{"id":14205,"date":"2021-11-25T12:58:18","date_gmt":"2021-11-25T12:58:18","guid":{"rendered":"https:\/\/pageloot.com\/?p=14205"},"modified":"2026-05-04T18:53:58","modified_gmt":"2026-05-04T18:53:58","slug":"how-barcode-scanner-works","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/barcode\/how-barcode-scanner-works\/","title":{"rendered":"M\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">B\u1ea1n \u0111\u00e3 bao gi\u1edd t\u1ef1 h\u1ecfi l\u00e0m th\u1ebf n\u00e0o m\u1ed9t thi\u1ebft b\u1ecb c\u1ea7m tay c\u00f3 th\u1ec3 d\u1ecbch ngay l\u1eadp t\u1ee9c m\u1ed9t lo\u1ea1t c\u00e1c v\u1ea1ch \u0111en th\u00e0nh gi\u00e1 v\u00e0 l\u1ecbch s\u1eed c\u1ee7a s\u1ea3n ph\u1ea9m ch\u01b0a? Nh\u1eadp li\u1ec7u th\u1ee7 c\u00f4ng d\u1eabn \u0111\u1ebfn l\u1ed7i th\u01b0\u1eddng xuy\u00ean v\u00e0 ch\u1eadm tr\u1ec5 \u0111\u00e1ng k\u1ec3 trong ho\u1ea1t \u0111\u1ed9ng h\u00e0ng ng\u00e0y c\u1ee7a b\u1ea1n. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch s\u1eed d\u1ee5ng \u00e1nh s\u00e1ng, c\u1ea3m bi\u1ebfn v\u00e0 ph\u1ea7n m\u1ec1m \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i c\u00e1c m\u1eabu v\u1eadt l\u00fd th\u00e0nh th\u00f4ng tin k\u1ef9 thu\u1eadt s\u1ed1 cho doanh nghi\u1ec7p c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-science-of-light-and-reflection\">Khoa h\u1ecdc v\u1ec1 \u00c1nh s\u00e1ng v\u00e0 Ph\u1ea3n x\u1ea1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 c\u01a1 b\u1ea3n, m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb quang h\u1ecdc \u0111\u1ecdc m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 s\u00e1ng v\u00e0 t\u1ed1i. Khi b\u1ea1n h\u01b0\u1edbng m\u00e1y qu\u00e9t v\u00e0o m\u00e3 v\u1ea1ch, n\u00f3 s\u1ebd chi\u1ebfu s\u00e1ng m\u1eabu b\u1eb1ng m\u1ed9t ngu\u1ed3n s\u00e1ng, th\u01b0\u1eddng l\u00e0 \u0111\u00e8n LED \u0111\u1ecf ho\u1eb7c tia laser. C\u00e1c v\u1ea1ch t\u1ed1i c\u1ee7a m\u00e3 h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng, trong khi c\u00e1c kho\u1ea3ng tr\u1eafng ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng tr\u1edf l\u1ea1i thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 ph\u1ea3n x\u1ea1 n\u00e0y \u0111\u01b0\u1ee3c m\u1ed9t c\u1ea3m bi\u1ebfn thu l\u1ea1i \u0111\u1ec3 \u0111o c\u01b0\u1eddng \u0111\u1ed9 \u00e1nh s\u00e1ng. B\u1ea1n c\u00f3 th\u1ec3 h\u00ecnh dung m\u00e1y qu\u00e9t gi\u1ed1ng nh\u01b0 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u1ecdc t\u1ed1c \u0111\u1ed9 cao nh\u00ecn th\u1ea5y nh\u1eefng bi\u1ebfn th\u1ec3 n\u00e0y d\u01b0\u1edbi d\u1ea1ng m\u1ed9t chu\u1ed7i t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eed. Sau \u0111\u00f3, thi\u1ebft b\u1ecb d\u1ecbch c\u00e1c t\u00edn hi\u1ec7u n\u00e0y th\u00e0nh \u0111\u1ecbnh d\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1 kh\u1edbp v\u1edbi c\u00e1c ch\u1eef c\u00e1i ho\u1eb7c s\u1ed1 \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng m\u00e3. To\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra trong v\u00e0i mili gi\u00e2y, cho ph\u00e9p thu th\u1eadp d\u1eef li\u1ec7u nhanh ch\u00f3ng, \u0111i\u1ec1u c\u1ea7n thi\u1ebft trong b\u00e1n l\u1ebb v\u00e0 qu\u1ea3n l\u00fd kho h\u00e0ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-three-core-components-of-a-scanner\">Ba Th\u00e0nh ph\u1ea7n C\u1ed1t l\u00f5i c\u1ee7a M\u00e1y qu\u00e9t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ecdi m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch \u0111\u1ec1u d\u1ef1a v\u00e0o ba th\u00e0nh ph\u1ea7n ch\u00ednh \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng: