{"id":57606,"date":"2023-04-22T03:04:58","date_gmt":"2023-04-22T08:04:58","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-detect-ultrasonic-sound\/"},"modified":"2025-01-27T06:08:11","modified_gmt":"2025-01-27T11:08:11","slug":"how-to-detect-ultrasonic-sound","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-detect-ultrasonic-sound\/","title":{"rendered":"Detekce ultrazvuku: metody a praktick\u00e9 postupy"},"content":{"rendered":"

Ultrazvuk, zvuk s frekvenc\u00ed nad 20 kHz, je pro lidsk\u00e9 ucho nesly\u0161iteln\u00fd, ale jeho detekce je kl\u00ed\u010dov\u00e1 v mnoha oblastech, od l\u00e9ka\u0159stv\u00ed po pr\u016fmysl. Jeho detekce vy\u017eaduje speci\u00e1ln\u00ed techniky a za\u0159\u00edzen\u00ed, kter\u00e9 dok\u00e1\u017e\u00ed p\u0159ev\u00e9st tyto vysokofrekven\u010dn\u00ed vibrace na pro n\u00e1s znateln\u00fd sign\u00e1l. Tento \u010dl\u00e1nek se bude zab\u00fdvat r\u016fzn\u00fdmi metodami detekce ultrazvuku.<\/p>\n

Metody detekce ultrazvuku<\/h3>\n

Existuje n\u011bkolik metod, jak detekovat ultrazvuk. Nejb\u011b\u017en\u011bj\u0161\u00ed metodou je pou\u017eit\u00ed ultrazvukov\u00e9ho mikrofonu (hydrofonu v p\u0159\u00edpad\u011b detekce ve vod\u011b), kter\u00fd p\u0159ev\u00e1d\u00ed mechanick\u00e9 vibrace ultrazvuku na elektrick\u00fd sign\u00e1l. Tyto mikrofony jsou zalo\u017eeny na piezoelektrick\u00e9m jevu, kdy se p\u0159i deformaci piezoelektrick\u00e9ho krystalu vytv\u00e1\u0159\u00ed elektrick\u00e9 nap\u011bt\u00ed. Citlivost t\u011bchto mikrofon\u016f se li\u0161\u00ed v z\u00e1vislosti na pou\u017eit\u00e9m materi\u00e1lu a konstrukci.<\/p>\n\n\n\n\n\n\n\n
Typ mikrofonu<\/th>\nFrekven\u010dn\u00ed rozsah (kHz)<\/th>\nCitlivost (mV\/Pa)<\/th>\nAplikace<\/th>\n<\/tr>\n<\/thead>\n
Keramick\u00fd<\/td>\n20 – 100<\/td>\n10 – 100<\/td>\nPr\u016fmyslov\u00e1 kontrola, l\u00e9ka\u0159sk\u00e1 diagnostika<\/td>\n<\/tr>\n
Polymern\u00ed f\u00f3lie<\/td>\n100 – 1000<\/td>\n1 – 10<\/td>\nBiomedic\u00ednsk\u00fd v\u00fdzkum, ultrazvukov\u00e1 nedestruktivn\u00ed zkou\u0161en\u00ed<\/td>\n<\/tr>\n
Kapacitn\u00ed<\/td>\n10 – 1000<\/td>\n0.1 – 1<\/td>\nM\u011b\u0159en\u00ed akustick\u00e9ho tlaku<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Dal\u0161\u00ed metodou je vyu\u017eit\u00ed interferometrie, kter\u00e1 m\u011b\u0159\u00ed zm\u011bny v d\u00e9lce optick\u00e9ho vl\u00e1kna zp\u016fsoben\u00e9 ultrazvukov\u00fdmi vibracemi. Tato metoda je vysoce citliv\u00e1 a umo\u017e\u0148uje detekci i velmi slab\u00fdch ultrazvukov\u00fdch sign\u00e1l\u016f. Nicm\u00e9n\u011b je dra\u017e\u0161\u00ed a technicky n\u00e1ro\u010dn\u011bj\u0161\u00ed na implementaci ne\u017e pou\u017eit\u00ed mikrofon\u016f.<\/p>\n

