{"id":4684,"date":"2026-11-07T05:55:48","date_gmt":"2026-11-07T05:55:48","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=4684"},"modified":"2026-11-07T06:13:09","modified_gmt":"2026-11-07T06:13:09","slug":"what-is-dirty-electricity","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/what-is-dirty-electricity\/","title":{"rendered":"\u0110i\u1ec7n b\u1ea9n l\u00e0 g\u00ec?"},"content":{"rendered":"

\u0110i\u1ec7n b\u1ea9n \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 nhi\u1ec5u \u0111i\u1ec7n \u00e1p t\u1ea7n s\u1ed1 cao<\/strong> tr\u00ean m\u1ea1ng l\u01b0\u1edbi cung c\u1ea5p 50 ho\u1eb7c 60 Hz ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c t\u1ea1o ra th\u00f4ng qua ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n ch\u1ebf \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch c\u00f9ng v\u1edbi c\u00e1c t\u1ea3i kh\u00e1c t\u1ea1o ra c\u00e1c gi\u00e1n \u0111o\u1ea1n t\u1ea7n s\u1ed1 cao. T\u00ecnh hu\u1ed1ng n\u00e0y xoay quanh m\u1ed9t kh\u00eda c\u1ea1nh th\u01b0\u01a1ng m\u1ea1i \u0111\u00e1ng k\u1ec3 d\u1ef1a tr\u00ean vi\u1ec7c b\u00e1n thi\u1ebft b\u1ecb tuy\u00ean b\u1ed1 c\u00f3 t\u00ednh ch\u1ea5t tr\u1ecb li\u1ec7u, m\u1eb7c d\u00f9 kh\u00f4ng c\u00f3 b\u1eb1ng ch\u1ee9ng ch\u1eafc ch\u1eafn \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u00e1c tuy\u00ean b\u1ed1 n\u00e0y. Vi\u1ec7c x\u1eed l\u00fd hai v\u1ea5n \u0111\u1ec1 n\u00e0y m\u1ed9t c\u00e1ch ri\u00eang bi\u1ec7t l\u00e0 quan tr\u1ecdng \u0111\u1ec3 cung c\u1ea5p s\u1ef1 hi\u1ec3u bi\u1ebft \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 ch\u1ee7 \u0111\u1ec1 \u0111ang \u0111\u01b0\u1ee3c xem x\u00e9t.<\/p>\n

\u0110i\u1ec7n b\u1ea9n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch \u0111\u01a1n gi\u1ea3n nh\u1ea5t l\u00e0 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a nhi\u1ec5u \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n t\u1ea7n s\u1ed1 cao trong ph\u1ea1m vi kho\u1ea3ng 2 kHz \u0111\u1ebfn g\u1ea7n 150 kHz<\/strong> nhi\u1ec5u b\u0103ng r\u1ed9ng trong h\u1ec7 th\u1ed1ng l\u01b0\u1edbi ch\u00ednh ch\u1ee7 y\u1ebfu do ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n ch\u1ebf \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i, b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng t\u1ea7n s\u1ed1 cao, b\u1ed9 bi\u1ebfn t\u1ea7n n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m h\u1ed3 quang t\u1ea7n s\u1ed1 cao. \u0110i\u1ec7n b\u1ea9n \u0111\u01b0\u1ee3c \u0111\u1ecbnh l\u01b0\u1ee3ng b\u1eb1ng mili-volt c\u1ee7a th\u00e0nh ph\u1ea7n t\u1ea7n s\u1ed1 cao ho\u1eb7c \u0111\u00e1nh gi\u00e1 d\u01b0\u1edbi d\u1ea1ng ph\u00e1t x\u1ea1 d\u1eabn truy\u1ec1n thay v\u00ec m\u00e9o h\u00e0i. C\u00e1c t\u00e1c \u0111\u1ed9ng \u0111\u01b0\u1ee3c ghi nh\u1eadn c\u1ee7a \u0111i\u1ec7n b\u1ea9n s\u1ebd \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u1ea3nh h\u01b0\u1edfng c\u00f3 th\u1ec3 c\u00f3 \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u01b0 t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p ho\u1eb7c \u0111\u1ed9ng c\u01a1, ng\u1eaft nh\u1ea7m c\u1ee7a RCD, v\u00e0 g\u00e2y nhi\u1ec5u truy\u1ec1n t\u1ea3i \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n. S\u1ebd kh\u00f4ng c\u00f3 s\u1ef1 h\u1ed7 tr\u1ee3 c\u00e1c tuy\u00ean b\u1ed1 li\u00ean quan \u0111\u1ebfn t\u00e1c \u0111\u1ed9ng s\u1ee9c kh\u1ecfe b\u1edfi c\u00e1c c\u01a1 quan \u0111\u1ecba ph\u01b0\u01a1ng v\u1ec1 \u0111i\u1ec7n b\u1ea9n. Khuy\u1ebfn ngh\u1ecb ki\u1ec3m so\u00e1t \u0111i\u1ec7n b\u1ea9n t\u1ea1i ngu\u1ed3n b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng k\u1ef9 thu\u1eadt l\u1ecdc v\u00e0 n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch.<\/p><\/blockquote>\n

C\u00e1c chi ti\u1ebft d\u01b0\u1edbi \u0111\u00e2y nh\u1eb1m gi\u1ea3i th\u00edch \u00fd ngh\u0129a k\u1ef9 thu\u1eadt c\u1ee7a \u0111i\u1ec7n b\u1ea9n, c\u0169ng nh\u01b0 ngu\u1ed3n g\u1ed1c c\u1ee7a n\u00f3. N\u00f3 c\u0169ng c\u00f3 th\u1ec3 tr\u00ecnh b\u00e0y c\u00e1c t\u00e1c \u0111\u1ed9ng kh\u00e1c nhau c\u1ee7a \u0111i\u1ec7n b\u1ea9n l\u00ean c\u00e1c thi\u1ebft b\u1ecb v\u00e0 d\u1ee5ng c\u1ee5 kh\u00e1c nhau.<\/p>\n

T\u1eeb g\u00f3c nh\u00ecn c\u1ee7a k\u1ef9 s\u01b0 d\u1ecbch v\u1ee5 t\u00f2a nh\u00e0, c\u00f3 m\u1ed9t \u0111\u1ecbnh ngh\u0129a v\u1ec1 \u0111i\u1ec7n b\u1ea9n kh\u00f4ng bao g\u1ed3m ch\u1ee7 nh\u00e0 s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 c\u1eafm \u0111i\u1ec7n b\u1ea9n.<\/p>\n

\u0110\u1ecbnh ngh\u0129a v\u1ec1 \u0110i\u1ec7n B\u1ea9n trong Th\u1ef1c Ti\u1ec5n<\/h2>\n

Ba hi\u1ec7n t\u01b0\u1ee3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 \u0111i\u1ec7n b\u1ea9n c\u00f3 ngu\u1ed3n g\u1ed1c v\u00e0 gi\u1ea3i ph\u00e1p kh\u00e1c nhau.<\/p>\n

Tr\u00ec ho\u00e3n h\u00e0i<\/strong> li\u00ean quan \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh trong h\u00ecnh d\u1ea1ng s\u00f3ng \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n l\u1ec7ch kh\u1ecfi gi\u00e1 tr\u1ecb s\u00f3ng sin thu\u1ea7n t\u00fay (m\u1ed9t d\u1ea1ng s\u00f3ng \u0111i\u1ec7n ho\u00e0n to\u00e0n m\u01b0\u1ee3t m\u00e0) t\u1ea1i N l\u1ea7n t\u1ea7n s\u1ed1 cung c\u1ea5p v\u00e0o h\u1ec7 th\u1ed1ng. T\u1ea5t c\u1ea3 c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ph\u1ea3i tu\u00e2n th\u1ee7 gi\u1edbi h\u1ea1n m\u00e9o h\u00e0i l\u00e0 5% t\u1ea1i \u0111i\u1ec3m n\u1ed1i chung. C\u00e1c t\u1ea3i phi tuy\u1ebfn, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n t\u1ea7n s\u1ed1 bi\u1ebfn thi\u00ean, g\u00e2y ra s\u1ef1 ph\u00e1t sinh m\u00e9o h\u00e0i.<\/p>\n