h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng, c\u1ea3m bi\u1ebfn v\u00e0 b\u1ed9 gi\u1ea3i m\u00e3. H\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng cung c\u1ea5p \u00e1nh s\u00e1ng c\u1ea7n thi\u1ebft \u0111\u1ec3 nh\u00ecn th\u1ea5y m\u1eabu, trong khi c\u1ea3m bi\u1ebfn \u2013 th\u01b0\u1eddng l\u00e0 \u0111i\u1ed1t quang ho\u1eb7c Thi\u1ebft b\u1ecb gh\u00e9p \u0111i\u1ec7n t\u00edch (CCD) \u2013 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 \u201cm\u1eaft\u201d thu nh\u1eadn \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/barcode-scanner-infographic-3ea522-63ded8f5e65c.webp\" alt=\"Quy tr\u00ecnh qu\u00e9t m\u00e3 v\u1ea1ch\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u1ea3m bi\u1ebfn thu th\u1eadp d\u1eef li\u1ec7u \u00e1nh s\u00e1ng, b\u1ed9 gi\u1ea3i m\u00e3 s\u1ebd ti\u1ebfp qu\u1ea3n. B\u1ed9 gi\u1ea3i m\u00e3 l\u00e0 m\u1ed9t thu\u1eadt to\u00e1n ph\u1ea7n m\u1ec1m di\u1ec5n gi\u1ea3i m\u1eabu v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh v\u0103n b\u1ea3n c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c. Th\u00f4ng tin \u0111\u00e3 chuy\u1ec3n \u0111\u1ed5i n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n, h\u1ec7 th\u1ed1ng n\u00e0y s\u1ebd \u0111\u1ed1i chi\u1ebfu m\u00e3 v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u. V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng m\u1ed9t <a href=\"https:\/\/pageloot.com\/vi\/barcode-scanner\/\">m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch tr\u1ef1c tuy\u1ebfn<\/a>, ph\u1ea7n m\u1ec1m s\u1ebd x\u1eed l\u00fd h\u00ecnh \u1ea3nh b\u1ea1n t\u1ea3i l\u00ean ho\u1eb7c ch\u1ee5p \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c chi ti\u1ebft s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong th\u01b0 vi\u1ec7n k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a n\u00f3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-comparing-different-barcode-scanning-technologies\">So s\u00e1nh c\u00e1c C\u00f4ng ngh\u1ec7 Qu\u00e9t M\u00e3 v\u1ea1ch Kh\u00e1c nhau<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c m\u00e1y qu\u00e9t \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng theo c\u00f9ng m\u1ed9t c\u00e1ch, v\u00e0 c\u00f4ng ngh\u1ec7 b\u1ea1n ch\u1ecdn ph\u1ee5 thu\u1ed9c v\u00e0o m\u00f4i tr\u01b0\u1eddng kinh doanh c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n. Hi\u1ec3u r\u00f5 <a href=\"https:\/\/pageloot.com\/vi\/how-to\/qr-code-and-barcode-works\/\">c\u00e1ch m\u00e3 QR v\u00e0 m\u00e3 v\u1ea1ch ho\u1ea1t \u0111\u1ed9ng<\/a> kh\u00e1c nhau c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ch\u1ecdn ph\u1ea7n c\u1ee9ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>  M\u00e1y qu\u00e9t Laser s\u1eed d\u1ee5ng tia laser v\u00e0 m\u1ed9t lo\u1ea1t g\u01b0\u01a1ng dao \u0111\u1ed9ng \u0111\u1ec3 qu\u00e9t qua l\u1ea1i m\u00e3 v\u1ea1ch. Ch\u00fang ph\u1ed5 bi\u1ebfn trong b\u00e1n l\u1ebb v\u00ec ch\u00fang c\u00f3 th\u1ec3 \u0111\u1ecdc m\u00e3 t\u1eeb kho\u1ea3ng c\u00e1ch v\u00e0i m\u00e9t.<\/li>\n\n\n\n<li>  \u0110\u1ea7u \u0111\u1ecdc CCD, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00e1y qu\u00e9t LED, s\u1eed d\u1ee5ng m\u1ed9t m\u1ea3ng g\u1ed3m h\u00e0ng tr\u0103m c\u1ea3m bi\u1ebfn \u00e1nh s\u00e1ng nh\u1ecf. Ch\u00fang r\u1ea5t ch\u00ednh x\u00e1c nh\u01b0ng th\u01b0\u1eddng y\u00eau c\u1ea7u gi\u1eef m\u00e1y qu\u00e9t r\u1ea5t g\u1ea7n m\u00e3 v\u1ea1ch.