{"id":49356,"date":"2023-04-21T22:21:52","date_gmt":"2023-04-22T03:21:52","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-generate-ultrasonic-waves-at-home\/"},"modified":"2025-01-21T07:16:11","modified_gmt":"2025-01-21T12:16:11","slug":"how-to-generate-ultrasonic-waves-at-home","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-generate-ultrasonic-waves-at-home\/","title":{"rendered":"T\u1ef1 t\u1ea1o s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft"},"content":{"rendered":"<p>Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0 nghe c\u00f3 v\u1ebb ph\u1ee9c t\u1ea1p, nh\u01b0ng th\u1ef1c t\u1ebf l\u1ea1i c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c v\u1edbi m\u1ed9t s\u1ed1 linh ki\u1ec7n \u0111i\u1ec7n t\u1eed c\u01a1 b\u1ea3n v\u00e0 m\u1ed9t ch\u00fat ki\u1ebfn th\u1ee9c. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0 m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m<\/h3>\n<p>S\u00f3ng si\u00eau \u00e2m l\u00e0 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 tr\u00ean 20kHz. Ch\u00fang \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, c\u00f3 kh\u1ea3 n\u0103ng 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 rung \u0111\u1ed9ng, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.  Khi \u00e1p m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 t\u01b0\u01a1ng \u1ee9ng, t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n<h3>Linh ki\u1ec7n c\u1ea7n thi\u1ebft<\/h3>\n<p>\u0110\u1ec3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0, b\u1ea1n c\u1ea7n chu\u1ea9n b\u1ecb nh\u1eefng linh ki\u1ec7n sau:<\/p>\n<ul>\n<li><strong>B\u1ed9 ph\u00e1t si\u00eau \u00e2m:<\/strong> \u0110\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng nh\u1ea5t, th\u01b0\u1eddng l\u00e0 m\u1ed9t \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n.  B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm mua ch\u00fang tr\u00ean c\u00e1c trang th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed ho\u1eb7c c\u1eeda h\u00e0ng linh ki\u1ec7n \u0111i\u1ec7n t\u1eed.<\/li>\n<li><strong>B\u1ed9 dao \u0111\u1ed9ng:<\/strong>  B\u1ed9 dao \u0111\u1ed9ng t\u1ea1o ra t\u00edn hi\u1ec7u \u0111i\u1ec7n xoay chi\u1ec1u v\u1edbi t\u1ea7n s\u1ed1 mong mu\u1ed1n \u0111\u1ec3 k\u00edch ho\u1ea1t b\u1ed9 ph\u00e1t si\u00eau \u00e2m.  C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng IC 555 ho\u1eb7c c\u00e1c m\u1ea1ch dao \u0111\u1ed9ng kh\u00e1c.<\/li>\n<li><strong>Ngu\u1ed3n \u0111i\u1ec7n:<\/strong>  Cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho m\u1ea1ch \u0111i\u1ec7n.  B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n DC t\u1eeb 5V \u0111\u1ebfn 12V t\u00f9y thu\u1ed9c v\u00e0o b\u1ed9 ph\u00e1t si\u00eau \u00e2m.<\/li>\n<li><strong>C\u00e1c linh ki\u1ec7n ph\u1ee5 kh\u00e1c:<\/strong> T\u1ee5 \u0111i\u1ec7n, \u0111i\u1ec7n tr\u1edf, d\u00e2y n\u1ed1i, b\u1ea3ng m\u1ea1ch.<\/li>\n<\/ul>\n<h3>L\u1eafp r\u00e1p m\u1ea1ch \u0111i\u1ec7n<\/h3>\n<p>Sau khi \u0111\u00e3 chu\u1ea9n b\u1ecb \u0111\u1ea7y \u0111\u1ee7 linh ki\u1ec7n, b\u1ea1n c\u1ea7n l\u1eafp r\u00e1p ch\u00fang theo s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n.  S\u01a1 \u0111\u1ed3 m\u1ea1ch c\u01a1 b\u1ea3n bao g\u1ed3m b\u1ed9 dao \u0111\u1ed9ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi b\u1ed9 ph\u00e1t si\u00eau \u00e2m.  T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh b\u1edfi c\u00e1c linh ki\u1ec7n trong m\u1ea1ch dao \u0111\u1ed9ng.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Linh ki\u1ec7n<\/th>\n<th>Ch\u1ee9c n\u0103ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>B\u1ed9 ph\u00e1t si\u00eau \u00e2m<\/td>\n<td>Bi\u1ebfn \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh s\u00f3ng si\u00eau \u00e2m<\/td>\n<\/tr>\n<tr>\n<td>B\u1ed9 dao \u0111\u1ed9ng<\/td>\n<td>T\u1ea1o t\u00edn hi\u1ec7u \u0111i\u1ec7n xoay chi\u1ec1u<\/td>\n<\/tr>\n<tr>\n<td>T\u1ee5 \u0111i\u1ec7n<\/td>\n<td>L\u1ecdc nhi\u1ec5u, \u1ed5n \u0111\u1ecbnh t\u00edn hi\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec7n tr\u1edf<\/td>\n<td>\u0110i\u1ec1u ch\u1ec9nh d\u00f2ng \u0111i\u1ec7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<p>Sau khi l\u1eafp r\u00e1p xong m\u1ea1ch, b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t microphone si\u00eau \u00e2m ho\u1eb7c m\u1ed9t \u1ee9ng d\u1ee5ng tr\u00ean \u0111i\u1ec7n tho\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n s\u00f3ng si\u00eau \u00e2m.  