{"id":50892,"date":"2023-04-21T14:23:34","date_gmt":"2023-04-21T19:23:34","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-does-a-piezo-transducer-work\/"},"modified":"2025-01-21T07:11:56","modified_gmt":"2025-01-21T12:11:56","slug":"how-does-a-piezo-transducer-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-does-a-piezo-transducer-work\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n"},"content":{"rendered":"

\u00c1p \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 piezo, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1ea3m bi\u1ebfn piezo ho\u1eb7c \u0111\u01a1n gi\u1ea3n l\u00e0 piezo. Ch\u00fang ta g\u1eb7p c\u00e1c thi\u1ebft b\u1ecb n\u00e0y h\u00e0ng ng\u00e0y, t\u1eeb b\u1eadt l\u1eeda ga \u0111\u1ebfn micro v\u00e0 th\u1eadm ch\u00ed c\u1ea3 trong c\u00e1c thi\u1ebft b\u1ecb y t\u1ebf ph\u1ee9c t\u1ea1p. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo, kh\u00e1m ph\u00e1 c\u00e1ch ch\u00fang chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp v\u00e0 ngh\u1ecbch \u0111\u1ea3o<\/h3>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n t\u1ed3n t\u1ea1i d\u01b0\u1edbi hai d\u1ea1ng: tr\u1ef1c ti\u1ebfp v\u00e0 ngh\u1ecbch \u0111\u1ea3o. Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp m\u00f4 t\u1ea3 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc. Ng\u01b0\u1ee3c l\u1ea1i, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch \u0111\u1ea3o m\u00f4 t\u1ea3 s\u1ef1 thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u n\u00e0y khi \u0111\u1eb7t d\u01b0\u1edbi \u0111i\u1ec7n tr\u01b0\u1eddng. Ch\u00ednh s\u1ef1 chuy\u1ec3n \u0111\u1ed5i qua l\u1ea1i gi\u1eefa n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n n\u0103ng n\u00e0y cho ph\u00e9p b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo ho\u1ea1t \u0111\u1ed9ng.<\/p>\n

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

V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n l\u00e0 tr\u00e1i tim c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo. C\u00e1c v\u1eadt li\u1ec7u n\u00e0y, nh\u01b0 th\u1ea1ch anh, g\u1ed1m \u00e1p \u0111i\u1ec7n (v\u00ed d\u1ee5: PZT – ch\u00ec zirconat titanat) v\u00e0 polyme \u0111\u1eb7c bi\u1ec7t (v\u00ed d\u1ee5: PVDF – polyvinylidene fluoride), c\u00f3 c\u1ea5u tr\u00fac tinh th\u1ec3 \u0111\u1eb7c bi\u1ec7t. Khi ch\u1ecbu \u00e1p l\u1ef1c ho\u1eb7c bi\u1ebfn d\u1ea1ng, c\u1ea5u tr\u00fac tinh th\u1ec3 n\u00e0y b\u1ecb bi\u1ebfn \u0111\u1ed5i, d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e2n b\u1ed1 l\u1ea1i \u0111i\u1ec7n t\u00edch v\u00e0 t\u1ea1o ra \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u.<\/p>\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<\/tr>\n<\/thead>\n
Th\u1ea1ch anh<\/td>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh cao, tuy\u1ebfn t\u00ednh t\u1ed1t<\/td>\nHi\u1ec7u su\u1ea5t \u00e1p \u0111i\u1ec7n th\u1ea5p<\/td>\n<\/tr>\n
G\u1ed1m \u00e1p \u0111i\u1ec7n (PZT)<\/td>\nHi\u1ec7u su\u1ea5t \u00e1p \u0111i\u1ec7n cao<\/td>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 k\u00e9m h\u01a1n th\u1ea1ch anh<\/td>\n<\/tr>\n
Polyme (PVDF)<\/td>\nLinh ho\u1ea1t, d\u1ea3i t\u1ea7n s\u1ed1 r\u1ed9ng<\/td>\nHi\u1ec7u su\u1ea5t \u00e1p \u0111i\u1ec7n th\u1ea5p h\u01a1n g\u1ed1m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u1ea5u t\u1ea1o c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo<\/h3>\n

M\u1ed9t b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m m\u1ed9t ho\u1eb7c nhi\u1ec1u l\u1edbp v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c k\u1eb9p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. C\u00e1c \u0111i\u1ec7n c\u1ef1c n\u00e0y thu th\u1eadp \u0111i\u1ec7n t\u00edch \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp ho\u1eb7c cung c\u1ea5p \u0111i\u1ec7n tr\u01b0\u1eddng c\u1ea7n thi\u1ebft cho hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch \u0111\u1ea3o. To\u00e0n b\u1ed9 c\u1ea5u tr\u00fac \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i cho \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n

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

B\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c. Trong l\u0129nh v\u1ef1c y t\u1ebf, ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong si\u00eau \u00e2m ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh. Trong c\u00f4ng nghi\u1ec7p, ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m c\u1ea3m bi\u1ebfn \u0111o \u00e1p su\u1ea5t, gia t\u1ed1c v\u00e0 rung \u0111\u1ed9ng. Ch\u00fang c\u0169ng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng nh\u01b0 loa, micro v\u00e0 b\u1eadt l\u1eeda. V\u00ed d\u1ee5, m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb si\u00eau \u00e2m s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 \u00e1p \u0111i\u1ec7n. N\u1ebfu c\u1ea7n thi\u1ebft ph\u1ea3i \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u c\u1ee5 th\u1ec3 trong b\u1ed1i c\u1ea3nh si\u00eau \u00e2m, Beijing Ultrasonic c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t.<\/p>\n

T\u00f3m l\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo l\u00e0 nh\u1eefng thi\u1ebft b\u1ecb linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3, t\u1eadn d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng gi\u1eefa d\u1ea1ng c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n. T\u1eeb c\u00e1c \u1ee9ng d\u1ee5ng y t\u1ebf c\u1ee9u s\u1ed1ng \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u00e0ng ng\u00e0y, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong cu\u1ed9c s\u1ed1ng hi\u1ec7n \u0111\u1ea1i, v\u00e0 ti\u1ec1m n\u0103ng c\u1ee7a ch\u00fang v\u1eabn \u0111ang ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1 v\u00e0 ph\u00e1t tri\u1ec3n.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u00c1p \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 piezo, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1ea3m bi\u1ebfn piezo ho\u1eb7c \u0111\u01a1n gi\u1ea3n l\u00e0 piezo. Ch\u00fang ta g\u1eb7p c\u00e1c thi\u1ebft b\u1ecb n\u00e0y h\u00e0ng ng\u00e0y, t\u1eeb b\u1eadt l\u1eeda ga \u0111\u1ebfn micro v\u00e0 th\u1eadm ch\u00ed c\u1ea3 trong c\u00e1c thi\u1ebft<\/p>\n","protected":false},"author":1,"featured_media":19418,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-50892","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\/50892","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=50892"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50892\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/19418"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=50892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}