{"id":43621,"date":"2024-04-11T11:19:04","date_gmt":"2024-04-11T16:19:04","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/from-electricity-to-sound-how-ultrasonic-generators-produce-high-frequency-vibrations\/"},"modified":"2025-01-21T07:10:50","modified_gmt":"2025-01-21T12:10:50","slug":"from-electricity-to-sound-how-ultrasonic-generators-produce-high-frequency-vibrations","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/from-electricity-to-sound-how-ultrasonic-generators-produce-high-frequency-vibrations\/","title":{"rendered":"T\u1eeb \u0110i\u1ec7n N\u0103ng Th\u00e0nh \u00c2m Thanh: Kh\u00e1m Ph\u00e1 M\u00e1y Si\u00eau \u00c2m"},"content":{"rendered":"

\u0110i\u1ec7n n\u0103ng, ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng v\u00f4 h\u00ecnh nh\u01b0ng m\u1ea1nh m\u1ebd, c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i th\u00e0nh nhi\u1ec1u d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng kh\u00e1c, trong \u0111\u00f3 c\u00f3 \u00e2m thanh. Vi\u1ec7c bi\u1ebfn \u0111\u1ed5i n\u00e0y \u0111\u1eb7c bi\u1ec7t th\u00fa v\u1ecb \u1edf d\u1ea3i t\u1ea7n s\u1ed1 si\u00eau \u00e2m, v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ph\u00e1t si\u00eau \u00e2m, gi\u1ea3i th\u00edch c\u00e1ch ch\u00fang t\u1ea1o ra nh\u1eefng rung \u0111\u1ed9ng t\u1ea7n s\u1ed1 cao t\u1eeb ngu\u1ed3n \u0111i\u1ec7n.<\/p>\n

Nguy\u00ean l\u00fd \u00e1p \u0111i\u1ec7n<\/h3>\n

Nhi\u1ec1u m\u00e1y ph\u00e1t si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. Hi\u1ec7u \u1ee9ng n\u00e0y m\u00f4 t\u1ea3 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u, nh\u01b0 th\u1ea1ch anh ho\u1eb7c g\u1ed1m \u00e1p \u0111i\u1ec7n, t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n \u00e1p th\u00e0nh rung \u0111\u1ed9ng c\u01a1 h\u1ecdc. Khi \u00e1p d\u1ee5ng m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd gi\u00e3n n\u1edf v\u00e0 co l\u1ea1i theo t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p, t\u1ea1o ra s\u00f3ng \u00e2m.<\/p>\n

T\u1ea7n s\u1ed1 v\u00e0 c\u1ea5u t\u1ea1o c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i<\/h3>\n

T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p \u0111\u1eb7t v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n. \u0110\u1ec3 t\u1ea1o ra t\u1ea7n s\u1ed1 si\u00eau \u00e2m (th\u01b0\u1eddng tr\u00ean 20kHz), c\u1ea7n s\u1eed d\u1ee5ng m\u1ea1ch \u0111i\u1ec7n t\u1eed \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 t\u1ea1o ra \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u t\u1ea7n s\u1ed1 cao. B\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m, hay c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ea7u d\u00f2, l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a m\u00e1y ph\u00e1t si\u00eau \u00e2m, ch\u1ee9a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u1ed9ng h\u01b0\u1edfng \u1edf t\u1ea7n s\u1ed1 mong mu\u1ed1n, gi\u00fap t\u1ed1i \u0111a h\u00f3a bi\u00ean \u0111\u1ed9 rung v\u00e0 hi\u1ec7u su\u1ea5t chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