<\/li>\n\n\n\n<li>  \u0110\u1ea7u \u0111\u1ecdc d\u1ea1ng b\u00fat bao g\u1ed3m m\u1ed9t ngu\u1ed3n s\u00e1ng v\u00e0 m\u1ed9t \u0111i\u1ed1t quang \u1edf \u0111\u1ea7u b\u00fat. B\u1ea1n ph\u1ea3i vu\u1ed1t b\u00fat qua m\u00e3 v\u1ea1ch v\u1edbi t\u1ed1c \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 \u0111\u1ecdc ch\u00ednh x\u00e1c, \u0111i\u1ec1u n\u00e0y khi\u1ebfn ch\u00fang \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n trong c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn.<\/li>\n\n\n\n<li>  M\u00e1y qu\u00e9t d\u1ef1a tr\u00ean camera s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 h\u00ecnh \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u1ec3 ch\u1ee5p \u1ea3nh m\u00e3. Ch\u00fang ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn v\u00ec c\u00f3 th\u1ec3 \u0111\u1ecdc m\u00e3 v\u1ea1ch t\u1eeb m\u1ecdi g\u00f3c \u0111\u1ed9 v\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 qu\u00e9t c\u00e1c m\u1eabu hai chi\u1ec1u.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>\u0110\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c qu\u1ea3n l\u00fd kho c\u1ee7a b\u1ea1n<\/strong> C\u1ea7n qu\u00e9t m\u00e3 v\u1ea1ch ho\u1eb7c m\u00e3 QR nhanh ch\u00f3ng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea7n c\u1ee9ng \u0111\u1eaft ti\u1ec1n? S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 c\u1ee7a ch\u00fang t\u00f4i <a href=\"https:\/\/pageloot.com\/vi\/qr-code-scanner\/\">m\u00e1y qu\u00e9t m\u00e3 QR mi\u1ec5n ph\u00ed<\/a> \u0111\u1ec3 bi\u1ebfn b\u1ea5t k\u1ef3 \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh ho\u1eb7c m\u00e1y t\u00ednh \u0111\u1ec3 b\u00e0n n\u00e0o th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 thu th\u1eadp d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-quiet-zones-are-essential-for-scannability\">T\u1ea1i sao v\u00f9ng y\u00ean t\u0129nh l\u1ea1i c\u1ea7n thi\u1ebft cho kh\u1ea3 n\u0103ng qu\u00e9t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t ph\u1ea7n quan tr\u1ecdng nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua c\u1ee7a m\u00e3 v\u1ea1ch l\u00e0 \u201cv\u00f9ng y\u00ean t\u0129nh\u201d. \u0110\u00e2y l\u00e0 khu v\u1ef1c r\u00f5 r\u00e0ng, kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u bao quanh m\u00e3 v\u1ea1ch \u1edf t\u1ea5t c\u1ea3 c\u00e1c m\u1eb7t. Kho\u1ea3ng tr\u1ed1ng n\u00e0y cho m\u00e1y qu\u00e9t bi\u1ebft m\u00e3 b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac \u1edf \u0111\u00e2u, ng\u0103n kh\u00f4ng cho n\u00f3 v\u00f4 t\u00ecnh nh\u1eadn v\u0103n b\u1ea3n ho\u1eb7c \u0111\u1ed3 h\u1ecda t\u1eeb bao b\u00ec xung quanh.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1024\" height=\"887\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/barcode-quiet-zones-7e5a9a-0457e177176c-e1777920773903.webp\" alt=\"V\u00f9ng y\u00ean t\u0129nh c\u1ee7a m\u00e3 v\u1ea1ch\" class=\"wp-image-53297\" srcset=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/barcode-quiet-zones-7e5a9a-0457e177176c-e1777920773903.webp 1024w, https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/barcode-quiet-zones-7e5a9a-0457e177176c-e1777920773903-300x260.webp 300w, https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/barcode-quiet-zones-7e5a9a-0457e177176c-e1777920773903-768x665.webp 768w, https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/barcode-quiet-zones-7e5a9a-0457e177176c-e1777920773903-14x12.webp 14w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n m\u1ea5t kho\u1ea3ng tr\u1ed1ng n\u00e0y ho\u1eb7c n\u1ebfu n\u00f3 b\u1ecb che khu\u1ea5t b\u1edfi nh\u00e3n d\u00e1n, m\u00e1y qu\u00e9t c\u00f3 th\u1ec3 kh\u00f4ng