{"id":676422,"date":"2024-11-22T11:28:43","date_gmt":"2024-11-22T10:28:43","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=676422"},"modified":"2024-11-22T11:28:43","modified_gmt":"2024-11-22T10:28:43","slug":"cam-bien-nhiet-dien-hoat-dong-nhu-the-nao-de-phat-hien-nhiet-do","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/cam-bien-nhiet-dien-hoat-dong-nhu-the-nao-de-phat-hien-nhiet-do\/","title":{"rendered":"C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9"},"content":{"rendered":"

C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9: t\u00ecm hi\u1ec3u nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a c\u1ea3m bi\u1ebfn n\u00e0y trong nhi\u1ec7t k\u1ebf v\u00e0 c\u00f4ng nghi\u1ec7p.<\/p>\n

\"C\u1ea3m<\/p>\n

C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9<\/h2>\n

C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n, c\u00f2n g\u1ecdi l\u00e0 nhi\u1ec7t \u0111i\u1ec7n tr\u1edf ho\u1eb7c thermocouple, l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb d\u00f9ng \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec7t \u0111i\u1ec7n. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n b\u1edfi nh\u00e0 v\u1eadt l\u00fd ng\u01b0\u1eddi \u0110\u1ee9c, Thomas Johann Seebeck, v\u00e0o \u0111\u1ea7u th\u1ebf k\u1ef7 19.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/h3>\n

C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd hi\u1ec7u \u1ee9ng Seebeck. Hi\u1ec7u \u1ee9ng n\u00e0y n\u00f3i r\u1eb1ng khi hai d\u00e2y d\u1eabn kim lo\u1ea1i kh\u00e1c nhau \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi nhau t\u1ea1i hai \u0111i\u1ec3m v\u00e0 c\u00f3 m\u1ed9t ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa hai \u0111i\u1ec3m \u0111\u00f3, m\u1ed9t su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng (EMF) s\u1ebd \u0111\u01b0\u1ee3c t\u1ea1o ra. Su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng n\u00e0y t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9.<\/p>\n

Gi\u1ea3 s\u1eed ch\u00fang ta c\u00f3 hai kim lo\u1ea1i A v\u00e0 B, ch\u00fang \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi nhau t\u1ea1i hai \u0111i\u1ec3m g\u1ecdi l\u00e0 junctions. M\u1ed9t junction \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu Tref<\/sub> v\u00e0 junction kia \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ea7n \u0111o Tmeas<\/sub>. Su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng t\u1ea1o ra (E) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng c\u00f4ng th\u1ee9c:<\/p>\n

E = \u03b1 * (Tmeas<\/sub> – Tref<\/sub>)<\/p>\n

Trong \u0111\u00f3, \u03b1 l\u00e0 h\u1eb1ng s\u1ed1 Seebeck, ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i kim lo\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n

C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n<\/h3>\n

<\/p>\n

  • C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n:<\/b> \u0110\u00e2y l\u00e0 hai d\u00e2y kim lo\u1ea1i kh\u00e1c nhau \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i t\u1ea1i hai \u0111i\u1ec3m junctions.<\/li>\n
  • Junction:<\/b> M\u1ed9t junction \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu v\u00e0 junction kia \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ea7n \u0111o.<\/li>\n
  • B\u1ed9 khu\u1ebfch \u0111\u1ea1i:<\/b> \u0110\u1ec3 \u0111o \u0111\u01b0\u1ee3c su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng r\u1ea5t nh\u1ecf, c\u1ea7n ph\u1ea3i c\u00f3 m\u1ed9t b\u1ed9 khu\u1ebfch \u0111\u1ea1i \u0111\u1ec3 t\u0103ng t\u00edn hi\u1ec7u l\u00ean m\u1ee9c c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/li>\n

    <\/u1><\/p>\n

    \u1ee8ng d\u1ee5ng c\u1ee7a c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n<\/h3>\n

    C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 khoa h\u1ecdc nh\u1edd v\u00e0o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng \u0111o nhi\u1ec7t \u0111\u1ed9 r\u1ea5t cao. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n

    <\/p>\n

  • \u0110o l\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 trong l\u00f2 n\u01b0\u1edbng:<\/b> C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao, th\u00edch h\u1ee3p cho vi\u1ec7c gi\u00e1m s\u00e1t nhi\u1ec7t \u0111\u1ed9 trong c\u00e1c l\u00f2 n\u1ea5u.<\/li>\n
  • \u1ee8ng d\u1ee5ng trong \u0111\u1ed9ng c\u01a1:<\/b> Gi\u00fap theo d\u00f5i nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o n\u00f3 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/li>\n
  • Th\u00ed nghi\u1ec7m khoa h\u1ecdc:<\/b> S\u1eed d\u1ee5ng trong c\u00e1c th\u00ed nghi\u1ec7m c\u1ea7n \u0111o l\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/li>\n

    <\/u1><\/p>\n

    V\u1edbi kh\u1ea3 n\u0103ng \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c v\u00e0 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i, c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c c\u1ee7a cu\u1ed9c s\u1ed1ng v\u00e0 c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"excerpt":{"rendered":"

    C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9: t\u00ecm hi\u1ec3u nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a c\u1ea3m bi\u1ebfn n\u00e0y trong nhi\u1ec7t k\u1ebf v\u00e0 c\u00f4ng nghi\u1ec7p.<\/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":"\nC\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9<\/title>\n<meta name=\"description\" content=\"C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9: t\u00ecm hi\u1ec3u nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a c\u1ea3m bi\u1ebfn n\u00e0y trong nhi\u1ec7t k\u1ebf v\u00e0 c\u00f4ng nghi\u1ec7p.\" \/>\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\/cam-bien-nhiet-dien-hoat-dong-nhu-the-nao-de-phat-hien-nhiet-do\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9\" \/>\n<meta property=\"og:description\" content=\"C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e1t hi\u1ec7n nhi\u1ec7t \u0111\u1ed9: t\u00ecm hi\u1ec3u nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng 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