{"id":50476,"date":"2023-04-21T14:49:48","date_gmt":"2023-04-21T19:49:48","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-does-ultrasonic-transducer-work\/"},"modified":"2025-01-21T07:12:58","modified_gmt":"2025-01-21T12:12:58","slug":"how-does-ultrasonic-transducer-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-does-ultrasonic-transducer-work\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m"},"content":{"rendered":"<p>Si\u00eau \u00e2m \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng ngh\u1ec7 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y.  Trung t\u00e2m c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y ch\u00ednh l\u00e0 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m, m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc d\u01b0\u1edbi d\u1ea1ng s\u00f3ng \u00e2m t\u1ea7n s\u1ed1 cao v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. V\u1eady \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m 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 chi ti\u1ebft c\u1ee7a thi\u1ebft b\u1ecb quan tr\u1ecdng n\u00e0y.<\/p>\n<h3>Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n v\u00e0 vai tr\u00f2 c\u1ee7a n\u00f3<\/h3>\n<p>\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. Hi\u1ec7u \u1ee9ng n\u00e0y m\u00f4 t\u1ea3 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh, nh\u01b0 g\u1ed1m \u00e1p \u0111i\u1ec7n (v\u00ed d\u1ee5: PZT &#8211; ch\u00ec zirconate titanate), bi\u1ebfn \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc (\u00e1p su\u1ea5t, rung \u0111\u1ed9ng) th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.  Khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng, t\u1ea1o ra s\u00f3ng \u00e2m. Ng\u01b0\u1ee3c l\u1ea1i, khi v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a s\u00f3ng \u00e2m, n\u00f3 s\u1ebd t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p.<\/p>\n<h3>C\u1ea5u t\u1ea1o c\u1ee7a \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m<\/h3>\n<p>M\u1ed9t \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m nhi\u1ec1u th\u00e0nh ph\u1ea7n quan tr\u1ecdng:<\/p>\n<ul>\n<li><strong>V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n:<\/strong> \u0110\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i, th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb g\u1ed1m \u00e1p \u0111i\u1ec7n.<\/li>\n<li><strong>\u0110i\u1ec7n c\u1ef1c:<\/strong>  Hai \u0111i\u1ec7n c\u1ef1c \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u1ec3 \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p v\u00e0 thu th\u1eadp t\u00edn hi\u1ec7u \u0111i\u1ec7n.<\/li>\n<li><strong>L\u1edbp kh\u1edbp n\u1ed1i:<\/strong> L\u1edbp n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1eb7t ph\u00eda tr\u01b0\u1edbc v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u1ec3 gi\u00fap truy\u1ec1n s\u00f3ng \u00e2m hi\u1ec7u qu\u1ea3 v\u00e0o m\u00f4i tr\u01b0\u1eddng c\u1ea7n ki\u1ec3m tra.<\/li>\n<li><strong>V\u1ecf b\u1ea3o v\u1ec7:<\/strong> V\u1ecf b\u1ea3o v\u1ec7 bao b\u1ecdc c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 an to\u00e0n cho \u0111\u1ea7u d\u00f2.<\/li>\n<li><strong>D\u00e2y d\u1eabn:<\/strong> D\u00e2y d\u1eabn k\u1ebft n\u1ed1i \u0111\u1ea7u d\u00f2 v\u1edbi thi\u1ebft b\u1ecb t\u1ea1o xung v\u00e0 x\u1eed l\u00fd t\u00edn hi\u1ec7u.