Nhi\u1ec5u t\u1ea7n s\u1ed1 cao<\/strong> l\u00e0 nh\u1eefng g\u00ec ph\u1ea7n l\u1edbn m\u1ecdi ng\u01b0\u1eddi s\u1ebd coi l\u00e0 \u0111i\u1ec7n b\u1ea9n. Nhi\u1ec5u t\u1ea7n s\u1ed1 cao x\u1ea3y ra \u1edf c\u00e1c t\u1ea7n s\u1ed1 tr\u00ean m\u00e9o h\u00e0i, c\u1ee5 th\u1ec3 t\u1eeb 2 kilohertz (kHz) \u0111\u1ebfn 150 kHz, v\u00e0 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a c\u00e1c chu k\u1ef3 chuy\u1ec3n m\u1ea1ch trong ho\u1ea1t \u0111\u1ed9ng n\u1ed9i b\u1ed9 c\u1ee7a c\u00e1c m\u1ea1ch ngu\u1ed3n \u0111i\u1ec7n, ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 t\u1eeb h\u00e0ng ch\u1ee5c kHz \u0111\u1ebfn h\u00e0ng tr\u0103m kHz. B\u1ed9 ph\u00e2n t\u00edch h\u00e0i kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec5u t\u1ea7n s\u1ed1 cao, v\u00e0 b\u1ea5t k\u1ef3 ai t\u1ea1o b\u00e1o c\u00e1o ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng c\u0169ng s\u1ebd kh\u00f4ng c\u00f4ng b\u1ed1 th\u00f4ng tin v\u1ec1 hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, v\u00ec b\u1ed9 ph\u00e2n t\u00edch h\u00e0i ch\u1ec9 \u0111o \u0111\u01b0\u1ee3c \u0111\u1ebfn t\u1ea7n s\u1ed1 h\u00e0i th\u1ee9 50.<\/p>\n

C\u00e1c xung chuy\u1ec3n ti\u1ebfp<\/strong> l\u00e0 c\u00e1c \u0111\u1ec9nh \u0111i\u1ec7n \u00e1p gi\u00e1n \u0111o\u1ea1n c\u00f3 th\u1ec3 do vi\u1ec7c b\u1eadt\/t\u1eaft m\u1ea1ch ngu\u1ed3n ho\u1eb7c s\u00e9t \u0111\u00e1nh ho\u1eb7c h\u1ed3 quang trong m\u1ea1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n g\u00e2y ra. C\u00e1c xung \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t, m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng k\u1ef9 thu\u1eadt l\u1ecdc. N\u00ean hi\u1ec3u s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u1ea7u dao v\u00e0 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t<\/a> tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n b\u1ea5t k\u1ef3 mua s\u1eafm n\u00e0o cho \u0111i\u1ec1u ki\u1ec7n xung \u0111i\u1ec7n \u00e1p v\u00ec c\u00e1c thi\u1ebft b\u1ecb n\u00e0y ph\u1ee5c v\u1ee5 c\u00e1c ch\u1ee9c n\u0103ng kh\u00e1c nhau v\u00e0 kh\u00f4ng thi\u1ebft b\u1ecb n\u00e0o trong s\u1ed1 ch\u00fang l\u1ecdc nhi\u1ec5u t\u1ea7n s\u1ed1 cao qua h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh.<\/p>\n

M\u00f4 t\u1ea3 c\u1ee7a m\u1ed9t k\u1ef9 s\u01b0 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a r\u00f5 r\u00e0ng v\u00e0 li\u00ean quan \u0111\u1ebfn c\u00e1c k\u1ef9 s\u01b0 nh\u01b0 sau; t\u1ea5t c\u1ea3 c\u00e1c tr\u01b0\u1eddng h\u1ee3p nhi\u1ec5m b\u1ea9n ngu\u1ed3n v\u01b0\u1ee3t qu\u00e1 m\u1ee9c ti\u00eau chu\u1ea9n th\u00f4ng th\u01b0\u1eddng v\u00e0 c\u00e1c h\u00e0i b\u1ea9m sinh kh\u00f4ng th\u1ec3 x\u00e1c nh\u1eadn qua c\u00e1c ph\u00e9p \u0111o ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng b\u00ecnh th\u01b0\u1eddng. N\u00f3 \u0111\u01b0a ra m\u1ed9t ph\u00e2n lo\u1ea1i kh\u00e1ch quan nh\u01b0ng kh\u00f4ng n\u1ed5i ti\u1ebfng b\u1eb1ng \u0111\u1ecbnh ngh\u0129a tr\u01b0\u1edbc \u0111\u00f3 c\u1ee7a ch\u00fang t\u00f4i.<\/p>\n

\"Ngu\u1ed3n<\/p>\n

\u0110\u00e2y L\u00e0 Vai Tr\u00f2 C\u1ee7a N\u00f3<\/h2>\n

M\u1ed9t l\u00fd do \u0111\u1eb1ng sau vai tr\u00f2 c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch (SPS) trong c\u00e1c t\u00f2a nh\u00e0 ng\u00e0y nay ch\u1ee7 y\u1ebfu d\u1ef1a tr\u00ean th\u1ef1c t\u1ebf r\u1eb1ng ch\u00fang l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y nhi\u1ec5u \u0111i\u1ec7n t\u1eeb.<\/p>\n

M\u1ed9t SPS cung c\u1ea5p c\u1ea7u n\u1ed1i k\u1ebft n\u1ed1i ngu\u1ed3n AC th\u00f4ng qua ch\u1ee9c n\u0103ng chopper \u1edf t\u1ea7n s\u1ed1 cao v\u00e0 bi\u1ebfn \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n th\u00e0nh ngu\u1ed3n DC. Ch\u1ee9c n\u0103ng chopper t\u1ea1o ra c\u00e1c c\u1ea1nh \u0111i\u1ec7n \u00e1p s\u1eafc n\u00e9t t\u1ea1o ra c\u00e1c xung \u0111i\u1ec7n \u00e1p nh\u1ecf th\u00f4ng qua vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng b\u1eadt\/t\u1eaft trong ho\u1ea1t \u0111\u1ed9ng chopper. Trong khi m\u1ed9t b\u1ed9 ngu\u1ed3n laptop \u0111\u01a1n l\u1ebb kh\u00f4ng g\u00e2y nhi\u1ec5u theo b\u1ea5t k\u1ef3 c\u00e1ch n\u00e0o, th\u00ec khi b\u1ea1n k\u1ebft h\u1ee3p h\u00e0ng tr\u0103m b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED, b\u1ed9 ngu\u1ed3n laptop v\u00e0 b\u1ed9 s\u1ea1c pin, b\u1ed9 bi\u1ebfn t\u1ea7n t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i, v.v. tr\u00ean c\u00f9ng m\u1ed9t b\u1ea3ng \u0111i\u1ec7n, s\u1ebd x\u1ea3y ra m\u00e9o \u0111i\u1ec7n \u00e1p t\u1ea7n s\u1ed1 cao.<\/p>\n

