直流增益和直流偏移的不确定度  

The Uncertainty of Evaluation of DC Gain and Offset

作　　者：梁志国[1] 孙璟宇[1] 曹英杰[1] 

机构地区：[1]长城计量测试技术研究所,北京100095

出　　处：《计量学报》2003年第3期225-230,共6页Acta Metrologica Sinica

摘　　要：介绍了用最小二乘法评价线性测量系统直流增益和直流偏移指标时测量结果的不确定度分析和评价过程。讨论了影响评价结果不确定度的几个主要因素 ,包括信号源误差、被校系统量化误差、被校系统重复性影响、非线性误差影响等等。对一个实例 ,给出了直流增益和直流偏移几项指标不确定度分析和评价结果。该过程及结论可用于分析计量标准相应指标的不确定度 。The uncertainty of evaluation results of DC gain and offset of linear measurement system by using the least mean square method, including the courses of analysis and evaluation of uncertainty of them, is described. Some error sources of DC gain and offset evaluation are discussed, including the errors of signal source, the quantization errors of device under test, the repeatibility of linear system, the environment influences, the linearity effect and the others. In an example of experiment, that the analysis and uncertainty evaluation results of DC gain and offset using the method is presented. The courses and conclusion of analysis and uncertainty evaluation of DC gain and offset can be applied to the uncertainty evaluation of measurement standards of relative specifications, and can also be used in the uncertainty evaluation of DC gain and offset themselves.

关 键 词：计量学 直流增益 直流偏移 不确定度 校准 

分 类 号：TB971[一般工业技术—计量学]