{"id":19839,"date":"2022-05-05T09:17:22","date_gmt":"2022-05-05T09:17:22","guid":{"rendered":"http:\/\/dgbellvietnam.com\/relative-humidity-on-performance-of-temperature-and-humidity-test-chamber\/"},"modified":"2024-10-25T14:59:00","modified_gmt":"2024-10-25T07:59:00","slug":"relative-humidity-on-performance-of-temperature-and-humidity-test-chamber","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/relative-humidity-on-performance-of-temperature-and-humidity-test-chamber\/","title":{"rendered":"\u0110\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i v\u1ec1 hi\u1ec7u su\u1ea5t c\u1ee7a bu\u1ed3ng th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m"},"content":{"rendered":"
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V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng nghi\u1ec7p v\u00e0 c\u00f4ng ngh\u1ec7 th\u00f4ng tin, th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng ng\u00e0y c\u00e0ng tr\u1edf th\u00e0nh ph\u01b0\u01a1ng ti\u1ec7n quan tr\u1ecdng \u0111\u1ec3 nhi\u1ec1u vi\u1ec7n nghi\u00ean c\u1ee9u khoa h\u1ecdc v\u00e0 nh\u00e0 m\u00e1y ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m. L\u00e0 m\u1ed9t trong nh\u1eefng thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 quan tr\u1ecdng nh\u1ea5t cho th\u1eed nghi\u1ec7m v\u00e0 nghi\u00ean c\u1ee9u m\u00f4i tr\u01b0\u1eddng, bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ng\u00e0y c\u00e0ng nhi\u1ec1u. Trong c\u00e1c t\u00e0i li\u1ec7u tr\u01b0\u1edbc \u0111\u00e2y v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n, c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh v\u1ec1 \u0111\u1ed9 l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m, dao \u0111\u1ed9ng, t\u1ed1c \u0111\u1ed9 t\u0103ng gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 v\u00e0 t\u1ed1c \u0111\u1ed9 gi\u00f3, v.v. bu\u1ed3ng th\u1eed \u0111\u1ed9 \u1ea9m \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn nhi\u1ec1u, nh\u01b0ng kh\u00f4ng c\u00f3 nhi\u1ec1u nghi\u00ean c\u1ee9u v\u1ec1 t\u00ednh \u0111\u1ed3ng nh\u1ea5t. D\u1ef1a tr\u00ean t\u00ecnh h\u00ecnh tr\u00ean, b\u00e0i b\u00e1o n\u00e0y c\u1ea3i thi\u1ec7n t\u00ednh \u0111\u1ed3ng nh\u1ea5t b\u1eb1ng c\u00e1ch t\u0103ng \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i trong bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m v\u00e0 x\u00e1c minh \u1ea3nh h\u01b0\u1edfng c\u1ee7a vi\u1ec7c t\u0103ng \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ebfn truy\u1ec1n nhi\u1ec7t, cung c\u1ea5p m\u1ed9t tham chi\u1ebfu nh\u1ea5t \u0111\u1ecbnh cho vi\u1ec7c hi\u1ec7u chu\u1ea9n <\/span><\/span>bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m.<\/span><\/span><\/a><\/p>\n

1 C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng<\/span><\/span><\/strong><\/span><\/h1>\n
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  • 1.1 C\u1ea5u tr\u00fac bu\u1ed3ng<\/span><\/span><\/span><\/li>\n<\/ul>\n

    Do bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m c\u00f3 c\u1ea5u tr\u00fac th\u00e0nh b\u00ean trong kh\u00e1c nhau n\u00ean nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m c\u1ee7a t\u1eebng b\u1ed9 ph\u1eadn th\u00e0nh b\u00ean trong c\u1ee7a bu\u1ed3ng th\u1eed c\u0169ng kh\u00e1c nhau, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 \u0111\u1ed1i l\u01b0u nhi\u1ec7t trong ph\u00f2ng th\u00ed nghi\u1ec7m, d\u1eabn \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m b\u00ean trong c\u00f3 \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 \u0111\u1ed9 l\u1ec7ch kh\u00e1c nhau.<\/span><\/span><\/p>\n

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    • 1.2 T\u1ea3i nhi\u1ec7t<\/span><\/span><\/span><\/li>\n<\/ul>\n

