{"id":51012,"date":"2023-04-21T14:16:54","date_gmt":"2023-04-21T19:16:54","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-do-ultrasound-transducers-work\/"},"modified":"2025-01-21T07:11:42","modified_gmt":"2025-01-21T12:11:42","slug":"how-do-ultrasound-transducers-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-do-ultrasound-transducers-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 c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Vung \u0111\u0169a th\u1ea7n k\u1ef3 n\u00e0y ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd s\u00f3ng \u00e2m t\u1ea7n s\u1ed1 cao, \u0111\u01b0\u1ee3c t\u1ea1o ra v\u00e0 thu nh\u1eadn b\u1edfi m\u1ed9t b\u1ed9 ph\u1eadn quan tr\u1ecdng g\u1ecdi l\u00e0 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m. 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 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a lo\u1ea1i thi\u1ebft b\u1ecb quan tr\u1ecdng n\u00e0y.<\/p>\n<h3>Nguy\u00ean L\u00fd Ho\u1ea1t \u0110\u1ed9ng C\u1ee7a \u0110\u1ea7u D\u00f2 Si\u00eau \u00c2m<\/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 cho ph\u00e9p m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh, th\u01b0\u1eddng l\u00e0 c\u00e1c tinh th\u1ec3 g\u1ed1m \u00e1p \u0111i\u1ec7n, 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. Khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p v\u00e0o tinh th\u1ec3 \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng v\u00e0 t\u1ea1o ra s\u00f3ng \u00e2m. Ng\u01b0\u1ee3c l\u1ea1i, khi s\u00f3ng \u00e2m t\u00e1c \u0111\u1ed9ng v\u00e0o tinh th\u1ec3, n\u00f3 s\u1ebd t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p.<\/p>\n<h3>C\u1ea5u T\u1ea1o C\u1ee7a \u0110\u1ea7u D\u00f2 Si\u00eau \u00c2m<\/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, m\u1ed7i th\u00e0nh ph\u1ea7n \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ea1o ra v\u00e0 thu nh\u1eadn s\u00f3ng si\u00eau \u00e2m. C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Tinh th\u1ec3 \u00e1p \u0111i\u1ec7n:<\/strong> \u0110\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i, ch\u1ecbu tr\u00e1ch nhi\u1ec7m 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.<\/li>\n<li><strong>L\u1edbp kh\u1edbp n\u1ed1i:<\/strong> L\u1edbp n\u00e0y gi\u00fap truy\u1ec1n s\u00f3ng \u00e2m hi\u1ec7u qu\u1ea3 t\u1eeb tinh th\u1ec3 \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng c\u1ea7n ki\u1ec3m tra v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n<li><strong>L\u1edbp b\u1ea3o v\u1ec7:<\/strong> L\u1edbp n\u00e0y b\u1ea3o v\u1ec7 tinh th\u1ec3 kh\u1ecfi b\u1ecb h\u01b0 h\u1ecfng do t\u00e1c \u0111\u1ed9ng t\u1eeb m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i.<\/li>\n<li><strong>V\u1ecf:<\/strong> V\u1ecf b\u1ecdc b\u00ean ngo\u00e0i b\u1ea3o v\u1ec7 to\u00e0n b\u1ed9 c\u1ea5u tr\u00fac c\u1ee7a \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 m\u00e1y si\u00eau \u00e2m \u0111\u1ec3 truy\u1ec1n t\u1ea3i t\u00edn hi\u1ec7u \u0111i\u1ec7n.<\/li>\n<\/ul>\n<h3>C\u00e1c Lo\u1ea1i \u0110\u1ea7u D\u00f2 Si\u00eau \u00c2m<\/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. M\u1ed9t s\u1ed1 lo\u1ea1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Lo\u1ea1i \u0110\u1ea7u D\u00f2<\/th>\n<th>T\u1ea7n S\u1ed1<\/th>\n<th>\u1ee8ng D\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tuy\u1ebfn t\u00ednh<\/td>\n<td>Cao<\/td>\n<td>Ki\u1ec3m tra b\u1ec1 m\u1eb7t, y t\u1ebf<\/td>\n<\/tr>\n<tr>\n<td>Phased Array<\/td>\n<td>Th\u1ea5p \u0111\u1ebfn cao<\/td>\n<td>Ki\u1ec3m tra m\u1ed1i h\u00e0n, y t\u1ebf tim m\u1ea1ch<\/td>\n<\/tr>\n<tr>\n<td>L\u1ed3i<\/td>\n<td>Th\u1ea5p<\/td>\n<td>Ki\u1ec3m tra b\u1ee5ng, s\u1ea3n khoa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>T\u1ea7n