一、引言电磁流量计的干标定(dry calibrotion)是指:通过测量电磁流量计电极和通流道的几何形状、工作磁场的边界条件,然后,根据不同流量下流速的理论分布公式计算出仪表的输出信号的过程。由于电磁场理论发展得比较成熟,使得建立在该理论基础上的电磁流量计的干标定成为可能。国外对这一问题比较重视,近年来做了许多工作,取得了可喜的成绩。 I. INTRODUCTION The dry calibrotion of the electromagnetic flowmeter means that by measuring the geometry of the electromagnetic flowmeter electrode and the flow passage and the boundary condition of the working magnetic field, the instrument is then calculated according to the theoretical distribution formula of the flow velocity under different flow rates The process of the output signal. Due to the mature electromagnetic field theory, making the electromagnetic flowmeter based on the theory of dry calibration possible. Foreign countries attach more importance to this issue and have done a lot of work in recent years and made gratifying achievements.