{"id":47580,"date":"2023-04-22T00:10:32","date_gmt":"2023-04-22T05:10:32","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-ultrasonic-sound-device\/"},"modified":"2025-01-21T07:20:34","modified_gmt":"2025-01-21T12:20:34","slug":"how-to-make-ultrasonic-sound-device","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-make-ultrasonic-sound-device\/","title":{"rendered":"T\u1ef1 ch\u1ebf thi\u1ebft b\u1ecb t\u1ea1o \u00e2m thanh si\u00eau \u00e2m"},"content":{"rendered":"

\u00c2m thanh si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, c\u00f3 r\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u00fa v\u1ecb v\u00e0 thi\u1ebft th\u1ef1c, t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn c\u1ea3 trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m \u0111\u01a1n gi\u1ea3n kh\u00f4ng qu\u00e1 kh\u00f3 kh\u0103n n\u1ebfu b\u1ea1n n\u1eafm v\u1eefng nguy\u00ean l\u00fd c\u01a1 b\u1ea3n v\u00e0 c\u00f3 m\u1ed9t ch\u00fat ki\u1ebfn th\u1ee9c v\u1ec1 \u0111i\u1ec7n t\u1eed. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch ch\u1ebf t\u1ea1o m\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m \u0111\u01a1n gi\u1ea3n.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m<\/h3>\n

Thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. M\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u, nh\u01b0 th\u1ea1ch anh ho\u1eb7c g\u1ed1m \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 dao \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. N\u1ebfu t\u1ea7n s\u1ed1 n\u00e0y n\u1eb1m trong v\u00f9ng si\u00eau \u00e2m (tr\u00ean 20kHz), ta s\u1ebd t\u1ea1o ra \u0111\u01b0\u1ee3c s\u00f3ng si\u00eau \u00e2m.<\/p>\n

Linh ki\u1ec7n c\u1ea7n thi\u1ebft<\/h3>\n

\u0110\u1ec3 ch\u1ebf t\u1ea1o m\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m \u0111\u01a1n gi\u1ea3n, b\u1ea1n c\u1ea7n chu\u1ea9n b\u1ecb nh\u1eefng linh ki\u1ec7n sau:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Linh ki\u1ec7n<\/th>\nM\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
B\u1ed9 ph\u00e1t si\u00eau \u00e2m (transducer)<\/td>\nCh\u1ecdn lo\u1ea1i c\u00f3 t\u1ea7n s\u1ed1 mong mu\u1ed1n (v\u00ed d\u1ee5: 40kHz).<\/td>\n<\/tr>\n
Ngu\u1ed3n \u0111i\u1ec7n<\/td>\nC\u00f3 th\u1ec3 s\u1eed d\u1ee5ng pin 9V ho\u1eb7c ngu\u1ed3n \u0111i\u1ec7n DC t\u01b0\u01a1ng \u1ee9ng v\u1edbi \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 ph\u00e1t.<\/td>\n<\/tr>\n
\u0110i\u1ec7n tr\u1edf<\/td>\nD\u00f9ng \u0111\u1ec3 h\u1ea1n ch\u1ebf d\u00f2ng \u0111i\u1ec7n qua b\u1ed9 ph\u00e1t. Gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o b\u1ed9 ph\u00e1t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/td>\n<\/tr>\n
T\u1ee5 \u0111i\u1ec7n<\/td>\nD\u00f9ng \u0111\u1ec3 l\u1ecdc nhi\u1ec5u v\u00e0 \u1ed5n \u0111\u1ecbnh t\u00edn hi\u1ec7u.<\/td>\n<\/tr>\n
N\u00fat nh\u1ea5n<\/td>\nD\u00f9ng \u0111\u1ec3 b\u1eadt\/t\u1eaft thi\u1ebft b\u1ecb.<\/td>\n<\/tr>\n
M\u1ea1ch dao \u0111\u1ed9ng<\/td>\nS\u1eed d\u1ee5ng m\u1ea1ch NE555 ho\u1eb7c m\u1ea1ch t\u01b0\u01a1ng t\u1ef1 \u0111\u1ec3 t\u1ea1o t\u00edn hi\u1ec7u xoay chi\u1ec1u v\u1edbi t\u1ea7n s\u1ed1 mong mu\u1ed1n.<\/td>\n<\/tr>\n
D\u00e2y n\u1ed1i, b\u1ea3ng m\u1ea1ch<\/td>\n\u0110\u1ec3 k\u1ebft n\u1ed1i c\u00e1c linh ki\u1ec7n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n<\/h3>\n

