{"id":44684,"date":"2023-04-25T14:29:35","date_gmt":"2023-04-25T19:29:35","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-ultrasonic-wave\/"},"modified":"2025-01-21T07:29:49","modified_gmt":"2025-01-21T12:29:49","slug":"what-is-ultrasonic-wave","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-ultrasonic-wave\/","title":{"rendered":"S\u00f3ng si\u00eau \u00e2m: Kh\u00e1m ph\u00e1 b\u1ea3n ch\u1ea5t v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<p>S\u00f3ng si\u00eau \u00e2m l\u00e0 m\u1ed9t lo\u1ea1i s\u00f3ng \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 cao h\u01a1n ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u t\u1eeb 20 kHz tr\u1edf l\u00ean. M\u1eb7c d\u00f9 tai ch\u00fang ta kh\u00f4ng th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c, s\u00f3ng si\u00eau \u00e2m l\u1ea1i c\u00f3 r\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong khoa h\u1ecdc, k\u1ef9 thu\u1eadt, y t\u1ebf v\u00e0 \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y.  Vi\u1ec7c t\u00ecm hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a s\u00f3ng si\u00eau \u00e2m s\u1ebd gi\u00fap ch\u00fang ta hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ti\u1ec1m n\u0103ng v\u00e0 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i c\u1ee7a n\u00f3.<\/p>\n<h3>T\u1ea7n s\u1ed1 v\u00e0 D\u1ea3i t\u1ea7n s\u1ed1 c\u1ee7a S\u00f3ng Si\u00eau \u00e2m<\/h3>\n<p>T\u1ea7n s\u1ed1 l\u00e0 m\u1ed9t trong nh\u1eefng \u0111\u1eb7c tr\u01b0ng quan tr\u1ecdng nh\u1ea5t c\u1ee7a s\u00f3ng si\u00eau \u00e2m.  N\u00f3 \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng Hertz (Hz) v\u00e0 \u0111\u1ea1i di\u1ec7n cho s\u1ed1 chu k\u1ef3 s\u00f3ng di\u1ec5n ra trong m\u1ed9t gi\u00e2y.  S\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo d\u1ea3i t\u1ea7n s\u1ed1, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>S\u00f3ng si\u00eau \u00e2m t\u1ea7n s\u1ed1 th\u1ea5p (20 kHz &#8211; 100 kHz):<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng l\u00e0m s\u1ea1ch, h\u00e0n si\u00eau \u00e2m v\u00e0 x\u1eed l\u00fd v\u1eadt li\u1ec7u.<\/li>\n<li><strong>S\u00f3ng si\u00eau \u00e2m t\u1ea7n s\u1ed1 trung b\u00ecnh (100 kHz &#8211; 1 MHz):<\/strong> \u1ee8ng d\u1ee5ng trong ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y, \u0111o kho\u1ea3ng c\u00e1ch v\u00e0 h\u00ecnh \u1ea3nh y t\u1ebf.<\/li>\n<li><strong>S\u00f3ng si\u00eau \u00e2m t\u1ea7n s\u1ed1 cao (1 MHz &#8211; 10 MHz):<\/strong> Ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u00ecnh \u1ea3nh y t\u1ebf c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao, vi ph\u1eabu thu\u1eadt v\u00e0 nghi\u00ean c\u1ee9u khoa h\u1ecdc.<\/li>\n<\/ul>\n<h3>C\u01a1 ch\u1ebf lan truy\u1ec1n c\u1ee7a S\u00f3ng Si\u00eau \u00e2m<\/h3>\n<p>Gi\u1ed1ng nh\u01b0 s\u00f3ng \u00e2m thanh th\u00f4ng th\u01b0\u1eddng, s\u00f3ng si\u00eau \u00e2m c\u1ea7n m\u00f4i tr\u01b0\u1eddng v\u1eadt ch\u1ea5t \u0111\u1ec3 lan truy\u1ec1n.  Ch\u00fang kh\u00f4ng th\u1ec3 truy\u1ec1n trong ch\u00e2n kh\u00f4ng. T\u1ed1c \u0111\u1ed9 lan truy\u1ec1n c\u1ee7a s\u00f3ng si\u00eau \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o m\u1eadt \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u0111\u00e0n h\u1ed3i c\u1ee7a m\u00f4i tr\u01b0\u1eddng. Trong kh\u00f4ng kh\u00ed, t\u1ed1c \u0111\u1ed9 n\u00e0y kho\u1ea3ng 343 m\/s, trong khi trong n\u01b0\u1edbc, n\u00f3 c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi 1500 m\/s.<\/p>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a S\u00f3ng Si\u00eau \u00e2m<\/h3>\n<p>S\u00f3ng si\u00eau \u00e2m c\u00f3 m\u1ed9t lo\u1ea1t c\u00e1c \u1ee9ng d\u1ee5ng \u0111a d\u1ea1ng, bao g\u1ed3m:<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>L\u0129nh v\u1ef1c<\/th>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>M\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Y t\u1ebf<\/td>\n<td>Ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh<\/td>\n<td>Si\u00eau \u00e2m thai, si\u00eau \u00e2m tim, si\u00eau \u00e2m b\u1ee5ng<\/td>\n<\/tr>\n<tr>\n<td>Y t\u1ebf<\/td>\n<td>\u0110i\u1ec1u tr\u1ecb<\/td>\n<td>Ph\u1eabu thu\u1eadt