nh\u1eadn d\u1ea1ng \u0111\u01b0\u1ee3c m\u1eabu. \u0110\u1ed1i v\u1edbi m\u00e3 v\u1ea1ch 2D, t\u1ed1t nh\u1ea5t l\u00e0 gi\u1eef v\u00f9ng y\u00ean t\u0129nh c\u00f3 c\u00f9ng m\u00e0u v\u1edbi n\u1ec1n c\u1ee7a m\u00e3. \u0110\u1ea3m b\u1ea3o m\u1ed9t l\u1ec1 r\u00f5 r\u00e0ng l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch d\u1ec5 nh\u1ea5t \u0111\u1ec3 c\u1ea3i thi\u1ec7n t\u1ef7 l\u1ec7 qu\u00e9t th\u00e0nh c\u00f4ng c\u1ee7a b\u1ea1n, \u0111\u1eb7c bi\u1ec7t khi b\u1ea1n \u0111ang h\u1ecdc <a href=\"https:\/\/pageloot.com\/vi\/barcode\/how-to-make-barcode\/\">c\u00e1ch t\u1ea1o m\u00e3 v\u1ea1ch<\/a> cho c\u00e1c s\u1ea3n ph\u1ea9m m\u1edbi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-scanning-1d-barcodes-vs-2d-qr-codes\">Qu\u00e9t m\u00e3 v\u1ea1ch 1D so v\u1edbi m\u00e3 QR 2D<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lo\u1ea1i m\u00e1y qu\u00e9t b\u1ea1n c\u1ea7n ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o vi\u1ec7c b\u1ea1n \u0111ang s\u1eed d\u1ee5ng m\u00e3 v\u1ea1ch 1D truy\u1ec1n th\u1ed1ng hay m\u00e3 2D nh\u01b0 m\u00e3 QR. M\u00e1y qu\u00e9t laser ti\u00eau chu\u1ea9n ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u1ecdc m\u00e3 v\u1ea1ch 1D v\u00ec n\u00f3 qu\u00e9t theo m\u1ed9t \u0111\u01b0\u1eddng ngang duy nh\u1ea5t. N\u00f3 kh\u00f4ng th\u1ec3 gi\u1ea3i th\u00edch c\u00e1c m\u1eabu d\u1eef li\u1ec7u d\u1ecdc \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong m\u00e3 2D.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ecdc c\u00e1c m\u1eabu 2D, b\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng m\u00e1y qu\u00e9t d\u1ef1a tr\u00ean h\u00ecnh \u1ea3nh. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y ch\u1ee5p \u1ea3nh hai chi\u1ec1u v\u00e0 s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p \u0111\u1ec3 gi\u1ea3i m\u00e3 th\u00f4ng tin c\u1ea3 theo chi\u1ec1u ngang v\u00e0 chi\u1ec1u d\u1ecdc. N\u1ebfu doanh nghi\u1ec7p c\u1ee7a b\u1ea1n c\u1ea7n l\u01b0u tr\u1eef nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n, ch\u1eb3ng h\u1ea1n nh\u01b0 URL ho\u1eb7c th\u00f4ng tin li\u00ean h\u1ec7, th\u00ec m\u1ed9t <a href=\"https:\/\/pageloot.com\/vi\/barcode\/barcode-vs-qr-code\/\">so s\u00e1nh m\u00e3 v\u1ea1ch v\u00e0 m\u00e3 QR<\/a> s\u1ebd cho th\u1ea5y m\u00e3 QR cung c\u1ea5p dung l\u01b0\u1ee3ng cao h\u01a1n nhi\u1ec1u v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ed7i t\u1ed1t h\u01a1n cho nhu c\u1ea7u ti\u1ebfp th\u1ecb v\u00e0 theo d\u00f5i c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-some-barcodes-fail-to-scan\">T\u1ea1i sao m\u1ed9t s\u1ed1 m\u00e3 v\u1ea1ch kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 v\u1edbi thi\u1ebft b\u1ecb ch\u1ea5t l\u01b0\u1ee3ng cao, b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i c\u00e1c m\u00e3 v\u1ea1ch kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y hi\u1ebfm khi l\u00e0 l\u1ed7i c\u1ee7a ph\u1ea7n c\u1ee9ng m\u00e0 th\u01b0\u1eddng do c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng ho\u1eb7c thi\u1ebft k\u1ebf. \u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p gi\u1eefa c\u00e1c thanh v\u00e0 n\u1ec1n l\u00e0 m\u1ed9t nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn; n\u1ebfu n\u1ec1n qu\u00e1 t\u1ed1i, c\u1ea3m bi\u1ebfn kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c thanh v\u1edbi c\u00e1c kho\u1ea3ng tr\u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn kh\u00e1c bao g\u1ed3m m\u00e3 v\u1ea1ch \u0111\u01b0\u1ee3c in qu\u00e1 nh\u1ecf so v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a