{"id":53434,"date":"2022-10-03T18:53:36","date_gmt":"2022-10-03T23:53:36","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-ultrasonic-transducers-work\/"},"modified":"2025-01-21T07:24:53","modified_gmt":"2025-01-21T12:24:53","slug":"how-ultrasonic-transducers-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-ultrasonic-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 ngh\u1ec7 thi\u1ebft y\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Trung t\u00e2m c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y 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 s\u00f3ng \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m, gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u01a1 ch\u1ebf \u0111\u1eb1ng sau c\u00f4ng ngh\u1ec7 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, ch\u1eb3ng h\u1ea1n nh\u01b0 g\u1ed1m \u00e1p \u0111i\u1ec7n (th\u01b0\u1eddng l\u00e0 PZT &#8211; ch\u00ec zirconat titanat), thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng khi \u0111\u1eb7t d\u01b0\u1edbi \u0111i\u1ec7n \u00e1p v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi b\u1ecb n\u00e9n ho\u1eb7c gi\u00e3n n\u1edf.  \u0110\u00e2y ch\u00ednh l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh s\u00f3ng \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/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, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n:<\/strong> Th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i ch\u1ecbu tr\u00e1ch nhi\u1ec7m t\u1ea1o ra v\u00e0 ph\u00e1t hi\u1ec7n s\u00f3ng si\u00eau \u00e2m.<\/li>\n<li><strong>\u0110i\u1ec7n c\u1ef1c:<\/strong>  Hai l\u1edbp \u0111i\u1ec7n c\u1ef1c \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u1ec3 t\u1ea1o ra \u0111i\u1ec7n tr\u01b0\u1eddng c\u1ea7n thi\u1ebft cho hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n.<\/li>\n<li><strong>L\u1edbp k\u1ebft h\u1ee3p:<\/strong> L\u1edbp n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1eb7t ph\u00eda tr\u01b0\u1edbc v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, gi\u00fap truy\u1ec1n t\u1ea3i 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> Bao b\u1ecdc v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong kh\u1ecfi t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li><strong>D\u00e2y k\u1ebft n\u1ed1i:<\/strong> D\u00f9ng \u0111\u1ec3 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<h3>Qu\u00e1 tr\u00ecnh t\u1ea1o s\u00f3ng si\u00eau \u00e2m<\/h3>\n<p>Khi m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u \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 theo t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p. 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, ch\u00ednh l\u00e0 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 \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 v\u1eadt th\u1ec3 quay tr\u1edf l\u1ea1i \u0111\u1ea7u d\u00f2, n\u00f3 g\u00e2y ra \u00e1p l\u1ef1c l\u00ean v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n. \u00c1p l\u1ef1c 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, m\u1ed7i lo\u1ea1i \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 \u0111\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>T\u1ea7n s\u1ed1 th\u1ea5p (d\u01b0\u1edbi 1 MHz)<\/td>\n<td>&lt; 1 MHz<\/td>\n<td>Ki\u1ec3m tra v\u1eadt li\u1ec7u d\u00e0y, \u0111o \u0111\u1ed9 s\u00e2u<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1 cao (tr\u00ean 1 MHz)<\/td>\n<td>&gt; 1 MHz<\/td>\n<td>Ki\u1ec3m tra v\u1eadt li\u1ec7u m\u1ecfng, h\u00ecnh \u1ea3nh y t\u1ebf<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea7u d\u00f2 ti\u1ebfp x\u00fac<\/td>\n<td><\/td>\n<td>Ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi v\u1eadt th\u1ec3<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea7u d\u00f2 nh\u00fang<\/td>\n<td><\/td>\n<td>S\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng l\u1ecfng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>T\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ea7u d\u00f2<\/h3>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a \u1ee9ng d\u1ee5ng. C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t bao g\u1ed3m t\u1ea7n s\u1ed1, k\u00edch th\u01b0\u1edbc, lo\u1ea1i \u0111\u1ea7u d\u00f2 v\u00e0 m\u00f4i tr\u01b0\u1eddng ki\u1ec3m tra.<\/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 \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh s\u00f3ng \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c lo\u1ea1i \u0111\u1ea7u d\u00f2 kh\u00e1c nhau l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 si\u00eau \u00e2m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si\u00eau \u00e2m \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng ngh\u1ec7 thi\u1ebft y\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Trung t\u00e2m c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y 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 s\u00f3ng \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o<\/p>\n","protected":false},"author":1,"featured_media":264,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-53434","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\/53434","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=53434"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/53434\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/264"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=53434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=53434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=53434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}