L\u01b0u \u00fd r\u1eb1ng tai ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 nghe \u0111\u01b0\u1ee3c s\u00f3ng si\u00eau \u00e2m.<\/p>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m t\u1ef1 ch\u1ebf<\/h3>\n<p>M\u1eb7c d\u00f9 s\u00f3ng si\u00eau \u00e2m t\u1ef1 ch\u1ebf c\u00f3 c\u00f4ng su\u1ea5t th\u1ea5p, b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ch\u00fang cho m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng \u0111\u01a1n gi\u1ea3n nh\u01b0:<\/p>\n<ul>\n<li>\u0110o kho\u1ea3ng c\u00e1ch: B\u1eb1ng c\u00e1ch \u0111o th\u1eddi gian s\u00f3ng si\u00eau \u00e2m truy\u1ec1n \u0111i v\u00e0 ph\u1ea3n x\u1ea1 l\u1ea1i, b\u1ea1n c\u00f3 th\u1ec3 t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch \u0111\u1ebfn v\u1eadt c\u1ea3n.<\/li>\n<li>Xua \u0111u\u1ed5i c\u00f4n tr\u00f9ng: M\u1ed9t s\u1ed1 lo\u00e0i c\u00f4n tr\u00f9ng nh\u1ea1y c\u1ea3m v\u1edbi s\u00f3ng si\u00eau \u00e2m.<\/li>\n<li>Th\u00ed nghi\u1ec7m khoa h\u1ecdc: T\u00ecm hi\u1ec3u v\u1ec1 t\u00ednh ch\u1ea5t c\u1ee7a s\u00f3ng si\u00eau \u00e2m.<\/li>\n<\/ul>\n<p>Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0 \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c v\u1ec1 \u0111i\u1ec7n t\u1eed.  H\u00e3y c\u1ea9n th\u1eadn khi l\u00e0m vi\u1ec7c v\u1edbi \u0111i\u1ec7n v\u00e0 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh an to\u00e0n.  Kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng s\u00f3ng si\u00eau \u00e2m t\u1ef1 ch\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng y t\u1ebf ho\u1eb7c c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi c\u00f4ng su\u1ea5t cao.  \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng chuy\u00ean nghi\u1ec7p, n\u00ean s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb si\u00eau \u00e2m chuy\u00ean d\u1ee5ng, v\u00ed d\u1ee5 nh\u01b0 c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a Beijing Ultrasonic n\u1ebfu c\u1ea7n thi\u1ebft cho \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 v\u00e0 y\u00eau c\u1ea7u \u0111\u1ed9 ch\u00ednh x\u00e1c cao.<\/p>\n<p>Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0 l\u00e0 m\u1ed9t d\u1ef1 \u00e1n th\u00fa v\u1ecb v\u00e0 b\u1ed5 \u00edch, gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u00f3ng \u00e2m v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3.  Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 cung c\u1ea5p cho b\u1ea1n nh\u1eefng th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1eaft \u0111\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0 nghe c\u00f3 v\u1ebb ph\u1ee9c t\u1ea1p, nh\u01b0ng th\u1ef1c t\u1ebf l\u1ea1i c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c v\u1edbi m\u1ed9t s\u1ed1 linh ki\u1ec7n \u0111i\u1ec7n t\u1eed c\u01a1 b\u1ea3n v\u00e0 m\u1ed9t ch\u00fat ki\u1ebfn th\u1ee9c. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m t\u1ea1i nh\u00e0 m\u1ed9t c\u00e1ch an to\u00e0n<\/p>\n","protected":false},"author":1,"featured_media":26474,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-49356","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\/49356","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=49356"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/49356\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26474"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=49356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=49356"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=49356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}