Ballast \u0111i\u1ec7n t\u1eed, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c, b\u1ed9 bi\u1ebfn t\u1ea7n t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i, ngu\u1ed3n \u0111i\u1ec7n li\u00ean t\u1ee5c v\u00e0 b\u1ed9 bi\u1ebfn t\u1ea7n n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi l\u00e0 n\u0103m ngu\u1ed3n c\u01a1 b\u1ea3n g\u00e2y ra nhi\u1ec5u \u0111i\u1ec7n t\u1eeb trong m\u1ecdi h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. Ngo\u00e0i ra, c\u00e1c k\u1ebft n\u1ed1i h\u1ed3 quang c\u0169ng c\u00f3 th\u1ec3 t\u1ea1o ra nhi\u1ec5u \u0111i\u1ec7n t\u1eeb, do \u0111\u00f3 l\u00e0 m\u1ed9t m\u1ed1i quan t\u00e2m nghi\u00eam tr\u1ecdng li\u00ean quan \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng.<\/p>\n

Thi\u1ebft k\u1ebf d\u00e2y ch\u00ednh x\u00e1c quan tr\u1ecdng kh\u00f4ng k\u00e9m trong vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u1ec5u so v\u1edbi ngu\u1ed3n \u0111i\u1ec7n th\u00edch h\u1ee3p. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng chi\u1ec1u d\u00e0i d\u00e2y \u0111\u00f4i k\u00e9o d\u00e0i, c\u00f3 c\u00e1c k\u1ebft n\u1ed1i trung t\u00ednh chung, thi\u1ebfu n\u1ed1i \u0111\u1ea5t v\u00e0 th\u1eadm ch\u00ed truy\u1ec1n t\u00edn hi\u1ec7u b\u1eb1ng c\u00e1ch g\u1eedi tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ea3i.<\/p>\n

B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft c\u00e1c ngu\u1ed3n v\u1ea5n \u0111\u1ec1, t\u00e1c \u0111\u1ed9ng v\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u1ec3 \u0111\u1ed1i ph\u00f3.<\/p>\n\n\n\n\n\n\n\n\n\n
Ngu\u1ed3n V\u1ea5n \u0110\u1ec1<\/th>\nT\u1ea7n S\u1ed1 B\u1eaft \u0110\u1ea7u \u2013 T\u1ea7n S\u1ed1 K\u1ebft Th\u00fac<\/th>\nT\u00e1c \u0110\u1ed9ng<\/th>\nC\u00e1c h\u00e0nh \u0111\u1ed9ng ti\u00eau chu\u1ea9n<\/th>\n<\/tr>\n<\/thead>\n
B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/td>\n20 kHz \u2013 1 MHz<\/td>\nM\u1ee9c ti\u1ebfng \u1ed3n th\u1ea5p li\u00ean t\u1ee5c, c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 c\u1ed1 v\u1edbi truy\u1ec1n th\u00f4ng<\/td>\nL\u1ecdc t\u1ea1i ngu\u1ed3n, ph\u00e2n t\u00e1ch b\u1ea3ng m\u1ea1ch.<\/td>\n<\/tr>\n
B\u1ed9 \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i<\/td>\n2 kHz \u2013 150 kHz<\/td>\nL\u00e0m n\u00f3ng \u0111\u1ed9ng c\u01a1 v\u00e0 ng\u1eaft m\u1ea1ch RCD kh\u00f4ng mong mu\u1ed1n<\/td>\nS\u1eed d\u1ee5ng \u0111i\u1ec7n kh\u00e1ng n\u1ed1i ti\u1ebfp ho\u1eb7c c\u00e1p \u0111\u1ed9ng c\u01a1 c\u00f3 l\u1edbp ch\u1eafn<\/td>\n<\/tr>\n
Ph\u00f3ng \u0111i\u1ec7n h\u1ed3 quang \u0111i\u1ec7n t\u1ea1i m\u1ed9t k\u1ebft n\u1ed1i<\/td>\nTi\u1ebfng \u1ed3n xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c \u0111\u1ec9nh nh\u1ecdn<\/td>\nCh\u00e1y, nguy c\u01a1 h\u1ecfa ho\u1ea1n v\u00e0 ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/td>\nK\u1ebft n\u1ed1i l\u1ea1i, \u0111\u1ea3m b\u1ea3o m\u00f4-men xo\u1eafn ch\u00ednh x\u00e1c v\u00e0 AFDD<\/td>\n<\/tr>\n
Xung \u0111i\u1ec7n g\u00e2y ra b\u1edfi s\u00e9t v\u00e0 c\u00e1c ho\u1ea1t \u0111\u1ed9ng chuy\u1ec3n m\u1ea1ch<\/td>\nXung \u0111i\u1ec7n k\u00e9o d\u00e0i d\u01b0\u1edbi 1 ms<\/td>\nH\u01b0 h\u1ecfng thi\u1ebft b\u1ecb, c\u0103ng th\u1eb3ng qu\u00e1 m\u1ee9c l\u00ean l\u1edbp c\u00e1ch \u0111i\u1ec7n<\/td>\nS\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 ch\u1ed1ng xung, kh\u00f4ng l\u1ecdc \u1edf t\u1ea7n s\u1ed1 n\u00e0y.<\/td>\n<\/tr>\n
Bi\u1ebfn d\u1ea1ng h\u00e0i h\u00f2a<\/td>\n100 Hz \u0111\u1ebfn 2,5 kHz<\/td>\nQu\u00e1 nhi\u1ec7t trung t\u00ednh v\u00e0 bi\u1ebfn \u00e1p<\/td>\nS\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p c\u00e2n b\u1eb1ng t\u1ea3i v\u00e0 b\u1ed9 l\u1ecdc h\u00e0i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a d\u1ea3i t\u1ea7n 2 kHz \u0111\u1ebfn 150 kHz<\/h2>\n

C\u00f3 c\u00e1c ti\u00eau chu\u1ea9n v\u1ec1 ph\u00e1t x\u1ea1 n\u0103ng l\u01b0\u1ee3ng \u1edf c\u00e1c t\u1ea7n s\u1ed1 kh\u00e1c nhau cho c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb trong hai d\u1ea3i t\u1ea7n. Ph\u1ea7n l\u1edbn ph\u00e1t x\u1ea1 n\u0103ng l\u01b0\u1ee3ng trong d\u1ea3i t\u1ea7n t\u1eeb 2 \u0111\u1ebfn 150 kHz th\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 ph\u00e1t x\u1ea1 b\u1ea9n.<\/p>\n

\u0110\u1ea7u ti\u00ean, ph\u00e1t x\u1ea1 \u1edf c\u00e1c t\u1ea7n s\u1ed1 th\u1ea5p h\u01a1n 2 kHz \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh b\u1edfi gi\u1edbi h\u1ea1n m\u00e9o h\u00e0i theo ti\u00eau chu\u1ea9n IEEE 519 \u1edf B\u1eafc M\u1ef9. Ph\u00e1t x\u1ea1 \u1edf c\u00e1c t\u1ea7n s\u1ed1 cao h\u01a1n 150 kHz \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1edfi c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf CISPR 11 v\u00e0 CISPR 32. Cho \u0111\u1ebfn g\u1ea7n \u0111\u00e2y, ch\u01b0a c\u00f3 quy \u0111\u1ecbnh cho d\u1ea3i t\u1ea7n t\u1eeb 2 \u0111\u1ebfn 150 kHz, bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch v\u00e0 c\u00e1c d\u1ea3i t\u1ea7n g\u00e2y t\u00edch t\u1ee5 ti\u1ebfng \u1ed3n.<\/p>\n