m\u00e1y qu\u00e9t ho\u1eb7c m\u00e3 b\u1ecb bi\u1ebfn d\u1ea1ng do v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i. H\u01b0 h\u1ecfng v\u1eadt l\u00fd, ch\u1eb3ng h\u1ea1n nh\u01b0 v\u1ebft x\u01b0\u1edbc ho\u1eb7c m\u1ef1c b\u1ecb lem trong qu\u00e1 tr\u00ecnh in, c\u0169ng c\u00f3 th\u1ec3 ph\u00e1 v\u1ee1 m\u1eabu m\u00e0 b\u1ed9 gi\u1ea3i m\u00e3 \u0111ang t\u00ecm ki\u1ebfm. \u0110\u1ea3m b\u1ea3o in ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 chi\u1ebfu s\u00e1ng ph\u00f9 h\u1ee3p trong kh\u00f4ng gian l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n s\u1ebd gi\u1ea3i quy\u1ebft ph\u1ea7n l\u1edbn c\u00e1c th\u00e1ch th\u1ee9c qu\u00e9t n\u00e0y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-e34a863c181b\"><strong class=\"schema-faq-question\">C\u00f3 m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch n\u00e0o c\u00f3 th\u1ec3 \u0111\u1ecdc m\u00e3 QR kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng. M\u00e1y qu\u00e9t laser 1D ti\u00eau chu\u1ea9n ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u1ecdc m\u00e3 v\u1ea1ch tuy\u1ebfn t\u00ednh. \u0110\u1ec3 \u0111\u1ecdc m\u00e3 QR, b\u1ea1n c\u1ea7n m\u1ed9t m\u00e1y qu\u00e9t d\u1ef1a tr\u00ean h\u00ecnh \u1ea3nh ho\u1eb7c camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh c\u00f3 th\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u hai chi\u1ec1u.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-83b47daaa836\"><strong class=\"schema-faq-question\">M\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch c\u00f3 c\u1ea7n ph\u1ea7n m\u1ec1m c\u1ee5 th\u1ec3 \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">H\u1ea7u h\u1ebft c\u00e1c m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch USB \u0111\u1ec1u l\u00e0 \u201cc\u1eafm v\u00e0 ch\u1ea1y\u201d, ngh\u0129a l\u00e0 ch\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t b\u00e0n ph\u00edm v\u00e0 nh\u1eadp d\u1eef li\u1ec7u v\u00e0o b\u1ea5t k\u1ef3 ch\u01b0\u01a1ng tr\u00ecnh n\u00e0o b\u1ea1n \u0111ang m\u1edf. Tuy nhi\u00ean, ph\u1ea7n m\u1ec1m qu\u1ea3n l\u00fd kho ho\u1eb7c ph\u1ea7n m\u1ec1m b\u00e1n h\u00e0ng chuy\u00ean d\u1ee5ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu c\u00e1c s\u1ed1 \u0111\u00f3 v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-cbff88b28d9f\"><strong class=\"schema-faq-question\">T\u1ea1i sao m\u00e1y qu\u00e9t c\u1ee7a t\u00f4i g\u1eb7p kh\u00f3 kh\u0103n khi \u0111\u1ecdc m\u00e3 d\u01b0\u1edbi \u00e1nh n\u1eafng ch\u00f3i chang?<\/strong> <p class=\"schema-faq-answer\">\u00c1nh s\u00e1ng m\u00f4i tr\u01b0\u1eddng qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 l\u00e0m m\u1edd ph\u1ea3n x\u1ea1 m\u00e0 c\u1ea3m bi\u1ebfn c\u1ee7a m\u00e1y qu\u00e9t \u0111ang c\u1ed1 g\u1eafng \u0111o. N\u1ebfu c\u00f3 qu\u00e1 nhi\u1ec1u \u00e1nh s\u00e1ng, c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 kh\u00f4ng ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c gi\u1eefa \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 t\u1eeb m\u00e3 v\u1ea1ch v\u00e0 \u00e1nh s\u00e1ng t\u1eeb m\u00f4i tr\u01b0\u1eddng.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch s\u1eed d\u1ee5ng \u00e1nh s\u00e1ng, c\u1ea3m bi\u1ebfn v\u00e0 b\u1ed9 gi\u1ea3i m\u00e3 \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i c\u00e1c m\u1eabu th\u00e0nh d\u1eef li\u1ec7u s\u1ed1. Kh\u00e1m ph\u00e1 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00f4ng ngh\u1ec7 laser, CCD v\u00e0 h\u00ecnh \u1ea3nh.