{"id":59848,"date":"2023-04-21T23:07:13","date_gmt":"2023-04-22T04:07:13","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-an-ultrasound-transducer\/"},"modified":"2025-01-27T06:09:40","modified_gmt":"2025-01-27T11:09:40","slug":"how-to-make-an-ultrasound-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-make-an-ultrasound-transducer\/","title":{"rendered":"V\u00fdroba ultrazvukov\u00e9ho sn\u00edma\u010de: Podrobn\u00fd n\u00e1vod"},"content":{"rendered":"

V\u00fdroba ultrazvukov\u00e9ho sn\u00edma\u010de je komplexn\u00ed proces vy\u017eaduj\u00edc\u00ed hlubok\u00e9 znalosti z oblasti akustiky, elektrotechniky a materi\u00e1lov\u00fdch v\u011bd. Nejedn\u00e1 se o jednoduch\u00fd projekt, kter\u00fd by se dal realizovat v dom\u00e1c\u00edch podm\u00ednk\u00e1ch, ale sp\u00ed\u0161e o vysoce specializovanou \u010dinnost prov\u00e1d\u011bnou v laboratorn\u00edch podm\u00ednk\u00e1ch s vyu\u017eit\u00edm precizn\u00edch n\u00e1stroj\u016f a technologi\u00ed. Tento \u010dl\u00e1nek se pokus\u00ed poskytnout z\u00e1kladn\u00ed p\u0159ehled o procesu v\u00fdroby, p\u0159i\u010dem\u017e je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee \u00fapln\u00e1 reprodukce profesion\u00e1ln\u00edho ultrazvukov\u00e9ho sn\u00edma\u010de vy\u017eaduje rozs\u00e1hl\u00e9 zku\u0161enosti a specializovan\u00e9 vybaven\u00ed.<\/p>\n

Piezoelektrick\u00fd materi\u00e1l a jeho p\u0159\u00edprava<\/h3>\n

Z\u00e1kladn\u00edm komponentem ka\u017ed\u00e9ho ultrazvukov\u00e9ho sn\u00edma\u010de je piezoelektrick\u00fd materi\u00e1l, kter\u00fd p\u0159ev\u00e1d\u00ed elektrickou energii na mechanick\u00e9 vibrace (a naopak). Nej\u010dast\u011bji se pou\u017e\u00edv\u00e1 keramika, jako je nap\u0159\u00edklad titan\u00e1t zirkoni\u010ditan olovnat\u00fd (PZT). P\u0159\u00edprava piezoelektrick\u00e9ho prvku zahrnuje n\u011bkolik krok\u016f, v\u010detn\u011b lisov\u00e1n\u00ed, sintrov\u00e1n\u00ed a pokovov\u00e1n\u00ed. Lisov\u00e1n\u00ed tvaruje materi\u00e1l do po\u017eadovan\u00e9ho tvaru a rozm\u011br\u016f, sintrov\u00e1n\u00ed zaji\u0161\u0165uje pot\u0159ebnou hustotu a mechanickou pevnost a pokovov\u00e1n\u00ed vytv\u00e1\u0159\u00ed elektrick\u00e9 kontakty pro p\u0159ipojen\u00ed k elektronick\u00e9mu obvodu. Kvalita piezoelektrick\u00e9ho prvku m\u00e1 z\u00e1sadn\u00ed vliv na v\u00fdkon cel\u00e9ho sn\u00edma\u010de, proto je tento krok kritick\u00fd.<\/p>\n

Konstrukce a mont\u00e1\u017e sn\u00edma\u010de<\/h3>\n

Piezoelektrick\u00fd prvek je obvykle um\u00edst\u011bn v pouzdru, kter\u00e9 ho chr\u00e1n\u00ed p\u0159ed mechanick\u00fdm po\u0161kozen\u00edm a vn\u011bj\u0161\u00edmi vlivy. Pouzdro je typicky vyrobeno z kovu (nap\u0159. nerezov\u00e1 ocel) nebo speci\u00e1ln\u00edch polymer\u016f, kter\u00e9 zaji\u0161\u0165uj\u00ed akustickou impedanci co nejbl\u00ed\u017ee k impedanci tk\u00e1n\u011b, pro optimalizaci p\u0159enosu ultrazvukov\u00fdch vln. D\u016fle\u017eitou sou\u010d\u00e1st\u00ed konstrukce je i akustick\u00e9 \u010do\u010dky a tlumi\u010de, kter\u00e9 optimalizuj\u00ed fokusaci a tvar ultrazvukov\u00e9ho paprsku. Precizn\u00ed mont\u00e1\u017e v\u0161ech komponent je kl\u00ed\u010dov\u00e1 pro dosa\u017een\u00ed po\u017eadovan\u00fdch parametr\u016f sn\u00edma\u010de.<\/p>\n

