{"id":57781,"date":"2023-04-22T02:57:19","date_gmt":"2023-04-22T07:57:19","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-ultrasonic-sound\/"},"modified":"2025-01-27T06:11:30","modified_gmt":"2025-01-27T11:11:30","slug":"how-to-make-ultrasonic-sound","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-make-ultrasonic-sound\/","title":{"rendered":"Generov\u00e1n\u00ed ultrazvuku: Praktick\u00fd n\u00e1vod"},"content":{"rendered":"

Ultrazvuk, 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. Jeho generov\u00e1n\u00ed je fascinuj\u00edc\u00ed proces, kter\u00fd spojuje fyziku a elektroniku. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody v\u00fdroby ultrazvuku a na principy, na kter\u00fdch funguj\u00ed.<\/p>\n

Generov\u00e1n\u00ed ultrazvuku piezoelektrick\u00fdm efektem<\/h3>\n

Nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00ed metodou generov\u00e1n\u00ed ultrazvuku je vyu\u017eit\u00ed piezoelektrick\u00e9ho efektu. Piezoelektrick\u00e9 materi\u00e1ly, jako je k\u0159emen nebo n\u011bkter\u00e9 keramick\u00e9 materi\u00e1ly (nap\u0159. titan\u00e1t barnat\u00fd), m\u011bn\u00ed sv\u016fj tvar v z\u00e1vislosti na aplikovan\u00e9m elektrick\u00e9m poli a naopak. Kmit\u00e1n\u00ed piezoelektrick\u00e9ho krystalu, generovan\u00e9 rychl\u00fdmi zm\u011bnami nap\u011bt\u00ed, vytv\u00e1\u0159\u00ed mechanick\u00e9 vibrace o vysok\u00e9 frekvenci, kter\u00e9 se \u0161\u00ed\u0159\u00ed do okoln\u00edho prost\u0159ed\u00ed jako ultrazvuk. Frekvence ultrazvuku z\u00e1vis\u00ed na vlastnostech materi\u00e1lu a jeho geometrick\u00fdch rozm\u011brech.<\/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 – 100<\/td>\nVysok\u00e1 stabilita frekvence, odolnost<\/td>\nN\u00edzk\u00e1 \u00fa\u010dinnost, k\u0159ehkost<\/td>\n<\/tr>\n
Titan\u00e1t barnat\u00fd<\/td>\n100 – 1000<\/td>\nVysok\u00e1 \u00fa\u010dinnost, snadn\u00e1 v\u00fdroba<\/td>\nNi\u017e\u0161\u00ed stabilita frekvence, citlivost na teplotu<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Generov\u00e1n\u00ed ultrazvuku magnetostrikc\u00ed<\/h3>\n

Magnetostrik\u010dn\u00ed metoda vyu\u017e\u00edv\u00e1 materi\u00e1ly, jejich\u017e rozm\u011bry se m\u011bn\u00ed v z\u00e1vislosti na magnetick\u00e9m poli. Rychl\u00e9 zm\u011bny magnetick\u00e9ho pole, indukovan\u00e9 pomoc\u00ed st\u0159\u00eddav\u00e9ho proudu, zp\u016fsobuj\u00ed kmit\u00e1n\u00ed magnetostrik\u010dn\u00edho materi\u00e1lu, a t\u00edm generuj\u00ed ultrazvuk. Tato metoda je obvykle m\u00e9n\u011b \u00fa\u010dinn\u00e1 ne\u017e piezoelektrick\u00e1, ale m\u016f\u017ee b\u00fdt pou\u017eita pro generov\u00e1n\u00ed ultrazvuku o vy\u0161\u0161\u00edm v\u00fdkonu.<\/p>\n

Generov\u00e1n\u00ed ultrazvuku pomoc\u00ed zvukov\u00fdch p\u00ed\u0161\u0165al<\/h3>\n

Zvukov\u00e9 p\u00ed\u0161\u0165aly, vyu\u017e\u00edvaj\u00edc\u00ed principu proud\u011bn\u00ed stla\u010den\u00e9ho vzduchu, mohou generovat ultrazvukov\u00e9 vlny v ur\u010dit\u00fdch frekven\u010dn\u00edch rozsaz\u00edch. Princip spo\u010d\u00edv\u00e1 v rychl\u00e9m st\u0159\u00edd\u00e1n\u00ed tlaku vzduchu v p\u00ed\u0161\u0165ale, kter\u00e9 vytv\u00e1\u0159\u00ed tlakov\u00e9 vlny. Tento zp\u016fsob je vhodn\u00fd pro generov\u00e1n\u00ed ultrazvuku o ni\u017e\u0161\u00ed frekvenci a ni\u017e\u0161\u00edm v\u00fdkonu.<\/p>\n

Aplikace ultrazvuku<\/h3>\n

Ultrazvuk m\u00e1 \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech, v\u010detn\u011b l\u00e9ka\u0159stv\u00ed (ultrazvukov\u00e9 zobrazov\u00e1n\u00ed, ultrazvukov\u00e1 terapie), pr\u016fmyslu (ultrazvukov\u00e9 \u010di\u0161t\u011bn\u00ed, ultrazvukov\u00e9 sva\u0159ov\u00e1n\u00ed, defektoskopie), a dal\u0161\u00edch oborech. P\u0159esn\u00e1 frekvence a intenzita ultrazvuku z\u00e1vis\u00ed na po\u017eadovan\u00e9 aplikaci. Nap\u0159\u00edklad pro l\u00e9ka\u0159sk\u00e9 zobrazov\u00e1n\u00ed se pou\u017e\u00edvaj\u00ed ni\u017e\u0161\u00ed frekvence a ni\u017e\u0161\u00ed intenzita, zat\u00edmco pro ultrazvukov\u00e9 \u010di\u0161t\u011bn\u00ed se pou\u017e\u00edvaj\u00ed vy\u0161\u0161\u00ed frekvence a vy\u0161\u0161\u00ed intenzita.<\/p>\n

Ultrazvuk je fascinuj\u00edc\u00ed oblast fyziky s mnoha praktick\u00fdmi aplikacemi. Znalost r\u016fzn\u00fdch metod jeho generov\u00e1n\u00ed a vlastnost\u00ed pou\u017eit\u00fdch materi\u00e1l\u016f je kl\u00ed\u010dov\u00e1 pro jeho efektivn\u00ed vyu\u017eit\u00ed v r\u016fzn\u00fdch oblastech lidsk\u00e9 \u010dinnosti. V\u00fdb\u011br vhodn\u00e9 metody z\u00e1vis\u00ed na po\u017eadovan\u00e9 frekvenci, v\u00fdkonu a dal\u0161\u00edch specifick\u00fdch parametrech aplikace.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ultrazvuk, 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. Jeho generov\u00e1n\u00ed je fascinuj\u00edc\u00ed proces, kter\u00fd spojuje fyziku a elektroniku. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody v\u00fdroby ultrazvuku a na principy, na kter\u00fdch funguj\u00ed. Generov\u00e1n\u00ed ultrazvuku piezoelektrick\u00fdm efektem Nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00ed metodou generov\u00e1n\u00ed ultrazvuku je vyu\u017eit\u00ed<\/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-57781","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\/57781","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=57781"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57781\/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=57781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=57781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=57781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}