<\/li>\n<\/ul>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Th\u00e0nh ph\u1ea7n<\/th>\n<th>Ch\u1ee9c n\u0103ng<\/th>\n<th>V\u1eadt li\u1ec7u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/td>\n<td>Chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i<\/td>\n<td>G\u1ed1m \u00e1p \u0111i\u1ec7n (PZT)<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec7n c\u1ef1c<\/td>\n<td>\u00c1p d\u1ee5ng \u0111i\u1ec7n \u00e1p v\u00e0 thu th\u1eadp t\u00edn hi\u1ec7u \u0111i\u1ec7n<\/td>\n<td>Kim lo\u1ea1i d\u1eabn \u0111i\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td>L\u1edbp kh\u1edbp n\u1ed1i<\/td>\n<td>Truy\u1ec1n s\u00f3ng \u00e2m v\u00e0o m\u00f4i tr\u01b0\u1eddng<\/td>\n<td>Polymer, gel<\/td>\n<\/tr>\n<tr>\n<td>V\u1ecf b\u1ea3o v\u1ec7<\/td>\n<td>B\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong<\/td>\n<td>Kim lo\u1ea1i, nh\u1ef1a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Qu\u00e1 tr\u00ecnh ph\u00e1t s\u00f3ng si\u00eau \u00e2m<\/h3>\n<p>Khi m\u1ed9t xung \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p v\u00e0o \u0111i\u1ec7n c\u1ef1c c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd l\u00e0m thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u n\u00e0y. S\u1ef1 thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc n\u00e0y t\u1ea1o ra s\u00f3ng \u00e1p su\u1ea5t lan truy\u1ec1n trong m\u00f4i tr\u01b0\u1eddng d\u01b0\u1edbi d\u1ea1ng s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi t\u1ea7n s\u1ed1 c\u1ee7a xung \u0111i\u1ec7n \u00e1p \u0111\u1eb7t v\u00e0o.<\/p>\n<h3>Qu\u00e1 tr\u00ecnh nh\u1eadn s\u00f3ng si\u00eau \u00e2m<\/h3>\n<p>Khi s\u00f3ng si\u00eau \u00e2m ph\u1ea3n x\u1ea1 t\u1eeb b\u1ec1 m\u1eb7t ho\u1eb7c v\u1eadt th\u1ec3 trong m\u00f4i tr\u01b0\u1eddng, n\u00f3 t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n c\u1ee7a \u0111\u1ea7u d\u00f2.  S\u1ef1 t\u00e1c \u0111\u1ed9ng n\u00e0y t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p tr\u00ean \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 t\u1ea1o ra h\u00ecnh \u1ea3nh ho\u1eb7c d\u1eef li\u1ec7u \u0111o l\u01b0\u1eddng.<\/p>\n<h3>C\u00e1c lo\u1ea1i \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m<\/h3>\n<p>C\u00f3 nhi\u1ec1u lo\u1ea1i \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m kh\u00e1c nhau, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.  V\u00ed d\u1ee5, \u0111\u1ea7u d\u00f2 ti\u1ebfp x\u00fac \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ki\u1ec3m tra v\u1eadt li\u1ec7u, trong khi \u0111\u1ea7u d\u00f2 ng\u00e2m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong si\u00eau \u00e2m y t\u1ebf.<\/p>\n<p>T\u00f3m l\u1ea1i, \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb tinh vi ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, cho ph\u00e9p chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc d\u01b0\u1edbi d\u1ea1ng s\u00f3ng \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.  S\u1ef1 hi\u1ec3u qu\u1ea3 v\u00e0 ch\u00ednh x\u00e1c c\u1ee7a \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, thi\u1ebft k\u1ebf v\u00e0 t\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng.  \u1ee8ng d\u1ee5ng c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y \u0111ang ng\u00e0y c\u00e0ng m\u1edf r\u1ed9ng, \u0111\u00f3ng g\u00f3p \u0111\u00e1ng k\u1ec3 v\u00e0o nhi\u1ec1u l\u0129nh v\u1ef1c khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si\u00eau \u00e2m \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng ngh\u1ec7 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. Trung t\u00e2m c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y ch\u00ednh l\u00e0 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m, m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc d\u01b0\u1edbi d\u1ea1ng<\/p>\n","protected":false},"author":1,"featured_media":19420,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-50476","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\/50476","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=50476"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50476\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/19420"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=50476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}