Khu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u<\/h3>\n

T\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p ban \u0111\u1ea7u th\u01b0\u1eddng c\u1ea7n \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9 \u0111\u1ee7 m\u1ea1nh k\u00edch th\u00edch v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n. M\u1ea1ch khu\u1ebfch \u0111\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho d\u1ea3i t\u1ea7n s\u1ed1 si\u00eau \u00e2m, \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng. Vi\u1ec7c ki\u1ec3m so\u00e1t bi\u00ean \u0111\u1ed9 t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o c\u0169ng cho ph\u00e9p \u0111i\u1ec1u ch\u1ec9nh c\u01b0\u1eddng \u0111\u1ed9 s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra.<\/p>\n

Ki\u1ec3m so\u00e1t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1<\/h3>\n

T\u1ea7n s\u1ed1 si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i t\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o. M\u1ed9t s\u1ed1 m\u00e1y ph\u00e1t si\u00eau \u00e2m cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1 trong m\u1ed9t kho\u1ea3ng nh\u1ea5t \u0111\u1ecbnh \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n

C\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a m\u00e1y ph\u00e1t si\u00eau \u00e2m<\/h3>\n\n\n\n\n\n\n\n\n\n
\u1ee8ng d\u1ee5ng<\/th>\nM\u00f4 t\u1ea3<\/th>\nT\u1ea7n s\u1ed1 \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n
V\u1ec7 sinh c\u00f4ng nghi\u1ec7p<\/td>\nLo\u1ea1i b\u1ecf b\u1ee5i b\u1ea9n, d\u1ea7u m\u1ee1 tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u<\/td>\n20-40 kHz<\/td>\n<\/tr>\n
H\u00e0n si\u00eau \u00e2m<\/td>\nN\u1ed1i c\u00e1c v\u1eadt li\u1ec7u nh\u1ef1a, kim lo\u1ea1i m\u1ecfng<\/td>\n20-40 kHz<\/td>\n<\/tr>\n
Ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y<\/td>\nPh\u00e1t hi\u1ec7n khuy\u1ebft t\u1eadt b\u00ean trong v\u1eadt li\u1ec7u<\/td>\n1-10 MHz<\/td>\n<\/tr>\n
Y t\u1ebf<\/td>\nCh\u1ee5p \u1ea3nh si\u00eau \u00e2m, \u0111i\u1ec1u tr\u1ecb ung th\u01b0<\/td>\n1-15 MHz<\/td>\n<\/tr>\n
X\u1eed l\u00fd n\u01b0\u1edbc<\/td>\nLo\u1ea1i b\u1ecf vi khu\u1ea9n, t\u1ea3o<\/td>\n20-100 kHz<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i t\u1eeb \u0111i\u1ec7n n\u0103ng sang s\u00f3ng si\u00eau \u00e2m l\u00e0 m\u1ed9t minh ch\u1ee9ng cho s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7. M\u00e1y ph\u00e1t si\u00eau \u00e2m, v\u1edbi kh\u1ea3 n\u0103ng t\u1ea1o ra rung \u0111\u1ed9ng t\u1ea7n s\u1ed1 cao, \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng g\u00f3p v\u00e0o nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb c\u00f4ng nghi\u1ec7p \u0111\u1ebfn y t\u1ebf, h\u1ee9a h\u1eb9n nhi\u1ec1u \u1ee9ng d\u1ee5ng ti\u1ec1m n\u0103ng trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u0110i\u1ec7n n\u0103ng, ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng v\u00f4 h\u00ecnh nh\u01b0ng m\u1ea1nh m\u1ebd, c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i th\u00e0nh nhi\u1ec1u d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng kh\u00e1c, trong \u0111\u00f3 c\u00f3 \u00e2m thanh. Vi\u1ec7c bi\u1ebfn \u0111\u1ed5i n\u00e0y \u0111\u1eb7c bi\u1ec7t th\u00fa v\u1ecb \u1edf d\u1ea3i t\u1ea7n s\u1ed1 si\u00eau \u00e2m, v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o nguy\u00ean l\u00fd<\/p>\n","protected":false},"author":1,"featured_media":24649,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-43621","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\/43621","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=43621"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/43621\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/24649"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=43621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=43621"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=43621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}