| 多通道热电阻精密测量若干关键问题的研究 |
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| 引用本文： | 陈平平,杨杰,康丽,张志坚.多通道热电阻精密测量若干关键问题的研究[J].东莞理工学院学报,2010,17(3):61-65. |
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| 作者姓名： | 陈平平 杨杰 康丽 张志坚 |
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| 作者单位： | 东莞理工学院,电子工程学院,广东东莞,523808 |
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| 摘 要： | 在长线传输的热电阻测量过程中,长线传输带来的附加误差和电路工作环境变化带来的附加误差远远超过了热电阻本身的误差。提出一种基于四线制电阻信号传输的自校正电阻测量法,解决了长线传输及电路工作环境变化带来的附加误差。自校正电阻测量法是通过比较三组测量信号的相对大小求得待测电阻值,从而能保证在较恶劣的外界环境下取得较高精度的测量结果。系统中设计的数字滤波功能,能有效地抑制高频干扰和工频干扰。该方法已在中微子探测器稳定性监控中得到了实际应用,效果较好。
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| 关 键 词： | 热电阻测量 漂移 四线制电阻 自校正 |
Design and Implementation of Multi-channel Thermal-resistance Precision Measurement |
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| CHEN Ping-ping,YANG Jie,KANG Li,ZHANG Zhi-jian.Design and Implementation of Multi-channel Thermal-resistance Precision Measurement[J].Journal of Dongguan Institute of Technology,2010,17(3):61-65. |
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| Authors: | CHEN Ping-ping YANG Jie KANG Li ZHANG Zhi-jian |
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| Institution: | CHEN Ping-ping YANG Jie KANG Li ZHANG Zhi-jian (College of Electronic Engineering,Dongguan University of Technology,Dongguan 523808,China) |
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| Abstract: | For thermal-resistance measuring with long-wire transmission,the corresponding additional error caused by circuit changes in the work environment is far more than the requested error.Four-wire resistance signal transmission introduced in this paper provides a way to resolve the additional error.So-called self-correcting resistance measurement is a method to obtain the resistance values under testing by comparing three set results of the corresponding signal values.Compensating the drift in the measurement c... |
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| Keywords: | thermal resistance measurement drift four-wire resistance self-correcting |
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