S\u1ed1 V\u00e0 \u0110\u1ed9 Ph\u00e2n Gi\u1ea3i<\/h3>\n<p>T\u1ea7n s\u1ed1 c\u1ee7a \u0111\u1ea7u d\u00f2 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a h\u00ecnh \u1ea3nh si\u00eau \u00e2m. \u0110\u1ea7u d\u00f2 t\u1ea7n s\u1ed1 cao cho \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao h\u01a1n nh\u01b0ng \u0111\u1ed9 xuy\u00ean th\u1ea5u th\u1ea5p h\u01a1n, ph\u00f9 h\u1ee3p cho vi\u1ec7c ki\u1ec3m tra c\u00e1c c\u1ea5u tr\u00fac n\u00f4ng. Ng\u01b0\u1ee3c l\u1ea1i, \u0111\u1ea7u d\u00f2 t\u1ea7n s\u1ed1 th\u1ea5p c\u00f3 \u0111\u1ed9 xuy\u00ean th\u1ea5u cao h\u01a1n nh\u01b0ng \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p h\u01a1n, ph\u00f9 h\u1ee3p cho vi\u1ec7c ki\u1ec3m tra c\u00e1c c\u1ea5u tr\u00fac s\u00e2u.<\/p>\n<h3>Qu\u00e1 Tr\u00ecnh T\u1ea1o V\u00e0 Thu Nh\u1eadn S\u00f3ng Si\u00eau \u00c2m<\/h3>\n<p>Khi m\u1ed9t xung \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u00e1p v\u00e0o tinh th\u1ec3 \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd dao \u0111\u1ed9ng v\u00e0 t\u1ea1o ra s\u00f3ng \u00e2m. S\u00f3ng \u00e2m n\u00e0y truy\u1ec1n qua m\u00f4i tr\u01b0\u1eddng c\u1ea7n ki\u1ec3m tra v\u00e0 khi g\u1eb7p m\u1ed9t ranh gi\u1edbi gi\u1eefa hai m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau, m\u1ed9t ph\u1ea7n s\u00f3ng \u00e2m s\u1ebd b\u1ecb ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i \u0111\u1ea7u d\u00f2. \u0110\u1ea7u d\u00f2 sau \u0111\u00f3 s\u1ebd thu nh\u1eadn s\u00f3ng \u00e2m ph\u1ea3n x\u1ea1 n\u00e0y v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. T\u00edn hi\u1ec7u \u0111i\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1edfi m\u00e1y si\u00eau \u00e2m \u0111\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh.<\/p>\n<p>T\u00f3m l\u1ea1i, \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ph\u1ee9c t\u1ea1p nh\u01b0ng ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd v\u1eadt l\u00fd c\u01a1 b\u1ea3n l\u00e0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa tinh th\u1ec3 \u00e1p \u0111i\u1ec7n, l\u1edbp kh\u1edbp n\u1ed1i, v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c cho ph\u00e9p \u0111\u1ea7u d\u00f2 t\u1ea1o ra v\u00e0 thu nh\u1eadn s\u00f3ng si\u00eau \u00e2m, t\u1eeb \u0111\u00f3 cung c\u1ea5p th\u00f4ng tin quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng.  Vi\u1ec7c l\u1ef1a ch\u1ecdn lo\u1ea1i \u0111\u1ea7u d\u00f2 ph\u00f9 h\u1ee3p v\u1edbi t\u1ea7n s\u1ed1 v\u00e0 c\u1ea5u t\u1ea1o th\u00edch h\u1ee3p l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh cho hi\u1ec7u qu\u1ea3 c\u1ee7a vi\u1ec7c ki\u1ec3m tra v\u00e0 ch\u1ea9n \u0111o\u00e1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si\u00eau \u00e2m \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Vung \u0111\u0169a th\u1ea7n k\u1ef3 n\u00e0y ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd s\u00f3ng \u00e2m t\u1ea7n s\u1ed1 cao, \u0111\u01b0\u1ee3c t\u1ea1o ra v\u00e0 thu nh\u1eadn b\u1edfi m\u1ed9t b\u1ed9 ph\u1eadn quan tr\u1ecdng g\u1ecdi l\u00e0 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m.<\/p>\n","protected":false},"author":1,"featured_media":24654,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-51012","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\/51012","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=51012"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/51012\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/24654"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=51012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=51012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=51012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}