{"id":678226,"date":"2024-08-29T01:48:52","date_gmt":"2024-08-29T00:48:52","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=678226"},"modified":"2024-08-29T01:48:52","modified_gmt":"2024-08-29T00:48:52","slug":"khao-sat-khuyet-tat-duoi-be-mat-bang-hinh-anh-song-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/khao-sat-khuyet-tat-duoi-be-mat-bang-hinh-anh-song-nhiet\/","title":{"rendered":"Kh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t"},"content":{"rendered":"

Kh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t gi\u00fap ph\u00e1t hi\u1ec7n l\u1ed7i v\u1eadt li\u1ec7u \u1ea9n, \u0111\u1ea3m b\u1ea3o an to\u00e0n c\u1ea5u tr\u00fac b\u1eb1ng c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn kh\u00f4ng x\u00e2m l\u1ea5n.<\/p>\n

\"Kh\u1ea3o<\/p>\n

Kh\u1ea3o S\u00e1t Khuy\u1ebft T\u1eadt D\u01b0\u1edbi B\u1ec1 M\u1eb7t B\u1eb1ng H\u00ecnh \u1ea2nh S\u00f3ng Nhi\u1ec7t<\/h2>\n

Trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 \u0111\u00e1nh gi\u00e1 khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 \u0111\u1ec3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y l\u00e0 s\u1eed d\u1ee5ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y t\u1eadn d\u1ee5ng s\u1ef1 ph\u00e1t t\u00e1n nhi\u1ec7t \u0111\u1ed9 v\u00e0 s\u1ef1 ph\u1ea3n x\u1ea1 nhi\u1ec7t \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng d\u01b0\u1edbi b\u1ec1 m\u1eb7t.<\/p>\n

Nguy\u00ean L\u00fd C\u01a1 B\u1ea3n<\/h2>\n

H\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t (Thermography) l\u00e0 k\u1ef9 thu\u1eadt s\u1eed d\u1ee5ng c\u00e1c camera h\u1ed3ng ngo\u1ea1i \u0111\u1ec3 \u0111o l\u01b0\u1eddng s\u1ef1 ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt th\u1ec3. Khi m\u1ed9t v\u1eadt li\u1ec7u b\u1ecb l\u00e0m n\u00f3ng, c\u00e1c khuy\u1ebft t\u1eadt b\u00ean trong s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch m\u00e0 nhi\u1ec7t \u0111\u1ed9 ph\u00e2n b\u1ed1 v\u00e0 lan truy\u1ec1n qua v\u1eadt li\u1ec7u \u0111\u00f3. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra c\u00e1c bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n b\u1eb1ng camera h\u1ed3ng ngo\u1ea1i.<\/p>\n

Quy Tr\u00ecnh Kh\u1ea3o S\u00e1t<\/h2>\n
    \n
  1. \u0110\u1ea7u ti\u00ean, v\u1eadt li\u1ec7u c\u1ea7n ki\u1ec3m tra \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng b\u1eb1ng m\u1ed9t ngu\u1ed3n nhi\u1ec7t (nh\u01b0 \u0111\u00e8n halogen hay tia laser).<\/li>\n
  2. Sau khi ngu\u1ed3n nhi\u1ec7t t\u00e1c \u0111\u1ed9ng, camera h\u1ed3ng ngo\u1ea1i s\u1ebd ghi l\u1ea1i s\u1ef1 ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9 tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u theo th\u1eddi gian.<\/li>\n
  3. H\u00ecnh \u1ea3nh nhi\u1ec7t \u0111\u1ed9 thu \u0111\u01b0\u1ee3c s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 \u0111\u1ecbnh v\u1ecb c\u00e1c khuy\u1ebft t\u1eadt b\u00ean trong.<\/li>\n<\/ol>\n

    C\u00f4ng Th\u1ee9c C\u01a1 B\u1ea3n<\/h2>\n

    Ph\u01b0\u01a1ng tr\u00ecnh d\u1eabn nhi\u1ec7t c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh truy\u1ec1n nhi\u1ec7t Fourier:<\/p>\n

    \\[ q = -k \\cdot \\nabla T \\]\n

    Trong \u0111\u00f3:<\/p>\n

      \n
    • q<\/i>: l\u01b0u l\u01b0\u1ee3ng nhi\u1ec7t (W\/m\u00b2)<\/li>\n
    • k<\/i>: h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u (W\/m\u00b7K)<\/li>\n
    • \\(\\nabla T\\): gradient nhi\u1ec7t \u0111\u1ed9 (K\/m)<\/li>\n<\/ul>\n

      \u01afu \u0110i\u1ec3m v\u00e0 Nh\u01b0\u1ee3c \u0110i\u1ec3m<\/h2>\n

      \u01afu \u0111i\u1ec3m:<\/b><\/p>\n

        \n
      • Kh\u00f4ng c\u1ea7n ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u.<\/li>\n
      • C\u00f3 th\u1ec3 ki\u1ec3m tra m\u1ed9t khu v\u1ef1c l\u1edbn m\u1ed9t c\u00e1ch nhanh ch\u00f3ng.<\/li>\n
      • Ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c c\u00e1c khu v\u1ef1c b\u1ecb \u1ea9n ho\u1eb7c d\u01b0\u1edbi b\u1ec1 m\u1eb7t.<\/li>\n<\/ul>\n

        Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/b><\/p>\n

          \n
        • \u0110\u1ed9 ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ea3 n\u0103ng ph\u00e2n gi\u1ea3i c\u1ee7a camera h\u1ed3ng ngo\u1ea1i.<\/li>\n
        • Kh\u00f3 ph\u00e1t hi\u1ec7n c\u00e1c khuy\u1ebft t\u1eadt r\u1ea5t nh\u1ecf ho\u1eb7c s\u00e2u b\u00ean trong v\u1eadt li\u1ec7u.<\/li>\n
        • C\u1ea7n ph\u1ea3i l\u00e0m n\u00f3ng v\u1eadt li\u1ec7u tr\u01b0\u1edbc khi ki\u1ec3m tra, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 kh\u00f4ng th\u1ef1c t\u1ebf trong m\u1ecdi tr\u01b0\u1eddng h\u1ee3p.<\/li>\n<\/ul>\n

          \u1ee8ng D\u1ee5ng Th\u1ef1c T\u1ebf<\/h2>\n

          H\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0:<\/p>\n

            \n
          • Ki\u1ec3m tra k\u1ebft c\u1ea5u v\u00e0 b\u1ea3o d\u01b0\u1ee1ng trong ng\u00e0nh h\u00e0ng kh\u00f4ng v\u00e0 t\u00e0u th\u1ee7y.<\/li>\n
          • Ph\u00e1t hi\u1ec7n khuy\u1ebft t\u1eadt trong ng\u00e0nh x\u00e2y d\u1ef1ng v\u00e0 c\u01a1 kh\u00ed.<\/li>\n
          • Ki\u1ec3m tra s\u1ef1 th\u1ea5t tho\u00e1t nhi\u1ec7t trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n v\u00e0 nhi\u1ec7t.<\/li>\n
          • \u1ee8ng d\u1ee5ng trong y h\u1ecdc \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 l\u01b0u th\u00f4ng m\u00e1u v\u00e0 ung th\u01b0.<\/li>\n<\/ul>\n

            Ph\u01b0\u01a1ng ph\u00e1p kh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t \u0111\u00e3 ch\u1ee9ng minh \u0111\u01b0\u1ee3c t\u00ednh hi\u1ec7u qu\u1ea3 v\u00e0 ti\u1ec7n d\u1ee5ng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p. V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 v\u00e0 thi\u1ebft b\u1ecb, k\u1ef9 thu\u1eadt n\u00e0y ng\u00e0y c\u00e0ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Kh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t gi\u00fap ph\u00e1t hi\u1ec7n l\u1ed7i v\u1eadt li\u1ec7u \u1ea9n, \u0111\u1ea3m b\u1ea3o an to\u00e0n c\u1ea5u tr\u00fac b\u1eb1ng c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn kh\u00f4ng x\u00e2m l\u1ea5n.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"\nKh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t<\/title>\n<meta name=\"description\" content=\"Kh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t gi\u00fap ph\u00e1t hi\u1ec7n l\u1ed7i v\u1eadt li\u1ec7u \u1ea9n, \u0111\u1ea3m b\u1ea3o an to\u00e0n c\u1ea5u tr\u00fac b\u1eb1ng c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn kh\u00f4ng x\u00e2m l\u1ea5n.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/vi\/khao-sat-khuyet-tat-duoi-be-mat-bang-hinh-anh-song-nhiet\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t\" \/>\n<meta property=\"og:description\" content=\"Kh\u1ea3o s\u00e1t khuy\u1ebft t\u1eadt d\u01b0\u1edbi b\u1ec1 m\u1eb7t b\u1eb1ng h\u00ecnh \u1ea3nh s\u00f3ng nhi\u1ec7t gi\u00fap ph\u00e1t hi\u1ec7n l\u1ed7i v\u1eadt li\u1ec7u \u1ea9n, \u0111\u1ea3m b\u1ea3o an to\u00e0n c\u1ea5u tr\u00fac b\u1eb1ng c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn kh\u00f4ng x\u00e2m l\u1ea5n.\" \/>\n<meta property=\"og:url\" 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class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\",\"url\":\"https:\/\/www.thermal-engineering.org\/fr\/\",\"name\":\"Thermal Engineering\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.thermal-engineering.org\/fr\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"vi-VN\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/vi\/khao-sat-khuyet-tat-duoi-be-mat-bang-hinh-anh-song-nhiet\/#primaryimage\",\"inLanguage\":\"vi-VN\",\"url\":\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/khao_sat_khuyet_tat_duoi_be_mat_bang_hinh_anh_song_nhiet.png\",\"width\":1000,\"height\":1000,\"caption\":\"Kh\\u1ea3o s\\u00e1t khuy\\u1ebft t\\u1eadt d\\u01b0\\u1edbi b\\u1ec1 m\\u1eb7t b\\u1eb1ng h\\u00ecnh \\u1ea3nh s\\u00f3ng 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