| 高共模电压下4～20mA电流环路信号的拾取 |
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| 引用本文： | 朱玉田,唐兴华.高共模电压下4～20mA电流环路信号的拾取[J].机械与电子,2009(1):74-75. |
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| 作者姓名： | 朱玉田 唐兴华 |
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| 作者单位： | 同济大学机械工程学院,上海,200092 |
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| 摘 要： | 针对4～20mA电流环路远距离传输模拟信号过程中的高共模电压干扰，提出用环路供电型线性光耦电路实现隔离，实验验证表明，该电路可以在上百伏的共模干扰电压下，有效拾取远程模拟信号。
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| 关 键 词： | 干扰 共模电压 隔离 环路供电 |
Pick up 4~20mA Current Loop Signal under High Common-mode Voltage |
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| ZHU Yu-tian,TANG Xing-hua.Pick up 4~20mA Current Loop Signal under High Common-mode Voltage[J].Machinery & Electronics,2009(1):74-75. |
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| Authors: | ZHU Yu-tian TANG Xing-hua |
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| Affiliation: | College of Mechanical Engineering;Tongji University;Shanghai 200092;China |
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| Abstract: | To eliminate the common-mode voltage interference in a 4~20mA current loop transmitted over a long distance,a loop powered linear optocoupler isolation circuit is developed.Experiments indicate that even there is an over hundred volt common-mode voltage,the circuit can pick up the remote analog signal accurately. |
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| Keywords: | interference common-mode voltage isolation loop powered |
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