Kho\u1ea3ng tr\u1ed1ng trong quy \u0111\u1ecbnh n\u00e0y l\u00e0 nguy\u00ean nh\u00e2n d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3. N\u1ebfu m\u1ed9t s\u1ea3n ph\u1ea9m tu\u00e2n th\u1ee7 t\u1ea5t c\u1ea3 c\u00e1c quy t\u1eafc v\u1ec1 t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC), v\u1eabn c\u00f3 kh\u1ea3 n\u0103ng n\u00f3 g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng trong d\u1ea3i t\u1ea7n t\u1eeb 2 \u0111\u1ebfn 150 kHz. CISPR 16-1-2 cung c\u1ea5p ph\u01b0\u01a1ng ph\u00e1p \u0111o ph\u00e1t x\u1ea1 trong d\u1ea3i n\u00e0y, nh\u01b0ng vi\u1ec7c th\u1ef1c thi c\u00e1c ti\u00eau chu\u1ea9n s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1ea1i nhi\u1ec1u s\u1ea3n ph\u1ea9m ph\u00e1t ra ti\u1ebfng \u1ed3n trong d\u1ea3i t\u1ea7n n\u00e0y.<\/p>\n

Do \u0111\u00f3, \u0111i\u1ec1u n\u00e0y s\u1ebd \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn c\u00e1c k\u1ef9 s\u01b0 n\u0103ng l\u01b0\u1ee3ng t\u00f2a nh\u00e0 v\u00ec thi\u1ebft b\u1ecb \u0111o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ed9 ph\u00e2n t\u00edch ch\u1ea5t l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n theo IEC 61000-4-30, c\u00f3 kh\u1ea3 n\u0103ng \u0111o h\u00e0i b\u1eadc 50 ho\u1eb7c 63 (2,5 kHz \u0111\u1ebfn 3,15 kHz \u1edf 50 Hz) thay v\u00ec y\u00eau c\u1ea7u s\u1eed d\u1ee5ng \u0111\u1ea7u d\u00f2 d\u00f2ng \u0111i\u1ec7n t\u1ea7n s\u1ed1 cao v\u00e0 b\u1ed9 ph\u00e2n t\u00edch ph\u1ed5 \u0111\u1ec3 b\u00e1o c\u00e1o \u1edf t\u1ea7n s\u1ed1 cao h\u01a1n.<\/p>\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a ti\u1ebfng \u1ed3n \u0111i\u1ec7n l\u00ean thi\u1ebft b\u1ecb<\/h2>\n

C\u00f3 ba lo\u1ea1i \u1ea3nh h\u01b0\u1edfng g\u1ed3m \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t, \u1ea3nh h\u01b0\u1edfng ch\u1ee9c n\u0103ng v\u00e0 \u1ea3nh h\u01b0\u1edfng truy\u1ec1n th\u00f4ng s\u1ebd \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch th\u00eam \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn hai lo\u1ea1i sau v\u1edbi \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t v\u1ec1 chi ph\u00ed th\u1ef1c t\u1ebf \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng.<\/p>\n

\u1ea2nh h\u01b0\u1edfng nhi\u1ec7t.<\/span> Hi\u1ec7u \u1ee9ng da v\u1ed1n c\u00f3 trong truy\u1ec1n t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 cao g\u00e2y ra d\u00f2ng \u0111i\u1ec7n ch\u1ea3y kh\u00f4ng \u0111\u1ec1u qua m\u1ed9t d\u00e2y d\u1eabn, v\u00ec d\u00f2ng \u0111i\u1ec7n x\u1ea3 m\u1ea1nh h\u01a1n tr\u00ean b\u1ec1 m\u1eb7t, v\u00e0 do n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t sinh ra trong qu\u00e1 tr\u00ecnh d\u1eabn \u0111i\u1ec7n, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn qu\u00e1 nhi\u1ec7t qu\u00e1 m\u1ee9c trong c\u00e1c d\u00e2y d\u1eabn li\u00ean t\u1ee5c truy\u1ec1n t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 cao. \u1ea2nh h\u01b0\u1edfng c\u1ee7a d\u00f2ng \u0111i\u1ec7n t\u1ea7n s\u1ed1 cao l\u00ean c\u00e1c thi\u1ebft b\u1ecb t\u1ee5 \u0111i\u1ec7n c\u0169ng c\u1ea7n \u0111\u01b0\u1ee3c hi\u1ec3u v\u00ec \u0111\u00e2y l\u00e0 nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y h\u1ecfng h\u00f3c do m\u1ee9c c\u00f4ng su\u1ea5t qu\u00e1 cao.<\/p>\n

Khi th\u1ef1c hi\u1ec7n c\u00e1c thi\u1ebft k\u1ebf \u0111i\u1ec7n, c\u00e1c k\u1ef9 s\u01b0 c\u1ea7n xem x\u00e9t \u1ea3nh h\u01b0\u1edfng c\u1ee7a d\u00f2ng \u0111i\u1ec7n t\u1ea7n s\u1ed1 cao l\u00ean c\u00e1c thi\u1ebft b\u1ecb t\u1ee5 \u0111i\u1ec7n v\u00ec qu\u00e1 nhi\u1ec7t s\u1ebd x\u1ea3y ra v\u00e0 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c s\u1edbm.<\/p>\n

Trong h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n, d\u00f9 l\u00e0 l\u01b0\u1edbi \u0111i\u1ec7n th\u00f4ng minh hay h\u1ec7 th\u1ed1ng truy\u1ec1n t\u1ea3i \u0111i\u1ec7n, t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1eef nguy\u00ean. S\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a nhi\u1ec5u t\u1ea7n s\u1ed1 cao s\u1ebd g\u00e2y nhi\u1ec5u hi\u1ec7u su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng v\u00ec n\u00f3 b\u1ecb l\u00e0m h\u1ecfng b\u1edfi nhi\u1ec5u, \u0111\u00e2y ho\u00e0n to\u00e0n l\u00e0 v\u1ea5n \u0111\u1ec1 truy\u1ec1n th\u00f4ng.<\/p>\n

S\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a nhi\u1ec5u c\u0169ng kh\u00e1 ph\u1ed5 bi\u1ebfn trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00e1c theo c\u00e1ch ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra qua nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c kh\u00e1c nhau. Trong tr\u01b0\u1eddng h\u1ee3p nhi\u1ec5u n\u00e0y \u0111\u01b0\u1ee3c t\u1ea1o ra, kh\u00f4ng th\u1ec3 quy k\u1ebft l\u1ea1i m\u1ed9t v\u1ecb tr\u00ed v\u1eadt l\u00fd duy nh\u1ea5t v\u00ec n\u00f3 lu\u00f4n l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ng\u1eabu nhi\u00ean.<\/p>\n

C\u00f3 th\u1ec3 nghi\u00ean c\u1ee9u v\u00e0 ph\u00e2n t\u00edch c\u00e1c h\u1ed3 quang \u0111i\u1ec7n hi\u1ec7n di\u1ec7n trong h\u1ec7 th\u1ed1ng v\u00ec n\u00f3 s\u1ebd x\u00e1c \u0111\u1ecbnh c\u1ea3 nguy\u00ean nh\u00e2n v\u00e0 m\u1ed9t<\/p>\n

Trong tr\u01b0\u1eddng h\u1ee3p m\u00e1y ph\u00e2n t\u00edch tr\u1edf kh\u00e1ng ph\u00e1t hi\u1ec7n c\u00e1c s\u1ef1 ki\u1ec7n gi\u00e1n \u0111o\u1ea1n m\u00e0 kh\u00f4ng ph\u00e1t ra \u00e2m thanh, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 ch\u1eb7t c\u1ee7a k\u1ebft n\u1ed1i \u0111i\u1ec7n h\u01a1n l\u00e0 v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn x\u1eed l\u00fd t\u1ea3i. thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n l\u1ed7i h\u1ed3 quang<\/a> x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c tr\u01b0ng c\u1ee7a h\u1ed3 quang n\u1ed1i ti\u1ebfp v\u00e0 ng\u1eaft tr\u01b0\u1edbc khi x\u1ea3y ra ch\u00e1y, do \u0111\u00f3 l\u00e0 ch\u1ee9c n\u0103ng kh\u00e1c v\u1edbi l\u1ecdc.<\/p>\n

