{"id":53995,"date":"2022-09-01T19:21:36","date_gmt":"2022-09-02T00:21:36","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/things-you-need-to-know-about-ultrasonic-transducers\/"},"modified":"2025-01-21T07:26:19","modified_gmt":"2025-01-21T12:26:19","slug":"things-you-need-to-know-about-ultrasonic-transducers","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/things-you-need-to-know-about-ultrasonic-transducers\/","title":{"rendered":"\u0110i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m"},"content":{"rendered":"<p>\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Hi\u1ec3u r\u00f5 v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i \u0111\u1ea7u d\u00f2 v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p s\u1ebd gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng si\u00eau \u00e2m. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd cung c\u1ea5p nh\u1eefng ki\u1ebfn th\u1ee9c c\u1ea7n thi\u1ebft v\u1ec1 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m<\/h3>\n<p>\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n.  Khi \u00e1p m\u1ed9t \u0111i\u1ec7n \u00e1p v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng v\u00e0 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m. Ng\u01b0\u1ee3c l\u1ea1i, khi s\u00f3ng si\u00eau \u00e2m t\u00e1c \u0111\u1ed9ng v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p. Qu\u00e1 tr\u00ecnh n\u00e0y cho ph\u00e9p \u0111\u1ea7u d\u00f2 v\u1eeba ph\u00e1t ra s\u00f3ng si\u00eau \u00e2m, v\u1eeba thu nh\u1eadn t\u00edn hi\u1ec7u ph\u1ea3n h\u1ed3i.<\/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 ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean t\u1ea7n s\u1ed1, h\u00ecnh d\u1ea1ng v\u00e0 \u1ee9ng d\u1ee5ng.<\/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 (MHz)<\/th>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ea7n s\u1ed1 cao<\/td>\n<td>&gt; 10 MHz<\/td>\n<td>Ki\u1ec3m tra b\u1ec1 m\u1eb7t, y t\u1ebf (si\u00eau \u00e2m thai nhi, m\u1ea1ch m\u00e1u)<\/td>\n<td>\u0110\u1ed9 ph\u00e2n gi\u1ea3i cao, \u0111\u1ed9 xuy\u00ean th\u1ea5u th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1 trung b\u00ecnh<\/td>\n<td>2-10 MHz<\/td>\n<td>Ki\u1ec3m tra khuy\u1ebft t\u1eadt v\u1eadt li\u1ec7u, y t\u1ebf (si\u00eau \u00e2m \u1ed5 b\u1ee5ng)<\/td>\n<td>\u0110\u1ed9 ph\u00e2n gi\u1ea3i v\u00e0 \u0111\u1ed9 xuy\u00ean th\u1ea5u trung b\u00ecnh<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1 th\u1ea5p<\/td>\n<td>&lt; 2 MHz<\/td>\n<td>Ki\u1ec3m tra v\u1eadt li\u1ec7u d\u00e0y, \u0111o \u0111\u1ed9 d\u00e0y<\/td>\n<td>\u0110\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p, \u0111\u1ed9 xuy\u00ean th\u1ea5u cao<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea7u d\u00f2 m\u1ea3ng pha<\/td>\n<td>Thay \u0111\u1ed5i<\/td>\n<td>Y t\u1ebf (si\u00eau \u00e2m tim, 3D\/4D)<\/td>\n<td>T\u1ea1o h\u00ecnh \u1ea3nh theo nhi\u1ec1u h\u01b0\u1edbng, \u0111i\u1ec1u khi\u1ec3n ch\u00f9m tia linh ho\u1ea1t<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea7u d\u00f2 \u0111\u01a1n tinh th\u1ec3<\/td>\n<td>Thay \u0111\u1ed5i<\/td>\n<td>Y t\u1ebf (si\u00eau \u00e2m t\u1ed5ng qu\u00e1t)<\/td>\n<td>\u0110\u1ed9 nh\u1ea1y cao, h\u00ecnh \u1ea3nh r\u00f5 n\u00e9t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>T\u1ea7n s\u1ed1 v\u00e0 \u0111\u1ed9 xuy\u00ean th\u1ea5u<\/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 v\u00e0 \u0111\u1ed9 xuy\u00ean th\u1ea5u c\u1ee7a s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 c\u00e0ng cao, \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u00e0ng t\u1ed1t nh\u01b0ng \u0111\u1ed9 xuy\u00ean th\u1ea5u c\u00e0ng k\u00e9m.  