{"id":15636,"date":"2026-01-06T17:22:37","date_gmt":"2026-01-06T09:22:37","guid":{"rendered":"http:\/\/www.erun-tech.com\/?post_type=dt_portfolio&p=15636"},"modified":"2026-01-06T17:22:37","modified_gmt":"2026-01-06T09:22:37","slug":"zhizhenshiwanyongbiaoceliangdianzujiaochengbuzhoudiaolingguichengyuzhuyishixiang","status":"publish","type":"dt_portfolio","link":"http:\/\/www.erun-tech.com\/vi\/project\/zhizhenshiwanyongbiaoceliangdianzujiaochengbuzhoudiaolingguichengyuzhuyishixiang","title":{"rendered":"H\u01b0\u1edbng d\u1eabn \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng kim: C\u00e1c b\u01b0\u1edbc, quy tr\u00ecnh \u0111i\u1ec1u ch\u1ec9nh v\u1ec1 0 v\u00e0 c\u00e1c l\u01b0u \u00fd"},"content":{"rendered":"
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Th\u1ef1c h\u00e0nh c\u01a1 b\u1ea3n v\u1ec1 \u0111i\u1ec7n: Nh\u1eadn bi\u1ebft v\u00e0 \u0111o \u0111i\u1ec7n tr\u1edf<\/h1>\n
\u0110\u00e0o t\u1ea1o k\u1ef9 n\u0103ng c\u01a1 b\u1ea3n v\u1ec1 \u0111i\u1ec7n t\u1eed v\u00e0 \u0111i\u1ec7n tr\u00ean t\u00e0u<\/div>\n<\/div>\n
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I. Kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 \u0111i\u1ec7n tr\u1edf<\/h2>\n
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\u0110i\u1ec7n tr\u1edf (Resistance, th\u01b0\u1eddng \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u b\u1eb1ng \u201cR\u201d) l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eadt l\u00fd, trong v\u1eadt l\u00fd h\u1ecdc bi\u1ec3u th\u1ecb m\u1ee9c \u0111\u1ed9 c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a v\u1eadt d\u1eabn. \u0110i\u1ec7n tr\u1edf c\u1ee7a v\u1eadt d\u1eabn c\u00e0ng l\u1edbn, bi\u1ec3u th\u1ecb m\u1ee9c \u0111\u1ed9 c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a v\u1eadt d\u1eabn c\u00e0ng l\u1edbn. C\u00e1c v\u1eadt d\u1eabn kh\u00e1c nhau th\u01b0\u1eddng c\u00f3 \u0111i\u1ec7n tr\u1edf kh\u00e1c nhau, \u0111i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t t\u00ednh ch\u1ea5t c\u1ee7a ch\u00ednh v\u1eadt d\u1eabn. \u0110\u01a1n v\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf l\u00e0 ohm, vi\u1ebft t\u1eaft l\u00e0 \u03a9.<\/p>\n

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\"H\u00ecnh

H\u00ecnh 12-1 H\u00ecnh d\u1ea1ng c\u1ee7a \u0111i\u1ec7n tr\u1edf<\/p><\/div>\n<\/div>\n<\/div>\n<\/section>\n

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II. C\u00e1c b\u01b0\u1edbc \u0111o \u0111i\u1ec7n tr\u1edf (\u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng kim)<\/h2>\n
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1<\/span>
\nCh\u1ecdn t\u1ef7 l\u1ec7:<\/strong>Ch\u1ecdn \u0111i\u1ec7n tr\u1edf cho b\u1ea5t k\u1ef3 h\u1ec7 s\u1ed1 nh\u00e2n n\u00e0o. Th\u00f4ng th\u01b0\u1eddng, \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng c\u00f3 n\u0103m d\u1ea3i \u0111o: R\u00d71, R\u00d710, R\u00d7100, R\u00d71k v\u00e0 R\u00d710k.<\/div>\n
2<\/span>
\n\u0110i\u1ec1u ch\u1ec9nh \u0111i\u1ec3m 0 c\u1ee7a ohm:<\/strong>N\u1ed1i ng\u1eafn hai \u0111\u1ea7u d\u00f2 m\u00e0u \u0111\u1ecf v\u00e0 \u0111en, s\u1eed d\u1ee5ng n\u00fam \u0111i\u1ec1u ch\u1ec9nh Ohm \u0111\u1ec3 kim \u0111\u1ed3ng h\u1ed3 ch\u1ec9 v\u00e0o v\u1ecb tr\u00ed 0 tr\u00ean thang \u0111o Ohm.<\/div>\n
3<\/span>
\n\u0110o l\u01b0\u1eddng k\u1ebft n\u1ed1i:<\/strong>K\u1ebft n\u1ed1i \u0111i\u1ec7n tr\u1edf c\u1ea7n \u0111o v\u00e0o hai \u0111\u1ea7u c\u1ee7a que \u0111o m\u00e0u \u0111\u1ecf v\u00e0 \u0111en \u0111\u1ec3 \u0111o gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf. C\u1ea7n ch\u00fa \u00fd \u0111i\u1ec1u ch\u1ec9nh h\u1ec7 s\u1ed1 nh\u00e2n theo s\u1ef1 l\u1ec7ch c\u1ee7a kim \u0111\u1ed3ng h\u1ed3, c\u1ed1 g\u1eafng gi\u1eef cho kim \u0111\u1ed3ng h\u1ed3 ch\u1ec9 v\u00e0o g\u1ea7n gi\u1eefa thang \u0111o.Sau khi thay \u0111\u1ed5i t\u1ef7 l\u1ec7, c\u1ea7n ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh l\u1ea1i v\u1ec1 0.<\/strong><\/div>\n
4<\/span>
\nT\u00ednh to\u00e1n s\u1ed1 \u0111\u1ecdc:<\/strong>\u0110\u1ecdc gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf th\u01b0\u1eddng gi\u1eef l\u1ea1i hai ch\u1eef s\u1ed1 c\u00f3 ngh\u0129a, \u0111\u1ecdc t\u1eeb ph\u1ea3i sang tr\u00e1i;
\nGi\u00e1 tr\u1ecb \u0111o th\u1ef1c t\u1ebf c\u1ee7a \u0111i\u1ec7n tr\u1edf = Gi\u00e1 tr\u1ecb \u0111\u1ecdc \u00d7 H\u1ec7 s\u1ed1 nh\u00e2n<\/strong>\u3002<\/div>\n<\/div>\n
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\"12-2

