{"id":51108,"date":"2023-04-21T14:10:42","date_gmt":"2023-04-21T19:10:42","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-do-piezoelectric-transducers-work\/"},"modified":"2025-01-21T07:11:27","modified_gmt":"2025-01-21T12:11:27","slug":"how-do-piezoelectric-transducers-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-do-piezoelectric-transducers-work\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n"},"content":{"rendered":"

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb, cho ph\u00e9p 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. V\u1eady c\u00e1c \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n, thi\u1ebft b\u1ecb t\u1eadn d\u1ee5ng hi\u1ec7u \u1ee9ng n\u00e0y, 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 ch\u00fang, t\u1eeb c\u1ea5u t\u1ea1o v\u1eadt li\u1ec7u \u0111\u1ebfn \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n.<\/p>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n v\u00e0 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/h3>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n x\u1ea3y ra trong m\u1ed9t s\u1ed1 lo\u1ea1i v\u1eadt li\u1ec7u \u0111\u1eb7c bi\u1ec7t g\u1ecdi l\u00e0 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n. Khi v\u1eadt li\u1ec7u n\u00e0y b\u1ecb t\u00e1c \u0111\u1ed9ng b\u1edfi m\u1ed9t l\u1ef1c c\u01a1 h\u1ecdc, ch\u1eb3ng h\u1ea1n nh\u01b0 n\u00e9n ho\u1eb7c k\u00e9o, n\u00f3 s\u1ebd t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p. Ng\u01b0\u1ee3c l\u1ea1i, khi \u0111\u1eb7t m\u1ed9t \u0111i\u1ec7n \u00e1p v\u00e0o v\u1eadt li\u1ec7u n\u00e0y, n\u00f3 s\u1ebd bi\u1ebfn d\u1ea1ng, co l\u1ea1i ho\u1eb7c gi\u00e3n n\u1edf. C\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng bao g\u1ed3m g\u1ed1m \u00e1p \u0111i\u1ec7n (nh\u01b0 PZT – Lead Zirconate Titanate), th\u1ea1ch anh, v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i polymer.<\/p>\n

C\u1ea5u t\u1ea1o c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n<\/h3>\n

M\u1ed9t \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m m\u1ed9t ho\u1eb7c nhi\u1ec1u mi\u1ebfng 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 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t m\u1ea1ch \u0111i\u1ec7n \u0111\u1ec3 \u0111o ho\u1eb7c t\u1ea1o ra \u0111i\u1ec7n \u00e1p. V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, v\u00ed d\u1ee5 nh\u01b0 t\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng mong mu\u1ed1n, \u0111\u1ed9 nh\u1ea1y v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u1edf ch\u1ebf \u0111\u1ed9 ph\u00e1t<\/h3>\n

Khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o hai \u0111i\u1ec7n c\u1ef1c c\u1ee7a \u0111\u1ea7u d\u00f2, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n s\u1ebd bi\u1ebfn d\u1ea1ng. S\u1ef1 bi\u1ebfn d\u1ea1ng n\u00e0y t\u1ea1o ra s\u00f3ng \u00e1p su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng xung quanh, v\u00ed d\u1ee5 nh\u01b0 kh\u00f4ng kh\u00ed ho\u1eb7c n\u01b0\u1edbc. T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng \u00e1p su\u1ea5t n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u1edf ch\u1ebf \u0111\u1ed9 thu<\/h3>\n

Khi \u0111\u1ea7u d\u00f2 ti\u1ebfp x\u00fac v\u1edbi s\u00f3ng \u00e1p su\u1ea5t, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n b\u00ean trong s\u1ebd b\u1ecb n\u00e9n ho\u1eb7c gi\u00e3n n\u1edf. S\u1ef1 thay \u0111\u1ed5i n\u00e0y t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p tr\u00ean c\u00e1c \u0111i\u1ec7n c\u1ef1c. \u0110i\u1ec7n \u00e1p n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i v\u00e0 x\u1eed l\u00fd \u0111\u1ec3 thu \u0111\u01b0\u1ee3c th\u00f4ng tin v\u1ec1 s\u00f3ng \u00e1p su\u1ea5t, ch\u1eb3ng h\u1ea1n nh\u01b0 bi\u00ean \u0111\u1ed9 v\u00e0 t\u1ea7n s\u1ed1.<\/p>\n

C\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n<\/h3>\n

\u0110\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, bao g\u1ed3m:<\/p>\n\n\n\n\n\n\n\n\n\n
\u1ee8ng d\u1ee5ng<\/th>\nM\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m<\/td>\n\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong y t\u1ebf \u0111\u1ec3 t\u1ea1o \u1ea3nh b\u00ean trong c\u01a1 th\u1ec3, trong c\u00f4ng nghi\u1ec7p \u0111\u1ec3 ki\u1ec3m tra v\u1eadt li\u1ec7u v\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng l\u00e0m s\u1ea1ch b\u1eb1ng si\u00eau \u00e2m.<\/td>\n<\/tr>\n
C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t<\/td>\n\u0110o \u00e1p su\u1ea5t trong c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau, t\u1eeb l\u1ed1p xe \u0111\u1ebfn m\u00e1y bay.<\/td>\n<\/tr>\n
M\u00e1y ph\u00e1t \u0111i\u1ec7n<\/td>\nChuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n, v\u00ed d\u1ee5 nh\u01b0 trong b\u1eadt l\u1eeda piezo.<\/td>\n<\/tr>\n
Loa v\u00e0 microphone<\/td>\nT\u1ea1o ra v\u00e0 thu \u00e2m thanh.<\/td>\n<\/tr>\n
\u0110\u1ed9ng c\u01a1 \u00e1p \u0111i\u1ec7n<\/td>\nS\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n \u0111\u1ec3 t\u1ea1o ra chuy\u1ec3n \u0111\u1ed9ng ch\u00ednh x\u00e1c.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nh\u01b0 v\u1eady, \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n 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. T\u1eeb vi\u1ec7c t\u1ea1o \u1ea3nh y t\u1ebf \u0111\u1ebfn \u0111o \u00e1p su\u1ea5t v\u00e0 t\u1ea1o ra chuy\u1ec3n \u0111\u1ed9ng, \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i.<\/p>\n","protected":false},"excerpt":{"rendered":"

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb, cho ph\u00e9p 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. V\u1eady c\u00e1c \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n, thi\u1ebft b\u1ecb t\u1eadn d\u1ee5ng hi\u1ec7u \u1ee9ng n\u00e0y, 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<\/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-51108","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\/51108","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=51108"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/51108\/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=51108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=51108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=51108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}