      M\u1ed9t s\u1ed1 t\u1ea3i tr\u1ecdng ph\u00e1t s\u00e1ng v\u00e0 nhi\u1ec7t \u0111\u1eb7t b\u00ean trong bu\u1ed3ng th\u1eed nghi\u1ec7m ho\u1eb7c m\u1eabu th\u1eed nghi\u1ec7m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 \u0111\u1ed1i l\u01b0u nhi\u1ec7t b\u00ean trong t\u1ed5ng th\u1ec3 s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m b\u00ean trong. Theo c\u00e1c ti\u00eau chu\u1ea9n c\u00f3 li\u00ean quan, theo m\u1eb7c \u0111\u1ecbnh, t\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m c\u1ee7a bu\u1ed3ng th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m ph\u1ea3i \u0111\u01b0\u1ee3c \u0111o \u1edf ch\u1ebf \u0111\u1ed9 kh\u00f4ng t\u1ea3i.<\/span><\/span><\/p>\n

        \n
      • 1.3 Truy\u1ec1n nhi\u1ec7t<\/span><\/span><\/span>
        \n Do h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t c\u1ee7a s\u00e1u m\u1eb7t tr\u01b0\u1edbc, sau, tr\u00e1i, tr\u00ean v\u00e0 d\u01b0\u1edbi c\u1ee7a th\u00e0nh trong bu\u1ed3ng th\u1eed nghi\u1ec7m kh\u00e1c nhau v\u00e0 c\u00f3 c\u00e1c l\u1ed7 ph\u00e1t hi\u1ec7n, l\u1ed7 ren v\u00e0 l\u1ed7 th\u1eed nghi\u1ec7m \u1edf b\u00ean h\u00f4ng m\u1ed9t s\u1ed1 th\u00e0nh bu\u1ed3ng n\u00ean s\u1ebd c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng t\u1ea3n nhi\u1ec7t v\u00e0 truy\u1ec1n nhi\u1ec7t \u1edf m\u1ed9t s\u1ed1 b\u1ed9 ph\u1eadn c\u1ee7a bu\u1ed3ng th\u1eed nghi\u1ec7m, d\u1eabn \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 trong bu\u1ed3ng kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, d\u1eabn \u0111\u1ebfn s\u1ef1 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u do th\u00e0nh bu\u1ed3ng b\u1ee9c x\u1ea1, \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn t\u00ednh \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a nhi\u1ec7t \u0111\u1ed9.<\/span><\/span><\/li>\n<\/ul>\n
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        • 1.4 B\u1ee9c x\u1ea1 nhi\u1ec7t<\/span><\/span><\/span>
          \n Thi\u1ebft k\u1ebf kh\u00f4ng gian v\u00e0 c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a bu\u1ed3ng th\u1eed nghi\u1ec7m, ch\u1eb3ng h\u1ea1n nh\u01b0 v\u1ecb tr\u00ed \u0111\u1eb7t \u1ed1ng s\u01b0\u1edfi, thi\u1ebft k\u1ebf, c\u00f4ng su\u1ea5t v\u00e0 v\u1ecb tr\u00ed c\u1ee7a \u1ed1ng d\u1eabn kh\u00ed, kh\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n \u0111\u1ed3ng nh\u1ea5t v\u00e0 \u0111\u1ed1i x\u1ee9ng, \u0111i\u1ec1u n\u00e0y ch\u1eafc ch\u1eafn s\u1ebd d\u1eabn \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u b\u00ean trong bu\u1ed3ng. <\/span><\/span>
          \n1.5 V\u1ecb tr\u00ed v\u00e0 th\u1ec3 t\u00edch c\u1ee7a m\u1eabu th\u1eed <\/span><\/span>
          \nV\u1ecb tr\u00ed kh\u00f4ng h\u1ee3p l\u00fd c\u1ee7a m\u1eabu th\u1eed ho\u1eb7c th\u1ec3 t\u00edch m\u1eabu qu\u00e1 l\u1edbn s\u1ebd c\u1ea3n tr\u1edf s\u1ef1 \u0111\u1ed1i l\u01b0u nhi\u1ec7t c\u1ee7a kh\u00f4ng kh\u00ed trong bu\u1ed3ng, do \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m. V\u00ed d\u1ee5, \u0111\u1eb7t m\u1eabu c\u1ea1nh t\u01b0\u1eddng trong ho\u1eb7c \u1ed1ng d\u1eabn kh\u00ed \u1edf m\u1ed9t b\u00ean s\u1ebd \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn chu tr\u00ecnh nhi\u1ec7t trong bu\u1ed3ng, d\u1eabn \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u. Theo y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n th\u1eed nghi\u1ec7m, \u0111\u1ed1i v\u1edbi th\u1eed nghi\u1ec7m m\u1eabu t\u1ea3n nhi\u1ec7t: th\u1ec3 t\u00edch m\u1eabu t\u1ea3n nhi\u1ec7t t\u1ed1i \u0111a l\u00e0 1\/5 th\u1ec3 t\u00edch c\u1ee7a bu\u1ed3ng th\u1eed nghi\u1ec7m.<\/span><\/span><\/li>\n<\/ul>\n
