| 数据采集系统输入电阻的不确定度分析与评定 |
| Analysis and evaluation of measurement uncertainty of input resistance of data acquisition systems |
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| 中文摘要: |
| 针对输入电阻的测量误差常常偏大的问题，分析了物理机理和实际原因。讨论了影响输入电阻测量不确定度的几个主要因素，包括标准电压、测量电压、标准电阻取值及误差的影响等，给出了降低输入电阻测量不确定度的主要措施，即标准电阻与输入电阻的量值越接近越好，两者应处于同一数量级，并且两个不同的激励电压差异应该尽量大。通过实例给出了输入电阻测量不确定度的评价结果，表明了该过程的正确性和切实可行性。 |
| 英文摘要: |
| Aiming at the problem of large measurement errors in input resistance, the physical mechanism and practical reasons were analyzed. Several main factors affecting the uncertainty of input resistance measurement were discussed, including standard voltage, measurement voltage, standard resistance value and error, and so on. The main measures to reduce the uncertainty of input resistance measurement were given, that is, the closer the value of standard resistance and input resistance, the better, and the two should be in the same order of magnitude, moreover, the difference between two different excitation voltages should be as large as possible. The evaluation results of input resistance measurement uncertainty are provided through an example, and both the correctness and feasibility of the process are proved. |
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| 中文关键词: 输入电阻 数据采集系统 不确定度分析 评价 校准 |
| 英文关键词:input resistance data acquisition system uncertainty analysis evaluation calibration |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2023.05.14 |
| 引用本文：梁志国, 冯秀娟.数据采集系统输入电阻的不确定度分析与评定[J].计测技术,2023,(5):. |
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