{"id":218,"date":"2021-01-26T21:20:22","date_gmt":"2021-01-26T13:20:22","guid":{"rendered":"https:\/\/dt9025a.xyz\/?p=218"},"modified":"2025-01-07T19:17:05","modified_gmt":"2025-01-07T11:17:05","slug":"%e6%a8%a1%e7%94%b5%e5%ae%9e%e9%aa%8c%e4%b9%8b%e9%9b%86%e6%88%90%e8%bf%90%e7%ae%97%e6%94%be%e5%a4%a7%e5%99%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/dt9025a.top\/?p=218","title":{"rendered":"\u6a21\u7535\u5b9e\u9a8c\u4e4b\u96c6\u6210\u8fd0\u7b97\u653e\u5927\u5668\u7684\u57fa\u672c\u5e94\u7528"},"content":{"rendered":"\n

\n
\u670b\u53cb\u4eec\u597d\u554a\uff0c\u6211\u662f\u4ec0\u4e48\u90fd\u4e0d\u4f1a\u7684DT\u3002\u521a\u624d\u6709\u4e2a\u670b\u53cb\u95ee\u6211\u8bf4DT\u53d1\u751f\u4ec0\u4e48\u4e8b\u4e86\uff0c\u6211\u8bf4\u600e\u4e48\u56de\u4e8b\uff0c\u7ed9\u6211\u53d1\u4e86\u51e0\u5f20\u5b9e\u9a8c\u62a5\u544a\u3002\u6211\u4e00\u770b\uff0c\u55f7\uff01\u539f\u6765\u662f\u524d\u51e0\u5929\uff0c\u6709\u4e24\u4e2a\u8fd0\u653e\u5b9e\u9a8c\uff0c\u4e00\u4e2a\u57fa\u672c\u8fd0\u7b97\uff0c\u4e00\u4e2a\u975e\u7ebf\u6027\u5e94\u7528\uff0c\u4e00\u4e2a\u6709\u56db\u4e2a\u5c0f\u5b9e\u9a8c\uff0c\u4e00\u4e2a\u6709\u4e09\u4e2a\u5c0f\u5b9e\u9a8c\uff0c\u4ed6\u4eec\u8bf4 …<\/p>\n<\/blockquote>\n\n\n\n
\u505a\u5b9e\u9a8c\u7684\u65f6\u5019\u4e91\u91cc\u96fe\u91cc\u7684\uff0c\u505a\u5b8c\u5c31\u88ab\u8d76\u56de\u6765\u4e86\uff0c\u4ec0\u4e48\u90fd\u4e0d\u61c2\uff0c\u4ec0\u4e48\u90fd\u4e0d\u4f1a\uff0c\u8fd9\u600e\u4e48\u884c\u5462\uff1f\u518d\u8fd9\u6837\u4e0b\u53bb\u5c31\u6210\u5b66\u672f\u5e9f\u7269\u4e86\uff01\u4e8e\u662f\u82b1\u4e86\u4e00\u4e9b\u65f6\u95f4\u6765\u5bf9\u8fd9\u4e9b\u8fd0\u653e\u7535\u8def\u8fdb\u884c\u4e86\u5206\u6790\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u7535\u8def\u7684\u5206\u6790\u524d\u63d0\uff1a\u5728\u542b\u8fd0\u653e\u7535\u8def\u4e2d\uff0c\u5f53\u8fd0\u653e\u5177\u6709\u8d1f\u53cd\u9988\u7535\u8def\u65f6\uff0c\u9002\u7528\u201c\u865a\u77ed\u865a\u65ad\u201d\u539f\u5219\u3002\u8fd0\u653e\u5de5\u4f5c\u5728\u7ebf\u6027\u533a\u3002<\/em><\/p>\n\n\n\n\n\n\n\n
\n\n\n\n
\u4e00\u3001\u53cd\u76f8\u6bd4\u4f8b\u8fd0\u7b97\u7535\u8def<\/h3>\n\n\n