si\u00eau \u00e2m, v\u1eadt l\u00fd tr\u1ecb li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>C\u00f4ng nghi\u1ec7p<\/td>\n<td>L\u00e0m s\u1ea1ch<\/td>\n<td>L\u00e0m s\u1ea1ch c\u00e1c chi ti\u1ebft m\u00e1y m\u00f3c, \u0111\u1ed3 trang s\u1ee9c<\/td>\n<\/tr>\n<tr>\n<td>C\u00f4ng nghi\u1ec7p<\/td>\n<td>H\u00e0n<\/td>\n<td>H\u00e0n nh\u1ef1a, kim lo\u1ea1i<\/td>\n<\/tr>\n<tr>\n<td>C\u00f4ng nghi\u1ec7p<\/td>\n<td>Ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y<\/td>\n<td>Ph\u00e1t hi\u1ec7n khuy\u1ebft t\u1eadt trong v\u1eadt li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>H\u00e0ng h\u1ea3i<\/td>\n<td>Sonar<\/td>\n<td>\u0110\u1ecbnh v\u1ecb, \u0111o \u0111\u1ed9 s\u00e2u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>T\u1ea1o ra S\u00f3ng Si\u00eau \u00e2m<\/h3>\n<p>S\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb g\u1ecdi l\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m, th\u01b0\u1eddng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n.  C\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n nh\u01b0 th\u1ea1ch anh ho\u1eb7c g\u1ed1m s\u1ebd bi\u1ebfn \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 dao \u0111\u1ed9ng, t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n<h3>Nh\u1eefng l\u01b0u \u00fd khi s\u1eed d\u1ee5ng S\u00f3ng Si\u00eau \u00e2m<\/h3>\n<p>M\u1eb7c d\u00f9 s\u00f3ng si\u00eau \u00e2m c\u00f3 nhi\u1ec1u l\u1ee3i \u00edch, c\u1ea7n l\u01b0u \u00fd m\u1ed9t s\u1ed1 \u0111i\u1ec3m khi s\u1eed d\u1ee5ng:<\/p>\n<ul>\n<li><strong>C\u01b0\u1eddng \u0111\u1ed9 cao:<\/strong> S\u00f3ng si\u00eau \u00e2m c\u01b0\u1eddng \u0111\u1ed9 cao c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng cavitation, t\u1ea1o ra c\u00e1c bong b\u00f3ng kh\u00ed nh\u1ecf trong ch\u1ea5t l\u1ecfng.  \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n h\u1ea1i cho m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u.<\/li>\n<li><strong>An to\u00e0n:<\/strong> Trong y t\u1ebf, vi\u1ec7c s\u1eed d\u1ee5ng s\u00f3ng si\u00eau \u00e2m c\u1ea7n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi c\u00e1c chuy\u00ean gia \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o \u0111\u1ec3 tr\u00e1nh t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn s\u1ee9c kh\u1ecfe.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, s\u00f3ng si\u00eau \u00e2m l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u0111a n\u0103ng v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng.  T\u1eeb ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh y t\u1ebf \u0111\u1ebfn h\u00e0n c\u00f4ng nghi\u1ec7p v\u00e0 l\u00e0m s\u1ea1ch, s\u00f3ng si\u00eau \u00e2m \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng g\u00f3p \u0111\u00e1ng k\u1ec3 v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a khoa h\u1ecdc k\u1ef9 thu\u1eadt v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c s\u1ed1ng. Vi\u1ec7c ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00f4ng ngh\u1ec7 si\u00eau \u00e2m h\u1ee9a h\u1eb9n s\u1ebd mang l\u1ea1i nhi\u1ec1u \u1ee9ng d\u1ee5ng \u0111\u1ed9t ph\u00e1 h\u01a1n n\u1eefa trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S\u00f3ng si\u00eau \u00e2m l\u00e0 m\u1ed9t lo\u1ea1i s\u00f3ng \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 cao h\u01a1n ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u t\u1eeb 20 kHz tr\u1edf l\u00ean. M\u1eb7c d\u00f9 tai ch\u00fang ta kh\u00f4ng th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c, s\u00f3ng si\u00eau \u00e2m l\u1ea1i c\u00f3 r\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong khoa h\u1ecdc, k\u1ef9 thu\u1eadt, y t\u1ebf<\/p>\n","protected":false},"author":1,"featured_media":26469,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-44684","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\/44684","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=44684"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44684\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26469"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=44684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}