<\/p>","protected":false},"author":17,"featured_media":53205,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[2602],"tags":[],"class_list":["post-14205","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-barcode"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How Does a Barcode Scanner Work?<\/title>\n<meta name=\"description\" content=\"Learn how barcode scanners use light, sensors, and decoders to convert patterns into digital data. 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Siim c\u00f3 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt s\u1ed1 s\u00e2u r\u1ed9ng v\u1edbi h\u01a1n 10 n\u0103m kinh nghi\u1ec7m v\u1eefng ch\u1eafc trong l\u0129nh v\u1ef1c Ph\u1ea7n m\u1ec1m d\u01b0\u1edbi d\u1ea1ng d\u1ecbch v\u1ee5 (SaaS), m\u1ed9t minh ch\u1ee9ng cho ki\u1ebfn th\u1ee9c s\u00e2u r\u1ed9ng c\u1ee7a \u00f4ng v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt s\u1ed1.","sameAs":["https:\/\/www.linkedin.com\/in\/siim-tiigimagi\/"]},{"@type":"Question","@id":"https:\/\/pageloot.com\/barcode\/how-barcode-scanner-works\/#faq-question-e34a863c181b","position":1,"url":"https:\/\/pageloot.com\/barcode\/how-barcode-scanner-works\/#faq-question-e34a863c181b","name":"C\u00f3 m\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch n\u00e0o c\u00f3 th\u1ec3 \u0111\u1ecdc m\u00e3 QR kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"No. Standard 1D laser scanners can only read linear barcodes. To read QR codes, you need an image-based scanner or a smartphone camera that can process two-dimensional data.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/barcode\/how-barcode-scanner-works\/#faq-question-83b47daaa836","position":2,"url":"https:\/\/pageloot.com\/barcode\/how-barcode-scanner-works\/#faq-question-83b47daaa836","name":"M\u00e1y qu\u00e9t m\u00e3 v\u1ea1ch c\u00f3 c\u1ea7n ph\u1ea7n m\u1ec1m c\u1ee5 th\u1ec3 \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Most USB barcode scanners are u005cu0022plug-and-play,u005cu0022 meaning they act like a keyboard and type the data into whatever program you have open. However, specialized inventory or point-of-sale software is often used to match those numbers to specific products.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/barcode\/how-barcode-scanner-works\/#faq-question-cbff88b28d9f","position":3,"url":"https:\/\/pageloot.com\/barcode\/how-barcode-scanner-works\/#faq-question-cbff88b28d9f","name":"T\u1ea1i sao m\u00e1y qu\u00e9t c\u1ee7a t\u00f4i g\u1eb7p kh\u00f3 kh\u0103n khi \u0111\u1ecdc m\u00e3 d\u01b0\u1edbi \u00e1nh n\u1eafng ch\u00f3i chang?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Excessive ambient light can wash out the reflection that the scanner's sensor is trying to measure. If there is too much light, the sensor may not be able to distinguish between the light reflected from the barcode and the light from the environment.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/14205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/comments?post=14205"}],"version-history":[{"count":3,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/14205\/revisions"}],"predecessor-version":[{"id":53914,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/14205\/revisions\/53914"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media\/53205"}],"wp:attachment":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media?parent=14205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/categories?post=14205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/tags?post=14205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}