提高小管径频差法超声波流量计测量精度的数理分析

Mathematical Analysis of Increasing Measurement Precision of Ultrasonic Flowmeter with Small Tube Diameter and Frequency Difference Method

小管径频差法超声波流量计的测量精度受各种因素的影响，因而获得较高精度比较困难。本文对影响小管径频差法超声波流量计测量精度的多种因素进行数理分析。在此基础上结合多年研制该流量计的实际经验，提出提高测量精度的措施及其方法。

The precision of the ultrasonic flowmeter with small tube diameter and frequencydifference method is affected by several factors,so to gain more accuracy is difficult. In this paper manyfactors affecting the precision of measurement with the ultrasonic flowmeter with small tube diameterand frequency difference method are analyzed mathematically. Being based on that and combining withthe practical experence of developing this flowmeter for several years, the measure and method forincreasing precision of measurement have been proposed.