{"id":50900,"date":"2023-04-21T14:23:11","date_gmt":"2023-04-21T19:23:11","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-does-a-piezo-sensor-work\/"},"modified":"2025-01-21T07:11:55","modified_gmt":"2025-01-21T12:11:55","slug":"how-does-a-piezo-sensor-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-does-a-piezo-sensor-work\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n"},"content":{"rendered":"

C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n (piezoelectric sensor) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb chuy\u1ec3n \u0111\u1ed5i \u00e1p l\u1ef1c c\u01a1 h\u1ecdc th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. \u1ee8ng d\u1ee5ng c\u1ee7a ch\u00fang v\u00f4 c\u00f9ng r\u1ed9ng r\u00e3i, t\u1eeb vi\u1ec7c \u0111\u00e1nh l\u1eeda trong b\u1eadt l\u1eeda gas \u0111\u1ebfn \u0111o \u00e1p su\u1ea5t trong l\u1ed1p xe, v\u00e0 th\u1eadm ch\u00ed l\u00e0 t\u1ea1o ra \u00e2m thanh trong loa v\u00e0 micro. V\u1eady ch\u00ednh x\u00e1c th\u00ec ch\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n, t\u1eeb c\u1ea5u t\u1ea1o \u0111\u1ebfn c\u00e1c lo\u1ea1i v\u00e0 \u1ee9ng d\u1ee5ng.<\/p>\n

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

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n l\u00e0 n\u1ec1n t\u1ea3ng cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn piezo. Hi\u1ec7u \u1ee9ng n\u00e0y bao g\u1ed3m hai hi\u1ec7n t\u01b0\u1ee3ng: 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 \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp l\u00e0 kh\u1ea3 n\u0103ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n b\u1ecb bi\u1ebfn d\u1ea1ng c\u01a1 h\u1ecdc, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ecb n\u00e9n ho\u1eb7c k\u00e9o gi\u00e3n. Ng\u01b0\u1ee3c l\u1ea1i, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch \u0111\u1ea3o l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng khi \u0111\u1eb7t d\u01b0\u1edbi \u0111i\u1ec7n \u00e1p. C\u1ea3m bi\u1ebfn piezo ch\u1ee7 y\u1ebfu d\u1ef1a v\u00e0o hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i \u00e1p l\u1ef1c th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n.<\/p>\n

C\u1ea5u t\u1ea1o c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n

C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n nh\u01b0 th\u1ea1ch anh, g\u1ed1m \u00e1p \u0111i\u1ec7n (v\u00ed d\u1ee5: PZT – ch\u00ec zirconat titanat), ho\u1eb7c polymer \u00e1p \u0111i\u1ec7n (v\u00ed d\u1ee5: PVDF – polyvinylidene fluoride). V\u1eadt li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c k\u1eb9p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. Khi m\u1ed9t l\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean c\u1ea3m bi\u1ebfn, n\u00f3 l\u00e0m bi\u1ebfn d\u1ea1ng v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. \u0110i\u1ec7n \u00e1p n\u00e0y t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi l\u1ef1c t\u00e1c \u0111\u1ed9ng, cho ph\u00e9p c\u1ea3m bi\u1ebfn \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c \u00e1p l\u1ef1c \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng.<\/p>\n

C\u00e1c lo\u1ea1i c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n

C\u00f3 nhi\u1ec1u lo\u1ea1i c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n kh\u00e1c nhau, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. M\u1ed9t s\u1ed1 lo\u1ea1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n\n\n\n\n\n
Lo\u1ea1i c\u1ea3m bi\u1ebfn<\/th>\nM\u00f4 t\u1ea3<\/th>\n\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t<\/td>\n\u0110o \u00e1p su\u1ea5t t\u0129nh v\u00e0 \u0111\u1ed9ng<\/td>\n\u0110o \u00e1p su\u1ea5t l\u1ed1p xe, \u0111o \u00e1p su\u1ea5t m\u00e1u<\/td>\n<\/tr>\n
C\u1ea3m bi\u1ebfn gia t\u1ed1c<\/td>\n\u0110o gia t\u1ed1c v\u00e0 rung \u0111\u1ed9ng<\/td>\nH\u1ec7 th\u1ed1ng t\u00fai kh\u00ed, ph\u00e1t hi\u1ec7n \u0111\u1ed9ng \u0111\u1ea5t<\/td>\n<\/tr>\n
C\u1ea3m bi\u1ebfn l\u1ef1c<\/td>\n\u0110o l\u1ef1c t\u00e1c \u0111\u1ed9ng<\/td>\nC\u00e2n \u0111i\u1ec7n t\u1eed, robot<\/td>\n<\/tr>\n
C\u1ea3m bi\u1ebfn \u00e2m thanh<\/td>\nChuy\u1ec3n \u0111\u1ed5i \u00e2m thanh th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i<\/td>\nMicro, loa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ee8ng d\u1ee5ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n

C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, bao g\u1ed3m:<\/p>\n

    \n
  • \u00d4 t\u00f4:<\/strong> \u0110o \u00e1p su\u1ea5t l\u1ed1p, h\u1ec7 th\u1ed1ng t\u00fai kh\u00ed.<\/li>\n
  • Y t\u1ebf:<\/strong> \u0110o \u00e1p su\u1ea5t m\u00e1u, si\u00eau \u00e2m.<\/li>\n
  • C\u00f4ng nghi\u1ec7p:<\/strong> \u0110o l\u1ef1c, gi\u00e1m s\u00e1t rung \u0111\u1ed9ng m\u00e1y m\u00f3c.<\/li>\n
  • \u0110i\u1ec7n t\u1eed ti\u00eau d\u00f9ng:<\/strong> B\u1eadt l\u1eeda gas, loa, micro.<\/li>\n<\/ul>\n

    T\u00f3m l\u1ea1i, c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, chuy\u1ec3n \u0111\u1ed5i \u00e1p l\u1ef1c c\u01a1 h\u1ecdc th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. S\u1ef1 \u0111a d\u1ea1ng v\u1ec1 lo\u1ea1i v\u00e0 kh\u1ea3 n\u0103ng \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau, t\u1eeb \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y \u0111\u1ebfn c\u00e1c l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 cao. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 v\u1eadt li\u1ec7u \u0111ang ti\u1ebfp t\u1ee5c c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 m\u1edf r\u1ed9ng ph\u1ea1m vi \u1ee9ng d\u1ee5ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"

    C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n (piezoelectric sensor) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb chuy\u1ec3n \u0111\u1ed5i \u00e1p l\u1ef1c c\u01a1 h\u1ecdc th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. \u1ee8ng d\u1ee5ng c\u1ee7a ch\u00fang v\u00f4 c\u00f9ng r\u1ed9ng r\u00e3i, t\u1eeb vi\u1ec7c \u0111\u00e1nh l\u1eeda trong b\u1eadt l\u1eeda gas \u0111\u1ebfn \u0111o \u00e1p su\u1ea5t trong l\u1ed1p xe, v\u00e0 th\u1eadm ch\u00ed l\u00e0 t\u1ea1o ra \u00e2m thanh trong loa v\u00e0 micro.<\/p>\n","protected":false},"author":1,"featured_media":26466,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-50900","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\/50900","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=50900"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50900\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26466"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=50900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}