{"id":49364,"date":"2023-04-21T22:21:30","date_gmt":"2023-04-22T03:21:30","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-generate-ultrasonic-waves\/"},"modified":"2025-01-21T07:16:10","modified_gmt":"2025-01-21T12:16:10","slug":"how-to-generate-ultrasonic-waves","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-generate-ultrasonic-waves\/","title":{"rendered":"Ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o s\u00f3ng si\u00eau \u00e2m hi\u1ec7u qu\u1ea3"},"content":{"rendered":"<p>S\u00f3ng si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (tr\u00ean 20kHz), \u0111\u00e3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i 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. Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m hi\u1ec7u qu\u1ea3 v\u00e0 ch\u00ednh x\u00e1c \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng n\u00e0y. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd tr\u00ecnh b\u00e0y chi ti\u1ebft v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n<h3>Nguy\u00ean l\u00fd t\u1ea1o s\u00f3ng si\u00eau \u00e2m<\/h3>\n<p>S\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ho\u1eb7c hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o. Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u (nh\u01b0 th\u1ea1ch anh, g\u1ed1m \u00e1p \u0111i\u1ec7n) bi\u1ebfn \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. Hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o l\u00e0 s\u1ef1 thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u s\u1eaft t\u1eeb d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1eeb tr\u01b0\u1eddng.<\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p \u00e1p \u0111i\u1ec7n<\/h3>\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng c\u00e1c tinh th\u1ec3 \u00e1p \u0111i\u1ec7n, th\u01b0\u1eddng l\u00e0 g\u1ed1m \u00e1p \u0111i\u1ec7n, \u0111\u01b0\u1ee3c \u0111\u1eb7t gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. Khi m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u c\u00f3 t\u1ea7n s\u1ed1 si\u00eau \u00e2m \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o hai \u0111i\u1ec7n c\u1ef1c, tinh th\u1ec3 s\u1ebd dao \u0111\u1ed9ng v\u1edbi c\u00f9ng t\u1ea7n s\u1ed1, t\u1ea1o ra 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 xoay chi\u1ec1u.<\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p t\u1eeb gi\u1ea3o<\/h3>\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u s\u1eaft t\u1eeb \u0111\u1eb7t trong m\u1ed9t cu\u1ed9n d\u00e2y. Khi d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 t\u1ea7n s\u1ed1 si\u00eau \u00e2m ch\u1ea1y qua cu\u1ed9n d\u00e2y, n\u00f3 t\u1ea1o ra m\u1ed9t t\u1eeb tr\u01b0\u1eddng xoay chi\u1ec1u. T\u1eeb tr\u01b0\u1eddng n\u00e0y l\u00e0m thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u s\u1eaft t\u1eeb, t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.  Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea1o s\u00f3ng si\u00eau \u00e2m c\u00f4ng su\u1ea5t l\u1edbn.<\/p>\n<h3>So s\u00e1nh hai ph\u01b0\u01a1ng ph\u00e1p<\/h3>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th>Ph\u01b0\u01a1ng ph\u00e1p \u00e1p \u0111i\u1ec7n<\/th>\n<th>Ph\u01b0\u01a1ng ph\u00e1p t\u1eeb gi\u1ea3o<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ea7n s\u1ed1<\/td>\n<td>R\u1ed9ng, d\u1ec5 \u0111i\u1ec1u ch\u1ec9nh<\/td>\n<td>H\u1ea1n ch\u1ebf h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>Hi\u1ec7u su\u1ea5t<\/td>\n<td>Cao<\/td>\n<td>Th\u1ea5p h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>C\u00f4ng su\u1ea5t<\/td>\n<td>Th\u1ea5p \u0111\u1ebfn trung b\u00ecnh<\/td>\n<td>Cao<\/td>\n<\/tr>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc<\/td>\n<td>Nh\u1ecf g\u1ecdn<\/td>\n<td>L\u1edbn h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>\u1ee8ng d\u1ee5ng<\/td>\n<td>Y t\u1ebf, ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y<\/td>\n<td>L\u00e0m s\u1ea1ch si\u00eau \u00e2m c\u00f4ng nghi\u1ec7p, gia c\u00f4ng v\u1eadt li\u1ec7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ea1o s\u00f3ng si\u00eau \u00e2m<\/h3>\n<p>Hi\u1ec7u su\u1ea5t t\u1ea1o s\u00f3ng si\u00eau \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Ch\u1ea5t li\u1ec7u:<\/strong>  \u0110\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n ho\u1eb7c t\u1eeb gi\u1ea3o \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u su\u1ea5t chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng.<\/li>\n<li><strong>T\u1ea7n s\u1ed1:<\/strong> T\u1ea7n s\u1ed1 s\u00f3ng si\u00eau \u00e2m c\u00e0ng cao th\u00ec vi\u1ec7c t\u1ea1o ra s\u00f3ng c\u00e0ng kh\u00f3 kh\u0103n.<\/li>\n<li><strong>Thi\u1ebft k\u1ebf:<\/strong>  H\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a b\u1ed9 t\u1ea1o s\u00f3ng c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/li>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9:<\/strong> Nhi\u1ec7t \u0111\u1ed9 cao c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 t\u1ea1o s\u00f3ng.<\/li>\n<\/ul>\n<p>Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p, \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 c\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd v\u00e0 k\u1ef9 thu\u1eadt.  L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ph\u00f9 h\u1ee3p v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t cao nh\u1ea5t trong c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.  S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 v\u1eadt li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1eed \u0111ang m\u1edf ra nh\u1eefng tri\u1ec3n v\u1ecdng m\u1edbi cho vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m v\u1edbi hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c ng\u00e0y c\u00e0ng cao, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng \u0111a d\u1ea1ng c\u1ee7a c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00e0 khoa h\u1ecdc.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S\u00f3ng si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (tr\u00ean 20kHz), \u0111\u00e3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i 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. Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m hi\u1ec7u qu\u1ea3 v\u00e0 ch\u00ednh x\u00e1c \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c<\/p>\n","protected":false},"author":1,"featured_media":26471,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-49364","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\/49364","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=49364"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/49364\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26471"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=49364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=49364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=49364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}