\"t\u00e1c<\/p>\n

B\u1eb1ng ch\u1ee9ng li\u00ean quan \u0111\u1ebfn c\u00e1c tuy\u00ean b\u1ed1 v\u1ec1 s\u1ee9c kh\u1ecfe<\/h2>\n

\u0110\u00e2y l\u00e0 n\u01a1i ch\u1ee7 \u0111\u1ec1 v\u01b0\u1ee3t ra ngo\u00e0i l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt \u0111i\u1ec7n sang m\u1ed9t \u0111i\u1ec1u g\u00ec \u0111\u00f3 d\u1ec5 gi\u1ea3i th\u00edch h\u01a1n cho ng\u01b0\u1eddi kh\u00f4ng chuy\u00ean.<\/p>\n

C\u00f3 r\u1ea5t nhi\u1ec1u th\u00f4ng tin li\u00ean quan \u0111\u1ebfn tuy\u00ean b\u1ed1 r\u1eb1ng \u0111i\u1ec7n b\u1ea9n g\u00e2y m\u1ec7t m\u1ecfi, \u0111au \u0111\u1ea7u v\u00e0 r\u1ed1i lo\u1ea1n gi\u1ea5c ng\u1ee7 \u1edf ng\u01b0\u1eddi. T\u1ed5 ch\u1ee9c Y t\u1ebf Th\u1ebf gi\u1edbi th\u00f4ng qua c\u00e1c b\u00e1o c\u00e1o v\u00e0 c\u00e1c c\u01a1 quan b\u1ea3o v\u1ec7 b\u1ee9c x\u1ea1 qu\u1ed1c gia kh\u00e1c \u0111\u00e3 x\u00e1c nh\u1eadn r\u1eb1ng kh\u00f4ng c\u00f3 b\u1eb1ng ch\u1ee9ng th\u1ef1c nghi\u1ec7m n\u00e0o li\u00ean k\u1ebft m\u1ee9c \u0111i\u1ec7n b\u1ea9n trong c\u00e1c t\u00f2a nh\u00e0 v\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 s\u1ee9c kh\u1ecfe.<\/p>\n

M\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng th\u00fa v\u1ecb trong l\u0129nh v\u1ef1c n\u00e0y \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 hi\u1ec7u \u1ee9ng nocebo<\/strong>: b\u1ec7nh nh\u00e2n b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi t\u00ecnh tr\u1ea1ng n\u00e0y bi\u1ec3u hi\u1ec7n c\u00e1c tri\u1ec7u ch\u1ee9ng c\u1ee7a h\u1ecd b\u1ea5t k\u1ec3 lo\u1ea1i ph\u01a1i nhi\u1ec5m n\u00e0o li\u00ean quan. Ki\u1ebfn th\u1ee9c n\u00e0y kh\u00f4ng ng\u1ee5 \u00fd r\u1eb1ng h\u1ecd kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 b\u1ec7nh l\u00fd n\u00e0o m\u00e0 thay v\u00e0o \u0111\u00f3 l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o x\u1eed l\u00fd ph\u00f9 h\u1ee3p c\u00e1c khi\u1ebfu n\u1ea1i c\u1ee7a h\u1ecd v\u00ec kh\u00f4ng ph\u1ea3i m\u1ecdi ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tr\u1ecb \u0111\u1ec1u hi\u1ec7u qu\u1ea3.<\/p>\n

M\u1ed9t kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt l\u00e0m ph\u1ee9c t\u1ea1p v\u1ea5n \u0111\u1ec1 s\u1ee9c kh\u1ecfe l\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n t\u1eeb \u1edf t\u1ea7n s\u1ed1 cao th\u1ef1c s\u1ef1 g\u00e2y n\u00f3ng c\u00e1c thi\u1ebft b\u1ecb l\u1eafp \u0111\u1eb7t v\u00e0 g\u00e2y ng\u1eaft m\u1ea1ch phi\u1ec1n to\u00e1i c\u0169ng nh\u01b0 nhi\u1ec5u truy\u1ec1n th\u00f4ng. L\u00fd do \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 nhi\u1ec5u n\u00e0y l\u00e0 h\u1ee3p l\u00fd ch\u1ec9 d\u1ef1a tr\u00ean \u0111i\u1ec1u \u0111\u00f3.<\/p>\n

H\u01b0\u1edbng d\u1eabn \u0111o l\u01b0\u1eddng \u0111\u00fang<\/h2>\n

N\u1ebfu c\u00f3 m\u1ea5t m\u00e1t ti\u1ec1n b\u1ea1c qua \u0111o l\u01b0\u1eddng, ch\u1ee7 y\u1ebfu l\u00e0 v\u00ec c\u00e1c thi\u1ebft b\u1ecb \u0111o tin c\u1eady nh\u1ea5t \u0111\u01b0a ra k\u1ebft qu\u1ea3 theo \u0111\u01a1n v\u1ecb t\u00f9y \u00fd, kh\u00f4ng th\u1ec3 so s\u00e1nh t\u1ea1i c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau ho\u1eb7c tr\u01b0\u1edbc v\u00e0 sau khi c\u00f3 b\u1ea5t k\u1ef3 s\u1eeda \u0111\u1ed5i n\u00e0o.<\/p>\n

B\u01b0\u1edbc \u0111o \u0111\u1ea7u ti\u00ean li\u00ean quan \u0111\u1ebfn kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n \u0111\u00fang c\u00e1ch c\u1ee7a ti\u1ec7n \u00edch. Ti\u1ec7n \u00edch s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb lo\u1ea1i A \u0111\u1ec3 thu th\u1eadp th\u00f4ng tin \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n, h\u00e0i h\u00f2a (l\u00ean \u0111\u1ebfn h\u00e0i h\u00f2a b\u1eadc 50), nh\u1ea5p nh\u00e1y v\u00e0 xung trong \u00edt nh\u1ea5t m\u1ed9t tu\u1ea7n. \u0110i\u1ec1u n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 l\u00e0 t\u1ea1m th\u1eddi, h\u00e0i h\u00f2a hay t\u1ea7n s\u1ed1 cao v\u00e0 l\u00e0m c\u01a1 s\u1edf so s\u00e1nh cho c\u1ea3 ti\u1ec7n \u00edch v\u00e0 t\u01b0 v\u1ea5n v\u00ec d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 h\u1ee3p l\u1ec7.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111o th\u1ee9 hai li\u00ean quan \u0111\u1ebfn \u0111o t\u1ea7n s\u1ed1 cao. N\u1ebfu kh\u1ea3o s\u00e1t ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n \u0111\u00e3 ti\u1ebft l\u1ed9 v\u1ea5n \u0111\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng, th\u00ec ngu\u1ed3n s\u1ebd \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n ph\u1ed5 kHz b\u1eb1ng m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 v\u00e0 \u0111\u1ea7u d\u00f2 d\u00f2ng c\u0169ng l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u trong kho\u1ea3ng 2-150kHz.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111o th\u1ee9 ba li\u00ean quan \u0111\u1ebfn s\u1ef1 t\u01b0\u01a1ng quan v\u1edbi t\u1ea3i. V\u00ec c\u00e1c ph\u00e9p \u0111o s\u1ebd di\u1ec5n ra khi ch\u00fang ta b\u1eadt v\u00e0 t\u1eaft c\u00e1c b\u1ea3ng m\u1ea1ch l\u1ea7n l\u01b0\u1ee3t, s\u1ebd d\u1ec5 d\u00e0ng x\u00e1c \u0111\u1ecbnh c\u00e1c ph\u1ee9c t\u1ea1p trong v\u00f2ng m\u1ed9t gi\u1edd.<\/p>\n

Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ed3ng h\u1ed3 \u0111o cho k\u1ebft qu\u1ea3 theo \u0111\u01a1n v\u1ecb h\u01b0 c\u1ea5u kh\u00f4ng gi\u00fap \u00edch g\u00ec v\u00ec ch\u00fang m\u00f4 t\u1ea3 c\u1ea3 d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng theo gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i m\u00e0 theo d\u1eef li\u1ec7u h\u01b0 c\u1ea5u.<\/p>\n

Gi\u1ea3i ph\u00e1p: Ki\u1ec3m so\u00e1t ngu\u1ed3n, L\u1ecdc v\u00e0 \u0110\u1ea5t h\u00f3a<\/h2>\n

C\u1ea7n nh\u1ea5n m\u1ea1nh vi\u1ec7c s\u1eafp x\u1ebfp k\u1ebft lu\u1eadn. Ti\u1ebfng \u1ed3n \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1ecdc kh\u00f4ng th\u1ec3 d\u1eebng l\u1ea1i khi ti\u1ebfng \u1ed3n \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb ngu\u1ed3n d\u1eabn \u0111\u1ebfn chi ph\u00ed li\u00ean t\u1ee5c.<\/p>\n

Ki\u1ec3m so\u00e1t ngu\u1ed3n.<\/span> S\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n ph\u00e1t th\u1ea3i th\u1ea5p \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh v\u00e0 s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh trong d\u1ea3i t\u1ea7n s\u1ed1 do nh\u00e0 s\u1ea3n xu\u1ea5t quy \u0111\u1ecbnh t\u1eeb 2 kHz \u0111\u1ebfn 150 kHz. Ngo\u00e0i ra, tr\u00e1nh t\u00edch t\u1ee5 nhi\u1ec1u thi\u1ebft b\u1ecb gi\u00e1 r\u1ebb tr\u00ean c\u00f9ng m\u1ed9t b\u1ea3ng chung. N\u1ebfu b\u1ea1n l\u00e0 ch\u1ee7 s\u1edf h\u1eefu c\u1ee7a c\u00e1c t\u00f2a nh\u00e0 m\u1edbi, th\u00ec \u0111\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 hi\u1ec7n t\u1ea1i b\u1ea1n ch\u01b0a ph\u1ea3i ch\u1ecbu chi ph\u00ed n\u00e0o li\u00ean quan \u0111\u1ebfn \u0111i\u1ec1u n\u00e0y.<\/p>\n

Ph\u00e2n t\u00e1ch m\u1ea1ch.<\/span> \u0110\u1ea3m b\u1ea3o c\u00e1c nh\u00f3m m\u1ea1ch t\u1ea3i n\u1eb7ng kh\u00f4ng tr\u1ed9n l\u1eabn v\u1edbi c\u00e1c nh\u00f3m m\u1ea1ch nh\u1ea1y c\u1ea3m, bao g\u1ed3m c\u1ea3 m\u1ea1ch ILS. Gi\u1eef c\u00e1p v\u00e0 ngu\u1ed3n \u0111i\u1ec7n t\u00e1ch bi\u1ec7t, giao nhau \u00edt nh\u1ea5t 90 \u0111\u1ed9, tr\u00e1nh ch\u1ea1y c\u00e1p song song d\u00e0i c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t. H\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb trong m\u00f4i tr\u01b0\u1eddng t\u00f2a nh\u00e0 th\u01b0\u01a1ng m\u1ea1i \u0111\u1ec1u \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft d\u1ec5 d\u00e0ng ch\u1ec9 b\u1eb1ng c\u00e1ch ph\u00e2n t\u00e1ch m\u1ea1ch.<\/p>\n

L\u1ecdc cu\u1ed1i c\u00f9ng.<\/span> L\u1ecdc \u0111i\u1ec7n dung tr\u01b0\u1edbc t\u1ea3i \u0111\u1ec3 gi\u1ea3m thi\u1ec3u EMI lan truy\u1ec1n \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c tr\u00ean c\u00f9ng b\u1ea3ng m\u1ea1ch tr\u01b0\u1edbc khi \u0111\u1ebfn thi\u1ebft b\u1ecb ILS c\u1ee7a b\u1ea1n, nh\u01b0ng b\u1ed9 l\u1ecdc ph\u1ea3i \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u t\u1ed5n hao ch\u00e8n \u2013 c\u00f3 th\u1ec3 kh\u00f4ng c\u00f3 \u0111i\u1ec3m suy gi\u1ea3m c\u1ee5 th\u1ec3 tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u n\u1ebfu b\u1ea1n kh\u00f4ng c\u00f3 \u0111i\u1ec3m ch\u1ec9 \u0111\u1ecbnh c\u1ee5 th\u1ec3.<\/p>\n

C\u00e1ch ly.<\/span> T\u1eeb quan \u0111i\u1ec3m t\u0103ng kh\u1ea3 n\u0103ng l\u1ecdc th\u00e0nh c\u00f4ng EMI kh\u00f4ng mong mu\u1ed1n t\u1eeb thi\u1ebft b\u1ecb ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0\/ho\u1eb7c ph\u00f2ng thu \u00e2m, bi\u1ebfn \u00e1p c\u00e1ch ly c\u00f3 l\u1edbp ch\u1eafn \u0111i\u1ec7n t\u0129nh l\u00e0 m\u1ed9t \u00fd t\u01b0\u1edfng t\u1ed1t \u0111\u1ec3 xem x\u00e9t khi l\u00e0m vi\u1ec7c v\u1edbi thi\u1ebft b\u1ecb \u0111i\u1ec7n nh\u1ea1y c\u1ea3m.<\/p>\n

Lo\u1ea1i thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 n\u00ean \u0111\u01b0\u1ee3c ch\u1ecdn cho b\u1ea3ng ph\u00e2n ph\u1ed1i<\/a> l\u00e0 quan tr\u1ecdng, v\u00ec n\u00f3 c\u00f3 th\u1ec3 gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng kh\u1ea3 n\u0103ng mi\u1ec5n nhi\u1ec5m t\u1ea7n s\u1ed1 cao s\u1ebd kh\u00f4ng g\u00f3p ph\u1ea7n g\u00e2y ng\u1eaft m\u1ea1ch phi\u1ec1n to\u00e1i trong v\u1ea5n \u0111\u1ec1 nhi\u1ec5u hi\u1ec7n c\u00f3.<\/p>\n

\"\"<\/p>\n

C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh cho th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt trong thi\u1ebft k\u1ebf c\u01a1 s\u1edf m\u1edbi<\/h2>\n

Trong b\u1ea5t k\u1ef3 t\u00f2a nh\u00e0 n\u00e0o c\u00f3 y\u00eau c\u1ea7u t\u1ea3i \u0111i\u1ec7n t\u1eed l\u1edbn, c\u00f3 n\u0103m th\u00e0nh ph\u1ea7n c\u1ea7n thi\u1ebft n\u00ean \u0111\u01b0\u1ee3c bao g\u1ed3m trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111i\u1ec7n c\u1ee7a b\u1ea1n, t\u1ea5t c\u1ea3 \u0111\u1ec1u c\u00f3 chi ph\u00ed th\u1ea5p h\u01a1n trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf so v\u1edbi giai \u0111o\u1ea1n tu\u00e2n th\u1ee7.<\/p>\n

Thi\u1ebft l\u1eadp gi\u1edbi h\u1ea1n bi\u1ebfn d\u1ea1ng h\u00e0i (\u0111i\u1ec3m n\u1ed1i chung) s\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n (th\u01b0\u1eddng l\u00e0 IEEE 519 ho\u1eb7c t\u01b0\u01a1ng t\u1ef1), y\u00eau c\u1ea7u t\u01b0 v\u1ea5n ch\u1ee9ng minh tu\u00e2n th\u1ee7 b\u1eb1ng c\u00e1c ph\u00e9p \u0111o, kh\u00f4ng ph\u1ea3i t\u00ednh to\u00e1n.<\/p>\n

