161k\u00e1lu aplikac\u00ed v r\u016fzn\u00fdch oblastech. V\u00fdb\u011br vhodn\u00e9ho typu p\u0159evodn\u00edku a jeho parametr\u016f je kl\u00ed\u010dov\u00fd pro dosa\u017een\u00ed po\u017eadovan\u00fdch v\u00fdsledk\u016f. D\u016fkladn\u00e9 pochopen\u00ed princip\u016f generov\u00e1n\u00ed ultrazvukov\u00fdch vln je nezbytn\u00e9 pro efektivn\u00ed vyu\u017eit\u00ed t\u00e9to technologie.<\/p>\n","protected":false},"excerpt":{"rendered":"

      Ultrazvukov\u00e9 vlny nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech, od l\u00e9ka\u0159stv\u00ed p\u0159es pr\u016fmysl a\u017e po spot\u0159ebn\u00ed elektroniku. Pochopen\u00ed princip\u016f jejich generov\u00e1n\u00ed je kl\u00ed\u010dov\u00e9 pro pochopen\u00ed jejich funk\u010dnosti a aplikac\u00ed. Tento \u010dl\u00e1nek se podrobn\u011b zam\u011b\u0159\u00ed na to, jak se ultrazvukov\u00e9 vlny vytv\u00e1\u0159ej\u00ed. Piezoelektrick\u00fd jev a jeho vyu\u017eit\u00ed Z\u00e1kladn\u00edm principem generov\u00e1n\u00ed ultrazvukov\u00fdch vln je piezoelektrick\u00fd jev. Tento jev<\/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-57786","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\/57786","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=57786"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57786\/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=57786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=57786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=57786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}