Ng\u01b0\u1ee3c l\u1ea1i, t\u1ea7n s\u1ed1 c\u00e0ng th\u1ea5p, \u0111\u1ed9 xuy\u00ean th\u1ea5u c\u00e0ng t\u1ed1t nh\u01b0ng \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u00e0ng k\u00e9m.<\/p>\n<h3>L\u1ef1a ch\u1ecdn \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m ph\u00f9 h\u1ee3p<\/h3>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ea7u d\u00f2 ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. C\u1ea7n xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 v\u1eadt li\u1ec7u c\u1ea7n ki\u1ec3m tra, \u0111\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u, \u0111\u1ed9 ph\u00e2n gi\u1ea3i y\u00eau c\u1ea7u v\u00e0 \u0111\u1ed9 s\u00e2u c\u1ea7n ki\u1ec3m tra. V\u00ed d\u1ee5, n\u1ebfu c\u1ea7n ki\u1ec3m tra khuy\u1ebft t\u1eadt b\u00ean trong m\u1ed9t kh\u1ed1i kim lo\u1ea1i d\u00e0y, c\u1ea7n s\u1eed d\u1ee5ng \u0111\u1ea7u d\u00f2 t\u1ea7n s\u1ed1 th\u1ea5p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u00f3ng si\u00eau \u00e2m c\u00f3 th\u1ec3 xuy\u00ean qua v\u1eadt li\u1ec7u.  N\u1ebfu c\u1ea7n ki\u1ec3m tra m\u1ea1ch m\u00e1u nh\u1ecf, c\u1ea7n s\u1eed d\u1ee5ng \u0111\u1ea7u d\u00f2 t\u1ea7n s\u1ed1 cao \u0111\u1ec3 c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i t\u1ed1t.<\/p>\n<h3>V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/h3>\n<p>V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m.  C\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn bao g\u1ed3m g\u1ed1m PZT (ch\u00ec zirconat titanat), PVDF (polyvinylidene fluoride) v\u00e0 c\u00e1c v\u1eadt li\u1ec7u composite.  M\u1ed7i lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 nh\u1eefng \u0111\u1eb7c t\u00ednh ri\u00eang bi\u1ec7t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a \u0111\u1ea7u d\u00f2.<\/p>\n<h3>Ch\u0103m s\u00f3c v\u00e0 b\u1ea3o qu\u1ea3n \u0111\u1ea7u d\u00f2<\/h3>\n<p>\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m l\u00e0 thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n c\u1ea9n th\u1eadn. Tr\u00e1nh va \u0111\u1eadp, ti\u1ebfp x\u00fac v\u1edbi h\u00f3a ch\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao.  V\u1ec7 sinh \u0111\u1ea7u d\u00f2 sau m\u1ed7i l\u1ea7n s\u1eed d\u1ee5ng b\u1eb1ng dung d\u1ecbch v\u1ec7 sinh chuy\u00ean d\u1ee5ng.<\/p>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt c\u1ee7a \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c trong c\u00e1c \u1ee9ng d\u1ee5ng si\u00eau \u00e2m.  L\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i \u0111\u1ea7u d\u00f2, t\u1ea7n s\u1ed1 v\u00e0 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o qu\u1ea3n ph\u00f9 h\u1ee3p s\u1ebd gi\u00fap k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Hi\u1ec3u r\u00f5 v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i \u0111\u1ea7u d\u00f2 v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p s\u1ebd gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng si\u00eau \u00e2m. B\u00e0i vi\u1ebft<\/p>\n","protected":false},"author":1,"featured_media":18821,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-53995","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\/53995","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=53995"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/53995\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/18821"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=53995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=53995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=53995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}