{"id":45636,"date":"2023-04-22T02:01:37","date_gmt":"2023-04-22T07:01:37","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-ultrasonic-waves-are-generated\/"},"modified":"2025-01-21T07:24:54","modified_gmt":"2025-01-21T12:24:54","slug":"how-ultrasonic-waves-are-generated","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-ultrasonic-waves-are-generated\/","title":{"rendered":"Kh\u00e1m ph\u00e1 nguy\u00ean l\u00fd t\u1ea1o s\u00f3ng si\u00eau \u00e2m"},"content":{"rendered":"

S\u00f3ng si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (tr\u00ean 20kHz), \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. S\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a ch\u00fang, tuy v\u00f4 h\u00ecnh v\u1edbi tai ng\u01b0\u1eddi, l\u1ea1i mang \u0111\u1ebfn nh\u1eefng \u1ee9ng d\u1ee5ng h\u1eefu \u00edch \u0111\u00e1ng kinh ng\u1ea1c. V\u1eady s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o t\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o ra lo\u1ea1i s\u00f3ng \u0111\u1eb7c bi\u1ec7t n\u00e0y.<\/p>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n v\u00e0 c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/h3>\n

M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m l\u00e0 s\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. Hi\u1ec7u \u1ee9ng n\u00e0y m\u00f4 t\u1ea3 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn d\u1ea1ng khi \u0111\u1eb7t d\u01b0\u1edbi \u0111i\u1ec7n tr\u01b0\u1eddng. C\u00e1c v\u1eadt li\u1ec7u th\u1ec3 hi\u1ec7n t\u00ednh ch\u1ea5t n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n. M\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng bao g\u1ed3m th\u1ea1ch anh, g\u1ed1m \u00e1p \u0111i\u1ec7n (nh\u01b0 PZT – ch\u00ec zirconat titanat) v\u00e0 c\u00e1c polyme \u0111\u1eb7c bi\u1ec7t.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m<\/h3>\n

B\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m, l\u00e0 thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc d\u01b0\u1edbi d\u1ea1ng s\u00f3ng si\u00eau \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Khi m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u v\u1edbi t\u1ea7n s\u1ed1 si\u00eau \u00e2m \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n trong b\u1ed9 chuy\u1ec3n \u0111\u1ed5i, v\u1eadt li\u1ec7u n\u00e0y s\u1ebd dao \u0111\u1ed9ng v\u1edbi c\u00f9ng t\u1ea7n s\u1ed1, t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p \u0111\u1eb7t v\u00e0o v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n.<\/p>\n

C\u00e1c lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m<\/h3>\n

C\u00f3 nhi\u1ec1u lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m kh\u00e1c nhau, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n\n\n\n\n\n\n\n
Lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i<\/th>\n\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n<\/td>\nS\u1eed d\u1ee5ng v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/td>\nKi\u1ec3m tra v\u1eadt li\u1ec7u, h\u00ecnh \u1ea3nh y t\u1ebf, l\u00e0m s\u1ea1ch si\u00eau \u00e2m<\/td>\n<\/tr>\n
B\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u1eeb gi\u1ea3o<\/td>\nS\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o<\/td>\n\u1ee8ng d\u1ee5ng c\u00f4ng su\u1ea5t cao, h\u00e0n si\u00eau \u00e2m<\/td>\n<\/tr>\n
B\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u0129nh \u0111i\u1ec7n<\/td>\nS\u1eed d\u1ee5ng l\u1ef1c t\u0129nh \u0111i\u1ec7n<\/td>\n\u1ee8ng d\u1ee5ng t\u1ea7n s\u1ed1 cao, nghi\u00ean c\u1ee9u khoa h\u1ecdc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i<\/h3>\n

Hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m:<\/p>\n

    \n
  • T\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng:<\/strong> T\u1ea7n s\u1ed1 m\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i dao \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/li>\n
  • B\u0103ng th\u00f4ng:<\/strong> Ph\u1ea1m vi t\u1ea7n s\u1ed1 m\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3.<\/li>\n
  • Hi\u1ec7u su\u1ea5t chuy\u1ec3n \u0111\u1ed5i:<\/strong> Kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n
  • V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n:<\/strong> \u0110\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i.<\/li>\n<\/ul>\n

    \u1ee8ng d\u1ee5ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m trong th\u1ef1c t\u1ebf<\/h3>\n

    S\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, t\u1eeb y t\u1ebf (ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh, \u0111i\u1ec1u tr\u1ecb), c\u00f4ng nghi\u1ec7p (ki\u1ec3m tra v\u1eadt li\u1ec7u, h\u00e0n, l\u00e0m s\u1ea1ch) \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y (c\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch).<\/p>\n

    T\u00f3m l\u1ea1i, vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m ch\u1ee7 y\u1ebfu d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n v\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 v\u1eadt li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt ch\u1ebf t\u1ea1o \u0111\u00e3 cho ph\u00e9p t\u1ea1o ra c\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m v\u1edbi hi\u1ec7u su\u1ea5t cao, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng \u0111a d\u1ea1ng c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. S\u00f3ng si\u00eau \u00e2m, v\u1edbi nh\u1eefng \u0111\u1eb7c t\u00ednh \u0111\u1ed9c \u0111\u00e1o, h\u1ee9a h\u1eb9n s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u00f3ng g\u00f3p v\u00e0o s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"

    S\u00f3ng si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (tr\u00ean 20kHz), \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. S\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a ch\u00fang, tuy v\u00f4 h\u00ecnh v\u1edbi tai ng\u01b0\u1eddi, l\u1ea1i mang \u0111\u1ebfn nh\u1eefng \u1ee9ng d\u1ee5ng h\u1eefu<\/p>\n","protected":false},"author":1,"featured_media":26473,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-45636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/45636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=45636"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/45636\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26473"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=45636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=45636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=45636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}