\n
$\"\"$
\u7535\u8def\u793a\u610f\u56fe<\/figcaption><\/figure>\n<\/div>\n\n\n
\u7535\u8def\u4f5c\u7528\uff1a\u7528\u4e8e\u8f93\u51fa\u4e00\u4e2a\u4e0e\u8f93\u5165\u6210\u8d1f\u6bd4\u4f8b\u7684\u7535\u538b\uff0c\u901a\u5e38\u6bd4\u4f8b\u4e3a$-\\frac{R_{F}}{R_{1}}$<\/strong><\/p>\n\n\n\n
\u5bf9\u8be5\u7535\u8def\u5e94\u7528\u865a\u77ed\u865a\u65ad\u539f\u5219\uff0c\u6709\u5982\u4e0b\u516c\u5f0f\uff1a<\/p>\n\n\n\n
$$\\begin{aligned} &\\begin{cases} I_{N} =I_{P} \\approx0 &\\text{, \u865a\u65ad}\\\\ U_{N} \\approx U_{P} =R_{3} \\times I_{P} =0 &\\text{, \u865a\u77ed}\\end{cases}\\\\ &\\Rightarrow I_{R_{1}}=I_{R_{F}} +I_{N} \\approx I_{R_{F}}\\\\ &\\Rightarrow \\frac{U_{i}-U_{N}}{R_{1}} = \\frac{U_{o}-U_{N}}{R_{F}}\\\\ &\\Rightarrow U_{o} = -\\frac{R_{F}}{R_{1}}\\times U_{i}\\end{aligned}$$<\/p>\n\n\n\n
\u5176\u4e2d $$R_{3}=R_{1}\/\/R_{F}$$<\/p>\n\n\n\n
\uff08\u7531\u4e8e\u624b\u5934\u6ca1\u6709\u8d1f\u538b\u7535\u6e90\uff0c\u53ea\u642d\u5efa\u540c\u76f8\u7535\u8def\uff09<\/p>\n\n\n\n
\n\n\n\n
\u4e8c\u3001\u540c\u76f8\u6bd4\u4f8b\u8fd0\u7b97\u7535\u8def<\/h3>\n\n\n
\n
$\"\"$
\u7535\u8def\u793a\u610f\u56fe<\/figcaption><\/figure>\n<\/div>\n\n\n
\u7535\u8def\u4f5c\u7528\uff1a\u7528\u4e8e\u8f93\u51fa\u4e00\u4e2a\u4e0e\u8f93\u5165\u6210\u6b63\u6bd4\u4f8b\u7684\u7535\u538b\uff0c\u901a\u5e38\u6bd4\u4f8b\u4e3a$(1+\\frac{R_{F}}{R_{1}})$<\/strong><\/p>\n\n\n\n
\u5bf9\u8be5\u7535\u8def\u5e94\u7528\u865a\u77ed\u865a\u65ad\u539f\u5219\uff0c\u6709\u5982\u4e0b\u516c\u5f0f\uff1a<\/p>\n\n\n\n
$$\\begin{aligned} &\\begin{cases} I_{N} =I_{P} \\approx0 &\\text{, \u865a\u65ad}\\\\ U_{N} \\approx U_{P} =U_{i} &\\text{, \u865a\u77ed} \\end{cases}\\end{aligned}$$<\/p>\n\n\n\n
\u5bf9\u53cd\u76f8\u8f93\u5165\u8282\u70b9\u4f7f\u7528KCL\u5b9a\u5f8b\uff0c\u6709<\/p>\n\n\n\n
$$\\begin{aligned}&\\frac{U_{i}}{R_{1}} = -\\frac{U_{i}-U_{o}}{R_{F}}\\\\ &\\Rightarrow -U_{i}\\times\\frac{R_{F}}{R_{1}} = U_{i}-U_{o}\\\\ &\\Rightarrow {U_{o}} = U_{i}\\times(1+\\frac{R_{F}}{R_{1}})\\end{aligned}$$<\/p>\n\n\n\n
\u5176\u4e2d $$R_{3}=R_{1}\/\/R_{F}$$<\/p>\n\n\n\n
