{"id":58071,"date":"2023-04-22T01:51:25","date_gmt":"2023-04-22T06:51:25","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-use-ultrasonic-transducer\/"},"modified":"2025-01-27T06:14:02","modified_gmt":"2025-01-27T11:14:02","slug":"how-to-use-ultrasonic-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-use-ultrasonic-transducer\/","title":{"rendered":"Ultrazvukov\u00fd sn\u00edma\u010d: Praktick\u00fd n\u00e1vod k pou\u017eit\u00ed"},"content":{"rendered":"

Ultrazvukov\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oborech, od medic\u00edny a pr\u016fmyslov\u00e9 automatizace a\u017e po automobilov\u00fd pr\u016fmysl a v\u011bdeck\u00fd v\u00fdzkum. Spr\u00e1vn\u00e9 pou\u017eit\u00ed t\u011bchto sn\u00edma\u010d\u016f je kl\u00ed\u010dov\u00e9 pro dosa\u017een\u00ed p\u0159esn\u00fdch a spolehliv\u00fdch v\u00fdsledk\u016f. Tento \u010dl\u00e1nek podrobn\u011b popisuje, jak s ultrazvukov\u00fdmi sn\u00edma\u010di pracovat.<\/p>\n

Princip fungov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de<\/h3>\n

Ultrazvukov\u00e9 sn\u00edma\u010de, tak\u00e9 zn\u00e1m\u00e9 jako piezoelektrick\u00e9 sn\u00edma\u010de, pracuj\u00ed na principu piezoelektrick\u00e9ho jevu. Tento jev spo\u010d\u00edv\u00e1 ve vz\u00e1jemn\u00e9 konverzi mechanick\u00e9 energie (tlaku) a elektrick\u00e9 energie. Kdy\u017e se na piezoelektrick\u00fd krystal aplikuje elektrick\u00e9 nap\u011bt\u00ed, krystal se mechanicky deformuje a vyza\u0159uje ultrazvukov\u00e9 vlny. Naopak, kdy\u017e se na krystal aplikuje mechanick\u00fd tlak (nap\u0159. odra\u017een\u00e9 ultrazvukov\u00e9 vlny), generuje elektrick\u00fd sign\u00e1l. Frekvence vyza\u0159ovan\u00fdch vln je typicky v rozsahu od 20 kHz do n\u011bkolika MHz. Parametry jako frekvence, intenzita a tvar vys\u00edlan\u00e9ho sign\u00e1lu se li\u0161\u00ed v z\u00e1vislosti na aplikaci a typu sn\u00edma\u010de.<\/p>\n

Volba spr\u00e1vn\u00e9ho sn\u00edma\u010de<\/h3>\n

V\u00fdb\u011br vhodn\u00e9ho ultrazvukov\u00e9ho sn\u00edma\u010de z\u00e1vis\u00ed na n\u011bkolika faktorech, v\u010detn\u011b po\u017eadovan\u00e9 frekvence, dosahu, materi\u00e1lu m\u011b\u0159en\u00e9ho objektu a prost\u0159ed\u00ed. N\u00e1sleduj\u00edc\u00ed tabulka shrnuje n\u011bkter\u00e9 kl\u00ed\u010dov\u00e9 parametry:<\/p>\n\n\n\n\n\n\n\n\n\n
Parametr<\/th>\nJednotka<\/th>\nTypick\u00e9 hodnoty<\/th>\n<\/tr>\n<\/thead>\n
Frekvence<\/td>\nMHz<\/td>\n0.5 – 10 MHz<\/td>\n<\/tr>\n
Dosah<\/td>\ncm<\/td>\n1 – 100 cm (z\u00e1vis\u00ed na frekvenci a prost\u0159ed\u00ed)<\/td>\n<\/tr>\n
Citlivost<\/td>\nV\/Pa<\/td>\nVariabiln\u00ed, z\u00e1vis\u00ed na konstrukci sn\u00edma\u010de<\/td>\n<\/tr>\n
Typ p\u0159ipojen\u00ed<\/td>\n<\/td>\nAnalogov\u00e9, digit\u00e1ln\u00ed (nap\u0159. I2C, SPI)<\/td>\n<\/tr>\n
Materi\u00e1l krystalu<\/td>\n<\/td>\nKeramika (nap\u0159. PZT), kompozitn\u00ed materi\u00e1ly<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

P\u0159ipojen\u00ed a nap\u00e1jen\u00ed sn\u00edma\u010de<\/h3>\n

Zp\u016fsob p\u0159ipojen\u00ed a nap\u00e1jen\u00ed sn\u00edma\u010de z\u00e1vis\u00ed na jeho typu a specifikac\u00edch. V\u011bt\u0161ina sn\u00edma\u010d\u016f vy\u017eaduje specifick\u00e9 nap\u00e1jec\u00ed nap\u011bt\u00ed a proud. Je d\u016fle\u017eit\u00e9 dodr\u017eovat v\u00fdrobcem doporu\u010den\u00e9 parametry, aby se p\u0159ede\u0161lo po\u0161kozen\u00ed sn\u00edma\u010de. Mnoho sn\u00edma\u010d\u016f vy\u017eaduje i spr\u00e1vn\u00e9 uzemn\u011bn\u00ed pro minimalizaci \u0161umu. Pro digit\u00e1ln\u00ed sn\u00edma\u010de je nutn\u00e9 dodr\u017eet komunika\u010dn\u00ed protokol (nap\u0159. I2C, SPI).<\/p>\n

