{"id":51132,"date":"2023-04-21T14:09:26","date_gmt":"2023-04-21T19:09:26","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-do-piezo-transducers-work\/"},"modified":"2025-01-21T07:11:23","modified_gmt":"2025-01-21T12:11:23","slug":"how-do-piezo-transducers-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-do-piezo-transducers-work\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \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. Hi\u1ec7u \u1ee9ng n\u00e0y cho ph\u00e9p m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc. Ng\u01b0\u1ee3c l\u1ea1i, khi \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p v\u00e0o v\u1eadt li\u1ec7u n\u00e0y, ch\u00fang s\u1ebd thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng. S\u1ef1 chuy\u1ec3n \u0111\u1ed5i qua l\u1ea1i gi\u1eefa n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n n\u00e0y ch\u00ednh l\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ed1t l\u00f5i c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o chi ti\u1ebft v\u1ec1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo, t\u1eeb c\u1ea5u t\u1ea1o v\u1eadt li\u1ec7u \u0111\u1ebfn \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n.<\/p>\n

V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a ch\u00fang<\/h3>\n

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 v\u1eadt li\u1ec7u polyme. PZT l\u00e0 lo\u1ea1i v\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n ph\u1ed5 bi\u1ebfn nh\u1ea5t nh\u1edd t\u00ednh \u00e1p \u0111i\u1ec7n m\u1ea1nh v\u00e0 kh\u1ea3 n\u0103ng ch\u1ebf t\u1ea1o theo nhi\u1ec1u h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc kh\u00e1c nhau. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y so s\u00e1nh m\u1ed9t s\u1ed1 \u0111\u1eb7c t\u00ednh c\u1ee7a c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n kh\u00e1c nhau:<\/p>\n\n\n\n\n\n\n\n
V\u1eadt li\u1ec7u<\/th>\n\u0110\u1ed9 nh\u1ea1y \u00e1p \u0111i\u1ec7n<\/th>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t<\/th>\nGi\u00e1 th\u00e0nh<\/th>\n<\/tr>\n<\/thead>\n
Th\u1ea1ch anh<\/td>\nTh\u1ea5p<\/td>\nCao<\/td>\nTrung b\u00ecnh<\/td>\n<\/tr>\n
G\u1ed1m (PZT)<\/td>\nCao<\/td>\nTrung b\u00ecnh<\/td>\nTh\u1ea5p<\/td>\n<\/tr>\n
Polyme (PVDF)<\/td>\nTrung b\u00ecnh<\/td>\nTh\u1ea5p<\/td>\nCao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

B\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hai hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ch\u00ednh: hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp v\u00e0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch \u0111\u1ea3o. Hi\u1ec7u \u1ee9ng tr\u1ef1c ti\u1ebfp x\u1ea3y ra khi v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n b\u1ecb t\u00e1c \u0111\u1ed9ng b\u1edfi m\u1ed9t l\u1ef1c c\u01a1 h\u1ecdc, t\u1ea1o ra \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. Hi\u1ec7u \u1ee9ng ngh\u1ecbch \u0111\u1ea3o x\u1ea3y ra khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, l\u00e0m cho v\u1eadt li\u1ec7u thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc.<\/p>\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 mi\u1ebfng v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c k\u1eb9p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. Khi m\u1ed9t l\u1ef1c c\u01a1 h\u1ecdc t\u00e1c \u0111\u1ed9ng l\u00ean b\u1ed9 chuy\u1ec3n \u0111\u1ed5i, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n b\u1ecb bi\u1ebfn d\u1ea1ng, t\u1ea1o ra \u0111i\u1ec7n \u00e1p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. Ng\u01b0\u1ee3c l\u1ea1i, khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u00e0o hai \u0111i\u1ec7n c\u1ef1c, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n s\u1ebd thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc, t\u1ea1o ra m\u1ed9t l\u1ef1c c\u01a1 h\u1ecdc.<\/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, t\u1eeb c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u00e0ng ng\u00e0y \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ph\u1ee9c t\u1ea1p. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n

    \n
  • \u0110\u1ea7u d\u00f2 si\u00eau \u00e2m:<\/strong> Trong l\u0129nh v\u1ef1c y t\u1ebf v\u00e0 c\u00f4ng nghi\u1ec7p, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o v\u00e0 ph\u00e1t hi\u1ec7n s\u00f3ng si\u00eau \u00e2m. V\u00ed d\u1ee5, trong c\u00e1c thi\u1ebft b\u1ecb si\u00eau \u00e2m y t\u1ebf, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh c\u1ee7a c\u00e1c c\u01a1 quan b\u00ean trong c\u01a1 th\u1ec3. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p li\u00ean quan \u0111\u1ebfn si\u00eau \u00e2m, c\u00e1c c\u00f4ng ty nh\u01b0 Beijing Ultrasonic cung c\u1ea5p c\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i chuy\u00ean d\u1ee5ng.<\/li>\n
  • C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t:<\/strong> B\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u00e1p su\u1ea5t trong c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 trong ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4 v\u00e0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5.<\/li>\n
  • Thi\u1ebft b\u1ecb \u0111\u00e1nh l\u1eeda:<\/strong> Trong b\u1eadt l\u1eeda gas v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i b\u1ebfp gas, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra tia l\u1eeda \u0111i\u1ec7n.<\/li>\n
  • \u0110\u1ed3ng h\u1ed3 th\u1ea1ch anh:<\/strong> Th\u1ea1ch anh, m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u1ed3ng h\u1ed3 th\u1ea1ch anh \u0111\u1ec3 t\u1ea1o ra dao \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n

    T\u00f3m l\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb linh ho\u1ea1t v\u00e0 h\u1eefu \u00edch d\u1ef1a tr\u00ean nguy\u00ean l\u00fd 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 c\u1ea5u t\u1ea1o cho ph\u00e9p b\u1ed9 chuy\u1ec3n \u0111\u1ed5i piezo \u0111\u00e1p \u1ee9ng nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau, t\u1eeb c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t \u0111\u1ebfn t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m, \u0111\u00f3ng g\u00f3p \u0111\u00e1ng k\u1ec3 v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a khoa h\u1ecdc c\u00f4ng ngh\u1ec7.<\/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. Hi\u1ec7u \u1ee9ng n\u00e0y cho ph\u00e9p m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc. Ng\u01b0\u1ee3c l\u1ea1i, khi \u00e1p d\u1ee5ng \u0111i\u1ec7n<\/p>\n","protected":false},"author":1,"featured_media":19421,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-51132","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\/51132","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=51132"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/51132\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/19421"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=51132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=51132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=51132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}