\u5b9e\u4f8b\u642d\u5efa\uff1a<\/strong><\/p>\n\n\n\n
\u8fd0\u653e\u4e3aNE5532\uff0cRf=R1=1K\u03a9\uff0cR=470\u03a9\u3002<\/p>\n\n\n\n
\u8fd0\u653e\u4f9b\u7535\u4e3aRiden RD6006\uff0c12V\/0.5A\uff0c\u8f93\u5165\u7535\u538b\u4e3a\u9502\u7535\u6c60\u4f9b\u7535\u3002<\/p>\n\n\n\n
$\"\"$ <\/figure>\n\n\n\n
CH1\u4e3a\u8fd0\u653e\u8f93\u51fa\uff0cCH2\u4e3a\u7535\u6e90\u4f9b\u7535\u3002<\/p>\n\n\n\n
$\"\"$ <\/figure>\n\n\n\n
\n\n\n\n
\u4e09\u3001\u53cd\u76f8\u6c42\u548c\u8fd0\u7b97\u7535\u8def<\/h3>\n\n\n
\n
$\"\"$
\u7535\u8def\u793a\u610f\u56fe<\/figcaption><\/figure>\n<\/div>\n\n\n
\u7535\u8def\u4f5c\u7528\uff1a\u7528\u4e8e\u8f93\u51fa\u4e00\u4e2a\u4e0e\u8f93\u5165\u7535\u538b\u548c\u6210\u4e00\u8d1f\u6bd4\u4f8b\u7684\u7535\u538b\uff0c\u901a\u5e38\u8f93\u51fa\u7ed3\u679c\u4e3a$$-R_{F} \\times (U_{i_{1}}+U_{i_{2}}+U_{i_{3}})$<\/strong>$<\/p>\n\n\n\n
\u5bf9\u8be5\u7535\u8def\u5e94\u7528\u865a\u77ed\u865a\u65ad\u539f\u5219\uff0c\u6709\u5982\u4e0b\u516c\u5f0f\uff1a<\/p>\n\n\n\n
$$\\begin{aligned} &\\begin{cases} I_{N} =I_{P} \\approx0 &\\text{, \u865a\u65ad}\\\\ U_{N} \\approx U_{P} =R_{4} \\times I_{P} =0 &\\text{, \u865a\u77ed}\\end{cases}\\end{aligned}$$<\/p>\n\n\n\n
\u5bf9\u53cd\u76f8\u8f93\u5165\u8282\u70b9\u4f7f\u7528KCL\u5b9a\u5f8b\uff0c\u6709<\/p>\n\n\n\n
$$ \\begin{aligned} &\\frac{U_{i_{1}}}{R_{1}}+\\frac{U_{i_{2}}}{R_{2}}+\\frac{U_{i_{3}}}{R_{3}} = -\\frac{U_{o}}{R_{F}}\\\\ &\\Rightarrow U_{o} = -R_{F} \\times (\\frac{U_{i_{1}}}{R_{1}}+\\frac{U_{i_{2}}}{R_{2}}+\\frac{U_{i_{3}}}{R_{3}})\\end{aligned}$$<\/p>\n\n\n\n
\u5176\u4e2d $$R_{4}=R_{1}\/\/R_{2}\/\/R_{3}\/\/R_{F}$$\u3002<\/p>\n\n\n\n
\u5f53$$R_{1}=R_{2}=R_{3}=R_{F}$$\u65f6\uff0c$$U_{o} = -R_{F} \\times (U_{i_{1}}+U_{i_{2}}+U_{i_{3}})$$<\/p>\n\n\n\n
\n\n\n\n
\u56db\u3001\u540c\u76f8\u6c42\u548c\u8fd0\u7b97\u7535\u8def<\/h3>\n\n\n
\n
$\"\"$
\u7535\u8def\u793a\u610f\u56fe<\/figcaption><\/figure>\n<\/div>\n\n\n
\u7535\u8def\u4f5c\u7528\uff1a\u7528\u4e8e\u8f93\u51fa\u4e00\u4e2a\u4e0e\u8f93\u5165\u7535\u538b\u548c\u6210\u4e00\u6b63\u6bd4\u4f8b\u7684\u7535\u538b\uff0c\u901a\u5e38\u8f93\u51fa\u7ed3\u679c\u4e3a<\/strong><\/p>\n\n\n\n