S\u1eed d\u1ee5ng b\u1ea3ng ri\u00eang cho t\u1ea3i phi tuy\u1ebfn, nh\u01b0 l\u1eafp \u0111\u1eb7t bi\u1ebfn t\u1ea7n, thi\u1ebft b\u1ecb ngh\u1ecbch l\u01b0u v\u00e0 \u0111\u00e8n LED l\u1edbn, s\u1ebd gi\u1ea3m t\u00e1c \u0111\u1ed9ng c\u1ee7a ho\u1ea1t \u0111\u1ed9ng ch\u00fang l\u00ean t\u1ea3i thi\u1ebft b\u1ecb \u0111o v\u00e0 b\u1ea3ng IT, n\u00ean \u0111\u01b0\u1ee3c t\u00e1ch bi\u1ec7t v\u1edbi nhau.<\/p>\n

K\u00edch th\u01b0\u1edbc d\u00e2y d\u1eabn trung t\u00ednh n\u00ean xem x\u00e9t c\u1ea3 d\u00f2ng h\u00e0i v\u00ec s\u1ef1 \u0111\u00f3ng g\u00f3p c\u1ee7a h\u00e0i ba l\u00e0m tri\u1ec7t ti\u00eau \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u00f3 l\u00ean d\u00f2ng trung t\u00ednh. Do \u0111\u00f3, c\u01a1 s\u1edf cho d\u00e2y d\u1eabn trung t\u00ednh s\u1ebd \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi k\u00edch th\u01b0\u1edbc d\u00f2ng c\u01a1 b\u1ea3n v\u00e0 n\u00ean xem x\u00e9t \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t c\u1ee7a t\u1ea3i \u0111\u1eb7t l\u00ean c\u01a1 s\u1edf.<\/p>\n

Cung c\u1ea5p b\u1eb1ng ch\u1ee9ng ki\u1ec3m tra n\u1ed1i \u0111\u1ea5t v\u00e0 li\u00ean k\u1ebft, nh\u01b0 k\u1ebft qu\u1ea3 tr\u1edf kh\u00e1ng v\u00f2ng v\u00e0 ki\u1ec3m tra li\u00ean k\u1ebft, n\u00ean \u0111\u01b0\u1ee3c cung c\u1ea5p trong giai \u0111o\u1ea1n chuy\u1ec3n ti\u1ebfp.<\/p>\n

K\u1ebft qu\u1ea3 c\u1ee7a c\u00e1c th\u1eed nghi\u1ec7m v\u1eadn h\u00e0nh trong d\u1ea3i t\u1ea7n s\u1ed1 t\u1eeb 2-150 kHz n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ti\u00eau chu\u1ea9n cho c\u00e1c d\u1ef1 \u00e1n hi\u1ec7n t\u1ea1i.<\/p>\n

Cu\u1ed1i c\u00f9ng, c\u00f3 c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 v\u00e0 ph\u00e2n ph\u1ed1i<\/a> t\u1ed3n t\u1ea1i trong c\u00e1c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111\u00f3 m\u00e0 tr\u00ean \u0111\u00f3 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00ean b\u1eaft \u0111\u1ea7u v\u00e0 c\u00e1c ph\u00e9p \u0111o n\u00ean \u0111\u01b0\u1ee3c d\u1ef1a tr\u00ean.<\/p>\n

V\u1ecb Tr\u00ed c\u1ee7a HUYU<\/h2>\n

Ch\u00fang t\u00f4i s\u1ea3n xu\u1ea5t c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch, thi\u1ebft b\u1ecb d\u00f2ng r\u00f2, v\u00e0 thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n l\u1ed7i h\u1ed3 quang c\u00f9ng c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n li\u00ean quan, v\u00e0 c\u00f3 hai kh\u00eda c\u1ea1nh c\u1ee7a \u0111i\u1ec7n b\u1ea9n li\u00ean quan \u0111\u1ebfn d\u00f2ng s\u1ea3n ph\u1ea9m n\u00e0y.<\/p>\n

Kh\u00eda c\u1ea1nh \u0111\u1ea7u ti\u00ean l\u00e0 kh\u1ea3 n\u0103ng mi\u1ec5n nhi\u1ec5m. M\u1ed9t thi\u1ebft b\u1ecb d\u00f2ng r\u00f2 ho\u1ea1t \u0111\u1ed9ng tr\u00ean r\u00f2 r\u1ec9 t\u1ea7n s\u1ed1 cao \u0111ang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 mong \u0111\u1ee3i trong m\u1ed9t m\u1ea1ch sai, trong khi s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c s\u1ea3n ph\u1ea9m d\u1ef1a tr\u00ean l\u01b0\u1ee3ng nhi\u1ec5u m\u00e0 ch\u00fang c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c tr\u01b0\u1edbc khi \u0111i\u1ec1u n\u00e0y x\u1ea3y ra. C\u00e1c thi\u1ebft b\u1ecb RCBO \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ch cu\u1ed1i c\u00f9ng<\/a> c\u00f3 m\u1ed9t ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t t\u1ea7n s\u1ed1 cao c\u1ee5 th\u1ec3 v\u00e0 n\u00ean \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u thay v\u00ec gi\u1ea3 \u0111\u1ecbnh.<\/p>\n

Kh\u00eda c\u1ea1nh th\u1ee9 hai l\u00e0 cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i nguy\u00ean nh\u00e2n thay v\u00ec h\u1eadu qu\u1ea3. M\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n h\u1ed3 quang ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean k\u1ebft n\u1ed1i h\u1ed3 quang t\u1ea1o ra nhi\u1ec7t ho\u1eb7c nhi\u1ec5u b\u0103ng r\u1ed9ng. Vi\u1ec7c s\u1eed d\u1ee5ng an to\u00e0n m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch hi\u1ec7u qu\u1ea3 c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng qu\u00e1 t\u1ea3i m\u1ea1ch kh\u00f4ng bao gi\u1edd x\u1ea3y ra do thi\u1ebft b\u1ecb t\u1ea1o ra nhi\u1ec5u.<\/p>\n

Ch\u00fang t\u00f4i kh\u00f4ng b\u00e1n b\u1ed9 l\u1ecdc, v\u00e0 ch\u00fang t\u00f4i s\u1ebd nh\u1eafc l\u1ea1i r\u1eb1ng m\u1ed7i khi nhi\u1ec5u \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh thay v\u00ec b\u1ea3o v\u1ec7. Cung c\u1ea5p \u0111i\u1ec7n s\u1ea1ch \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng th\u00f4ng qua ki\u1ec3m so\u00e1t ngu\u1ed3n, c\u00e1ch ly v\u00e0 n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch. Vi\u1ec7c tri\u1ec3n khai m\u1ed9t thi\u1ebft b\u1ecb t\u1ea1i b\u1ea3ng ph\u00e2n ph\u1ed1i ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a b\u1ee9c tranh t\u1ed5ng th\u1ec3.<\/p>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 lo\u1ea1i b\u1ecf \u0111i\u1ec7n b\u1ea9n?<\/h3>\n