12-2 S\u01a1 \u0111\u1ed3 \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng<\/p><\/div>\n

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III. Nh\u1eefng \u0111i\u1ec1u c\u1ea7n l\u01b0u \u00fd khi \u0111o \u0111i\u1ec7n tr\u1edf<\/h2>\n
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An to\u00e0n v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c<\/div>\n
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(1) \u0110\u1eb7c t\u00ednh thang \u0111o:<\/strong>Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ghi tr\u00ean v\u1ea1ch chia \u0111\u1ed9 c\u1ee7a \u0111i\u1ec7n tr\u1edf ng\u01b0\u1ee3c l\u1ea1i v\u1edbi c\u00e1c v\u1ea1ch chia \u0111\u1ed9 kh\u00e1c, \u0111i\u1ec3m \u201c0\u201d c\u1ee7a v\u1ea1ch chia \u0111\u1ed9 n\u1eb1m \u1edf ph\u00eda b\u00ean ph\u1ea3i c\u1ee7a v\u1ea1ch chia \u0111\u1ed9 v\u00e0 c\u00e1c v\u1ea1ch chia \u0111\u1ed9 kh\u00f4ng \u0111\u01b0\u1ee3c ghi \u0111\u1ec1u nhau.<\/p>\n

(2) Nghi\u00eam c\u1ea5m mang \u0111i\u1ec7n:<\/strong>Kh\u00f4ng \u0111\u01b0\u1ee3c \u0111o \u0111i\u1ec7n tr\u1edf khi c\u00f3 \u0111i\u1ec7n. Trong m\u1ea1ch c\u00f3 t\u1ee5 \u0111i\u1ec7n l\u1edbn, sau khi ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n v\u1eabn ph\u1ea3i x\u1ea3 \u0111i\u1ec7n cho t\u1ee5 \u0111i\u1ec7n; n\u1ebfu c\u00f3 nh\u00e1nh song song, \u00edt nh\u1ea5t ph\u1ea3i ng\u1eaft m\u1ed9t \u0111\u1ea7u c\u1ee7a \u0111i\u1ec7n tr\u1edf kh\u1ecfi m\u1ea1ch.<\/p>\n

(3) Quy \u0111\u1ecbnh v\u1ec1 \u0111i\u1ec1u ch\u1ec9nh v\u1ec1 0:<\/strong>Tr\u01b0\u1edbc khi \u0111o, c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh v\u1ec1 0. M\u1ed7i l\u1ea7n chuy\u1ec3n \u0111\u1ed5i m\u1ed9t m\u1ee9c, c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh l\u1ea1i v\u1ec1 0.<\/p>\n

(4) V\u1ecb tr\u00ed \u0111\u1ecdc s\u1ed1:<\/strong>C\u1ed1 g\u1eafng \u0111\u1ec3 kim \u0111\u1ed3ng h\u1ed3 ch\u1ec9 v\u00e0o g\u1ea7n gi\u1eefa m\u1eb7t \u0111\u1ed3ng h\u1ed3.<\/p>\n

(5) Tr\u00e1nh k\u1ebft n\u1ed1i song song c\u01a1 th\u1ec3 ng\u01b0\u1eddi:<\/strong>L\u01b0u \u00fd kh\u00f4ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi \u0111i\u1ec7n tr\u1edf c\u1ee7a c\u01a1 th\u1ec3 ng\u01b0\u1eddi (kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ea1m v\u00e0o ph\u1ea7n kim lo\u1ea1i c\u1ee7a c\u1ea3 hai \u0111\u1ea7u d\u00f2 c\u00f9ng m\u1ed9t l\u00fac).<\/p>\n

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\"8bda1779fb987829d07d35c4f805a807\"<\/p>\n

(a) Ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh x\u00e1c<\/p>\n<\/div>\n

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\"a130ebe0fa1eb9a9fc62f44f847885e8\"<\/p>\n

(b) Ph\u01b0\u01a1ng ph\u00e1p sai l\u1ea7m<\/p>\n<\/div>\n<\/div>\n

H\u00ecnh 12-3 S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng kim<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n