Elektrick\u00e9 zapojen\u00ed a kalibrace<\/h3>\n

Po mechanick\u00e9 mont\u00e1\u017ei je nutn\u00e9 p\u0159ipojit piezoelektrick\u00fd prvek k elektrick\u00e9mu obvodu. Tento obvod zaji\u0161\u0165uje generov\u00e1n\u00ed a p\u0159ij\u00edm\u00e1n\u00ed elektrick\u00fdch sign\u00e1l\u016f, kter\u00e9 jsou p\u0159ev\u00e1d\u011bny na ultrazvukov\u00e9 vlny a zp\u011bt. Zapojen\u00ed obvykle zahrnuje vysokonap\u011b\u0165ov\u00e9 zesilova\u010de, filtry a analogov\u011b-digit\u00e1ln\u00ed p\u0159evodn\u00edky. Po sestaven\u00ed je nutn\u00e9 sn\u00edma\u010d kalibrovat a otestovat jeho parametry, jako je frekven\u010dn\u00ed odezva, citlivost a rozli\u0161en\u00ed. Toto se prov\u00e1d\u00ed pomoc\u00ed speci\u00e1ln\u00edch testovac\u00edch za\u0159\u00edzen\u00ed.<\/p>\n

Materi\u00e1lov\u00e9 vlastnosti a jejich vliv na v\u00fdkon<\/h3>\n\n\n\n\n\n\n\n\n
Materi\u00e1l<\/th>\nAkustick\u00e1 impedance (MRayl)<\/th>\nDielektrick\u00e1 konstanta<\/th>\nTepeln\u00e1 vodivost (W\/mK)<\/th>\n<\/tr>\n<\/thead>\n
PZT<\/td>\n30 – 40<\/td>\n1000 – 2000<\/td>\n2 – 5<\/td>\n<\/tr>\n
Nerezov\u00e1 ocel<\/td>\n45<\/td>\n–<\/td>\n15<\/td>\n<\/tr>\n
Akrylov\u00e9 sklo<\/td>\n3.3<\/td>\n–<\/td>\n0.2<\/td>\n<\/tr>\n
Voda<\/td>\n1.5<\/td>\n–<\/td>\n0.6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

V\u00fdb\u011br materi\u00e1l\u016f pro jednotliv\u00e9 komponenty sn\u00edma\u010de je kritick\u00fd pro jeho funk\u010dnost. Tabulka ukazuje p\u0159\u00edklady akustick\u00e9 impedance, dielektrick\u00e9 konstanty a tepeln\u00e9 vodivosti pro n\u011bkter\u00e9 b\u011b\u017en\u011b pou\u017e\u00edvan\u00e9 materi\u00e1ly. Dob\u0159e zvolen\u00e1 kombinace materi\u00e1l\u016f minimalizuje odrazy ultrazvukov\u00fdch vln na rozhran\u00edch a maximalizuje \u00fa\u010dinnost p\u0159enosu energie.<\/p>\n

Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee v\u00fdroba ultrazvukov\u00e9ho sn\u00edma\u010de je n\u00e1ro\u010dn\u00fd proces, kter\u00fd vy\u017eaduje speci\u00e1ln\u00ed vybaven\u00ed, znalosti a zku\u0161enosti. I kdy\u017e je mo\u017en\u00e9 pochopit z\u00e1kladn\u00ed principy a kroky, praktick\u00e1 realizace je n\u00e1ro\u010dn\u00e1 a je nejl\u00e9pe ponech\u00e1na na specializovan\u00fdch firm\u00e1ch. P\u0159esto\u017ee se v tomto \u010dl\u00e1nku neobjevila zm\u00ednka o konkr\u00e9tn\u00edch zna\u010dk\u00e1ch, je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee p\u0159esnost a kvalita jednotliv\u00fdch komponent\u016f jsou kl\u00ed\u010dov\u00e9 pro dosa\u017een\u00ed vysok\u00e9ho v\u00fdkonu ultrazvukov\u00e9ho sn\u00edma\u010de.<\/p>\n","protected":false},"excerpt":{"rendered":"

V\u00fdroba ultrazvukov\u00e9ho sn\u00edma\u010de je komplexn\u00ed proces vy\u017eaduj\u00edc\u00ed hlubok\u00e9 znalosti z oblasti akustiky, elektrotechniky a materi\u00e1lov\u00fdch v\u011bd. Nejedn\u00e1 se o jednoduch\u00fd projekt, kter\u00fd by se dal realizovat v dom\u00e1c\u00edch podm\u00ednk\u00e1ch, ale sp\u00ed\u0161e o vysoce specializovanou \u010dinnost prov\u00e1d\u011bnou v laboratorn\u00edch podm\u00ednk\u00e1ch s vyu\u017eit\u00edm precizn\u00edch n\u00e1stroj\u016f a technologi\u00ed. Tento \u010dl\u00e1nek se pokus\u00ed poskytnout z\u00e1kladn\u00ed p\u0159ehled o procesu v\u00fdroby,<\/p>\n","protected":false},"author":1,"featured_media":24653,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-59848","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\/59848","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=59848"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/59848\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/24653"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=59848"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=59848"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=59848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}