Zpracov\u00e1n\u00ed detekovan\u00e9ho sign\u00e1lu<\/h3>\n

Detek\u010dn\u00ed za\u0159\u00edzen\u00ed obvykle generuje analogov\u00fd sign\u00e1l, kter\u00fd je nutn\u00e9 p\u0159ev\u00e9st na digit\u00e1ln\u00ed form\u00e1t pro dal\u0161\u00ed zpracov\u00e1n\u00ed. Toto zpracov\u00e1n\u00ed zahrnuje amplifikaci, filtrov\u00e1n\u00ed a anal\u00fdzu sign\u00e1lu. Filtrace je d\u016fle\u017eit\u00e1 pro eliminaci ne\u017e\u00e1douc\u00edho \u0161umu a zv\u00fdrazn\u011bn\u00ed ultrazvukov\u00e9ho sign\u00e1lu. Anal\u00fdza m\u016f\u017ee zahrnovat m\u011b\u0159en\u00ed frekvence, amplitudy a \u010dasov\u00e9ho pr\u016fb\u011bhu sign\u00e1lu. Pro sofistikovan\u011bj\u0161\u00ed anal\u00fdzu se pou\u017e\u00edvaj\u00ed metody digit\u00e1ln\u00edho zpracov\u00e1n\u00ed sign\u00e1l\u016f (DSP).<\/p>\n

Aplikace detekce ultrazvuku<\/h3>\n

Detekce ultrazvuku m\u00e1 \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oblastech. V l\u00e9ka\u0159stv\u00ed se vyu\u017e\u00edv\u00e1 k diagnostice (ultrazvukov\u00e9 vy\u0161et\u0159en\u00ed) a terapii (ultrazvukov\u00e9 o\u0161et\u0159en\u00ed). V pr\u016fmyslu se pou\u017e\u00edv\u00e1 k nedestruktivn\u00edmu zkou\u0161en\u00ed materi\u00e1l\u016f, m\u011b\u0159en\u00ed vzd\u00e1lenosti a detekci \u00fanik\u016f. V oblasti ekologie slou\u017e\u00ed k monitoringu mo\u0159sk\u00fdch \u017eivo\u010dich\u016f.<\/p>\n

V\u00fdb\u011br vhodn\u00e9 metody<\/h3>\n

V\u00fdb\u011br vhodn\u00e9 metody detekce ultrazvuku z\u00e1vis\u00ed na specifick\u00fdch po\u017eadavc\u00edch aplikace. P\u0159i volb\u011b je pot\u0159eba zv\u00e1\u017eit po\u017eadovan\u00fd frekven\u010dn\u00ed rozsah, citlivost, rozli\u0161en\u00ed, cena a dostupnost za\u0159\u00edzen\u00ed. V n\u011bkter\u00fdch p\u0159\u00edpadech m\u016f\u017ee b\u00fdt nutn\u00e9 kombinovat v\u00edce metod pro dosa\u017een\u00ed optim\u00e1ln\u00edch v\u00fdsledk\u016f.<\/p>\n

Ultrazvuk, i kdy\u017e lidsk\u00fdm uchem nesly\u0161iteln\u00fd, p\u0159edstavuje d\u016fle\u017eit\u00fd zdroj informac\u00ed v mnoha oblastech. Spr\u00e1vn\u00fd v\u00fdb\u011br a pou\u017eit\u00ed detek\u010dn\u00edch metod n\u00e1m umo\u017e\u0148uje efektivn\u011b vyu\u017e\u00edt jeho potenci\u00e1l. Rozvoj technologi\u00ed v t\u00e9to oblasti neust\u00e1le pokra\u010duje a p\u0159in\u00e1\u0161\u00ed nov\u00e9 mo\u017enosti a vylep\u0161en\u00ed st\u00e1vaj\u00edc\u00edch metod detekce ultrazvuku.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ultrazvuk, zvuk s frekvenc\u00ed nad 20 kHz, je pro lidsk\u00e9 ucho nesly\u0161iteln\u00fd, ale jeho detekce je kl\u00ed\u010dov\u00e1 v mnoha oblastech, od l\u00e9ka\u0159stv\u00ed po pr\u016fmysl. Jeho detekce vy\u017eaduje speci\u00e1ln\u00ed techniky a za\u0159\u00edzen\u00ed, kter\u00e9 dok\u00e1\u017e\u00ed p\u0159ev\u00e9st tyto vysokofrekven\u010dn\u00ed vibrace na pro n\u00e1s znateln\u00fd sign\u00e1l. Tento \u010dl\u00e1nek se bude zab\u00fdvat r\u016fzn\u00fdmi metodami detekce ultrazvuku. Metody detekce ultrazvuku 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-57606","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\/57606","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=57606"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57606\/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=57606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=57606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=57606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}