S\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n cho thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m kh\u00e1 \u0111\u01a1n gi\u1ea3n. T\u00edn hi\u1ec7u t\u1eeb m\u1ea1ch dao \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1ed9 ph\u00e1t si\u00eau \u00e2m th\u00f4ng qua m\u1ed9t \u0111i\u1ec7n tr\u1edf h\u1ea1n d\u00f2ng. T\u1ee5 \u0111i\u1ec7n \u0111\u01b0\u1ee3c m\u1eafc song song v\u1edbi ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ec3 l\u1ecdc nhi\u1ec5u. N\u00fat nh\u1ea5n \u0111\u01b0\u1ee3c m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ch.<\/p>\n

Quy tr\u00ecnh l\u1eafp r\u00e1p<\/h3>\n
    \n
  1. K\u1ebft n\u1ed1i b\u1ed9 ph\u00e1t si\u00eau \u00e2m v\u1edbi \u0111i\u1ec7n tr\u1edf h\u1ea1n d\u00f2ng.<\/li>\n
  2. N\u1ed1i \u0111i\u1ec7n tr\u1edf v\u1edbi ng\u00f5 ra c\u1ee7a m\u1ea1ch dao \u0111\u1ed9ng.<\/li>\n
  3. K\u1ebft n\u1ed1i ngu\u1ed3n \u0111i\u1ec7n v\u1edbi m\u1ea1ch dao \u0111\u1ed9ng v\u00e0 b\u1ed9 ph\u00e1t.<\/li>\n
  4. M\u1eafc t\u1ee5 \u0111i\u1ec7n song song v\u1edbi ngu\u1ed3n \u0111i\u1ec7n.<\/li>\n
  5. N\u1ed1i n\u00fat nh\u1ea5n v\u1edbi ngu\u1ed3n \u0111i\u1ec7n.<\/li>\n
  6. Ki\u1ec3m tra l\u1ea1i c\u00e1c k\u1ebft n\u1ed1i tr\u01b0\u1edbc khi c\u1ea5p ngu\u1ed3n.<\/li>\n<\/ol>\n

    Ki\u1ec3m tra v\u00e0 hi\u1ec7u ch\u1ec9nh<\/h3>\n

    Sau khi l\u1eafp r\u00e1p xong, b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra thi\u1ebft b\u1ecb b\u1eb1ng c\u00e1ch c\u1ea5p ngu\u1ed3n v\u00e0 s\u1eed d\u1ee5ng m\u1ed9t micro si\u00eau \u00e2m ho\u1eb7c \u1ee9ng d\u1ee5ng \u0111o t\u1ea7n s\u1ed1 tr\u00ean \u0111i\u1ec7n tho\u1ea1i \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem thi\u1ebft b\u1ecb c\u00f3 ph\u00e1t ra s\u00f3ng si\u00eau \u00e2m hay kh\u00f4ng. N\u1ebfu c\u1ea7n thi\u1ebft, b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec7u ch\u1ec9nh t\u1ea7n s\u1ed1 b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c linh ki\u1ec7n trong m\u1ea1ch dao \u0111\u1ed9ng.<\/p>\n

    \u1ee8ng d\u1ee5ng c\u1ee7a thi\u1ebft b\u1ecb<\/h3>\n

    Thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m t\u1ef1 ch\u1ebf c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong m\u1ed9t s\u1ed1 d\u1ef1 \u00e1n nh\u1ecf, v\u00ed d\u1ee5 nh\u01b0 l\u00e0m m\u00e1y \u0111u\u1ed5i c\u00f4n tr\u00f9ng, c\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch, ho\u1eb7c th\u00ed nghi\u1ec7m v\u1ec1 s\u00f3ng si\u00eau \u00e2m.<\/p>\n

    Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m kh\u00f4ng ch\u1ec9 gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 m\u00e0 c\u00f2n mang l\u1ea1i s\u1ef1 th\u00fa v\u1ecb trong qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n. Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd l\u1ef1a ch\u1ecdn linh ki\u1ec7n ph\u00f9 h\u1ee3p v\u00e0 c\u1ea9n th\u1eadn trong qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u00c2m thanh si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, c\u00f3 r\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u00fa v\u1ecb v\u00e0 thi\u1ebft th\u1ef1c, t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn c\u1ea3 trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t si\u00eau \u00e2m \u0111\u01a1n gi\u1ea3n kh\u00f4ng qu\u00e1 kh\u00f3 kh\u0103n n\u1ebfu b\u1ea1n n\u1eafm<\/p>\n","protected":false},"author":1,"featured_media":26476,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-47580","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\/47580","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=47580"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/47580\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26476"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=47580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=47580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=47580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}