端基直线法测量直流增益和直流偏移的不确定度

介绍了用端基直线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,包含了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误差来源,包括信号源误差、被校系统测量误差、被校系统量化误差的影响等等,给出了端基直流增益和直流偏移测量结果的不确定度.在一个实际评价例子上,给出了直流增益和直流偏移指标不确定度分析和评价结果;不确定度验证表明了该过程的正确性和切实可行性.该过程及结论可应用在对于计量标准进行直流增益和直流偏移指标的不确定度分析上.

Measurement of Uncertainty of DC Gain and Offset by Terminal-based Straight Line Method

In this paper,it is described that the uncertainty of evaluation results of DC gain and offset of linear measurement system by using the terminal-based straight line method,including the courses of analysis and evaluation of uncertainty.Some error sources of evaluation are discussed,including the errors of signal source,the measurement errors of the calibrated system,the influence of quantization error of calibrated system,the environment influence,and so on.Both the DC gain uncertainty and the offset uncertainty of terminal-based line measurement systems are given out.For an example of experiment,the analysis and uncertainty evaluation results of both DC gain and offset by using the method in this paper is presented.The verification of the uncertainty has proved the correctness and feasibility of the above method.The courses and conclusion proposed can be applied to the uncertainty evaluation of measurement standards of both DC gain and offset.