            \n
          • 1.6 \u0110\u1ed9 k\u00edn<\/span><\/span><\/span>
            \n \u0110\u1ed9 k\u00edn c\u1ee7a bu\u1ed3ng v\u00e0 c\u1eeda kh\u00f4ng ch\u1eb7t ch\u1ebd. V\u00ed d\u1ee5, khi d\u1ea3i ni\u00eam phong b\u1ecb h\u1ecfng v\u00e0 c\u1eeda b\u1ecb r\u00f2 r\u1ec9, t\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m trong bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/span><\/span><\/li>\n<\/ul>\n
              \n
            • 1.7 T\u1ed1c \u0111\u1ed9 gi\u00f3<\/span><\/span><\/span>
              \n Nh\u00ecn chung, trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng, t\u1ed1c \u0111\u1ed9 gi\u00f3 trong bu\u1ed3ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 1,7 m\/s. N\u1ebfu t\u1ed1c \u0111\u1ed9 gi\u00f3 qu\u00e1 l\u1edbn, n\u00f3 s\u1ebd \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i nhi\u1ec7t gi\u1eefa b\u1ec1 m\u1eb7t c\u1ee7a m\u1eabu th\u1eed v\u00e0 lu\u1ed3ng kh\u00f4ng kh\u00ed ch\u1ea3y trong bu\u1ed3ng, \u0111\u1ed3ng th\u1eddi c\u0169ng \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh bay h\u01a1i \u0111\u1ed9 \u1ea9m trong g\u1ea1c bi \u01b0\u1edbt, \u0111i\u1ec1u n\u00e0y kh\u00f4ng c\u00f3 l\u1ee3i cho th\u1eed nghi\u1ec7m v\u00e0 ph\u00e9p \u0111o \u0111\u1ed9 \u1ea9m kh\u00f4ng ch\u00ednh x\u00e1c. Do \u0111\u00f3, trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, t\u1ed1c \u0111\u1ed9 gi\u00f3 c\u00e0ng nh\u1ecf th\u00ec c\u00e0ng t\u1ed1t. Tuy nhi\u00ean, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m trong bu\u1ed3ng, c\u1ea7n ph\u1ea3i l\u01b0u th\u00f4ng kh\u00f4ng kh\u00ed trong bu\u1ed3ng th\u1eed nghi\u1ec7m. Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m kh\u00f4ng t\u1ea3i, t\u1ed1c \u0111\u1ed9 gi\u00f3 trung b\u00ecnh trong bu\u1ed3ng l\u00e0 0,6 ~ 0,8 m\/s.<\/span><\/span><\/li>\n<\/ul>\n
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              • 1.8 \u0110\u1ed9 ch\u00ednh x\u00e1c \u0111i\u1ec1u khi\u1ec3n<\/span><\/span><\/span>
                \n Sau khi bu\u1ed3ng th\u1eed \u0111\u1ea1t \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m c\u00e0i \u0111\u1eb7t, s\u1ebd c\u00f3 m\u1ed9t s\u1ef1 dao \u0111\u1ed9ng nh\u1ea5t \u0111\u1ecbnh trong m\u1ed9t th\u1eddi gian ng\u1eafn v\u00ec s\u1ef1 ph\u00e2n k\u1ef3 nhi\u1ec7t kh\u00f4ng ho\u00e0n to\u00e0n \u0111\u1ed3ng \u0111\u1ec1u. B\u1eb1ng c\u00e1ch c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111i\u1ec1u khi\u1ec3n c\u1ee7a bu\u1ed3ng th\u1eed v\u00e0 gi\u1ea3m s\u1ef1 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9, c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u1ed9 l\u1ec7ch nhi\u1ec7t \u0111\u1ed9. \u0110\u1ed1i v\u1edbi bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 cao, s\u1ef1 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh li\u00ean t\u1ee5c PID c\u1ee7a c\u00f4ng su\u1ea5t gia nhi\u1ec7t; \u0110\u1ed1i v\u1edbi bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, s\u1ef1 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t th\u00f4ng qua c\u00e2n b\u1eb1ng nhi\u1ec7t, ngh\u0129a l\u00e0 sau khi bu\u1ed3ng th\u1eed \u0111\u1ea1t \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 c\u00e0i \u0111\u1eb7t, t\u1ee7 l\u1ea1nh v\u1eabn m\u1edf b\u00ecnh th\u01b0\u1eddng v\u00e0 c\u00f4ng su\u1ea5t gia nhi\u1ec7t \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00e2n b\u1eb1ng c\u00f4ng su\u1ea5t l\u00e0m l\u1ea1nh d\u01b0 th\u1eeba.<\/span><\/span><\/li>\n<\/ul>\n

