| 开尔文电桥的灵敏度研究 |
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| 引用本文： | 张俊玲.开尔文电桥的灵敏度研究[J].实验室科学,2012,15(3):101-103. |
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| 作者姓名： | 张俊玲 |
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| 作者单位： | 中国人民武装警察部队学院基础部,河北廊坊,065000 |
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| 摘 要： | 应用基尔霍夫定律,推导出开尔文电桥非平衡时流过检流计的电流表达式,同时分析了影响开尔文电桥灵敏度的主要因素有:工作电流;所用检流计的灵敏度、内阻;各桥臂上的电阻;比例臂系数等,进而得出开尔文电桥灵敏度达到最大值的条件。
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| 关 键 词： | 开尔文电桥 灵敏度 电阻 |
Study on the sensitivity of Kelvin bridge |
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| ZHANG Jun-ling.Study on the sensitivity of Kelvin bridge[J].Laboratory Science,2012,15(3):101-103. |
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| Authors: | ZHANG Jun-ling |
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| Institution: | ZHANG Jun-ling ( Department of Foundation, Chinese Pople＇s Armed Police Force Academy, Langfang 065000, China) |
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| Abstract: | Based on the Kirchhoff ＂s law, we deduce the Kelvin bridge unbalanced expression of the current through the galvanometer, then analyze the influencing factors of Kelvin electric bridge sensitiv- ity, these are working current, the galvanometer sensitivity and resistance, the resistance of each bridge arm, and the arm ratio coefficient. At last, we derive the requirement of the maximum sensitivi- ty. |
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| Keywords: | Kelvin bridge sensitivity resistance |
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