Kalibrace a ov\u011b\u0159en\u00ed<\/h3>\n

P\u0159ed pou\u017eit\u00edm je vhodn\u00e9 ultrazvukov\u00fd sn\u00edma\u010d zkalibrovat. Kalibrace m\u016f\u017ee zahrnovat m\u011b\u0159en\u00ed v referen\u010dn\u00edm prost\u0159ed\u00ed s zn\u00e1m\u00fdmi vlastnostmi, aby se ov\u011b\u0159ila p\u0159esnost m\u011b\u0159en\u00ed. Pravideln\u00e1 kalibrace je d\u016fle\u017eit\u00e1 pro udr\u017een\u00ed p\u0159esnosti m\u011b\u0159en\u00ed v pr\u016fb\u011bhu \u010dasu. V z\u00e1vislosti na aplikaci a po\u017eadovan\u00e9 p\u0159esnosti se kalibrace prov\u00e1d\u00ed s r\u016fznou frekvenc\u00ed.<\/p>\n

Aplika\u010dn\u00ed p\u0159\u00edklady<\/h3>\n

Ultrazvukov\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech. Mezi b\u011b\u017en\u00e9 aplikace pat\u0159\u00ed m\u011b\u0159en\u00ed vzd\u00e1lenosti, detekce objekt\u016f, m\u011b\u0159en\u00ed hladiny kapaliny, ultrazvukov\u00e1 diagnostika v medic\u00edn\u011b, a mnoho dal\u0161\u00edch. V pr\u016fmyslu se nap\u0159\u00edklad pou\u017e\u00edvaj\u00ed pro kontrolu kvality v\u00fdrobk\u016f, detekci vad a automatizaci proces\u016f. <\/p>\n

Bezpe\u010dnostn\u00ed opat\u0159en\u00ed<\/h3>\n

P\u0159i pr\u00e1ci s ultrazvukov\u00fdmi sn\u00edma\u010di je nutn\u00e9 dodr\u017eovat bezpe\u010dnostn\u00ed opat\u0159en\u00ed. Intenzivn\u00ed ultrazvuk m\u016f\u017ee po\u0161kodit sluch, proto je vhodn\u00e9 pou\u017e\u00edvat ochrann\u00e9 pom\u016fcky, jako jsou chr\u00e1ni\u010de sluchu, zvl\u00e1\u0161t\u011b p\u0159i pr\u00e1ci s vysoce v\u00fdkonn\u00fdmi sn\u00edma\u010di. Je tak\u00e9 d\u016fle\u017eit\u00e9 db\u00e1t na spr\u00e1vn\u00e9 uzemn\u011bn\u00ed a manipulaci se sn\u00edma\u010dem, aby se p\u0159ede\u0161lo \u00farazu elektrick\u00fdm proudem.<\/p>\n

Spr\u00e1vn\u00e9 pou\u017e\u00edv\u00e1n\u00ed ultrazvukov\u00fdch sn\u00edma\u010d\u016f vy\u017eaduje pochopen\u00ed jejich principu fungov\u00e1n\u00ed a parametr\u016f. Dodr\u017eov\u00e1n\u00ed spr\u00e1vn\u00fdch postup\u016f p\u0159i v\u00fdb\u011bru, p\u0159ipojen\u00ed, kalibraci a pou\u017e\u00edv\u00e1n\u00ed sn\u00edma\u010d\u016f zajist\u00ed spolehliv\u00e9 a p\u0159esn\u00e9 m\u011b\u0159en\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ultrazvukov\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v mnoha oborech, od medic\u00edny a pr\u016fmyslov\u00e9 automatizace a\u017e po automobilov\u00fd pr\u016fmysl a v\u011bdeck\u00fd v\u00fdzkum. Spr\u00e1vn\u00e9 pou\u017eit\u00ed t\u011bchto sn\u00edma\u010d\u016f je kl\u00ed\u010dov\u00e9 pro dosa\u017een\u00ed p\u0159esn\u00fdch a spolehliv\u00fdch v\u00fdsledk\u016f. Tento \u010dl\u00e1nek podrobn\u011b popisuje, jak s ultrazvukov\u00fdmi sn\u00edma\u010di pracovat. Princip fungov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de Ultrazvukov\u00e9 sn\u00edma\u010de, tak\u00e9 zn\u00e1m\u00e9 jako piezoelektrick\u00e9 sn\u00edma\u010de, pracuj\u00ed na principu<\/p>\n","protected":false},"author":1,"featured_media":19416,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-58071","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\/58071","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=58071"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/58071\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19416"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=58071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=58071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=58071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}