{"id":44212,"date":"2023-04-25T16:20:17","date_gmt":"2023-04-25T21:20:17","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-a-piezo-transducer\/"},"modified":"2025-01-21T07:28:17","modified_gmt":"2025-01-21T12:28:17","slug":"what-is-a-piezo-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-a-piezo-transducer\/","title":{"rendered":"Hi\u1ec3u r\u00f5 v\u1ec1 c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n (Piezo)"},"content":{"rendered":"

\u00c1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1eb7c bi\u1ec7t: ch\u00fang c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc (nh\u01b0 \u00e1p l\u1ef1c, rung \u0111\u1ed9ng) th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Hi\u1ec7u \u1ee9ng n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, cho ph\u00e9p ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t lo\u1ea1t c\u00e1c \u1ee9ng d\u1ee5ng t\u1eeb c\u1ea3m bi\u1ebfn \u0111\u1ebfn b\u1ed9 truy\u1ec1n \u0111\u1ed9ng. V\u1eady ch\u00ednh x\u00e1c piezo transducer l\u00e0 g\u00ec v\u00e0 ch\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n<\/h3>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n x\u1ea3y ra do c\u1ea5u tr\u00fac tinh th\u1ec3 \u0111\u1eb7c bi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n. Khi v\u1eadt li\u1ec7u n\u00e0y b\u1ecb n\u00e9n ho\u1eb7c k\u00e9o gi\u00e3n, s\u1ef1 ph\u00e2n b\u1ed1 \u0111i\u1ec7n t\u00edch b\u00ean trong tinh th\u1ec3 thay \u0111\u1ed5i, t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. Ng\u01b0\u1ee3c l\u1ea1i, khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p v\u00e0o v\u1eadt li\u1ec7u, n\u00f3 s\u1ebd thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng, co l\u1ea1i ho\u1eb7c gi\u00e3n n\u1edf t\u00f9y thu\u1ed9c v\u00e0o c\u1ef1c c\u1ee7a \u0111i\u1ec7n \u00e1p.<\/p>\n

V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/h3>\n

C\u00f3 nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, bao g\u1ed3m c\u1ea3 g\u1ed1m (nh\u01b0 PZT – ch\u00ec zirconat titanat), tinh th\u1ec3 (nh\u01b0 th\u1ea1ch anh), v\u00e0 polymer (nh\u01b0 PVDF). M\u1ed7i lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 nh\u1eefng \u0111\u1eb7c t\u00ednh ri\u00eang, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. V\u00ed d\u1ee5, g\u1ed1m PZT c\u00f3 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n m\u1ea1nh, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi hi\u1ec7u su\u1ea5t cao.<\/p>\n

C\u00e1c lo\u1ea1i piezo transducer<\/h3>\n

Piezo transducer \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i ch\u00ednh: c\u1ea3m bi\u1ebfn v\u00e0 b\u1ed9 truy\u1ec1n \u0111\u1ed9ng.<\/p>\n\n\n\n\n\n\n
Lo\u1ea1i<\/th>\nCh\u1ee9c n\u0103ng<\/th>\n\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
C\u1ea3m bi\u1ebfn<\/td>\nChuy\u1ec3n \u0111\u1ed5i \u00e1p l\u1ef1c\/rung \u0111\u1ed9ng th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n<\/td>\nMicr\u00f4, c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t, c\u1ea3m bi\u1ebfn gia t\u1ed1c<\/td>\n<\/tr>\n
B\u1ed9 truy\u1ec1n \u0111\u1ed9ng<\/td>\nChuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh chuy\u1ec3n \u0111\u1ed9ng c\u01a1 h\u1ecdc<\/td>\nLoa, m\u00e1y in phun m\u1ef1c, thi\u1ebft b\u1ecb t\u1ea1o s\u00f3ng si\u00eau \u00e2m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ee8ng d\u1ee5ng c\u1ee7a piezo transducer<\/h3>\n

Piezo transducer \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y \u0111\u1ebfn c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p chuy\u00ean d\u1ee5ng. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n

    \n
  • Y t\u1ebf:<\/strong> M\u00e1y si\u00eau \u00e2m ch\u1ea9n \u0111o\u00e1n, thi\u1ebft b\u1ecb theo d\u00f5i nh\u1ecbp tim.<\/li>\n
  • C\u00f4ng nghi\u1ec7p:<\/strong> C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t, c\u1ea3m bi\u1ebfn rung \u0111\u1ed9ng, ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y.<\/li>\n
  • \u0110\u1eddi s\u1ed1ng:<\/strong> Loa, b\u1eadt l\u1eeda, \u0111\u1ed3ng h\u1ed3 th\u1ea1ch anh.<\/li>\n
  • \u00d4 t\u00f4:<\/strong> C\u1ea3m bi\u1ebfn t\u00fai kh\u00ed, c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t l\u1ed1p.<\/li>\n<\/ul>\n

    Piezo transducer trong s\u00f3ng si\u00eau \u00e2m<\/h3>\n

    Trong l\u0129nh v\u1ef1c s\u00f3ng si\u00eau \u00e2m, piezo transducer \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ea1o ra v\u00e0 ph\u00e1t hi\u1ec7n s\u00f3ng si\u00eau \u00e2m. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb l\u00e0m s\u1ea1ch b\u1eb1ng si\u00eau \u00e2m, h\u00e0n si\u00eau \u00e2m, v\u00e0 ki\u1ec3m tra v\u1eadt li\u1ec7u b\u1eb1ng si\u00eau \u00e2m. <\/p>\n

    T\u00f3m l\u1ea1i, piezo transducer l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng nh\u1edd kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng gi\u1eefa d\u1ea1ng c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n. S\u1ef1 \u0111a d\u1ea1ng v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 thi\u1ebft k\u1ebf cho ph\u00e9p ch\u00fang \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u kh\u00e1c nhau, t\u1eeb c\u1ea3m bi\u1ebfn nh\u1ea1y c\u1ea3m \u0111\u1ebfn b\u1ed9 truy\u1ec1n \u0111\u1ed9ng m\u1ea1nh m\u1ebd, g\u00f3p ph\u1ea7n kh\u00f4ng nh\u1ecf v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i.<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u00c1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1eb7c bi\u1ec7t: ch\u00fang c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc (nh\u01b0 \u00e1p l\u1ef1c, rung \u0111\u1ed9ng) th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Hi\u1ec7u \u1ee9ng n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, cho ph\u00e9p ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t lo\u1ea1t c\u00e1c \u1ee9ng d\u1ee5ng<\/p>\n","protected":false},"author":1,"featured_media":19411,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-44212","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\/44212","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=44212"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44212\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/19411"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=44212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}