$$R_{F}(\\frac{U_{i_{1}}}{R_{1}}+\\frac{U_{i_{2}}}{R_{2}}+\\frac{U_{i_{3}}}{R_{3}})$$<\/p>\n\n\n\n
\u7c7b\u6bd4\u4e8e\u540c\u76f8\u6bd4\u4f8b\u8fd0\u7b97\u7535\u8def\uff0c\u5b58\u5728$${U_{o}} = U_{i}\\times(1+\\frac{R_{F}}{R_{1}})$$<\/p>\n\n\n\n
\u56e0\u6b64\uff0c\u5bf9\u540c\u76f8\u8f93\u5165\u8282\u70b9\u4f7f\u7528KCL\u5b9a\u5f8b\uff0c\u6709<\/p>\n\n\n\n
$$\\begin{aligned} &\\frac{U_{i_{1}}-U_{P}}{R_{1}}+\\frac{U_{i_{2}}-U_{P}}{R_{2}}+\\frac{U_{i_{3}}-U_{P}}{R_{3}} = \\frac{U_{P}}{R_{4}}\\\\&\\Rightarrow U_{P} = R_{P} \\times (\\frac{U_{i_{1}}}{R_{1}}+\\frac{U_{i_{2}}}{R_{2}}+\\frac{U_{i_{3}}}{R_{3}})\\end{aligned}$$<\/p>\n\n\n\n
\uff0c\u5176\u4e2d$$R_{P}=R_{1}\/\/R_{2}\/\/R_{3}\/\/R_{4}$$.<\/p>\n\n\n\n
\u7531\u4e0a\u53ef\u5f97\uff1a$$U_{o}=\\frac{R_{P}}{R_{N}}\\times R_{F}(\\frac{U_{i_{1}}}{R_{1}}+\\frac{U_{i_{2}}}{R_{2}}+\\frac{U_{i_{3}}}{R_{3}})$$\uff0c\u5176\u4e2d$$R_{N}=R_{5}\/\/R_{F}$$<\/p>\n\n\n\n
\u82e5\u4f7f$$R_{N}=R_{P}$$\uff0c\u53ef\u5f97$$U_{o}=R_{F}(\\frac{U_{i_{1}}}{R_{1}}+\\frac{U_{i_{2}}}{R_{2}}+\\frac{U_{i_{3}}}{R_{3}})$$<\/p>\n\n\n\n
\n\n\n\n
\u7b26\u53f7\u8bf4\u660e\uff1aI_{N<\/sub> – \u53cd\u76f8\u8f93\u5165\u7aef\u7535\u6d41\uff1b
I_{P<\/sub> – \u540c\u76f8\u8f93\u5165\u7aef\u7535\u6d41\uff1b
U_{N<\/sub> – \u53cd\u76f8\u8f93\u5165\u7aef\u7535\u538b\uff1b
U_{P<\/sub> – \u540c\u76f8\u8f93\u5165\u7aef\u7535\u538b\uff1b
I_{Rn<\/sub> – Rn\u4e0a\u7684\u7535\u6d41\uff1b
U_{Rn<\/sub> – Rn\u4e0a\u7684\u7535\u538b\uff1b
R_{1<\/sub> \/\/ R_{2<\/sub> … \/\/ R_{n<\/sub> – R_{1<\/sub>\u3001R_{2<\/sub>\u5230R_{n<\/sub>\u5e76\u8054<\/span><\/p>\n\n\n\n}}}}}}}}}}}}
\u4f7f\u7528\u7ed8\u56fe\u8f6f\u4ef6\uff1aKiCad<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
\u670b\u53cb\u4eec\u597d\u554a\uff0c\u6211\u662f\u4ec0\u4e48\u90fd\u4e0d\u4f1a\u7684DT\u3002\u521a\u624d\u6709\u4e2a\u670b\u53cb\u95ee\u6211\u8bf4DT\u53d1\u751f\u4ec0\u4e48\u4e8b\u4e86\uff0c\u6211\u8bf4\u600e\u4e48\u56de\u4e8b\uff0c\u7ed9\u6211\u53d1\u4e86\u51e0\u5f20\u5b9e\u9a8c\u62a5\u544a\u3002\u6211\u4e00… <\/p>\n
\u9605\u8bfb\u66f4\u591a