L\u00e0m s\u1ea1ch \u0111i\u1ec7n c\u1ee7a b\u1ea1n c\u00f3 ngh\u0129a l\u00e0 lo\u1ea1i b\u1ecf c\u00e1c t\u1ea7n s\u1ed1 trong d\u00f2ng \u0111i\u1ec7n th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb t\u1ea1o ra \u0111i\u1ec7n \u00e1p ho\u1eb7c d\u00f2ng \u0111i\u1ec7n n\u0103ng l\u01b0\u1ee3ng kh\u00f4ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. B\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb \u0111i\u1ec7n n\u00e0o c\u0169ng th\u01b0\u1eddng t\u1ea1o ra m\u1ed9t s\u1ed1 h\u00e0i \u00e2m c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c, d\u00f9 \u0111\u00f3 l\u00e0 m\u00e1y t\u00ednh, t\u1ee7 l\u1ea1nh ho\u1eb7c b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb \u0111i\u1ec7n n\u00e0o kh\u00e1c. T\u00f3m l\u1ea1i, \u0111i\u1ec7n b\u1ea9n \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi c\u00e1c thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 kh\u00f4ng th\u01b0\u1eddng t\u1ea1o ra c\u00e1c h\u00e0i \u00e2m nh\u01b0 v\u1eady.<\/p>\n

L\u00e0m th\u1ebf n\u00e0o t\u00f4i c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf \u0111i\u1ec7n b\u1ea9n?<\/h3>\n

Vi\u1ec7c lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n \u0111i\u1ec7n b\u1ea9n l\u00e0 kh\u00f4ng th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y nh\u01b0ng b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c c\u00f3 th\u1ec3 c\u00f3 c\u1ee7a n\u00f3. N\u1ebfu b\u1ea1n lo ng\u1ea1i v\u1ec1 c\u00e1c v\u1ea5n \u0111\u1ec1 s\u1ee9c kh\u1ecfe li\u00ean quan \u0111\u1ebfn tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb, b\u1ea1n ch\u1eafc ch\u1eafn n\u00ean c\u00e2n nh\u1eafc vi\u1ec7c s\u1eed d\u1ee5ng \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, c\u00f3 k\u1ebft n\u1ed1i wi-fi t\u1ea1i nh\u00e0 v\u00e0 th\u1ef1c hi\u1ec7n nhi\u1ec1u vi\u1ec7c kh\u00e1c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111i\u1ec7n.<\/p>\n

Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c gi\u1ea3m t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u1ee9c \u0111i\u1ec7n b\u1ea9n, b\u1ea1n c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch n\u00e2ng c\u1ea5p h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u1ee7a m\u00ecnh nh\u01b0 \u0111\u00e3 ch\u1ec9 ra \u1edf tr\u00ean, t\u1eaft b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb kh\u00f4ng c\u1ea7n thi\u1ebft n\u00e0o, hi\u1ec7u ch\u1ec9nh l\u1ea1i h\u1ec7 th\u1ed1ng bi\u1ebfn \u00e1p c\u1ee7a b\u1ea1n, \u0111i\u1ec1u ch\u1ec9nh thi\u1ebft b\u1ecb sao cho ch\u00fang ti\u00eau th\u1ee5 \u00edt \u0111i\u1ec7n nh\u1ea5t c\u00f3 th\u1ec3, t\u1ee9c l\u00e0 \u0111\u1ea3m b\u1ea3o b\u1ea1n c\u00f3 n\u1ed1i \u0111\u1ea5t th\u00edch h\u1ee3p v\u00e0 s\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc. Cu\u1ed1i c\u00f9ng, n\u1ebfu kh\u00f4ng c\u00f3 gi\u1ea3i ph\u00e1p n\u00e0o \u1edf tr\u00ean th\u1ecfa m\u00e3n, th\u00ec kh\u00f4ng c\u00f2n l\u1ef1a ch\u1ecdn n\u00e0o kh\u00e1c ngo\u00e0i vi\u1ec7c g\u1ecdi chuy\u00ean gia.<\/p>\n

Ngu\u1ed3n g\u00e2y ra nhi\u1ec5u \u0111i\u1ec7n t\u1ea7n s\u1ed1 cao chi\u1ebfm \u01b0u th\u1ebf trong ngu\u1ed3n \u0111i\u1ec7n \u00e1p v\u00e0 t\u00edn hi\u1ec7u d\u00f2ng \u0111i\u1ec7n tr\u00ean c\u00e1c h\u00e0i \u00e2m ch\u1ee7 y\u1ebfu xu\u1ea5t ph\u00e1t t\u1eeb c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau bao g\u1ed3m b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED, \u0111\u1ed9ng c\u01a1 t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i v\u00e0 b\u1ed9 bi\u1ebfn t\u1ea7n. V\u1ea5n \u0111\u1ec1 ph\u00e1t sinh do th\u1ef1c t\u1ebf m\u1ed9t s\u1ed1 ng\u01b0\u1eddi d\u00f9ng \u0111\u00e3 bi\u1ebft g\u1ecdi m\u00e9o h\u00e0i v\u00e0 xung \u0111i\u1ec7n nh\u01b0 l\u00e0 nhi\u1ec5u \u0111i\u1ec7n. M\u1ed9t trong nh\u1eefng c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 xem x\u00e9t nhi\u1ec5u \u0111i\u1ec7n l\u00e0 hi\u1ec3u c\u00e1ch n\u00f3 li\u00ean quan \u0111\u1ebfn s\u1ef1 \u00f4 nhi\u1ec5m b\u00ecnh th\u01b0\u1eddng m\u00e0 vi\u1ec7c \u0111o l\u01b0\u1eddng kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n b\u1eb1ng b\u1ea5t k\u1ef3 \u0111\u1ed3ng h\u1ed3 \u0111o ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n ti\u00eau chu\u1ea9n n\u00e0o.<\/p>\n

C\u00f3 ph\u1ea3i c\u00f3 m\u1ed9t huy\u1ec1n tho\u1ea1i li\u00ean quan \u0111\u1ebfn \u0111i\u1ec7n b\u1ea9n kh\u00f4ng?<\/h3>\n

\u0110i\u1ec7n b\u1ea9n th\u1ef1c s\u1ef1 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 s\u1ee9c kh\u1ecfe. T\u1ed5 ch\u1ee9c Y t\u1ebf Th\u1ebf gi\u1edbi v\u00e0 c\u00e1c ch\u00ednh ph\u1ee7 v\u1eabn ch\u01b0a cung c\u1ea5p b\u1ea5t k\u1ef3 b\u1eb1ng ch\u1ee9ng nh\u1ea5t qu\u00e1n n\u00e0o r\u1eb1ng m\u1ee9c t\u00edch t\u1ee5 trong c\u00e1c t\u00f2a nh\u00e0 ch\u1ecbu tr\u00e1ch nhi\u1ec7m cho b\u1ea5t k\u1ef3 \u0111i\u1ec1u ki\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c tuy\u00ean b\u1ed1. H\u01a1n n\u1eefa, c\u0169ng ch\u01b0a c\u00f3 b\u1ea5t k\u1ef3 th\u1eed nghi\u1ec7m k\u00edch th\u00edch n\u00e0o x\u00e1c nh\u1eadn r\u1eb1ng ngay c\u1ea3 nh\u1eefng c\u00e1 nh\u00e2n nh\u1ea1y c\u1ea3m cao c\u0169ng c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c li\u1ec7u h\u1ecd c\u00f3 \u0111ang ti\u1ebfp x\u00fac v\u1edbi \u0111i\u1ec7n b\u1ea9n hay kh\u00f4ng. M\u1eb7c d\u00f9 c\u00f3 b\u1eb1ng ch\u1ee9ng v\u1ec1 c\u00e1c t\u00e1c \u0111\u1ed9ng k\u1ef9 thu\u1eadt, kh\u00f4ng c\u00f3 v\u1ee5 ki\u1ec7n n\u00e0o li\u00ean quan \u0111\u1ebfn c\u00e1c tuy\u00ean b\u1ed1 v\u1ec1 s\u1ee9c kh\u1ecfe, \u0111i\u1ec1u n\u00e0y l\u00e0m cho vi\u1ec7c truy\u1ec1n b\u00e1 tuy\u00ean b\u1ed1 k\u1ef9 thu\u1eadt th\u1ef1c s\u1ef1 tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n