                2 \u0110\u1eb7c \u0111i\u1ec3m \u0111o l\u01b0\u1eddng<\/span><\/span><\/strong><\/span><\/h1>\n

                C\u00e1c \u0111\u1eb7c t\u00ednh \u0111o l\u01b0\u1eddng c\u1ee7a bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m ch\u1ee7 y\u1ebfu bao g\u1ed3m \u0111\u1ed9 l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m, \u0111\u1ed9 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m v\u00e0 \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m.<\/span><\/span><\/p>\n

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                • 2.1<\/span><\/span><\/span>
                  \n \u0110\u1ed9 l\u1ec7ch \u0110\u1ed9 l\u1ec7ch c\u1ee7a bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m hi\u1ec3n th\u1ecb khi thi\u1ebft b\u1ecb th\u1eed m\u00f4i tr\u01b0\u1eddng \u0111\u1ea1t tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh v\u00e0 gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c \u0111o t\u1ea1i t\u00e2m kh\u00f4ng gian l\u00e0m vi\u1ec7c.<\/span><\/span><\/li>\n<\/ul>\n
                    \n
                  • 2.2 Bi\u1ebfn \u0111\u1ed9ng<\/span><\/span><\/span>
                    \n Bi\u1ebfn \u0111\u1ed9ng c\u1ee7a bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m l\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch 1\/2 gi\u1eefa gi\u00e1 tr\u1ecb t\u1ed1i \u0111a v\u00e0 gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u c\u1ee7a nhi\u1ec7t \u0111\u1ed9 (\u0111\u1ed9 \u1ea9m) t\u1ea1i \u0111i\u1ec3m trung t\u00e2m c\u1ee7a kh\u00f4ng gian l\u00e0m vi\u1ec7c trong v\u00f2ng 30 ph\u00fat sau khi gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 (\u0111\u1ed9 \u1ea9m) c\u00e0i \u0111\u1eb7t \u0111\u1ea1t \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/span><\/span><\/li>\n<\/ul>\n
                      \n
                    • 2.3 T\u00ednh \u0111\u1ed3ng nh\u1ea5t<\/span><\/span><\/span>
                      \n T\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 gi\u00e1 tr\u1ecb trung b\u00ecnh s\u1ed1 h\u1ecdc c\u1ee7a ch\u00eanh l\u1ec7ch gi\u1eefa gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 (\u0111\u1ed9 \u1ea9m) cao nh\u1ea5t v\u00e0 th\u1ea5p nh\u1ea5t trong m\u1ed7i l\u1ea7n th\u1eed nghi\u1ec7m trong v\u00f2ng 30 ph\u00fat sau khi gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 (\u0111\u1ed9 \u1ea9m) c\u00e0i \u0111\u1eb7t \u0111\u1ea1t \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/span><\/span><\/li>\n<\/ul>\n

                      3. Th\u1eed nghi\u1ec7m t\u01b0\u01a1ng quan<\/span><\/span><\/strong><\/span><\/h1>\n

                      Theo d\u1eef li\u1ec7u th\u1ef1c nghi\u1ec7m, khi nhi\u1ec7t \u0111\u1ed9 trong bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m kh\u00f4ng \u0111\u1ed5i v\u00e0 \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i t\u0103ng, \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u1ee9ng s\u1ebd \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n r\u1ea5t nhi\u1ec1u. L\u00fd do ch\u00ednh l\u00e0 kh\u00f4ng kh\u00ed l\u00e0 ch\u1ea5t d\u1eabn nhi\u1ec7t k\u00e9m. N\u00f3i chung, khi h\u00e0m l\u01b0\u1ee3ng \u1ea9m th\u1ea5p v\u00e0 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt th\u1ec3 nh\u1ecf, \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a ch\u1ea5t r\u1eafn l\u1edbn h\u01a1n ch\u1ea5t l\u1ecfng v\u00e0 \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a ch\u1ea5t l\u1ecfng l\u1edbn h\u01a1n ch\u1ea5t kh\u00ed. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y ph\u1ea7n l\u1edbn l\u00e0 do kho\u1ea3ng c\u00e1ch ph\u00e2n t\u1eed kh\u00e1c nhau \u1edf c\u00e1c tr\u1ea1ng th\u00e1i kh\u00e1c nhau. \u0110\u1ed1i v\u1edbi kh\u00f4ng kh\u00ed, \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i c\u00e0ng l\u1edbn, t\u1ee9c l\u00e0 t\u1ef7 l\u1ec7 kh\u1ed1i l\u01b0\u1ee3ng h\u01a1i n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed \u01b0\u1edbt so v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng h\u01a1i n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed b\u00e3o h\u00f2a \u1edf c\u00f9ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t c\u00e0ng l\u1edbn, th\u00ec \u0111\u1ed9 \u1ea9m trong kh\u00f4ng kh\u00ed c\u00e0ng l\u1edbn v\u00e0 \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u00e0ng l\u1edbn. Khi t\u1ed1c \u0111\u1ed9 gi\u00f3 kh\u00f4ng \u0111\u1ed5i, s\u1ef1 l\u01b0u th\u00f4ng nhi\u1ec7t v\u00e0 \u0111\u1ed1i l\u01b0u trong bu\u1ed3ng c\u00e0ng t\u1ed1t, gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 dao \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m trong bu\u1ed3ng.<\/span><\/span><\/p>\n

