规则小孔的流导可以通过计算得到,但对于非规则小孔,若要准确得到小孔流导的大小,就必须通过实验测量得到。文章论述了定容法测量小孔流导的方法,进行了测量不确定度的评定,得到了整个校准范围内小孔流导随进气压力变化的拟合曲线和方程,小孔流导的测量不确定度为1.1%。 The rules of small hole flow can be calculated, but for irregular holes, to accurately obtain the size of the hole flow guide, we must experimentally measured. In this paper, the method of measuring volumetric flow conductivity by constant volume method is discussed and the uncertainty of measurement is evaluated. The fitting curves and equations of pore flow conductance with intake pressure change over the whole calibration range are obtained. The measurement uncertainty is 1.1%.