{"id":44508,"date":"2023-04-25T14:47:59","date_gmt":"2023-04-25T19:47:59","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-piezoelectric-transducers\/"},"modified":"2025-01-21T07:28:58","modified_gmt":"2025-01-21T12:28:58","slug":"what-is-piezoelectric-transducers","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-piezoelectric-transducers\/","title":{"rendered":"Hi\u1ec3u r\u00f5 v\u1ec1 V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n v\u00e0 \u1ee8ng d\u1ee5ng chuy\u1ec3n \u0111\u1ed5i"},"content":{"rendered":"

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb, l\u00e0 n\u1ec1n t\u1ea3ng cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, ch\u00fang bi\u1ebfn d\u1ea1ng khi \u0111\u1eb7t d\u01b0\u1edbi \u0111i\u1ec7n tr\u01b0\u1eddng. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p ch\u00fang chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng gi\u1eefa d\u1ea1ng c\u01a1 h\u1ecdc v\u00e0 d\u1ea1ng \u0111i\u1ec7n, m\u1edf ra c\u00e1nh c\u1eeda cho v\u00f4 s\u1ed1 \u1ee9ng d\u1ee5ng.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n<\/h3>\n

B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. Khi m\u1ed9t l\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 l\u00e0m thay \u0111\u1ed5i c\u1ea5u tr\u00fac tinh th\u1ec3 b\u00ean trong, t\u1ea1o ra s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng \u0111i\u1ec7n t\u00edch. S\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng n\u00e0y bi\u1ec3u hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. Ng\u01b0\u1ee3c l\u1ea1i, khi \u0111\u1eb7t m\u1ed9t \u0111i\u1ec7n \u00e1p v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 l\u00e0m thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u, t\u1ea1o ra s\u1ef1 bi\u1ebfn d\u1ea1ng c\u01a1 h\u1ecdc.<\/p>\n

V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng d\u00f9ng<\/h3>\n

C\u00f3 nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, m\u1ed7i lo\u1ea1i c\u00f3 nh\u1eefng \u0111\u1eb7c t\u00ednh ri\u00eang bi\u1ec7t ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. M\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n\n\n\n\n\n
V\u1eadt li\u1ec7u<\/th>\n\u01afu \u0111i\u1ec3m<\/th>\nNh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
G\u1ed1m \u00e1p \u0111i\u1ec7n (PZT)<\/td>\n\u0110\u1ed9 nh\u1ea1y cao, gi\u00e1 th\u00e0nh th\u1ea5p<\/td>\nD\u1ec5 v\u1ee1<\/td>\n\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m, c\u1ea3m bi\u1ebfn<\/td>\n<\/tr>\n
Tinh th\u1ec3 th\u1ea1ch anh<\/td>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh cao, t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng ch\u00ednh x\u00e1c<\/td>\n\u0110\u1ed9 nh\u1ea1y th\u1ea5p h\u01a1n PZT<\/td>\n\u0110\u1ed3ng h\u1ed3, b\u1ed9 dao \u0111\u1ed9ng<\/td>\n<\/tr>\n
Polyvinylidene fluoride (PVDF)<\/td>\nLinh ho\u1ea1t, d\u1ebbo dai<\/td>\n\u0110\u1ed9 nh\u1ea1y th\u1ea5p<\/td>\nC\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t, micro<\/td>\n<\/tr>\n
Composite \u00e1p \u0111i\u1ec7n<\/td>\nK\u1ebft h\u1ee3p \u01b0u \u0111i\u1ec3m c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau<\/td>\nKh\u00f3 ch\u1ebf t\u1ea1o<\/td>\n\u1ee8ng d\u1ee5ng \u0111\u1eb7c bi\u1ec7t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n<\/h3>\n

B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n c\u00f3 nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c m\u1ee5c \u0111\u00edch c\u1ee5 th\u1ec3. M\u1ed9t s\u1ed1 lo\u1ea1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n

    \n
  • B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n d\u1ea1ng \u0111\u0129a:<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng si\u00eau \u00e2m, nh\u01b0 ki\u1ec3m tra v\u1eadt li\u1ec7u v\u00e0 h\u00ecnh \u1ea3nh y t\u1ebf.<\/li>\n
  • B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n d\u1ea1ng \u1ed1ng:<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111o \u00e1p su\u1ea5t v\u00e0 gia t\u1ed1c.<\/li>\n
  • B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n d\u1ea1ng m\u00e0ng:<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng micro v\u00e0 c\u1ea3m bi\u1ebfn \u00e2m thanh.<\/li>\n<\/ul>\n

    \u1ee8ng d\u1ee5ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n<\/h3>\n

    B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n c\u00f3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb c\u00f4ng nghi\u1ec7p \u0111\u1ebfn y t\u1ebf v\u00e0 \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 ti\u00eau bi\u1ec3u bao g\u1ed3m:<\/p>\n

      \n
    • \u0110\u1ea7u d\u00f2 si\u00eau \u00e2m:<\/strong> Trong l\u0129nh v\u1ef1c y t\u1ebf, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh si\u00eau \u00e2m. Trong c\u00f4ng nghi\u1ec7p, ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra v\u1eadt li\u1ec7u v\u00e0 ph\u00e1t hi\u1ec7n khuy\u1ebft t\u1eadt.<\/li>\n
    • C\u1ea3m bi\u1ebfn:<\/strong> B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u00e1p su\u1ea5t, gia t\u1ed1c, l\u1ef1c v\u00e0 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eadt l\u00fd kh\u00e1c.<\/li>\n
    • \u0110\u1ed9ng c\u01a1 piezo:<\/strong> B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra chuy\u1ec3n \u0111\u1ed9ng ch\u00ednh x\u00e1c trong c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 \u1ed5 \u0111\u0129a c\u1ee9ng v\u00e0 m\u00e1y in phun.<\/li>\n
    • B\u1ed9 \u0111\u00e1nh l\u1eeda:<\/strong> B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u1eadt l\u1eeda v\u00e0 b\u1ebfp gas \u0111\u1ec3 t\u1ea1o ra tia l\u1eeda \u0111i\u1ec7n.<\/li>\n
    • Thi\u1ebft b\u1ecb thu n\u0103ng l\u01b0\u1ee3ng:<\/strong> B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thu n\u0103ng l\u01b0\u1ee3ng t\u1eeb rung \u0111\u1ed9ng v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh \u0111i\u1ec7n n\u0103ng.<\/li>\n<\/ul>\n

      T\u00f3m l\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n l\u00e0 nh\u1eefng thi\u1ebft b\u1ecb linh ho\u1ea1t v\u00e0 \u0111a n\u0103ng, \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i. Kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng gi\u1eefa d\u1ea1ng c\u01a1 h\u1ecdc v\u00e0 d\u1ea1ng \u0111i\u1ec7n c\u1ee7a ch\u00fang m\u1edf ra ti\u1ec1m n\u0103ng to l\u1edbn cho s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"

      Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb, l\u00e0 n\u1ec1n t\u1ea3ng cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, ch\u00fang bi\u1ebfn d\u1ea1ng khi \u0111\u1eb7t<\/p>\n","protected":false},"author":1,"featured_media":24649,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-44508","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\/44508","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=44508"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44508\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/24649"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=44508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}