                      4 K\u1ebft lu\u1eadn<\/span><\/span><\/strong><\/span><\/h1>\n

                      Trong c\u00f4ng t\u00e1c hi\u1ec7u chu\u1ea9n h\u00e0ng ng\u00e0y, th\u1ea5y r\u1eb1ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m dao \u0111\u1ed9ng v\u00e0 t\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a c\u00f9ng m\u1ed9t bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m d\u01b0\u1edbi \u0111\u1ed9 \u1ea9m cao t\u1ed1t h\u01a1n so v\u1edbi \u0111\u1ed9 \u1ea9m th\u1ea5p. C\u00f3 \u00fd ki\u1ebfn \u200b\u200bcho r\u1eb1ng \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i c\u00e0ng l\u1edbn, \u0111\u1ed9 \u1ea9m trong kh\u00f4ng kh\u00ed c\u00e0ng l\u1edbn, \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u00e0ng l\u1edbn, \u0111\u1ec3 c\u1ea3i thi\u1ec7n chu tr\u00ecnh nhi\u1ec7t trong bu\u1ed3ng, do \u0111\u00f3, c\u00e1c th\u00ed nghi\u1ec7m x\u00e1c minh c\u00f3 li\u00ean quan \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 th\u1ef1c hi\u1ec7n.<\/span><\/span><\/p>\n

                      Trong b\u00e0i b\u00e1o n\u00e0y, t\u00ednh \u0111\u1ed3ng nh\u1ea5t, dao \u0111\u1ed9ng v\u00e0 \u0111\u1ed9 l\u1ec7ch c\u1ee7a bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch v\u00e0 nghi\u00ean c\u1ee9u v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft. B\u1eb1ng c\u00e1ch t\u0103ng \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i trong bu\u1ed3ng, s\u1ef1 truy\u1ec1n nhi\u1ec7t trong bu\u1ed3ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n, t\u00ednh \u0111\u1ed3ng nh\u1ea5t trong bu\u1ed3ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 v\u00e0 nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m trong bu\u1ed3ng \u1ed5n \u0111\u1ecbnh h\u01a1n. \u0110i\u1ec1u n\u00e0y cung c\u1ea5p s\u1ef1 hi\u1ec3u bi\u1ebft v\u00e0 tham chi\u1ebfu c\u1ea7n thi\u1ebft cho vi\u1ec7c hi\u1ec7u chu\u1ea9n v\u00e0 s\u1eed d\u1ee5ng bu\u1ed3ng th\u1eed nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m trong t\u01b0\u01a1ng lai.<\/span><\/span><\/p>\n

                      \n
                      <\/div>\n
                      <\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

                      V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng nghi\u1ec7p v\u00e0 c\u00f4ng ngh\u1ec7 th\u00f4ng tin, th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng ng\u00e0y c\u00e0ng tr\u1edf th\u00e0nh ph\u01b0\u01a1ng ti\u1ec7n quan tr\u1ecdng \u0111\u1ec3 nhi\u1ec1u vi\u1ec7n nghi\u00ean c\u1ee9u khoa h\u1ecdc v\u00e0 nh\u00e0 m\u00e1y ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m. L\u00e0 m\u1ed9t trong nh\u1eefng thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 quan tr\u1ecdng nh\u1ea5t cho th\u1eed nghi\u1ec7m v\u00e0<\/p>\n","protected":false},"author":1,"featured_media":19840,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc-cong-nghe"],"acf":[],"_links":{"self":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/comments?post=19839"}],"version-history":[{"count":2,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19839\/revisions"}],"predecessor-version":[{"id":22080,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19839\/revisions\/22080"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19840"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}